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Study is aimed at box threads of Φ177.8mm drill collar to analyze and calculate drill collar box thread with different stress-relief grooves using finite element method, the stress concentration of thread end of 3 types of box threads is gained under same boundary condition and load.

以177.8mm钻铤母螺纹接头作为研究对象，用有限元方法对加工有不同应力减轻槽的钻铤母螺纹接头进行了分析计算，得出了3种不同母螺纹结构在相同边界条件和载荷作用下螺纹消失端的应力集中情况。

By the example of greening landscape design of east ring road in ZhuanKou Development Area, this paper analyses the project by three aspects: plane, color and dimension composition of greening landscape and introduces the characteristics of load landscape in WuHan.

本文以沌口开发区东环路绿化景观设计为例从绿化景观的平面构成、色彩构成、立体构成三个方面对此方案进行了分析，论述了武汉市城市道路景观构成的特色，并就此论证武汉市道路绿化景观绿化设计要通过这三大构成的有机接合才能使其发挥最大的景观效益。

The vertical load on the underpinning-node resisted by shear capacity of bolt, new-old concrete interface and profiled bar fringe embedded in column. A formula calculating bearing capacity of the underpinning was advised, and the combined work was calculated by cooperate coefficient γ.

分析认为托换节点的竖向荷载由螺杆的抗剪承载力、新旧混凝土连接界面的抗剪能力和型钢翼缘卡入柱身产生的咬合力共同承担，由此给出了型钢对拉螺栓柱托换节点的抗剪承载力计算公式，式中通过综合作用系数γ考虑了3部分的共同作用和相互影响。

The effective output resistance is the parallel combination of the plate load resistor and the plate resistance of the tube.

有效输出电阻实际是屏阻和负载电阻的并联】。

The experimental results indicate that the CFRP and steel plate combination strengthening method can effectively improve the load capacity of RC beams, restrict the development of existing cracks andenhance section stiffness, and by using the U style steel plate hoop anchorage system, sudden debonding failures can be avoided.

试验结果表明：碳纤维与钢板复合加固钢筋混凝土梁能有效地提高截面承载力，约束裂缝的发展，提高刚度；加载点及端部采用的U型钢板箍较好地防止了梁中剥离破坏的发生。

To 32 proportions, the zinc base alloy +ABS engineering plastics material quality, the vehicle door may open, the ultra cruel wristwatch remote control, brings the compass, on the vehicle roof to be possible to load together the surfboard or the skin rowing, the limit movement ultra cruel equipment!

1比32比例，锌合金+ABS工程塑料材质，车门可打开，超酷手表型遥控器，带指南针，车顶上可装载一块冲浪板或者皮划艇，极限运动的超酷装备！

Therefore, the article takes the study in-depth of three-phase unbalanced load compensation for the balance of theory, hold a proposed compensation algorithm based dq transformation, and designs a system to improve the power grid with the function of three-phase unbalance compensation.

所以，文章在深入研究三相不平衡负荷的平衡化补偿原理的基础上，提出了基于dq变换的补偿算法，并设计了具有改善电网三相不平衡功能的补偿系统。

In this paper, compensation techniques of seismic simulation system are introduced primarily, including geometric cross coupling compensation, overturning movement compensation, off center load compensation and force balance compensation.

对振动台控制技术的台面补偿技术作了初步研究分析，其中包含几何交叉耦合补偿、倾覆力矩补偿、偏心负载补偿和力平衡补偿，并分析了它们的原理和电路实现原理框图。

Impact buckling which has few study findings relatively. So some viewpoints have not been consistent. Systematic study is made on dynamic buckling of axial compression member under impact load in this paper for that reasons.

动力屈曲问题由于时间参数的引入相比静力屈曲问题要复杂得多，特别是对冲击荷载作用下的动力屈曲问题尤甚，研究成果相对较少，对许多问题的认识尚未达成一致。

Second, dynamic buckling condition is erected after analysis of perfect axial compression member with different boundary conditions, by which dynamic buckling critical load and corresponding buckling modal are obtained. These indicate the difference between dynamic buckling and static one.

其次，通过对不同边界条件理想轴心受压构件进行分析，建立动力屈曲条件，获得了动力屈曲临界荷载及相应屈曲模态，表明了动力屈曲与静力屈曲的差异。

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。