试论GIS在城市规划中的应用

GIS作为近年来兴起的一门信息科学 ,在许多方面有着广泛的应用。本文在论述了城市规划一般原理的基础上 ,探讨GIS在其中应用的可能性及如何应用GIS为城市规划服务     

多属性决策(MADM)在防空C~3I系统效能评估中的应用研究

介绍了防空C3I系统效能的定义及效能评估的一般处理过程。通过专家群组决策确定效能指标体系 ,针对效能指标的多样性 ,提出了基于多属性决策 (MADM )的效能评估方法 ,并通过一个示例给出MADM方法的处理过程 ,有效地解决了防空C3I系统效能评估这一复杂而困难的问题。     

IDEF0方法在军事综合电子信息系统分析设计中的应用

就IDEF0方法在军事综合电子信息系统分析设计、系统升级与集成及仿真等方面的应用进行了深入探讨。由于IDEF0模型具有简单、全面且描述能力强等优点 ,使其在多个领域尤其在制造业中得到了广泛应用。军事综合电子信息系统是以活动为支撑 ,以信息为基础的复杂大系统 ,用IDEF0模型对其进行描述可以加深指挥人员和技术人员对系统的共同理解 ,从而提高系统开发的效率并提高系统的实用性。     

Optimal material control in an assembly system with component commonality

Allocation of scarce common components to finished product orders is central to the performance of assembly systems. Analysis of these systems is complex, however, when the product master schedule is subject to uncertainty. In this paper, we analyze the cost—service performance of a component inventory system with correlated finished product demands, where component allocation is based on a fair shares method. Such issuing policies are used commonly in practice. We quantify the impact of component stocking policies on finished product delays due to component shortages and on product order completion rates. These results are used to determine optimal base stock levels for components, subject to constraints on finished product service (order completion rates). Our methodology can help managers of assembly systems to (1) understand the impact of their inventory management decisions on customer service, (2) achieve cost reductions by optimizing their inventory investments, and (3) evaluate supplier performance and negotiate contracts by quantifying the effect of delivery lead times on costs and customer service. © 2001 John Wiley & Sons, Inc. Naval Research Logistics 48:409–429, 2001     

Effectiveness of (R,Q) policies in one‐warehouse multiretailer systems with deterministic demand and backlogging

Consider a distribution system with a central warehouse and multiple retailers. Customer demand arrives at each of the retailers continuously at a constant rate. The retailers replenish their inventories from the warehouse which in turn orders from an outside supplier with unlimited stock. There are economies of scale in replenishing the inventories at both the warehouse and the retail level. Stockouts at the retailers are backlogged. The system incurs holding and backorder costs. The objective is to minimize the long‐run average total cost in the system. This paper studies the cost effectiveness of (R, Q) policies in the above system. Under an (R, Q) policy, each facility orders a fixed quantity Q from its supplier every time its inventory position reaches a reorder point R. It is shown that (R, Q) policies are at least 76% effective. Numerical examples are provided to further illustrate the cost effectiveness of (R, Q) policies. © 2000 John Wiley & Sons, Inc. Naval Research Logistics 47: 422–439, 2000     

Applying a bootstrap approach for setting reorder points in military supply systems

This paper develops and applies a nonparametric bootstrap methodology for setting inventory reorder points and a simple inequality for identifying existing reorder points that are unreasonably high. We demonstrate that an empirically based bootstrap method is both feasible and calculable for large inventories by applying it to the 1st Marine Expeditionary Force General Account, an inventory consisting of $20–30 million of stock for 10–20,000 different types of items. Further, we show that the bootstrap methodology works significantly better than the existing methodology based on mean days of supply. In fact, we demonstrate performance equivalent to the existing system with a reduced inventory at one‐half to one‐third the cost; conversely, we demonstrate significant improvement in fill rates and other inventory performance measures for an inventory of the same cost. © 2000 John Wiley & Sons, Inc. Naval Research Logistics 47: 459–478, 2000     

自行武器GPS/INS组合导航系统的设计

介绍了某自行武器的 GPS/ INS组合导航系统的设计方案 ,内容包括该系统的数学模型、信息融合和系统仿真。实验结果表明 ,该设计改善了系统性能 ,提高了导航定位的精度、可靠性和实用性     

论装备保障信息资源管理

根据信息资源管理的基本理论给出了装备保障信息资源管理的定义和基本要求 ,针对我军装备保障信息资源管理中存在的问题 ,提出了初步的改进设想     

病态信息控制的理论与方法研究进展

论述了“病态信息”概念的形成过程及初步定义 ,讨论了病态信息的危害 ,阐述了病态信息研究的目的意义 ,阐明了国内外相关研究的基本情况、主要观点及其对病态信息的控制产生的影响 ,提出了病态信息控制的理论与方法的框架体系结构 ,最后综述病态信息研究的主要进展情况、主要应用情况及发展前景。     

基于信息神经网络的内燃机故障诊断方法

在统计概率基础上建立了信息神经网络 ,探讨了利用该网络诊断内燃机故障的方法 ;并在 1 2 1 50L内燃机上进行了模拟故障的诊断试验。试验结果表明 ,该方法是可行的。