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Study on the Weak Decays (2015)

Junfeng Sun, Lili Chen, Na Wang, Qin Chang, Jinshu Huang, and Yueling Yang

Hindawi

In: Advances in High Energy Physics

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Publikationsdatum: 2015-08-11

Beschreibung: Motivated by the prospects of the potential particle at high-luminosity heavy-flavor experiments, we studied the weak decays, where = , , . The nonfactorizable contributions to hadronic matrix elements are taken into consideration with the QCDF approach. It is found that the CKM-favored decay has branching ratio of , which might be measured promisingly by the future experiments.

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Positive-parity rotational band in ^{158} Tb (2015)

J. Zhong, H. L. Ma, S. P. Hu, X. G. Wu, H. B. Sun, G. S. Li, C. Y. He, Y. Zheng, C. B. Li, Q. M. Chen, H. W. Li, Y. H. Wu, and P. W. Luo

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-11

Beschreibung: Author(s): J. Zhong, H. L. Ma, S. P. Hu, X. G. Wu, H. B. Sun, G. S. Li, C. Y. He, Y. Zheng, C. B. Li, Q. M. Chen, H. W. Li, Y. H. Wu, and P. W. Luo Excited states of the odd-odd nucleus Tb 158 have been studied via the Sm 154 ( Li 7 , 3 n ) Tb 158 reaction at a beam energy of 27 MeV. The new level scheme of Tb 158 involving a positive parity rotational band is established up to excitation energy ∼ 2.3 MeV and spin ∼ 17 ℏ . By comparing with the rotational bands… [Phys. Rev. C 92, 024308] Published Mon Aug 10, 2015

Schlagwort(e): Nuclear Structure

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Velocity-dependent transverse momentum distribution of fragments produced from ^{40} Ar+ ^{9} Be at 95 MeV/nucleon (2015)

S. Momota, I. Tanihata, A. Ozawa, M. Notani, K. Yoshida, K. Morimoto, T. Yamaguchi, T. Onishi, A. Yoshida, Y. X. Watanabe, Z. Liu, and A. Ono

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-11

Beschreibung: Author(s): S. Momota, I. Tanihata, A. Ozawa, M. Notani, K. Yoshida, K. Morimoto, T. Yamaguchi, T. Onishi, A. Yoshida, Y. X. Watanabe, Z. Liu, and A. Ono Transverse momentum ( P T ) distributions of projectilelike fragments produced at intermediate energy are investigated. P T distributions of fragments with mass A F = 10 – 37 , produced from an Ar 40 beam with E = 95 MeV / nucleon and a Be target, are observed as a function of fragment velocity by using the Rikagak… [Phys. Rev. C 92, 024608] Published Mon Aug 10, 2015

Schlagwort(e): Nuclear Reactions

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Centrality dependence of mapping the hydrodynamic response to the initial geometry in heavy-ion collisions (2015)

Jinghua Fu

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-11

Beschreibung: Author(s): Jinghua Fu Event-by-event correlations between v n and ɛ m , n for different collision centralities are studied with hydrodynamics. For the more central collisions v n is better correlated with ɛ m , n defined with relatively larger radial weight power m , like m = n + 1 . For the more peripheral collisions, v n prefers ɛ m , n … [Phys. Rev. C 92, 024904] Published Mon Aug 10, 2015

Schlagwort(e): Relativistic Nuclear Collisions

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Differential Hanbury-Brown–Twiss approach for an exact hydrodynamic model with rotation (2015)

S. Velle and L. P. Csernai

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-11

Beschreibung: Author(s): S. Velle and L. P. Csernai We study an exact rotating and expanding solution of the fluid dynamical model of heavy ion reactions, that take into account the rate of slowing down of the rotation due to the longitudinal and transverse expansion of the system. The parameters of the model are set on the basis of realistic 3+1D fl… [Phys. Rev. C 92, 024905] Published Mon Aug 10, 2015

Schlagwort(e): Relativistic Nuclear Collisions

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Lifetime measurement for the possible antimagnetic rotation band in ^{101} Pd (2015)

M. Sugawara, T. Hayakawa, M. Oshima, Y. Toh, A. Osa, M. Matsuda, T. Shizuma, Y. Hatsukawa, H. Kusakari, T. Morikawa, Z. G. Gan, and T. Czosnyka

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-11

Beschreibung: Author(s): M. Sugawara, T. Hayakawa, M. Oshima, Y. Toh, A. Osa, M. Matsuda, T. Shizuma, Y. Hatsukawa, H. Kusakari, T. Morikawa, Z. G. Gan, and T. Czosnyka Lifetime measurements were made for the ν h 11 / 2 band in Pd 101 , which had been interpreted as a possible antimagnetic rotation band based on the comparison of I − ω behavior with the calculation of a semiclassical particle-rotor model in our previous study. Doppler broadened line shapes were analyzed fo… [Phys. Rev. C 92, 024309] Published Mon Aug 10, 2015

Schlagwort(e): Nuclear Structure

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Analysis of proton + ^{12} C scattering by microscopic coupled-channels calculations (2015)

M. Tomita, M. Iwasaki, R. Otani, K. Horio, and M. Ito

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-12

Beschreibung: Author(s): M. Tomita, M. Iwasaki, R. Otani, K. Horio, and M. Ito The microscopic coupled-channel (MCC) calculations for proton + C 12 inelastic scattering are performed in the energy range of E p = 29.95 to 65 MeV. The nuclear interactions for the proton- C 12 system are constructed from the folding model, which employs the internal wave function of C 12 , obtained from t… [Phys. Rev. C 92, 024609] Published Tue Aug 11, 2015

Schlagwort(e): Nuclear Reactions

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Torsion Wave Solutions in Yang-Mielke Theory of Gravity (2015)

Vedad Pasic and Elvis Barakovic

Hindawi

In: Advances in High Energy Physics

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Publikationsdatum: 2015-08-13

Beschreibung: The approach of metric-affine gravity initially distinguishes it from Einstein’s general relativity. Using an independent affine connection produces a theory with 10 + 64 unknowns. We write down the Yang-Mills action for the affine connection and produce the Yang-Mills equation and the so-called complementary Yang-Mills equation by independently varying with respect to the connection and the metric, respectively. We call this theory the Yang-Mielke theory of gravity. We construct explicit spacetimes with pp-metric and purely axial torsion and show that they represent a solution of Yang-Mills theory. Finally we compare these spacetimes to existing solutions of metric-affine gravity and present future research possibilities.

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Long-range dynamic polarization potentials for ^{11} Be projectiles on ^{64} Zn (2015)

W. Y. So, K. S. Kim, K. S. Choi, and Myung-Ki Cheoun

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-07-30

Beschreibung: Author(s): W. Y. So, K. S. Kim, K. S. Choi, and Myung-Ki Cheoun We investigate the effects of the long-range dynamic polarization (LRDP) potential, which consists of the Coulomb dipole excitation (CDE) potential and the long-range nuclear (LRN) potential, for the Be 11 projectile on Zn 64 . To study these effects, we perform a χ 2 analysis of an optical model includ… [Phys. Rev. C 92, 014627] Published Wed Jul 29, 2015

Schlagwort(e): Nuclear Reactions

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Measurement of the ^{97} Mo(n,γ) reaction with the DANCE γ calorimeter array (2015)

C. L. Walker, M. Krtička, B. Baramsai, F. Bečvář, T. A. Bredeweg, A. Chyzh, R. C. Haight, M. Jandel, J. Kroll, G. E. Mitchell, J. M. O'Donnell, R. S. Rundberg, J. L. Ullmann, S. Valenta, and J. B. Wilhelmy

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-07-30

Beschreibung: Author(s): C. L. Walker, M. Krtička, B. Baramsai, F. Bečvář, T. A. Bredeweg, A. Chyzh, R. C. Haight, M. Jandel, J. Kroll, G. E. Mitchell, J. M. O'Donnell, R. S. Rundberg, J. L. Ullmann, S. Valenta, and J. B. Wilhelmy Spectra of γ rays following the Mo 97 ( n , γ ) reaction were measured as a function of incident neutron energy with the DANCE (Detector for Advanced Neutron Capture Experiments) array of 160 BaF 2 scintillation detectors at the Los Alamos Neutron Science Center using an enriched Mo 97 target. These spectra… [Phys. Rev. C 92, 014324] Published Wed Jul 29, 2015

Schlagwort(e): Nuclear Structure

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Timetable Design for Urban Rail Line with Capacity Constraints (2015)

Yu-Ting Zhu, Bao-Hua Mao, Lu Liu, and Ming-Gao Li

Hindawi

In: Discrete Dynamics in Nature and Society

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Publikationsdatum: 2015-08-04

Beschreibung: To design an efficient and economical timetable for a heavily congested urban rail corridor, a scheduling model is proposed in this paper. The objective of the proposed model is to find the departure time of trains at the start terminal to minimize the system cost, which includes passenger waiting cost and operating cost. To evaluate the performance of the timetable, a simulation model is developed to simulate the detailed movements of passengers and trains with strict constraints of station and train capacities. It assumes that passengers who arrive early will have more chances to access a station and board a train. The accessing and boarding processes of passengers are all based on a first-come-first-serve basis. When a station is full, passengers unable to access must wait outside until the number of waiting passengers at platform falls below a given value. When a train is full, passengers unable to board must wait at the platform for the next train to arrive. Then, based on the simulation results, a two-stage genetic algorithm is introduced to find the best timetable. Finally, a numerical example is given to demonstrate the effectiveness of the proposed model and solution method.

Print ISSN: 1026-0226

Digitale ISSN: 1607-887X

Thema: Mathematik

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Big Data-Driven Based Real-Time Traffic Flow State Identification and Prediction (2015)

Hua-pu Lu, Zhi-yuan Sun, and Wen-cong Qu

Hindawi

In: Discrete Dynamics in Nature and Society

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Publikationsdatum: 2015-08-04

Beschreibung: With the rapid development of urban informatization, the era of big data is coming. To satisfy the demand of traffic congestion early warning, this paper studies the method of real-time traffic flow state identification and prediction based on big data-driven theory. Traffic big data holds several characteristics, such as temporal correlation, spatial correlation, historical correlation, and multistate. Traffic flow state quantification, the basis of traffic flow state identification, is achieved by a SAGA-FCM (simulated annealing genetic algorithm based fuzzy c-means) based traffic clustering model. Considering simple calculation and predictive accuracy, a bilevel optimization model for regional traffic flow correlation analysis is established to predict traffic flow parameters based on temporal-spatial-historical correlation. A two-stage model for correction coefficients optimization is put forward to simplify the bilevel optimization model. The first stage model is built to calculate the number of temporal-spatial-historical correlation variables. The second stage model is present to calculate basic model formulation of regional traffic flow correlation. A case study based on a real-world road network in Beijing, China, is implemented to test the efficiency and applicability of the proposed modeling and computing methods.

