This paper shows some properties and traditional making techniques of metal-based FGM, and their limitation.
本文综述了金属基功能梯度材料的特性和传统制备工艺，总结了其不足和缺陷。
This paper shows some new methods just like residual flow increment, signal tracking, traveling wave, transient state and complex selection.
本文列举了适用于谐振接地系统的各类新兴方法。如残流增量法、注入信号寻迹法、行波法、暂态法以及综合选线法。
This paper shows some simple methods to calculate the powers of A using the characteristic matrix decomposition and the elementary row operation.
本文给出用特征矩阵分解与初等行变换求A的一系列幂的简捷方法。
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