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The necessary and sufficient conditions of similarity of two idempotent matrices are proved, the idempotency of linear combinations of two idempotent matrices is discussed.

摘要证明数域上两个同阶幂等阵相似的充要条件是它们有相同的秩；给出幂等阵的相似标准型；讨论两个幂等阵的线性组合仍是幂等阵的充要条件。

The concepts of indecomposable matrices and fully indecomposable matrices over a distributive lattice L are introduced, and some algebraic properties of them are obtained.

引配格上不矩阵与完全不矩阵的概念,并获得它们的一些代数性质.

One kind of inverse eigenvalue problems, whose solutions are required to be normal or diagonalizable matrices, is investigated in quaternionic quantum mechanics.

摘要本文研究四元数量子力学中一类要求其是正规或对角化四元数矩阵的特征值反问题。

The tripeptide Arginyl-Glycyl-Aspartic acid (RGD) is a common cell recognition site of many adhesive proteins contained in extracellular matrices and in the blood .

RGD三肽（精氨酰-甘氨酰-天冬氨酸）序列是细胞外基质及血液中的许多粘附蛋白共有的细胞识别位点。

In the practical applications of highly nonnormal matrices, these theorems may be more useful than their generalized eigenvalue special cases and may provide more descriptive information.

在对高度非正规矩阵的研究应用中，这些定理将比它们的特例-广义特征值定理更靠，能提供更多的信息。