装备维修决策的经济分析方法

从经济角度分析,成本的高低是判断装备维修决策优劣的一条重要标准。本文介绍了成本现值法的具体内容,对如何应用成本现值法来选择成本最低的最佳装备维修方案进行了深入研究,并对运用该方法进行装备维修决策分析时应注意的问题作了进一步的说明。     

机载信息系统人机界面设计原则

本文突出了"以用户为中心"的设计理念,对人机界面设计的基本理论进行了研究,提出机载信息系统人机界面设计原则,在界面设计中遵循这些原则有助于提高机载信息系统的人机交互能力。     

雷管安全性与可靠性国内外标准比较

本文根据雷管安全性与可靠性国内外标准的情况,通过分别简单的介绍,分析了国内外标准的异同点,给出了关于我国雷管标准制修订的一点看法。     

纪念中国人民解放军建军80周年学术研讨会综述

根据中共中央关于隆重开展建军80周年活动的指示精神,经总政治部批准,由军事科学院举办的纪念中国人民解放军建军80周年学术研讨会,于2007年7月17日～18日在北京隆重召开.来自全军17个大单位和武警部队及中央有关科研单位的代表共58人出席会议.     

Optimal burn‐in procedure for periodically inspected systems

Burn‐in is a widely used method to improve the quality of products or systems after they have been produced. In this paper, we study burn‐in procedure for a system that is maintained under periodic inspection and perfect repair policy. Assuming that the underlying lifetime distribution of a system has an initially decreasing and/or eventually increasing failure rate function, we derive upper and lower bounds for the optimal burn‐in time, which maximizes the system availability. Furthermore, adopting an age replacement policy, we derive upper and lower bounds for the optimal age parameter of the replacement policy for each fixed burn‐in time and a uniform upper bound for the optimal burn‐in time given the age replacement policy. These results can be used to reduce the numerical work for determining both optimal burn‐in time and optimal replacement policy. © 2007 Wiley Periodicals, Inc. Naval Research Logistics, 2007     

Modeling and analysis of a mixed‐model assembly line with stochastic operation times

We consider a mixed‐model assembly line (MMAL) comprised a set of workstations and a conveyor. The workstations are arranged in a serial configuration. The conveyor moves at a constant speed along the workstations. Initial units belonging to different models are successively fed onto the conveyor, and they are moved by the conveyor to pass through the workstations to gradually generate final products. All assembling tasks are manually performed with operation times to be stochastic. An important performance measure of MMALs is overload times that refer to uncompleted operations for operators within their work zones. This paper establishes a method to analyze the expected overload times for MMALs with stochastic operation times. The operation processes of operators form discrete time nonhomogeneous Markov processes with continuous state spaces. For a given daily production schedule, the expected overload times involve in analyzing the Markov processes for finite horizon. Based on some important properties of the performance measure, we propose an efficient approach for calculating the expected overload times. Numerical computations show that the results are very satisfactory. © 2007 Wiley Periodicals, Inc. Naval Research Logistics, 2007     

大型水面舰艇舷侧水下防雷舱吸能结构论证设计

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地面战场多目标声探测识别系统的研究

讨论了声探测识别的原理,介绍了战场多目标声探测识别系统的构成及工作原理,对于系统构成的技术关键及解决途径进行了论述。     

全自动包装计量装置的研制

全自动包装计量装置是替代传统量具,以单片机为核心的智能控制器同新型包装机械相结合构成,可自动完成称重、夹袋、卸包和包装的机电一体化的全自动包装计量设备。本文论述了其设计原理、系统组成和特点。     

超宽带信号正交解调误差的分析及校正

在超宽带相参接收系统中,正交解调的 Ｉ、 Ｑ 两路输出的幅度和相位的不一致性以及直流偏置分量会严重影响系统的性能。本文就超宽带信号的正交解调误差对信号处理的影响进行了分析,提出了一种幅相特性不一致的校正方法,并给出了计算机仿真的结果。