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Evolution of quantum states via Weyl expansion in dissipative channel

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Chinese Physics B 2019年第8期28卷 160-166页

作者： Li-Yun Hu Zhi-ming rao Qing-Qiang Kuang Center for Quantum Science and Technology Jiangxi Normal UniversityNanchang 330022China Key Laboratory of Optoelectronic and Telecommunication Jiangxi Normal UniversityNanchang 330022China

Based on the Weyl expansion representation of Wigner operator and its invariant property under similar transformation,we derived the relationship between input state and output state after a unitary transformation including Wigner function and density *** is shown that they can be related by a transformation matrix corresponding to the unitary *** addition,for any density operator going through a dissipative channel,the evolution formula of the Wigner function is also *** applications,we considered further the two-mode squeezed vacuum as inputs,and obtained the resulted Wigner function and density operator within normal ordering *** method is clear and concise,and can be easily extended to deal with other problems involved in quantum metrology,steering,and quantum information with continuous variable.

关键词： Weyl expansion Wigner operator similar transformation two-mode squeezed state integration within ordered product(IWOP)technique

Proposal of Realization Restricted Quantum Game with Linear Optic Method

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Communications in Theoretical Physics 2006年第1期45卷 75-78页

作者： ZHAO Hai-jun PANG Xi-ming Department of Physics Hunan Normal University Changsha 410081 China

We present a quantum game with the restricted strategic space and its realization with linear optical system, which can be played by two players who are separated remotely. This game can also be realized on any other quantum computers. We find that the constraint brings some interesting properties that are useful for making game models.

关键词： quantum game restriction equilibrium linear optic

Selective 3-and 6-OH modification of (-)-clausenamide

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Chinese Chemical Letters 2011年第7期22卷 761-764页

作者： Jian jun Xue Xiao ming Yu Institute of Materia Medica Chinese Academy of Medical Sciences & Peking Union Medical College Beijing 100050 China

（-）-Clausenamide is a drug candidate under Phase I clinical trial for treatment of Alzheimer＇s disease （AD）. In order to elucidate the substituent related structure-activity relationship, six one-substituent modified （-）-clausenamide analogues were designed, and four of them, namely 3-O-methyl, 6-O-methyl, 3-des-hydroxyl and 6-des-hydroxyl analogues were prepared by selective 3- and 6- OH modification of （-）-clausenamide.

关键词： (-)-Clausenamide Derivatives Synthesis Alzheimer's disease

New Soliton-like Solutions and Multi-soliton Structures for Broer-Kaup System with Variable Coefficients

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Communications in Theoretical Physics 2005年第5X期44卷 802-806页

作者： JI ming-jun Lü Zhuo-Sheng Transportation Management College Dalian Maritime University Dalian 116026 China Key Laboratory of Mathematics Mechanization Academy of Mathematics and Systems Science the Chinese Academy of Sciences Beijing 100080 China

By using the further extended tanh method [Phys. Lett. A 307 （2003） 269; Chaos, Solitons ＆ Fractals 17 （2003） 669] to the Broer-Kaup system with variable coefficients, abundant new soliton-like solutions and multl-solitonlike solutions are derived. Based on the derived multi-soliton-like solutions which contain arbitrary functions, some interesting multi-soliton structures are revealed.

关键词： further extended tanh method soliton-like solution

Microstructure and tribological behavior of tungsten inert gas welding arc brazing tin-based babbit

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Rare Metals 2020年第2期39卷 193-199页

作者： Fang-ming Zhou Qing-Ya Zhang ming-Xiao Shi Hui Li jun-Wu Guo Jiangsu Province Key Laboratory of Advanced Welding Technology Jiangsu University of Science and TechnologyZhenjiang212003China

The microstructure of the tin-based babbit obtained by the method of tungsten inert gas welding(TIG)arc brazing was studied by optical microscopy(OM)and X-ray diffraction(XRD).Tribological behavior was investigated by high-temperature friction and wear testing machine(HTFWT),laser scanning confocal microscopy(LSCM),scanning electron microscopy(SEM)and energydispersive spectrometer(EDS).It can be found that the higher welding current of the melting tin-based babbit makes it possible to form isomer structure with fine crystals of the cubic SnSb compounds and large star Cu6Sn5 compounds so that a higher hardness can be achieved,and a lower wear rate can be obtained over the entire distance of sliding *** the applied load is 2 N,the contact surface is oxidized due to the accumulation of friction heat and oxide,which plays a role of lubricated ***,the softer Sn-based solid solution forms obvious furrow under abrasive wear,and the harder SbSn and Cu6Sn5 intermetallic compounds shatter and leave a hole under friction.