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Thema: Mathematik

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A Pest Management Model with Stage Structure and Impulsive State Feedback Control (2015)

Guoping Pang, Zhiqing Liang, Weijian Xu, Lijie Li, and Gang Fu

Hindawi

In: Discrete Dynamics in Nature and Society

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Publikationsdatum: 2015-08-04

Beschreibung: A pest management model with stage structure and impulsive state feedback control is investigated. We get the sufficient condition for the existence of the order-1 periodic solution by differential equation geometry theory and successor function. Further, we obtain a new judgement method for the stability of the order-1 periodic solution of the semicontinuous systems by referencing the stability analysis for limit cycles of continuous systems, which is different from the previous method of analog of Poincarè criterion. Finally, we analyze numerically the theoretical results obtained.

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Thema: Mathematik

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Can Tsallis Distribution Fit All the Particle Spectra Produced at RHIC and LHC? (2015)

H. Zheng and Lilin Zhu

Hindawi

In: Advances in High Energy Physics

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Publikationsdatum: 2015-07-30

Beschreibung: The Tsallis distribution has been tested to fit all the particle spectra at mid-rapidity from central events produced in d + Au, Cu + Cu, and Au + Au collisions at RHIC and p + Pb, Pb + Pb collisions at LHC. Even though there are strong medium effects in Cu + Cu and Au + Au collisions, the results show that the Tsallis distribution can be used to fit most of particle spectra in the collisions studied except in Au + Au collisions where some deviations are seen for proton and at low . In addition, as the Tsallis distribution can only fit part of the particle spectra produced in Pb + Pb collisions where is up to 20 GeV/c, a new formula with one more fitting degree of freedom is proposed in order to reproduce the entire region.

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Quarkonium dissociation at finite chemical potential (2015)

Uttam Kakade and Binoy Krishna Patra

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-06

Beschreibung: Author(s): Uttam Kakade and Binoy Krishna Patra We have studied the dissociation of quarkonia states in a deconfined medium of quarks and gluons at the large baryon chemical potential and small temperature region. The aim of this study is to probe the dense baryonic medium expected to be produced at the Facility for Anti-proton and Ion Research, … [Phys. Rev. C 92, 024901] Published Tue Aug 04, 2015

Schlagwort(e): Relativistic Nuclear Collisions

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16

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Thermal properties of hot and dense matter with finite range interactions (2015)

Constantinos Constantinou, Brian Muccioli, Madappa Prakash, and James M. Lattimer

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-06

Beschreibung: Author(s): Constantinos Constantinou, Brian Muccioli, Madappa Prakash, and James M. Lattimer We explore the thermal properties of hot and dense matter using a model that reproduces the empirical properties of isospin symmetric and asymmetric bulk nuclear matter, optical-model fits to nucleon-nucleus scattering data, heavy-ion flow data in the energy range 0.5–2 GeV/ A , and the largest well-m… [Phys. Rev. C 92, 025801] Published Wed Aug 05, 2015

Schlagwort(e): Nuclear Astrophysics

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17

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Systematics of α-decay transitions to excited states (2015)

D. S. Delion and A. Dumitrescu

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-06

Beschreibung: Author(s): D. S. Delion and A. Dumitrescu We systematize the available experimental material concerning α -decay transitions to low-lying excited states in even-even and odd-mass emitters. We generalize our previous theoretical prediction concerning the linear dependence between hindrance factors and the excitation energy for transitions in … [Phys. Rev. C 92, 021303(R)] Published Tue Aug 04, 2015

Schlagwort(e): Nuclear Structure

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Isotopic molybdenum total neutron cross section in the unresolved resonance region (2015)

R. Bahran, D. Barry, R. Block, G. Leinweber, M. Rapp, A. Daskalakis, E. Blain, D. Williams, B. McDermott, L. Leal, and Y. Danon

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-06

Beschreibung: Author(s): R. Bahran, D. Barry, R. Block, G. Leinweber, M. Rapp, A. Daskalakis, E. Blain, D. Williams, B. McDermott, L. Leal, and Y. Danon Accurate isotopic molybdenum nuclear data are important because molybdenum can exist in nuclear reactor components including fuel, cladding, or as a high yield fission product. High-resolution time-of-flight neutron transmission measurements on highly enriched isotopic metallic samples of Mo 95 , Mo 96 … [Phys. Rev. C 92, 024601] Published Tue Aug 04, 2015

Schlagwort(e): Nuclear Reactions

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Strange and nonstrange baryon spectra in the relativistic interacting quark-diquark model with a Gürsey and Radicati-inspired exchange interaction (2015)

E. Santopinto and J. Ferretti

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-06

Beschreibung: Author(s): E. Santopinto and J. Ferretti The relativistic interacting quark-diquark model, constructed in the framework of point form dynamics, is extended to strange baryons. The strange and nonstrange baryon spectra are calculated and compared with the experimental data. [Phys. Rev. C 92, 025202] Published Tue Aug 04, 2015

Schlagwort(e): Hadronic Physics and QCD

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Estimate of the theoretical uncertainty of the cross sections for nucleon knockout in neutral-current neutrino-oxygen interactions (2015)

Artur M. Ankowski, Maria B. Barbaro, Omar Benhar, Juan A. Caballero, Carlotta Giusti, Raúl González-Jiménez, Guillermo D. Megias, and Andrea Meucci

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-07

Beschreibung: Author(s): Artur M. Ankowski, Maria B. Barbaro, Omar Benhar, Juan A. Caballero, Carlotta Giusti, Raúl González-Jiménez, Guillermo D. Megias, and Andrea Meucci Free nucleons propagating in water are known to produce γ rays, which form a background to the searches for diffuse supernova neutrinos and sterile neutrinos carried out with Cherenkov detectors. As a consequence, the process of nucleon knockout induced by neutral-current quasielastic interactions o… [Phys. Rev. C 92, 025501] Published Thu Aug 06, 2015

Schlagwort(e): Electroweak Interaction, Symmetries

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Neutron stars in the Bogomol'nyi-Prasad-Sommerfield Skyrme model: Mean-field limit versus full field theory (2015)

C. Adam, C. Naya, J. Sanchez-Guillen, R. Vazquez, and A. Wereszczynski

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-08

Beschreibung: Author(s): C. Adam, C. Naya, J. Sanchez-Guillen, R. Vazquez, and A. Wereszczynski Using a solitonic model of nuclear matter, the Bogomol'nyi-Prasad-Sommerfield (BPS) Skyrme model, we compare neutron stars obtained in the full field theory, where gravitational backreaction is completely taken into account, with calculations in a mean-field approximation using the Tolman-Oppenheime… [Phys. Rev. C 92, 025802] Published Fri Aug 07, 2015

Schlagwort(e): Nuclear Astrophysics

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Extracting the mass dependence and quantum numbers of short-range correlated pairs from A(e,e^{′} p) and A(e,e^{′} pp) scattering (2015)

C. Colle, O. Hen, W. Cosyn, I. Korover, E. Piasetzky, J. Ryckebusch, and L. B. Weinstein

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-08

Beschreibung: Author(s): C. Colle, O. Hen, W. Cosyn, I. Korover, E. Piasetzky, J. Ryckebusch, and L. B. Weinstein The nuclear mass dependence of the number of short-range correlated (SRC) proton-proton ( p p ) and proton-neutron ( p n ) pairs in nuclei is a sensitive probe of the dynamics of short-range pairs in the ground state of atomic nuclei. This work presents an analysis of electroinduced single-proton and two-… [Phys. Rev. C 92, 024604] Published Thu Aug 06, 2015

Schlagwort(e): Nuclear Reactions

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Low-energy excitations and quasielastic contribution to electron-nucleus and neutrino-nucleus scattering in the continuum random-phase approximation (2015)

V. Pandey, N. Jachowicz, T. Van Cuyck, J. Ryckebusch, and M. Martini

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-08

Beschreibung: Author(s): V. Pandey, N. Jachowicz, T. Van Cuyck, J. Ryckebusch, and M. Martini We present a detailed study of a continuum random-phase approximation approach to quasielastic electron-nucleus and neutrino-nucleus scattering. We compare the ( e , e ′ ) cross-section predictions with electron scattering data for the nuclear targets C 12 , O 16 , and Ca 40 , in the kinematic region where qua… [Phys. Rev. C 92, 024606] Published Fri Aug 07, 2015

Schlagwort(e): Nuclear Reactions

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Novel technique to extract experimental symmetry free energy information for nuclear matter (2015)

J. Mabiala, H. Zheng, A. Bonasera, P. Cammarata, K. Hagel, L. Heilborn, Z. Kohley, L. W. May, A. B. McIntosh, M. D. Youngs, A. Zarrella, and S. J. Yennello

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-08

Beschreibung: Author(s): J. Mabiala, H. Zheng, A. Bonasera, P. Cammarata, K. Hagel, L. Heilborn, Z. Kohley, L. W. May, A. B. McIntosh, M. D. Youngs, A. Zarrella, and S. J. Yennello A new method of accessing information on the symmetry free energy from yields of fragments produced in Fermi-energy heavy-ion collisions is proposed. Furthermore, by means of quantum fluctuation analysis techniques, correlations between extracted symmetry free energy coefficients with temperature an… [Phys. Rev. C 92, 024605] Published Fri Aug 07, 2015

Schlagwort(e): Nuclear Reactions

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High-precision half-life measurements for the superallowed Fermi β^{+} emitter ^{18} Ne (2015)

