摘要
基于层状导电和可极化大地表面，电偶源电场的时间谱在无随机干扰和有随机干扰时，进行频谱转换的计算结果，证明了时—频转换的误差传递问题严重。但是，采用窗口（圆滑）滤波可以有效压制随机干扰，使时—频转换达到必要的计算精度。
The frequency spectrum of the electric field, produced by an electric current dipole on the surface of the uniform conductive and polarizable earth, is transformed into time spectrum, with or without some random error added, and the time spectrum is then inversely transformed into the frequency domain. The problem of error transfer in the time-frequency transformation is discussed by comparing the transformed frequency spectrum with the original one. The tentative scheme of processing and interpreting the measured data of TSR method by time-frequency transformation is feasible.
出处
《物探化探计算技术》
CAS
CSCD
1998年第2期109-115,共7页
Computing Techniques For Geophysical and Geochemical Exploration
基金
国家自然科学基金
关键词
电偶源电场
时间谱转换
频谱
误差
time spectral resistivity method, time-frequency transformation, electric current dipole
