瞬变测深的S域研究

基金项目:

国家自然科学基金项目资助(40374052)

详细信息

The analysis of TEM signal in the S-domain

摘要: 利用时频分析研究瞬变测深中的瞬变信号,已有多种方法给出了定性的结果。但更深入的获取瞬变测深中的地下信息,还需给出定量描述。本文利用S变换和广义S变换研究了瞬变测深信号,并与其他结果做了比较,给出了S变换下瞬时频率（IF）估计的方法。利用这种方法研究了瞬变测深,同时讨论了瞬变测深信号在S域的去噪问题。理论模型与实例均给出了理想的结果。
- 瞬变电磁场 /
- 时-频分析 /
- S变换 /
- 瞬时频率
Abstract: Several papers have given the pilot study of transient electromagnetic(TEM) field signals using joint time-frequency analysis(JTFA).However,all the JTFA methods have their advantages and disadvantages,and for deep insight the information in TEM the comparison between these methods and newly presented S-transform is necessary.This paper first uses S-transform and generalized Stransform processing transient electromagnetic(TEM) signal.Secondly,gives a method of evaluation instantaneous frequency(IF) using S-transform and give the result of the comparison.Thirdly,it gives a character of TEM diffuse by using IF.In the end this paper discuss the denoise in S-domain.
- transient electromagnetic field /
- time-frequency analysis /
- S-transform /
- instantaneous frequency