基于信息论，例举出了日常生活中的一些实例，体现出互信息原理在日常生活中的应用。
Based on information theory, some examples which reflect the principle of mutual information in daily life are given.
基于信息论的交叉熵原理提出状态-测试关联灵敏度指标，并给出计算方法。
Based on the cross entropy principle in information theory, a novel index named state-test association sensitivity index is proposed together with its calculating methods.
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