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Quantum secure direct dialogue using Einstein-Podolsky-Rosen pairs

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Science China(Physics,Mechanics & Astronomy) 2014年第7期57卷 1238-1243页

作者： zheng chao LONG GuoFei State Key Laboratory of Low-Dimensional Quantum Physics and Department of Physics Tsinghua University Tsinghua National Laboratory for Information Science and Technology Department of Physics Shandong University Department of Physics Loughborough University

A two-step quantum secure direct dialogue protocol using Einstein-Podolsky-Rosen(EPR)pair block is *** the protocol,the dialogue messages are encoded on series of qubits and sent through a quantum channel *** security of the protocol is assured by its connection to the two-step quantum secure direct communication protocol,which has been proved *** protocol has several *** is a direct communication protocol that does not require a separate classical communication for the *** has high capacity as two bits of secret messages can be transmitted by an EPR *** a dialogue protocol,the two parties can speak to each other either simultaneously or sequentially.

关键词： quantum communication QSDC QSDD EPR pairs

Fast Near-duplicate Image Detection in Riemannian Space by A Novel Hashing Scheme

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Computers, Materials & Continua 2018年第9期56卷 529-539页

作者： Ligang zheng chao Song Guangzhou University Guangzhou High Education Mega CenterGuangzhou510006China Illinois Institute of Technology 3440 South DearbornSuit 100ChicagoIL60616USA

There is a steep increase in data encoded as symmetric positive definite(SPD)matrix in the past *** set of SPD matrices forms a Riemannian manifold that constitutes a half convex cone in the vector space of matrices,which we sometimes call SPD *** of the fundamental problems in the application of SPD manifold is to find the nearest neighbor of a queried SPD *** is a popular method that can be used for the nearest neighbor ***,hashing cannot be directly applied to SPD manifold due to its non-Euclidean intrinsic *** by the idea of kernel trick,a new hashing scheme for SPD manifold by random projection and quantization in expanded data space is proposed in this *** results in large scale nearduplicate image detection show the effectiveness and efficiency of the proposed method.

关键词： Riemannian manifold congruent transformation hashing kernel trick

Post-spin crossing dynamics determine the regioselectivity in open-shell singlet biradical recombination

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Organic Chemistry Frontiers 2022年第4期9卷 995-1003页

作者： Min Zhu chao zheng State Key Laboratory of Organometallic Chemistry Shanghai Institute of Organic ChemistryChinese Academy of Sciences345 Lingling LuShanghai 200032China School of Physical Science and Technology ShanghaiTech University100 Haike RoadShanghai 201210China

Radical recombination is among the fastest reactions in organic *** high levels of selectivity in this type of reaction is rather *** a recent report on visible-light-induced dearo-mative cycloaddition of pyrrole-tethered vinylcyclopropanes,extraordinary regioselectivity was observed during the intramolecular open-shell singlet biradical recombination step.

关键词： singlet radical regioselectivity

An Isogeometric Cloth Simulation Based on Fast Projection Method

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Computer Modeling in Engineering & Sciences 2023年第3期134卷 1837-1853页

作者： Xuan Peng chao zheng Department of Mechanical Engineering Suzhou University of Science and TechnologySuzhou215009China Simshow High Technology Co. Ltd.Chengdu610042China Department of Mechanical and Industrial Engineering The University of IowaIowa CityIA 52242-1527USA

A novel continuum-based fast projection scheme is proposed for cloth *** geometry is described by NURBS,and the dynamic response is modeled by a displacement-only Kirchhoff-Love shell element formulated directly on NURBS *** fast projection method,which solves strain limiting as a constrained Lagrange problem,is extended to the continuum *** examples are studied to demonstrate the performance of the current *** proposed approach can be applied to grids of arbitrary topology and can eliminate unrealistic over-stretching efficiently if compared to spring-based methodologies.

关键词： Cloth simulation isogeometric analysis strain limiting fast projection

Universality of Competitive Networks in Complex Networks

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Journal of Systems Science & Complexity 2015年第3期28卷 546-558页

作者： GUO jinli FAN chao ji Yali Business School University of Shanghai for Science and Technology

The paper proposes a model which helps to investigate the competitive aspect of real networks in quantitative terms. Through theoretical analysis and numerical simulations, it shows that the competitive model has the universality for a weighted network. The relation between parameters in the weighted network and the competitiveness in the competitive network is obtained by theoretical analysis. Based on the expression of the degree distribution of the competitive network, the strength and degree distributions of the weighted network can be calculated. The analytical solution reveals that the degree distribution of the weighted network is correlated with the increment and initial value of edge weights, which is verified by numerical simulations. Moreover, the evolving pattern of a clustering coefficient along with network parameters such as the size of a network, an updating coefficient, an initial weight and the competitiveness are obtained by further simulations.

