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Search Results: 1 - 10 of 109888 matches for " LIU Zhi-jie. "
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First-principle study of native defects in CuScO2 and CuYO2

Fang Zhi-Jie,Shi Li-Jie,Liu Yong-Hui,

中国物理 B , 2008,
Abstract: This paper studies the electronic structure and native defects in transparent conducting oxides CuScOCu$M$OCu$M$O$_{2}$, native defects, vienna {\it ab-initio} simulation package (VASP)Project supported by the National Natural Science Foundation of China (Grant Nos 60325416, 60521001, 90301007 and 60576036).7125R,7155EThis paper studies the electronic structure and native defects in transparent conducting oxides CuScO$_{2}$ and CuYO$_{2}$ using the first-principle calculations. Some typical native copper-related and oxygen-related defects, such as vacancy, interstitials, and antisites in their relevant charge state are considered. The results of calculation show that, Cu$M$O$_{2}$($M=$ Sc, Y) is impossible to show n-type conductivity ability. It finds that copper vacancy and oxygen interstitial have relatively low formation energy and they are the relevant defects in CuScO$_{2}$ and CuYO$_{2}$. Copper vacancy is the most efficient acceptor, and under O-rich condition oxygen antisite also becomes important acceptor and plays an important role in p-type conductivity.
Adaptive Video Watermarking Algorithm Based on Matrix Scrambling
基于矩阵置乱的自适应视频水印算法

LIU Zhi-jie,LIU Yan-shen,
刘稚洁
,刘延申

中国图象图形学报 , 2005,
Abstract: Digital watermarking technology of video image is a hot topic in present watermarking researching area.In this paper,a adaptive video watermarking scheme based on MPEG-2 motion vectors is proposed,using matrix scrambling computing target group of pictures for watermark clip,combided human visual system,chosing target component motion for watermarks bit.Experimental show that it is robust to special video watermarks attack,and has faintness influence on the visual effect of pictures.
Diferrocenyl(methyl)phenylsilane
Yu-Peng Liu,Zong-Qi Li,Yong-Xia Tan,Zhi-Jie Zhang
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811014917
Abstract: In the title molecule, [Fe2(C5H5)2(C17H16Si)], the cyclopentadienyl rings linked to the same Fe atom are approximately eclipsed and the interplanar angles are 1.8 (2) and 3.4 (2)°. The Fe atom is slightly closer to the substituted cyclopentadienyl ring.
Ferrocenyl(methyl)diphenylsilane
Yu-Peng Liu,Zong-Qi Li,Yong-Xia Tan,Zhi-Jie Zhang
Acta Crystallographica Section E , 2011, DOI: 10.1107/s1600536811014796
Abstract: In the title molecule, [Fe(C5H5)(C18H17Si)], the distances of the Fe atom from the centroids of the unsubstituted and substituted cyclopentadienyl (Cp) rings are 1.651 (1) and 1.646 (1) , respectively. The dihedral angle between the two Cp rings is 3.20 (17)°. The crystal packing is mainly stabilized by van der Waals forces.
2,3:6,7-Bis(methylenedioxy)phenanthrene
Yuan-Xing Wang,Chong-Bo Liu,Zhi-Jie Fang,Ming-Yong Xie
Acta Crystallographica Section E , 2008, DOI: 10.1107/s1600536807065592
Abstract: In the title molecule, C16H10O4, all the non-H atoms are coplanar. The crystal structure is stabilized by weak intermolecular C—H...O contacts and π–π stacking interactions (the interplanar distance is 3.43 ).
Key Parameter Study of 65Mn Steel in Warm Rolling
Zhi-Jie Li,Yan Peng,Hong-Min Liu,Su-Fen Wang
Research Journal of Applied Sciences, Engineering and Technology , 2013,
Abstract: For study warm rolling process, warm compression experiment of ferrite combined with pearlite colony was conducted using the Gleeble-3500 thermal/mechanical simulator system. The warm deformation was carried out at temperature (500~700°C) and the strain rate (0.001~10/sec). Based on the flow stress data, the key parameter was calculated. The results show that the warm-working process of carbon steel conforms to hyperbolic sine equation. The relationship of and T could be described by parameter Z (temperature compensation of strain rate factor). The value of apparent n (stress index) and Q (deformation activation energy) was calculated, the draught pressure calculated was 1.87×104 t during warm rolling process at 600°C.
Preparation of TiO2 Nano―particles with Controllable Surface Charges for Electrophoretic Display
LIU Zhi-Jie, LI Xiang-Gao, WANG Shi-Rong
无机材料学报 , 2012, DOI: 10.3724/sp.j.1077.2012.00649
Abstract: Preparation of TiO2 nano―particles with controllable surface charges for electrophoretic display was investigated in ethylene tetrachloride, Isopar H and dodecylbenzene, in which TiO2 nano―particles were modified by anionic surfactants, cationic surfactants and polymers, respectively. The research results showed that TiO2 nano―particles modified by cationic surfactants had negative charges in ethylene tetrachloride, while it had positive charges in Isopar H and dodecylbenzene, the nano―particles modified by anionic surfactants had the opposite character. The influence of concentration of charge control agents on TiO2 nano―particles surface charges was discussed, in which TiO2 nano―particles were modified by sodium dodecylbenzenesulphonate, hexadecyl trimethyl ammonium bromide and styrene/divinylbenzene, respectively. It was shown that ξ potential of TiO2 nano―particles had a minimum value near the critical micelle concentrations of the charge control agents, and a regular change with the increasing concentration, while the property of ξ potential was still maintained. So, preparation of controllable surface charges of TiO2 nano―particles can be achieved.v
Bounds of automorphism groups of genus 2 fibrations
Zhi-Jie Chen
Mathematics , 1993,
Abstract: For a complex surface of general type with a relatively minimal genus 2 fibration, the bounds of the orders of the automorphism group of the fibration, of its abelian subgroups and of its cyclic subgroups are determined as linear functions of $c^2_1$. Most of them are the best.
An Evolutionary Algorithm with Multi-Local Search for the Resource-Constrained Project Scheduling Problem  [PDF]
Zhi-Jie Chen, Chiuh-Cheng Chyu
Intelligent Information Management (IIM) , 2010, DOI: 10.4236/iim.2012.23026
Abstract: This paper introduces a hybrid evolutionary algorithm for the resource-constrained project scheduling problem (RCPSP). Given an RCPSP instance, the algorithm identifies the problem structure and selects a suitable decoding scheme. Then a multi-pass biased sampling method followed up by a multi-local search is used to generate a diverse and good quality initial population. The population then evolves through modified order-based recombination and mutation operators to perform exploration for promising solutions within the entire region. Mutation is performed only if the current population has converged or the produced offspring by recombination operator is too similar to one of his parents. Finally the algorithm performs an intensified local search on the best solution found in the evolutionary stage. Computational experiments using standard instances indicate that the proposed algorithm works well in both computational time and solution quality.
Research on the ARMA-Based Traffic Prediction Algorithm for Wireless Sensor Network
基于ARMA的无线传感器网络流量预测模型的研究

Li Jie,Liu Xian-xing,Han Zhi-Jie,
李捷
,刘先省,韩志杰

电子与信息学报 , 2007,
Abstract: The importance of traffic prediction in Wireless Sensor Network (WSN) should not be disregarded. Concerning the ARMA model,a traffic prediction algorithm is proposed based on its own traffic characters. Simulation results show that the presented algorithm can provide high accuracy. Furthermore, using the proposed algorithm to improve the multi-paths route scheme can extend the lifetime of the whole WSN by remaining load evenly distributed among several paths.
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