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Development　of　GPS　Positioning　Software　Package　at　Southwest　Jiaotong　University（SWJU）　of　China

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Journal of Modern Transportation 1994年第1期11卷 71-75页

作者： Huang Dingfa(Department of Surveying Engineering,Southwest Jiaotong University,)chengdu 610031, China

This paper provides an overview about GPS positioning software pacforge inSWJU. The mathematical methodology, which the software package bed on, isoutlined for static and kineniatic mode. It is well known that the eyele slip andanibiguity are critical componenta in view of establishins the baseline andreducing observation time. The approaches of dealing with cycle slip andanibiguity utilized in the software, are summarized.

关键词： GPS peitionirig software,double difference cycle slip satellite poitioning

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集装箱运输多箱三维装载优化问题的遗传算法

铁道学报 2004年第2期26卷 21-25页

作者：卜雷尹传忠蒲云西南交通大学交通运输学院四川成都610031 西南交通大学研究生院四川成都610031

作为一类组合优化问题,多约束条件下的三维装载问题属NP-hard问题,随着问题规模的不断增大,传统的优化算法在求解过程中会产生时间维数灾难问题。本文提出一种遗传算法,用于在铁路集装箱运输中优化具有放置方向、装载顺序、装载质量、... 详细信息

作为一类组合优化问题,多约束条件下的三维装载问题属NP-hard问题,随着问题规模的不断增大,传统的优化算法在求解过程中会产生时间维数灾难问题。本文提出一种遗传算法,用于在铁路集装箱运输中优化具有放置方向、装载顺序、装载质量、装载容积及重心等约束条件的货物三维装载问题,并结合方向及顺序约束采用巧妙的个体编码方法,结合装载质量、装载容积及重心约束构造合理的评价函数。实例计算表明该算法有效可行。

关键词：集装箱运输三维装载遗传算法优化

Research on the Transfer Benefit of Railway Investment Projects

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Journal of Modern Transportation 1995年第1期12卷 16-23页

作者： Yang Jimei Xie Wei(School of Economics and Management,Southwest Jiaotong University,chengdu 610031,China)

Though an additional railway investment will result in very complex uifluenceon the whole economic-socinl system, an assessing system comes to be set up inthis thesis. It not only shows the seope and direction of the assessment ofrailway investment projects, but indicates a new assessment theory coming intobeins. lii view of the transfer benefit of railway investinent projects being themain part of their external benefit for our national economy, we paid specialattention to calculating the transfer benefit. Finally, a series of matheniaticalmodels throush which we can accurately figure out the transfer benefit of arailway investment project are presented.

关键词： assessing system the transfer benefit

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具有主动悬挂的高速客车动力学性能研究

西南交通大学学报 1997年第2期32卷 193-197页

作者：徐涛西南交通大学牵引动力国家重点实验室

以具有二系横向主动控制悬挂装置的高速客车为例，建立了具有３１个自由度的整车数学模型。通过对系统主动悬挂简单数学模型最优控制的研究，给出了其控制规律，并用于高速客车的主动控制悬挂装置。通过对高速客车的运动稳定性、曲线通... 详细信息

以具有二系横向主动控制悬挂装置的高速客车为例，建立了具有３１个自由度的整车数学模型。通过对系统主动悬挂简单数学模型最优控制的研究，给出了其控制规律，并用于高速客车的主动控制悬挂装置。通过对高速客车的运动稳定性、曲线通过性能、随机响应的动力学仿真分析表明，加装该二系横向主动控制装置不仅能提高高速客车的蛇行临界速度，而且能较大地改善高速客车的横向运行平稳性；高速客车曲线通过性能如脱轨系数、轮轨横向力均有降低，其曲线通过性能得到了改善。因此。

关键词：高速客车主动悬挂计算机仿真动力学

The Development of Rail Transportation and the Application of High Technology

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Engineering Sciences 2004年第1期 1-6页

作者： Qian Qingquan, He Zhengyou (The Institution of Electrification & Automation, Southwest Jiaotong University, Sichuan, chengdu 610031)

Many developed countries in the world have adopted high technology to rebuild and improve the rail transportation industry actively. It has greatly increased the security and automation degree of rail transportation. Since “the ninth five year plan", the velocity and quality of rail transportation infrastructure construction have been improved quickly by applying high technology in China. However, there still exist many differences between China and the developed countries in the development of rail transportation. In this paper the author systematically introduced the application of high technology in rail transportation such as railway, metro, light railway, railway nearby su\| burb, maglev railway, etc. and also the development road to high technology industrialization in transportation field, on the basis of viewing the current development condition and the trend of rail transportation in the world and analyzing the development status and trend of rail transportation in China.

