主要动力

To design it a cocording to the special 's made up of the mational magin use is to arrange the position of all the mational axle box and transrnit the power and the motion to all the main axle by the electrical machinery or the power pants .

三组合机床主轴箱设计，按专用要求进行设计，由通用零件组成，其主要作用是根据被加工零件的要求，安排各主轴位置并将动力和运动由电机或动力部件传给各主轴，使之得到要求的转速，机床主轴箱选用400*400，用中间传动轴带动主轴传动。

The paper includes:The author calculate the structures inner force and displacement of the free end , analyze the influence of the height and the value of pretress of cable by making use of ANSYS 9.0 soft, pose the concept of critical prestress,conclude the function relation between displacement of the free end, initial strain and the height of cable ,analyze the dynamic properity and point out that Newmark-β method should be adopted when we analyze the dynamic properity of the cable-stayed spatial structure with direct integral test to guarantee the contribution of high mode,finally conclude the functional relation among coefficient of earthquake inner force, initial strain and the height of cable, wish to get some helpful conclusion applied to cable-stayed spatial truss design.

本文系统介绍了斜拉空间桁架竖向地震反应的分析理论与方法、详细分析了斜拉空间桁架结构在静力和竖向地震作用下的受力性能，主要内容包括：利用通用有限元软件ANSYS9.0计算了斜拉空间桁架在静力和竖向地震作用下内力及自由端位移分布规律并得出地震内力系数与节间位置、预应力以及斜拉索高度之间的函数关系；详细分析了斜拉索中施加的预应力以及斜拉索高度的变化对于该种结构内力及自由端位移的影响并提出了斜拉空间桁架的临界预应变概念，进而得到了自由端位移与初始预应变以及斜拉索高度的函数关系，即：△=-(40h+2180)ε+9.8；分析了该种结构的动力性能，并指出：在时域内采用直接积分法计算该种结构的动力响应时，应该考虑采用不引起振幅率减小的Newmark-β法，以保证高阶模态响应的贡献仍然保留在响应中而不致于被忽略。

By reducing its dimensions through matrix conversion using the algorithm, the fault feature of condensator in the marine propulsion plant was extracted.

详细介绍了一种特征提取方法—主成分分析方法，运用该方法，经过矩阵变换、降低维数以提取故障信息的主要特征，实现了对船舶动力装置冷凝器的故障特征提取，为船舶动力装置冷凝器故障诊断及故障预报问题提供了一种有效可行的数据预处理方式

The power of the engine can be transmitted to driving axle directly by the electromagnetic force, and only part of power is converted from mechanical energy into electric energy, so the power losses in energy conversion can be reduced.

其特点是：发动机独立于车轮运转，可始终在高效区工作；发动机的动力主要通过电磁力直接传给驱动桥，仅有少部分动力经过机械能－电能－机械能的转换，降低了能量转换过程中的损失；且该系统兼备无级变速器的功能。

The main works in this paper are as follows:(1). In this thesis, a new method, continuous linearization model, is constructed for the non-linear dynamic systems. The precision Duhamel integration solution for the linearization equation is also given from the theory of linear differential equation. The calculating results show that the new method can improve the calculation precision greatly. In fact, the truncation error is not limited by this method, it can arrive the precision according to the requirement.

本文的主要工作有以下几个方面：(1)由于非线性项的存在，使得多数情况下难以得到非线性动力方程的解析解表达式，目前常使用数值积分方法来求解非线性动力学方程的解，但常规计算方法的计算精度不很理想，本文提出了含Taylor展开项中高阶余项的非线性动力方程的线性化数值计算方法，构造了瞬态线性化方程，给出了Duhamel积分的表达式。

This program primely adopt the tactics that weaken the action strength of opponent.four corners priority tactics、the most edacity tactics.at the beginning of the game and the middle of the game,the program adopt weaken the action strength of opponent,namely reduce the positionn of the opponent to play the chess mostly;at the end of the game we use the he most edacity tactics,namely to eat up the chess of the opponent to the best of one ' s abilities;the four corners priority tactics is run through the whole game,the four corners of the chessboard are stabilization corner,can ' t eated up by the opponent,so here is the most important position of player to contest,at the same time of prevent opponent to put the chess in the corners of the chessboard,we make great efforts to put the chess in the corners.

本文首先详细介绍了黑白棋的游戏规则，和一些基本的战术，然后将这些战术编写成代码存储在计算机中，使计算机在对弈过程中，可以灵活的运用这些战术。该程序主要运用的战术有削弱对手行动力战术、四角优先战术、最大贪吃战术。在游戏开局和中局时，程序采用削弱对手行动力战术，即尽量减少对手能够落子的位置；在游戏终局时则采用最大贪吃战术，即尽可能多的吃掉对手的棋子；而四角优先战术则是贯穿游戏的始终，棋盘的四角为稳定角，不会被对手吃掉，所以这里是兵家的必争之地，在阻止对手进角的同时，自己却又要努力的进角。

The main contents and contributions of the paper are summarized as follows:The matching technology between drum electromagnetic brake and vehicle is studied and the braking force distribution coefficient of the tractor and trailer is confirmed. According to the related standard, the mathematic model of the braking moment which the electromagnetic brake should provide has been ascertained using the matching theory. The matching technology of trailer train brake system has been introduced in the type selection and analysis of the brakes.

本文针对电磁制动器设计的关键技术进行研究，以建立电磁制动器集成设计平台为目标，主要开展了以下几个方面的研究内容：对汽车列车制动力匹配技术进行了研究，确定了牵引车和房车的制动力分配系数，依据相关标准运用制动器与整车性能相匹配的理论，建立了房车所需制动力矩的数学模型，用以对制动器进行选型设计，并给出了集成设计平台中整车匹配模块的算法流程图。

Besides consolidating the basic business of mechanical and electric products, we have been exploiting other sales channels in succession, including: hand tools, electric tools, motor fittings, automobile accessories, coated abrasives emery cloth, sand paper, etc.

经营的产品遍及世界主要国家和地区，而且出口产品结构不断优化，产品范围不断拓展，除了巩固机电产品的基础业务外，还陆续开发周边产品的市场和销售渠道，包括：手工具，电动工具，摩配、汽配、涂附磨具、工程机械及配件、动力及动力设备、橡胶输送带及平皮带等等。

The change of grain size was mainly caused by the fluvial power, which was related with the climate change in Weihe River watersheds.

沉积物的粒度变化主要是由河流水动力条件的变化造成的，而河流水动力条件又与渭河流域区域内的气候变化有关。

This thesis contains three parts: The first part focused on the simulation of the dynamic buckling for rod impacted by dynamic force and rigid body in axial direction, which is hinge joint and uniform cross section, basing on the ANSYS/LS-DYNA and PAMCRASH.

本文的研究工作主要有三部分组成：第一部分基于有限元程序ANSYS/LS-DYNA、PAMCRASH分别对两端铰接、等截面直杆在轴向动力载荷作用下的屈曲和刚性块轴向冲击作用下直杆的动力屈曲过程进行了数值模拟和分析。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。