可靠性

The dissertation established the method and VE-AMSAA model of integrated evaluation of reliability based on varied population-environment data by using of reliability growth AMSAA model as foundation. By conversing time of test in AMASSA model, the difficulty in subinterval estimation of this integrated evaluation of reliability was solved and determination of environment conversion factors based on AMASSA model was also presented, including optimizing principle and method.

建立了基于可靠性增长AMSAA模型的变母体变环境数据可靠性综合评估方法和模型VE-AMSAA模型，通过对AMSAA模型中的试验时间进行折合，解决了变母体变环境数据可靠性综合评估的区间估计问题，并给出了基于AMSAA模型的环境折合系数的确定方法，包括优化准则、寻优方法。

Therefore, to explore and to establish appropriate software reliability model are of theoretical significance and practical value.

软件可靠性模型是软件可靠性分析和度量的基础，研究并建立合理的软件可靠性模型具有重要的理论意义和实用价值。。。

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。

Based on the theory of mechanical reliability design, the reliability of tapered interference joint of HSK toolholder is analyzed, the reliability model is established, and the general formula for reliability computation is presented.

采用机械零件强度可靠性设计的方法，对HSK工具系统锥面过盈配合的可靠性进行了分析，建立了刀柄锥面过盈配合的强度可靠性模型，并且应用应力—强度干涉理论推导出了可靠度的计算公式。

By the unserved energy cost quantifying the reliability benefits of alternatives, costs and benefits about electric power network reliability planning can be evaluated on a consistent and economic basis.

以用户缺电成本大小衡量可靠性效益高低，将规划的可靠性成本与可靠性效益统一在对电网的经济性评估上；通过构造缺电损失评价率给出缺电成本计算方法。

The reliability of some mechanisms is critical for the aerocraft safty and the the mission complement.

目前，机构运动可靠性是机械可靠性的最薄弱环节，成为制约整个飞行器可靠性提高的主要因素之一。

First, the least sample size for high reliability aviatic mechanical products in common experiment is calculated. And then the reason for performing small sample and extreme small sample test is discussed.

首先阐述了航空领域机械类高可靠性产品在常规可靠性试验时所需要最小子样数的确定方法，接着阐述了被迫采用小子样、极小子样可靠性试验的原因。

The above results are of general importance and can be used to improve the solder joint reliability of surface mount components with castellated solder fillet, the design level and the manufacturing process in SMT.

本文研究从提高SMT焊点可靠性、提高组装密度和避免焊点缺陷的角度出发，对高可靠性SMT焊点形态的设计和评价建立了四点规则，对提高有边堡钎料圆角形态表面组装元件的焊点可靠性、提高SMT工艺设计水平具有普遍意义。

In building the simulation models for manufacturing missions, based on the combination with the multi-agent method and the GOOPN method, the compoundable method is presented, which makes the models more intelligent. Based on the result above, combined with the GOOPN models and the GERTS model, we put forward EPN-GERTS model through embedding Petri net into GERTS model, which can simplify the complexity in building models, and also improve the defects of GERTS model in describing resource conflicts and Petri net model in building models. In building the simulation models for development missions, the improved GERTS model is present to describe the development processes in QRMS. Through dynamically computing the redo times in GERTS, the improved model can reflect the operation character of development process. The simulation results are more precise when we use the models above.

针对构建快速研制系统的仿真对象问题，提出了基于多Agent的快速研制系统可靠性复合仿真建模方法，增强了仿真模型的智能性；在此基础上，针对制造任务，将Petri网嵌入到GERTS网中，提出了用于快速研制系统制造任务可靠性仿真的EPN-GERTS模型，简化了建模过程，同时也能考虑任务之间的资源冲突；针对研制任务，提出了用于快速研制系统研制任务可靠性仿真的改进GERTS模型，该模型可以描述设计迭代过程的动态运行特点，使仿真结果更加准确。

The reliability of dynamitic system can be dealt with from two aspects, according to the reliability concept of traditional geodesy:(1). the internal reliability, which is defined as the ability to detect automatically bias in the model, it is often described by the minimum detectable bias.(2). the external reliability, which is described as the influence of undetected bias on the parameter estimates.

按照传统大地测量概念，组合动态定位系统模型的可靠性分析需考虑两个方面问题：(1)内部可靠性，它描述动态定位系统模型自动探测模型粗差或的能力，亦即能够自动检测到多小的粗差；(2)外部可靠性，它描述未检测到的粗差对状态估计结果的影响程度。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。