失效分析

The faults of pipelines were separately treated in discrete random variable and continuous random variable using the probability analysis method and choosing the reasonably different probability models based on the fault statistics data of pressure pipelines extracted from random inspection, and the fracture failure probability of pressure pipelines was calculated using the fracture failure risk analysis system for pressure piping system containing defects.

以抽检得到的压力管线缺陷统计数据为依据，采用概率分析方法，通过合理选取不同概率模型，将缺陷分别按离散型及连续型随机变量进行处理，应用在役压力管道失效风险分析系统计算出管线的断裂失效概率。

They found that more than 80% of the failures can be attributed to fatigue or fatigue related failures and most of them occur at the screwed joint of the drill collar.

石油管材研究所对近几年失效事故进行分析，有80％以上失效属于疲劳或与疲劳相关的失效，其中绝大部分发生在钻铤的螺纹联接处用。

Considering the complex influence factors for the failure of drill stem,an analytic model for failure of drill stem based on support vector machine and cluster analysis theory was established.

针对钻具失效影响因素比较复杂的问题，建立了基于支持向量机和聚类分析理论的钻具失效原因分析模型。

The normal plate and fail plate in the same failure battery （12 V／7 Ah）were compared and analyzed. The results of SEM observation show that the surface structure of normal plates and fail plates were different.

此外，对同一失效电池中不同单格分别取正常的极板及失效的极板进行比较分析，扫描电镜结果显示：正常的极板及失效的极板的表面结构不同。

In the paper, based on the hypothesis that the failure of every poles is independent and by the method of reliability assign and reassign, the difficult problem of disposing the structure system reliability constraints is solved. Based on sensitivity information, the given system failure probability can be replaced by the sum of every element failure probability.

针对基于体系可靠性约束优化设计的关键问题一结构体系可靠性的分析和计算，在基于结构各单元失效相互独立假设的基础上，提出了以各单元失效概率摘要之和近似体系失效概率的处理方法，并给出了体系可靠性分配和再分配的方法，以确保结构体系在优化过程中的可靠性，实现了结构基于体系可靠性的优化设计。

In the paper, based on the hypothesis that the failure of every poles is independent and by the method of reliability assign and reassign, the difficult problem of disposing the structure system reliability constraints is solved. Based on sensitivity information, the given system failure probability can be replaced by the sum of every element failure probability. And then the structural optimization design based on system reliability is preceded.

针对基于体系可靠性约束优化设计的关键问题一结构体系可靠性的分析和计算，在基于结构各单元失效相互独立假设的基础上，提出了以各单元失效概率之和近似体系失效概率的处理方法，并给出了体系可靠性分配和再分配的方法，以确保结构体系在优化过程中的可靠性，实现了结构基于体系可靠性的优化设计。

Through the discussion on the calculating methods for failure probability of element section with the influence of one or more human errors ,a mathematic analytical formula under ideal known conditions is deduced.

通过对单个或任意多个人因差错影响下构件截面失效概率计算方法的分析讨论，推导出在理想已知条件下的数学解析求解公式；在考虑人因差错对结构参数影响程度的空间离散化后，得出了相应的简化计算方法；并以一个单筋梁的正截面为例进行了失效概率计算和人因差错影响程度分析。

Generally thermal aged and chemical poisoning can lead to the deactivation.

然后对催化器的失效机理进行了分析，重点研究了催化器的热失效和化学中毒失效。

The statistics of drill tool failures data from the oil field shows almost fatigue failures of drill tools are related to thread f...

现场钻具失效资料的统计分析表明，绝大多数的钻具失效都与连接螺纹的疲劳失效有关。

The reliability of single-disk, double-disks, multi-disks failure, and the system with redundant hardware are analyzed and calculated.

5分别对单个磁盘驱动器的可靠性、RAID-O级的可靠性、单盘失效、双盘失效、多盘失效以及加冗余支持硬件的系统的可靠性进行了分析和计算。

I am accused of being overreligious," she said in her quiet, frank manner,"but that does not prevent me thinking the children very cruel who obstinately commit such suicide.""

客人们在卡罗利娜·埃凯家里，举止就文雅一些，因为卡罗利娜的母亲治家很严厉。

Designed by French fashion house Herm è s, this elegant uniform was manufactured in our home, Hong Kong, and was the first without a hat.

由著名品牌 Herm è s 设计，这件高贵的制服是香港本土制造，是我们第一套不配帽子的制服。