The multi-element orthogonal polynomial regression is used for traditional optimization technique of parametric optimum design, and the experimental research is done by some experiential formula.
传统的研究方法是采用多元正交多项式回归参数优化设计，通过获得一些经验公式来进行实验研究。
T. ma was studied on the base of other studies, the experiment adopted with the combination design of orthogonal and quadratic regression equation.
采用三元二次回归正交组合设计，研究了氮、磷、钾三因素五个水平对湖北麦冬产量的影响。
At realm of surface roughness of machined surface, forecast mathematical model is set up by using quadratic regression orthogonal design between NC turning parameter and machined surface.
在已加工表面粗糙度研究领域引入回归正交分析，采用多元二次回归正交设计得到了数控车削参数与已加工表面粗糙度的回归预报模型。
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