地下介质三维模型中界面的描述方法

介质模型可分为离散模型和连续模型，离散模型，使用规则网格或不规则网格将空间离散化，网格内介质参数不变，对连续模型，可用解析函数描述，或者由插值方法得到介质参数的空间分布，连续模型的描述，要素之一是界面的描述方法，本文借助计算机图形学和计算机辅助几何设计中发展起来的曲线和曲面技术，使用参数形式的Coons曲面、Bezier曲面、B样条曲面和三角形面片，描述三维地质构造,结合地震勘探采集系统设计的实际需要，给出一种三角形面片的模型描述方案。

The Methods of Describing the Underground Model

The methods describing models can be classified into two categories: discrete and continuous. The discrete methods divide the model into many little blocks using regular or irregular grids. The continuous methods use analytic functions or interpolation methods. One important element of the continuous method is how the interface is described. Considering the techniques developed greatly in the subjects of computer graphics and computer aided geometry design, the modele introduced with Coons surfaces?Bezier surfaces?B-spline surfaces and triangle meshes. Especially, for the need of the exploration's data acquisition system, a scheme using triangle meshes is giving.