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本文论述了张钢仓储物资管理系统的设计与实现过程,系统的硬件布局及软件的功能特点,以及系统的实现. 相似文献
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探讨搭建省市县三级基层医疗信息平台,采用云计算部署方式,并保障系统的基础设施安全、软件安全、数据安全,实现省级居民健康惠民服务信息系统和基层医疗卫生管理系统建设,系统建设主要分为业务服务子系统、业务管理子系统、监督管理子系统三个部分. 相似文献
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主要介绍了ATM交换机控制管理系统软件的功能及结构,着重讨论了控制管理系统的外部接口和内部各功能模块的实现方法及交换机主备切换的设计实现。 相似文献
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定点运输车辆调度管理系统关键技术研究 总被引:1,自引:1,他引:0
提出了基于GPS/GSM/GIS的车辆管理系统结构,分析了无线通信链路、客户分中心与服务器通信模式设计等关键技术.针对砼罐车调度管理系统应用,深入分析了砼罐车调度管理系统功能需求和模块划分,研究了实现过程中3个关键技术:采用距厂距离变化率准则和方位一致性判断准则的联合判断准则提高去/回程判断准确性;采用B/S和C/S混合模式实现客户分中心与网络客户服务平台的通信;采用自动设定和手动设定相结合的方式实现目的地GPS位置设置/修订功能.最后给出了软件实现结果. 相似文献
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本文阐述GSM/CDMA直放站集中监控管理系统的网络结构,系统中心软件和直放站嵌入式软件及硬件的设计,并介绍了系统能实现的主要功能. 相似文献
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Michael Pecht 《Microelectronics Reliability》2012,52(6):953-957
Prognostics and health management (PHM) is an enabling discipline consisting of technologies and methods to assess the reliability of a system in its actual life cycle conditions to determine the advent of failure and mitigate system risks. This paper presents a case study of a failure that had a significant economic impact on the computer industry and its customers, and then discusses how PHM implementation could have resulted in a dramatic difference in the outcome. 相似文献
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《Reliability, IEEE Transactions on》2009,58(2):305-316
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电子元器件与系统是各种设备和系统中不可或缺的部分,其可靠性是整机系统可靠性的决定性因素。为实现系统状态的实时监控,提供失效预警,避免灾难性故障的发生,阐述了故障预兆与健全管理(PHM)用于电子元器件与系统可靠性预测的原理与方法,详细分析了预兆单元法、失效征兆监控法和寿命损耗检测法可行性。 相似文献
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A prognostics and health management roadmap for information and electronics-rich systems 总被引:4,自引:0,他引:4
Prognostics and systems health management (PHM) is an enabling discipline of technologies and methods with the potential of solving reliability problems that have been manifested due to complexities in design, manufacturing, environmental and operational use conditions, and maintenance. Over the past decade, research has been conducted in PHM of information and electronics-rich systems as a means to provide advance warnings of failure, enable forecasted maintenance, improve system qualification, extend system life, and diagnose intermittent failures that can lead to field failure returns exhibiting no-fault-found symptoms.This paper presents an assessment of the state of practice in prognostics and health management of information and electronics-rich systems. While there are two general methods of performing PHM—model-based and data-driven methods—these methods by themselves have some key disadvantages. This paper presents a fusion prognostics approach, which combines or “fuses together” the model-based and data-driven approaches, to enable markedly better prognosis of remaining useful life. A case study of a printed circuit card assembly is given in order to illustrate the implementation of the fusion approach to prognostics. 相似文献
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综合化航空电子系统PHM应用与设计 总被引:1,自引:0,他引:1
故障预测与健康管理(PHM)技术应用是保障电子系统任务完成成功率的重要手段和方法。对航空电子系统的PHM应用及设计思路进行了探讨,提出了PHM系统功能关系及适合综合化航空电子系统的健康管理体系。对PHM工程实现的主要关键技术及解决方案进行了研究,重点分析了基于测试性模型的多信号增强诊断方法,以及基于马尔科夫和贝叶斯网络的健康评估方法,对最终实现航空电子系统的PHM全面应用具有指导意义。 相似文献
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This paper presents a model that enables the optimal interpretation of prognostics and health management (PHM) results for electronic systems. In this context, optimal interpretation of PHM results means translating PHM information into maintenance policies and decisions that minimize life cycle costs, or maximize availability or some other utility function. The electronics PHM problem is characterized by imperfect and partial monitoring, and a random/overstress failure component must be considered in the decision process. Given that the forecasting ability of PHM is subject to uncertainties in the sensor data collected, the failure and damage accumulation models applied, the material dimensions and properties used in the models, the decision model in this paper addresses how PHM results can best be interpreted to provide value to the system maintainer. The result of this model is a methodology for determining an optimal safety margin and prognostic distance for various PHM approaches in single and multiple socket systems where the LRU’s in the various sockets that make up a system can incorporate different PHM approaches (or have no PHM structures at all).The discrete event simulation model described in this paper provides the information needed to construct a business case showing the application-specific usefulness for various PHM approaches including health monitoring (HM) and life consumption monitoring (LCM) for electronic systems. An example business case analysis for a single socket system is provided. 相似文献
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简要回顾了故障预测和健康管理的形成过程和发展历史,从主导思想、关键技术、应用层次和对故障响应方式等方面对比了与传统监控测试技术的区别。重点阐述了故障预测和健康管理的基本原理,通过引入系统健康状态分类和系统健康退化进程,提出了基于状态维修思想,分析了基于状态维修与事后维修和定期维修的区别。按照故障预测和健康管理的能力需求... 相似文献
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预测与健康管理技术是装备综合保障技术的核心之一,其不但能够实现武器装备性能状态的在线监测,还能实现故障的全方位预测、诊断、评估、决策和处理。文中对PHM方法作了概要性的介绍和总结,提出了一种基于PHM技术的水下航行体综合保障系统,并对系统的工作原理及各功能组成部分作了分析与讨论,同时对综合保障系统的保障效能、工作模式、指挥控制也作了相应介绍。 相似文献
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半导体级别故障预测与健康管理 总被引:1,自引:0,他引:1
随着集成电路特征尺寸按比例缩小,其可靠性问题越来越突出.为了避免因集成电路失效而发生灾难性后果,有必要对集成电路进行故障预测与健康管理.首先,介绍了故障预测与健康管理技术的发展概况;然后,阐述了实施半导体级别故障预测与健康管理的两个主要方法:预兆单元法和失效先兆监测推理法,并根据相关案例进行了分析;最后,指出了该技术面... 相似文献