方法：采用正交设计法，以加水量、浸泡时间、煎提时间为可变因素，选用L9(34)表进行试验。
Methods: Use orthogonal test, act the swimming ability, soak time, decoct extraction time as changing factor, select L9 (34) table to conduct test.
试验采用正交设计表法，选用L9(34)正交表安排试验，4次重复。
The experiment is adopted orthogonal Design and chosen L9 (34) orthogonal tables to repeat 4 times.
每一轮正交设计中，探索设计空间的试验点依据正交表围绕一个中心点产生，设计变量的取值范围逐渐减小。
In each times of orthogonal design, the experimental points which detect the design space are generated according to the orthogonal table around a central point and the range o.
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