During the study of transformation from TEM diffusion field sounding data to plane-wave electromagnetic sounding data,it has been discovered that there exist distortions in early-time data because of using late-time calculating formula in all time delay and configuration.
在对瞬变电磁视电阻率数据向平面波场测深视电阻率数据转换时,发现由于瞬变电磁使用晚期计算公式及装置问题,使测深曲线早期数据发生畸变。
Research for maintaining stale data based on data warehouse technique;
基于数据仓库技术维护过期数据的研究