检索结果-南通市图书馆

Combination of drainage, water supply and environmental protection as well as rational distribution of water resource in Zhengzhou mining district

引用

Science china Earth Sciences 2005年第10期48卷 1768-1779页

作者： WU Qiang1, LI Duo1,2. DI Zhiqiang3, MIAO Ying3, ZHAO Suqi4 & GUO Qiwen5 1. Resource Exploitation engineering college, CUMT, Beijing 100083,{2. 2. shijiazhuang engineering college, university of economics, shijiazhuang 050031,{2. 3. Shenyang Institute of Geology and Mineral Resources, Shenyang 110032.{2. 4. State Adminstration of Coal Mine Safety, Beijing 100013,{2. 5. Zhengzhou Coal Mine Company (Group), Zhengzhou 452.71,{2. Resource Exploitation engineering college CUMT university of economics Shenyang Institute of Geology and Mineral Resources State Adminstration of Coal Mine Safety Zhengzhou Coal Mine Company (Group)

The geological condition of coalfield is much complex in china. With increasing in mining depth and drainage amount, the contradiction of drainage, water supply and environ-mental protection is becoming more and more serious. However, the contradiction can be solved by the scientific management of optimizing combination of drainage, water supply and environ-mental protection. The Philip multiple objectives simplex method used in this article has searched for a possible solution at the first step, and then it goes on searching to find out whether there is a weight number that can lead the solution to the biggest. It can reduce the randomness and diffi-culty of traditional weight method which determine the weight number artificially. Some beneficial coefficients are vague and the number is larger in the model of water resource dispatch. So the vague layer analysis method can consider these vague factors fully, combining the qualitative and quantitative analysis together. Especially, this method can quantify the experiential judge-ment of policy decider, and it will turn to be more suitable if the structure of objective factors is complex or the necessary data are absent. In the paper, the two methods above are used to solve the plans of drainage, water supply and optimizing distribution of water resource in the Zhengzhou mining district.

关键词： combination of drainage, water supply and environmental protection, Philip multiple objective simplex method, vague layer analysis method, distribution of water resource.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Zhang-Xuan thermal uplift and its genesis

引用

Progress in Natural Science:Materials International 2005年第8期15卷 725-732页

作者： SHAO Ji'an1*, NIU Shuyin2. ZHANG Lüqiao3 and LI Hongyang2.1. School of Earth and Space Sciences, Peking university, Beijing 100871, china 2. {2. university of economics, shijiazhuang 050031, china 3. Geological Bureau of Inner Mongolia, Huhhot 01002., china) School of Earth and Space Sciences Peking University Beijing 100871 China. shijiazhuang university of economics Shijiazhuang 050031 China. Geological Bureau of Inner Mongolia Huhhot 010020 China

Based on the researches of the Mesozoic thermal evolution history, the deformed structures, and fission track analysis of the Zhangjiakou-Xuanhua area, we obtained the following knowledge: the area experienced in 140 Ma an underplating which is marked by emplacement of mantle derived magma; during 130—110 Ma a series of eruptions and intrusions happened, and during 80—10 Ma a rising process occurred which is synchronous with the adjacent Taihang and Yanshan Mountains and was accompanied by a series of structures down slipping from the just formed Zhang-Xuan uplift toward its periphery. Combining the Zhang-Xuan thermal lift with the large detachment structure in Baoding depression of the North china Basin in the Late Mesozoic confirms that an even larger extensional tectonic background existed in North china during this period.

关键词： Zhang-Xuan area underplating thermal uplift fission track extensional structure.

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

About the convergence rates of a class of gene expression programming

引用

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 050031,{2. State Key Laboratory of Software engineering Wuhan University Department of Information engineering Shijiazhuang University of Economics

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

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

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

引用

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 School of Mechanical engineering Shijiazhuang Railway Institute Department of engineering Mechanics Shijiazhuang Railway Institute

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

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Quantum secret sharing between multiparty and multiparty with four states

引用

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 college of Physics and Information engineering Hebei Normal University Shijiazhuang China college of Mathematics and Information Science Hebei Normal University Shijiazhuang 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

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

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

引用

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 China college of Physics and Information engineering Hebei Normal University Shijiazhuang China Hebei Advanced Thin Films Laboratory Shijiazhuang 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

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Probabilistic teleportation via a non-maximally entangled GHZ state

引用

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

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A remark on Ishikawa iteration

引用

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.

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

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

引用

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 School of Civil engineering Hebei University of Science and Technology Shijiazhuang 050018 China 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

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

SH-guided waves in layered piezoelectric/piezomagnetic plates

引用

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 college of Mechanical engineering Yanshan University Qinhuangdao 066004 China 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

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：