Kashgar Teachers College

Kashi, China
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Liu W.,Xinjiang Institute of Engineering | Liu L.,Xinjiang Institute of Light Industry | Zhang T.,Xinjiang Agricultural University | Liu J.,Kashgar Teachers College
Proceedings - 2016 9th International Symposium on Computational Intelligence and Design, ISCID 2016 | Year: 2017

In order to improve the searching speed and the quality of global optimal solution, we propose an improved algorithm based on Artificial Bee Colony(ABC) algorithm, which can search the space by stochastic optimization and dynamic regulation (named SRABC). Firstly, the improved algorithm can update the next location of ABC algorithm, which can perfect the correlation for the bee colony. Secondly, we used the dynamic regulation to search for fitness function by restraining the direction, the approach can improve local search ability effectively. By testing 5 multimodal functions, the simulation results show that the SRABC algorithm has significant improvements in convergence rate and precision rate of global optimal solution. © 2016 IEEE.

Guo L.-Y.,Central China Normal University | Li M.-H.,Ningbo University | Huang X.-J.,Central China Normal University | Huang X.-J.,Kashgar Teachers College | Yang H.-L.,Central China Normal University
Applied Physics Letters | Year: 2014

Electric toroidal dipolar response has been achieved by metamaterial based on sun-like aperture element at microwave frequency. It is confirmed numerically by scattered powers that the electric toroidal dipolar moment dominates over other moments at the corresponding resonance. This proposed metamaterial exhibits resonant transparency under linearly polarized incidence caused by destructive interference between magnetic dipole and electric toroidal dipole. Notably, it also provides circular cross-polarization conversions between left-handed circularly polarized wave and right-handed circularly polarized wave at the same frequency. These properties associated with elusive electric toroidal dipolar moment offer an avenue for various potential applications in microwave devices. © 2014 AIP Publishing LLC.

Huang X.,Central China Normal University | Huang X.,Kashgar Teachers College | Yang D.,Hubei Normal University | Yang H.,Central China Normal University
Journal of Applied Physics | Year: 2014

A multiple-band metamaterial reflective polarization converter (RPC) is proposed, which is composed of the dielectric substrate sandwiched with U-shaped metallic patterns and continuous metal film. The proposed U-shaped metamaterial RPC (UMM-RPC) can convert a linearly polarized wave to its cross polarized wave at the three resonant frequencies, which also can convert the linearly polarized wave to circularly polarized wave at other three resonant frequencies. Furthermore, the proposed UMM-RPC can maintain the same conversional direction at the three resonant frequencies when incident on a circularly polarized wave. The simulated and measured results are in agreement in the entire frequency range, and the polarization conversion ratio is over 90% for both linear and circular polarizations. The surface current distributions of the UMM-RPC are discussed to look into the physical mechanism. The proposed UMM-RPC has simple geometry but more operating frequency bands compared to the previous designs and can be used in applications such as antenna radome, remote sensors, and radiometer. © 2014 AIP Publishing LLC.

Huang X.,Central China Normal University | Huang X.,Kashgar Teachers College | Yang D.,Central China Normal University | Yu S.,Kashgar Teachers College | And 3 more authors.
Applied Physics B: Lasers and Optics | Year: 2014

A bilayered chiral metamaterial with Π-shaped structure is proposed, which demonstrates to exhibit dual-band asymmetric transmission (AT) of linearly polarized electromagnetic (EM) waves in two opposite directions. Incident x-polarized wave is almost converted to y-polarized wave while incident y-polarized wave is locked through the Π-shaped slab at 10.82 GHz; incident y-polarized wave is almost converted to x-polarized wave while incident x-polarized wave cannot pass through the Π-shaped slab at 14.1 GHz. The property of the AT is similar to the diode-switching characteristics, and the EM wave can be switched on/off by changing the polarization state of the incident wave. The surface current distributions of the Π-shaped structure are discussed to look into the physical mechanism. © 2014, Springer-Verlag Berlin Heidelberg.

Huang X.,Central China Normal University | Huang X.,Kashgar Teachers College | Yang H.,Central China Normal University | Yu S.,Kashgar Teachers College | And 3 more authors.
Journal of Applied Physics | Year: 2013

The design, fabrication, and measurement of a triple-band metamaterial absorber are presented. The proposed absorber consists of a metallic planar spiral layer and a metallic ground plane separated by a dielectric layer. Experimental results show that the proposed absorber can perform absorption peaks at three resonant frequencies 9.86 GHz, 12.24 GHz, and 15.34 GHz with the absorption of 99.4%, 96.7%, and 99.1%, respectively. In addition, the absorber with the thickness of λ/35 at the lowest fundamental resonant frequency can operate at a wide range of incident angles under both transverse electric and transverse magnetic polarizations. © 2013 AIP Publishing LLC.

