可靠度

RET could improve the reliability of products by improving the quality of design and manufacturing process. By using the interference model and the deuced formula, two ways of improving the reliability of products were analyzed. And also the basic principle of RET was explained based on the model.

在此基础上，运用干涉模型和可靠度计算公式，分析了强化试验提高产品可靠性的2种基本途径：改进设计和提高工艺水平，进一步阐述了可靠性强化的基本原理。

By analyzing the interdependence between the operating stress f0und in RET and the stress in actual operation environment,the formu／a for reliable probability was deduced based on interference mode1.Then an example was given to explain this approach's feasibility.RET could improve the reliability of products by improving the quality of design and manufacturing process.By using the interference model and the deuced formula,two ways of improving the reliability of products were analyzed.

应力强度干涉模型根据产品的应力和强度相互关系分析产品的失效，在传统可靠性工程中主要应用于机械产品可靠性分析，本文将这一模型理论运用于可靠性强化试验中，推导出了利用，强化试验数据计算产品可靠度的相关公式，将定力量分析引入RET中，解决了RET无法进行定量分析的问题。

The paper also investigates the direct numerical integration method to calculate the reliability of struacture and develops a computer program.

并对直接积分法在系统可靠度计算中的应用进行了研究，编制了相应的分析程序。

The matching device automatic test-board is the checking tool checked the matching device capability, precision and reliability are the technique of the the matching device, the precision is the precondition of checking the matching device, the reliability is credibility degree of the decision checking consequent.the topic in view of the existing technique level, the main factors, which influence the measurement precision of the large scale test system, are analyzed in this paper, and the solutions improving the precision are put forward.1 using the multi-channel independent ac to transfer dc module, the power supply of the digit part and the simulation part is discerption, reducing the crosstalk between the digital signal and the simulated signal;2the feedback self-checking module is constructed by singlechip compositive 16 high accuracy a/d , established a closed-loop control system through this module and improved system's overall precision effectively.

匹配装置自动测试台是检测匹配装置性能的检测工具，其重要的技术指标是精度与可靠性，其高精度是作为检测匹配装置的前提，可靠性是决定了检测结果的可靠度。本课题针对现有的技术水平，分析了影响大型检测系统测量精度的主要因素，提出了提高精度的具体方案和办法：1采用了多路独立交流转直流模块，数字部分与模拟部分分开供电，减小了数字信号与模拟信号之间的串扰。2利用单片机集成的16位高精度a/d构建了反馈自检模块，通过该模块建立了一个闭环控制系统，有效地改善了系统的整体精度。

The authors studied carefully two numerical differential methods, finite difference method and rational polynomial technique, and pointed that FDM is the special ease of RPT when the limit state function is linear. Accordingly, FDM3 can be used for the continuous linear limit state function and RPT5 for the continuous nonlinear limit state function. For the discontinuous limit state function, RPT should be used because of the large error of FDM.

对于可靠度分析中常用的有限差分法及有理多项式法这两种数值微分方法，本文详细研究了二者间的异同及其求导结果与步长的关系，指出了对于相同的步长控制系数及取样方式，FDM是RPT在线性情况下的特例；对于连续的线性功能函数，可直接用3点FDM求导；对于连续的非线性功能函数，可用5点RPT求导；对于非连续的功能函数，应采用RPT求导。

For making the new technique of tension strength testing method have the good and practical value,and avoid causing the large discreteness in the applicatin.

为了使抗拉强度检测新技术具有良好的实用价值，避免在应用中有较大的离散性、此利用这种检测方法的结果，有必要讨论在给定可靠度的置信区间。

The sum of disjoint products method is efficient for computing the reliability of a network.

不交和方法是一种有效的计算网络可靠度的方法。

A new algorithm for generating the sum of disjoint products is proposed.

给出网络可靠度一种新的不交和算法。

Presents an algorithm for generating the sum of disjoint products by using binary decision diagram as well as certain ordering role of paths and Boolean algebra formulas.

利用二分决策图，同时采用道路排序技巧及布尔代数运算给出了求不交和的方法，它比单纯采用二分决策图的算法更简单，不交和的项数更少，从而得到一个求网络可靠度的有效算法。

Stochastic variables included driven accelerations, driven time, torques, frictions and damps were considered basically. In the first, Monte Carlo method was applied to generate stochastic variables and dynamical responds of mechanism. Secondly, the application of Artificial Neural Network was motivated by the approximate concepts inherent in reliability analysis and time consuming repeated analyses required for MC.

将驱动加速度、驱动时间、摩擦和阻尼力等作为随机变量，应用蒙特卡罗方法，取得动态参数样本，再利用人工神经网络方法，根据抽取的样本对网络进行训练，统计网络输出得到动态应力分布，进而求出机构动态强度可靠度。

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。