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  • Articles  (4,882)
  • Hindawi  (4,570)
  • IOS Press  (312)
  • American Meteorological Society
  • Blackwell Publishing Ltd
  • Copernicus
  • Springer Nature
  • Springer Science + Business Media
  • 2020-2022
  • 2010-2014  (4,882)
  • 1960-1964
  • 2012  (4,882)
  • Mathematics  (4,491)
  • Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition  (391)
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  • Articles  (4,882)
Source
Publisher
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  • 2020-2022
  • 2010-2014  (4,882)
  • 1960-1964
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  • 1
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    Automatic Human Gait Imitation and Recognition in 3D from Monocular Video with an Uncalibrated Camera (2012)
    Hindawi
    Details
    Publication Date: 2012-03-09
    Description: A framework of imitating real human gait in 3D from monocular video of an uncalibrated camera directly and automatically is proposed. It firstly combines polygon-approximation with deformable template-matching, using knowledge of human anatomy to achieve the characteristics including static and dynamic parameters of real human gait. Then, these characteristics are processed in regularization and normalization. Finally, they are imposed on a 3D human motion model with prior constrains and universal gait knowledge to realize imitating human gait. In recognition based on this human gait imitation, firstly, the dimensionality of time-sequences corresponding to motion curves is reduced by NPE. Then, we use the essential features acquired from human gait imitation as input and integrate HCRF with SVM as a whole classifier, realizing identification recognition on human gait. In associated experiment, this imitation framework is robust for the object’s clothes and backpacks to a certain extent. It does not need any manual assist and any camera model information. And it is fitting for straight indoors and the viewing angle for target is between 60° and 120°. In recognition testing, this kind of integrated classifier HCRF/SVM has comparatively higher recognition rate than the sole HCRF, SVM and typical baseline method.
    Print ISSN: 1024-123X
    Electronic ISSN: 1563-5147
    Topics: Mathematics , Technology
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  • 2
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    Multipath Adaptive Tabu Search for a Vehicle Control Problem (2012)
    Hindawi
    Details
    Publication Date: 2012-02-24
    Description: Tabu search has become acceptable worldwide as one of the most efficient intelligent searches applied to various real-world problems. There have been different modifications made to the generic tabu search in recent years to achieve better performances. Among those reviewed in the introduction of this paper, the adaptive tabu search (ATS) has incorporated the backtracking and the adaptive search radius mechanisms that help accelerate the search and release it from a local solution lock. The paper explains an enhancement made to the ATS to accomplish multipath ATS (MATS) algorithms. Performances of the ATS and the MATS are evaluated using surface optimization problems, and results are presented in the paper. Finally, the MATS is applied to solve a real-world vehicle control problem.
    Print ISSN: 1110-757X
    Electronic ISSN: 1687-0042
    Topics: Mathematics
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  • 3
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    Compressible flows: New existence results and justification of the Reynolds asymptotic in thin films (2012)
    IOS Press
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    Publication Date: 2012-03-13
    Description: In this paper, we are first interested in the compressible Navier–Stokes equations with density dependent viscosities in bounded domains with non-homogeneous Dirichlet conditions. We study the well posedness of such models with density dependent viscosity coefficients in the non-stationary and in the stationary cases. We apply the last result in thin domains context, justifying the compressible Reynolds equations. Content Type Journal Article Pages 193-231 DOI 10.3233/ASY-2011-1070 Authors Laurent Chupin, Laboratoire de Mathématiques, UMR 6620, Université Blaise Pascal, Aubière, France Rémy Sart, Ecole Supérieure d'Ingénieurs Léonard de Vinci, Paris La Défense, France Journal Asymptotic Analysis Online ISSN 1875-8576 Print ISSN 0921-7134 Journal Volume Volume 76 Journal Issue Volume 76, Number 3-4 / 2012
