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1·Compared with the evaluation method of entropy and joint entropy, it was shown that mutual information was a good evaluation criterion.

通过将它与采用熵和联合熵的评价方法相比较，实验结果表明交互信息量是一种很好的评价方法。

2·Information entropy theory was introduced into this paper, and multi-joint entropy was used to depict the aero-engine's disorder parameter and evolutive trend.

本文引入了信息熵理论，用多元联合熵来刻画航空发动机的有序性和演化方向。