可靠度

Comparative study with triple module redundancy system and dual module hot standby system shows: the security of strategy 1 is greatest, but its reliability is lowest. The reliability of strategy...

与三模冗余和双机热备系统的对比研究表明，策略1的安全度最大，可靠度最小；策略2的可靠度最大，安全度在修复率为0.9时大于三模冗余和双机热备系统，在修复率为0时略低于三模冗余系统，而高于双机热备系统。

However, there is little discussion on reliability evaluation of nonworking redundant systems such as cold and warm stand-by systems in literature, especially there is no discussion in case of medium and small sample size.

本文结合总装备部九五预研重点课题《小子样系统可靠性综合方法研究》和我国工程实际，较系统地研究了常见各种贮备系统的可靠性评估问题，包括冷备和温备两种贮备类型，指数型和Weibull型两类部件，完全可靠、成败型和指数型三种开关，以及定数、定时、和定总时截尾三种指数型试验数据。对上述各种常见情况下的贮备系统，分别给出系统可靠度函数及其点估计，并用WCF方法导出了可靠度置信下限。

Based on the basic reliability computation, established the relationship between the load effect and basic stochastic variable dealing with statistical features of variables,and then established the state equation of limit.

基于可靠度基本理论，考虑变量的随机特性，建立荷载效应与基本随机变量之间的关系，建立极限状态方程，在此基础上进行拱坝的拱座—重力墩的抗滑稳定可靠度分析，计算其可靠指标β。

The method of determining the paths based on backtracking method according to the network is introduced.

针对该网络给出了基于回溯法的通路的确定方法，进而给出了通路的可靠度的计算公式，最后给出了由通路的可靠度计算系统可靠度的计算公式。

The strengthened depth and so on; on the other hand, the compound mode of those influencing factors in the design and the difference of theoretical model should not be ignored, So, a state equation of limit equilibrium, which was applied to stability analysis of soil nail structure, was set up considering the influence of inter-slice force and combining the idea of disturbance force of Sarma with slice method. In the design of timbering of excavation, the reliability theory was used to analyze not only the sensitivity of random variables, including index of reliability and safety factor, but also the relationship between them.

因此，在理论分析模型方面，应用Sarma所提出的扰动力概念与条分法相结合，建立了考虑条间作用力影响的土钉支护结构稳定分析极限状态方程；在开挖支护设计方面，运用可靠度理论分析了各项设计参数及其组合方式对安全系数与可靠度影响的敏感性，以及安全系数与可靠度的相互关系。

Considering nodal pressure as the evaluating indicator, functional reliability indexes of the nodes were calculated by the mean-first-order-second-moment method which was originally developed for structural reliability analysis.

在进行供水管网的抗震功能可靠度分析时，借鉴结构可靠度的分析方法，以节点水压为评价指标，采用均值一次二阶矩方法计算管网各节点的功能可靠度，该方法通过一次水力分析即可给出震后低压供水和渗漏状态下管网各节点的可靠性指标，较之前发展的随机模拟方法大为简化且概念清晰。

Considering nodal pressure as the evaluating indicator, functional reliability indexes of the nodes were calculated by the mean-first-order-second-moment method which was originally developed for structural reliability analysis.

在进行供水管网的抗震功能可靠度分析时，借鉴结构可靠度的分析方法，以节点水压为评价指标，采用均值一活动板房次二阶矩方法计算管网各节点的功能可靠度，该方法通过一次水力分析即可给出震后低压供水和渗漏状态下管网各节点的可靠性指标，较之前发展的随机模拟方法大为简化且概念清晰。

Finally,the calibration of the reliability-based factors of the frequent value and the quasi-permanent value of live loads is conducted by the Joint Committee method through an actual design,and the indices are proved to be reasonable and the new method is proved to be feasible.

最后，依据可靠度计算的校准法，结合具体工程进行了基于目标可靠度的可变荷载频遇值系数和准永久值系数的标定，通过设计实践证明所建议的目标可靠度指标值是合理的，采用的标定新方法是可行的。

The principle of reliability calculation is analyzed and by applying first order second moment method in structural reliability analysis of wing wall tunnel portal ,satisfying conditions acquired.

分析了可靠度的计算原理，介绍了用一次二阶矩阵法计算翼墙式隧道洞门的过程，提出了可靠度指标的满足条件，指出采用一次二阶矩阵法分析结构可靠度能够满足工程要求。

To counter the case which worm gear lost efficacy of rotating screen barrel rice mill ,reliability design theory was applied to analyze it.

针对旋筛式碾米机蜗杆传动时有失效的情况，运用模糊可靠性设计理论对蜗轮的强度进行分析研究，找出了蜗轮接触疲劳强度可靠度不足而失效的原因，将蜗轮材料由铸铁改为铝铁青铜，提高了蜗轮—蜗杆接触强度可靠度和弯曲强度可靠度。

Fancy gold-plated dangling earrings with facetted White Opal crystals.

花式镀金悬垂耳环与facetted白欧泊水晶。

This essay chooses the study aim from biology teachers in middle school in Shi Jiazhuang which tells us that most of the middle school biology teachers in Shi Jiazhuang have the"burnout", lower successfulness, individualize.

本文选取石家庄市初中生物教师作为研究对象，运用问卷调查的方法对石家庄市初中生物教师职业倦怠的现状进行调查，调查结果发现，石家庄市初中生物教师这一群体普遍存在职业倦怠，情感枯竭程度偏高，成就感偏低，去个性化程度最为严重。