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The results show that,the plastic strain ranges of solder joints with underfill decrease distinctly and the thermal cycle lifetimes are approximately 20 times larger than that in the case without underfill.

研究表明，有底充胶倒装焊SnPb焊点的塑性应变范围比无底充胶时明显减小，热循环寿命可提高约20倍，充胶后的焊点高度对可靠性的影响变得不明显。

Elastic2plastic analysis mode. The effects of the welded joints with different strength matching (overmatch , evenmatch , undermatch) on

采用MARC软件的二维弹塑性分析模型，探讨了不同强度匹配的焊接接头试样在加载过程中裂尖场J

Thus, the purpose of this study explored the peak torque of six elite college female golf players (average ages=21.8) of the wrist joint of the dominated and undominated in 60°/s, 120°/s and 180°/s three different angular velocities and shoulder and elbow joints in 60°/s, 180°/s and 300°/s three different angular velocities. SPSS 10.0 for Windows, Paired-Samples t test analysis of the isokinetic strength of college golf players' dominated or undominated hand.

因此本研究目的为探讨国内6名优秀大专女子高尔夫选手（平均年龄21.8岁）其惯用手和非惯用手之腕关节在60°/s、120°/s和180°/s三个不同角速度下和肘关节、肩关节在60°/s、180°/s和300°/s三个不同角速度下所分别产生的峰值转矩值，且以SPSS 10.0软体，进行成对样本t考验(α=。05)检验优秀大专女子高尔夫选手惯用手及非惯用手之等速肌力差异，藉此来了解两者角色的重要性。

On the base of probabilistic and statistics results of joints and cracks, the Author modifies Block Theory. The sliding probability of Key Block is I A RSTR A CT F2 ? 5.It is put up forward that GM(l,1) Model to predict Amount of rainfall, and Markov Chain to modifY GM( 1,1 )predicting result, and then a theoretical predicting Model of amount of rainfall is firstly built. This model is applied in a situ example. It is proved that the model is very useful to predict amount of rainfall ,when ordinal array of Amount of rainfall changes in unexact index rule.

首次将节理裂隙视为有限长，借助有关岩体节理裂隙概率统计研究成果，对块体理论进行修正，确定了关键块体变为滑动块体概率计算公式为 5、本文提出采用GM（1，1）模型预测降雨量，而采用Markov链进行修正的方法，首次用该方法建立了大气降雨量预测的理论模型，并结合实例进行具体应用，解决了当降雨量的时间序列呈不严格的指数规律变化时，大气降雨量的预测问题。

Anatomical variation. Superiorly placed screws should be positioned away from unfused facet joints.

除需要提供特别强大的把持力的情况外，应避免损伤椎体前面的骨皮质。

My national resources consist of two joints of marijuana, millions of genitals, an unpublishable private literature that goes 1400 miles an hour, and twenty-five-thousand mental institutions.

我的民族资源包括两家大麻烟馆，几百万生殖器官，一部未出版的私人作品，它每小时传播一千四百迈，和两万五千个神经病院

The shell roof of steel structure on the site of Jinsha in Chengdu is the truss structure with unstiffen tubular joints ,and the chords of circumferential truss are irregular space curves.

成都金沙遗址大棚钢结构工程为圆钢管相贯节点桁架结构，环桁架弦杆为不规则空间曲线，通过采取弯管与胎具双重控制的方法，使环桁架尺寸得到精确控制；由于施工条件限制，采取了钢丝绳加固、结合已有结构辅助的方法将平面桁架移动到指定位置。

The results of full scale tests in this dissertation can reinforce international database of test and numerical analysis results for unstiffened tubular joints.

本文的试验研究为国际节点数据库增添了足尺节点试验数据资料，并新增了KKT型节点的试验数据。

The failure mode of unstiffened and stiffened joints in this paper is flexural failure ofthe chord face by the control of the joint parameters.

本论文研究的非加劲与加劲节点主要是基于弦杆表面屈服破坏模式，通过节点参数的控制使其成为主要破坏模式。

In the unstiffened overlapped CHS joints experiment, the wall thickness of brace member in non joint zone would be increased so as to calculate axial fotceb directly by the way of elastic method.

建议在后续的搭接节点试验中，可将非节点区域的腹杆壁厚加大，以便通过弹性方法直接反算杆件轴力。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。