说明：  本程序计算的是由U18(18/4)表计算混料均匀设计5水平18次试验的情况 具体算法可以参照《正交与均匀试验设计(方开泰，马长兴著，科学出版社出版)》一书144页开始的混料均匀设计一节。 或参见算法描述文档。
(This procedure is calculated by the U18 (18/4) Table 5 Calculation of mixture uniform design level testing 18 specific algorithm can refer to Orthogonal and Uniform Experimental Design (Fang Kaitai, Changxing Ma, and Science Publishing House) a book that began 144 a mixture of uniform design. Or see the algorithm described in the document.)