参照系

It is positive to the contemporary construction of ethics in our country to review the ethical and political thought of Dong Zhongshu, with the reference to communitarianism's critique of liberalism.

以社群主义对自由主义的批判为参照系，对董仲舒的伦理政治思想进行审视，对于我国当代的道德建设，具有一定的积极意义。

Work ; reference system ; conservative force ; potential energy ; confinement

功； 参照系；保守力；势能；约束

Number of particles in a thermal bath is not a conserved quantity.

例如参照系的问题，实际上是相当奇怪的，而做。。。

Additional insight is gained by examining the elastic collision of equally massive particles in the center-of-mass frame of reference.

对质量相等的两质点的弹性碰撞更彻底的理解，可通过质心参照系而获得。

Firstly,life-cycle theory is still the general frame of reference and footstone .

主要的发现是：生命周期理论仍然是最基本的参照系和出发点

To answer that question, first of all to find a good frame of reference.

要回答这个问题，首先要找好参照系。

Although this experiment by the free-falling 30 meters to simulate the "high-speed" campaign, but is still in the inertial reference frame completed, the conclusion of "not slowing down" from a psychological point of Einstein's theory of relativity proved the first assumptions.

虽然这个实验通过30米的自由落体来模拟"高速"运动，但仍然是在惯性参照系中完成的，因此实验的结论"不会变慢"从心理学角度验证了爱因斯坦相对论的第一个假设。

It has been expounded and verified that AY can only be a fruitage of the process accumulation of the difference in physical elapsed-time caused by the different intrinsic-real velocity of physical clocks between the traveler and earth mainly in the two inertial phases,the Lorentz-Filtzgerald Contraction; which denies the SR's Key Gene and reveals:（1）The Absolute Reference System must objective-uniquely exist in the universe, and ①the Lorentz effect of whole universe relative to ARS all are IRPCE,②the time-space of ARS is isotropic and steady-homogeneous.

这是关于物理时空理论问题的第一个最重要的关键性奥秘！它彻底否定了KGS，揭示了"绝对参照系和相对于ARS的Lorentz-Filtzgerald效应客观存在的必然性"，表明狭义相对论是核心灵魂缺失了的片面性理论。

The laws of mechanics are the same in all inertial frames of reference. This is called Galilean relativity

在所有的惯性参照系中，力学定律都是一样的，这叫做伽利略相对性。

For the plane wave of laser without pulse shape, we derive the express of electron trajectory by the relative Lorentz and energy equations. Note that the orbit of electron becomes a "fat-8" in the average rest frame. For the plane wave of Gaussian laser, we may know that, through relative Hamilton-Jacobi equation, electrons are accelerated in the front of pulse and decelerated backward. Whereas for the non-plane wave of Gaussian laser, we solve the Lorentz and energy equations by fourth order Runge-Kutta method.

对于无脉冲形状的激光平面波是从考虑了相对论效应的Lorentz方程和能量方程出发，得到了电子的运动轨迹方程表达式，在纵向平均速度参照系下该电子的轨迹呈现"8"字形；对于高斯型单色激光平面波是从相对论Hamilton-Jacobi方程出发，得到激光平面波在脉冲前沿加速电子而脉冲后沿减速电子，电子能量增益为零；而对于高斯型单色激光非平面波是从拉格朗日运动方程和能量方程出发，通过四阶Runge-Kutta法数值求解，得到电子在纵向有质动力、横向电场作用下加速电子，最后在强大的横向有质动力作用下从脉冲侧面散射出去，可以获得很大能量增益本文得到了相应的电子瞬时动量解析表达式。

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。