Kashgar University

Kashi, China

Kashgar University

Kashi, China
SEARCH FILTERS
Time filter
Source Type

Zhang Z.,Central China Normal University | Yu Z.,Central China Normal University | Yang H.,Central China Normal University | Huang X.,Kashgar University
ISAPE 2016 - Proceedings of the 11th International Symposium on Antennas, Propagation and EM Theory | Year: 2016

We present a detailed study on the artificial negative index refraction behavior of the composite metamaterial consisting of high-permittivity dielectric rings. The rings array in cubic lattice arrangement can exhibit an negative magnetism when excited into magnetic dipole resonance. Full-wave simulations show that the bulk metamaterial with this structure can exhibit a negative refraction behavior. It is shown that artificial magnetic response can originate from differently structured dielectric elements, similarly to the conventional metamaterial constituents based on metal resonance structures. © 2016 IEEE.


Huang X.,Kashgar University | Yu S.,Kashgar University | Chen J.,Central China Normal University | Yang H.,Central China Normal University
ISAPE 2016 - Proceedings of the 11th International Symposium on Antennas, Propagation and EM Theory | Year: 2016

We demonstrate the design, measurement, retrieval effective parameters and calculations of an ultra-broad band metamaterial absorber (MMA), in which the metallic resonant structures including the inserted chip resisters and the substrate are equivalent to a homogeneous and isotropic effective medium. The effective electromagnetic (EM) parameters are retrieved by extracting the reflected and transmitted coefficients, and absorbance of the MMA is calculated by the retrieved effective EM parameters based on effective medium theory. The calculated results are in good agreement with simulations and experiments. © 2016 IEEE.


Tang Y.-Z.,Kashgar University | Li X.-L.,Chongqing Normal University
Chinese Physics B | Year: 2017

We first give a stabilized improved moving least squares (IMLS) approximation, which has better computational stability and precision than the IMLS approximation. Then, analysis of the improved element-free Galerkin method is provided theoretically for both linear and nonlinear elliptic boundary value problems. Finally, numerical examples are given to verify the theoretical analysis. © 2017 Chinese Physical Society and IOP Publishing Ltd.


Rozi A.,Kashgar University | Mamat A.,Kashgar University | Anvar A.,Science Teaching Group
Progress in Biochemistry and Biophysics | Year: 2017

Simulation and modeling is becoming more and more important when studying complex biochemical systems. Most often, ordinary differential equations are employed for this purpose. However, these are only applicable when the numbers of participating molecules in the biochemical systems are large enough to be treated as concentrations. For smaller systems, stochastic simulations based on discrete particle are more accurate. Unfortunately, there are no general rules for determining which method should be employed for a specific problem to get the most realistic result. Therefore, we study the transition from stochastic to deterministic behavior in a widely studied system by calcium oscillation transmission signals. Used stochastic effects of calcium oscillations on glycogen phosphorylase activation in hepatocytes as an example, we attempted to solve the problem of simulation and modeling in the biochemical system with small number of molecules by stochastic differential equation. The possible role of Ca2+ released from the inositol 1, 4, 5-trisphosphate (IP3) receptor channel in the regulation of the phosphorylation-dephosphorylation cycle process involved in glycogen degradation by glycogen phosphorylase have theoretically investigated using stochastic the Li-Rinzel model for cytosolic Ca2+ oscillations. The results show that the fraction of active phosphorylase is decreased with the total number of receptor channel IP3R increasing and for the small concentration of IP3 with appearance of coherence resonance. © 2017 Progress in Biochemistry and Biophysics.


Wang C.-L.,Kashgar University | Xia L.-X.,Kashgar University | Yao H.-B.,Xinjiang Institute of Engineering | Li W.-L.,Xinjiang Institute of Engineering
Chinese Physics B | Year: 2017

We investigate atomic above-threshold ionization in elliptically polarized strong laser fields with a semiclassical approach. With increasing laser intensity, the Coulomb focusing (CF) effects are found to become stronger in both parallel and perpendicular directions with respect to the polarization plane. The dependence of CF effects on tunnel exit, initial transverse momentum distribution and laser electric field is analyzed. It was revealed that the effects of tunnel exit are most prominent with variation of the laser intensity, and the other two factors both play non-negligible roles. Our results provide a deeper insight to the recent experiments of Coulomb asymmetry [Shafir D, et al., 2013 Phys. Rev. Lett. 111 023005 and Li M, et al., 2013 Phys. Rev. Lett. 111 023006]. © 2017 Chinese Physical Society and IOP Publishing Ltd.


