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Two-stop-two-slip motions of a dry friction oscillator

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Science china(Technological Sciences) 2010年第3期53卷 623-632页

作者： YANG ShaoPu1 & GUO ShuQi2.1 School of Mechanical engineering,shijiazhuang Railway Institute,shijiazhuang 050043,china 2.Department of engineering Mechanics,shijiazhuang Railway Institute,shijiazhuang 050043,china 1. School of Mechanical engineering Shijiazhuang Railway Institute Shijiazhuang 050043 China2. Department of Engineering Mechanics Shijiazhuang Railway Institute Shijiazhuang 050043 China

This paper presents the investigation on the two-stop-two-slip (TSTS) motions in a dry friction *** is a kind of dissipated *** dry friction oscillator implies complicated stick-slip *** to its nonlinear non-smooth characters,it is difficult to analyze the stick-slip ***,TSTS motion is analyzed in this paper.A closed form solution of the TSTS motions is *** addition,parameter domain for the motion is *** general,there are no explicit solutions to transcendental equation in the closed form ***,explicit solutions are possible for special ***, Poincare map is structured to analyze the stability of the motions.

关键词： dry friction non-smooth dynamics stick-slip motion

Quantum secret sharing between multiparty and multiparty with four states

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Science china(Physics,Mechanics & Astronomy) 2007年第5期50卷 572-580页

作者： YAN FengLi1, GAO Ting2.& LI YouCheng1 1 college of Physics and Information engineering, Hebei Normal {2., shijiazhuang 050016, china 2.college of Mathematics and Information Science, Hebei Normal {2., shijiazhuang 050016, china 1. college of Physics and Information engineering Hebei Normal University Shijiazhuang 050016 China 2. college of Mathematics and Information Science Hebei Normal University Shijiazhuang 050016 China

A protocol of quantum secret sharing between multiparty and multiparty with four states was presented. It was shown that this protocol can nullify the Trojan horse attack with a multi-photon signal, the fake-signal attack with Einstein-Podolsky- Rosen pairs, the attack with single photons, and the attack with invisible photons. In addition, the upper bounds of the average success probabilities were given for dishonest agent eavesdropping encryption using the fake-signal attack with any two-particle entangled states.

关键词： quantum secret sharing, security, Einstein-Podolsky-Rosen pairs

Quantum secret sharing between m-party and n-party with six states

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Science china(Physics,Mechanics & Astronomy) 2009年第8期52卷 1191-1202页

作者： GAO Ting1,YAN FengLi2.3 & LI YouCheng2.3 1 college of Mathematics and Information Science,Hebei Normal university,{2. 050016,china 2.college of Physics and Information engineering,Hebei Normal university,{2. 050016,china 3 Hebei Advanced Thin Films Laboratory,{2. 050016,china college of Mathematics and Information Science Hebei Normal University Shijiazhuang 050016 China college of Physics and Information engineering Hebei Normal University Shijiazhuang 050016 China Hebei Advanced Thin Films Laboratory Shijiazhuang 050016 China

A quantum secret sharing scheme between an m-party group and an n-party group is proposed using three conjugate bases.A sequence of single photons,each of which is prepared in one of the six states,is used directly to encode classical information in the quantum secret sharing *** this scheme,each of all m members in group 1 chooses randomly his/her own secret key individually and independently,and directly encodes his/her respective secret information on the states of single photons via unitary operations,then the last one sends 1/n of the resulting qubits to each member of group *** measuring their respective qubits,all members in group 2.share the secret information shared by all members in group *** renders impossible a Trojan horse attack with a multi-photon signal,a fake-signal attack with EPR pairs,an attack with single photons,and an attack with invisible *** give the upper bounds on the average success probabilities for dishonest agent eavesdropping encryption using the fake-signal attack with any two-particle entangled states.

关键词： quantum secret sharing security EPR pairs

About the convergence rates of a class of gene expression programming

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Science china(Information Sciences) 2010年第4期53卷 715-728页

作者： DU Xin1,2. & DING LiXin1 1State Key Laboratory of Software engineering, Wuhan university, Wuhan 430072. {2. 2.epartment of Information engineering, shijiazhuang university of economics, shijiazhuang 05003.. china 1. State Key Laboratory of Software engineering Wuhan University Wuhan 430072 China2. Department of Information Engineering Shijiazhuang University of Economics Shijiazhuang 050031 China

This paper studies the convergence rates of gene expression programming based on maintaining elitist (ME-GEP) by means of Markov chain and spectrum analysis. We obtain the following results: (1) ME-GEP algorithm converges to the global optimum in probability. (2. The convergence rates of ME-GEP algorithm depend on the revised spectral radius of transition matrix of Markov chain corresponding to the algorithm. (3) The upper bounds of revised spectral radius are estimated, which are determined by the parameters of ME-GEP algorithm. (4) As an application of the theoretical results acquired in the paper, the convergence rates of ME-GEP for the polynomial function modeling problem are also analyzed, which verifies the relations between the convergence rates and the algorithm parameters.

关键词： GEP ME-GEP convergence rates Markov chain revised spectral radius

Probabilistic teleportation via a non-maximally entangled GHZ state

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Chinese Science Bulletin 2010年第10期55卷 902-906页

作者： YAN FengLi1,2.& YAN Tao1,2.1 college of Physics Science and Information engineering,Hebei Normal {2.,shijiazhuang 050016,china 2.Hebei Advanced Thin Films Laboratory,shijiazhuang 050016,china college of Physics Science and Information engineering Hebei Normal University Shijiazhuang China Hebei Advanced Thin Films Laboratory Shijiazhuang China

We present a scheme for probabilistic teleportation via a non-maximally entangled GHZ *** teleportation will succeed with a calculable *** teleportation process requires the sender to make a generalized Bell state measurement,the cooperator to perform a generalized X basis measurement,and the receiver to perform a collective unitary transformation and to make a measurement on an auxiliary *** success probability of the teleportation is *** also obtain the maximum of the success probability of the teleportation.