关键词： Tin-based babbit TIG arc brazing Microstructure Tribological behavior

Two new acetylated ginsenosides from the roots of Panax quinquefolium

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Chinese Chemical Letters 2008年第9期19卷 1099-1102页

作者： Ji ming Jia Li jun Wu School of Traditional Chinese Materia Medica Shenyang Pharmaceutical University Shenyang 110016 China Hebei Province Traditional Chinese Medicine and Western Medicine Institute of Pharmaceutical Shijiazhuang 050035 China

Two new acetylated ginsenosides, 20（S）-protopanaxatriol-6-O-α-L-rhamnopyranosyl （1 → 2）-β-D-6＇-O-acetylglucopyranoside （1） and 20（R）-protopanaxatrol-6-O-α-L-rhamnopyranosyl （1 → 2）-β-o-6＇-O-acetylglucopyranoside （2）, were isolated from the roots of Panax quinquefolium. The structures were elucidated on the basis of spectroscopic techniques and chemical means.

关键词： Panax quinquefolium Araliaceae Acetylated ginsenoside

Cooperative Effects of Noise and Coupling on Stochastic Dynamics of a Membrane-Bulk Coupling Model

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Communications in Theoretical Physics 2009年第3期51卷 455-459页

作者： TANG jun JIA Ya YI ming College of Science China University of Mining Technology Xuzhou 221008 China Department of Physics and Institute of Biophysics Huazhong Normal University Wuhan 430079 China

Based on a membrane-bulk coupling cell model proposed by Gomez-Marin et al. [ Phys. Rev. Lett. 98 （2007） 168303], the cooperative effects of noise and coupling on the stochastic dynamical behavior are investigated. For parameters in a certain region, the oscillation can be induced by the cooperative effect of noise and coupling. Whether considering the coupling or not, corresponding coherence resonance phenomena are observed. Furthermore, the effects of two coupling parameters, cell size L and coupling intensity k, on the noise-induced oscillation of membranes are studied. Contrary effects of noise are found in and out of the deterministic oscillatory regions.

关键词： membrane-bulk cell model coupling noise coherence resonance

Transitivity of varietal hypercube networks

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Frontiers of Mathematics in China 2014年第6期9卷 1401-1410页

作者： Li XIAO Jin CAO jun-ming XU School of Mathematical Sciences University of Science and Technology of ChinaWentsun Wu Key Laboratory of CAS Hefei 230026 China

The varietal hypercube VQn is a variant of the hypercube Qn and has better properties than Qn with the same number of edges and vertices. This paper proves that VQn is vertex-transitive. This property shows that when VQn is used to model an interconnection network, it is high symmetrical and obviously superior to other variants of the hypercube such as the crossed cube.

关键词： Combinatorics graph transitivity varietal hypercube network

Fast Computation of Electrostatic Interactions for a Charged Polymer with Applied Field

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Chinese Journal of Polymer Science 2020年第6期38卷 665-672页

作者： Hao Lin Zi-Tong Lei ming-ming Ding Hong-jun Wang Tong-Fei Shi School of Mathematics Jilin Normal UniversityChangchun 130103China State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 730022China College of Computer Jilin Normal UniversitySi ping 136000China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei230026China

Using a hybrid simulation approach that combines a finite difference method with a Brownian dynamics,we investigated the motion of charged *** to the fact that polymer-solution systems often contain a large number of particles and the charged palymer chains are in a state of random motion,it is a time consuming task to calculate the electrostatic interaction of the ***,we propose a new strategy to shorten the CPU time by reducing the iteration *** simulation results ilustrate the effect of preset parameters on CPU time and accuracy,and demonstrate the feasibility of the"local iteration"***,we find that the increase in the number of charged beads has no signifiant infuence on the time of global iterations and local *** a number of 80×80×80 grids,when the relative error is controlled below 1.5%,the computational efficiency is increased by 8.7 times in the case that contains 500 charged *** adition,for a number of 100×100×100 grids with 100 charged beads,the computational efciency can be increased up to 12 *** work provides new insights for the optimization of iterative algorithms in special problems.

关键词： Finite dfference method Brownian dynamics Charged polymers Electrostatic interaction Local iteration