3D inversion of borehole-surface electrical data for complex geo-electrical models is still a challenging problem in geophysical exploration. We have developed a program for 3D inversion to borehole-surface electrical...3D inversion of borehole-surface electrical data for complex geo-electrical models is still a challenging problem in geophysical exploration. We have developed a program for 3D inversion to borehole-surface electrical data based on the quasi-analytical approximation (QA) and re-weighted regularized conjugate gradient method (RRCG) algorithms using Visual Fortran 6.5. Application of the QA approximation to forward modeling and Frechet derivative computations speeds up the calculation dramatically. The trial calculation for synthetic data of theoretical model showed that the program is fast and highly precise.展开更多
运用BOD微生物传感器快速测定仪,对微生物传感器快速测定法的检出限、精密度、准确度等一系列实验室质量控制要求进行了测定。并在此基础上,对大量不同行业和环境水体的实际样品进行了B O D快速测定法与国标五日生化需氧量法(BOD5)对比...运用BOD微生物传感器快速测定仪,对微生物传感器快速测定法的检出限、精密度、准确度等一系列实验室质量控制要求进行了测定。并在此基础上,对大量不同行业和环境水体的实际样品进行了B O D快速测定法与国标五日生化需氧量法(BOD5)对比实验,通过所得到的比对数据以BOD5为基准对BOD快速法的适用性进行了探究。展开更多
文摘3D inversion of borehole-surface electrical data for complex geo-electrical models is still a challenging problem in geophysical exploration. We have developed a program for 3D inversion to borehole-surface electrical data based on the quasi-analytical approximation (QA) and re-weighted regularized conjugate gradient method (RRCG) algorithms using Visual Fortran 6.5. Application of the QA approximation to forward modeling and Frechet derivative computations speeds up the calculation dramatically. The trial calculation for synthetic data of theoretical model showed that the program is fast and highly precise.
文摘运用BOD微生物传感器快速测定仪,对微生物传感器快速测定法的检出限、精密度、准确度等一系列实验室质量控制要求进行了测定。并在此基础上,对大量不同行业和环境水体的实际样品进行了B O D快速测定法与国标五日生化需氧量法(BOD5)对比实验,通过所得到的比对数据以BOD5为基准对BOD快速法的适用性进行了探究。