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根据实际数据，通过最小二乘法构造一级数对地下水位动态的周期趋势进行模拟，使周期值更符合实际，仿真实例说明本方法是可行的。
Based on the actual data, we construct a series number by the least squares method to simulate the dynamic trend of the groundwater level, and make the period value more realistic. Simulation results show that this method is feasible.