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An efficient trust negotiation strategy towards the resource-limited mobile commerce environment

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Frontiers of Computer Science 2016年第3期10卷 543-558页

作者： Bailing LIU Yanhui LI bing zeng Chao LEI School of Information Management Central China Normal University Wuhan 430079 China School of Software Engineering South China University of Technology Guangzhou 510006 China

Automated trust negotiation （ATN） offers an at- tractive means for trust establishments, which establishes mu- tual trust among strangers wishing to share resources or con- duct business, but it comes at the cost of non-trivial computa- tion and communication overheads. The deployment of ATN strategies on a resource-constrained mobile device may lead to user-obstructive latency for operations. In this paper, we propose a trust negotiation strategy called trust target Petri nets negotiation strategy （TPNNS）. It highly reduces the ne- gotiation latency in the mobile device compared with other negotiation strategies, since it considers all the alternative re- sponses at each step and chooses the best one. TPNNS sup- ports cycle avoidance and employs skipped TPN which is a new approach presented in this paper. What is more, it is complete and ensures no irrelevant credentials are disclosed during the trust negotiation.

关键词： automated trust negotiation mobile commerce,negotiation strategy Petri net

Einstein-Podolsky-Rosen Entanglement and Quantum Nonlocality for an Electron in a Uniform Magnetic Field

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Chinese Physics Letters 2000年第5期17卷 316-318页

作者： FAN Hong-Yi CHEN zeng-bing Department of Applied Physics Shanghai Jiao Tong UniversityShanghai 200030 Department of Material Science and Engineering University of Science and Technology of ChinaHefei 230026

Ws show that there exists the precise Einstein-Podolsky-Rosen entanglement for an electron in a uniform magnetic ***,the x-and y-coordinates of the electron as well as the corresponding canonical momenta px and Pv become sharply correlated,which is a novel fact unnoticed *** a harmonic potential is added to the system,the original vacuum state of the system becomes a squeezed vacuum state,whose quantum nonlocality is then demonstrated.

关键词： Einstein vacuum Uniform

New Stability Criteria for Recurrent Neural Networks with a Time-varying Delay

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International Journal of Automation and computing 2011年第1期8卷 128-133页

作者： Hong-bing zeng Shen-Ping Xiao Bin Liu School of Electrical and Information Engineering Hunan University of Technology Zhuzhou 412008 PRC School of Information Science and Engineering Central South University Changsha 410083 PRC School of Engineering Australian National University ACT 0200 Australia

This paper deals with the stability of static recurrent neural networks （RNNs） with a time-varying delay. An augmented Lyapunov-Krasovskii functional is employed, in which some useful terms are included. Furthermore, the relationship among the timevarying delay, its upper bound and their difierence, is taken into account, and novel bounding techniques for 1- τ（t） are employed. As a result, without ignoring any useful term in the derivative of the Lyapunov-Krasovskii functional, the resulting delay-dependent criteria show less conservative than the existing ones. Finally, a numerical example is given to demonstrate the effectiveness of the proposed methods.

关键词： Stability recurrent neural networks (RNNs) time-varying delay delay-dependent augmented Lyapunov-Krasovskii functional.

Layer-by-layer assembly of chitosan and carbon nanotube on cotton fabric for strain and temperature sensing

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Journal of Materials Science & Technology 2024年第6期173卷 114-120页

作者： Ye-Xin Zhang Yi-Dong Li An-Ke Du Yuanpeng Wu Jian-bing zeng Chongqing Key Laboratory of Soft-Matter Material Chemistry and Function Manufacturing School of Chemistry and Chemical EngineeringSouthwest UniversityChongqing 400715China Chongqing Academy of Science and Technology Chongqing 401123China School of New Energy and Materials State Key Laboratory of Oil and Gas Reservoir Geology and ExploitationSouthwest Petroleum UniversityChengdu 610500China

