The factors of MOS transistor in the saturation region are analyzed, the mismatch models are optimized, and the model parameter extraction is done by least squares curve fitting method.

通过分析MOS管在饱和区失配因素，优化MOS管失配模型，提出用最小二乘曲线拟合法进行相关模型参数提取。

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Solar cell both exponent mathematical model can be obtained exactly using a few measurement data by the least squares fitting method that parameter can be separated.

用参数可分离非线性最小二乘拟合方法，根据少量测量数据较准确地求得了太阳电池双指数数学模型。

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A new method tuning the PID parameters is presented by the normalized dead time of process. The tuning formulae are obtained from the curve fitting in the least-squares sense.

提出了一种利用标准化死区时间整定PID参数的新方法，并利用曲线拟合最小二乘法求得控制器的整定公式。

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