运动学的

The spatial and temporal evolution of simulated velocity and cloud microphysics fields show that the coupling of vertical velocity and vapor distribution is a kinematics criterion for vapor condensation and freezing that result in snow.

模拟的 运动场和云微物理量场的时空演变表明，垂直运动场与水汽场的耦合是水汽凝结和冻结成雪的运动学条件；气旋性涡柱和上升运动及深厚湿舌的耦合是暴雪形成的一种重要动力机制。

By using the theorem of moment of momentum with respect to the mass center, the ship motion is devided into translation and rotation respect to the ship mass center, and the six-degree-freedom nonlinear equation can be deduced based on the exactly analysing the force acting on the ship.

基於刚体运动学理论，将船舶在波浪中的运动分解为平动和绕质心的转动，在分析了船舶受力情况的基础上，运用质点系相对於质心的动量矩定理和Newton第二运动定律建立了船舶的六自由度运动的非线性藕合方程。

In order to find out the biomechanics feature of three joints muscles o f lower limbs by using new skates in push-off phase of speed skating, this article combines the kinetic data obtained by Cybex-Norm and kinematic data obtained by tridimensional analytics by employing the Newton interpolation polynomial f or the first time, draws the curve of muscles moment of two elite female speed- skaters in push-off phase of speed skating, and analyzes the change feature of muscle strength, so as to find out the reasons of less power output and provide reference for training and the improvement of sports results.

摘 要：为了找出使用新冰刀后蹬冰时下肢三关节肌群的生物力学特性，首次利用数值计算中的牛顿插值法，将等动测试获得的动力学数据和三维立体解析获得的运动学数据结合，绘出两名优秀女子速滑运动员实际蹬冰时肌群力矩的变化曲线，并分析肌力变化特点，找出两人做功明显不足的原因，为指导训练和提高运动成绩提供定量依据。

On the basis of introduction of kinematic analysis methods, the paper founds the stationary coordinate system and the wheel coordinate system respectively. Meanwhile, the kinematic constraint equations of the standard centered orientable wheel is founded on the assumption that there is no slippage in normal direction and pure rolling in tangential direction of the wheels.

在简要介绍常规的运动学分析方法的基础上，建立了相关的惯性坐标系和滚轮坐标系，并根据滚轮在法向无滑动、切向作纯滚动的假设建立了中心定位轮的运动约束方程。

The close loop equation is used for the positional posture analysis of the output piece of space 3-RPS parallel mechanism and the forward displacement of the mechanism is educed to acquire the positional posture of output piece.

应用闭合回路方程法对空间3-RPS并联机构的输出件的位姿进行分析，推导出该机构的运动学正解，获得了输出件的位姿，给出该机构位姿分析的数值仿真实例。

Legs' and joint-clearances' effects were analyzed to improve the accuracy of 3-TPT parallel machine tool. Every link in the platform was treated as a joint-link train. The mapping from the errors of legs and joint-clearances to the accuracy of terminal was achieved by using matrix method with the differential of kinematic function.

为提高3-TPT型并联机床的运动精度，解决杆长误差和铰链间隙误差的影响问题，将3-TPT型并联机床的各条支链作为假想的单开链，利用矩阵法结合从运动学方程微分得到的结论，推导出杆长误差和铰链间隙误差与终端动平台位置误差的映射关系。

The radial rectilinear stretching motion is firstly analysed, and its condition is deduced. Then two planetary gear mechanisms are assembled to realize the motion. In addition, the kinematics and dynamics analysis of arm mechanism is done, which provide the theoretic basis for the selection of servomotor and for holding the good dynamics and static performance of the clean robot.

首先对其末端执行器的径向直线伸缩运动展开分析，得出了实现该运动的必要条件，并采用两组行星轮系与连杆机构的组合形式来实现末端执行器的运动，此外还对该机构进行了运动学和动力学分析，为电机的选择以及控制净化机器人的动态性能和静态特性提供理论基础。

In view of the key problem of subminiature underwater robots, structural improving,control algorithm and underwater experiment is studied. They can be described as follow: Firstly, the subminiature underwater robot should be compact in size and low cost, for which, it is difficult for us to control its balance. So that, a new kind of piston--style ups and downs system was invented, which can keep the underwater robot horizontally suspended in the water without driving force.

中文摘要本文针对超小型水下机器人在运动中存在的问题，设计了一种新的超小型水下机器人的沉浮结构形式，着重研究了其运动学动力学性能、探讨了相应控制算法、进行了水下试验，具体研究内容如下：首先，超小型水下机器人由于体积小重量轻，在水中沉浮时悬停平衡控制困难，为此进行了一种新的活塞式沉浮系统设计，该系统使水下机器人能够在无动力驱动的情况下，使其呈水平状态稳定悬浮在水中。

To solve the problem of transversal turnover of the paddy field boat during the cultivation operation, combining the method of theoretical calculation with paddy field test, the kinetic and dynamic characteristics were analyzed and the mathematical model was established according to movement stability in this paper.

为了解决机滚船犁耕作业转弯时的横向倾翻问题，采用理论计算与水田试验相结合的方法，通过对机滚船犁耕作业时的运动学和动力学分析，从稳定性角度出发，建立数学模型。经过分析和计算，求出了机滚船犁耕作业时最小转弯半径的关系表达式，将其运用到1BG-0.9型带铧式犁机滚船上，计算出了该机滚船的最小转弯半径。

On the basis of Kinematic and dynamic analysis of winch system of logging truck, the mathematic model of both winch system and hydraulic system can be built.

本文通过对测井车卷绕系统的运动学和动力学的分析，在此基础上建立了卷绕系统和液压系统的数学模型，对影响系统性能的干扰进行了理论分析，将其等效为随机干扰和阶跃干扰，研究了参数时变，非线性等特点对控制系统性能的影响。

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。