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This method can get high precision and is very fitful of real-time implementation.

该方法具有补偿精度高、便于实时实现等特点。

The modal tests of PCB and PCB assembly (free boundary condition and fixed boundary condition) were carried out. The equivalent elastic modulus and damping parameters of PCB can be gained, and the fixed boundary condition of finite element model was also determined. These will help to the following work.Second, drop impact tests of three different heights were carried out. Strains and acceleration responses of PCB were measured. Failed BGA packages of different test conditions were dyeing, and cross section analysis of failed solder joints was conducted.

针对JEDEC标准试件的局限性，提出了设计便于统计学研究焊点可靠性的试验试件的构想，利用有限元模态分析方法确定并验证了用圆形PCB组件替代JEDEC标准试件的可行性；通过一系列模态试验和有限元模态分析，确定了圆形PCB组件的相关试验参数，这不仅为跌落碰撞下PCB组件有限元模拟确定了较为合理准确的有限元模型，而且为正确地评价跌落碰撞下PCB组件的可靠性问题奠定了基础。2。

The modal tests of PCB and PCB assembly (free boundary condition and fixed boundary condition) were carried out. The equivalent elastic modulus and damping parameters of PCB can be gained, and the fixed boundary condition of finite element model was also determined. These will help to the following work. Second, drop impact tests of three different heights were carried out. Strains and acceleration responses of PCB were measured. Failed BGA packages of different test conditions were dyeing, and cross section analysis of failed solder joints was conducted. It was found in our drop tests that the root cause of lead-free solder joints under drop impact was the combined effect of mechanical shock and PCB bending vibration.

针对JEDEC标准试件的局限性，提出了设计便于统计学研究焊点可靠性的试验试件的构想，利用有限元模态分析方法确定并验证了用圆形PCB组件替代JEDEC标准试件的可行性；通过一系列模态试验和有限元模态分析，确定了圆形PCB组件的相关试验参数，这不仅为跌落碰撞下PCB组件有限元模拟确定了较为合理准确的有限元模型，而且为正确地评价跌落碰撞下PCB组件的可靠性问题奠定了基础。

Yet there is also plenty of space for individual flair and imagination.

然而， 也有大量的空间，便于个人洞察力和想象力。

Design accord with API 6A Norm; Body of valve with valve lids, Flashboard with valve set according to needs adopt metal with metal seal up or nonmetal seal up, Valve rod and valve lid between with fall seal up convenient for valve bring press replacing valve stem packing, Dense cover built-up welding hard alloy,Endures cauterization, Endures impact.

设计符合 API 6A 规范；阀体与阀盖、闸板与阀座根据需要采用金属与金属密封或非金属密封，阀杆和阀盖间设有倒密封便于阀的带压更换阀杆填料，密封面堆焊硬质合金，耐腐蚀、耐冲击。

Judging by the kind of discrepancy and the feature onpeasants'consumptionability and content ,the contemporary Chinese peasants are dividede in to 5stratumgroups,for instance:flaunty consumption stratum ,comparision consumption stratum,practical consumption stratum consumption stratum ,poor consumption etc

从社会学的视角出发，对当代中国农民生活消费的现状与特点进行研究，探讨当今中国农村社会中的消费分层现象，既便于我们更好地了解农村社会内部中各社会群体之间的关系，也更有利于我们对当代中国社会阶层结构的基本建构和特征进行充分的了解和把握，从而为采取一定的措施促进农村社会的变迁与发展提供积极的指导。

First, choose the hand you often use so that you can apply it flexibly.

首先，选择你经常使用的手，这样更便于你灵活地运用。

The architecture of this system is very reasonable. It can split the application into business module, application controlling module and data displaying module efficiently, and improve flexility of the application. It is also convenient for integrate, maintain and upgrade.

本系统的体系结构设计较为合理，可以有效地将业务逻辑、应用程序控制和数据显示功能模块区分开来，以提高应用程序的柔韧性，使整个系统的开发易于集成、便于维护升级。

A practical risk model is derived from SPM to optimize flight path in real time.

为了便于实时计算，推导了实用的危险性模型。

His idea is to mine the words on blogs and other unstructured online content, to extract from them headings, categories and names that could then create an alternative set of tags -- an index of sorts -- that could help readers find Sell Flip-up Calculator related articles both from the same blog and elsewhere.

他的想法是，挖掘博客和其他网上内容中的文字，从中提取出标题、类别和名称用来创造一套替代的标签，即一套类别索引，这样可以便于读者在同一个博客或网上其他地方查找相关的文章。

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在，'歼灭战perfuming自己与胡努特，那麼，他来到和SAT 。