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。

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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。

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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。

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