浅谈装备技术状态控制与监督

装备技术状态控制是技术状态管理的重点与核心,贯穿于技术状态项目研制、生产全过程,也是军事代表开展技术状态管理监督的重点。本文主要对技术状态控制和监督的内容进行了介绍,并着重介绍了在控制和监督过程中应注意的几个问题。     

War reserve spares kits supplemented by normal operating assets

In peacetime, base stock levels of spares are determined on the assumption of normal resupply from the depot. In the event of war, however, a unit must be prepared to operate from stock on hand for a period of time without being resupplied from the depot. This paper describes a mathematical model for determining such war reserve spares (WRS) requirements. Specifically, the model solves the following kind of optimization problem: find the least-cost WRS kits that will keep the probability of a stockout after K cannibalizations less than or equal to some target objective α. The user of the model specifies the number of allowable cannibalizations, and the level of protection that the kit is supposed to provide. One interesting feature of this model is that in the probability computation it takes into account the possiblility of utilizing normal base operating assets. Results of a sensitivity analysis indicate that if peacetime levels were explicitly taken into account when designing a WRS kit, a cost saving of nearly 40 percent could be effected without degrading base supply performance in wartime.     

舰艇雷达隐身及雷达散射截面预估研究

分析了舰艇雷达隐身的原理和方法,论述了舰艇外形对雷达散射截面的影响,提出了建立舰艇雷达散射截面预估程序的基本思想．     

某型船机舱通风系统设计

根据某型船机舱设备及其布置特点,按照机舱通风系统设计要求,计算确定了前、后机舱通风量．根据机舱通风量和抽风式通风组织方案,选择了合适的通风设备．在设计中分析比较了若干通风系统设计方案,最后确定采用抽风式机舱通风系统．该船航行试验证明,机舱通风系统设计十分成功．     

An economic sequential screening procedure for limited failure populations

An economic sequential screening procedure is considered for limited failure populations in which defective items fail soon after they are put in operation and nondefective ones never fail during the technical life of the items. A cost model is constructed that involves screening test cost and external failure cost. A sequential scheme that minimizes the expected cost is derived from the solution of a dynamic programming formulation and the optimal decision at each stage is obtained in a closed form. © 1994 John Wiley & Sons, Inc.     

位置差分GPS定位误差分析与远距离差分试验

本文从GPS定位位置的求取公式出发,分析了GPS定位误差、位置差分GPS定位误差及其均方阵,由此证明位置差分GPS定位方法可以消除GPS定位误差中的较大部分。远距离静态差分试验表明:差分后定位误差drms值由33米下降到3.8米。     

基于能量均衡的无线传感器网络生命周期延长策略

为了从能量均衡角度出发解决无线传感器网络生命周期延长问题,从而延长整个物联网生命周期,针对无线传感器网络节点遭遇"路由空洞"的时候出现路由中断和生命周期缩短现象,分析能量消耗原理,构建最优跳数模型和能量均衡协议,并提出采用能量均衡的思路减少节点能量消耗。实验仿真发现,应用能量均衡协议使无线传感器网络节点能量分布更加均匀,节点能量消耗时间明显变长,而个别节点能量消耗速度明显大于其他节点的情况得以减少,达到延长无线传感器网络生命周期的目的。仿真结果验证了该方法的可行性。     

微机数控定比运动速度插补的最小误差法

本文针对微机数控中检测一轴的运动、控制另一轴运动的定比运动,提出了一个控制速度插补的算法,证明了这种方法的最小误差特点,并进行了误差分析。     

滑动导轨等部件的微动态特性

1.简介 这份报告给出了关于传统的滑动导轨系统的一些实验结果,同时论及了机构的精密运动控制。 这些年来,诸如导轨、丝杠和其他驱动机构等机械部件的微动态特性,换句话说,就是在很小位移范围内的非线性传递特性。已成为精密机械工程研究的首要问题。超精密仪器、机床和半导体生产系统都对机械部件的控制精度提出了越来越高的要求。对于精