关键词： Competitive network complex network scale-free network weighted network.

Lactulose enhances neuroplasticity to improve cognitive function in early hepatic encephalopathy

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Neural Regeneration Research 2015年第9期10卷 1457-1462页

作者： Nan Yang He Liu Yao jiang ji zheng Dong-mei Li chao ji Yan-yong Liu Ping-ping Zuo Department of Pharmacology Institute of Basic Medical Sciences Chinese Academy of Medical Sciences & School of Basic Medicine Peking Union Medical College

Lactulose is known to improve cognitive function in patients with early hepatic encephalopa- thy; however, the underlying mechanism remains poorly understood. In the present study, we investigated the behavioral and neurochemical effects of lactulose in a rat model of early hepatic encephalopathy induced by carbon tetrachloride. Immunohistochemistry showed that lactulose treatment promoted neurogenesis and increased the number of neurons and astrocytes in the hippocampus. Moreover, lactulose-treated rats showed shorter escape latencies than model rats in the Morris water maze, indicating that lactulose improved the cognitive impairments caused by hepatic encephalopathy. The present findings suggest that lactulose effectively improves cog- nitive function by enhancing neuroplasticity in a rat model of early hepatic encephalopathy.

关键词： nerve regeneration brain injury hepatic encephalopathy lactulose neuroplasticity neurogenesis Morris water maze cognition rats neuronal nuclei glial fibrillary acidic protein NSFC grants neural regeneration

Enhanced cooperative packet retransmission employing joint cooperative diversity and symbol mapping diversity

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2008年第8期9卷 1090-1098页

作者： Wei ji Bao-yu zheng Electronic Engineering Department Shanghai Jiao Tong University Shanghai 200240 China Institute qf Signal Processing and Transmission Nanjing University of Posts ＆ Telecommunications Nanjing 210003 China

A joint cooperation diversity and symbol mapping diversity (SMD) strategy is proposed for cooperative packet retransmission system with high-order modulation such as 16QAM. Substantial SER/BER (symbol error rate/bit error rate) gains result from multiple packet transmissions over independent paths and distinct bit-to-symbol mappings for each packet transmis-sion. The SER/BER performance of relay assisted retransmission system is analyzed. Simulation results show that the joint-diversity strategy can provide more BER gains than other relaying strategies (i.e., decode-and-forward and constellation rearrangement relaying strategies) when no relay makes a decision error; but if some relays make decision errors, the joint-di-versity strategy outperforms other relaying strategies only when the relays are closer to the source than to the destination.

关键词： Cooperative retransmission Hybrid automatic repeat request (HARQ) Cooperative diversity Symbol mapping diversity (SMD)

Numerical investigation on the drag reduction properties of a suction controlled high-rise building

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2010年第7期11卷 477-487页

作者： chao-rong zheng Yao-chun ZHANG School of Civil Engineering Harbin Institute of Technology Harbin 150090 China

To reduce the wind-induced drag and improve the wind-resistance performance of a high-rise building, steady suction control is introduced into the building structure. Based on validation of the numerical methods by experiment with suction control over the flow separation of a 3D backward-facing step, the Reynolds stress equation model is used to investigate the drag reduction (DR) properties of a high-rise building whose side faces are controlled by all-height suction. Effects of the orifice geometrical parameters and suction flux parameters on the DR and the separation control are analyzed, and the detailed flow fields are shown to clarify the mechanism of suction control. The results indicate that suction control is very effective in reducing the wind loads on the high-rise building model, and only the dimensionless suction flux dominates. Lastly, the power consumed and the counterforce induced by suction are discussed, the suction models become the "zero-drag" model under certain suction angles.

关键词： High-rise building Numerical simulation Suction control Drag reduction (DR) Power Mechanism analysis

Coordinated Bayesian optimal approach for the integrated decision between electronic countermeasure and firepower attack

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Journal of Systems Engineering and Electronics 2010年第3期21卷 449-454页

作者： zheng Tang Xiaoguang Gao chao Sun School of Marine Engineering Northwestern Polytechnical University Xi'an 710072 R R. China School of Electronics and Information Northwestern Polytechnical University Xi'an 710129 P. R. China

The coordinated Bayesian optimization algorithm（CBOA） is proposed according to the characteristics of the function independence,conformity and supplementary between the electronic countermeasure（ECM） and the firepower attack *** selection criteria are combinations of probabilities of individual fitness and coordinated degree and can select choiceness individual to construct Bayesian network that manifest population evolution by producing the new *** the CBOA cannot only guarantee the effective pattern coordinated decision-making mechanism between the populations,but also maintain the population multiplicity,and enhance the algorithm *** simulation result confirms the algorithm validity.

关键词： electronic countermeasure firepower attack coordinated Bayesian optimization algorithm(CBOA).