摘挂列车调车作业计划编制方法

本文从摘挂列车编制的要求出发,分析了利用"车组编号及合并使用线路法"进行摘挂列车调车作业计划编制的方法及步骤,并进一步拓宽了该方法在调车作业计划编制中的应用。     

Transnational Economists in the Eurozone Crisis: Professional Structures,Networks and Ideas

ABSTRACT

In recent years IPE and EU studies scholars have examined how actors in international organisations and EU institutions shape policy ideas. This article explores the professional structure of economists affiliated to two Brussels-based think tanks, Bruegel and CEPS, who, in the context of the Eurozone crisis, sought to contribute to the production of policy solutions to douse the flames of the crisis and put forward long term recommendations for the EMU’s stability. Through the analysis of more than 300 CVs and by drawing on network and sequence analysis, the article shows that in their search for solutions, Brussels-based think tanks bring together economists from different EU member states, whose authority draws on academic qualifications, experience, and seniority. They are ‘multiple insiders’ connected to a wide range of institutions and professional networks, who move back and forth between professional and organisational networks and serve as bridges between revisionist, orthodox, and mixed economic ideas.     

基于混沌遗传算法的虚拟维修拆卸序列规划研究

将经典遗传算法和混沌算法相融合,提出一种混沌遗传算法,该算法可以用于解决虚拟维修拆卸序列优化问题。     

Assembly information modelling and sequences generation algorithm of autobody

This paper attempts to formalise the assembly information of autobody and solve all feasible assembly sequences. In this paper, an assembly information model is built by using polychromatic sets and the mathematic forms of these models are given. The model is described by locating relation equations which express the constrained relationship of locating and displacement interference equations which express the constrained relationship of possible displacement. At first, the assembly information model is used to model the assembly information of autobody; then according to locating relation equations and displacement interference equations, all feasible assembly sequences can be derived. Finally, a case study illustrates the application of the proposed assembly information model. The proposed assembly information model and sequences generation approach is successfully demonstrated by autobody assembly planning, and could facilitate assembly sequence optimisation under a robust and reliable situation.     

基于改进M序列的数字噪声源设计及其FPGA实现

常规模拟方法产生的噪声功率谱不平坦且很难控制。为产生高随机、高速度数字噪声,利用多位M序列的长周期伪随机性,截取高位M序列的部分位求和来产生新的M序列,证明其具有高位M序列的性质,并将其用于数字噪声源的设计应用。运用qurtusⅡ软件进行硬件编程仿真,并用matlab对仿真结果进行功率谱分析,证明新方法产生的随机噪声具有高随机、高速度的良好性能,且方法简单实用,具有一定应用价值。     

一种计算de Bruijn序列可解长度的方法

基于de Bruijn序列反馈函数真值表的特性和反演公式的原理,提出了一种用于计算M序列可解长度的算法,通过该算法能确定生成M序列的最短非线性移位寄存器,有效地解决了非线性序列的综合问题。     

差序格局视阈下的农村精神养老问题探析

老有所养、老有所乐是国人不懈追求的理想。“乐”是养老的重要一面,老年人作为社会人,同样有相应的精神和情感需要。以孔子和蒂特马斯的思想为基础,阐述精神养老的重要性;从费孝通的差序格局出发,论述农村的差序格局是精神养老的载体;分析差序格局中血缘、地缘、业缘因素在农村精神养老中发挥的重要作用。     

重庆市外事培训中心

重庆市外事培训中心是2007年7月经重庆市机构编制委员会批准同意重庆与世界杂志社新增机构,是重庆对外交流合作的重要桥梁和纽带。中心承担重庆市人民政府外事侨务办公室交办的外事培训任务以及相关的社会服务。     

一种高安全性的级联型混沌扩频序列

针对传统一维混沌映射产生序列复杂度低、保密性不理想等问题,提出了一种基于Logistic改进型映射和Cubic映射的级联型混沌序列。新序列的混沌映射表达式由原来的低次一阶差分方程扩展为高次二阶差分方程,映射迭代过程由单级迭代变为二级交叉迭代,从而提高了混沌系统的复杂性。对新序列的非线性动力学混沌特性和扩频通信性能进行了仿真对比,结果表明新序列具有混沌吸引子结构更加复杂、初值敏感性更强、序列复杂度更高、安全性更好的特点,最后验证了新混沌序列具有和传统一维混沌序列相当的扩频特性。     

混沌扩频测控系统码跟踪性能分析

混沌信号的非周期性有助于解决距离测量中的模糊问题,使得它在测控系统中具有巨大应用吸引力。混沌扩频测控系统的码跟踪抖动,除了来源于加性噪声影响之外,还受到数字化混沌序列相关函数旁瓣随机性的影响。根据码跟踪原理与混沌码特性,给出了混沌码相关函数旁瓣随机性影响下码跟踪环路鉴相增益随机性的计算方法,分析了混沌扩频测控系统的码跟踪性能。结果表明,混沌码相关函数随机性的存在,使码鉴相增益产生随机性,它与环路稳态误差的相互作用对跟踪精度产生有限影响。分析结果可以为混沌序列在扩频测控系统中的应用提供支持与参考。