可靠度

Choosing reliability simulation data as a sample, the parameter confidence interval as coding space and the reciprocal of errors between empirical distribution function and acquired distribution function as a fitness function, the point estimation model of age distribution is established based on the genetic algorithm, and the reliability function of complex systems is acquired.

以可靠性仿真数据为寿命样本，待估计参数的置信区间为编码空间，以经验分布与所求分布误差倒数为适应度函数，建立了基于遗传算法的寿命分布参数点估计模型，求得了复杂系统可靠度函数。

The sensitivity formulations of the reliability index with respect to the parameter of structural local performance index are derived in detail.

提出了结构局部地震易损性的概念，通过构造结构局部性能指标与其参数之间的一个新的功能函数，给出了局部地震易损性的可靠度表达式；根据可靠性灵敏度的概念，提出了构造结构局部性能指标概率密度函数的新方法，并详细推导了结构可靠指标对局部性能指标参数的灵敏度表达式。

And then made the reliability analysis on the front axle by adopting the probability analytical software NESSUS of mechanical component parts and sy...

在计算过程中可靠度计算软件作为主程序，有限元软件作为子程序被调用。最后得出了前桥结构可靠指标值和各个参数的灵敏度和结构的设计验算点，为前桥的可靠性设计提供了依据。

The design of this system is reasonable and reliable. It can satisfyingly calculate and raise the reliability of non-electric initiating system

该系统设计合理，运行稳定、可靠，能满足计算、优化非电起爆网路可靠度的要求。

In the paper the theory of reliability has been summarized, and the program JC.

本文综述了可靠度分析理论，编制了可靠指标计算程序JC。

The resistance partial factors in design equations are adjusted in order to ensure the target reliability index. The recommended resistance factors are as follows 1.3 and 1.15 for calculating stability of sheet pile and anchorage respectively; 1.4 and 1.35 for calculating strength of sheet pile and tie rool respectively.

为使我国的板桩设计达到目标可靠指标，经过可靠度分析，建议板桩&踢脚&稳定性验算抗力系数调整为1.3，锚碇结构稳定性验算抗力系数、板桩墙抗弯强度作用效应综合分项系数和拉杆拉力分项系数仍分别取为1.15，1.4和1.35。

Finally, summing up the dynamic reliability theory thinking over time variant effect about load and resistibility and the standard grading partition of reliability calculation by quantification combining reliability target, the practical means resolving existent aqueduct bridge structure existing reliability problem, and put outing the means is practical and feasible in relation existent aqueduct bridge structure.

本文最后总结了考虑荷载和抗力时变效应的动态可靠度理论，结合基于可靠指标定量计算的可靠性等级划分标准，提出了解决现有渡槽结构存在的可靠性问题的实用方法，并通过计算证明该方法对现役渡槽结构是实用、可行的。

A technique for dealing with confidence limit-reliability-stress curves of up-and-down test was presented to obtain a more accurate endurance limit.

为获得安全可靠的疲劳极限，提出了处理升降法试验数据置信限－可靠度－应力曲线方法。

The critical loess slopes along the highways were the inputted form of slopes and measured values of cohesions and internal friction angles were the reference values of random variants. Monte-Carlo method was used to choose samples and the formula of the Bishop simplified method was regarded as control equation. The reliabilities of the loess high slopes in three positions of Shaanxi Province were simulated. Failure probability and reliability index were obtained.

以极限状态坡作为输入坡型，将陕西黄土地区公路勘察中实测的粘聚力和内摩擦角作为主要随机变量参考值，采用Monte-Carlo法抽样，简化Bishop法公式作为控制方程，对陕西地区3个地段的黄土高边坡进行了可靠度模拟，获得黄土高边坡的失效概率与可靠指标。

Then, safety analysis method was constituted considered the typical damage of concrete beam bridge. 5. By amending the reduction rate of loading capacity used in Code for Maintenance of Highway Bridges and Culvers (JTG H11-2004), a new reliable index is presented in the same safety standard to reflect the relation between load and resistance. According to the basic principal of calibration method, the recommended gradation index was computed under various factors such as different load combinations, vehicle operating status and different failure modes. With these calculated numerical values, the calculated reliability indexes standard for the estimation of safety degree of in-service concrete girder bridge members was ultimately obtained.6. Based on the related standards and results on crack and displacement that cannot continue to loading at home and abroad, the evaluation grade of the concrete beam bridge is proposed by analogy.

针对材料和构件损伤对混凝土梁式桥抗力的影响，基于材料和构件层次典型损伤的修正计算公式，在结构既有以及时变抗力评估的概率模型基础上，通过误差传递公式获得抗力统计参数，对抗力进行修正，构成了考虑混凝土梁式桥典型损伤的安全性分析方法。5、依据校准法原理，将《公路桥涵养护规范》(JTG H11-2004)中不同类别承载力下降率转化为修改分项系数，分别计算了轴心受压、轴心受拉、受弯、大偏心受压、受剪构件在各种情况下的可靠指标，根据破坏类型对校准结果进行分析，提出了基于可靠度的公路混凝土梁式桥安全性评定等级。6、基于不能继续承载的裂缝和位移的相关国内外规范和研究成果分析，通过类比提出了混凝土梁式桥不能继续承载的裂缝和位移评定等级界限。

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。