基于InSAR的西安地面沉降与地裂缝发育特征研究

哺乳动物细胞胞质分裂过程中伴随着一系列形态学改变，随着分裂沟不断收缩，形成连接两 个子细胞的细胞间桥. 间桥不断拉长、变细，直至断裂、生成两个子细胞. 采用细胞力学 和形态学测量及分析方法，通过施加肌球蛋白II抑制剂，定量研究了NRK细胞间桥变细动力 学; 采用细胞免疫荧光技术, 检测了早期胞质分裂肌动蛋白的分布，揭示肌球蛋白II缺失细 胞胞质分裂可能的机制. 结果表明：施加肌球蛋白II抑制剂的NRK细胞, 其整体形态学和细胞 间桥形态学曲线明显不同于0.3%DMSO组. 根据流体力学特性和所测量的力学参数对曲线 进行模拟发现，表面张力对肌球蛋白II抑制组细胞的间桥动力学曲线轨迹影响很大. 研究结 果提示由细胞力学特性决定的拉普拉斯压力和细胞运动共同参与了肌球蛋白II缺失细胞胞 质分裂的调节.

INSAR BASED EVALUATION OF LAND SUBSIDENCE AND GROUND FISSURE EVOLUTION AT XIAN

Xian city has been experiencing serious land subsidence and ground fissure activities for a long time.  SAR interferometry (InSAR) has been applied to monitor the spatio-temperal characteristics of land subsidence and ground fissure in this area since 1992,  where adaptive interferogram filtering and phase unwrapping algorithms with gross elimination are considered in each interferometric pair. The InSAR results are calibrated with leveling and GPS results in the similar monitoring time, respectively. One centimeter precision is achieved. In conclusion, the main subsidence regions are the eastern and southern suburbs.  The second subsidence stage was the maximum stage with nearly 21cm subsidence in 1996. The subsidence rate has decreased to 8 cm while the subsidence cone has shifted to southwestern suburb.  It is also detected that the non-linear deformation  is in active ground fissure areas and the subsidence rate in the south  is larger than the north. This research results can give a great data support for  further inversion and hazard mitigation.