查询词典 momentum

If a body is in the absence of any external torque, the angular momentum of the body is a constant. This is known as law of conservation of angular momentum.

如果物体所受的合外力矩等于零，或者不受外力矩的作用，物体的角动量保持不变，这个结论叫做角动量守恒定律。

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。

Vector nature of angular momentum, precession, conservation of vector angular momentum (its transfer between parts of a system), nutation.

角动量的矢量特性，进动，角动量守恒(它在系统内部之间的转移)，章动。

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 bland sameness of space is at the root of both momentum conservation and angular-momentum conservation.

平淡无奇的空间一致性，既是动量守恒的根本，又是角动量守恒的根本。

For conservation of momentum, the atom must recoil with a momentum of this magnitude in the opposite direction.

因为动量守恒，原子必然以这样大小的动量向相反方向反冲。

Week 3 Momentum theorem, conservation law of momentum and its application, work of variable force, work of conservative force, potential energy.

第3周 动量定理动量守恒定律及应用；变力的功、保守力的功、势能。

Aiming at bottom roof caving and support impact problems induced with abrupt large scale caving upper roof in face 21303 of Daliuta mine, this paper put forward the motion parameter at roof caving and calculation formula of roof shear breaking force with the help of theorem of momentum, theorem of moment of momentum and D' Alembert principle. Roof caving process was simulated by Ansys Ls-DYNA program, and maxim impact force was got. The theoretical research outcomes in the paper were applied in face 21303 of Daliuta mine, and were accordant with actual observing status of roof caving process.

针对神东煤炭公司大柳塔煤矿活井21303综采工作面，上层采空区顶板突然大规模垮落对下层顶板及支架的突然冲击问题，文章采用动量定理、动量矩定理、达朗伯原理推出了顶板垮落瞬间的运动量及顶板切顶垮落所需要的剪力值计算公式，用ANSYS LS-DYNA程序对顶板垮落过程进行了数值计算，得到了最大冲击力，在大柳塔煤矿活井21303综采工作面对顶板垮落特征进行了实际观测和理论成果验证。

We also find that among the three investment strategies we discussed – the momentum strategy, buying the top or the bottom decile portfolio of funds, adopting the momentum strategy gets a better Sharpe ratio if the emerging market, energy, and mineral funds are not considered. For the portfolio of emerging market, energy, and mineral funds, it is with better performance for the strategies of buying the top or the bottom decile portfolio of funds.

最后，以Sharpe ratio为比较各投资策略在各投资分类的基准，采取动能策略操作基金，在移除新兴、能源、矿业基金之投资组合中有较高的报酬；又以买入形成期表现最好及买入形成期表现最差的基金为操作策略时，在新兴、能源、矿业基金这一分类出现较佳之绩效。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。