The paper deals with the microstructrures and hight-temperatrure hardness of highchromium white cast iron with the austenitic and sorbitic matrices.

本文主要论述了以奥氏体及索氏体为基体的高铬白口铁的高温硬度。

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

摘要证明了数域上两个同阶幂等相似的充要条件是它们有相同的秩；给出了幂等的相似标准型；讨论了两个幂等的线性合仍是幂等的充要条件。

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（精酰-甘酰-天冬）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-广义特征值定理更可靠，能提供更多的信息。

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

摘要本文研究了四元数量子力学中一类要求其解是正规或可对角化四元数矩的特征值反问题。