A. T. Laffoley et al.

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-08

Beschreibung: Author(s): A. T. Laffoley et al. The half-life of the superallowed Fermi β + emitter Ne 18 has been determined via two high-precision β counting experiments at TRIUMF's Isotope Separator and Accelerator facility. Using two different 4 π continuous-flow gas-proportional counters, two independent measurements were made, yielding a weigh… [Phys. Rev. C 92, 025502] Published Thu Aug 06, 2015

Schlagwort(e): Electroweak Interaction, Symmetries

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K^{*} (892)^{+} production in proton-proton collisions at E_{beam} =3.5 GeV (2015)

G. Agakishiev et al. (HADES Collaboration)

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-08

Beschreibung: Author(s): G. Agakishiev et al. (HADES Collaboration) We present results on the K * ( 892 ) + production in proton-proton collisions at a beam energy of E = 3.5 GeV, which is hitherto the lowest energy at which this mesonic resonance has been observed in nucleon-nucleon reactions. The data are interpreted within a two-channel model that includes the three-bod… [Phys. Rev. C 92, 024903] Published Thu Aug 06, 2015

Schlagwort(e): Relativistic Nuclear Collisions

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Stochastic Synchronization of Neutral-Type Neural Networks with Multidelays Based on -Matrix (2015)

Wuneng Zhou, Xueqing Yang, Jun Yang, and Jun Zhou

Hindawi

In: Discrete Dynamics in Nature and Society

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Publikationsdatum: 2015-08-18

Beschreibung: The problem of stochastic synchronization of neutral-type neural networks with multidelays based on -matrix is researched. Firstly, we designed a control law of stochastic synchronization of the neural-type and multiple time-delays neural network. Secondly, by making use of Lyapunov functional and -matrix method, we obtained a criterion under which the drive and response neutral-type multiple time-delays neural networks with stochastic disturbance and Markovian switching are stochastic synchronization. The synchronization condition is expressed as linear matrix inequality which can be easily solved by MATLAB. Finally, we introduced a numerical example to illustrate the effectiveness of the method and result obtained in this paper.

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Level of Service Analysis Based on Maximum Number of Passengers in Waiting Room of Railway Passenger Station Using Arena Simulation (2015)

Bo Yang, Xuedong Yan, and Dahai Guo

Hindawi

In: Discrete Dynamics in Nature and Society

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Publikationsdatum: 2015-08-18

Beschreibung: The level of service is an important aspect of the operation and management at a railway passenger station. Particularly, the level of service in waiting room (LOSWR) is one of the most important influential factors in deciding passengers’ satisfaction. This paper proposes a model for finding the LOSWR based on the maximum number of passengers, and an Arena simulation model that simulates passengers’ aggregation behaviors in the waiting room is presented for analyzing the LOSWR. Through the simulation, we demonstrate how the passenger advanced arrival time and the accompany rate influence the maximum number of passengers and the LOSWR. In addition, the simulation also illustrates the effect utilities and the priority of different measures that can be used to improve the LOSWR. In detail, the simulation results demonstrate that the passenger advanced arrival time and advanced check-out time have much stronger effect utilities on the maximum number of passengers and the LOSWR than other discussed factors. The simulation suggests that the Arena is an effective simulation platform for analyzing complex passengers-related behaviors at railway passenger station.

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Triplet energy differences and the low lying structure of ^{62} Ga (2015)

T. W. Henry et al.

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-21

Beschreibung: Author(s): T. W. Henry et al. Background: Triplet energy differences (TED) can be studied to yield information on isospin-non-conserving interactions in nuclei. Purpose: The systematic behavior of triplet energy differences (TED) of T = 1 , J π = 2 + states is examined. The A = 62 isobar is identified as having a TED value that deviates … [Phys. Rev. C 92, 024315] Published Thu Aug 20, 2015

Schlagwort(e): Nuclear Structure

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Limitation of multiparticle correlations for studying the event-by-event distribution of harmonic flow in heavy-ion collisions (2015)

Jiangyong Jia and Sooraj Radhakrishnan

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-21

Beschreibung: Author(s): Jiangyong Jia and Sooraj Radhakrishnan The sensitivity of flow harmonics from cumulants to the event-by-event flow distribution p ( v n ) is investigated using a simple central moment expansion approach. For a narrow distribution whose width is much smaller than the mean σ n ≪ 〈 v n 〉 , the differences between the first three higher-order cumulant … [Phys. Rev. C 92, 024911] Published Thu Aug 20, 2015

Schlagwort(e): Relativistic Nuclear Collisions

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Analysis of Traffic Conditions in Urban Region Based on Data from Fixed Detectors (2015)

Shidong Liang, Shuzhi Zhao, Minghui Ma, and Huasheng Liu

Hindawi

In: Discrete Dynamics in Nature and Society

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Publikationsdatum: 2015-08-24

Beschreibung: To evaluate traffic conditions in an urban region, the average travel speed in the street network and the average traffic flow per lane are selected as indexes. The results for identifying traffic conditions are obtained using macroscopic fundamental diagram. Because of the difficulty of collecting the traffic parameter of travel speed from widely distributed fixed detectors directly, in this paper, the relationship between average travel speed and queue lengths at signalized intersections within the urban area is established based on an equivalent assumption. Finally, the average travel speed estimation model proposed in this paper is tested with microscopic simulation platform, and the results showed that the average travel speed estimation model performed well with satisfactory accuracy. In addition, the best performance of the network efficiency can be identified based on the reflections of macroscopic fundamental diagram, and the evaluation system is simple enough for application in engineering. Therefore, the result is instructive both for generating traffic control strategies and for making route choices.

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Microscopic dynamical description of proton-induced fission with the constrained molecular dynamics model (2015)

N. Vonta, G. A. Souliotis, M. Veselsky, and A. Bonasera

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-25

Beschreibung: Author(s): N. Vonta, G. A. Souliotis, M. Veselsky, and A. Bonasera The microscopic description of nuclear fission still remains a topic of intense basic research. Understanding nuclear fission, apart from a theoretical point of view, is of practical importance for energy production and the transmutation of nuclear waste. In nuclear astrophysics, fission sets the up… [Phys. Rev. C 92, 024616] Published Mon Aug 24, 2015

Schlagwort(e): Nuclear Reactions

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Quantifying truncation errors in effective field theory (2015)

R. J. Furnstahl, N. Klco, D. R. Phillips, and S. Wesolowski

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-19

Beschreibung: Author(s): R. J. Furnstahl, N. Klco, D. R. Phillips, and S. Wesolowski Bayesian procedures designed to quantify truncation errors in perturbative calculations of quantum chromodynamics observables are adapted to expansions in effective field theory (EFT). In the Bayesian approach, such truncation errors are derived from degree-of-belief (DOB) intervals for EFT predicti… [Phys. Rev. C 92, 024005] Published Tue Aug 18, 2015

Schlagwort(e): Nucleon-Nucleon Interaction, Few-Body Systems

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Centrality and system-size dependencies of temperatures of soft and hard components of p_{t} distributions of negative pions in ^{4} He+ ^{12} C, ^{12} C+ ^{12} C, and ^{12} C+ ^{181} Ta collisions at sqrt[s_{NN} ] =3.14GeV (2015)

Kh. K. Olimov, Akhtar Iqbal, Mahnaz Q. Haseeb, S. L. Lutpullaev, and B. S. Yuldashev

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-19

Beschreibung: Author(s): Kh. K. Olimov, Akhtar Iqbal, Mahnaz Q. Haseeb, S. L. Lutpullaev, and B. S. Yuldashev Collision centrality as well as the system-size dependencies of the temperatures of the soft ( p t = 0.1 − 0.5 GeV / c ) and hard ( p t = 0.5 − 1.2 GeV / c ) components of the experimental transverse momentum distributions of the negative pions produced in He 4 + 12 C , C 12 + 12 C , and C 12 + 181 Ta collisions at 4.2 A GeV / c ( s N N = 3.… [Phys. Rev. C 92, 024909] Published Tue Aug 18, 2015

Schlagwort(e): Relativistic Nuclear Collisions

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Consensus for Discrete-Time Multiagent Systems (2015)

Xiaoping Wang and Jinliang Shao

Hindawi

In: Discrete Dynamics in Nature and Society

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Publikationsdatum: 2015-08-19

Beschreibung: An consensus problem of multiagent systems is studied by introducing disturbances into the systems. Based on control theory and consensus theory, a condition is derived to guarantee the systems both reach consensus and have a certain property. Finally, an example is worked out to demonstrate the effectiveness of the theoretical results.

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Nonlinear Dynamics, Fixed Points and Coupled Fixed Points in Generalized Gauge Spaces with Applications to a System of Integral Equations (2015)

Adrian Petruşel and Gabriela Petruşel

Hindawi

In: Discrete Dynamics in Nature and Society

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Publikationsdatum: 2015-08-20

Beschreibung: We will discuss discrete dynamics generated by single-valued and multivalued operators in spaces endowed with a generalized metric structure. More precisely, the behavior of the sequence of successive approximations in complete generalized gauge spaces is discussed. In the same setting, the case of multivalued operators is also considered. The coupled fixed points for mappings and are discussed and an application to a system of nonlinear integral equations is given.

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Impact of the energy-loss spatial profile and shear-viscosity to entropy-density ratio for the Mach cone versus head-shock signals produced by a fast-moving parton in a quark-gluon plasma (2015)

Alejandro Ayala, Jorge David Castaño-Yepes, Isabel Dominguez, and Maria Elena Tejeda-Yeomans

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-20

Beschreibung: Author(s): Alejandro Ayala, Jorge David Castaño-Yepes, Isabel Dominguez, and Maria Elena Tejeda-Yeomans We compute the energy and momentum deposited by a fast-moving parton in a quark-gluon plasma using linear viscous hydrodynamics with an energy loss per unit length profile proportional to the path length and with different values of the shear-viscosity to entropy-density ratio. We show that when var… [Phys. Rev. C 92, 024910] Published Wed Aug 19, 2015

Schlagwort(e): Relativistic Nuclear Collisions

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A Time Discontinuous Galerkin Finite Element Method for Quasi-Linear Sobolev Equations (2015)

Hong Yu and Tongjun Sun

Hindawi

In: Discrete Dynamics in Nature and Society

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Publikationsdatum: 2015-08-21

Beschreibung: We present a time discontinuous Galerkin finite element scheme for quasi-linear Sobolev equations. The approximate solution is sought as a piecewise polynomial of degree in time variable at most with coefficients in finite element space. This piecewise polynomial is not necessarily continuous at the nodes of the partition for the time interval. The existence and uniqueness of the approximate solution are proved by use of Brouwer’s fixed point theorem. An optimal -norm error estimate is derived. Just because of a damping term included in quasi-linear Sobolev equations, which is the distinct character different from parabolic equation, more attentions are paid to this term in the study. This is the significance of this paper.