关键词：成功概率 GHZ态隐形传送纠缠 Bell态测量量子隐形传态传输过程辅助粒子

Rock matrix-fractured media model for heterogeneous and fractured coal bed

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中国有色金属学会会刊：英文版 2011年第S3期21卷 621-625页

作者： ZHANG Chun-hui1, YU Guang-ming2. ZHANG Chun1 1. School of Civil engineering, Hebei university of Science and Technology, {2. 050018, china 2. School of Civil engineering, Qingdao Technological university, Qingdao 2.6033, china [a] School of Civil engineering Hebei University of Science and Technology Shijiazhuang 050018 China [b] School of Civil engineering Qingdao Technological University Qingdao 266033 China

Coal was considered rock matrix-fractured media composed of rock matrix and fractures, and the rock matrix-fractured media model for heterogeneous and fractured coal bed was presented. In this model the rock matrix is heterogeneous, and the mechanical parameters such as elastic modulus and strength follow Weibull distribution. Fractures in coal bed were generated with the discrete fracture network method, and the properties of fractures were simulated with Desai element. Then the virtual generating system (VGS) of natural heterogeneous and fractured coal bed was developed in Matlab 6.0. The coupled model of gas flow and deformation process based on the rock matrix-fractured media model method and VGS for heterogeneous and fractured coal bed was presented, and the numerical code was developed in Matlab 6.0. The gas flow process in the heterogeneous and fractured coal bed was simulated in a numerical case. The main conclusions are: 1) The natural heterogeneous and fractured coal bed could be simulated by the rock matrix-fractured media model and VGS; 2. The fractures connected with the well have much more effects on gas flow than those non-connected.

关键词： heterogeneity fractures rock matrix-fractured media

A remark on Ishikawa iteration

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Chinese Science Bulletin 1997年第8期42卷 631-633页

作者： ZHOU HaiyunDepartment of Basic Course, Ordnance engineering college, {2. 050003, china Department of Basic Course Ordnance Engineering College Shijiazhuang China

LET E be a real Banach space with norm ||·||,E~* a uniformly convex dual *** K bea nonempty closed convex and bounded subset of E,T:K→K a continuous strongly pseudo-contractive ***,Chidume proved that the Mann itera... 详细信息

关键词： Ishikawa iteration strong pseudocontractlon Reich’s inequality.

SH-guided waves in layered piezoelectric/piezomagnetic plates

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Progress in Natural Science:Materials International 2009年第7期19卷 811-816页

作者： Guoquan Nie a,b, Zijun An a, Jinxi Liu b a college of Mechanical engineering, Yanshan {2., Qinhuangdao 066004, china b Department of engineering Mechanics, shijiazhuang Railway Institute, shijiazhuang 050043, china [a]college of Mechanical engineering Yanshan University Qinhuangdao 066004 China [b]Department of Engineering Mechanics Shijiazhuang Railway Institute Shijiazhuang 050043 China

The propagation of shear horizontal (SH) guided waves in a coupled plate consisting of a piezoelectric layer and a piezomagnetic layer is studied. Both the layers are transversely isotropic and perfectly bonded along the interface. The upper and the lower surfaces of the plate are assumed to be mechanically free, electrically open and magnetically closed. Two different cases are considered. One is that the bulk shear wave velocity of piezoelectric material is larger than that of piezomagnetic material. The other is that the bulk shear wave velocity of piezomagnetic material is larger than that of piezoelectric material. The dispersion relation is obtained while the phase velocity is among the bulk shear wave velocity of two different layers. The numerical results show that the phase velocity approaches the smaller bulk shear wave velocity of the material in the system with the increase in the wave number for different modes. The thickness ratio and the properties of the piezoelectric material have great effect on the dispersion behaviors. The results of this paper can offer some fundamental theory to the application of piezoelectric/piezomagnetic composites or structures.

关键词： Piezoelectric material Piezomagnetic material SH-guided wave Dispersion relation

ARCHITECTURE OF MANUFACTURING EXECUTION SYSTEM IN THE EXTENDED ENTERPRISE

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Chinese Journal of Mechanical engineering 2002年第1期15卷 90-93页

作者： Song Haisheng college of Electronic and Mechanical engineering， Hebei {2. of Science and Technology，shijiazhuang 050054，china Wang Jiahai Zhang Shu Tongji {2. college of Electronic and Mechanical engineering Hebei University of Science and Technology Shijiazhuang 050054 China

The extended enterprise is formed according to the philosophy of dispersednetworked manufacturing. Manufacturing execution system (MES) can close the information gap whichexists between device control system and production information management system. The functions andthe web-based architecture of the MES in the extended enterprise are introduced. Using thecooperating system models of object-oriented and distributed agents and CORBA, all objects keep touniform interface standards and are easily inserted to object request broker. The utilization ofdistributed MES in extended enterprise can adapt fast change of manufacturing environment andresource. It also can improve the independent management capability of manufacturing cell and theenterprise response capability to global economic competition.

关键词： Extended enterprise Manufacturing execution system Dispersed networkedmanufacturing Agent