失效

Process Failure Mode and Effects Analysis ; Relationship Matrix ; Axiomatic Design ; Product Design Quality ; Power Supply Design

制程失效模式与效应分析；关联矩阵；公理设计；产品设计品质；电源供应器

Because the value estimated of reliability characteristic parameters has large error when the number of failure data is fewer by using maximum likelihood estimator, a modified maximum likelihood estimator has been put forward.

本文研究了环境温度、接触压力及电负载对继电器接触可靠性的影响，研究了继电器在常用负载—低电平和中等负载下发生接触失效的机理。

In order to unchange products failure mechanism, the problem of maximum stress is discussed under accelerated life test.

提出了控制产品承受最大应力的措施，以保证在加速试验下产品的失效机理不发生变化。

Of the actual pump output too small, a large number of medium circulation pump, heat accumulation, caused by gasification medium, resulting in seal failure

对泵实际输出量偏小，大量介质泵内循环，热量积聚，引起介质气化，导致密封失效

The actual output of the pump too small, a large number of medium circulation pump, heat build-up caused gasification medium, resulting in seal failure

对水泵实际输出量偏小，大量介质泵内循环，热量积聚，引起介质气化，导致密封失效

Based on the macro and micro fracture characteristics of the transmission shaft fracture surface and the metallogenetic structures, mechanical properties, hardness and chemical compositions, the failure reasons of the main transmission shaft were studied.

在传动轴断口宏微观特徵观察的基础上，综合主传动轴的金相组织、力学性能、硬度以及化学成分等，对主传动轴断裂失效的原因进行研究。

The cause of fracture of a water supply valve used was analyzed by macrophoto,chemical composition analysis,metallography and mechanical performance.

针对使用中的自来水阀体断裂破坏，进行了宏观形貌、材质化学成分、金相组织、力学性能等失效分析工作。

High-velocity impact on spacecraft by meteoroid and space debris is a threat to its safety operation,that can in turn lead to significant damage and catastrophic failure.

微流量及空间碎片的高速撞击威胁着航天器的安全运行，导致其严重的损伤和灾难性的失效。

On the basis,the numerical response to micromechanics of material microst...

在此基础上，利用有限元法对异质体材料微结构进行细观力学响应的数值计算，对于识别"材料结构弱点"，评估微裂纹的启裂、扩展，预测异质体材料微结构材料损伤后的材料性能，推演"微结构虚拟失效"行为具有重要的意义。

In this paper analysis technologies for these failures will be firstly introduced,which includes SEM/EDS,XPS, microsection,t hermal analysis(TGA/DSC/TMA),FT-IR , wetting balance test and so on.

本文首先介绍针对PCB在使用过程中的这些失效的分析技术，包括扫描电镜与能谱、光电子能谱、切片、热分析以及傅立叶红外光谱分析等。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。