着重讨论登月轨道计算的自动寻优设计。
This paper emphasizingly discusses the design of ant. omatical optimizing trajectory calculation of lunar prober.
本文阐述了地球同步卫星的特征、用途及其轨道计算。
This paper deals with the characteristic, the USES and the calculation of orbits of earth synchronous satellite.
可直接用于制导，实时轨道计算，卫星轨道短期预报等。
It may be used in guidance, onboard orbit computation, and short term forecast of satellite orbit.
轨道计算主要用来模拟飞行器的飞行过程，前提是建立动力学模型。
The main function of orbit calculation is to simulate the flight procedure of spacecraft, before that, the dynamics model of orbit must be established.
我准备将原子轨道组合起来，进行分子轨道计算，这个过程还需添加一些系数。
I am going to sum up the atomic orbitals that go into the molecular orbital, and they are going to have some coefficients.
该方法可为精确轨道计算提供较好的初值，大大缩短了轨道精确计算所需的时间。
This method can also provide good initial guess value for precise orbital calculation and greatly reduce the time for calculating precise transfer trajectories.
该术语也用于描述观测的某天体(小行星或彗星)的位置与轨道计算值之间的差别。
It is also used for the difference between the observed position of an object (minor planet or comet) and the position calculated from an orbit.
该方法的优点是无需进行轨道计算，仅用解析表达式即可快速准确地设计出满足覆盖要求的轨道。
The advantage of the method is that the orbit to meet the needs of coverage can be quickly and exactly designed only by the above analytic expression without orbit computation.
用人造地球卫星轨道计算的测速定轨方法，去拟合火箭飞行弹道的自由段，取得了比较满意的结果。
The result is satisfactory by using a method of the artificial earth satellite orbit determination from range rate observations to fit the free-flight trajectory of rocket.
在空间作战仿真虚拟环境中，空间目标-卫星及空间碎片数量庞大，其轨道计算直接影响着仿真速度。
In space operational simulation virtual environment, space targets-satellites and space debris are in large quantities, and their orbits calculation affect the simulation speed directly.
所以，人造卫星的轨道计算数据会很快就过期，如果你要准确计算它们的轨道，你就必须即使更新它们。
Because of this, a set of satellite orbital elements very rapidly "ages" and for accurate predictions 'must' be updated every few days.
根据轨道计算，8字曲线也有可能为其它星球表面的观察者显现，但是对某些世界来说，太阳路径的形状不会描绘出8字。
Analemmas may also appear for observers on the surfaces of other planets, based on orbital calculations, but for some worlds the shape of the sun's path wouldn't trace a figure eight.
第三章通过数值法分析了各项轨道摄动和参数误差等因素的对轨道计算的影响，给出了精确的月球探测器轨道计算数学模型。
Chapter 3 analyzes numerically the effects for orbit calculation caused by orbital perturbation, parameter error and so on. A precise mathematical model of orbit calculation is given.
并将其应用于高度为800公里ERS-1 卫星的轨道计算，结果表明：修订后的J77模型比其它大气模型在测轨精度上有明显改善。
The new version of J77 is found to be obviously advantageous to the precision orbit determination of ERS-1, which is at the height of 800km, compared with other atmospheric models.
在B3LYP/6-311G计算所得的平衡几何构型基础上，分别根据静电势和分子轨道计算研究了分子中-NH2和-N（CH3）2的亲核性，并与偏二甲基肼和卤代烃反应的实验结果进行了对比分析。
On the basis of equilibrated geometrical structure obtained by B3LYP/6-311G method, the nucleophilicity of-N(CH3)2 and-NH2 groups are investigated by electrostatic potential and MO calculations.
知道了地球轨道的宽度，视差偏移可以让天文学家计算距离。
Knowing the width of Earth's orbit, the parallax shift lets astronomers calculate the distance.
一旦连接到轨道上，汽车将由系统提供电力，由中央计算机控制。
Once attached to the rail, the car will become electrically powered from the system, and control of the vehicle will pass to a central computer.
我们还可以在这里计算出该轨道的能量，该能量等于里德堡常数。
We can also figure out the energy of this orbital here, and the energy is equal to the Rydberg constant.
当时的电脑主要是用来科学计算的，例如计算火箭的轨道。
Back then computers were mostly for scientific computation, like calculating the orbits of rockets.
如果所有这些成分都存在，那么天文学家们可以使用新的方法来计算测量的大小和地球和月球轨道的恒星的质量直接，研究人员说。
If all those ingredients are present, then astronomers can use the new method to calculate the star's mass directly by measuring the sizes and orbits of the planet and moon, researchers said.
布鲁克斯：没有这样想过。当时的电脑主要是用来科学计算的，例如计算火箭的轨道。
Brooks: Oh, no. Back then computers were mostly for scientific computation, like calculating the orbits of rockets.
一般的GPS系统在接收到几个轨道已知的卫星所发出的信号后就开始计算自己的位置。
Normal GPS devices calculate their own location from the time it takes to receive signals from several satellites with known orbits.
比方说，如果不同望远镜上的时钟走得不一致，那么某一确切时刻小行星坐标的测量将互相冲突，导致轨道推测计算错误。
If the clocks on the different telescopes didn't agree precisely, for example, then their calculations of the asteroid's location at a given moment would conflict, distorting his trajectory.
在寻找天王星轨道的差异时，英国人约翰·考奇·亚当斯和法国人于尔班·勒威耶分别独立计算着这个未知世界的质量和位置。
By looking for discrepancies in Uranus's orbit, Englishman John Couch Adams and Frenchman Urbain Le Verrier each independently calculated the unseen world's mass and position.
如果知道R，就能，计算轨道里的速度。
当科学家计划将一颗人造卫星送上月球轨道时，这种计算能力便显得尤为重要。
This ability is especially useful when scientists are, say, planning to put a satellite in orbit or charting the course of the moon.
一个叫做“哨兵”的计算机程序可以计算出每个近地天体未来40年的轨道。
A computer program called Sentry projects each NEO's orbit for 100 years.
这一发现源自显示未来数十亿年中行星轨道会如何演变的模拟计算。
The finding comes from simulations to show how orbits of planets might evolve billions of years into the future.
这个新模型追踪了海王星轨道外数无数个微小物体的运行轨迹，它可以帮助天文学家计算出其他星系尘埃盘中行星的特性。
The new model, which tracks thousands of tiny particles beyond the orbit of Neptune, could help astronomers work out the properties of planets in other stars' dust disks.
这个新模型追踪了海王星轨道外数无数个微小物体的运行轨迹，它可以帮助天文学家计算出其他星系尘埃盘中行星的特性。
The new model, which tracks thousands of tiny particles beyond the orbit of Neptune, could help astronomers work out the properties of planets in other stars' dust disks.
应用推荐