Tang Y.,Kashgar University | Li X.,Chongqing Normal University
Engineering Analysis with Boundary Elements | Year: 2017

In this study, combining the boundary integral equations (BIEs) with the complex variable moving least squares (CVMLS) approximation, a symmetric and boundary-only meshless method, the complex variable Galerkin boundary node method (CVGBNM), is developed. Numerical applications and theoretical error estimates of the CVGBNM are derived for BIEs, potential problems and Stokes problems. Finally, numerical examples are given to demonstrate the efficacy of the method. © 2017 Elsevier Ltd


Zhang S.,Bohai University | Gao X.,Kashgar University
Nonlinear Dynamics | Year: 2015

Based on the corresponding bilinear forms, we obtain one-, two- and three-soliton solutions of a new AKNS equation with time-dependent coefficients by using Hirota’s bilinear method. From these obtained solutions, uniform formulae of exact N-soliton solutions of the AKNS equation are summarized. It is graphically shown that the dynamical evolutions of such soliton solutions with time-dependent functions of the AKNS equation possess time-varying speeds and amplitudes in the process of propagations. © 2015 Springer Science+Business Media Dordrecht


Zhang S.,Bohai University | Gao X.-D.,Kashgar University
Open Physics | Year: 2015

In this paper, the AKNS isospectral problem and its corresponding time evolution are generalized by embedding three coefficient functions. Starting from the generalizedAKNS isospectral problem, a mixed spectralAKNS hierarchy with variable coefficients is derived. Thanks to the selectivity of these coefficient functions, the mixed spectral AKNS hierarchy contains not only isospectral equations but also nonisospectral equations. Based on a systematic analysis of the related direct and inverse scattering problems, exact solutions of the mixed spectral AKNS hierarchy are obtained through the inverse scattering transformation. In the case of reflectionless potentials, the obtained exact solutions are reduced to n-soliton solutions. This paper shows that the AKNS spectral problem being nonisospectral is not a necessary condition to construct a nonisospectral AKNS hierarchy and that the inverse scattering transformation can be used for solving some other variable-coefficient mixed hierarchies of isospectral equations and nonisospectral equations. © 2015 S. Zhang and X.-D. Gao.


PubMed | Xinjiang Academy of Animal Science, Shandong Academy of Sciences, Kashgar University, University of Eastern Finland and 8 more.
Type: Journal Article | Journal: Molecular biology and evolution | Year: 2016

Global climate change has a significant effect on extreme environments and a profound influence on species survival. However, little is known of the genome-wide pattern of livestock adaptations to extreme environments over a short time frame following domestication. Sheep (Ovis aries) have become well adapted to a diverse range of agroecological zones, including certain extreme environments (e.g., plateaus and deserts), during their post-domestication (approximately 8-9 kya) migration and differentiation. Here, we generated whole-genome sequences from 77 native sheep, with an average effective sequencing depth of 5for 75 samples and 42for 2 samples. Comparative genomic analyses among sheep in contrasting environments, that is, plateau (>4,000m above sea level) versus lowland (<100m), high-altitude region (>1500m) versus low-altitude region (<1300m), desert (<10mm average annual precipitation) versus highly humid region (>600mm), and arid zone (<400mm) versus humid zone (>400mm), detected a novel set of candidate genes as well as pathways and GO categories that are putatively associated with hypoxia responses at high altitudes and water reabsorption in arid environments. In addition, candidate genes and GO terms functionally related to energy metabolism and body size variations were identified. This study offers novel insights into rapid genomic adaptations to extreme environments in sheep and other animals, and provides a valuable resource for future research on livestock breeding in response to climate change.


Qiu T.,Qingdao Technological University | Yang G.,Kashgar University | Xiong J.,Kashgar University | Xu D.,Tianjin University of Technology and Education
Optics Communications | Year: 2016

We present two schemes of Lau effect for an object, an electromagnetically induced grating generated based on the electromagnetically induced effect. The Lau interference pattern is detected either directly in the way of the traditional Lau effect measurement with a classical thermal light being the imaging light, or indirectly and nonlocally in the way of two-photon coincidence measurement with a pair of entangled photons being the imaging light. © 2016 Elsevier B.V. All rights reserved.

Loading Kashgar University collaborators
Loading Kashgar University collaborators