电磁波层析成像100例的统计分析

Statistics and Analyses for 100 Examples in EM Tomography

本文给出了最近十二年间１００个电磁波层析成像实例的统计资料，分析了电磁波层析的勘查精度与像元尺寸的关系，以及电波仪的频率设置，野外测量时的覆盖次数、方程组的欠定性等问题，并得出结论：为了提高电磁彼层析的实用水平，需要研制频带宽、功率大和天线短的新一代电波仪；也需要研究欠定方程组模式下的成像方法和重建算法。与此同时，叙述了重建算法研究中模型设计与实际情况脱节的不足之处。

Statistical data for 100 examples in EM tomography in recent 12 years were presented. By these data, it was analysed that the relations between exploration accuracy and the pixel size, as well as the problems of the frequency range of detector, the folds in field measurements, the underdetermined system of equations in EM tomography. We come to the conclusions that in order to improve the feasibility of EM tomography, it is meeded to develop new type of detector which will have a broad band response, Larger transmitting power and smaller antennas than the oldone. Also, the further studies on new imaging metiods and reconstruction algorithms for underdetermined system of equations ore required. The authors point out that some of theoreticd models at present are not suitablle to the field observational data.