In chapter 4, the function analysis of passageway.
第4章通道的功能分析。
The clustering analysis of least distance method was applied, the results showed that types of the phytocoenosium are 4: high function, commonly function, low function and degenerative function type.
采用最小距离方法逐步聚类分析，对理水调洪型植被群落分为高功能理水调洪型、一般功能理水调洪型、低功能理水调洪型、功能退化型4个等级。
In chapter 4, we introduce the higher order statistic analysis theory and information theory related to ICA theory, the object function of ICA, and several representative optimizing algorithm of ICA.
第四章介绍了与ICA理论有关的高阶统计理论，信息论理论，ICA的目标函数以及几种典型的优化算法。
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