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复杂系统维护策略最新研究进展:从视情维护到预测性维护 被引量:25
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作者 陆宁云 陈闯 +1 位作者 姜斌 邢尹 《自动化学报》 EI CAS CSCD 北大核心 2021年第1期1-17,共17页
对于复杂、可修复的工程系统,设备维护是确保系统安全性、可靠性、可用性的重要手段之一.系统维护策略已经历修复性维护、定时维护、视情维护等多种维护策略.其中,视情维护是目前最受关注的维护策略,它通过收集和评估系统的实时状态信... 对于复杂、可修复的工程系统,设备维护是确保系统安全性、可靠性、可用性的重要手段之一.系统维护策略已经历修复性维护、定时维护、视情维护等多种维护策略.其中,视情维护是目前最受关注的维护策略,它通过收集和评估系统的实时状态信息进行维护决策,具有全寿命周期内系统可靠性高、运营维护成本低等优点.近年来,随着物联网技术、信息技术和人工智能的快速发展,一种更新颖的视情维护策略——预测性维护逐渐成为领域研究热点.本文首先简要回顾了系统维护策略的发展历程;然后,重点介绍了视情维护的研究进展,根据决策支持技术的不同,将视情维护划分为基于随机退化模型的视情维护和基于数据驱动的预测性维护,对每类技术的发展分支与研究现状进行了疏理、分析和总结;最后,探讨了当前复杂系统维护策略面临的挑战性问题和可能的未来研究方向. 展开更多
关键词 系统维护策略 视情维护 预测性维护 随机退化模型 数据驱动
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A mixed stochastic user equilibrium model considering influence of advanced traveller information systems in degradable transport network 被引量:4
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作者 程琳 楼小明 +1 位作者 周静 马捷 《Journal of Central South University》 SCIE EI CAS CSCD 2018年第5期1182-1194,共13页
Advanced traveler information systems (ATIS) can not only improve drivers' accessibility to the more accurate route travel time information, but also can improve drivers' adaptability to the stochastic network cap... Advanced traveler information systems (ATIS) can not only improve drivers' accessibility to the more accurate route travel time information, but also can improve drivers' adaptability to the stochastic network capacity degradations. In this paper, a mixed stochastic user equilibrium model was proposed to describe the interactive route choice behaviors between ATIS equipped and unequipped drivers on a degradable transport network. In the proposed model the information accessibility of equipped drivers was reflected by lower degree of uncertainty in their stochastic equilibrium flow distributions, and their behavioral adaptability was captured by multiple equilibrium behaviors over the stochastic network state set. The mixed equilibrium model was formulated as a fixed point problem defined in the mixed route flows, and its solution was achieved by executing an iterative algorithm. Numerical experiments were provided to verify the properties of the mixed network equilibrium model and the efficiency of the iterative algorithm. 展开更多
关键词 mixed stochastic user equilibrium model degradable transport network advanced traveler information systems (ATIS) drivers' behavioral adaptability multiple equilibrium behaviors fixed point problem
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AGING PROPERTIES OF THE LIFETIME IN SIMPLE ADDITIVE DEGRADATION MODELS
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作者 Xiaohu LI Rongfang YAN Yiqiang ZHAO 《Journal of Systems Science & Complexity》 SCIE EI CSCD 2011年第4期753-760,共8页
This paper deals with the simple additive degradation models with single random effect. The authors further study the link between the aging property of the implied lifetime and that of the random variation. It is fou... This paper deals with the simple additive degradation models with single random effect. The authors further study the link between the aging property of the implied lifetime and that of the random variation. It is found that both the aging property of the random variation and the analytical behavior of the mean degradation path influence the aging behavior of the implied lifetime. 展开更多
关键词 decreasing reversed hazard rate (DRHR) failure rate increasing failure rate (IFR) increasing failure rate in average (IFRA) new better than used (NBU) STAR-SHAPED super-additivity.
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