    Print ISSN: 0921-7134
    Electronic ISSN: 1875-8576
    Topics: Mathematics
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  • 4
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    Propagation of chaos for many-boson systems in one dimension with a point pair-interaction (2012)
    IOS Press
    Details
    Publication Date: 2012-03-13
    Description: We study the mean field limit of nonrelativistic quantum many-boson systems with delta potential in one-dimensional space. Such problem is related to the semiclassical limit of a second quantized Hamiltonian with an interaction given by a quartic Wick product. In this framework, we show that the evolution of coherent states is semiclassically given by squeezed coherent states under the action of a time-dependent affine Bogoliubov transformation. Results similar to those stated by Hepp [Comm. Math. Phys. 35 (1974), 265–277] and Ginibre-Velo [Comm. Math. Phys. 66 (1979), 37–76 and 68 (1979), 45–68] are proved. Furthermore, we show propagation of chaos for Schrödinger dynamics in the mean field limit using the argument of Rodnianski–Schlein [Comm. Math. Phys. 291 (2009), 31–61]. Thus, we provide a derivation of the cubic NLS equation in one dimension. Content Type Journal Article Pages 123-170 DOI 10.3233/ASY-2011-1064 Authors Z. Ammari, IRMAR, Université de Rennes I, UMR-CNRS 6625, Campus de Beaulieu, 35042 Rennes Cedex, France. E-mails: {zied.ammari, sebastien.breteaux}@univ-rennes1.fr S. Breteaux, IRMAR, Université de Rennes I, UMR-CNRS 6625, Campus de Beaulieu, 35042 Rennes Cedex, France. E-mails: {zied.ammari, sebastien.breteaux}@univ-rennes1.fr Journal Asymptotic Analysis Online ISSN 1875-8576 Print ISSN 0921-7134 Journal Volume Volume 76 Journal Issue Volume 76, Number 3-4 / 2012
    Print ISSN: 0921-7134
    Electronic ISSN: 1875-8576
    Topics: Mathematics
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  • 5
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    Nonclassical problems with nonlocal initial conditions for second-order evolution equations (2012)
    IOS Press
    Details
    Publication Date: 2012-03-13
    Description: In this paper we consider the nonclassical initial and initial-boundary value problems for second-order evolution equations with nonlocal initial conditions. We study the existence and uniqueness, in suitable abstract spaces, of solution of vector-valued distributions for such problems. We also present an algorithm of approximation of the solution of nonclassical problem with nonlocal initial conditions by a sequence of solutions of the corresponding classical problems. As an example we investigate the case of nonclassical hyperbolic equations and systems. In this particular case we show that the existence and uniqueness of solutions rely on algebraic properties of the ratios of values of the time variable in the nonlocal initial conditions and sizes of the spatial domain. Content Type Journal Article Pages 171-192 DOI 10.3233/ASY-2011-1065 Authors G. Avalishvili, Faculty of Exact and Natural Sciences, I. Javakhishvili Tbilisi State University, Tbilisi, Georgia M. Avalishvili, School of Mathematics and Information Technologies, University of Georgia, Tbilisi, Georgia B. Miara, Laboratoire de Modélisation et Simulation Numérique École Supérieure d'Ingénieurs en Électrotechnique et Électronique, Cité Descartes, Noisy-le-Grand Cedex, France Journal Asymptotic Analysis Online ISSN 1875-8576 Print ISSN 0921-7134 Journal Volume Volume 76 Journal Issue Volume 76, Number 3-4 / 2012
    Print ISSN: 0921-7134
    Electronic ISSN: 1875-8576
    Topics: Mathematics
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  • 6
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    Eigenvalue bounds for radial magnetic bottles on the disk (2012)
    IOS Press
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    Publication Date: 2012-03-13
