α—Fe2O3气敏元件的可靠性环境试验

探讨了α－Ｆｅ２Ｏ３半导体气敏元件的可靠性环境试验方法，对该元件的可靠性环境试验结果进行了数据处理和统计分析；探讨了该元件的主要失效模式，运用不同的评定方法对元件的环境应力适应能力进行了定量估计。     

抗震结构动力可靠性的结构响应级数拟合法

对可靠性界限为随机变量时的抗震结构动力可靠性问题,采用一种级数对结构响应加予拟合,从而提出了结构动力响应级数拟合法。     

先漏后爆准则的研究

先漏后爆(1eak—before—break，LBB)准则是评价压力容器特别是核能设备的一个重要的准则。随着人们对高压容器特别是核能设备安全性要求的提高，先漏后爆准则的重要性不断增加。但是，该准则在许多方面还不完善，需要科技人员进一步研究。同时，该准则并没有得到应有的重视。首先介绍了先漏后爆的概念和分析过程，并从穿透裂纹的扩展特性，泄露面积和泄漏率的计算，可靠性在LBB分析中的应用等几个方面对LBB研究的发展进行了概述。     

混合摩擦滑动轴承的模糊可靠性设计

本文应用模糊数学原理研究了混合摩擦滑动轴承的模糊可靠性设计计算方法,导出了相应的计算公式,并给出了应用实例。     

Tradeoff Analysis for RMS of Equipment Based Operation Availability and Life Cycle Cost

Reliability, maintainability, supportability (RMS) are the important performance indexes of equipment, which affect not only the availability, but also the life cycle cost (LCC) of the equipment. First discussed is the qualitative relation between reliability and LCC and the costs which may be used to enhance the reliability. Secondly, the factors that affect the maintainability are summarized, and if maintainability is advanced, the trend of the LCC is depicted. Thirdly, the qualitative relation between th...     

Minimum-Weight Design of Multipurpose Tie-Beam of Solid Cross-Section

The paper presents the minimum-weight design of an elastic, simply-supported member of solid cross-section that is to act as a tie for a part of its design life and as a beam for the rest, but not both at any given time. Upper bounds are prescribed on the longitudinal elongation under an axial tension and on the maximum deflection under a transverse concentrated load. The range of constraints is divided into regions of possible single-purpose minimum-weight designs. The effectiveness of optimization is judged against a prismatic bar having the same transverse stiffness.     

Boolean difference techniques in fault tree analysis

For an electrical, mechanical, or hybrid system described diagramatically as a network of interconnected components, fault tree modeling of system reliability as a function of individual component failure probabilities gives rise to logic expressions obtained from the network connections. Application of the method of Boolean differences in the analysis of such Boolean expressions is discussed, and it is shown that the influence of the status of specific components on the reliability of the total system may be investigated by straightforward algebraic operations on the network failure function.     

基于潮流跟踪的最小负荷削减费用计算

电网可靠性的经济性价值日益受到人们的重视,如何对其进行定量计算具有重要的现实意义.该文建立了体现电网可靠性经济价值的负荷削减费用模型,模型中综合考虑了节点负荷用户类型的分类和缺电损失评价率随停电时间的变化情况.在潮流跟踪法的基础上,提出了衡量负荷削减对缓解系统过负荷支路程度的经济性指标,并利用该指标对模型进行求解.算例结果验证了该方法的有效性和实用性.     

软件可靠性预测的增强贝叶斯组合模型

针对当前可靠性预测模型的预测精度问题,提出一种增强贝叶斯组合的短期软件可靠性预测模型。该模型以基于小波分解的单个可靠性预测模型作为基本预测模型, 根据当前相邻几个失效时间间隔的预测精度,更新组合模型中各个基本预测模型的权重,解决了贝叶斯组合模型权重计算采用全部历史数据而导致某个基本预测模型权值占主导地位的缺陷,提高了贝叶斯组合模型对软件可靠性的预测精度。实验结果表明,增强贝叶斯组合预测模型的预测精度不仅优于单一的预测方法,而且也优于传统的软件组合预测模型,能显著提高软件可靠性预测的精度和模型对数据的适应性。     

基于可靠性设计的新型潜水钟计算机控制系统

本文简要介绍了潜水钟控制系统的组成及针对潜水钟使用要求和特点所采取的措施, 并对调试中出现的问题及解决方法作了详细分析．