耐久性及其在装备研制中的应用

机械产品在武器装备中占有较大的比例,机械产品的故障,有很多是由于疲劳、磨损、腐蚀、老化等渐变性的耗损过程造成的,寿命是机械产品可靠性中的重要问题。耐久性的提出为解决机械产品与寿命有关的问题提供了方法和工具。通过探讨耐久性的定义、极限状态、耐久性参数、耐久性分配与预计等有关耐久性的基本问题,给出了耐久性分配与预计的工程实例。     

Nonparametric estimation of some quantities of interest from renewal theory

In this paper, confidence intervals are given for two quantities of importance related to renewal processes. For each quantity, two confidence intervals are discussed. One confidence interval is given for general, all‐purpose use. Another confidence interval is given which is easier to compute, but not of general use. The case where data are subject to right censorship is also considered. Some numerical comparisons are made. © 2003 Wiley Periodicals, Inc. Naval Research Logistics 50: 638–649, 2003.     

机动条件下的公共计算平台研究

针对未来战术机动系统的作战要求,利用面向服务技术体制(SOA),结合段集成机制,提出了构建机动系统的轻量级公共计算平台。平台从层次上划分为系统服务层、核心服务层、基础服务层和公共应用服务四个层次,每个层次通过编程接口向上层提供服务,以支持机动系统的动态演化、灵活配置、动态部署与系统间的互操作和信息共享。     

基于均分簇算法的战争Ad Hoc网络广播风暴抑制

网络广播是维持网络正常运作的基本手段,但Ad Hoc网络拓朴的频繁变化,将使网络广播无法进行收敛,形成广播最终会使本来就受限的资源趋于濒绝,网络无法通信而瘫痪.为此,提出了一种自适应均分簇理论SACA,通过分层虚拟子网的过滤与阻隔算法,有效地抑制网络广播风暴.     

基于感知信息共享的C2网络特征分析*

指挥控制(C2,Command and Control)关系网络连接数的增加会增强指控节点之间的信息共享,但也会增加节点信息处理和交换负荷,如果达到一定程度,则会造成节点本身的"信息过载"从而影响C2网络性能.对此,通过研究C2网络在两种不同处理方式下的共享感知信息平均提交时间,用网络节点响应时间的均方差表征一个C2网络的共享态势感知时间的一致性,最后对两种不同结构C2网络特征参数的计算,说明了网络连接增加会导致信息提交时间的延长,但一致性会增强.     

应急净水系统作业性能试验研究

用应急净水系统净化不同水质的原水,以考察其作业性能。结果表明,出水浊度不受原水浊度的影响,且低于1NTU;在试验原水浊度、温度范围内,出水流量较稳定,产水量符合设计要求;出水水质符合生活饮用水卫生标准的要求。     

New product introduction against a predator: A bilevel mixed‐integer programming approach

We consider a scenario with two firms determining which products to develop and introduce to the market. In this problem, there exists a finite set of potential products and market segments. Each market segment has a preference list of products and will buy its most preferred product among those available. The firms play a Stackelberg game in which the leader firm first introduces a set of products, and the follower responds with its own set of products. The leader's goal is to maximize its profit subject to a product introduction budget, assuming that the follower will attempt to minimize the leader's profit using a budget of its own. We formulate this problem as a multistage integer program amenable to decomposition techniques. Using this formulation, we develop three variations of an exact mathematical programming method for solving the multistage problem, along with a family of heuristic procedures for estimating the follower solution. The efficacy of our approaches is demonstrated on randomly generated test instances. This article contributes to the operations research literature a multistage algorithm that directly addresses difficulties posed by degeneracy, and contributes to the product variety literature an exact optimization algorithm for a novel competitive product introduction problem. © 2009 Wiley Periodicals, Inc. Naval Research Logistics, 2009     

Patterns in spatial point locations: Local indicators of spatial association in a minefield with clutter

The problem of detecting a minefield in the presence of clutter can be abstracted to that of detecting a spatial pattern within a set of point locations. The point locations are superpositions of several patterns, one of which corresponds to mines. In contrast to previous articles that take a formal, model‐based approach, this article proposes a statistical methodology that is distinctly exploratory. Each point location is considered separately, and its contributions to a global measure of spatial distances between locations are featured. Different patterns and unusual points can be more easily identified on the new scale. Both minefield data and simulated point patterns demonstrate the power of the method. © 2001 John Wiley & Sons, Inc., Naval Research Logistics 48:333–347, 2001     

远距离测量物体横向微小位移的方法研究

针对传统方法无法对物体横向微小位移进行远距离测量的难题,分析现有测量手段的优缺点,结合一个实践案例,提出了一种传统光学仪器与现代数码产品和计算机智能识别技术相结合的新方法。     

Fleet management in European integration: the case of military helicopter support

The article focuses on both economics and spatial issues related to Maintenance Repair and Overhaul (MRO) of defence platforms in Europe. Using facts and figures related to costs, trends and fleet sizes evolution, the authors discuss the interest of a spatial reorganisation of MRO production. Given the fiscal situation of the main European countries with a modern army, the relevant scale to consider the reorganisation is certainly Europe. Through the example of defence helicopters fleets of a selection of European countries, the authors address the question of cooperation of the MRO. A greater cooperation in the support of fleets would lead to a spatial reorganisation of MRO. On one side economies can be expected from this reorganisation, but, on the other hand, new problems arise. Specifically, a number of costs associated with different forms of “distances” – geographical, operational and political distances – limit the potential savings that could be expected. This work provides insights on these important issues for the construction of a European defence, both in its political, military and industrial dimensions.