Huang X.,Central China Normal University | Huang X.,Kashgar Teachers College | Xiao B.,Yangtze University | Yang D.,Central China Normal University | Yang H.,Central China Normal University
Optics Communications | Year: 2014

A three-layer bi-anisotropic metamaterial (B-AM) is proposed to realize a 90° polarization rotator in an ultra-broadband frequency range of 5.8-11.8 GHz, which can convert the linearly polarized wave into its cross-polarized wave for propagating directions. Simulated and measured results show that the ratio of polarization conversion (PCR) of the three-layer B-AM is nearly 90% and FWHM is more than 68%. In addition, the three-layer B-AM can achieve asymmetric transmission (AT) for forward and backward propagations of linearly polarized waves. The proposed three-layer B-AM has simple geometry and wider operating frequency bands comparing to the previous designs. The physical mechanism of the ultra-broadband linear polarization conversion effect is illustrated by simulated surface current distributions of the structure. © 2014 Elsevier B.V. All rights reserved.

Chen M.,Shanghai Ocean University | Xu X.,Shanghai Ocean University | Zhang S.,Kashgar Teachers College | Feng G.,Shanghai Ocean University
Applied Mechanics and Materials | Year: 2013

Energy consumption phenomenon has always been noticed in sink-based wireless sensor networks. This paper explored an energy efficient routing protocol with a mobile sink based on the shortest path data transmission mode. According to the position of the sink node and the common nodes' ID in the network, we calculated the coordinate value of each node in the network. By comparing the coordinate values to choose the shortest path to forward the data. Simulation results show that this method can prolong the lifetime of the network and improve the energy utilization ratio of nodes. © (2013) Trans Tech Publications, Switzerland.

Abdukayum A.,Nankai University | Abdukayum A.,Kashgar Teachers College | Yang C.-X.,Nankai University | Zhao Q.,Nankai University | And 3 more authors.
Analytical Chemistry | Year: 2014

The development of multimodal nanoprobes that combined properties of near-infrared (NIR) fluorescence and magnetic resonance imaging (MRI) within a single probe is very important for medical diagnosis. The NIR-emitting persistent luminescent nanoparticles (PLNPs) are ideal for optical imaging owing to no need for in situ excitation, the absence of background noise, and deep tissue penetration. However, no PLNP based multimodal nanoprobes have been reported so far. Here, we report a novel multimodal nanoprobe based on the gadolinium complexes functionalized PLNPs (Gd(III)-PLNPs) for in vivo MRI and NIR luminescence imaging. The Gd(III)-PLNPs not only exhibit a relatively higher longitudinal relaxivity over the commercial Gd(III)-diethylenetriamine pentaacetic acid complexes but also keep the superlong persistent luminescence. The prepared Gd(III)-PLNPs multimodal nanoprobe offers great potential for MRI/optical imaging in vivo. © 2014 American Chemical Society.

Turson M.,Nankai University | Turson M.,Kashgar Teachers College | Zhou M.,Nankai University | Jiang P.,Nankai University | Dong X.,Nankai University
Journal of Separation Science | Year: 2011

The "living"/controlled radical polymerization has provided an opportunity in making a more homogeneous polymer, which is favorable for polymer-based monolithic column fabrication. To study its application in the preparation of separation material, a capillary poly(ethylhexyl methacrylate-co-ethylene dimethacrylate) monolithic column has been synthesized by reversible addition-fragmentation chain transfer (RAFT) polymerization. The correlation between the synthetic conditions and the polymer structures and separation performance was studied. The result indicated RAFT-mediated reaction provides condition for creating polymers with narrower pore size distribution and higher column efficiency compared with traditional polymerization. The "living" property of the RAFT polymerization was further utilized to graft hydrophilic polymer on the surface of poly(ethylhexyl methacrylate-co- ethylene dimethacrylate). The hydrophilic chain modified monolithic column has both abilities of protein exclusion and small hydrophobic compound retention. The result indicated that RAFT polymerization can be used for making multifunctional material. The restricted access monolithic material synthesized by this method can be used in biological sample analysis with HPLC direct injection. Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Wang D.,Kashgar Teachers College
Acta Crystallographica Section E: Structure Reports Online | Year: 2011

In the title complex, [Ni(C11H16N3O)] Cl·2H2O, the NiII ion is coordinated within a distorted square-planar environment. In the crystal, intermolecular N - H⋯Cl, N - H⋯O, O - H⋯O, O - H⋯Cl and weak C - H⋯O hydrogen bonds link the components into a two-dimensional network parallel to (001).

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