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复电阻率法在国外已有三十多年的历史。首先是“变频法”，接着是“相位激电法”，现今已综合发展成以测量振幅和相位谱为主的“频谱激电法”。目前，国外在实验室和野外研究的基础上，正致力于把频谱激电法推进到野外实际调查中去。加拿大凤凰物探公司新近制造的商售IPV-3系统就是专为推进频谱激电法而设计的。IPV-3采用了先进的计算技术和信
Complex resistivity method in foreign countries for more than 30 years of history. The first is the “frequency method”, followed by the “phase-lasing method”, has now developed into a comprehensive measurement of amplitude and phase spectrum-based “spectral method.” At present, based on the laboratory and field research abroad, foreign countries are devoting themselves to advancing the spectral agile method to the field actual investigation. The newly manufactured commercially available IPV-3 system from Phoenix Geophysical is designed to advance the spectrum-based approach. IPV-3 uses advanced computing technology and communications