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Considering enough first integrals,such as conservation of energy and angular momentum,the system is integrable by Liouville's theorem.

利用能量积分，根据惠特克定理对系统的动力学方程进行降阶，并根据旋转数给出系统作周期或准周期运动的判别条件。

Firstly, the development of the spherical robot is introduced and according to the knowledge of the research forepassed, the nonholonomy and the nonlinear controllability for a spherical robot based on the principle of angular momentum conservation are discussed with the differential geometric control theory.

首先介绍了球形机器人的发展状况，在了解前人研究领域的基础上，应用微分几何控制理论，对此角动量守恒的球形机器人的非完整性和非线性可控性进行了研究。

The law of conservation of angular momentum may be demonstrated with a gyroscope.

角动量守恒定律，可以用回转器来演示。

Based on the conservation principle of linear and angular momentum,the method derives the equations of the mass and mass center as well as inertia tensor of the new end-effector for the manipulator handling the unknown object.

1引言由于自由飞行空间机器人本体的质量随着载荷及燃料的消耗而发生变化，而目标的惯性参数往往是未知的，因此在运动控制时，必须进行参数辨识。

Since this space robot strictly abide by the rules of momentum conservation and angular momentum conservation, its dynamic equations exhibit a strong nonlinearity.

此类空间机器人系统严格遵守动量守恒和角动量守恒，所以其动力学方程表现出强烈的非线性性质。

Based on the common D-H modeling methods for ground robot and the conservation of momentum and conservation of angular momentum suitable for SR, continuous motion trajectory control modeling algorithm for SR is developed.

基于地面机器人常用的D-H建模方法和空间机器人满足的动量守恒和角动量守恒原理，提出了SR连续运动轨迹控制建模算法。

With a simple symmetrical electromagnetic field,the law of conservation of momentum and the law of conservation of angular momentum for electromagnetic field and charges system are investigated.

利用简单对称性的电磁场，讨论了场和电荷系统遵从的动量守恒、动量矩守恒定律

The tangent space and normal space of the robot motion curve is constructed by using Newton-Euler orthogonal method, which satisfies the restrictions of linear and angular momentum conservation of free-floating space robot system. An analytical expression of joint actuation torque in the floating state is given by using this method.

根据空间机器人自由漂浮状态时系统动量守恒的特点，采用Newton-Euler正交方法构建了满足系统动量守恒约束条件的空间机器人运动曲线法空间与切空间基底，并以此基础得到了自由飘浮状态下的空间机器人关节力矩的显式表达式。

In the teaching of central field, we should pay attention to turning the relative motion of two - body into one dimentuonal radial motion by introducing two physical concepts of reduced mass and effective potential energy, and we should also pay attention that the area law is the geometrical description of the conservation of angular momentum in the central field.

在有心力场教学中，应着重强调指出：通过引入折合质量和有效势能这两个物理量，把二体相对运动问题转化为单体沿径向的一维运动问题；以及面积定律是质心在有心力场中角动量守恒的几何描述。

However, the Big Bang does not explain many things, including the uneven distribution of matter that results in "voids" and "clumps," or the retrograde motion that must violate the Law of Conservation of Angular Momentum.

然而，大爆炸并不能解释许多事实，包括物质分配不均，结果造成一些"虚空"和"实体"；而且"逆行运动"必然违反角动量守恒定律。

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。