保湿剂在装甲装备训练场防尘中的应用

介绍了保湿剂的防尘原理、效率和制法,阐述了保湿剂在构建绿色装甲装备训练场中的应用,对提高坦克成员的训练效果、延长装备的使用寿命和保护生态环境等均有重要意义.     

Designing acceptance sampling schemes for life testing with mixed censoring

Mixed censoring is useful extension of Type I and Type II censoring and combines some advantages of both types of censoring. This paper proposes a general Bayesian framework for designing a variable acceptance sampling scheme with mixed censoring. A general loss function which includes the sampling cost, the time‐consuming cost, the salvage value, and the decision loss is employed to determine the Bayes risk and the corresponding optimal sampling plan. An explicit expression of the Bayes risk is derived. The new model can easily be adapted to create life testing models for different distributions. Specifically, two commonly used distributions including the exponential distribution and the Weibull distribution are considered with a special decision loss function. We demonstrate that the proposed model is superior to models with Type I or Type II censoring. Numerical examples are reported to illustrate the effectiveness of the method proposed. © 2004 Wiley Periodicals, Inc. Naval Research Logistics, 2004     

Stein–Chen approximation and error bounds for order fill rates in assemble‐to‐order systems

Assemble‐to‐order (ATO) is an important operational strategy for manufacturing firms to achieve quick response to customer orders while keeping low finished good inventories. This strategy has been successfully used not only by manufacturers (e.g., Dell, IBM) but also by retailers (e.g., Amazon.com). The evaluation of order‐based performance is known to be an important but difficult task, and the existing literature has been mainly focused on stochastic comparison to obtain performance bounds. In this article, we develop an extremely simple Stein–Chen approximation as well as its error‐bound for order‐based fill rate for a multiproduct multicomponent ATO system with random leadtimes to replenish components. This approximation gives an expression for order‐based fill rate in terms of component‐based fill rates. The approximation has the property that the higher the component replenishment leadtime variability, the smaller the error bound. The result allows an operations manager to analyze the improvement in order‐based fill rates when the base‐stock level for any component changes. Numerical studies demonstrate that the approximation performs well, especially when the demand processes of different components are highly correlated; when the components have high base‐stock levels; or when the component replenishment leadtimes have high variability. © 2012 Wiley Periodicals, Inc. Naval Research Logistics, 2012     

舰艇对潜跟踪搜索仿真实验环境设计

以舰艇对潜跟踪搜索为仿真实验环境,围绕系统的设计与实现展开研究,分析了系统需求,人在回路的仿真设计,介绍了MVC体系结构原理,描述了系统功能,实现了舰艇对潜跟踪搜索仿真实验系统,最后进行了仿真实例分析.     

基于铽镝铁换能器的全保偏光纤磁场传感系统

制作了铽镝铁保偏光纤换能器,建立了全保偏马赫—曾德尔光纤干涉仪系统,采用工作点控制方法解调信号,实现了光纤磁场传感。该全保偏光纤干涉系统结构简单、抗干扰,有效解决了偏振不稳定问题。实验检测了系统对磁场幅度变化的响应特性,最小可测交流磁场信号为3×10-10T。     

Optimal control of a capacitated inventory system with multiple demand classes

This article studies the optimal control of a periodic‐review make‐to‐stock system with limited production capacity and multiple demand classes. In this system, a single product is produced to fulfill several classes of demands. The manager has to make the production and inventory allocation decisions. His objective is to minimize the expected total discounted cost. The production decision is made at the beginning of each period and determines the amount of products to be produced. The inventory allocation decision is made after receiving the random demands and determines the amount of demands to be satisfied. A modified base stock policy is shown to be optimal for production, and a multi‐level rationing policy is shown to be optimal for inventory allocation. Then a heuristic algorithm is proposed to approximate the optimal policy. The numerical studies show that the heuristic algorithm is very effective. © 2011 Wiley Periodicals, Inc. Naval Research Logistics 58: 43–58, 2011     

新型仿生防滑轮胎花纹布局优化研究

传统轮胎防滑是通过提高轮胎表面的磨擦阻力来达到防滑目的。采用章鱼吸盘原理,从轮胎花纹防滑特点和仿生学基本原理入手,是进行轮胎花纹设计的一个新的尝试。在综合考虑传统轮胎花纹设计与仿章鱼吸盘式轮胎布局优化基本要求的基础上,初步设计了五种方案,并归纳出设计公式,进而建立以距离为横坐标、有效面积为纵坐标的研究方法。最后,通过借助MATLAB仿真五种方案吸盘有效面积变化规律,表明仿章鱼吸盘的布局设计较为科学合理。     

交互多模型算法的无人机控制系统故障诊断

交互多模型算法是一种广泛用于各种结构与参数变化的动态系统自适应估计的有效方法.在建立无人机控制系统传感器和执行器的全局故障和局部故障模型的基础上,应用此方法对传感器和执行器的各种软硬故障进行诊断,应用所建立的数学模型与方法,对无人机传感器和执行器的局部与全局故障进行了仿真计算.在仿真过程中发现,与一般的多模型方法相比,此方法能够更加准确可靠地诊断故障,无延迟报警,算法简单.仿真结果验证了该方法的有效性.     

攻击型无人机巡弋搜索航路优化设计与仿真

为改进攻击型无人机待机段的飞行搜索性能,应用以最大值原理为基础的最优搜索理论对无人机待机搜索路线进行研究,得出光栅式、螺旋式和扫雪式三种搜索路线,并通过计算机仿真与传统的8字式搜索方式进行了比较.仿真结果表明,优化设计结果是合理的,证实了其有效性和可行性.     

推进军队政治工作信息化建设的几点思考

政治工作信息化建设是加快军队现代化建设的客观需要,又是充分发挥政治工作服务保障作用的必然要求。必须充分认清军队政治工作信息化面临的形势任务,加快建设步伐。要抓住关键,把握政治工作信息化建设的宏观思路;突出重点,打牢政治工作信息化建设的基础;采取有效措施,确保政治工作信息化建设的跨越式发展。