... 直接人工成本变异数 direct labor cost variance 直接最少平方法 direct least squares method,DLS 直达线 direct line ...
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Direct parameters were attained from the measurement data, and hidden parameters of the model were calibrated using the generalized least squares method.
模型的直接参数通过实测数据获得, 隐含参数利用非线性最小二乘法拟合反求获得。
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