装备器材库温湿度监控系统的设计与实现

军用装备器材仓库温湿度监控是目前亟待解决的问题.文中详细地阐述了种切实可行的设计方法--主从式两级数字化监控系统的设计原理与实现方法,并用Borland C++Builder语言对其组态软件进行程序设计.     

Waiting time analysis for a queueing system with time‐limited service and exponential timer

We consider a single‐queue with exhaustive or gated time‐limited services and server vacations, in which the length of each service period at the queue is controlled by a timer, i.e., the server serves customers until the timer expires or the queue becomes empty, whichever occurs first, and then takes vacations. The customer whose service is interrupted due to the timer expiration may be attended according to nonpreemptive or preemptive service disciplines. For the M/G/1 exhaustive/gated time‐limited service queueing system with an exponential timer and four typical preemptive/nonpreemptive service disciplines, we derive the Laplace—Stieltjes transforms and the moment formulas for waiting times and sojourn times through a unified approach, and provide some new results for these time‐limited service disciplines. © John Wiley & Sons, Inc. Naval Research Logistics 48: 638–651, 2001.     

基于运动状态和敌我属性的空中目标融合识别

研究了基于实时跟踪器的空中目标航迹身份识别问题。从分析目标运动状态和敌我属性的不确定性出发 ,建立了空中目标身份统计模型 ;根据建立的模型 ,通过采用Dempster Shafer证据理论方法 ,对空中目标进行融合识别。仿真实验结果证明了模型和算法的有效性。     

机载激光雷达数据的三维深度学习树种分类

针对传统基于激光雷达(Light Detection And Ranging,LiDAR)数据的树种分类方法难以直接且全面地利用点云的三维结构信息的问题,提出一种基于三维深度学习的机载LiDAR数据的树种分类方法.该方法直接从三维数据中抽象出高维特征,而无须将点云转化为体素或二维图像.以塞罕坝国家森林公园内白桦和落叶松...     

Local search methods for the discrete time/resource trade-off problem in project networks

In this paper we consider the discrete time/resource trade-off problem in project networks. Given a project network consisting of nodes (activities) and arcs (technological precedence relations), in which the duration of the activities is a discrete, nonincreasing function of the amount of a single renewable resource committed to it, the discrete time/resource trade-off problem minimizes the project makespan subject to precedence constraints and a single renewable resource constraint. For each activity, a work content is specified such that all execution modes (duration/resource requirement pairs) for performing the activity are allowed as long as the product of the duration and the resource requirement is at least as large as the specified work content. We present a tabu search procedure which is based on a decomposition of the problem into a mode assignment phase and a resource-constrained project scheduling phase with fixed mode assignments. Extensive computational experience, including a comparison with other local search methods, is reported. © 1998 John Wiley & Sons, Inc. Naval Research Logistics 45: 553–578, 1998     

仿真计算机和仿真软件发展

介绍仿真机和仿真软件的发展,分析了银河仿真机系统性能,探讨了仿真机的未来发展特征。     

软件无线电的关键技术及其发展趋势

软件无线电技术近年来得到了较快发展,其主要是利用软件来实现无线通信系统中的各种功能。介绍了软件无线电的关键技术、评价标准和发展过程,并展望了软件无线电的发展前景。     

应用SoC实现装备维修改造的研究

片上系统(SoC)技术是近年来随着微电子技术发展出现的新技术,现已被广泛应用.利用SoC可以将原来由许多芯片完成的复杂功能,集中到一块芯片中完成,以获得更高的系统性能.以某火控系统中的模拟量输入通道为例,阐述了通过SoC技术,用基于FPGA/CPLD的方法对火控系统硬件电路进行维修改造,从而探讨了解决装备维修问题的一种方法.并讨论了改造过程中单稳态触发器96L02的替代问题,以及FPGA/CPLD与外围电路的驱动能力问题.     

基于不确定性理论的研制技术风险评估方法研究

分析了装备研制技术风险的含义,根据技术风险的特点建立了评价技术风险的指标体系。在技术风险度量中引入不确定性理论的概念,并建立了基于不确定性的技术风险的度量方法,对综合技术风险进行评价。最后通过实例验证了综合评价方法的可用性。     

改善逆变器输出电压波形的研究

在115 V/400Hz逆变电源中,A/D转换器引起的量化误差对系统的影响是造成系统不稳定的主要因素之一.通过对逆变器反馈通道误差的分析,采用全波整流电路对115 V/400 Hz逆变电源中A/D采样电路进行了改进,减小反馈通道误差,使逆变器的稳态电压输出波形质量得到显著改善.