可靠度

Considering the uncertainty of the estimating reliability in the model, the theory of Bayes disk decision is used to solve the problem. The expected utility function is used to measure the uncertainty of the estimating reliability, and the Bayes decision rule for stopping reliability growth test is defined. In the end, an example is given to validate the feasibility of this method.

考虑到可靠度估计的不确定性，采用贝叶斯风险决策技术，通过期望效用函数量化可靠度的不确定性，并定义了停止可靠性增长试验的贝叶斯决策规则，最后给出了一个应用实例验证了方法的可行性。

And the structure reliability formula based on the improved vertex method was suit to multi-fuzzy variable and non-linear system.

针对模糊－模糊干涉模型和线性结构系统应用一般的顶点法给出了求解结构模糊可靠度计算公式；对具有多模糊变量非线性结构系统用改进的顶点法优化模型给出了求解结构模糊可靠度计算公式。

To analyze the reliability of oil pipeline ,the traditional methods of the evaluation for reliability ,based on the theory of reliability and supposal of failure rate ,regard the pipeline as a system of series connection or parallel connection .

对长输管道可靠性进行评估的传统方法是，将管道结构视为一个串联或并联系统，运用可靠性的理论概念和各种失效概率假设，以故障率的统计资料为计算依据来进行可靠度的计算分析，可靠度也采用故障率等参数来表达。

The theory of structural reliability used in the field of geotechnical engineering is briefly introduced.

本文介绍了结构可靠度理论，它是岩土工程的可靠度计算方法的基础。

Theory of system reliability of tunnel door and of tunnel lining and its application in engineering are mainly re...

本文主要研究隧道洞门结构体系可靠度和隧道衬砌结构体系可靠度的理论及其在实际工程中的应用。

From the lifespan of relay point of view, a reliability criterion was provided based on dynamic characteristics of anti-forces. Mathematical model of tolerance design with reliability was set up under usage of "stress-strength interference method", taken some critical dynamic characteristics as identification objects such beginning of contact separation speed, speed of collision and gag bit impact velocity. This model showed that lower values of characteristic parameters center and quantitative descriptively relationship between tolerance and product reliability. Multi-objective optimization model of relay tolerance distribution was completed when some factors such as reliability, processing costs and its feasibility into consideration. Based on Analytic Hierarchy Process to determine weight coefficients of various objectives, and usage of simulated annealing, this study performed optimal reliable tolerance allocation of space electromagnetic relay, and then key technology segments were analyzed, accompanying its course measured by controlling chart.

从继电器电寿命的角度，基于动态吸反力特性的配合提出了继电器的可靠性判别准则；在此基础上以触点分离初速度、触点碰撞速度以及衔铁碰撞速度等关键动态特性为判别对象，采用"应力-强度干涉法"建立了继电器可靠性容差设计数学模型，给出了下位特性参数中心值及其容差与产品可靠度之间的定量描述关系；综合考虑可靠度、加工成本及加工可行性等因素建立了继电器容差分配的多目标优化模型，基于层次分析法确定了各目标的权重系数，并采用模拟退火法实现了航天电磁继电器的可靠性容差最优分配；研究了继电器的关键工艺环节，并通过控制图对其过程能力进行了分析。

Judgement and Solution Methods of UMVUE ;2. The maximum likelihood estimate and uniformly minimal variance unbiased estimate of MTTF were made on the one-unit system whose lifetime was assumed to be on GAMMA distribution.

讨论寿命服从单参数GAMMA分布单元平均寿命的极大似然估计和一致最小方差无偏估计；应用BASU定理求出了单元可靠度及串联系统可靠度的一致最小方差无偏估计。

The universal generating function was adapted to analyze the reliability of multi-state system,and the optimal model was solved using genetic algorithm.

针对市场上可供选择单元的性能、可靠度和费用参数，建立了以系统费用最少为目标，以系统可靠度为约束条件的优化模型。

In this paper, the definitions of reliability and MTTF of unrepairable systems with fuzzy random lifetimes are given, respectively.

为了和传统可靠性理论保持一致，我们仍用系统可靠度和平均寿命作为衡量系统可靠性的主要指标，但是在这里我们给出了全新的定义，即系统可靠度定义为不可修系统在t时刻仍正常工作的平均机会，平均寿命定义为模糊随机不可修系统寿命的期望值。

In a probabilistic analysis of unrepairable systems, system behavior is described by reliability and mean time to failure, in which the reliability is defined by the probability of the random event "system is functioning at time t", and MTTF the expected value of random lifetime of system.

衡量不可修系统可靠性的指标主要是系统可靠度和平均寿命。其中系统可靠度定义为不可修系统在t时刻仍正常工作的概率，平均寿命定义为不可修系统寿命的期望值。

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。