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Electric quadrupole and magnetic dipole moments of odd nuclei near the magic ones in a self-consistent approach (2015)

G. Co', V. De Donno, M. Anguiano, R. N. Bernard, and A. M. Lallena

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-21

Beschreibung: Author(s): G. Co', V. De Donno, M. Anguiano, R. N. Bernard, and A. M. Lallena We present a model which describes the properties of odd-even nuclei with one nucleon more, or less, with respect to the magic number. In addition to the effects related to the unpaired nucleon, we consider those produced by the excitation of the closed shell core. By using a single-particle basis g… [Phys. Rev. C 92, 024314] Published Thu Aug 20, 2015

Schlagwort(e): Nuclear Structure

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Energy-dependent fragmentation cross sections of relativistic ^{12} C (2015)

T. Ogawa, T. Sato, S. Hashimoto, D. Satoh, S. Tsuda, and K. Niita

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-21

Beschreibung: Author(s): T. Ogawa, T. Sato, S. Hashimoto, D. Satoh, S. Tsuda, and K. Niita The fragment production excitation functions of C 12 interacting with carbon nuclei were measured in the energy range of 100–400 MeV/u. To measure cross sections as excitation functions, fragments produced from a thick carbon target bombarded with a monoenergetic C 12 ion beam were detected by a teles… [Phys. Rev. C 92, 024614] Published Thu Aug 20, 2015

Schlagwort(e): Nuclear Reactions

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Direct and compound-nucleus reaction mechanisms in the ^{7} Be+ ^{58} Ni system at near-barrier energies (2015)

M. Mazzocco et al.

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-21

Beschreibung: Author(s): M. Mazzocco et al. The energy and angular distributions of He 3 and He 4 ions produced in the Be 7 + Ni 58 reaction at a bombarding energy of 22 MeV have been measured for the first time. The yield of the heavier helium isotope was four to five times more abundant than that of its lighter counterpart, ruling out the possibi… [Phys. Rev. C 92, 024615] Published Thu Aug 20, 2015

Schlagwort(e): Nuclear Reactions

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Isoscalar response of ^{68} Ni to α-particle and deuteron probes (2015)

M. Vandebrouck et al.

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-22

Beschreibung: Author(s): M. Vandebrouck et al. Giant resonances are fundamental excitations of the entire atomic nucleus. This work reports the discovery of several collective isoscalar modes in the unstable neutron-rich nucleus 68 Ni. Such modes are sensitive to the bulk properties of nuclear matter, e.g., how easily nuclear matter can be compressed. The work uses a novel technique with an “active” gas target, in which target and detector are the same. Comparison with lighter nickel isotopes sheds light on how these collective excitations evolve with increasing proton-neutron asymmetry. The experience gained in this work suggests future improvements for the experimental technique. [Phys. Rev. C 92, 024316] Published Fri Aug 21, 2015

Schlagwort(e): Nuclear Structure

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Lifetime measurement for the 2_{1}^{+} state in ^{140} Sm and the onset of collectivity in neutron-deficient Sm isotopes (2015)

F. L. Bello Garrote, A. Görgen, J. Mierzejewski, C. Mihai, J. P. Delaroche, M. Girod, J. Libert, E. Sahin, J. Srebrny, T. Abraham, T. K. Eriksen, F. Giacoppo, T. W. Hagen, M. Kisielinski, M. Klintefjord, M. Komorowska, M. Kowalczyk, A. C. Larsen, T. Marchlewski, I. O. Mitu, S. Pascu, S. Siem, A. Stolarz, and T. G. Tornyi

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-22

Beschreibung: Author(s): F. L. Bello Garrote, A. Görgen, J. Mierzejewski, C. Mihai, J. P. Delaroche, M. Girod, J. Libert, E. Sahin, J. Srebrny, T. Abraham, T. K. Eriksen, F. Giacoppo, T. W. Hagen, M. Kisielinski, M. Klintefjord, M. Komorowska, M. Kowalczyk, A. C. Larsen, T. Marchlewski, I. O. Mitu, S. Pascu, S. Siem, A. Stolarz, and T. G. Tornyi Background: The chain of Sm isotopes exhibits a wide range of nuclear shapes and collective behavior. While the onset of deformation for N 〉 82 has been well studied both experimentally and theoretically, fundamental data is lacking for some Sm isotopes with N 〈 82 . Purpose: Electromagnetic transi… [Phys. Rev. C 92, 024317] Published Fri Aug 21, 2015

Schlagwort(e): Nuclear Structure

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J=3/2 charmed hypertriton (2015)

H. Garcilazo, A. Valcarce, and T. F. Caramés

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-25

Beschreibung: Author(s): H. Garcilazo, A. Valcarce, and T. F. Caramés By solving exact three-body equations, we study the three-baryon system with charm + 1 . We look for possible bound states using baryon-baryon interactions obtained from a chiral constituent quark model. The smaller effect of the Λ c ↔ Σ c conversion reverses the order of the ( I , J ) = ( 0 , 1 / 2 ) and ( I , J ) = ( 0 , 3 / … [Phys. Rev. C 92, 024006] Published Mon Aug 24, 2015

Schlagwort(e): Nucleon-Nucleon Interaction, Few-Body Systems

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Measurements of dielectron production in Au + Au collisions at sqrt[s_{NN} ] =200 GeV from the STAR experiment (2015)

L. Adamczyk et al. (STAR Collaboration)

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-25

Beschreibung: Author(s): L. Adamczyk et al. (STAR Collaboration) We report on measurements of dielectron ( e + e − ) production in Au + Au collisions at a center-of-mass energy of 200 GeV per nucleon-nucleon pair using the STAR detector at BNL Relativistic Heavy Ion Collider. Systematic measurements of the dielectron yield as a function of transverse momentum ( p T ) and c… [Phys. Rev. C 92, 024912] Published Mon Aug 24, 2015

Schlagwort(e): Relativistic Nuclear Collisions

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Scattering State of Klein-Gordon Particles by -Parameter Hyperbolic Poschl-Teller Potential (2015)

Akpan Ndem Ikot, Hillary P. Obong, Israel O. Owate, Michael C. Onyeaju, and Hassan Hassanabadi

Hindawi

In: Advances in High Energy Physics

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Publikationsdatum: 2015-08-10

Beschreibung: The one-dimensional Klein-Gordon equation for equal vector and scalar -parameter hyperbolic Poschl-Teller potential is solved in terms of the hypergeometric functions. We calculate in detail the solutions of the scattering and bound states. By virtue of the conditions of equation of continuity of the wave functions, we obtained explicit expressions for the reflection and transmission coefficients and energy equation for the bound state solutions.

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Cavitation in a quark gluon plasma with finite chemical potential and several transport coefficients (2015)

S. M. Sanches, Jr., D. A. Fogaça, F. S. Navarra, and H. Marrochio

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-13

Beschreibung: Author(s): S. M. Sanches, Jr., D. A. Fogaça, F. S. Navarra, and H. Marrochio We study the effects of a finite chemical potential on the occurrence of cavitation in a quark gluon plasma (QGP). We solve the evolution equations of second-order viscous relativistic hydrodynamics using two equations of state. The first one was derived in lattice QCD and represents QGP at zero che… [Phys. Rev. C 92, 025204] Published Wed Aug 12, 2015

Schlagwort(e): Hadronic Physics and QCD

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Fission fragment mass distributions in ^{35} Cl+ ^{144,154} Sm reactions (2015)

R. Tripathi, S. Sodaye, K. Sudarshan, B. K. Nayak, A. Jhingan, P. K. Pujari, K. Mahata, S. Santra, A. Saxena, E. T. Mirgule, and R. G. Thomas

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-13

Beschreibung: Author(s): R. Tripathi, S. Sodaye, K. Sudarshan, B. K. Nayak, A. Jhingan, P. K. Pujari, K. Mahata, S. Santra, A. Saxena, E. T. Mirgule, and R. G. Thomas Background: A new type of asymmetric fission was observed in β -delayed fission of Tl 180 [ Phys. Rev. Lett. 105 , 252502 (2010) ] as symmetric mass distribution would be expected based on conventional shell effects leading to the formation of N = 50 fragments. Following this observation, theoretical calcu… [Phys. Rev. C 92, 024610] Published Wed Aug 12, 2015

Schlagwort(e): Nuclear Reactions

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Quarkonia suppression in PbPb collisions at sqrt[s_{NN} ] =2.76 TeV (2015)

Vineet Kumar, Prashant Shukla, and Ramona Vogt

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-15

Beschreibung: Author(s): Vineet Kumar, Prashant Shukla, and Ramona Vogt We estimate the modification of quarkonia yields due to different processes in the medium produced in PbPb collisions at LHC energy. The quarkonia and heavy flavor cross sections calculated up to next-to-leading order (NLO) are used in the study. Shadowing corrections are obtained with the NLO EPS09… [Phys. Rev. C 92, 024908] Published Fri Aug 14, 2015

Schlagwort(e): Relativistic Nuclear Collisions

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Effects of electron screening on α-decay half-lives in different external environments (2015)

Niu Wan (万牛), Chang Xu (许昌), and Zhongzhou Ren (任中洲)

American Physical Society (APS)

In: Physical Review C

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Beschreibung: Author(s): Niu Wan (万牛), Chang Xu (许昌), and Zhongzhou Ren (任中洲) In this paper, the electron screening effects on α -decay half-lives are investigated in different external environments, including α decays in neutral atoms, in metal, and in extremely strong magnetic-field environments. Systematic calculations of α -decay half-lives are performed for α emitters with… [Phys. Rev. C 92, 024301] Published Mon Aug 03, 2015

Schlagwort(e): Nuclear Structure

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New decay scheme of the _{51} ^{136} Sb _{85} 6^{−} isomer (2015)

