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Synthesis and Catalytic Activity of a Two-core Ruthenium Carbene Complex: a Unique Catalyst for Ring Closing Metathesis Reaction

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Chemical Research in Chinese Universities 2011年第5期27卷 795-798页

作者： SHAO Ming-bo wang jian-hui Department of Chemistry College of Science Tianjin University Tianjin 300072 P. R. China

The reaction of a ruthenium carbide complex RuCl2（C：）（PCy3）2 with [H（Et2O）x]＋[BF4]- at a molar ratio of 1：2 produced a two-core ruthenium carbene complex, {[RuCl（=CHPCy3）（PCy3）]2（μ-Cl）3}＋·[BF4]-, in the form of a yellow-green crystalline solid in a yield of 94%. This two-core ruthenium complex is a selective catalyst for ring closing metathesis of unsubstituted terminal dienes. More importantly, no isomerized byproduct was observed for N-substrates when the two-core ruthenium complex was used as the catalyst at an elevated temperature（137 °C）, indicating that the complex is a chemo-selective catalyst for ring closing metathesis reactions.

关键词： Ruthenium carbene complex Ruthenium catalyst Ring closing metathesis Two-core

Fair e-payment protocol based on blind signature

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The Journal of China Universities of Posts and Telecommunications 2009年第5期16卷 114-118,130页

作者： wang jian-hui LIU Jing-wei LI Xiao-hui KOU Wei-dong State Key Lab of ISN Xidian University Xi'an 710071 China Communication and Information Engineering College Xi'an University of Science and Technology Xi'an 710054 China

Electronic transaction through e-payment protocol will grow tremendous in the coming years. In this article, by conversely using blind signature, the authors propose a fair electronic payment scheme for electronic commerce, which can ensure two participants＇ right simultaneously in electronic transaction process. This scheme is different from other existing schemes and it does not require strong trust relation between customer and merchant. In the scheme, a semi-trusted third party （S-TTP） is involved to provide a fair commerce environment. The S-TTP takes part in the protocol on-line and no secure information about the business is leaked. Moreover, the participants do not need to register to S-TTP. This scheme does not require intervention of a third party in case of dispute, if one user cheats or simply crashes.

关键词： electronic business e-payment fairness S-TTP blind signature

A Unified Symmetry of Mechanical Systems with Variable Mass in Phase Space

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Communications in Theoretical Physics 2006年第3X期46卷 385-388页

作者： wang Peng FANG jian-hui ZHANG Peng-Yu, DING Ning College of Physics and Technology China University of Petroleum Dongying 257061 China

In this paper, the definition and the criterion of a unified symmetry of the mechanical system with variable mass in phase space are given. The Noether conserved quantity, the generalized Hojman conserved quantity, and Mei conserved quantity deduced from the unified symmetry are obtained. An example is given to illustrate the application of the results.

关键词： phase space variable mass system unified symmetry conserved quantity

Perturbation to Lie Symmetry and Hojman Exact and Adiabatic Invariants of Generalized Raitzin Canonical Equation of Motion

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Communications in Theoretical Physics 2007年第4X期48卷 615-618页

作者： wang Peng FANG jian-hui DING Ning ZHANG Xiao-Ni College of Physics and Technology China University of Petroleum Dongying 257061 China

In this paper, firstly, we get the Hojman exact invariants by Lie symmetry for an undisturbed generalized Raitzin equation of motion. Secondly, we study the perturbation to Lie symmetry of generalized Raitzin canonical equation of motion and get Hojman adiabatic invariants. Lastly, an example is given to illustrate the application of the results.

关键词： generalized mechanics symmetry Raitzin canonical equation perturbation adiabatic invariant

Efficiency at Maximum Power Output of a Quantum-Mechanical Brayton Cycle

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Communications in Theoretical Physics 2014年第3期61卷 344-348页

作者： YUAN Yuan HE Ji-Zhou GAO Yong wang jian-hui Department of Physics Nanchang University Nanchang 330031 China Department of Applied Physics School of Science Shanghai Second Polytechnic University Shanghai 201209 China State Key Laboratory of Surface Physics and Department of Physics Fudan University Shanghai 200433 China

The performance in finite time of a quantum-mechanical Brayton engine cycle is discussed, without intro- duction of temperature. The engine model consists of two quantum isoenergetic and two quantum isobaric processes, and works with a single particle in a harmonic trap. Directly employing the finite-time thermodynamics, the efficiency at maximum power output is determined. Extending the harmonic trap to a power-law trap, we find that the efficiency at max/mum power is independent of any parameter involved in the model, but depends on the confinement of the trapping potential.

