一种变网格差分的快速行进法
何幼娟, 乔玉雷, 侯丽娟, 竺俊, 高刚, 王鹏

A grid-variable finite-difference fast marching method
You-Juan HE, Yu-Lei QIAO, Li-Juan HOU, Jun ZHU, Gang GAO, Peng WANG
图11 三种方法地震走时等时线
a—全区域;b—局部放大
Fig.11 Three methods isochronal line for traveltime
a—the whole area;b—fractionated gain