基于作业成本法的武器装备定价分析

作业成本法是近年来在西方国家得到广泛关注的一种新型成本计算方法.其目的是运用以"作业"为核心的管理思想,把管理重心深入到作业层次,为产品的合理定价提供依据.介绍了作业成本法产生背景及原理,建立了基于作业成本法的武器装备定价模型,分析了其适用性,为武器装备的定价提供了借鉴.     

武器装备发展战略概述

武器装备的质量已经成为衡量一个国家国防现代化水平的重要标志之一.武器装备发展战略研究的主要目标是保证装备整体作战能力的提高.在综述武器装备发展战略概念及其相关问题的基础上,结合我军当前武器装备发展情况和面临的机遇,提出了加速我军武器装备跨越式发展的建议与对策.     

Algorithm to solve a chance‐constrained network capacity design problem with stochastic demands and finite support

We consider the problem of determining the capacity to assign to each arc in a given network, subject to uncertainty in the supply and/or demand of each node. This design problem underlies many real‐world applications, such as the design of power transmission and telecommunications networks. We first consider the case where a set of supply/demand scenarios are provided, and we must determine the minimum‐cost set of arc capacities such that a feasible flow exists for each scenario. We briefly review existing theoretical approaches to solving this problem and explore implementation strategies to reduce run times. With this as a foundation, our primary focus is on a chance‐constrained version of the problem in which α% of the scenarios must be feasible under the chosen capacity, where α is a user‐defined parameter and the specific scenarios to be satisfied are not predetermined. We describe an algorithm which utilizes a separation routine for identifying violated cut‐sets which can solve the problem to optimality, and we present computational results. We also present a novel greedy algorithm, our primary contribution, which can be used to solve for a high quality heuristic solution. We present computational analysis to evaluate the performance of our proposed approaches. © 2016 Wiley Periodicals, Inc. Naval Research Logistics 63: 236–246, 2016     

船海复合场景面元化快速电磁建模方法及SAR成像仿真

在微波高频段,海面背景或海上船类目标往往具有电大尺寸和复杂精细的结构,这给船海复合场景的电磁建模带来巨大的计算负担。为简化计算,基于海面电磁散射模型面元化思想和图形电磁学,结合计算耦合场的四路径模型,提出一种电大尺寸船海复合场景电磁散射的快速计算方法。在保证海面与目标复合散射场的计算准确性前提下,提高计算效率。仿真并分析不同雷达参数下动态海面与目标的雷达散射截面,计算结果与实测数据以及精确数值方法结果的良好一致性验证了方法的准确性。将复合散射快速计算方法应用于合成孔径雷达成像仿真,仿真结果验证了方法的有效性。     

车辆类型 质量和尺寸的特别决议研究

介绍了S.R.1《在全球技术法规中使用的统一定义和规程的特别决议》的起草过程,S.R.1规定的车辆一般定义、分类、质量和外形尺寸;对比分析了我国国家标准与S.R.1的主要差异。     

全球技术法规研究

介绍了全球技术法规的由来,全球技术法规制定进展情况,全球技术法规与我国汽车标准的对应关系;分析了全球技术法规对我国汽车行业的影响。     

军用方舱气密性在“三防”中的应用研究

本文结合某军用方舱研制过程中对舱体板片合拢、舱门、孔口盖、通风孔口、空气加热器、空调、操纵件、电器元件的密封性设计,介绍了一些确保军用方舱气密性,提高“三防”能力的方法。     

部队作战能力评估程序研究

本文从简介美军作战能力评估程序出发,在系统分析部队作战能力评估程序的概念与构成要素的基础上,将部队作战能力评估程序划分为部队作战能力评估准备、部队作战能力评估实施和部队作战能力评估结果处理三个阶段,并详细阐述了每个阶段的具体步骤,形成了一套较为规范的部队作战能力评估程序.     

A novel modeling approach for express package carrier planning

Express package carrier networks have large numbers of heavily‐interconnected and tightly‐constrained resources, making the planning process difficult. A decision made in one area of the network can impact virtually any other area as well. Mathematical programming therefore seems like a logical approach to solving such problems, taking into account all of these interactions. The tight time windows and nonlinear cost functions of these systems, however, often make traditional approaches such as multicommodity flow formulations intractable. This is due to both the large number of constraints and the weakness of the linear programming (LP) relaxations arising in these formulations. To overcome these obstacles, we propose a model in which variables represent combinations of loads and their corresponding routings, rather than assigning individual loads to individual arcs in the network. In doing so, we incorporate much of the problem complexity implicitly within the variable definition, rather than explicitly within the constraints. This approach enables us to linearize the cost structure, strengthen the LP relaxation of the formulation, and drastically reduce the number of constraints. In addition, it greatly facilitates the inclusion of other stages of the (typically decomposed) planning process. We show how the use of templates, in place of traditional delayed column generation, allows us to identify promising candidate variables, ensuring high‐quality solutions in reasonable run times while also enabling the inclusion of additional operational considerations that would be difficult if not impossible to capture in a traditional approach. Computational results are presented using data from a major international package carrier. © 2008 Wiley Periodicals, Inc. Naval Research Logistics, 2008     

载人航天器低空救生仿真

在载人航天器低空救生中,回收系统开伞点的初始状态参数如速度、离地面高度、弹道倾角对返回舱能否安全着陆有很大影响.与正常返回类似,低空救生中的回收系统同样经过多级伞的拉直、充气、全充满等运动过程.通过建立回收系统着陆过程的动力学模型,经过大量仿真对比分析,得到开伞点离地面高度为低空救生中返回舱安全着陆的首要因素,同时对低空救生中回收系统多级伞开伞减速过程有了详细的分析.