共查询到20条相似文献,搜索用时 46 毫秒
1.
2.
3.
4.
5.
6.
基于事件的舰载机出动回收作业流程建模方法 总被引:1,自引:0,他引:1
为构建基于舰载机出动回收作业流程剖面分析规范化的合理逻辑模型,采用IDEF0设计框架及Petri网工具对其进行离散事件建模,搭建工程经验与仿真模型间的桥梁。根据工程经验,依照面向过程的IDEF0设计框架,理清舰载机出动回收作业流程中各组件系统间的信息交互和互操作关系,完成活动模型,以明确该流程中的事件触发规则和顺序,并根据活动对应变迁、信息流对应库所的原则,构建舰载机出动回收作业流程Petri网模型,形成工程研制者及仿真研发者均能接受的舰载机出动回收作业流程逻辑仿真模型,该Petri网模型也可直接应用于舰载机出动回收作业流程离散事件系统的功能仿真。 相似文献
7.
作战指挥控制流程是影响军队作战效能的重要因素。从作战指挥控制流程的特点出发,描述了一个应用G2软件建立指挥控制流程仿真模型的方法,对比介绍了几种现有的流程建模方法。利用G2/ReThink对描述的指挥控制流程进行建模和仿真,并简要开发了一个防空指挥控制流程仿真模型。通过对作战指挥控制流程的仿真,为流程的优化和改进提供了决策支持。 相似文献
8.
物流系统中的配送系统是复杂的离散事件动态系统,本文利用面向对象技术和Petri网技术相结合的复合模型对关键的出入库业务进行建模分析,按面向对象方法对系统进行抽象分类,利用Petri网技术来记录事件动态过程,从而有效解决离散事件复杂,并发冲突等特性,以提升配送系统的整体运作效率。 相似文献
9.
10.
11.
12.
价值观是指人们对价值的性质标准、构成和评价的基本看法和态度,是指导人的行为的一系列基本准则和信条。构建海事核心价值观是时代发展的要求,更是海事自身发展的需要。 相似文献
13.
This chapter presents a summary of the findings of the workshop on ‘Analytical and Institutional Methods and Frameworks’. The paper discusses the nature of the analytical methods used in the papers presented and the purposes for which they were employed, which were generally to either assist in the planning and operation of public transport or to monitor the efficiency and effectiveness of transport services. Subsequent sections examine issues related to data collection and management, and the more general issue of institutional arrangements. Policy and research agendas needed to support further consideration of the subject are then identified. 相似文献
14.
介绍青藏高原多年冻土的冻融特性,并结合我局在青藏铁路十二标段的具体施工,分析了冻土的冻融特性及具体防止措施. 相似文献
15.
16.
17.
Geoffrey Wood 《Maritime Policy and Management》2004,31(2):157-171
This paper explores the current state of coastal and inland shipping in Tanzania. It provides an overview of the state of ports and shipping in Tanzania, and the reasons underlying the present crisis of competitiveness in terms of both global pressures and national and regional dynamics. Problems of competitiveness are at least partially due to under-investment, management failures, skills shortfalls and difficulties in interfacing with the railway network. Less easy to resolve structural problems include the great imbalance between imports and exports, heightened regional competition and ongoing political instability in the Great Lakes region. 相似文献
18.
风量与风压的简易测量及应用 总被引:2,自引:0,他引:2
锅炉正常燃烧必须有充足的风量,当锅炉鼓风或引风不足将导致锅炉效果恶化,锅炉出力、热效应率明显下降。结合工程实例,介绍结托管简揭测试鼓、引风系统各部分风压、风量,帮助判断分析工程实际问题的简便方法。 相似文献
19.
20.
Elizabeth A. Wilman 《Coastal management》2013,41(3):211-230
As the controversy over Outer Continental Shelf (OCS) oil and gas leasing continues, with environmentalists and fishermen seeking to block or delay leasing decisions that they think will adversely affect their interests, the need for better estimates of the environmental costs associated with OCS development becomes increasingly apparent. Although high degrees of precision in such estimates may never be economic, let alone feasible, better knowledge would reduce the uncertainty surrounding the magnitude of such costs, and would make it easier to come to grips with the problem and reduce, if not resolve, the controversy. 相似文献