In each optimization design iteration, sensitivity filtration is carried out after objective function sensitivity is obtained by calculation.

每次优化设计迭代中，计算得到目标函数灵敏度后进行灵敏度过滤。

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By conservation equation, results will be get by iterative calculation, after each iteration, the parameters will be amendment.

通过守恒方程进行迭代计算，并对参数进行修正，最终得到满意结果。

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The influential factors of calculation error for groundwater table are discussed by using the iteration method to find solution of numerical model in the mine drainage forecast of deep drawdown.

本文讨论了大降深矿井排水预测中 ，利用迭代法求解数值模型时 ，地下水位计算误差的影响因素。

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