列车调度指挥信息系统实施分析

介绍了列车调度指挥信息系统的网络结构和功能以及信息数据流程，分析了系统实施后存在的问题，并提出了相关建议。     

水库滑坡现象与环境因素的关系

一、应用复杂开放系统的自组织理论解释滑坡现象的尝试耗散结构论、协同学及混沌理论等非线性科学 ,共同揭示了物质系统变化过程中的可逆与不可逆、有序与无序及这种矛盾相互转化的机理和条件。同时揭示了自然界物质系统如何从平衡到不平衡、从对称到非对称、从稳定到不稳定的演化和反演化的规律［１］。耗散结构理论认为 ,一个系统从初始的混沌状态出发 ,具有自催化能力的单元之间的竞争 ,能够通过一系列非平衡不稳定产生功能组织 ,而且“系统在获得时间的、空间的或功能的结构过程中没有外界特定的干预 ,我们便说系统是自组织的”。滑坡产…     

兴建江汉运河比上三峡二期工程好

一、江汉工程概要及其主要工程和资金来源按可持续发展和西部大开发要求 ,应该兴建江汉运河。其中 :从沙市的荆江最险段盐卡建闸(要求应具备分洪、排沙和通航的性能) ,直至新滩口附近燕窝村开挖运河(简称西运河) ,全长约200公里 ;再从长江东岸渡普经武昌附近斧头湖、梁子湖等湖泊至鄂城至樊口闸再入长江 ,兴修另一段运河(简称东运河) ,约60公里。东西运河共计约260多公里 ,其中需开挖220公里。而这段长江航线则是710公里 ,估计可缩短航程450公里。这样选线 ,既有利于减少开挖土方工程量 ,更有利于分洪与排沙 ,原因是由于裁弯取直而增加了比…     

用遗传算法解决一类模糊流水车间调度问题

对同时考虑模糊加工时间和模糊交货期的模糊流水车间调度问题进行了研究 ,模糊加工时间用三角模糊数来表示 ,模糊交货期用梯形模糊数来表示。应用遗传算法搜索最优排序 ,在适应度函数处理中引入模糊数处理方法 ,以平均满意度最大作为优化目标。最后给出了实验结果和结论     

极小化不可行量函数的Flow Shop变异问题

讨论一类Flowshop的变异问题。在这类变异问题中 ,给定一个截止工期 ,该工期比Flowshop最优调度中的最大完工时间小。讨论的问题是在全部工件的完工时间不超过截止工期的限制下 ,极小化不可行量函数。这类问题与矩阵函数因子分解有着密切联系。基于对问题的分析 ,证明了这一问题等价于单机调度中极小化类似的延迟量函数。推广了已有的结论。     

LOGISTICS SCHEDULING： ANALYSIS OFTWO-STAGE PROBLEMS

This paper studies the coordination effects between stages for scheduling problems where decision-making is a two-stage process. Two stages are considered as one system. The system can be a supply chain that links two stages, one stage representing a manufacturer; and the other, a distributor It also can represent a single manufacturer, while each stage represents a different department responsible for a part of operations. A problem that jointly considers both stages in order to achieve ideal overall system performance is defined as a system problem. In practice, at times, it might not be feasible for the two stages to make coordinated decisions due to (i) the lack of channels that allow decision makers at the two stages to cooperate, and/or (ii) the optimal solution to the system problem is too difficult (or costly) to achieve.Two practical approaches are applied to solve a variant of two-stage logistic scheduling problems. The Forward Approach is defined as a solution procedure by which the first sta     

FROM MANUFACTURING SCHEDULING TO SUPPLY CHAIN COORDINATION：THE CONTROL OF COMPLEXITY AND UNCERTAINTY

With time-based competition and rapid technology advancements, effective manufacturingscheduling and supply chain coordination are critical to quickly respond to changing marketconditions. These problems, however, are difficult in view of inherent complexity and variousuncertainties involved. Based on a series of results by the authors, decomposition and coordination byusing Lagrangian relaxation is identified in this paper as an effective way to control complexity anduncertainty.A manufacturing scheduling problem is first formulated within the job shop context withuncertain order arrivals, processing times, due dates, and part priorities as a separable optimizationproblem. A solution methodology that combines Lagrangian relaxation, stochastic dynamicprogramming, and heuristics is developed. Method improvements to effectively solve large problemsare also highlighted. To extend manufacturing scheduling within a factory to coordinate autonomicmembers across chains of suppliers, a decentralized supply chai     

延炼润滑油技改工程防洪排洪设计

延炼润滑油技改工程占地地形复杂，一面临山，三面环河，由于此特殊的地理位置．因此该工程的防洪排洪设计至关重要；本文就该工程的防洪排洪设计过程作一论述。