关键词： high technology rail transportation industrialization

An Integrated Approach to Flexible ModeIIing and Animated Simulation

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Journal of Modern Transportation 1994年第2期11卷 119-125页

作者： Li Shuliang Wu Zhenye(Sohool of Economics and Managmement), Southwest Jiaotong University, chengdu 610031, China Sohool of Economics and Management Southwest Jiaolong University Chengdu 610031 China

Based on the software support of SIMAN/CINEMA, this paper presents anintegrated approach to flexible modelling and simulation with animation. Themethodology provides a structured way of integrating mathematical and logicalmodel, statistical experimentation, and statistical analysis with computeranimation. Within this methodology, an animated simulation study is separatedinto six different activities: simulation objectives identification, system modeldevelopment, simulation experiment specification, animation layoutconstruction, real-time simulation and animation run, and output dataanalysis. These six activities are objectives driven, relatively independent, andintegrate through software organization and simulation files. The key ideasbehind this methodology are objectives orientation, modelling flexibility,simulation and animation integration, and application tailorability. Though themethodology is closely related to SIMAN/CINEMA, it can be extended to othersoftware environments.

关键词： flexible modelling simulation animation SIMAN CINEMA

200km/h提速客车径向转向架动力学性能研究

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铁道学报 2004年第1期26卷 22-27页

作者：李芾傅茂海卜继玲西南交通大学牵引动力研究中心四川成都610031 西南交通大学机车车辆研究所四川成都610031

径向转向架是改善机车车辆曲线通过性能的有效途径。简要介绍了国内外径向转向架发展现状 ,阐述了径向转向架的导向机理及基本结构模式。根据自导向径向转向架的基本原理 ,在现有的几种自导向转向架结构的基础上 ,提出了 2 0 0km/h提速... 详细信息

径向转向架是改善机车车辆曲线通过性能的有效途径。简要介绍了国内外径向转向架发展现状 ,阐述了径向转向架的导向机理及基本结构模式。根据自导向径向转向架的基本原理 ,在现有的几种自导向转向架结构的基础上 ,提出了 2 0 0km/h提速客车自导向径向转向架的基本方案 ,建立了动力学仿真模型 ,利用Simpack仿真软件对其进行了动力学性能分析和计算 ,并与常规转向架进行了比较。理论分析和计算结果表明。

关键词：提速动力学径向转向架

On the Orthogonal Decomposition of a Flat Symmetric Bilinear Form

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Journal of Modern Transportation 1994年第2期11卷 146-151页

作者： Li Tianrui Zeng Yonggen(Department of Applied Mathematics),Southwest Jiaotong University, chengdu 610031, China Departnent of Applied Mathematies Southwest Jiaotong University Chengdu 610031 China

In this paper, we proved a theorem on the orthogonal decomposition of a flatsymmetric bilinear form. If the nullity space of a flat symmetric bilinear formis not too large, it can be decomposed into two bilinear forms... 详细信息

关键词： flat symmetric bilinear form degenerate nullity rigidity

DIRECTIVITY OPTIMIZATION OF CURVED SURFACE DIPOLE ANTENNAS

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Journal of Electronics(China) 1994年第4期11卷 322-331页

作者：王均宏任朗 Institute of EM Theory and Microwave Tech. Southwest Jiaotong University Chengdu 610031

Based on the calculation of the characteristic parameters by moment method, the curved surface dipoles are optimized by an optimization method, the maximum directivities of some V-curved and Gauss-curved surface dipol... 详细信息

关键词： Antennas Curved surface dipoles Directivity Optimization Moment method