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Remotely Sharing a Single-Qubit Operation with a Five-Qubit Genuine State

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Chinese Physics Letters 2013年第2期30卷 16-19页

作者： YE biao-Liang LIU Yi-Min LIU xian-Song zhang Zhan-Jun School of Physics&Material Science Anhui UniversityHefei 230039 Department of Physics Shaoguan UniversityShaoguan 512005

A three-party scheme for remotely sharing a single-qubit operation with Brown state and local operation and classical communication is *** discussions are made to show its important features,including determinacy,symm... 详细信息

关键词： operation discussions symmetry

An improved artificial bee colony algorithm for steelmaking–refining–continuous casting scheduling problem

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Chinese Journal of Chemical Engineering 2018年第8期26卷 1727-1735页

作者： Kunkun Peng Quanke Pan biao zhang State Key Laboratory of Digital Manufacturing Equipment and Technology Huazhong University of Science and Technology

Steelmaking–refining–Continuous Casting(SCC) scheduling is a worldwide problem, which is NP-hard. Effective SCC scheduling algorithms can help to enhance productivity, and thus make significant monetary savings. This paper develops an Improved Artificial Bee Colony(IABC) algorithm for the SCC scheduling. In the proposed IABC, charge permutation is employed to represent the solutions. In the population initialization, several solutions with certain quality are produced by a heuristic while others are generated randomly. Two variable neighborhood search neighborhood operators are devised to generate new high-quality solutions for the employed bee and onlooker bee phases, respectively. Meanwhile, in order to enhance the exploitation ability, a control parameter is introduced to conduct the search of onlooker bee phase. Moreover, to enhance the exploration ability,the new generated solutions are accepted with a control acceptance criterion. In the scout bee phase, the solution corresponding to a scout bee is updated by performing three swap operators and three insert operators with equal probability. Computational comparisons against several recent algorithms and a state-of-the-art SCC scheduling algorithm have demonstrated the strength and superiority of the IABC.

关键词： Artificial bee colony Steelmaking–refining–continuous casting Hybrid flowshop scheduling Variable neighborhood search

Quantum Correlations in a Family of Bipartite Qubit-Qutrit Separable States

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Chinese Physics Letters 2013年第2期30卷 20-23页

作者： YE biao-Liang LIU Yi-Min LIU xian-Song zhang Zhan-Jun School of Physics&Material Science Anhui UniversityHefei 230039 Department of Physics Shaoguan UniversityShaoguan 512005

Quantum correlations in a family of bipartite separable qubit-qutrit quantum-classical correlated states are investigated by using two popular measures,i.e.,the original quantum discord(OQD)method by Ollivier and Zurek[***.88(2001)017901]and the measurement-induced disturbance(MID)method by Luo[***.A 77(2008)022301].It is found that both of them are functions of a parameter partially characterizing the concerned states,however,quantum correlations evaluated via the convenient MID method are somewhat overestimated.

关键词： quantum bipartite concerned

One-step in situ encapsulation of Ge nanoparticles into porous carbon network with enhanced electron/ion conductivity for lithium storage

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Rare Metals 2021年第9期40卷 2432-2439页

作者： Xue Qiao Xue-biao Yang Na zhang xian-Ling Wang Ying-Ying Song Yong-Qing Zhai Dan Li Hong-Qiang Wang College of Chemistry and Environmental Science Hebei UniversityBaoding 071002China College of Chemistry and Molecular Engineering Zhengzhou UniversityZhengzhou 450001China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education) College of ChemistryNankai UniversityTianjin 300071China

Germanium(Ge) is considered to be one of the most promising anode materials due to the high theoretical capacity and excellent rate capability. However, its further development is hindered by the poor cycling stability caused by the severe volume change. Herein, we demonstrate a one-step in situ synthesis of Ge nanoparticles embedded into porous carbon framework(PC@Ge) using a facile sacrificial template method via the introduction of poly(methyl methacrylate) and subsequent thermal treatment. This unique nanoarchitecture not only enhances lithium-ion diffusivity and electron conductivity, but also effectively buffers the huge volume expansion and protects the Ge nanoparticles from cracking and aggregation during the cycling. Consequently, the as-prepared PC@Ge electrode exhibits superior capacity retention of 75% and 87%over 1000 cycles at 1.0 and 2.0 A·g^(-1), respectively.

