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  • 1
    Monograph available for loan
    Monograph available for loan
    Geothermics in China (1996)
    Beijing : Seismological Press
    Details Availability
    Call number: M 98.0451
    Type of Medium: Monograph available for loan
    Pages: 299 S.
    ISBN: 7502813640
    Classification:
    Regional Geology
    Language: English
    Location: Upper compact magazine
    Branch Library: GFZ Library
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  • 2
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    Heat flow in the continental area of China: a new data set (2000)
    In:  Earth planet. Sci. Lett., Berlin, Ges. f. Geowissenschaften e.V., vol. 179, no. B2, pp. 407-419, pp. 1754, (ISSN 0343-5164)
    Details
    Publication Date: 2000
    Keywords: Geothermics ; Review article
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    BIBLIOGRAPHY SEISMOLOGY
  • 3
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    Heat flow, deep temperature and thermal structure across the orogenic belts in Southeast China (2000)
    In:  J. Geodynamics, Berlin, Ges. f. Geowissenschaften e.V., vol. 30, no. 4, pp. 461-473, pp. 1754, (ISSN 0343-5164)
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    Publication Date: 2000
    Keywords: Geothermics
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    BIBLIOGRAPHY SEISMOLOGY
  • 4
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    Geothermics in China (1996)
    Seismological Press
    In:  Beijing, 299 pp., Seismological Press, vol. 101, no. 1, pp. 1-40, (ISBN 3-7643-6675-3)
    Details
    Publication Date: 1996
    Keywords: Geothermics ; China ; FROTH ; GFZ: ; M98.0451
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    BIBLIOGRAPHY SEISMOLOGY
  • 5
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    Investigation about relationships between the symmetries of ferroelectric crystal Ca0.28Ba0.72Nb2O6 and second-harmonic patterns (2015)
    American Institute of Physics (AIP)
    Details
    Publication Date: 2015-08-05
    Description: The broadband quasi-phase matching (QPM) process in a uniaxial ferroelectric crystal Ca 0.28 Ba 0.72 Nb 2 O 6 (CBN-28) was demonstrated with the second-harmonic wavelength range from 450 nm to 650 nm, and the relationship between the symmetries of CBN-28 and the second-harmonic patterns was experimentally and theoretically investigated based on the random anti-parallel domains in the crystal and QPM conditions. The dependences of frequency-doubled patterns on the wavelength and anisotropy of the nonlinear crystal were also studied, and the frequency-doubled photons were found to be trapped on circles. By analyzing the light-matter interacting Hamiltonians, the trapping force for second-harmonic photons was found to be centripetal and tunable by the fundamental lasers, and the variation tendencies of the rotational velocity of second-harmonic generation photons could also be predicated. The results indicate that the CBN-28 ferroelectric crystal is a promising nonlinear optical material for the generation of broadband frequency-doubled waves, and the analysis on centripetal force based on the interaction Hamiltonians may provide a novel recognition for the investigation of QPM process to be further studied.
    Print ISSN: 0021-8979
    Electronic ISSN: 1089-7550
    Topics: Physics
    Published by American Institute of Physics (AIP)
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  • 6
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    Temperature dependence of full set tensor properties of KTiOPO4 single crystal measured from one sample (2016)
    American Institute of Physics (AIP)
    Details
    Publication Date: 2016-03-24
    Description: The temperature dependence of the complete set of elastic, dielectric, and piezoelectric constants of KTiOPO 4 single crystal has been measured from 20 °C to 150 °C. All 17 independent constants for the mm2 symmetry piezoelectric crystal were measured from one sample using extended resonance ultrasound spectroscopy (RUS), which guaranteed the self-consistency of the matrix data. The unique characteristics of the RUS method allowed the accomplishment of such a challenging task, which could not be done by any other existing methods. It was found that the elastic constants ( c 11 E , c 13 E , c 22 E , and c 33 E ) and piezoelectric constants ( d 15 , d 24 , and d 32 ) strongly depend on temperature, while other constants are only weakly temperature dependent in this temperature range. These as-grown single domain data allowed us to calculate the orientation dependence of elastic, dielectric, and piezoelectric properties of KTiOPO 4 , which are useful for finding the optimum cut for particular applications.
