摘要
地下电磁波法的解释工作，原用的直射线代数重建层析方法，从理论分析即能看出。存在着对小目标反映不明显的局限性．另一方面，实际观测到的场值是叠加场，包含目标的散射信息，在多重情况下有明显的规律，可以表示成一定的模式．借助正演，反映出这些场值的规律，这是建立模型模式的过程，它为一种新的解释方法──模式识别，打下了基础．
The tomography algebra algorithms such as ART, SIRT as well as intersection only consider the attenuation of ray paths; hence they can not be applied to the data processing and interppretation of complex geological conditions. On the basis of forward problem computation, the models suitable to diverse geologic conditions and some distinct features have been built up and found. At first, rearray the observation data into a frame to generate a 4-D data set. The sections in different direction of this frame are data matrix, each matrix is called information plane. They reflect the features of anomalies. The contours of normal field on fixed frequency and multisource information plane. It is a series of parallel lines which lie symmetrically about the main diagonal of the matrix. By studying the scattering point, we can tell the features of multisource information with points at different positions. According to the results of modeling computation, it is further verified that the features of multisource observation results on information plane reflect the positions of models. The examples show that we can build up more recognition patterns with the help of forward problem library and further it is available for the establishment of a new processing and interpretation system.
出处
《地球物理学报》
SCIE
EI
CSCD
北大核心
1994年第2期245-252,共8页
Chinese Journal of Geophysics
关键词
地下电磁波法
多重信息平面
场值
Underground electromagnetic waves method
Multisource information plane
Patterns
Tomography
Scattering.
