轨道计算

The result of this study provides a method calculating GPS satellite orbit parameters through IGS precise ephemerides.

本文研究的结果提供了一套由精密星历计算轨道参数的方法及一套各个GPS卫星在一个较长时间段内各历元时刻的轨道参数，为进一步的研究提供数据。

By simulating the EPR parameter D and the optical spectra, the distorted angles of two inequivalent sites which formed by Cr3+ replacing M3+ are determined and the obvious differences of the distorted angles calculated by using two spin orbit coupling parameter model and single spin orbit coupling parameter model are found.

通过模拟光谱和EPR谱确定了Cr3+取代 M3+形成的两种占位结构的畸变角，发现用双自旋轨道耦合系数模型与单自旋轨道耦合系数模型计算出的畸变角存在较大的差异。

Secondly, based on analyzing and calculating the normal state of digital jointless track circuit, every voltage of transmission and the adjustment resistance were numerated in this thesis.

其次，对数字无绝缘轨道电路的调整状态进行分析计算，确定出轨道电路传输通道中的各点电压值和调整电阻的大小。

The factors which affected total scale of URT were analyzed. Hierarchy model of affected factors and model of computing total scale of URT were constructed.

分析影响城市轨道交通线网总体规模的因素，建立了各影响因素的多级递阶结构模型和计算城市轨道交通线网总体规模的数学模型。

At last, Hartree-Fock and Density Functional Theory was used to calculate the Mulliken bond orders, HOMO and LUMO. The "principle of the smallest bond order" and the "principle of the easiest transition" were selected to judge the decomposition potential of the nitration products, and the results indicated trinitrotoluene would decompose easier than other product, and it was consistent with the experimental results.

最后，采用Hartree-Fock方法和密度泛函方法计算了各硝化反应中主要有机物的Mulliken键级、最高占有轨道能和最低空轨道能，采用&最小键级原理&和&最易跃迁原理&判断出三硝基甲苯最易分解，这与实验结果一致。

Dynamic interaction of wheel-rail is studied by using DSAS software when Blue-Arrow power car, trail car,"SS8" locomotive and passenger car with "209" bogies pass through a curve with severe rail oblique crack in Guang-Shen railway, respectively. Results of the above cases are compared and analyzed. Based on these results, effect of track structure parameter and train speed on dynamic interaction of wheel and rail in curve track is discussed, and a set of synthetic and effective technology measure which eliminates or releases rail oblique crack is put forward, The results can be expected to provide theoretic basis and guidance for engineering practice.

运用DSAS软件，研究了&蓝剑&动车组动车、拖车、&SS8&机车和209转向架客车通过广深线某钢轨斜裂纹重伤曲线的轮轨动态相互作用，并对几种车型的计算结果进行了比较和分析；在此基础上，讨论与分析了轨道结构参数及行车速度对曲线轨道的轮轨动态相互作用的影响，从而提出了一套综合有效的抑制或减轻钢轨斜裂纹的技术措施，以期为工程实际提供理论依据和指导。

This time, several main task personnel anxiously is waiting for the region senior official, as soon as saw the yellow senior official's to rush, immediately put through the event to report the place yellow race Mars interspace observation station, after Huang Qu senior official yellow Jinlong and the crew has greeted, directly arrived in front of the giant computer display monitor, not big a while, transmitted Mars aspect the live videotaping, saw only observes stationmaster a face startled appearance, saw the yellow senior official, immediately slightly calm, but still some aphasias explained religious doctrine:"Reports the yellow senior official, because in the short-term Milky Way nameless region will have a super giant star to have the violent detonation, instantaneous will produce in it the formidable shock-wave as well as will cause from this under the rapid change gravitational field together function, caused in the Milky Way correlation region to have a series of chain-reactions, finally forced a distance Earth probably is 20,000,000,000 kilometer diameter 100 kilometer about planetoids changed its original movement track; Latter passed through the home station most advanced computer to calculate repeatedly has obtained an astonishing result: This will change orbital the planetoid rapidly to hit after a year to ours Earth!"

此时，几名中心工作人员正急切地等待着区域长官，一见黄长官闯了进来，就立即接通了事件报告地点黄色人种火星星际观测站，黄区长官黄金龙与全体工作人员打过招呼后，就直接来到巨型电脑显示屏前，不大一会儿，就传来火星方面的实况录像，只见观测站长一脸惊慌的样子，见到黄长官，立刻稍微镇定了一下，但仍有些失语般地讲道：&报告黄长官，由于近期银河系无名区域内有一颗超级巨星发生猛烈的爆炸，在其瞬间产生的强大冲击波以及由此而导致的迅速改变的引力场共同作用下，引起银河系相关区域内发生了一系列的连锁反应，最终迫使一颗距地球大约为200亿公里的直径100千米左右的小行星改变了其原有的运行轨道；后又经本站最为先进的电脑反复计算得出了一个惊人的结果：这颗改变轨道的小行星将于一年后急速撞向我们的地球！&

A GPS Doppler model was constructed by using geometric scalar analytic approach, considering the fact that observer is not necessarily on the ground trace of the satellite. In addition to the modeling and computation of orbital angular velocity, visible window of satellite, and the maximum elevation earth-centered angle, Doppler's characterization with regard to the observing time was deduced and analyzed.

采用几何标量分析方法，建立了地心地固坐标系中GPS信号多普勒频移分析模型，计算了卫星可见地心角、卫星轨道角速度和卫星可见区间，推导并分析了多普勒频移关于接收机最大可见仰角、卫星轨道角速度和卫星可见时刻开始所经历的时间等参数的变化规律。

Since the contribution of the spin-orbital coupling interaction of the ligand to optical and electron paramagnetic resonance spectra can not be neglected, the optical and EPR spectra g factors g‖、g⊥ and hyperfine structure constant A‖、A⊥ of LiHSO4:VO2+ crystal are calculated from the high-order perturbation formulas on the basis of double-spin-orbital coupling model and crystal-field theory for 3d1 ion in tetragonal symmetry.

考虑到配体离子的自旋－轨道耦合作用对光谱和电子顺磁共振谱的贡献不可忽略，采用3d1离子在四角对称下基于双自旋－轨道耦合模型的高阶微扰公式和晶场理论公式，理论计算了LiHSO4：VO2+晶体的光谱和电子顺磁共振参量g因子g‖、g⊥和超精细结构常数A‖、A⊥。

The multi-impulse suboptimal solutions are presented for the formation reconfigurations between the elliptical formation and the pendulum formation, and the control scheme can be obtained directly from the initial and the desired relative orbits by using these solutions, at the same time the fuel consumption is suboptimal.

对于后面两种编队重构形式，本文也提出了一个多冲量次优控制解，这个解的优点是既满足了燃料消耗较优的条件，又只需根据初始相对轨道和目标相对轨道参数即可很容易计算出相应的控制策略。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失