试验中采用了三因素三水平正交多项式回归设计，并建立了影响再生效果的数学模型。
In the experiment, normal multinomial regressive experimental design of three factors and three levels was adopted and mathematical models of regeneration effect were set up.
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。
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。
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.
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