Memory-Efficient 3-D LWD Solver With the Flipped Total Field/Scattered Field-Based DGFD Method. - Runren Zhang; Zhenguan Wu; Qingtao Sun; Mingwei Zhuang; Qiang-Ming Cai; Dezhi Wang 002; Qing Huo Liu (IEEE Geosci. Remote. Sens. Lett., 2020)