Rased on the LANDSAT remote sensing images since the late 1980s, the area change of Lake Taihu in the recent 15 years was studied.

本文利用80年代后期以来不同时期的LANDSAT卫星遥感图像，研究了近15年太湖的面积变化状况。

Rased on the experimental researches, the characteristic behavior of slab and wall structure with unbounded prestressing in the slab under low frequency cyclic loading have been studied.

通过低周往复水平荷载试验，对无粘结预应力板墙结构的工作特性，以及无粘结预应力筋在水平荷载下的变化规律进行了分析。