海洋磁力异常逼近方法研究

Research on Approximation Method on Marine Magnetic Anomaly

通过对常用的数值逼近方法的分析和研究,针对海洋磁力测量的特点,仿真计算分析了移动曲面法、Hardy多面函数法、Shepard法和Kriging法在不同情况下的插值精度。同时,给出了一个实例来计算分析四种逼近方法插值精度。仿真与实例计算结果表明,已知点的分布情况及磁异常变化情况不同时,四种逼近方法的插值精度是不同的。针对不同的情况,本文总结出了适合于海洋磁力异常逼近的方法。

With the analysis and study of general numerical approximation methods, according to the characteristic of the marine magnetic survey, moving curved surface method, Hardy polyhedral function method, Shepard method and kriging method are emulated and analyzed in case of different interpolation accuracy. Simultaneously, the interpolation accuracy of the four kinds of approximation methods are calculated as example. The results of the emulation and example show that the interpolation accuracy of these methods are different with distributing of known survey point and change of magnetic anomaly. For different instances, this paper summarizes correspondent methods suitable for marine magnetic anomaly approximation.