R. Lozeva et al.

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-04

Beschreibung: Author(s): R. Lozeva et al. We report new data on the Sb 136 6 − yrast isomer with T 1 / 2 = 489 ( 40 ) μ s and π g 7 / 2 1 × ν f 7 / 2 3 configuration, populated in the projectile fission of U 238 on a Be 9 target. The analysis confirms the lifetime, providing a good accuracy measurement. In addition, the decay of the isomer to the ground state is new… [Phys. Rev. C 92, 024304] Published Mon Aug 03, 2015

Schlagwort(e): Nuclear Structure

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Evolution of ground-state quadrupole and octupole stiffnesses in even-even barium isotopes (2015)

Hua-Lei Wang, Jie Yang, Min-Liang Liu, and Fu-Rong Xu

American Physical Society (APS)

In: Physical Review C

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Beschreibung: Author(s): Hua-Lei Wang, Jie Yang, Min-Liang Liu, and Fu-Rong Xu Quadrupole and octupole stiffnesses in the ground states of even-even Ba 112 − 150 isotopes have been systematically investigated by means of potential-energy-surface calculations. The calculations are carried out in both ( β 2 , γ , β 4 ) and ( β 2 , β 3 , β 4 , β 5 ) deformation spaces with the inclusion of triaxial and… [Phys. Rev. C 92, 024303] Published Mon Aug 03, 2015

Schlagwort(e): Nuclear Structure

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Recycler Reaction for the Government Behavior in Closed-Loop Supply Chain Distribution Network: Based on the System Dynamics (2015)

Xi gang Yuan and Xiao qing Zhang

Hindawi

In: Discrete Dynamics in Nature and Society

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Publikationsdatum: 2015-08-04

Beschreibung: With system dynamics, we establish three-closed-loop supply chain distribution network system model which consists of supplier, manufacturer, two retailers, and products (parts) recycler. We proposed that recycler make reflect for the government policy by adjusting the recycling ratio and recycling delay. We use vensim software to simulate this model and investigate how the products (parts) recyclers behavior influences the loop supply chain distribution system. The result shows that (1) when recyclers respond positively to government policies, recycling will increase the proportion of recyclers. When recyclers respond negatively to government policy making, recycling will reduce the proportion of recyclers. (2) When the recovery percentage of recyclers improves, manufacturers, Retailer 1, and Retailer 2 quantity fluctuations will reduce and the bullwhip effect will diminish. (3) When the proportion of recycled parts recyclers is lowered, manufacturers, Retailer 1, and Retailer 2 inventory fluctuation will increase and the bullwhip effect will be enhanced. (4) When recyclers recycling product delays increased, volatility manufacturers order quantity will rise, but there is little change in the amount of fluctuation of orders of the two retailers. (5) When recycling parts recyclers delay increases, fluctuations in the supplier order quantity will rise, but there is little change in the amount of fluctuation of orders of the two retailers.

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Thema: Mathematik

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Existence of Solutions for Boundary Value Problem of a Caputo Fractional Difference Equation (2015)

Zhiping Liu, Shugui Kang, Huiqin Chen, Jianmin Guo, Yaqiong Cui, and Caixia Guo

Hindawi

In: Discrete Dynamics in Nature and Society

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Publikationsdatum: 2015-08-05

Beschreibung: We investigate the existence of solutions for a Caputo fractional difference equation boundary value problem. We use Schauder fixed point theorem to deduce the existence of solutions. The proofs are based upon the theory of discrete fractional calculus. We also provide some examples to illustrate our main results.

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Advanced Dynamic Simulations in Transportation (2015)

Wei Guan, Xuedong Yan, Essam Radwan, Sze Chun Wong, and Xiaoliang Ma

Hindawi

In: Discrete Dynamics in Nature and Society

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Publikationsdatum: 2015-08-06

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Contribution of two-particle–two-hole final states to the nuclear response (2015)

Omar Benhar, Alessandro Lovato, and Noemi Rocco

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-07

Beschreibung: Author(s): Omar Benhar, Alessandro Lovato, and Noemi Rocco The excitation of two-particle–two-hole final states in neutrino-nucleus scattering has been advocated by many authors as the source of the excess cross section observed by the MiniBooNE Collaboration in the quasielastic sector. We analyze the mechanisms leading to the appearance of these final stat… [Phys. Rev. C 92, 024602] Published Thu Aug 06, 2015

Schlagwort(e): Nuclear Reactions

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Imaginary-time formalism for triple-α reaction rates (2015)

T. Akahori, Y. Funaki, and K. Yabana

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-08

Beschreibung: Author(s): T. Akahori, Y. Funaki, and K. Yabana Using imaginary-time formalism, it is shown that the triple- α reaction rate can be reliably calculated without the need to solve scattering problems involving three charged particles. The calculated reaction rate is found to agree well with the empirical NACRE rate, which is widely adopted in stella… [Phys. Rev. C 92, 022801(R)] Published Fri Aug 07, 2015

Schlagwort(e): Nuclear Astrophysics

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Hybrid Dynamic Network Data Envelopment Analysis (2015)

Ling Li and Fengshan Wang

Hindawi

In: Discrete Dynamics in Nature and Society

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Publikationsdatum: 2015-06-05

Beschreibung: Conventional DEA models make no hypothesis concerning the internal operations in a static situation. To open the “black box” and work with dynamic assessment issues synchronously, we put forward a hybrid model for evaluating the relative efficiencies of a set of DMUs over an observed time period with a composite of network DEA and dynamic DEA. We vertically deal with intermediate products between divisions with assignable inputs in the network structure and, horizontally, we extend network structure by means of a dynamic pattern with unrelated activities between two succeeding periods. The hybrid dynamic network DEA model proposed in this paper enables us to (i) pry into the internal operations of DEA by another network structure, (ii) obtain dynamic change of period efficiency, and (iii) gain the overall dynamic efficiency of DMUs over the entire observed periods. We finally illustrate the calculation procedure of the proposed approach by a numerical example.

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Existence and Convergence of the Positive Solutions of a Discrete Epidemic Model (2015)

Zhijian Wei and Meitao Le

Hindawi

In: Discrete Dynamics in Nature and Society

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Publikationsdatum: 2015-06-05

Beschreibung: We consider a class of system of nonlinear difference equations arising from mathematical models describing a discrete epidemic model. Sufficient conditions are established that guarantee the existence of positive solutions, the existence of a unique nonnegative equilibrium, and the convergence of the positive solutions to the nonnegative equilibrium of the system of difference equations. The obtained results are new and they complement previously known results.

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New formulas for the (−2) moment of the photoabsorption cross section, σ_{−2} (2015)

J. N. Orce

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-06-06

Beschreibung: Author(s): J. N. Orce Two new formulas for the ( − 2 ) moment of the photoabsorption cross section, σ − 2 , have been determined, respectively, from the 1988 photoneutron evaluation of Dietrich and Berman and a mass-dependent symmetry energy coefficient, a sym ( A ) . The data for A ≳ 50 follow, with a RMS deviation of 6%, the power ... [Phys. Rev. C 91, 064602] Published Thu Jun 04, 2015

Schlagwort(e): Nuclear Reactions

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Electromagnetic field and the chiral magnetic effect in the quark-gluon plasma (2015)

Kirill Tuchin

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-06-06

Beschreibung: Author(s): Kirill Tuchin Time evolution of an electromagnetic field created in heavy-ion collisions strongly depends on the electromagnetic response of the quark-gluon plasma, which can be described by the Ohmic and chiral conductivities. The latter is intimately related to the chiral magnetic effect. I argue that a solutio... [Phys. Rev. C 91, 064902] Published Thu Jun 04, 2015

Schlagwort(e): Relativistic Nuclear Collisions

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Electromagnetic and neutral-weak response functions of ^{4}He and ^{12}C (2015)

A. Lovato, S. Gandolfi, J. Carlson, Steven C. Pieper, and R. Schiavilla

American Physical Society (APS)

In: Physical Review C

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Beschreibung: Author(s): A. Lovato, S. Gandolfi, J. Carlson, Steven C. Pieper, and R. Schiavilla The authors calculate a b - i n i t i o quasi-elastic electromagnetic and neutral-weak response functions for A = 4 and A = 12 nuclei by using realistic nuclear two- and three-body forces and one- and two-body electroweak currents, in combination with quantum Monte Carlo methods and maximum-entropy techniques. In the electromagnetic case, their novel approach allows a direct comparison with experimental data. The results challenge the conventional picture that quasi-elastic inclusive scattering is dominated by single-nucleon knockout. [Phys. Rev. C 91, 062501(R)] Published Thu Jun 04, 2015

Schlagwort(e): Electroweak Interaction, Symmetries

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Cluster states and isoscalar monopole transitions of ^{24}Mg (2015)

Y. Chiba and M. Kimura

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-06-06

Beschreibung: Author(s): Y. Chiba and M. Kimura Background: Isoscalar monopole transition has been suggested as a key observable to search for exotic cluster states. Recently, excited 0 + states with strong isoscalar monopole transition strengths were experimentally reported in Mg 24 , but their structures were not revealed because of the lack of th... [Phys. Rev. C 91, 061302(R)] Published Thu Jun 04, 2015

Schlagwort(e): Nuclear Structure

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Ab initio (2015)

E. Dikmen, A. F. Lisetskiy, B. R. Barrett, P. Maris, A. M. Shirokov, and J. P. Vary

American Physical Society (APS)

In: Physical Review C

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Beschreibung: Author(s): E. Dikmen, A. F. Lisetskiy, B. R. Barrett, P. Maris, A. M. Shirokov, and J. P. Vary We perform ab initio no-core shell-model calculations for A = 18 and 19 nuclei in a 4 ℏ Ω , or N max = 4 , model space by using the effective JISP16 and chiral N3LO nucleon-nucleon potentials and transform the many-body effective Hamiltonians into the 0 ℏ Ω model space to construct the A -body effective Hamilto... [Phys. Rev. C 91, 064301] Published Tue Jun 02, 2015

Schlagwort(e): Nuclear Structure

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Role of Landau quantization on the neutron-drip transition in magnetar crusts (2015)

N. Chamel, Zh. K. Stoyanov, L. M. Mihailov, Y. D. Mutafchieva, R. L. Pavlov, and Ch. J. Velchev

American Physical Society (APS)

