质心速度

用Matlab仿真分析了主球的质心速度和旋转角速度对其运动轨迹的影响，并提出了一些针对球手训练的建议。

The influence of the velocity of the centroid of the main ball and the angular velocity on its track has been studied by simulation with Matlab and some suggestions which are useful for training are put forwarded .

用Kane方法，分别推导了各关节的角速度、质心速度、角加速度、质心加速度、广义惯性力、广义主动力的递推表达式，最后得到了人体下肢的动力学方程。

With the Kane 's method , the paper calculated the functions of angular velocity , angular acceleration , mass-center velocity , mass-center acceleration , generalied active forces , generalized inertial forces , and finally got the dynamic equations of the human lower limbs .

两体问题的质心速度与一维完全弹性碰撞

The velocity of the center of mass and one-dimension perfect collision

将两体问题的质心速度公式应用于一维完全弹性碰撞问题，从而导出一系列有用的结果。

In this paper , we suggested a method to study the one-dimension perfect collision using the velocity for center of mass of two bodies .

采用简化模型，通过动量方程和动量矩方程，获得了球形杆弹撞击球形靶板后弹体质心速度和攻角的关系。

By momentum equation and momentum moment equation , the relation of centroid velocity and attack angle is obtained after spherical-nosed rod impacting at spherical target .

通过动力学特征分析，力值的大小与上下面人的各关节角、质心速度的变化一致。

But the speed of the upper is slower than that of the lower . Based on the analysis of the kinematic characteristics , the amount of the forece value is consistent with the changes of all joint angles and the center of gravity .

要避免含糊，这些定律所指的应当是质心的速度和加速度。

To remove the ambiguity , these laws should refer to the velocity and the acceleration of the center of mass .

在无外力时，质心的速度是常量。

The velocity of the center of mass is constant in the absence of external forces .

这表明，以质心运动速度为代表的常规计算在某些情况下是不保守的。

It shows that it is not conservative to use the velocity of the center of mass as representative to conduct conventional calculation under some conditions .

结果发现，以质心运动速度计算下游关心地点的最大浓度在某些情况下是不保守的，核素迁移快成份在安全评价中的作用也是不可忽视的。

It is found from the ratio that the results conventionally calculated by using the velocity of center of mass as a representative are not conservative under some conditions .

比较以上3种测量结果发现在下垫面无渗透时，即加入的盐液没有损失时，电解质脉冲法测量坡面薄层水流流速与质心运动速度及流量法测量结果基本是一致的。

Comparing results measured by these three methods showed that velocity of flow measured by electrolyte pulse method agree with those of other two methods while no permeating in the bottom or no losing of salt solute in the experimental process .

Cooper对质心定向运动速度的研究

A Research On The Motion Velocity In The Centre Of Mass For Cooper Pairs

作为刚体运动的例证，讨论了在冲力作用下台球的运动情形，计算了在不同的击打条件下，台球进入无滑滚动状态的绕质心转动的速度。

The frictionless impact of billiards due to impulsive force under different conditions is discussed regarded as an illustration of rigid body motion .

根据超导电流密度、穿透深度和超导临界磁场的关系，研究了超导电子对质心定向运动速度（远大于正常导体内的载流子定向运动速度）；

From the relations between the superconducting current density and the depth of penetration and critical magnet field , we get a conclusion that the velocity of the electron pars in the superconductor is more larger than that in the normal conductor .

在类感应电场力的作用下，束缚电子对质心定向运动速度由零增大到103-104ms-1，使超导电流的熵小于正常电流的熵。

Under the influence of the like induction electric field force , the velocity of the mass motion of the binding electron pairs increases from zero to 10 3-10 4 ms - 1 , making the entropy the of superconducting current less than the one of the normal current .

通过分析机器人的几何模型，得出机器人各个关节及杆件质心的位移、速度方程。

Analyzed the model of robot and got the equation of displacement and velocity of joints .