失效

In order to know the cause of the accidents, an investigation is taken and the failure analysis is carried out for one broken drill pipe.

为了搞清钻杆断裂原因，对空气钻井过程中钻具断裂事故进行了调查研究，并对一根断裂钻杆进行了失效分析。

Analysis on failure cause and preventive measures of drill stem［M］.

石油钻柱失效分析及预防［M］。

It is very important for improving drilling rate, reducing drilling cost and safety drilling to carry out drill stem failure analysis and prevention.

开展油田钻柱失效分析与预防对提高钻井速度、降低钻井成本及井下安全钻进具有重要意义。

Of the invalidation of droit exclusiveness and market competition not completeness is among them the mainest reason.

所有权排他性的失效和市场竞争的不完全性就是其中最重要的原因。

Turn over virus expert introduction according to small drop, this worm was used more " hacker technology " method, can bring about the defence function be no longer in force that reduces poisonous software partly, register a watch through deleting, start, service, image is hijacked wait for means to destroy the software that reduce toxin to move normally.

据微点反病毒专家介绍，该蠕虫使用了较多的"黑客技术"手段，会导致部分杀毒软件的防御功能失效，并通过删除注册表、启动项、服务、映像劫持等方式来破坏杀毒软件正常运行。

Individual protection, provides with the correct use protection thing, including respirator, glove, ear plug and so on, and attention when expiration replaces immediately.

个人防护，提供和正确使用防护用品，包括防毒口罩、手套、耳塞等，并注意在失效时立即更换。

It was shown that excessive cutting speeds cause a rapid failure of cutting edge; thus, the tool can be declared to have a short life.

过高的切削速度会使切削刃快速失效；这样，就意味着刀具的寿命不长。

Due to its good effect in the reservation of information of signal abrupt change, mathematical morphology is often applied in the detection and location of short-term power quality disturbance, however, there is still a defect of invalid detection existing in partial detection methods based on mathematical morphology while some zero-crossing disturbances are detected. In this paper three mathematical morphology based disturbance detection and location methods, i.e., the method based on first-order derivation and morphological gradient, the method based on morphological gradient and soft threshold processing and the method based on dq decomposition and top-hat transform, are analyzed, that is, by means of simulation the adaptability of these methods in the analysis on the signals of voltage sag, voltage swell and electromagnetic transient oscillation is compared.

数学形态学因其在保留信号突变点信息方面有很好的效果，因此常用于短时电能质量扰动的检测和定位，但基于数学形态学的部分方法仍存在对某些过零点扰动检测失效的缺点，文章分析了3种基于数学形态学的扰动检测和定位方法，即基于1阶求导和形态梯度的方法、基于形态梯度和软阈值处理的方法、基于dq分解和高帽变换的方法，通过仿真比较了3种方法在分析电压暂降、电压暂升、电磁暂态振荡等信号方面的适应性，结果发现基于dq分解和高帽变换的方法在检测过零点扰动时具有很好的效果，因此选取这种方法对实测扰动数据进行了检测和定位分析。

The effects of surface electroplate pure copper on oxidation failure of lead frame copper alloys for IC package were investigated.

研究了在铜合金表面电镀纯铜层保护膜对铜合金引线框架氧化失效的影响。

The failure analysis of this article gets lots of subjects and theoretics involved, such as electrotechnics, mechanics, materials science, reliability theory and electric contact theory.

本文中的中间继电器失效分析是涉及电工学、机械学、材料学等多学科，可靠性理论、电接触理论等多种理论的复杂研究内容。

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。