调度自动化系统数据接收、转发硬软件的功能及其改进

文章介绍了茂名供电分公司调度自动化系统的结构、硬软件功能并作如下改进 :(1)将站端信号经光纤通道直接接入MOXA卡 ,使通讯速率提高 16倍 ,误码率大大减少。 (2 )通过修改程序 ,增加遥信确认功能 ,减少了遥信乱告警、乱打印问题。 (3)通过改动程序 ,使 2台前置机都能向通道发送选择命令和执行命令 ,大大提高了遥信成功率。总之 ,通过改进 ,其运行稳定 ,维护、扩容方便 ,安装Pcanywhere软件后可实现远方诊断和修改。     

铁路列车无线调度电话干扰问题初探

说明了铁路天津枢纽地区无线列车调度电话系统使用现状,筒单分析了干扰产生的原因,探讨了解决干扰问题的几点设想。     

宁夏电力公司调度数据网络(电厂监控系统)安全防护体系的实施

对宁夏电力系统计算机网络的实际状况进行了深入分析,在确保技术先进,经济实用的原则下。提出了针对供电局地调自动化系统,电能量计量计费系统与MIS系统安全隔离问题及发电厂网控、DCS系统与MIS系统安全防护问题的解决方案。建立健全了宁夏电力计算机网络安全防护体系,为电网安全、稳定、经济运行提供保证。     

基于组件的Web计算及其在水电调度中的应用

该文分析了基于组件的Web计算的体系结构，给出了其中的关键技术，重点分析了中间应用层及其实现技术。针对某水电梯级综合调度项目给予了实施，重点分析了数据库与组件的设计。认为它有着良好的应用前景。     

浅谈突发事件应急物资调度

我国目前处在突发公共事件的高发时期,灾害对人们生命财产的威胁日益严重,而救援物资应急调度是防灾减灾的关键环节。本文就突发事件及其应急物资调度的研究进行了介绍,并提出了相应的改进方向。通过该研究对协调城市社会发展二元矛盾,塑造新型和谐社会关系具有现实意义和长期的战略性意义。     

Effects of Dispatching and Routeing Decisions on the Performance of a Flexible Manufacturing System

This paper is concerned with the effects of dispatching and routeing decisions on the performance of a flexible manufacturing system (FMS). Three routeing policies, no alternative routeings, alternative routeings dynamic, and alternativerouteings planned are first considered with four dispatching rules with infinite buffer capacity. However, in real-life, the size of the local buffers in FMSs may be limited by the size of the part types. Therefore, further experiments to investigate the above three routeing policies with the four dispatching rules with finite buffer capacity are also conducted in order to study the impact of limited buffer capacity on system performance. In addition, the effect of changing part mix ratios is discussed with both infinite and finite buffer capacity. The performance measures considered are makespan, average machine utilisation, average flow-time, and average delay at local input buffers. The simulation results indicate that for infinite buffer capacity, the alternative routeings planned policy, combined with the shortest total processing time dispatching rule, gives the best results for all the above performance measures. For finite buffer capacity, the alternative routeings dynamic policy gives the best results in three performance measures, except for average delay at local input buffers. Further, the effect of changing part mix ratios is not significant. ID="A1"Correspondance and offprint requests to: Dr F. T. S. Chan, Department of Industrial and Manufacturing Systems Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong. E-mail: ftschan@hkucc.hku.hk     

高性能数控系统软件划分与调度

讨论了高性能数控系统的功能特征，介绍了一种数控系统软件划分方法及其调度策略，提出“任务模块”和“资源模块”的软件划分思想。最后给出一实际任务划分和调度实例。     

Dynamic Scheduling for a Flexible Manufacturing System - The Pre-emptive Approach

This paper presents a simulation model of a flexible manufacturing system (FMS) which minimises three performance criteria simultaneously, i.e. mean flow-time, mean tardiness, and mean earliness. The dispatching rule will be changed at a frequency that is varied by the quantity of output produced by the system. Therefore, the dynamic system is an event-trigger rather than triggered by changing the rule at regular time intervals, which is passive. Three indices are used to represent the three criteria being monitored, and the indices are ranked in descending order. The larger the index, the worse is the condition of the criterion in the system. An appropriate rule will be selected for the next operation in order to tackle that criterion with the largest index. This mechanism is called the pre-emptive method. Furthermore, the indices can be biased by the decision maker so that a particular criterion can have larger weighting. Results show that a solution (range of frequency) can always be obtained for changing the dispatching rule so that the system is better than one which just uses fixed FMS scheduling rules.     

泉州市水资源综合调度平台设计与应用

基于泉州市水资源条件、水治理体系与治理能力的现状，针对水资源调配工程体系缺乏开展科学调度的非工程配套措施等实际问题，为有效保障新时期发展阶段全市居民与工农业的用水供水安全，泉州深度融合水资源智能预测与调配模型，基于多源异构、纵横联动、共享服务的水利大数据与智慧水利基座提供的底层支撑能力，通过多业务联动的大数据分析与计算，构建综合决策智能应用，建立以水资源调配业务为核心的综合平台。最大程度赋能水资源优化配置与供给保障，为泉州现代水网工程体系实现“多源互补、丰枯调剂、环境优美”的目标提供有力支撑与强力驱动，助力破解新时期泉州市发展面临的水资源制约问题，为省市一级智慧水利体系的规划建设提供参考，助力国家新阶段水利高质量发展。     

Hybrid genetic algorithms with dispatching rules for unrelated parallel machine scheduling with setup time and production availability

This article considers the unrelated parallel machine scheduling problem with sequence- and machine-dependent setup times and machine-dependent processing times. Furthermore, the machine has a production availability constraint to each job. The objective of this problem is to determine the allocation policy of jobs and the scheduling policy of machines to minimize the total completion time. To solve the problem, a mathematical model for the optimal solution is derived, and hybrid genetic algorithms with three dispatching rules are proposed for large-sized problems. To assess the performance of the algorithms, computational experiments are conducted and evaluated using several randomly generated examples.