查询词典 precession

If you have a spinning gyroscope and you try to rotate its spin axis, the gyroscope will instead try to rotate about an axis at right angles to your force axis; this is precession.

如果您有纺纱陀螺仪和您尝试旋转，其旋转轴，陀螺反而会尝试旋转约一轴成直角，以您的力量轴；这是岁差。

Hence the full moon cycle can be defined such that the lunar precession cycle is the beat period of the full moon cycle and sidereal year.

因此，满月周期可以和月球的进动周期整合，定义出满月周期和恒星年的关系。详见月球进动。这句应该也有问题。

A slow westward shift of the equinoxes along the plane of the ecliptic , resulting from precession of Earth s axis of rotation , and causing the equinoxes to occur earlier each sidereal year .

分点岁差：指二分点沿着黄道平面向西的缓慢移动，它由地球中轴旋转的岁差而造成，并能导致二分点每个恒星年都提早出现。

In the method, the orbit of targets and the radar coordinates and parameters are put to calculate attitude and dynamic parameters of targets in line of sight. And then the dynamic data are generated according to the electromagnetic modulation model of the movement of targets including motion at high speed, spin, precession on electromagnetic wave.

该方法首先确定目标的轨道和雷达的布站坐标及工作模式，而后计算目标在雷达观测视线(line of sight， LOS)方向上的姿态和运动参数，最后根据空间目标高速运动、自旋、进动等在电磁波上调制的数学模型生成动态测量数据。

China Guiyang Xintian OETECH Co Ltd - precession metrical instrument, optical instrument, three-dimensional measurer, projector, toolmaker's microscope, video measurer, end instrument, angle instrument, physical-analytical instrument, raster sensor, data-display meter

贵阳新天光电科技有限公司-投影仪，工具显微镜，测长仪器，光学计，视频测量仪，三坐标测量机，光栅数显，角度仪器，验钢镜，刀具检测仪

The tropical year is a phenomenon of the precession of the equinoxes in astronomy.

太阳年是天文学里的岁差现象。

The behavior of Gyrover is based on the principle of gyroscopic precession, as exhibited in the stability of a rolling wheel.

行为gyrover的原则的基础上的陀螺岁差，作为展示，在稳定的滚轮。

The data of measured period of 1771 pulsars have been analyzed and detected, and 81 of them were influenced by the effect of lunisolar precession in their period measurement precision.

在对1771颗脉冲星测量周期的分析和检测中，有81颗脉冲星的测量周期在它们的测量精度范围内受到日月岁差效应的影响。

For those who haven't heard the word, precession is when an object with a nonspherical shape wobbles around its rotation axis.

如果你还不了解&进动&这个词，进动指的是物体绕它的旋转轴有非球形的摆动。

The larger subharmonic component will be introduced into the system after the instability of system periodic motions, the motion of systems will be nonsynchronous precession and the amplitude of alternate stress in the rotor shaft is high. The long-term existence of instability will directly threaten the safe running of the rotor systems. Research on the influence of the change of system parameters on the system dynamical behaviors, the stability of system periodic solutions with the change of system rotational speed and the system motion after instability will have the theoretical and engineering-oriented significance for the long-term safe running of large-scale rotating machinery.

转子系统失稳后会产生较大的低频振动分量，系统运动出现非协调进动，系统转轴中会产生幅值很大的交变应力，转子失稳状态的存在直接影响系统的安全运行，因此研究转子系统自身参数的变化对系统动力稳定性的影响，研究系统周期解随工作转速的变化情况及其失稳后的运动规律，对大型旋转机械的安全稳定运行具有重要的理论意义和工程实用价值。

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。