In: Physical Review C

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Beschreibung: Author(s): N. Chamel, Zh. K. Stoyanov, L. M. Mihailov, Y. D. Mutafchieva, R. L. Pavlov, and Ch. J. Velchev The role of a strong magnetic field on the neutron-drip transition in the crust of a magnetar is studied. The composition of the crust and the neutron-drip threshold are determined numerically for different magnetic field strengths using the experimental atomic mass measurements from the 2012 Atomic... [Phys. Rev. C 91, 065801] Published Tue Jun 02, 2015

Schlagwort(e): Nuclear Astrophysics

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Extended Skyrme pseudopotential deduced from infinite nuclear matter properties (2015)

D. Davesne, J. Navarro, P. Becker, R. Jodon, J. Meyer, and A. Pastore

American Physical Society (APS)

In: Physical Review C

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Beschreibung: Author(s): D. Davesne, J. Navarro, P. Becker, R. Jodon, J. Meyer, and A. Pastore We discuss the contributions to the equation of state for the N ℓ LO Skyrme pseudopotential ( ℓ = 2 , 3 ) . We show that by adding fourth- and sixth-order gradient terms, it is possible to fairly reproduce the spin/isospin decomposition of an equation of state obtained from ab initio methods. Moreover, by in... [Phys. Rev. C 91, 064303] Published Thu Jun 04, 2015

Schlagwort(e): Nuclear Structure

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α (2015)

Arshdeep Kaur, Sahila Chopra, and Raj K. Gupta

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-06-06

Beschreibung: Author(s): Arshdeep Kaur, Sahila Chopra, and Raj K. Gupta The earlier study of Ce * 124 formed in the S 32 + Mo 92 reaction at an above barrier beam energy of 150 MeV, using the pocket formula of Blocki et al. for the nuclear proximity potential in the dynamical cluster-decay model (DCM), is extended to the use of other nuclear interaction potentials derived fro... [Phys. Rev. C 91, 064601] Published Wed Jun 03, 2015

Schlagwort(e): Nuclear Reactions

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Infrared length scale and extrapolations for the no-core shell model (2015)

K. A. Wendt, C. Forssén, T. Papenbrock, and D. Sääf

American Physical Society (APS)

In: Physical Review C

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Beschreibung: Author(s): K. A. Wendt, C. Forssén, T. Papenbrock, and D. Sääf We precisely determine the infrared (IR) length scale of the no-core shell model (NCSM). In the NCSM, the A -body Hilbert space is truncated by the total energy, and the IR length can be determined by equating the intrinsic kinetic energy of A nucleons in the NCSM space to that of A nucleons in a 3 ( A ... [Phys. Rev. C 91, 061301(R)] Published Wed Jun 03, 2015

Schlagwort(e): Nuclear Structure

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Hoyle band and α condensation in ^{12} C (2015)

Y. Funaki

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-04

Beschreibung: Author(s): Y. Funaki The excited states in C 12 are investigated by using an extended version of the so-called Tohsaki-Horiuchi-Schuck-Röpke (THSR) wave function, where both the 3 α condensate and Be 8 + α cluster asymptotic configurations are included. A new method is also used to resolve spurious continuum coupling with ph… [Phys. Rev. C 92, 021302(R)] Published Mon Aug 03, 2015

Schlagwort(e): Nuclear Structure

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Constraining the symmetry energy content of nuclear matter from nuclear masses: A covariance analysis (2015)

C. Mondal, B. K. Agrawal, and J. N. De

American Physical Society (APS)

In: Physical Review C

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Beschreibung: Author(s): C. Mondal, B. K. Agrawal, and J. N. De Elements of nuclear symmetry energy evaluated from different energy density functionals parametrized by fitting selective bulk properties of few representative nuclei are seen to vary widely. Those obtained from experimental data on nuclear masses across the periodic table, however, show that they a… [Phys. Rev. C 92, 024302] Published Mon Aug 03, 2015

Schlagwort(e): Nuclear Structure

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Asymmetric nuclear matter in a parity doublet model with hidden local symmetry (2015)

Yuichi Motohiro, Youngman Kim, and Masayasu Harada

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-04

Beschreibung: Author(s): Yuichi Motohiro, Youngman Kim, and Masayasu Harada We construct a model to describe dense hadronic matter at zero and finite temperatures, based on the parity doublet model of DeTar and Kunihiro [C. E. DeTar and T. Kunihiro, Phys. Rev. D 39 , 2805 (1989) ], including the isosinglet scalar meson σ as well as ρ and ω mesons. We show that, by including a… [Phys. Rev. C 92, 025201] Published Mon Aug 03, 2015

Schlagwort(e): Hadronic Physics and QCD

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Spurious finite-size instabilities in nuclear energy density functionals: Spin channel (2015)

A. Pastore, D. Tarpanov, D. Davesne, and J. Navarro

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-04

Beschreibung: Author(s): A. Pastore, D. Tarpanov, D. Davesne, and J. Navarro Background: It has been recently shown that some Skyrme functionals can lead to nonconverging results in the calculation of some properties of atomic nuclei. A previous study has pointed out a possible link between these convergence problems and the appearance of finite-size instabilities in symmetr… [Phys. Rev. C 92, 024305] Published Mon Aug 03, 2015

Schlagwort(e): Nuclear Structure

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Decay spectroscopy of element 115 daughters: ^{280} Rg→ ^{276} Mt and ^{276} Mt→ ^{272} Bh (2015)

J. M. Gates et al.

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-04

Beschreibung: Author(s): J. M. Gates et al. Forty-six decay chains, assigned to the decay of 115 288 , were produced using the Am 243 ( Ca 48 , 3 n ) 115 288 reaction at the Lawrence Berkeley National Laboratory 88-in. cyclotron. The resulting series of α decays were studied using α -photon and α -x-ray spectroscopies. Multiple α -photon coincidences were o… [Phys. Rev. C 92, 021301(R)] Published Mon Aug 03, 2015

Schlagwort(e): Nuclear Structure

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The Optimization of Transportation Costs in Logistics Enterprises with Time-Window Constraints (2015)

Qingyou Yan and Qian Zhang

Hindawi

In: Discrete Dynamics in Nature and Society

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Publikationsdatum: 2015-08-04

Beschreibung: This paper presents a model for solving a multiobjective vehicle routing problem with soft time-window constraints that specify the earliest and latest arrival times of customers. If a customer is serviced before the earliest specified arrival time, extra inventory costs are incurred. If the customer is serviced after the latest arrival time, penalty costs must be paid. Both the total transportation cost and the required fleet size are minimized in this model, which also accounts for the given capacity limitations of each vehicle. The total transportation cost consists of direct transportation costs, extra inventory costs, and penalty costs. This multiobjective optimization is solved by using a modified genetic algorithm approach. The output of the algorithm is a set of optimal solutions that represent the trade-off between total transportation cost and the fleet size required to service customers. The influential impact of these two factors is analyzed through the use of a case study.

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Supplier Selection Group Decision Making in Logistics Service Value Cocreation Based on Intuitionistic Fuzzy Sets (2015)

Qifeng Wang and Hongbo Lv

Hindawi

In: Discrete Dynamics in Nature and Society

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Publikationsdatum: 2015-08-04

Beschreibung: Intuitionistic fuzzy information aggregation plays an important role in intuitionistic fuzzy set theory and is widely used in group decision making. In this paper, an induced intuitionistic fuzzy Einstein hybrid aggregation operator (I-IFEHA) is investigated for supplier selection group decision making in logistics service value cocreation based on fuzzy measures. We first introduce some aggregation operators and Einstein operations on intuitionistic fuzzy sets and develop a new induced intuitionistic fuzzy Einstein hybrid aggregation operator to accommodate the environment in which the given arguments are intuitionistic fuzzy values. Then, we study the supplier selection group decision model in logistics service value cocreation based on intuitionistic fuzzy sets with the I-IFEHA operator. Finally, an example of 3PL supplier selection in logistics service value cocreation environment is given to verify the developed approach and to demonstrate the effectiveness of the developed approach.

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Modeling Mixed Bicycle Traffic Flow: A Comparative Study on the Cellular Automata Approach (2015)

Dan Zhou, Sheng Jin, Dongfang Ma, and Dianhai Wang

Hindawi

In: Discrete Dynamics in Nature and Society

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Publikationsdatum: 2015-08-04

Beschreibung: Simulation, as a powerful tool for evaluating transportation systems, has been widely used in transportation planning, management, and operations. Most of the simulation models are focused on motorized vehicles, and the modeling of nonmotorized vehicles is ignored. The cellular automata (CA) model is a very important simulation approach and is widely used for motorized vehicle traffic. The Nagel-Schreckenberg (NS) CA model and the multivalue CA (M-CA) model are two categories of CA model that have been used in previous studies on bicycle traffic flow. This paper improves on these two CA models and also compares their characteristics. It introduces a two-lane NS CA model and M-CA model for both regular bicycles (RBs) and electric bicycles (EBs). In the research for this paper, many cases, featuring different values for the slowing down probability, lane-changing probability, and proportion of EBs, were simulated, while the fundamental diagrams and capacities of the proposed models were analyzed and compared between the two models. Field data were collected for the evaluation of the two models. The results show that the M-CA model exhibits more stable performance than the two-lane NS model and provides results that are closer to real bicycle traffic.

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A Segmented Signal Progression Model for the Modern Streetcar System (2015)

Baojie Wang, Wei Wang, Xiaojian Hu, and Xiaowei Li

Hindawi

In: Discrete Dynamics in Nature and Society

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Publikationsdatum: 2015-08-05

Beschreibung: This paper is on the purpose of developing a segmented signal progression model for modern streetcar system. The new method is presented with the following features: (1) the control concept is based on the assumption of only one streetcar line operating along an arterial under a constant headway and no bandwidth demand for streetcar system signal progression; (2) the control unit is defined as a coordinated intersection group associated with several streetcar stations, and the control joints must be streetcar stations; (3) the objective function is built to ensure the two-way streetcar arrival times distributing within the available time of streetcar phase; (4) the available time of streetcar phase is determined by timing schemes, intersection structures, track locations, streetcar speeds, and vehicular accelerations; (5) the streetcar running speed is constant separately whether it is in upstream or downstream route; (6) the streetcar dwell time is preset according to historical data distribution or charging demand. The proposed method is experimentally examined in Hexi New City Streetcar Project in Nanjing, China. In the experimental results, the streetcar system operation and the progression impacts are shown to affect transit and vehicular traffic. The proposed model presents promising outcomes through the design of streetcar system segmented signal progression, in terms of ensuring high streetcar system efficiency and minimizing negative impacts on transit and vehicular traffic.

