two-body problem

A new intelligent planning algorithm which is used for fixed-time, point-to-point, multi-impulse orbital maneuver in the two-body problem is proposed in this paper.

针对二体轨道模型，设计了一种时间固定点对点多冲量轨道机动的智能规划算法。

Part of the problem is that almost two decades after Amazon filed the one.click patent, the online retail shopping and buying experience is filled with frictions.

部分问题在于，在亚马逊申请“一键式”专利近20年后，在线销售和购买体验十分不匹配。

Fundamentally, there are two different approaches to the problem.

从根本上说，这个问题有两种不同的处理方法。

We can reduce the problem to two main issues.

我们可以将这个问题概括成两个要点。

He's offered us his villa by the sea for two weeks. The only problem is that we can only have it in February, which rather takes the gilt off the gingerbread.

他把海边的别墅让给我们住两个星期. 但是美中不足的是我们只能在二月份去, 这就有些扫兴了.

Despite this problem, many students are still drawn to these institutions — and two-year schools in particular.

尽管有这个问题,许多学生仍然被这些机构,特别是两年制学校所吸引。

Introduce the reference frame and time system used in orbit design particularly. Analyzed the orbit characteristic of two-body problem and launch window.

详细介绍了用于轨道设计的坐标系统和时间系统，分析了二体轨道特性和发射窗口的基本特性。