球对称引力场是引力理论中最重要而又最简单的模型之一，它已为人们广泛的研究。

The spherically symmetric space-time, which is widely studied, is one of the simple and important models in gravitational theory.

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首先，我们对几何活动轮廊模型中吸引力场进行正则化，扩大目标轮廊边缘对的轮廊曲线的吸引力范围，增加轮廊曲线搜寻凹轮廊的能力。

First, we regularize the attraction force field in the geometric active contour model to extend the capture range of the object boundaries, and improve the ability of convergence to the concavities.

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利用TOPEX资料可以得到新的地球引力场、海洋大地水准面和海潮模型。

Using TOPEX altimeter data, a few new earth gravity models, geoid models and ocean tide models were generated, and these models were better than old models.

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