关键词： Lithium-ion batteries Germanium nanoparticle In situ synthesis Porous carbon frameworks Lithium-ion diffusivity

Accuracy Analysis and Design of A3 Parallel Spindle Head

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Chinese Journal of Mechanical Engineering 2016年第2期29卷 239-249页

作者： NI Yanbing zhang biao SUN Yupeng zhang Yuan School of Mechanical Engineering Tianjin University Tianjin 300072 China China Faw Group Corporation R&D Center Changchun 130000 China

As functional components of machine tools, parallel mechanisms are widely used in high efficiency machining of aviation components, and accuracy is one of the critical technical indexes. Lots of researchers have focused on the accuracy problem of parallel mechanisms, but in terms of controlling the errors and improving the accuracy in the stage of design and manufacturing, further efforts are required. Aiming at the accuracy design of a 3-DOF parallel spindle head（A3 head）, its error model, sensitivity analysis and tolerance allocation are investigated. Based on the inverse kinematic analysis, the error model of A3 head is established by using the first-order perturbation theory and vector chain method. According to the mapping property of motion and constraint Jacobian matrix, the compensatable and uncompensatable error sources which affect the accuracy in the end-effector are separated. Furthermore, sensitivity analysis is performed on the uncompensatable error sources. The sensitivity probabilistic model is established and the global sensitivity index is proposed to analyze the influence of the uncompensatable error sources on the accuracy in the end-effector of the mechanism. The results show that orientation error sources have bigger effect on the accuracy in the end-effector. Based upon the sensitivity analysis results, the tolerance design is converted into the issue of nonlinearly constrained optimization with the manufacturing cost minimum being the optimization objective. By utilizing the genetic algorithm, the allocation of the tolerances on each component is finally determined. According to the tolerance allocation results, the tolerance ranges of ten kinds of geometric error sources are obtained. These research achievements can provide fundamental guidelines for component manufacturing and assembly of this kind of parallel mechanisms.

关键词： A3 head error model sensitivity analysis tolerance allocation

Fabrication of Fluorescent Porphyrin/Polystyrene Composite Nanospheres by Electrospinning

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Chemical Research in Chinese Universities 2010年第1期26卷 148-151页

作者： SONG Yan ZHAN Nai-qian YU Miao YANG Qing-biao zhang Chao-qun LI Yao-xian College of Chemistry Jilin University Changchun 130021 P. R. China School of Chemical and Material Engineering Jilin Institute of Chemical Techology Jilin 132022 P. R. China

Fluorescent polystyrene（PS）/porphyrin（TPPA） composite nanospheres were successfully fabricated by electrospinning. The SEM images clearly show that owing to adding TPPA in PS, the averaged diameter of the composite nanospheres became smaller, from 1500 to 580 nm. Fourier-transform infrared（FTIR） spectra determined the chemical composition of the resulting PS/TPPA composite nanospheres. The photoluminescent（PL） spectral analysis indicates that the peak position of the composite nanospheres in either solid state or water is identical to that of pure TPPA, at about 652 nm, and is still unchangeable when they are left for at least 20 d, indicating the stable photoluminescent property of the fluorescent composite nanospheres.

