查询词典 reliability

Owing to the complexity of CIMS' missions,the reliability modeling should adapt the production processes accurately.Conventional reliability model method can not reflect the time dynamic behavior of CIMS,so the multitask reliability model based on generalized stochastic Petri nets is established for a CIMS manufacturing shop with multiple missions and the process times of the machines with exponential distributions.Furthermore,analysis of GSPN model based on behavior expression and moment generating function is presented,then can compute the transfer functions.Finally,the multitask reliability can be easily obtained without the reachability graph of Petri nets,which measure can reflect the operating performance of the whole multitask CIMS more intuitively.

CIMS生产的复杂性要求其可靠性模型可以精确地反映生产过程，由于传统的可靠性建模方法无法兼顾CIMS的时间动态特性，所以针对一个复杂的有多个加工任务的CIMS制造单元，由于其机器加工工件的时间均为指数分布，则采用广义随机Petri网进行多任务可靠性建模，在此基础上基于Petri网行为表达式，将矩母函数思想引入其中，不必生成可达标识图就可通过计算模型的传递函数，进而得到整个系统的多任务可靠度，该可靠性指标可以更直观地反映具有多种加工任务的整个CIMS的运行性能。

The semi-low normal distribution membership function of fatigue limit is determined, and the anti-fatigue fuzzy reliability compute formula of rotor is deduced. The fuzzy reliability model of rotor anti-fatigue is set up. Taking an internal shaft of the rotor of aero electric generator for an example, its reliability design can be realized by adopting the anti-fatigue reliability design theory presented in the dissertation.

首次确定出了疲劳极限降半正态分布形式的隶属函数，推导出了转轴抗疲劳的模糊可靠度计算公式，建立了转轴抗疲劳的模糊可靠性模型；以航空发电机转子内轴为例，对其进行了抗疲劳的可靠性设计，并用本文建立的抗疲劳的模糊可靠度计算公式，对其进行了模糊可靠性校核。

The research is comprised mainly of four aspects: bounds of network reliability; performability of network reliability; lumpability problems of network reliability models; fuzzy analysis methods of network reliability.

研究内容主要包括四个部分：网络可靠性界的计算、网络综合可靠性分析方法的研究、马尔可夫型可修网络系统中聚合问题的研究以及网络的模糊可靠性分析方法的研究。

The generalized reliability of single failure mode component and unit structure under different kinds of uncertainty factors is treated perspicuously and classified. Combined with the three class fortify standard of aseismic design code,the conception of reliability vector of structures and systems with intermediate state before failure is put forward, and the calculation model of reliability vector with three stage working modes of "safety-intermediate-failure" and the operation rules of reliability vector of the simple aseismic engineering systems composed by structures are established.

针对各种不确定性因素下的单失效模式构件和单体结构，进行了广义可靠性的明晰化分类处理，结合抗震设计规范的三级设防标准，提出了具有中介状态结构与系统可靠性向量概念，建立了具有"安全-中介-失效"三级工作模式的可靠性向量计算模型，及其由结构组成的简单抗震工程系统的可靠性向量运算规则。

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。

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 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。

Then, using nondeterminism analysis method, at the based of summering reliability basic theory and present reliability assessment method, aiming at the limits of present reliability analysis method, the improved response surface method of higher pile-column bridge pier structural system is presented for reliability calculation by introducing response surface method.

此外，采用非确定性分析方法，在总结可靠度基本理论及现有可靠性分析常用方法的基础上，针对现有方法的局限性，引入响应面方法，建立高桥墩-桩基结构体系稳定的改进响应面方法。

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。

Article 144 The Government of the Hong Kong Special Administrative Region shall maintain the policy previously practised in Hong Kong in respect of subventions for non-governmental organizations in fields such as education, medicine and health, culture, art, recreation, sports, social welfare and social

第一百四十四条香港特别行政区政府保持原在香港实行的对教育、医疗卫生、文化、艺术、康乐、体育、社会福利、社会工作等方面的民间团体机构的资助政策。原在香港各资助机构任职的人员均可根据原有制度继续受聘。

Small wonder, then, that the Chinese spend more in the shop than any other group of foreign visitors do .

这样的小惊喜，使中国顾客比任何国家的人消费得更多。