    Description: We consider a Schrödinger operator HA D with a non-vanishing radial magnetic field B=dA and Dirichlet boundary conditions on the unit disk. We assume growth conditions on B near the boundary which guarantee in particular the compactness of the resolvent of this operator. Under some assumptions on an additional radial potential V the operator HA D −V has a discrete negative spectrum and we obtain an upper bound of the number of negative eigenvalues. As a consequence we get an upper bound of the number of eigenvalues of HA D smaller than any positive value λ, which involves the minimum of B and the square of the L 2 -norm of A(r)/r, where A(r) is the specific magnetic potential defined as the flux of the magnetic field through the disk of radius r centered in the origin. Content Type Journal Article Pages 233-248 DOI 10.3233/ASY-2011-1077 Authors Françoise Truc, Institut Fourier, Unité mixte de recherche CNRS-UJF 5582, BP 74, 38402 – Saint Martin d'Hères Cedex, France. E-mail: francoise.truc@ujf-grenoble.fr Journal Asymptotic Analysis Online ISSN 1875-8576 Print ISSN 0921-7134 Journal Volume Volume 76 Journal Issue Volume 76, Number 3-4 / 2012
    Print ISSN: 0921-7134
    Electronic ISSN: 1875-8576
    Topics: Mathematics
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  • 7
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    Multiple Periodic Solutions of Delayed Predator-Prey Systems with Type IV Functional Responses on Time Scales (2012)
    Hindawi
    Details
    Publication Date: 2012-03-13
    Description: With the help of a continuation theorem based on Gaines and Mawhin's coincidence degree, easily verifiable criteria are established for the existence of multiple positive periodic solutions of delayed predator-prey systems with type IV functional responses on time scales. Our results not only unify the existing ones but also widen the range of applications.
    Print ISSN: 1026-0226
    Electronic ISSN: 1607-887X
    Topics: Mathematics
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  • 8
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    A Generalized and Improved (G′/G)-Expansion Method for Nonlinear Evolution Equations (2012)
    Hindawi
    Details
    Publication Date: 2012-03-13
    Description: A generalized and improved (G′/G)-expansion method is proposed for finding more general type and new travelling wave solutions of nonlinear evolution equations. To illustrate the novelty and advantage of the proposed method, we solve the KdV equation, the Zakharov-Kuznetsov-Benjamin-Bona-Mahony (ZKBBM) equation and the strain wave equation in microstructured solids. Abundant exact travelling wave solutions of these equations are obtained, which include the soliton, the hyperbolic function, the trigonometric function, and the rational functions. Also it is shown that the proposed method is efficient for solving nonlinear evolution equations in mathematical physics and in engineering.
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    Topics: Mathematics , Technology
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  • 9
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    On the Dynamics of a Higher-Order Difference Equation (2012)
    Hindawi
    Details
    Publication Date: 2012-03-16
    Description: This paper deals with the investigation of the following more general rational difference equation: yn+1=αyn/(β+γ∑i=0kyn-(2i+1)p∏i=0kyn-(2i+1)), n=0,1,2,…, where α,β,γ,p∈(0,∞) with the initial conditions x0,x-1,…,x-2k,x-2k-1∈(0,∞). We investigate the existence of the equilibrium points of the considered equation and then study their local and global stability. Also, some results related to the oscillation and the permanence of the considered equation have been presented.
    Print ISSN: 1026-0226
    Electronic ISSN: 1607-887X
    Topics: Mathematics
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  • 10
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    Synchronization of Two Rank-One Chaotic Systems without and with Delay via Linear Delayed Feedback Control (2012)
    Hindawi
    Details
    Publication Date: 2012-03-16
    Description: This paper illustrates the presence of chaos in rank-one chaotic systems with delay via a binary test (called 0-1 test) for chaos. Chaotic synchronization between two rank-one chaotic systems without and with delay is achieved by means of Lyapunov functional and linear delayed feedback control method. Numerical simulations are implemented to verify the effectiveness of the proposed chaos synchronization scheme.
    Print ISSN: 1110-757X
    Electronic ISSN: 1687-0042
    Topics: Mathematics
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