The paper proposes a fast algorithm for cost of building per square meter based on fuzzy theory and smooth exponential prediction, this algorithm is universal significance of application.
基于模糊理论和指数平滑预测相结合的方法，给出了以预测单方造价为基础的投标工程单方造价快报算法。其算法具有普遍的应用价值。
Then, a criterion of estimate and FMLS (Fast Multi-Step Least Square) algorithm proposed by the authors are used to obtain the dynamic model of the heat exchanger.
然后利用估计准则方法及快速多步最小二乘法（FMLS）辨识换热器的动态模型。
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