Through pointing out the limitations of taguchi outer / inner orthogonal array experiment method , it has been studied that three methods : comprehensive noise factors , split - plot experiment and direct modeling of response using combined arrays , are alternatives to the orthogonal array design 3通过指出田口的内外正交表试验中存在的缺陷，研究分析了替代正交试验的三种方法：综合噪声因素法、裂区试验法和利用结合表直接建立响应模型法。
By applying the generalized hadamard product and difference matrix to orthogonal decomposition of projection matrices , further results on the orthogonal arrays obtained by the generalized hadamard product are presented . several classes of orthogonal arrays having more columns than the existing arrays are obtained ?把正交表的广义hadamard积和用差集矩阵构造混合水平正交表的方法联合起来应用到投影矩阵的正交分解中，使得所构造的正交表具有更多的列。
By using the theory of finite fields , the relationship of module operation among difference matrices of a mixed difference matrix is generalized to that of group homomorphism . a new concept of normal mixed difference matrix is proposed . the relationship between normal mixed difference matrix and the construction of orthogonal arrays is discovered ?利用有限域理论，把不同水平差集矩阵之间的取模运算关系推广为更加广泛的群同态关系，提出了标准混合差集矩阵的概念，找到了标准混合差集矩阵和混合水西安电子科技大学博士学位论文:正交表的构造方法及其应用平正交表的构造之间的关系，提出了利用标准混合差集矩阵构造正交表的方法且构造了一些新的正交表
This means the saturation degree of concrete is different . by means of analyzing the l9 ( 34 ) orthogonal table , the air content is the chief factor , the second factor is water binder ratio and the third is mineral admixture in both high water pressure and low water pressure . the water saturation degree of concrete in damaging point ( e6 / e0 = 60 % ) can be found by measuring the dynamic modulus of elasticity after six freezing - thawing cycles 采用l9 ( 34 )正交表对水胶比、含气量和掺合料三个因素进行分析,试验结果表明:在自然情况下,影响混凝土水饱和系数的主要因素是水胶比,而影响混凝土在盐溶液中饱和系数的主要因素则是含气量;在水压力作用下,无论压力大小,混凝土水饱和系数的影响次序依次为含气量、水胶比、掺合料。
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The paper introduced testing principle of infrared image in course of metallurgy heat engineering testing , based on several applied examples , analyzed application properties and range of infrared image technique and thermal image analysis in heat engineering analysis 针对南京某热电厂8锅炉燃烧调整试验,详细分析了正交试验方案设计过程中的几个关键步骤,如:决定试验因素、选择因素水平及选择正交表.并且采用极差分析和方差分析方法对试验数据进行了分析,提出了锅炉在典型负荷下的优化运行方式
Finally , the weight lighting of this car body is about 43 . 45 kg . the research of this dissertation includes passenger body theory , fem theory , ansys appliance , static and dynamic test and so on . there are many special topics such as establish and predigestion of fem model , post - processor of ansys , prepare of test and cautions 本课题的研究内容，概括了客车车身理论、有限元理论与计算、 ansys软件应用、客车静动态试验、正交试验法运用等，并且对许多关键性问题，如有限元模型的建立与简化、软件后处理的数据分析技巧、静动态试验的准备与注意事项、正交表编排等都进行了较为深入的探讨。
Orthogonal arrays are essential in statistics and they are used in computer science arid cryptography - in statistics , they are primarily used in designing experiments , which simply means that they are immensely important in all areas of human investigation : for example , industry , agriculture , quality control and product improvement 正交表在统计上是必不可少的，而且被用于计算机科学和密码学。正交表在统计上主要用于试验设计，这意味着正交表在人类研究的各个领域都非常重要。例如工业、农业、质量控制和产品改进。
By using matrix theory and the theory of finite fields , we study the applications of projection matrix , permutation matrix , difference matrix , hadamard product , the generalized hadarnard product , kronecker product , kronecker sum and the generalized kronecker sum to construction of orthogonal arrays 本文利用矩阵理论和有限域理论，研究了投影矩阵、置换矩阵、差集矩阵、 hadamard积、广义的hadamard积、 kronecker积， kronecker和、广义的kronecker和在构造正交表方面的应用。
The cubic orthogonal design is formed through the cubic orthogonal algorithm and neutral network and this algorithm is comprised with such models as select ing the cubic orthogonal table , establishing neutral network model , wavelets analyses processing and variance analyzing of the result , each model connected and mingled with each other 智能正交设计是用立体正交算法和神经网络算法相结合而形成的；立体正交智能设计由下述模块组成：选取立体正交表、建立神经网络模型、小波分析处理、结果方差分析等模块，各个模块彼此交融、互相连接。
