本文以生物的共生演化理论为隐喻，对企业多元化战略的演进脉络进行了映射分析。

This paper takes the biological symbiosis evolution theory as the metaphor and it, carried on the mapping analysis to the enterprise multiplication strategy.

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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。

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.

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