Currently, the influence of dewatering of foundation pit on important surrounding buildings is a hot issue in foundation pit engineering, so the influence in the engineering dewatering of Sofia Underground Trade Estate on Sofia Church has been paid much attention.

Stability of two-dimensional interfacial flow and elliptic condition of phase orbit equation

二维界面流的稳定性及相路方程的椭圆型条件

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The curve types of tool nose orbit are theoretically proved and the controlling equations of elliptic tool nose orbit are developed.

理论证明了刀尖轨迹的曲线类型并建立了椭圆刀尖轨迹的控制方程。

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Burning information under low thrust is studied for a small satellite transfering from a elliptic parking orbit to its circular working orbit.

文章研究了在小推力作用下，小卫星由椭圆停泊轨道进入共面圆工作轨道的点火信息求解方法；

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Ideal satellite formation configuration with an elliptic reference orbit

椭圆参照轨道的理想卫星编队队形设计

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Then, a genetic algorithm is used to solve the optimization problem in the cases of impulse assumption, low thrust orbit maneuver from a hyperbolic orbit to an elliptic orbit, and low thrust orbit maneuver from an elliptic orbit to a circular orbit with transfer time constraint.

然后，分别利用遗传算法解决了冲量假设下的最优转移、小推力加速情况下从双曲线到椭圆的转移轨道优化，以及转移时间有约束情况下的从椭圆到目标圆轨道的转移轨道优化问题。

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Driven by two signals of biased bar with phase difference of π/ 2, the free end of a cantilever ( named as series bending arm) composed of two series piezoelectric bimorphs will move along an elliptic orbit when the other end is fixed.

二级串联压电双晶片（串联臂）一端固定时，在相位差为π/2的偏置方波信号驱动下，自由端将沿椭圆轨迹运动。

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With the decrease of the solar mass, namely, with the decrease of the solar gravitational field, the orbital scope of the planet extends, and the form of the elliptic orbit may become flatter.

随着太阳质量变小，即随着太阳引力场变弱，行星椭圆轨道变大，轨道形状变得越来越扁平。

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Aiming at acquiring high apogee accuracy, this paper does research in middle way correction control during the large elliptic orbit transfer and has got such achievements. A control method based on the terminal of Lambert problem was proposed.

本论文针对远地点入轨高精度需求，研究大椭圆轨道转移中途修正控制问题，取得如下创新研究成果：提出了一种基于Lambert问题的终端控制法。

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Driven by two signals of the biased bar with phase difference of π/ 2, the free end of a cantilever arm will move along an elliptic orbit.

一端固定，另一端自由时，在相位差为π/2的一定频率的方波信号驱动下，弯曲臂的自由端将形成类似椭圆的运动轨迹。

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The method of designing special elliptic orbit which was critical inclined, sun synchronous and repeating ground trace was expounded, and the calculation process of this method was summarized.

阐述了临界倾角太阳同步回归轨道这种特殊椭圆轨道的设计方法，总结了其轨道要素的计算步骤。

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Of hydrogen atom or hydrogen like ions, the elliptic orbit, energy, orbital velocity, period and quantization are discussed in brief and perfection.

对氢原子或类氢离子中电子的椭圆轨道和能量及其量子化等给出了一个简明、完善的讨论。

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After that, an elliptic orbit two-impulse guidance method is introduced. Furthermore, this paper also gives a kind of nonlinear guidance method for space rendezvous.

最后，在椭圆参考轨道相对运动模型的基础上，研究了椭圆参考轨道的二脉冲交会制导策略。此外，本文还给出了一种空间交会的非线性制导方法。

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Chaos and its control in the planar libration of a magnetic rigid spacecraft with internal damping in an elliptic orbit are investigated.

研究在具有内阻尼的磁性刚体航天器在椭圆轨道上平面天平动的混沌及其控制。

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Pluto has an elliptic orbit. Research on Outer Race Elliptical Groove Grinding with Basin-like Grinding Wheel

冥王星的轨道是椭圆形的。盆状砂轮磨削钟形壳椭圆沟道的研究

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A relative motion model, considering the J_2 perturbation and suitable for motion in general elliptic orbit, was used.

相对运动模型中考虑了地球形状摄动的影响，且适用于在椭圆轨道上运行的目标航天器。

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This paper presents some equations of adjoint motion for spacecrafts moving in elliptic orbit of different plane.

本文给出在非共面椭圆轨道上运行的航天器的伴随运动方程。

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Chaotic Attitude Motion of Satellite on Elliptic Orbit

椭圆轨道上卫星的混沌姿态运动

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On the Electron Elliptic Orbit Paying Regard to the Nuclear in Motion

虑及核运动的电子椭圆轨道

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Calculating Method of Series for the True Anomaly of a Spacecraft Elliptic Orbit

椭圆轨道真近点角的级数计算方法

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1-f That must be equal one minus f times the orbital period of the astronauts who are in circular orbit.

这等于，乘以在圆形轨道的，宇航员行进的周期。

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