Layer-by-layer(LBL)assembly shows great potential in fabrication of flexible conductive cotton fabrics(FCCF)with carbon nanotubes(CNT)as conductive components but is limited because complicated chemical modification of CNT is usually ***,we reported a facile and eco-friendly LBL approach to fabricating FCCF by dipping in chitosan(CS)aqueous solution and poly(sodium 4-styrenesulfonate)(PSS)wrapped CNT aqueous dispersion *** FCCF with electrical conductivity higher than 30 S/m was achieved when 4 layers of CNT were coated on the cotton fabric(CF).The obtained FCCF possessed outstanding mechanical stability with electrical resistivity almost unchanged after exposure to 500 times mechanical abrasion and 500 circles of tape *** FCCF showed excellent strain sensing performance with high sensitivity(with a gauge factor up to 35.1)and a fast response time(70 ms).It can be used as a strain sensor to accurately detect various human deformations such as finger bending and joint *** FCCF could be used as a temperature sensor in that it exhibited stable and reproducible negative temperature sensing behavior in the temperature range of 30-100℃.

关键词： Flexible conductive cotton fabric Layer-by-layer Temperature sensing Strain sensing

Reprocessible Epoxy Networks with Tunable Physical Properties:Synthesis,Stress Relaxation and Recyclability

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Chinese Journal of Polymer Science 2018年第5期36卷 641-648页

作者： Jia-Hui Chen Xu-Pei An Yi-Dong Li Ming Wang Jian-bing zeng School of Chemistry and Chemical Engineering Southwest University

In order to extend the application of epoxy vitrimer, 1,4-cyclohexanedicarboxylic acid（CHDA） was used as a co-curing agent and structure modifier for sebacic acid（SA） cured diglycidyl ether of bisphenol A（DGEBA） epoxy vitrimer to tailor the mechanical properties of epoxy vitrimers with 1,5,7-triazabicylo[4.4.0]dec-5-ene（TBD） as a transesterification catalyst. The glass transition temperature（Tg） of vitrimer increased gradually with the increase in CHDA content. Vitrimers behaved from elastomer to tough and hard plastics were successfully achieved by varying the feed ratio of CHDA to SA. Both the Young＇s modulus and storage modulus increased apparently with the increase in CHDA content. Stress relaxation measurement indicated that more prominent stress relaxation occurred at elevated temperatures and the stress relaxation decreased with the increase of CHDA content due to the reduced mobility of the vitrimer backbone. The vitrimers showed excellent recyclability as evidenced by the unchanged gel fraction and mechanical properties after compression molded for several times. With tunable mechanical properties, the epoxy vitrimers may find extensive potential applications.

关键词： Epoxy vitrimer Mechanical properties Stress-relaxation Recyclability

A New Approach to Urban Rainwater Management

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Journal of China University of Mining and Technology 2007年第1期17卷 82-84页

作者： zeng bing TAN Hai-qiao WU Li-juan School of Resource and Earth Sciences China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China

Based on an analysis of our research results and the main problems relating to urban rainwater treatment, we propose a new approach to urban rainwater management in China. The necessity and feasibility of such a new approach are discussed. From an ecological point of view all components of the global system, including residents living in cities, have the same right to enjoy rainwater. Therefore, urban rainwater should neither be simply drained as waste water, nor be completely harvested as a kind of resource. The objective of this new approach is to maintain the natural hydrological cycle in urban areas during urbanization. When necessary, it could also be used to regulate the amount of runoff, evaporation and infiltration in a city in order to rehabilitate the hydrological cycle given the local conditions. Three basic principles should be adopted in rainwater management, i.e., separation of rainfall from sewage, limited utilization and small and decentralized facilities. Four methods can be used for urban rainwater management: rainwater harvest, rainwater infiltration, rainwater storage and rainwater pipes. The natural hydrological cycle in urban areas could be rehabilitated through rainwater management, which is of great importance for sustainable development of our cities.