关键词： quantum-mechanical Brayton engine harmonic trap efficiency at maximum power

A Novel RBF Neural Network Based on Data Dispersion Level and Its Application in BOF Endpoint Prediction

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A Novel RBF Neural Network Based on Data Dispersion Level an...

Modeling, Simulation and Analysis of Thermal Resistance in Multi-finger AlGaN/GaN HEMTs on SiC Substrates

第25届中国控制与决策会议

作者： Zhang Yu-xian Liu Tong wang jian-hui School of Electrical Engineering Shenyang University of Technology College of Information Science and Engineering Northeastern University

ISBN: (纸本)9781467355339

The Basic Oxygen Furnace （BOF） process is a primary method of steel-making. The endpoint targets must be strictly control. However, it is difficult to accurately predict endpoint targets in BOF. In this paper, a clustering method is proposed in which data dispersion level and new metric are introduced respectively. And the proposed clustering method is applied to obtain accurate neural network centers in order to improve accuracy of Radial Basis Function （RBF） neural network. Then a novel RBF neural network is built for the endpoint prediction in BOF process. Finally, an example of endpoint prediction is shown, the simulation results indicate that the influence of disperse and noisy data is decreased, clustering accuracy is increased and the accuracy of endpoint prediction based on RBF neural networks is improved.

关键词： Basic Oxygen Furnace Endpoint Prediction RBF Neural Networks Clustering Data Dispersion Level

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cnki会议

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Chinese Physics Letters 2012年第8期29卷 279-283页

作者： wang jian-hui wang Xin-Hua PANG Lei CHEN Xiao-Juan LIU Xin-Yu Key Laboratory of Microelectronics Device&Integrated Technology Institute of MicroelectronicsChinese Academy of SciencesBeijing 100029

The effects of varying layout geometries and various thermal boundary resistances(TBRs)on the thermal resistance of multi-finger AlGaN/GaN HEMTs are thoroughly investigated using a combination of a two-dimensional electro-thermal model coupled with the three-dimensional thermal *** measurement using micro-Raman thermography is performed to verify and enhance the accuracy of the thermal *** results indicate that thermal resistance weakly depends on the layout design because of the high thermal conductivity of ***,the analysis reveals that optimizing the TBR of the device could efficiently reduce the thermal resistance since TBR takes a significant proportion of the total thermal resistance.

关键词： AlGaN/GaN HEMTs Simulation

Sythesis, Characterization and Catalysis of [ η~5,η~1-C_5H_4-CHPh-PhO]TiCl_2

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维普期刊数据库

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Chemical Research in Chinese Universities 2001年第1期17卷 115-116页

作者： wang jian hui MU Ying PU Wei ming ZHANG Yue tao YANG Guang di LIU Ju zheng Department of Chemistry Jilin UniversityChangchun 130023P.R.China

The synthesis and structure of phenol groups containing ligand 2-[(cyclopentadienyl-phenyl)-methyl]phenol(CpH-PhCH-PhOH) were described. H Nuclear magnetic resonance (NMR) was used to show existence of ligand precursor in isomers of the group. Me3SiCp-PhCH-PhOSiMe3 was formed via treatment of 2 mol Me3SiCl with the dilithium salt of the ligand. New Ti compound [η+5, η1-C5H4-PhCH-PhO]TiCl2 was formed by reacting with titanium chloride.

关键词： Metallocene Catalyst Cyclopentadienyl group

Determination of Channel Temperature in AlGaN/GaN HEMTs by Pulsed I–V Characteristics

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Chinese Physics Letters 2012年第8期29卷 213-216页

作者： wang jian-hui wang Xin-Hua PANG Lei CHEN Xiao-Juan JIN Zhi LIU Xin-Yu Key Laboratory of Microelectronics Device&Integrated Technology Institute of MicroelectronicsChinese Academy of SciencesBeijing 100029

Electrical determination of the channel temperature used for AlGaN/GaN high-electron-mobility transistors(HEMTs)is *** measurement is based on the pulse technique that superposes a detecting pulse on the quiescent bias to acquire the electrical response under various thermal *** experiments and electro-thermal simulations manifest that the duration of the pulse used has a fairly slight influence in the measured ***,noticeable variance of thermal resistance at different gate biases is reported and the thermal resistance as a function of gate voltage decreases from 18.6 to 12.3℃·mm/W as the gate bias increases from-1 V to 2 V under low power density condition.

关键词： AlGaN/GaN HEMTs pulse