查询词典 orbit calculation

According to the requirement of a minimum-fuel-consumption, a method of coplanar hit orbit optimization design for SGKW was studied. The dimensionless planar motion model of SGKW was founded, and the optimal control problem of minimum-fuel-consumption coplanar hit orbit was derived into two-point-boundary-value problem according to Pontryagin maximum principle.

针对燃料最省要求，研究了SGKW共面打击轨道优化设计方法，建立了SGKW的无量纲化平面运动模型，利用庞特里亚金极大值原理将燃料最省共面打击轨道的最优控制问题转化为两点边值问题。

Then through optimum thrust force acceleration governing equation obtained by Pontryagin maximum principle and the reasonable simplification, the optimum low thrust under the orbit elements is obtained. Finally, the optimum transfer orbit analytic solution is obtained by integrating the equations.

应用Pontryagin极大值原理建立航天器最优推力加速度的控制方程，对方程进行合理的简化，只考虑它们的一次项，忽略其它的高次项，从状态方程中得出小推力对轨道根数产生的摄动影响，然后分别对它们进行积分，从而得到最优转移轨道的解析解。

C,are because of the interaction between two stars that orbit each other 时说除了because 用法错误外,the prase "two stars that orbit each other" illogically suggests that there are two particular stars causing all the phenomena in question,rather than various sets of stars in various locations.

为什么这里用了that 定语从句就表示特指，而ING结构则没有该含义？——————————————that定语从句是限定性修饰，--ing是非限定性修饰。ing形式一般是表示伴随，伴随状态或者是结果，可以理解为非限制性定语从句。限制性的定语从句把原句的意思改变了。

A novel four-dimensiond hyperchaos system with only one nonlinear term is reported. The Lyapunov exponents spectrum, periodic orbit, quasi- periodic orbit, and the chaos and hyperchaos attractor of this system are obtained.

构造了只包含一个非线性项的四维超混沌系统，得到了系统的Lyapunov指数谱、周期轨道、拟周期轨道、混沌和超混沌吸引子。

This paper describes the effects of resupply,orbit maintenance and solaractivity on the orbit...

该文讨论了补给、轨道维持和太阳活动对轨道高度的影响，给出了空间站的最佳运行高度。

In this paper, the impacts of 4 types of LEO orbit parameters —argument of latitude, right ascension of ascending node, orbit height and inclination—on the distribution and number.

分析了对于单颗LEO卫星，掩星事件的分布和数量随着LEO 轨道参数包括轨道升交角距、升交点赤经、轨道高度和倾角而变化的规律，并得出了相应结论。

This paper firstly discusses the constellation rotation error of autonomous orbit determination of navigation satellites which only make use of crosslink ranging observation, then analyzes in depth the influence of tide perturbation on right ascension of the ascending node and autonomous orbit determination.

讨论了仅利用星间测距观测值进行导航卫星自主定轨时所遇到的星座整体旋转问题，分析了潮汐摄动对升交点赤经以及导航卫星自主定轨的影响。

Based on several typical autonomous on-orbit capture systems, the related key technologies and development status are presented, and the limitations of rigid on-orbit capture based on space manipulators are indicated.

结合典型的自主在轨捕获系统，阐述了自主在轨捕获关键技术及发展现状，并指出了目前基于空间机械臂的刚性在轨捕获模式的局限性。

The paper introduces the basic property of rotor vibration, the shape of the orbit in normal condition and the relation between faulty rotatory machine and its character of orbit.

论文介绍了转子振动的基本特性，正常情况下轴心轨迹的形状和在故障状态下轴心轨迹和旋转机械故障的对应关系。

Spend shunt-wound robot orgnaization in the light of the 6 freedom with drive of communication servo electric machinery, analysed its kinematic go against solution, undertook orbit plans, designed trends slippery model to change structural control is algorithmic, built the emulation model of robot spur track, achieved the expectation motion orbit to spur track dog.

针对以交流伺服电机驱动的六自由度并联机器人机构，分析了其运动学逆解，进行了轨迹规划，设计了动态滑模变结构控制算法，建立了机器人支路的仿真模型，完成了对支路的期望运动轨迹的跟踪。

We have limited budget let me know if you can do this competitively.

我们有限的预算让我知道如果你能做到这一点竞争力。

We don't know how other critters breathe--lizards, for example.

我们还不知道诸如蜥蜴之类的动物如何呼吸。