动车组运用计划和检修计划一体化编制模型及算法

针对动车运用所的动车组运用计划和检修计划编制问题,在动车组运用交路已知的前提下,以动车组的运用交路和检修规程为主要约束,以减少动车组使用数量、降低检修成本为优化目标,建立动车组运用计划和检修计划一体化编制的整数规划模型.根据动车组的可能运用情况和检修规程约束,求解动车组的可行运用路径集合;以该集合为基础,设计求解模型的模拟退火算法.通过算例分析,验证所提出的模型和算法可以有效解决动车组运用计划和检修计划的编制问题.     

动车组管理信息系统监控平台研究

随着动车组管理信息系统的广泛应用,系统运维的工作难度明显增加,如何有效地利用运维工具提升工作效率成为首要问题.在此基础上本文提出并设计研发出动车组管理信息系统监控平台,通过监控组件对信息系统软硬件运行状态的后台自动监控,实现了重点监控对象的报警提醒和综合展示,动车组管理信息系统软硬件台账及现场信息的统一管理,并有效的提升了动车组管理信息系统的运维工作效率.     

动车组检修设备管理信息系统的设计与实现

动车组检修设备是动车组运用检修的重要技术装备.建立功车组检修设备管理信息系统对于保障检修设备高效安全运用,及时快速处理故障具有重要意义,在研究铁道部、铁路局、车辆段、动车基地及动车运用所各级车辆设备管理部门和维修单位用户需求的基础上,提出系统总体架构,实现了设备技术档案管理,运行状态实时监控,多种信息化手段支持的设备检修、维护与保养,并与动车组运用检修作业紧密结合,有效支撑动车组的检修生产,保障动车组的安全、高效运营.     

Dynamic programming-based method for extraction of license plate numbers of speeding vehicles on the highway

In the last decade, vehicle identification systems have become a central element in many applications involving traffic law enforcement and security enhancement, such as locating stolen cars, automatic toll management, and access control to secure areas. As a method of vehicle identification, license plate recognition (LPR) systems play an important role and a number of such techniques have been proposed. In this paper, we describe a method for segmenting the main numeric characters on a license plate by introducing dynamic programming (DP) that optimizes the functionality describing the distribution of the intervals between characters, the alignment of the characters, and the threshold difference used to extract the character blobs. The proposed method functions very rapidly by applying the bottom-up approach of the DP algorithm and also robustly by minimizing the use of environment-dependent image features such as color and edges.     

Synthesis of experimental designs of maneuvering captive-model tests with a large number of factors

An approach to synthesizing D-optimized experimental designs for an arbitrary number of factors was developed and tested on a third-order polynomial regression model with 5–8 factors. Three options were envisaged for the internal optimization procedure: an exhaustive search, a quasirandom search with the help of the Sobol sequences, and a genetic algorithm. The calculations performed have shown the pronounced superiority of the variant involving a genetic algorithm. Captive-model tests with a catamaran model with varying Froude number, drift angle, rate of yaw, sinkage, trim, and heel are presented as an example of the practical synthesis of the experimental design. The linear regression model constructed is a third-order 5-factor polynomial with respect to all factors except the Froude number. The influence of the latter is accounted for by representing the polynomials regression coefficients as functions of the Froude number represented as a truncated Fourier series with a linear term added.     

基于多载波调制技术的同步DS/CDMA多用户检测器

提出了一种新的基于多载波调制技术的多用户检测器。分析了检测器的干扰相消原理，并给出了误码性能。该检测器具有结构简单，计算复杂度低，其性能较传统的多用户检测器性能有较大幅度的提高，在收发频差、定时为零的情况下，达到了单用户情况下检测器的性能。     

Application of multiple criteria decision making for network improvement

In this paper we propose application of multiple criteria decision making to problems of a metropolitan network improvement plan. Initially, a bilevel multiple objective network design model is considered in two objectives which are minimal government budget and minimal total travel time of road users. We seek feasible improvement alternatives among those bottleneck links in an existing road network structure and travel demand. We present an effective heuristic algorithm to obtain noninferior solutions; then ELECTRE III multiple criteria decision making and group decision making are used to evaluate and to select a compromise solution among those noninferior solutions. From the design phase in multiple criteria decision making, multiple objective mathematical programming is used to formulate a continuous network design model. However, from the phase of evaluation, multiple criteria decision making to solve the discrete network design problem. The network of metropolitan Taipei is taken as an example to illustrate the operation of this model.     

图的闭通路覆盖数

本文研究了图的闭通路覆盖数的一些性质,获得了一些有意义的结果。提出了树的4-闭通路覆盖数的多项式时间算法。     

五体船波浪中运动与增阻的主片体协同优化研究

以波浪中的运动和增阻为目标,进行了五体船主体型线、片体主尺度和布置的协同优化。解决了型线自动变换、参数化自动建模及计算网格合并等关键技术,实现了五体船全船的自动建模。利用ISIGHT进行建模与水动力计算的集成,建立了主片体协同多目标优化系统。运用遗传算法进行多目标优化,结果表明优化后五体船运动和增阻都有所改善,并对非规则波中的情况进行了一定的探讨。