The occurrence degree and the management levels present negative relativity.
病害的发生程度与经营水平呈负相关性。
Moreover, the relativity is large between poverty degree distribution and region location. City urbanization and traffic condition have great effect on the regional poverty degree.
贫困度分布与区位相关性大，城镇交通对贫困度辐射带动作用较强。
The methodology is to use the information entropy to measure the risk degree of complex engineering system, and evaluate its relativity with information density evolution.
为提高复杂工程系统的风险评估和计算效率，对工程系统中复杂性和信息密度演化进行研究。
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