行星

Nonlinear frequency response characteristics of a 2K-H planetary gearing system with multiple backlash has been calculated by using the developed analytical MDOF harmonic balance method, and has been compared with corresponding linear system. Again, influence of parameters on dynamic behavior is discussed.

通过采用本文推导的多自由度解析谐波平衡法求解2K—H行星齿轮机构的稳态响应，本文计算了间隙存在时行星齿轮系统的非线性动态特性，并就系统的非线性动态特性与线性系统的对比以及参数对行星齿轮系统动态特性的影响进行了分析。

The Brahe theory stated that all of the planets except the earth revolved around the sun, which in turn revolved around the earth. Brahe's assistant, German astronomer Johannes Kepler (1571-1630), used induction to analyze the data collected by Brahe over a twenty-year span. Kepler supported the heliocentric theory by proposing three laws of plant revolution.

在哥白尼思想的影响下，泰革(Tycho Brahe， 1546-1601)在观察的基础上，提出了哥白尼式的地心说︰地球以外的行星都绕太阳转；但太阳及其行星都绕地球转﹗泰革的助手、德国天文学家凯普勒(Johannes Kepler， 1571-1630)用归纳法分析泰革二十年积累的数据，提出了"行星运行三大定律"，支持了日心说。

Using the climatologically mean temperature and salinity from the Levitus data, the solutions with different modes of the gravity waves and planetary waves are analyzed.

利用Levitus气候平均温盐资料，分析了线性理论意义下南海的重力波及行星波的不同模态解，其一阶模的相速度分布与真实地形关系十分密切；通过行星波的临界频率的计算，从理论上描述了南海行星波动的特征。

Starting from the conditions of law of conservation of energy and angular momentum,how to deal with simple disposal of several physical equations of the planetary motion by applying the elementary mathematical equations is proposed.

从角动量和能量守恒定律出发，建立行星椭圆运动的轨道方程，导出行星运动时的各个物理量表达式，从而给出了一种以初等数学为基础的处理行星运动的简洁方法。

Cases, a satellite along the elliptic orbit orbiting satellite operation, the perigee from the planet center distance is a, well locations from the planet center distance b, if the satellite perigee rate is Va, the satellite apogee when the rate Vb how much?...

例、某卫星沿椭圆轨道绕行星运行，近地点离行星中心的距离是a，远地点离行星中心的距离为b，若卫星在近地点的速率为Va，则卫星在远地点时的速率Vb多少？。。。

Mayor said many more planets meeting scientists' requirements for habitability would be found, but that that the most significant short-term discovery would be that of a low-mass planet even more similar to Earth.

梅杰说，将有很多符合科学家对可居住性要求的行星被发现，但最为重大的短期发现为该与地球极为类似的小型行星的发现。581c约为地球的5倍重，但仍是目前发现的最小的外行星。

As a result,the tooth profile equations, helix angle equations,limit curve equations and induced normal curvature equations for worm and internal gear are obtained.

介绍了一种新型的传动机构超环面行星蜗杆传动，运用啮合理论的包络法建立了这种传动中行星轮与蜗杆、行星轮与内齿轮啮合的基本方程，进而得到了蜗杆和内齿轮的齿面方程、螺旋升角方程、界限曲线方程及诱导法曲率方程等。

Each of the eighteen planets was very different from one another; much like the planets of your solar system that vary in color, size, shape, vibrations held and orbit around the sun, so this was so for the eighteen planets that each had their own obit.

十八个行星中每一个都与彼此非常不同，就像你们太阳系中的行星，在色彩、尺寸、形态、掌握的振动及绕太阳的轨道都是不同的，而这十八个行星也如此，每一个都有他们自己的特征。

The Devourer halted when it encircled at the equator, kept the same obit motion with the planet, and sucked it from then on.

火山在海底和陆地密密麻麻地出现……当'轮胎'套到行星的赤道时，吞食者便停止了推进，以后，其相对于恒星的轨道运动始终与行星保持同步，一直把这颗行星含在口里。

Sun wheel and planetary gear are made of post-carburized hardened grinding teeth gear while internal gear is of quenching and tempering gear.

工作时太阳轮浮动，以便使其轮齿同时和三个行星轮均匀接触，达到均载目的；行星轮安装在行星架上，在绕自身轴线传动的同时，也随行星架一齐转动。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。