查询词典 nutation

Simulation and test prove that this method can improve nutation stability caused by gyroscopic effects effectively.

仿真和实验结果表明，采用这种基于转速的增益预调交叉反馈的控制算法，能够有效地抑制磁悬浮飞轮转子陀螺效应所导致的章动失稳，所设计的磁悬浮飞轮原理样机能够稳定运行在其额定转速30000r／min。

The increasing accuracy of modern observations requires to take into account its influence on the nutation amplitudes at the level of a few microarcseconds.

随着观测和计算精度的提高，地球动力学扁率值的不一致将影响章动振幅的计算。

The reasonable thinning is very significant in theory and practice to improve the nutation space of canopy and conditions of water and nutrition underground, to guarantee individual and colony development and to improve forest community biomass and productivity.

合理的抚育间伐对改善森林林冠层的营养空间以及地下水肥的供应条件，保证林木个体和群体生长，充分发挥森林群落的生物量和生产力具有重要的理论和实践意义。

Small lunar explorer ; Active nutation control ; Fuzzy control

小型月球探测器；主动章动控制；模糊控制

Her main scientific interests are comparative planetary interiors and rotation, as well as modeling tides and nutation of the Earth, Mars, Mercury and Venus.

她的主要研究专长在于各行星的内部结构和自转的比较。亦精于地球、火星、水星和金星的潮汐作用和地轴的转动的计算。

A new measurement method for nutation cycle has been put forward with the measuring theory of non contact vertical target.

提出了一种新的测量弹丸初始弹道章动周期的方法，采用非接触式光学立靶测量原理测量弹丸章动周期测量弹丸通过立靶的瞬时位置，计算出弹丸章动角，根据多组章动角数据获得弹丸的章动周期并提出了实现这一目标的测量系统的组成与功能，对系统的攻角测量准确度进行了分析

Precession and nutation of top and gyrosscope is discussed by elementary method,equations of motion are solved using simplified models, and an elementary analysis is made.

用初等方法讨论了陀螺与陀螺仪的进动及章动，用简化模型求解了运动方程，并给出了它们的初等分析。

The period and amplitude produced by space free nutation in data of latitude and time observation were 208 mean...

011±0。"003和P2，2=209平太阳日、A2=0："022±0。"004；由此得地面摆动的周期、振幅分别为P0，1=23h 57m01s、v1=2。"26×10-5和P0，2=23h57m04s、v2=4。

In order to improve the amplitudes of the rigid Earth nutation series, it become necessary to revise the IAU 1976 value of the general precession in longitude.

非刚体地球章动的转换函数中所采用的简正模频率和常数都直接或间接地依赖地球动力学扁率值。

The possible differential rotation among the layers of the Earth interior and its contribution to nutation, as well as the displacement profile interior, are studied, which provides a new method to study the differential rotation of the Earth cores.

讨论了地球内部可能的较差转动对章动的贡献以及地球内部形变场剖面，特别是核幔边界附近的低阶形变场的非线性特性，为研究较差转动提供了除地震学之外的另一种新的可能途径。

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％。