关键词： urban rainwater management hydrological cycle rehabilitation

Unlocking the Potential of Poly(butylene succinate)through Incorporation of Vitrimeric Network Based on Dynamic Imine Bonds

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Chinese Journal of Polymer Science 2024年第10期42卷 1414-1424,I0006页

作者： Shan-Song Wu Hui-Juan Lu Yi-Dong Li Shui-Dong Zhang Jian-bing zeng Chongqing Key Laboratory of Soft-Matter Material Manufacturing School of Chemistry and Chemical EngineeringSouthwest UniversityChongqing400715China School of Mechanical and Automotive Engineering South China University of TechnologyGuangzhou510640China

Poly(butylene succinate)(PBS)exhibits many advantages,such as renewability,biodegradability,and impressive thermal and mechanical properties,but is limited by the low melt viscosity and strength resulted from the linear *** address this,vitrimeric network was introduced to synthesize PBS vitrimers(PBSVs)based on dynamic imine bonds through melt polymerization of hydroxyl-terminated PBS with vanillin derived imine containing compound and hexamethylene diisocyanate using trimethylolpropane as a crosslinking *** with different crosslinking degrees were synthesized through changing the content of the crosslinking *** effect of crosslinking degree on the thermal,theological,mechanical properties,and stress relaxation behavior of the PBSVs was studied in *** results demonstrated that the melt viscosity,melt strength,and heat resistance were enhanced substantially without obvious depression in crystallizability,thermal stability,and mechanical properties through increasing crosslinking *** addition,the PBSVs exhibit thermal reprocessability with mechanical properties recovered by more than 90%even after processing for three ***,PBSV with improved melt properties shows significantly improved foamability compared to commercial *** research contributes to the advancement of polymer technology by successfully developing PBS vitrimers with improved properties,showcasing their potential applications in sustainable and biodegradable materials.

关键词： Poly(butylene succinate) Vitrimer Imine bonds Foamability

Efficient Gene Transfer Mediated by HIV-1-based Defective Lentivector and Inhibition of HIV-1 Replication

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中国病毒学 2007年第4期22卷 266-279页

作者： Ling-bing zeng Lin-bai YE Yuanan LU Yangtze River Fisheries Research Institute Chinese Academy of Fishery Sciences Jingzhou 434000 China Retrovirology Research Laboratory Pacific Biosciences Research Center University of Hawaii at Manoa Honolulu Hawaii 96822 USA College of Life Sciences Wuhan University Wuhan 430072 China

Lentiviral vectors have drawn considerable attention recently and show great promise to become important delivery vehicles for future gene transfer manipulation. In the present study we have optimized a protocol for preparation of human immunodeficiency virus type-1 (HIV-1)-based defective lentiviral vectors (DLV) and characterized these vectors in terms of their transduction of different cells. Transient co-transfection of 293T packaging cells with DNA plasmids encoding lentiviral vector constituents resulted in production of high-titer DLV (0.5-1.2 × 107IU/mL), which can be further concentrated over 100-fold through a single step ultracentrifugation. These vectors were capable of transducing a variety of cells from both primate and non-primate sources and high transduction efficiency was achieved using concentrated vectors. Assessment of potential generation of RCV revealed no detection of infection by infectious particles in DLV-transduced CEM, SupT-1 and MT-2 cells. Long-term culture of transduced cells showed a stable expression of transgenes without apparent alteration in cellular morphology and growth kinetics. Vector mobilization to untransduced cells mediated by wild-type HIV-1 infection was confirmed in this test. Challenge of transduced human T-lymphocytes with wild-type HIV-1 showed these cells are totally resistant to the viral infection. Considering the effective gene transfer and stable gene expression, safety and anti-HIV activity, these DLV vectors warrant further exploration for their potential use as a gene transfer vehicle in the development of gene therapy protocols.

关键词：基因转化艾滋病病毒-1 抑制作用辅助受体艾滋病

Physical simulation of urban rainfall infiltration

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Journal of China University of Mining and Technology 2008年第2期18卷 293-295,304页

作者： LI Jie zeng bing WANG Yan-xia SHEN Lei School of Resource and Earth Sciences China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China

To meet the demand of urban rainwater integrated management,we designed and complemented a physical simulation experimental system of urban rainfall infiltration regulation *** discuss the feasibility of quantitative regulations of urban underlying surface rainfall infiltration conditions and a practical application of a simulated experimental *** a com- prehensive analysis of the composition of an effective rainwater harvesting system and selection of water storage material,we simulated the major parameters of an experimental area rainfall,soil moisture and water storage capacity by providing an effective regulation of the experimental area runoff coefficient,obtained from basic data.

关键词： urban rainwater integrated management infiltration condition underlying surface physical simulation