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1·Objective: To study the zero signal point in the MRI inversion recovery technology.

目的：研究核磁共振成像反转恢复技术中零信号点。

2·By means of the null point, growth index analysis and displacement distance plot, the authors discussed the process of negative structure inversion.

采用零点、距离位移曲线和生长指数等定量分析方法，讨论了断裂的构造负反转过程。

3·Methods: Using the MRI inversion recovery technology systemically in theory and get the mathematical expression of the zero signal point.

方法：从理论上对核磁共振成像反转恢复技术进行系统研究，获得零信号点的数学表达式。

4·The summary of Fuling Sewage Treatment Works in the Three Gorges area and its characteristics and principles of division point inflow inversion A2/O technique are introduced.

介绍了三峡库区涪陵污水处理厂的概况及采用的分点进水倒置A2/O工艺的特点和原理。