露天矿设备调度图表绘制及设备时间利用率分析系统

针对人工绘制露天矿设备调度图表存在的费时费力、效率低、缺乏纠错手段等问题,以规范化、模块化、智能化、可视化为目标,确定了系统功能和新的故障处理业务流程,设计了数据库、图表绘制、故障指标统计与可视化展示等技术方案,并以Visual C# 2013为集成开发平台、以SQL Server 2008为后台数据库,开发了扩展性和实用性较强的露天矿设备调度图表绘制与管理系统,实现了调度图表的智能可视化,提高了统计信息的实时性和准确性。经抚顺西露天矿数据检验,取得了较为满意的效果。     

网络化调度平台中数字签名技术的应用

文中建立了电力调度系统中综合令(即只涉及到一次设备初、末状态的调度命令)的网络化审批流程,在此基础上开发了调度联网发令系统,以该系统为核心,结合智能图形界面、数据库以及系统的管理和维护,建立了网络化调度操作平台.并通过引入数字防伪签名技术、基于角色存取控制的权限设置以及软件逻辑闭锁,解决了电力调度网络审批的安全问题.     

调度端二次系统安全防护及变电站自动化系统安全综述

结合华东电力调度中心安全防护的实施,分析了调度中心生产控制大区内不同系统的安全问题及防护要点;通过对华东电网500 kV站内自动化系统主要设备的安全测试所发现问题的分析,强调了纵向认证加密防护的必要性.      

KJ201B井下人员定位系统在翟镇煤矿的研究与应用

翟镇煤矿利用现有通讯技术,结合实际,探索应用了KJ201B井下人员定位系统,提高了企业调度工作的工作效率,一定程度上提高了矿井的应急救援和抗灾能力,取得了良好的经济效益和社会效益。     

基于零件虚拟工序队列的FMS动态调度研究

提出虚拟工序队列的概念,并在此基础上提出一种基于静态零件分批（静态调度）的ＦＭＳ动态生产调度方法,该算法充分考虑到ＦＭＳ的系统资源限制及零件运输等环节,能较好地解决生产调度中的设备负荷平衡,系统紧急事件发生（如机床故障,新零件加工等）,可替代加工工序等问题,且易于实现,具有较广泛的适应性。     

FMS在线刀具管理系统研究

提供了一种刀具管理软件框架结构，提出了刀具调度优化目标非线性规划数学模型，研究出一种工业衫性启 式在线刀具动态调度算法。     

巴音郭楞管理局水利信息化系统建设探索

结合巴音郭楞管理局对水利信息化系统的需求,首先介绍了信息化系统的建设背景以及原有系统的局限性;围绕以智慧水利建设推动组织机构调整的总体建设目标阐述了信息化系统的设计思路、总体框架、网络结构,详细介绍了系统的建设内容,包括现地监测监控系统、网络与安全系统、支撑平台系统、一体化管控平台应用系统、智能应用系统;组织机构调整的目标、具体设置、调整时或可存在的问题及对策,以期对类似水利工程的信息化建设提供参考。     

The evaluation of search range assignment in 300 mm automated material handling system (AMHS)

In the 300 mm AMHS with a connected loops layout, the vehicle can travel not just in one loop but all around the wide fab to execute tool-to-tool delivery. Determining how far the waiting FOUPs (WFs) or idle vehicles (IVs) should be considered before selecting a dispatching rule might make dispatching more efficient. A two-phase approach with simulation has been developed to assign the search range (SR) for studying this idea. The model of a simplified 300 mm AMHS was built using eM-Plant and Design Expert to design experiments and analyse the results. In phase I, the number of WF and IV in the system at the time of dispatching will affect the distance of the vehicle’s empty trip (DVemp). Further, the SR was assigned and evaluated based on the average and standard deviation of DVemp under different numbers of WF and IV in phase II. The results indicated that the SR significantly affects the performance, and a longer SR used in a light system is feasible; a shorter SR is applicable for a heavy system.     

Control point policy: part 1–efficiency within make-to-order environments

The recognition of the desire for punctual delivery of products has lead to the use of the service level as a common performance criterion for measuring the proportion of products that meet due dates specified by the customer. To successfully increase the service level, a manufacturing system may respond more quickly to orders by reducing the levels of in-process inventory in the system and hence decrease throughput times. This paper examines the use of the recently developed Control Point Policy (CPP) in improving service levels in re-entrant, ‘make-to-order’ manufacturing systems and compares its effectiveness with that of the Critical Ratio scheduling rule. Simulation studies have been undertaken to provide insight into how and when to apply the CPP policy within such environments with results indicating that, in cases requiring small storage areas between machines, the CPP results in better service level performance.     

Effectiveness of vehicle reassignment in a large-scale overhead hoist transport system

This paper proposes an efficient vehicle reassignment dispatching rule and demonstrates the effectiveness of the rule using an overhead hoist transport (OHT) system for a semiconductor fabrication line. The OHT system has more than 150 OHT vehicles and its target vehicle utilization level is 70%. It allows direct delivery such that an inter-bay wafer movement can be accomplished by a single vehicle. Simulation analysis is used to compare the proposed rule with the shortest travel distance first (STDF) rule and existing reassignment-based rules. While STDF rule requires 170 vehicles for the target utilization level, the proposed vehicle reassignment rule requires only 161 vehicles. At the same time, the lead time and the variance of the lead time have been significantly reduced. The proposed rule also improves system performance compared to existing reassignment-based rules.