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Simulation-Based Sensor Location Model for Arterial Street (2015)

Qinxiao Yu, Ning Zhu, Geng Li, and Shoufeng Ma

Hindawi

In: Discrete Dynamics in Nature and Society

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Publikationsdatum: 2015-08-05

Beschreibung: Traffic sensors serve as an important way to a number of intelligent transportation system applications which rely heavily on real-time data. However, traffic sensors are costly. Therefore, it is necessary to optimize sensor placement to maximize various benefits. Arterial street traffic is highly dynamic and the movement of vehicles is disturbed by signals and irregular vehicle maneuver. It is challenging to estimate the arterial street travel time with limited sensors. In order to solve the problem, the paper presents travel time estimation models that rely on speed data collected by sensor. The relationship between sensor position and vehicle trajectory in single link is investigated. A sensor location model in signalized arterial is proposed to find the optimal sensor placement with the minimum estimation error of arterial travel time. Numerical experiments are conducted in 3 conditions: synchronized traffic signals, green wave traffic signals, and vehicle-actuated signals. The results indicate that the sensors should not be placed in vehicle queuing area. Intersection stop line is an ideal sensor position. There is not any fixed sensor position that can cope with all traffic conditions.

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On Pseudorapidity Distribution and Speed of Sound in High Energy Heavy Ion Collisions Based on a New Revised Landau Hydrodynamic Model (2015)

Li-Na Gao and Fu-Hu Liu

Hindawi

In: Advances in High Energy Physics

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Publikationsdatum: 2015-07-30

Beschreibung: We propose a new revised Landau hydrodynamic model to study systematically the pseudorapidity distributions of charged particles produced in heavy ion collisions over an energy range from a few GeV to a few TeV per nucleon pair. The interacting system is divided into three sources, namely, the central, target, and projectile sources, respectively. The large central source is described by the Landau hydrodynamic model and further revised by the contributions of the small target/projectile sources. The modeling results are in agreement with the available experimental data at relativistic heavy ion collider, large hadron collider, and other energies for different centralities. The value of square speed of sound parameter in different collisions has been extracted by us from the widths of rapidity distributions. Our results show that, in heavy ion collisions at energies of the two colliders, the central source undergoes a phase transition from hadronic gas to quark-gluon plasma liquid phase; meanwhile, the target/projectile sources remain in the state of hadronic gas. The present work confirms that the quark-gluon plasma is of liquid type rather than being of a gas type.

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Fermion Fields in BTZ Black Hole Space-Time and Entanglement Entropy (2015)

Dharm Veer Singh and Sanjay Siwach

Hindawi

In: Advances in High Energy Physics

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Publikationsdatum: 2015-08-06

Beschreibung: We study the entanglement entropy of fermion fields in BTZ black hole space-time and calculate prefactor of the leading and subleading terms and logarithmic divergence term of the entropy using the discretized model. The leading term is the standard Bekenstein-Hawking area law and subleading term corresponds to first quantum corrections in black hole entropy. We also investigate the corrections to entanglement entropy for massive fermion fields in BTZ space-time. The mass term does not affect the area law.

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Global calculations of microscopic energies and nuclear deformations: Isospin dependence of the spin-orbit coupling (2015)

Zhe-Ying Wu, Chong Qi, Ramon Wyss, and Hong-Liang Liu

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-06

Beschreibung: Author(s): Zhe-Ying Wu, Chong Qi, Ramon Wyss, and Hong-Liang Liu Background: The deviation between different model calculations that may occur when one goes toward regions where the masses are unknown is getting increased attention. This is related to the uncertainties of the different models which may have not been fully understood. Purpose: To explore in detail… [Phys. Rev. C 92, 024306] Published Tue Aug 04, 2015

Schlagwort(e): Nuclear Structure

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Energy dependence of Kπ, pπ, and Kp fluctuations in Au + Au collisions from sqrt[s_{NN} ] =7.7 to 200 GeV (2015)

L. Adamczyk et al. (STAR Collaboration)

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-08

Beschreibung: Author(s): L. Adamczyk et al. (STAR Collaboration) A search for the quantum chromodynamics (QCD) critical point was performed by the STAR experiment at the BNL Relativistic Heavy Ion Collider, using dynamical fluctuations of unlike particle pairs. Heavy ion collisions were studied over a large range of collision energies with homogeneous acceptance … [Phys. Rev. C 92, 021901(R)] Published Fri Aug 07, 2015

Schlagwort(e): Relativistic Nuclear Collisions

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Direct microscopic calculation of nuclear level densities in the shell model Monte Carlo approach (2015)

Y. Alhassid, M. Bonett-Matiz, S. Liu, and H. Nakada

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-08

Beschreibung: Author(s): Y. Alhassid, M. Bonett-Matiz, S. Liu, and H. Nakada Nuclear level densities are required for estimating statistical nuclear reaction rates. The shell model Monte Carlo method is a powerful approach for microscopic calculation of state densities in very large model spaces. However, these state densities include the spin degeneracy of each energy level… [Phys. Rev. C 92, 024307] Published Thu Aug 06, 2015

Schlagwort(e): Nuclear Structure

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Modeling and Simulation of Polarization in Internet Group Opinions Based on Cellular Automata (2015)

Yaofeng Zhang and Renbin Xiao

Hindawi

In: Discrete Dynamics in Nature and Society

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Publikationsdatum: 2015-08-10

Beschreibung: Hot events on Internet always attract many people who usually form one or several opinion camps through discussion. For the problem of polarization in Internet group opinions, we propose a new model based on Cellular Automata by considering neighbors, opinion leaders, and external influences. Simulation results show the following: (1) It is easy to form the polarization for both continuous opinions and discrete opinions when we only consider neighbors influence, and continuous opinions are more effective in speeding the polarization of group. (2) Coevolution mechanism takes more time to make the system stable, and the global coupling mechanism leads the system to consensus. (3) Opinion leaders play an important role in the development of consensus in Internet group opinions. However, both taking the opinion leaders as zealots and taking some randomly selected individuals as zealots are not conductive to the consensus. (4) Double opinion leaders with consistent opinions will accelerate the formation of group consensus, but the opposite opinions will lead to group polarization. (5) Only small external influences can change the evolutionary direction of Internet group opinions.

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Three-pion exchange nucleon-nucleon potentials with virtual Δ-isobar excitation (2015)

N. Kaiser

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-11

Beschreibung: Author(s): N. Kaiser The nucleon-nucleon interaction arising from the exchange of three pions and the excitation of Δ ( 1232 ) isobars in intermediate states is studied. Approximating the Δ propagator by the inverse Δ N mass-splitting, analytical expressions are derived for the spectral functions of the isoscalar and isovec… [Phys. Rev. C 92, 024002] Published Mon Aug 10, 2015

Schlagwort(e): Nucleon-Nucleon Interaction, Few-Body Systems

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Non-Markovian fission rate within the Kramers model (2015)

S. V. Radionov and V. M. Kolomietz

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-13

Beschreibung: Author(s): S. V. Radionov and V. M. Kolomietz We investigate possible non-Markovian effects in fission dynamics of highly excited nuclei by using the generalized Langevin approach for a single nuclear shape parameter. We estimate the effective friction and stiffness coefficients of the non-Markovian dynamics for different values of the correlat… [Phys. Rev. C 92, 024311] Published Wed Aug 12, 2015

Schlagwort(e): Nuclear Structure

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Energy loss, hadronization, and hadronic interactions of heavy flavors in relativistic heavy-ion collisions (2015)

Shanshan Cao, Guang-You Qin, and Steffen A. Bass

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-15

Beschreibung: Author(s): Shanshan Cao, Guang-You Qin, and Steffen A. Bass We construct a theoretical framework to describe the evolution of heavy flavors produced in relativistic heavy-ion collisions. The in-medium energy loss of heavy quarks is described using our modified Langevin equation that incorporates both quasielastic scatterings and the medium-induced gluon radi… [Phys. Rev. C 92, 024907] Published Fri Aug 14, 2015

Schlagwort(e): Relativistic Nuclear Collisions

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Squeezed correlations of ϕ meson pairs for hydrodynamic sources in high-energy heavy-ion collisions (2015)

Yong Zhang, Jing Yang, and Wei-Ning Zhang

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-15

Beschreibung: Author(s): Yong Zhang, Jing Yang, and Wei-Ning Zhang In the hot and dense hadronic sources formed in high-energy heavy-ion collisions, the particle interactions in medium might lead to a squeezed back-to-back correlation (BBC) of boson-antiboson pairs. We calculate the BBC functions of ϕ ϕ for sources evolving hydrodynamically in ( 2 + 1 ) dimensions and w… [Phys. Rev. C 92, 024906] Published Thu Aug 13, 2015

Schlagwort(e): Relativistic Nuclear Collisions

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Erratum: Mass yield distributions and fission modes in photofission of ^{238} U below 20 MeV [Phys. Rev. C 91, 034603 (2015)] (2015)

S. S. Belyshev, B. S. Ishkhanov, A. A. Kuznetsov, and K. A. Stopani

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-15

Beschreibung: Author(s): S. S. Belyshev, B. S. Ishkhanov, A. A. Kuznetsov, and K. A. Stopani [Phys. Rev. C 92, 029902] Published Fri Aug 14, 2015

Schlagwort(e): Errata

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Estimation of Saturation Flow Rate and Start-Up Lost Time for Signal Timing Based on Headway Distribution (2015)

Yi Zhao, Wenbo Zhang, Jian Lu, Wenjun Zhang, and Yongfeng Ma

Hindawi

In: Discrete Dynamics in Nature and Society

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Publikationsdatum: 2015-08-11

Beschreibung: This study aimed to calibrate saturation flow rate (SFR) and start-up lost time (SLT) when developing signal timing. In current commonly used methods, SFR for one given lane is usually calibrated from many subjective adjustment factors and a fixed result. SLT is calculated based on the fixed SFR, which prevents local applications in China. Considering the importance of traffic behavior (headway) in determining SFR and SLT, this study started from headway distribution and attempted to specify the relationships between headway and vehicle position directly. A common intersection in Nanjing, China, was selected to implement field study and data from 920 queues was collected. Headway distribution was explored and the 78th percentile of headway at each position was selected to build model. Based on the developed relationships, SFR and SLT were calibrated. The results showed that SFR and SLT were correlated with queue length. Moreover, the results showed that it was difficult to reach saturated state even with a long queue length. This paper provides a new perspective on calibrating important parameters in signal timing, which will be useful for traffic agencies to complete signal timing by making the process simpler.

