The sign pattern matrix class of a is defined by the set of all real matrixes those sign pattern is a.
的符号模式矩阵类定义为符号模式为A的所有实矩阵的集合。
With the affirming and denying degree to the trouble, sets up fuzzy matrix of screening according to trouble sign, thus diagnose the vibration trouble of rotatory machinery.
根据故障征兆对故障的肯定和否定程度，建立模糊筛选矩阵，从而对旋转机械的振动故障进行诊断。
Based on the spectral set of skew-symmetric matrix, the result that a class sign pattern matrix with zero diagonal is unique inertia was proved by using orthogonal similarity transformation.
本文基于反对称矩阵的谱集，采用正交相似变换，得到一类具有零对角的符号模式矩阵具有唯一惯量的结论。
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