可靠性

Evaluation of software reliability, which is an important content of software reliability research, can quantize Parameters of software reliability and make software more reliable.

软件可靠性评估是软件可靠性研究的重要内容，通过软件可靠性评估，量化软件可靠性有关参数，为软件的使用建立信心。

In the second part, the modelling problem of system reliability is studied from the point of view of sequential logic, so as to overcome the difficulties that the description and the analysis of large-complex repairable systems must depend on the state-transition graphs .

在第二部分中，论文从时序逻辑关系的角度研究了系统可靠性的描述问题，主要目的是为了寻求一种系统可靠性的模型方法，以解决目前多部件组成的复杂可修复系统的可靠性，必须依赖状态转移图才能进行描述与分析计算，使得对于比较大的系统的可靠性的描述和存储都有很大困难的状况。

The applications of combine environment reliability teston aerospace products during recent years are analyzed an d the test methods of stan d-alone-scale and system-scale reliability are summarized.

对近些年国内航天系统产品综合环境可靠性试验的应用实践进行了分析，归纳了单机和系统级产品可靠性试验的方法，对不同层次产品可靠性试验的特点和相互关系进行了探讨，提出了在可靠性试验应用实践中应注意的问题。

In the light of the requirement to reliability of protective relayings for HVDC power transmission system, the reliability models for several typical redundant configuration schemes are built based on the principle of reliability analysis for unrepairable systems with the structure of series-parallel connection, and the reliability of various redundant modes are compared.

根据高压直流输电保护系统的可靠性要求，基于不可修复系统串并联结构的可靠性分析原理，建立了几种典型冗余配置方式的可靠性模型，比较了各种冗余方式的可靠性。

The method of reliability predict and reliability distribute is shown, and the approach of improving ASEM reliability is presented.

根据航天电机的可靠性模型，结合应力分析，给出了航天电机可靠性预计和可靠性分配的方法，并给出了改进航天电机可靠性的一些措施。

The thesis outspreads a systematic and ever in-depth exploring research work on some core problems such as how to sum up system reliability from all parts information of system reliability, how to quantify the parts information and how to make the most use of the parts information considering the parts information in the type of engineering reliability analysis and reliability tests samples.

本文围绕着如何能够充分利用和量化系统各层次可靠性信息，特别是工程可靠性分析信息，也包括可靠性试验信息，以及如何逐级向上综合出系统可靠度等核心问题，对'小子样'下的系统可靠性评估方法展开了系统全面、层层深入的研究探索工作。

In this paper, an approach based on fuzzy prorating method and fuzzy synthetic assessment was proposed to allocate the reliability indices, by utilizing the existing reliability information from the similar version of aeroengine in the early design phase.

为了在可靠性指标分配时能充分利用相似旧机型已有的可靠性信息，提出在航空发动机初期设计的可靠性分配阶段采用模糊相似比例与模糊综合评判相结合的可靠性指标分配方法。

AbstractFor optimizing allocation of sectionalizing switch, and achieving the least total reliability cost in the case of satisfying the reliability of major users, this paper proposes an optimization method for feeder automation planning, in which genetic algorithm is used. In order to deal with complex tree-type structure of feeders, a smart reliability calculation method is developed.

摘要提出了一种馈线自动化规划模型，并采用遗传算法进行求解，以优化开关配置，使得在满足重要用户可靠性的前提下，可靠性总费用最校在配电网可靠性计算中，实现了一种非常灵活的可靠性算法，能够处理结构任意复杂的树型馈线。

Reliability evaluation of existing structures is shown from the angle of artificial neural network. The influencing factors and deformation characteristics of buildings above goafs are summarized based on the code of coal pillar design and pressed coal mining for buildings, water-bodies, railroads and main mine roadway. The model of neural network is build to solve the problems about complex influencing factors and long evaluating time of building evaluation. BP network model compared with traditional way has strong practicability and extension value.

本文从人工神经网络的角度着手，基于国家煤炭工业《建筑物、水体、铁路及主要井巷煤柱留设与压煤开采规程》，分析了采动区建筑结构的影响因素和变形特性，运用已有的采动区建筑物可靠性评估实例，建立了BP人工神经网络可靠性评估模型，对采动区在役结构可靠性进行了评估，较好地解决了采动区建筑物可靠性评估影响因素复杂和耗时长的问题。

Secondly, in spite of the reliability of software and control system, the mechanical system reliability of automatic yarn evenness tester is researched using FTA, and fault trees of each unit and system are established by analyzing its structure and function. According to system reliability theory and events probability, the mechanical system fault tree is analyzed by means of qualitative analysis and quantitative calculation, the system weak parts are found , and the ways are put forward to improve the mechanical system reliability.

其次，在不考虑软件及控制系统可靠性的情况下，利用故障树分析的方法，对全自动条干仪机械系统可靠性进行了分析研究，通过对其结构、功能的分析，建立了单个单元的故障树和系统的故障树；并根据系统可靠性的原理和事件发生的概率，进行了定性分析和定量计算，找出了系统的薄弱环节，提出了提高机械系统可靠性的途径。

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。