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A Symbolic-Numerical Approach for theSynthesis of Planar Function Generators

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Journal of Modern Transportation 1994年第1期11卷 7-14页

作者： Chen Yong Fu Jinyuan(Department of Mechanical Engineering I,southwest jiaotong university,chengdu 610031,china)

Based on the geometrical relation between the relative pole and the rotationangles of links in the four-bar linkage, a third order algebraic equation withsingle variable for the closed form solution of planar function generators hasbeen derived by using computer symbolic manipulating technique. The newlydeveloped solution method eliminates the requirement of solving system ofnoulinear equations. All solutions of the problem can be obtained directly andeasily without the need of initial values. A numerical example is givendemonstratiap the efficiency and the advantages of this method.

关键词： function senerators planar linkages synibolic-numerical approach

Constructing Intranet for the Security of E-government

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Constructing Intranet for the Security of E-government

TIME-DOMAIN RADIATION CHARACTERISTICS OF V-DIPOLE ARRAYS

The Second Conference on Fuzzy Information & Engineering

作者： JIAJUN LAI Department of Applied Mathematics, southwest jiaotong university, chengdu 610031, china YANG XU Department of Applied Mathematics, southwest jiaotong university, chengdu 610031, china

Nowadays, the security of E-govemment has been the principal problem in many countries. Furthermore the security of Intranet has become more and more important. In this a new scheme is brought forward, that is,a new strong way of authentication combined with the service of authorization has been put forward into the PKI (Public Key Infrastructures) system. It overcomes the shortcomings of single PKI system completely and ensures the security of Intranet well.

关键词： time token intranet PMI

来源： cnki会议评论

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cnki会议

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Journal of Electronics(china) 1993年第4期10卷 289-297页

作者：王均宏 Institute of EM Theory and Microwave Tech.southwest jiaotong university Chengdu 610031

The time-domain radiation characteristics of a three V-dipole array have been stud-ied by direct time-domain *** valuable results are obtained.

关键词： V-dipole Array Radiation characteristic Time-stepping approach

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车辆横向半主动悬挂的神经网络自适应控制

铁道学报 2002年第4期24卷 34-37页

作者：王月明曾京西南交通大学机械工程学院四川成都610031 西南交通大学牵引动力国家重点实验室四川成都610031

分析了车辆半主动悬挂模型的非线性特性 ,提出了采用神经网络的半主动悬挂自适应控制模型 ,设计了神经网络辨识器和控制器 ,采用专门算法修正控制器网络权值。仿真计算表明。

关键词：横向半主动悬挂神经网络自适应控制列车

f-Algebra in Quotient Space

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Journal of southwest jiaotong university(English Edition) 2009年第3期17卷 271-274页

作者：冯颖 School of Mathematics Southwest Jiaotong University School of Information Science and Technology Southwest Jiaotong University

Based on the knowledge off-algebra, the concept of quotient f-algebra is mainly discussed. The sufficient condition when the quotient space is quotient f-algebra is given, and the quotient f-algebra that makes the kernel of a Riesz homomorphism as the equivalence class is obtained. Moreover, some important algebraic properties, such as commutative, semiprime and unital are studied, and the relationship between an f-algebra and its quotient space with respect to these properties are discussed in details.

关键词： f-Algebra Quotient f-algebra Commutative Semiprime Unit element

D(β)-vertex-distinguishing total coloring of graphs

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Science china Mathematics 2006年第10期49卷 1430-1440页

作者： ZHANG Zhongfu,LI Jingwen,CHEN Xiang’en,YAO Bing, WANG Wenjie & QIU Pengxiang Institute of Applied Mathematic, Lanzhou jiaotong university, Lanzhou 730070, china college of Mathematics and Information Science, Northwest Normal university, Lanzhou 730070, china college of Information and Electrical Engineering, Lanzhou jiaotong university, Lanzhou 730070, china Institute of Applied Mathematic Lanzhou Jiaotong University Lanzhou 730070 China college of Mathematics Information Science Northwest Normal University Lanzhou 730070 China college of Information Electrical Engineering Lanzhou Jiaotong University Lanzhou 730070 China

A new concept of the D(β)-vertex-distinguishing total coloring of graphs, i.e., the proper total coloring such that any two vertices whose distance is not larger than β have different color sets, where the color set of a vertex is the set composed of all colors of the vertex and the edges incident to it, is proposed in this paper. The D(2)-vertex-distinguishing total colorings of some special graphs are discussed, meanwhile, a conjecture and an open problem are presented.

