三体问题

He is known for familiar results in elementary geometry; for example, the Euler line through the orthocentre (the intersection of the altitudes in a triangle), the circumcentre (the centre of the circumscribed circle of a triangle), and the barycentre (the "centre of gravity," or centroid) of a triangle.

他作了很大努力来发展一个较完整的月球运动理论，它由於包含了三体问题而特别困难；在1753年发表的部分解答曾帮助了不列颠海军部对月球表的计算。1772年，通过艰钜的心算完成了他的关於月球运动的第二种理论。

To place his equation on sound theoretical ground, Boltzmann founded the subject of ergodic theory, building a bridge between dynamics and statistics.

与Boltzmann同时代，Poincare给出了关于三体问题的著名定理，向Laplace的决定论提出了严正挑战。

It was created by Henri Poincare when he studied the three-body problem in the late nineteenth century.

它是由庞加莱时，他研究了19世纪后期的三体问题。

Invariant manifold theory was developed by Henri Poincar頩n the late nineteenth century when he studied the three body problem.

不变流形理论是由庞加莱頩n的19世纪晚期，他研究了三体问题。

In deep-space exploration, for some purpose, the probe is required to be at the libration points of the corresponding restrict three-body problem.

在深空探测中，出于某种探测目的，需将探测器定位在相应的限制性三体问题的秤动点上。

The numerical simulation showed that the condition for the stability of the collinear libration ponts can be used to the satellite formation.

通过数值模拟说明限制性三体问题秤动点的条件稳定运动可以为小卫星星座保持相对几何构形提供一种解决途径。

This paper computes periodic Halo orbits around L1 point in circular-restricted three bodies problem, composed of Sun-Earth-Probe, by means of numerical analytical method, and researchs the feature of these Halo orbits.

利用数值分析方法，找到了日－地－探测器三者构成的圆限制性三体问题中L1点附近的周期晕轨道，分析了轨道的特性。

Unlike ordinary monohull, trimaran slamming includes not only main hull bottom slamming,but also slamming of trimaran cross structure,which makes trimaran slamming more complicated.

新船型高速三体船的砰击问题与常规单体船不同，除了主船体底部砰击外还包括连接桥砰击，这使高速三体船的砰击问题更为复杂。

Based on the linear wave resistance principle,the wave resistance formula was established for the high speed trimarans with a main center hull and two small outer hulls.

本文据线性兴波阻力理论推导了辅船体与主船体水下体积不相等情况下的兴波阻力计算公式，据此以数学船型作为片体对高速三体船片体兴波干扰规律、兴波阻力曲线规律进行了研究，并采用简单枚举与等值线图谱相结合的方法对片体布局优化问题进行了探讨。

Accurate simulation of fluid field around trimaran and prediction of its resistance are the most crucial technical problems in design, performance improvement and hull form optimization .

因此准确模拟浅水域三体船周围的流场和预报其的受力已成为问题的重点之一，这对三体船的设计、性能提高和船型优化有重要意义，同时也有一定的科研价值。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。