    Print ISSN: 0021-8979
    Electronic ISSN: 1089-7550
    Topics: Physics
    Published by American Institute of Physics (AIP)
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  • 7
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    Materials, Vol. 12, Pages 2220: Pore Structure Damages in Cement-Based Materials by Mercury Intrusion: A Non-Destructive Assessment by X-Ray Computed Tomography (2019)
    MDPI
    In: Materials
    Details
    Publication Date: 2019
    Description: Mercury intrusion porosimetry (MIP) is questioned for possibly damaging the micro structure of cement-based materials (CBMs), but this theme still has a lack of quantitative evidence. By using X-ray computed tomography (XCT), this study reported an experimental investigation on probing the pore structure damages in paste and mortar samples after a standard MIP test. XCT scans were performed on the samples before and after mercury intrusion. Because of its very high mass attenuation coefficient, mercury can greatly enhance the contrast of XCT images, paving a path to probe the same pores with and without mercury fillings. The paste and mortar showed the different MIP pore size distributions but similar intrusion processes. A grey value inverse for the pores and material skeletons before and after MIP was found. With the features of excellent data reliability and robustness verified by a threshold analysis, the XCT results characterized the surface structure of voids, and diagnosed the pore structure damages in terms of pore volume and size of the paste and mortar samples. The findings of this study deepen the understandings in pore structure damages in CBMs by mercury intrusion, and provide methodological insights in the microstructure characterization of CBMs by XCT.
    Electronic ISSN: 1996-1944
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by MDPI
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  • 8
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    Atomic-layer molybdenum sulfide optical modulator for visible coherent light (2015)
    Springer Nature
    Details
    Publication Date: 2015-06-13
    Description: Coherent light sources in the visible range are playing important roles in our daily life and modern technology, since about 50% of the capability of the our human brains is devoted to processing visual information. Visible lasers can be achieved by nonlinear optical process of infrared lasers and direct lasing of gain materials, and the latter has advantages in the aspects of compactness, efficiency, simplicity, etc. However, due to lack of visible optical modulators, the directly generated visible lasers with only a gain material are constrained in continuous-wave operation. Here, we demonstrated the fabrication of a visible optical modulator and pulsed visible lasers based on atomic-layer molybdenum sulfide (MoS2), a ultrathin two-dimensional material with about 9–10 layers. By employing the nonlinear absorption of the modulator, the pulsed orange, red and deep red lasers were directly generated. Besides, the present atomic-layer MoS2 optical modulator has broadband modulating properties and advantages in the simple preparation process. The present results experimentally verify the theoretical prediction for the low-dimensional optoelectronic modulating devices in the visible wavelength region and may open an attractive avenue for removing a stumbling block for the further development of pulsed visible lasers. Scientific Reports 5 doi: 10.1038/srep11342
    Electronic ISSN: 2045-2322
    Topics: Natural Sciences in General
    Published by Springer Nature
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  • 9
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    Thermal and electromechanical properties of melilite-type piezoelectric single crystals (2015)
    American Institute of Physics (AIP)
    Details
    Publication Date: 2015-02-12
    Description: Melilite-type crystals, including Ca 2 Ga 2 SiO 7 , Ca 2 MgSi 2 O 7 , and CaNdGa 3 O 7 , were successfully grown by the Czochralski technique. Thermal properties were investigated and full matrices of electromechanical constants of these melilite crystals were evaluated by impedance method, with d 14 being on the order of 5.3–9.3 pC/N. The relationship between microstructure and electromechanical properties of the three kinds of crystals was established, in order to explore the piezoelectric origin and further optimize the piezoelectric properties. The distortion of eight-fold antiprisms and the distortion/rotation of tetrahedrons were thought to contribute to the piezoelectric d 14 and d 36 , respectively. In addition, the layered structure leads to strong anisotropic behavior, accounts for the high resistivity along Z direction in Ca 2 MgSi 2 O 7 , while the disordered structure accounts for the degraded resistivity in CaNdGa 3 O 7 . The properties at elevated temperature were investigated, where the elastic constants show high thermal stability over the range of 25–500 °C, with minimal variation of 6%.
    Print ISSN: 0021-8979
    Electronic ISSN: 1089-7550
    Topics: Physics
    Published by American Institute of Physics (AIP)
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  • 10
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    Generation of Crystal-Structure Transverse Patterns via a Self-Frequency-Doubling Laser (2013)
    Springer Nature
    Details
    Publication Date: 2013-01-19
    Description: Two-dimensional (2D) visible crystal-structure patterns analogous to the quantum harmonic oscillator (QHO) have been experimentally observed in the near- and far-fields of a self-frequency-doubling (SFD) microchip laser. Different with the fundamental modes, the localization of the SFD light is changed with the propagation. Calculation based on Hermite-Gaussian (HG) functions and second harmonic generation theory reproduces well the patterns both in the near- and far-field which correspond to the intensity distribution in coordinate and momentum spaces, respectively. Considering the analogy of wave functions of the transverse HG mode and 2D harmonic oscillator, we propose that the simple monolithic SFD lasers can be used for developing of new materials and devices and testing 2D quantum mechanical theories. Scientific Reports 3 doi: 10.1038/srep01085
    Electronic ISSN: 2045-2322
    Topics: Natural Sciences in General
    Published by Springer Nature
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