研究了基于三体问题的不变流形设计低成本登月轨道的问题。
The low-energy lunar landing trajectory design using the invariant manifolds of restricted three body problem is studied.
然后基于不变流形理论和庞加莱截面方法，设计了不同拉格朗日点间转移轨道。
Then on the basis of invariant manifold theory and Poincaré section, a transfer trajetory between L1 and L2 of the Earth-Moon system was given.
通过找出两端边界层的不变流形，并且给出边值条件解耦的条件，成功构造了边界层函数。
Boundary functions are successfully constructed through finding out invariant manifolds at both end boundary layers and giving out decoupling conditions of boundary value conditions.
本文通过构造形式级数的方式，给出了一种三维保测度映射系统中一维不变流形和二维不变流形的计算方法。
In the paper researches on a three-dimensional measure-Preserving mapping system are made, which is the three-dimensional extension of the Keplerian map-ping.
另一方面，电离层对流形态和晨昏对流圈的经向跨度及其两端的位置是基本不变的。
At the same time, the longitudinal range and the positions of the two boundaries of the ionospheric convection pattern remain basically unchanged.
在黎曼流形上分别给出了伪不变凸函数和弱向量似变分不等式的概念。
The definitions of pseudo-invex function and weak vector variation-like inequality on Riemannian manifolds are presented.
利用不变形式的方法对复流形上的CR—子流形进行了一定的研究。
In this paper we study CR - submanifolds of a complex manifold using the method of the invariant form.
在一定条件下，设计的滑动模控制律使得系统沿预先设计的滑动流形的滑动运动对系统的参数摄动和外干扰具有不变性。
Under certain conditions, the designed variable structure control law makes the sliding mode along a specified sliding manifold invariable to the system perturbation and external disturbances.
Moebius第二基本形式是单位球面上子流形的重要的Moebius不变量，本文给出了S3中具有半平行Moebius第二基本形式的曲面的分类。
Moebius second fundamental form is important Moebills invariable on the unit sphere of submanifolds, in this paper, we classify the surface in s ~ 3 with semi-parallel Moebius second fundamental form.
Moebius第二基本形式是单位球面上子流形的重要的Moebius不变量，本文给出了S3中具有半平行Moebius第二基本形式的曲面的分类。
Moebius second fundamental form is important Moebills invariable on the unit sphere of submanifolds, in this paper, we classify the surface in s ~ 3 with semi-parallel Moebius second fundamental form.
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