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Evolution Game Model of Travel Mode Choice in Metropolitan (2015)

Chaoqun Wu, Yulong Pei, and Jingpeng Gao

Hindawi

In: Discrete Dynamics in Nature and Society

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Publikationsdatum: 2015-08-11

Beschreibung: The paper describes an evolution game model of travel mode choice to determine whether transportation policies would have the desired effect. The model is first expressed as a two-stage sequential game in the extensive form based on the similarity between evolution game theory and the travel mode choice process. Second, backward induction is used to solve for Nash equilibrium of the game based on the Folk Theorem. Third, the sensitivity analysis suggests that a payoff reduction of travel by any mode will result in a rising proportion of inhabitants travelling by that mode and falling proportions of inhabitants travelling by other modes. Finally, the model is applied to Beijing inhabitants’ travel mode choices during morning peak hours and draws the conclusion that the proportion of inhabitants travelling by rail would increase when traffic congestion is more severe. This confirms that fast construction of the urban rail transit would be an effective means of alleviating traffic congestion. The model may be a useful tool for policy makers for analyzing the complex influence of travel mode choice processes on transport policies and transport construction projects.

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Isospin-breaking interactions studied through mirror energy differences (2015)

M. A. Bentley, S. M. Lenzi, S. A. Simpson, and C. Aa. Diget

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-11

Beschreibung: Author(s): M. A. Bentley, S. M. Lenzi, S. A. Simpson, and C. Aa. Diget Background: Information on charge-dependent (i.e., isospin-non-conserving) interactions is extracted from excited states of mirror nuclei. Purpose: Specifically, the purpose of the study is to extract effective isovector ( V p p − V n n ) interactions which, in general, can either be of Coulomb or nuclear o… [Phys. Rev. C 92, 024310] Published Mon Aug 10, 2015

Schlagwort(e): Nuclear Structure

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Isotopic yields of spallation residues produced in ^{136} Xe-induced reactions on deuterium at 500A MeV (2015)

J. Alcántara-Núñez et al.

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-11

Beschreibung: Author(s): J. Alcántara-Núñez et al. Residual fragment production in reactions induced by Xe 136 projectiles impinging on a liquid deuterium target at 500 A MeV has been measured at GSI. Projectile residues were unambiguously identified in atomic and mass numbers using the Fragment Separator as high-resolution zero-degree spectrometer. T… [Phys. Rev. C 92, 024607] Published Mon Aug 10, 2015

Schlagwort(e): Nuclear Reactions

Print ISSN: 0556-2813

Digitale ISSN: 1089-490X

Thema: Physik

Publiziert von American Physical Society (APS)

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Dynamical coupled-channels model of K^{−} p reactions. II. Extraction of Λ^{*} and Σ^{*} hyperon resonances (2015)

H. Kamano, S. X. Nakamura, T.-S. H. Lee, and T. Sato

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-08-12

Beschreibung: Author(s): H. Kamano, S. X. Nakamura, T.-S. H. Lee, and T. Sato Resonance parameters (pole masses and residues) associated with the excited states of hyperons, Λ * and Σ * , are extracted within a dynamical coupled-channels model developed recently by us [ Phys. Rev. C 90 , 065204 (2014) ] through a comprehensive partial-wave analysis of the K − p → K ¯ N , π Σ , π Λ , η Λ , K Ξ data u… [Phys. Rev. C 92, 025205] Published Tue Aug 11, 2015

Schlagwort(e): Hadronic Physics and QCD

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Thema: Physik

Publiziert von American Physical Society (APS)

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Developing a Traffic Management Framework for Coastal Expressway Bridges under Adverse Weather Conditions: Case Study of Rain Day in Shenzhen, China (2015)

Chenming Jiang, Jian John Lu, Yuming Jiang, Xiaonan Cai, and Anning Ni

Hindawi

In: Discrete Dynamics in Nature and Society

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Publikationsdatum: 2015-08-12

Beschreibung: Adverse weather can reduce visibility and road surface friction, lower vehicle maneuverability, and increase crash frequency and injury severity. The impacts of adverse weather and its interactions with drivers and roadway on the operation and management of expressway or expressway bridges have drawn the researchers’ and managers’ attention to develop traffic management frameworks to mitigate the negative influence. Considering the peculiar geographical location and meteorological conditions, the Guangshen Coast Expressway-Shenzhen Segment (GSCE-SS) was selected as a case in this study to illustrate the proposed traffic management framework on rain days. Conditions categorized by rainfall intensity and traffic flow were the main precondition to make the management decisions. CORSIM simulator was used to develop the alternate routes choice schemes, providing reference for other systems in the proposed traffic management framework. Maps of (a) entrance ramp control (ERC) strategies; (b) mainline control strategies; (c) alternate routes choice; (d) information release schemes, under scenarios of different volume and rainstorm warning grades (BLUE to RED), were drawn to present a reference or demonstration for managers of long-span expressway bridges not only in China, but even in the world.

Print ISSN: 1026-0226

Digitale ISSN: 1607-887X

Thema: Mathematik

Publiziert von Hindawi

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Vehicle Routing Problem with Soft Time Windows Based on Improved Genetic Algorithm for Fruits and Vegetables Distribution (2015)

Peiqing Li, Jie He, Dunyong Zheng, Yongsheng Huang, and Chenhao Fan

Hindawi

In: Discrete Dynamics in Nature and Society

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Publikationsdatum: 2015-08-14

Beschreibung: Fresh fruits and vegetables, perishable by nature, are subject to additional deterioration and bruising in the distribution process due to vibration and shock caused by road irregularities. A nonlinear mathematical model was developed that considered not only the vehicle routing problem with time windows but also the effect of road irregularities on the bruising of fresh fruits and vegetables. The main objective of this work was to obtain the optimal distribution routes for fresh fruits and vegetables considering different road classes with the least amount of logistics costs. An improved genetic algorithm was used to solve the problem. A fruit delivery route among the 13 cities in Jiangsu Province was used as a real analysis case. The simulation results showed that the vehicle routing problem with time windows, considering road irregularities and different classes of toll roads, can significantly influence total delivery costs compared with traditional VRP models. The comparison between four models to predict the total cost and actual total cost in distribution showed that the improved genetic algorithm is superior to the Group-based pattern, CW pattern, and O-X type cross pattern.

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Thema: Mathematik

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Positive Solutions for Systems of Second-Order Difference Equations (2015)

Johnny Henderson and Rodica Luca

Hindawi

In: Discrete Dynamics in Nature and Society

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Publikationsdatum: 2015-09-11

Beschreibung: We study the existence and nonexistence of positive solutions of some systems of nonlinear second-order difference equations subject to multipoint boundary conditions which contain some positive constants.

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Thema: Mathematik

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Null Geodesics and Strong Field Gravitational Lensing of Black Hole with Global Monopole (2015)

M. Sharif and Sehrish Iftikhar

Hindawi

In: Advances in High Energy Physics

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Publikationsdatum: 2015-09-15

Beschreibung: We study two interesting features of a black hole with an ordinary as well as phantom global monopole. Firstly, we investigate null geodesics which imply unstable orbital motion of particles for both cases. Secondly, we evaluate deflection angle in strong field regime. We then find Einstein rings, magnifications, and observables of the relativistic images for supermassive black hole at the center of galaxy NGC4486B. We also examine time delays for different galaxies and present our results numerically. It is found that the deflection angle for ordinary/phantom global monopole is greater/smaller than that of Schwarzschild black hole. In strong field limit, the remaining properties of these black holes are quite different from the Schwarzschild black hole.

Print ISSN: 1687-7357

Digitale ISSN: 1687-7365

Thema: Physik

Publiziert von Hindawi

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Cancellation of the σ meson in thermal models (2015)

Wojciech Broniowski, Francesco Giacosa, and Viktor Begun

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-09-15

Beschreibung: Author(s): Wojciech Broniowski, Francesco Giacosa, and Viktor Begun The by now well-established scalar-isoscalar resonance f 0 ( 500 ) (the σ meson) seems potentially relevant in the evaluation of thermodynamic quantities of a hadronic gas since its mass is low. However, we recall that its contribution to isospin-averaged observables is, to a surprising accuracy, cancel… [Phys. Rev. C 92, 034905] Published Mon Sep 14, 2015

Schlagwort(e): Relativistic Nuclear Collisions

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Thema: Physik

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Search for the terminating 27^{−} state in ^{140} Nd (2015)

C. M. Petrache, I. Ragnarsson, H. Naïdja, F. Nowacki, R. Leguillon, T. Zerrouki, P. T. Greenlees, U. Jakobsson, P. Jones, R. Julin, S. Juutinen, S. Ketelhut, M. Leino, M. Nyman, P. Peura, P. Rahkila, P. Ruotsalainen, J. Saren, C. Scholey, J. Sorri, and J. Uusitalo

American Physical Society (APS)

In: Physical Review C

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Publikationsdatum: 2015-09-15

Beschreibung: Author(s): C. M. Petrache, I. Ragnarsson, H. Naïdja, F. Nowacki, R. Leguillon, T. Zerrouki, P. T. Greenlees, U. Jakobsson, P. Jones, R. Julin, S. Juutinen, S. Ketelhut, M. Leino, M. Nyman, P. Peura, P. Rahkila, P. Ruotsalainen, J. Saren, C. Scholey, J. Sorri, and J. Uusitalo In the search for the fully aligned 27 − state in Nd 140 predicted by cranked Nilsson-Strutinsky calculations, new close-to-spherical high-spin states have been discovered. Both the close-to-spherical and the triaxial calculated states are in good agreement with the experimental results, supporting th… [Phys. Rev. C 92, 034314] Published Mon Sep 14, 2015

Schlagwort(e): Nuclear Structure

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