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355 results on '"Li Guo-Jun"'

107. Soft clay consolidation under reclamation fill and reliability analysis

Author

Li, Guo Jun., Choa, Victor Choon Eng, School of Civil and Structural Engineering, and Low, Bak Kong

Subjects
Engineering::Civil engineering::Geotechnical [DRNTU]
Abstract

The purpose of this study is to develop a method to predict the response of clay treated with vertical drains, to study the effect of uncertainties of soil properties and spatial continuity on the settlement and rate of consolidation. Doctor of Philosophy (CSE)

Published
2000

111. Structural, elastic, electronic and optical properties of platinum-based superconductor SrPt 3 P under pressure: a first-principles study.

Author

Zhang, Xiu-Qing, Li, Guo-Jun, Cheng, Yan, and Ji, Guang-Fu

Subjects
*ELECTRONIC structure, *SUPERCONDUCTORS, *ELASTIC constants, *DENSITY functional theory, *YOUNG'S modulus
Abstract

The structural, elastic, electronic and optical properties of the platinum-based superconductor SrPt3P under pressure are investigated by the generalized gradient approximation with the Perdew–Burke–Ernzerhof exchange-correlation functional in the framework of density-functional theory. The calculated structural parameters (a,c) and the primitive cell volumeVof SrPt3P at the ground state are in good agreement with the available experimental data and seem to be better than other calculated results. The pressure dependences of the elastic constants \mathop C\nolimits_{ij}, bulk modulusB, shear modulusG, Young’s modulusEand Poisson’s ratioσof SrPt3P are also obtained successfully. The computed elastic constants indicate that SrPt3P is mechanically stable up to 100 GPa. The obtainedB/Gis 2.56 at the ground state, indicating that SrPt3P behaves in a ductile manner. The ratioB/Galso increases with growing pressures, indicating that the structure becomes more and more ductile. Even though SrPt3P is an ionic-covalent crystal, the obtained density of states shows that it has metallic characteristic. These conclusions can be further demonstrated by analysing the charge and Mulliken population. In addition, we have investigated the dielectric function and the loss function. It is found that the dielectric function in (E||x,E||y) is isotropic, whereas the directions (E||x,E||z) are anisotropic; the effect of pressure on the loss function of the deep ultraviolet region gradually increases as the pressure increases. [ABSTRACT FROM AUTHOR]

Published
2016
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150. Far-field focusing properties of two-dimensional honeycomb photonic crystals and the effect of the interface

Author

Li Guo-Jun, Kang Xue-Liang, and Li Yong-Ping

Subjects
Materials science, business.industry, Finite-difference time-domain method, Physics::Optics, General Physics and Astronomy, Near and far field, Low transmission, Rod, Optics, Negative refraction, Lattice (order), Slab, business, Photonic crystal
Abstract

The far-field focusing properties of two dimensional rod-type honeycomb lattice photonic crystals are investigated by using finite difference time domain method，and it was found that it explicitly follows the wave-beam negative refraction law with relative refractive index of -1. But the image qualities are limited by low transmission at large incident angles. The image qualities can be improved by modifying the radius of rods near the surface of photonic crystals slab.

Published
2007
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