轨道计算

It shows that the orbit design of a LEO satellite can support occultation footprint to stay over 100-km neighborhood of a given region for about 130 days.

计算结果表明：该轨道可以使得无线电掩星的地面测点维持在辐射半径为100km之内的区域达130天左右。

The character of LEO-LEO satellite occultation events is well discussed in this paper. The impact of satellite orbit parameters on the number and distribution of occultation events are discussed based on simulation.

文章对LEO-LEO卫星掩星事件的特性进行了深入讨论，通过仿真计算定量讨论了轨道参数对掩星事件次数及分布的影响。

The chosen FP-LMTO method takes Fourie transforms of the LMTOs in interstitial region, which allow us to avoid the empty sphere in open structures. The supercell geometry is used in our calculation.

本文采用的FP-LMTO方法中对LMTO轨道的尾函数进行傅立叶变换，有利于处理具有开放晶体结构的ZnO及其缺陷，计算中采用超原胞几何构型。

The experiment result with real measurement shows that the new method can be used in real time autonomous satellite orbit determination with high accuracy.

实测数据的计算结果表明，新的定轨方法可以实时自主地得出卫星轨道的位置，并能达到较高的定轨精度。

This chapter makes use of satellite orbit space geometry to deduce mathematic model and formulas of judgment.

本章通过卫星轨道空间几何关系，推导得出用户判断所在波束的数学模型和计算公式。

The geometric structure, frontier orbital coefficients and frontier electron densities of the important lubricating oil additive Zinc dialkydithophosphate are investigated by using ab initio method.

采用量子化学从头算法，全优化计算了二烷基二硫代磷酸锌化合物的平衡几何构型和成键特徵，用前线轨道能级和组成以及前线电子密度等参数，探讨了ZDDP的润滑机理。

Comparison between the numerical results in earth orbit and that in lunar orbit shows the characteristics of the periodic distribution for thermal parameters of the solar array in lunar orbit, which will provide powerful references for the design of the solar array and the whole lunar satellite.

计算结果与地球卫星的相应数据进行比较，明确了月球轨道上电池阵所得外热流以及温度的周期分布特点，为月球卫星上太阳电池阵以及整个卫星的设计提供了有利的数据参考。

Furthermore,by using the periodic orbit theory,we calculate the Fourier transform ρ of the quantum spectra of the two-dimensional rectangular billiard system.

另外，利用周期轨道理论，我们计算了二维矩形弹子球体系的量子谱的傅立叶变换ρ。

Using the periodic orbit theory, we computed the quantum level density of a particle in the two-dimensional harmonic oscillator potential with and without the magnetic flux line for different cases.

利用周期轨道理论，我们计算了在不同情况下，一个粒子在二维谐振子势中存在和不存在磁通量时的量子能级密度。

It was also found that the absorption wavelength s of porphyrin and magnesium porphyrin had the general red shift.

计算结果表明溶剂环境中氢卟啉和镁卟啉分子的电子吸收光谱发生了普遍的红移，结合分子轨道理论对这种变化给出了可能的解释。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。