关键词： Polystyrene Porphyrin Fluorescent Composite nanosphere Electrospinning

An Efficient Boron Source Activation Strategy for the Low‑Temperature Synthesis of Boron Nitride Nanotubes

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Nano-Micro Letters 2025年第1期17卷 548-558页

作者： Ying Wang Kai zhang Liping Ding Liyun Wu Songfeng E Qian He Nanyang Wang Hui Zuo Zhengyang Zhou Feng Ding Yue Hu Jin zhang Yagang Yao National Laboratory of Solid State Microstructures College of Engineering and Applied SciencesJiangsu Key Laboratory of Artificial Functional Materialsand Collaborative Innovation Center of Advanced MicrostructuresNanjing UniversityNanjing 210093People’s Republic of China School of Electronic Information and Artificial Intelligence Shaanxi University of Science&TechnologyXian 710000People’s Republic of China College of Bioresources Chemical and Materials Engineering Shaanxi University of Science&TechnologyXian 710000People’s Republic of China Key Laboratory of Carbon Materials of Zhejiang Province College of Chemistry and Materials EngineeringWenzhou UniversityWenzhou 325000People’s Republic of China Shenzhen Institutes of Advanced Technology Chinese Academy of SciencesShenzhen 518000People’s Republic of China College of Chemical and Molecular Engineering Peking UniversityBeijing 100871People’s Republic of China

Lowering the synthesis temperature of boron nitride nanotubes(BNNTs)is crucial for their *** primary reason for adopting a high temperature is to enable the effective activation of highmelting-point solid *** this study,we developed a novel approach for efficiently activating boron by introducing alkali metal compounds into the conventional MgO–B *** approach can be adopted to form various low-melting-point AM–Mg–B–O growth *** growth systems have improved catalytic capability and reactivity even under low-temperature conditions,facilitating the synthesis of BNNTs at temperatures as low as 850℃.In addition,molecular dynamics simulations based on density functional theory theoretically demonstrate that the systems maintain a liquid state at low temperatures and interact with N atoms to form BN *** findings offer novel insights into the design of boron activation and are expected to facilitate research on the low-temperature synthesis of BNNTs.

关键词： Boron nitride nanotubes Low-temperature Boron activation Density functional theory

ID-WAVELETS METHOD FOR HAMMERSTEIN INTEGRAL EQUATIONS

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Journal of Computational Mathematics 1998年第6期16卷 499-508页

作者： xian-biao Wang Wei Lin (Department of Mathematics, Zhongshan University, Guangzhou 510275, China) Zhongshan Univ Dept Math Canton 510275 Peoples R China

The numerical solutions to the nonlinear integral equations of Hammerstein-type y(t) = f(t) + integral(0)(1)k(t, s)g(s, y(s))ds, t is an element of [0,1] are investigated. A degenerate kernel scheme basing on ID-wavelets combined with a new collocation-type method is presented. The Daubechies interval wavelets and their main properties are briefly mentioned. The rate of approximation solution converging to the exact solution is given. Finally we also give two numerical examples.

关键词： nonlinear integral equation interval wavelets degenerate kernel

Transferring CdTe Nanoparticles from Liquid Phase to Polyvinylpyrrolidone Nanofibers by Electrospinning and Detecting Its Photoluminescence Property

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Chemical Research in Chinese Universities 2008年第4期24卷 459-463页

作者： WANG Shu-gang YANG Qing-biao BAI Jie SONG Yan zhang Chao-qun LI Yao-xian Department of Organic Chemistry College of Chemistry Jilin University Changchun 130021 P R. China

The major aim of this work was to synthesize thio-stabilized CdTe nanoparticles（NPs） in an aqueous solution, which was then enwrapped with cetyltrimethylammonium bromide（CTAB）, and finally transferred to the polyvinylpyrrolidone（PVP） matrix by electrospinning. The PVP nanofibers containing CdTe NPs were characterized by scanning electron microscopy（SEM） and transmission electron microscopy（TEM）, to observe the morphology of the nanofibers and the distribution of CdTe NPs. The selective area electronic diffraction（SAED） pattern verified that CdTe NPs were cubic lattice. The photoluminescence（PL） spectrum indicated that CdTe NPs existed in an optical style in PVP nanofibers. Moreover, X-ray photoelectron spectra（XPS） revealed that thiol-stabilized CdTe NPs were enwrapped by CTAB, and PVP acted as a dispersant in the process of electrospinning.

关键词： CTAB Electrospinning Nanofiber Nanoparticle Photoluminescence