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《COAL GEOLOGY & EXPLORATION》 1999-03
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PRELIMINARY STUDY ON JOINT TIMEFREQUENCY ANALYSISOF TRANSIENT ELECTROMAGNETIC FIELDS

Chen Mingsheng(Xi'an Branch of CCRI)Li ZhengbinYan Shu(Xi'an Jiaotong University)  
On the base of the introduction of joint timefrequency analysis principle,the behaviors of timefrequency distribution on transient response signals of several geoelectric models are studied.It is demonstrated that under the general trend of the timefrequency distribution strength weakened with the depth,the strength is changed obviously by the effect of resistivity,the strength is larger when the resistivity is lower and vice versa. Thus,the relationship between the joint timefrequency distribution of transient fields and geoelectric structure is established and the transient field data could be interpreted better.
【CateGory Index】: P631.325
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