查询词典 nutation

The interpretation and selection for different values of the Earth dynamical flattening will have to be approached in the construction of the future nutation theory of a non-rigid Earth.

在建立非刚体地球章动理论中，如何解释地球动力学扁率值的差异，如何选取地球动力学扁率值，还有待进一步的研究。

Phenomena such as precession the slow roughly 25 000 year cycle of movement of the direction of the Earth's axis and nutation the continual "nodding" of the Earth's axis due mainly to tidal forces from the Sun and Moon all have to be taken into account when defining a Universal Reference frame.

现象，如进动，慢，大约25 000年的周期，对地球的轴的方向运动，章动，不断"点头"地球的轴心，这主要是由于来自太阳和月亮，所有潮汐力量要考虑到当定义一个通用参考框架。

The prolate body and the energy dissipation lead to the i nstability of the spinning. Two common control scheme was used to design the active nutation controller.

由于细长体和能量耗散的存在，导致了自旋运动的发散—章动运动，为此采用两种工程上常用的喷气主动控制方法设计了主动章动控制器。

In view of the effective results about the long term disaster weather prediction based on the vari- ation of the earth rotation in the recent 10 years,the authors try to explore the deep reason of major disaster weather with the relationship among the earth nutation,rotation and atmospheric change.

鉴于近10多年来运用地球转速的变化做长期灾害天气预测取得的较好效果，试图运用地球的章动、地球转速和大气变化的关系，探索重大灾害天气的深层次原因。

For the disadvantage of wasting fuel, a fuzzy active nutation control scheme was proposed. The three schemes were all given the numerical simulation result.

针对两种方法消耗燃料比较大的缺点，提出了一种模糊喷气主动章动控制方法

Keywords: Earth nutation; electro-magnetic coupling; differential rotation; generalized surface spherical harmonics; Mars

中文关键词：地球章动；电磁耦合；较差转动；广义球函数；火星

In the flying course of the low-speed revolving rocket, deflective flow willappear due to the nutation effect, the method of calculating the deflective flow based on the exterior ballistics is given, and the simulation result with some examples is also stated.

低速旋转火箭弹在飞行过程中，由于章动因素的影响产生偏流。本文根据外弹道学理论给出偏流的计算方法，并结合实例给出仿真模拟结果，通过计算分析偏流对多管火箭弹飞行轨迹的影响

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。