关键词： graph, total coloring, D(β)-vertex-distinguishing total coloring, D(β)-vertexdistinguishing total chromatic number.

THE FRACTURE CHARACTERISTICS OF δ-Al_2O_3/AlALLOY COMPOSITES

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Acta Metallurgica Sinica(English Letters) 1999年第6期12卷 0-0,0-0+0-0+0页

作者： G.Z. Kang Q. Gao C. Yang and J.X. Zhang (Department of Applied Mechanics and Engineering, southwest jiaotong university, chengdu 610031, china )

The initial location of the crack and the controlling factor of the fracture in the squeeze casting composites δ-Al2 O3/Al-5.5Zn, δ-Al2 O3/Al-5.5Mg and δ-Al2 O3/Al-cSi were studied by microscopic observation and finite element analysis(FEA). The in situ failure processes were obseroed bU the scanning electronic microscope mp. The distributions of stress components along the fiber length in matta, and the tnean axial stresses of fiber and matrix were calculated by three-dimensional elasto-plastic *** is found that the failure modes of short fiber reiwtreed metal matrix composites change with the variations of the micro-structurnl characteristics of composites, such as fiber orientation, matrix strength and intedecial bonding, etc.

关键词： metal matrix composite short fiber fracture characteristics finite element analysis

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视频传输差错时域掩盖方法研究

铁道学报 2004年第4期26卷 55-59页

作者：彭强诸昌钤西南交通大学计算机与通信工程学院四川成都610031

为了克服数字视频在铁路现场传输易出现信息丢失的问题,对视频差错掩盖技术进行了研究,提出一种对付视频传输差错的时域掩盖方法。将参考帧宏块(Macroblock)的运动向量依照其运动趋势外推,评估图像受损区域与这些外推预测宏块之间的相关... 详细信息

为了克服数字视频在铁路现场传输易出现信息丢失的问题,对视频差错掩盖技术进行了研究,提出一种对付视频传输差错的时域掩盖方法。将参考帧宏块(Macroblock)的运动向量依照其运动趋势外推,评估图像受损区域与这些外推预测宏块之间的相关性,估算出受损块的运动向量,实现受损图像区域的掩盖。为克服物体边界不正确替代的缺点,将所提出的算法与改进的边界匹配(BoundaryMatching)算法相结合实现了较为平滑的掩盖。基于H.263+的仿真实验表明,在间隔丢失GOB(GroupofBlock)或整帧图像完全丢失情况下,可以取得较为满意的效果。

关键词：视频监控视频传输差错掩盖差错恢复 H.263+

Reduced analysis and confirmatory research on co-adaptability theoretical solution to conflicting events in construction engineering projects

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Science china(Technological Sciences) 2010年第2期53卷 480-485页

作者： HOU XueLiang1 , LU Mei2 & WANG Kai3 1 School of Business Administration, North china Electric Power university, Beijing 102206, china 2 Department of Construction Management, Tsinghua university, Beijing 100084, china 3 college of Management, Beijing jiaotong university, Beijing 100084, china 1. School of Business Administration North China Electric Power University Beijing 102206 China2. Department of Construction Management Tsinghua University Beijing 100084 China3. College of Management Beijing Jiaotong University Beijing 100084 China

The co-adaptability theoretical solution to conflicting events in construction engineering projects has three problems. First, the transformation of constraint conditions of theoretical solution is very difficult in practical engineering applications; second, some coefficients are difficult to be determined; third, there are overfull circular arithmetic operations involved in it. To resolve these problems, a new method to reduce the theoretical solution complications is proposed. By analyzing the operating mechanism of theoretical solution model, redundancies in the theoretical solution can be eliminated, and the ISM mapping with the co-adaptability solution can be set up. Based on this approach, a procedure to solve practical conflicting events in construction projects is established by replacing characteristic variables with mathematic variables. The research results show that the procedure can replace the co-adaptability theoretical solution effectively and solve practical conflicting events in construction projects.

关键词： construction project conflict theoretical solution reduced analysis ISM confirmatory research