景观指数是指能够浓缩景观信息，反映其结构组成和空间配置某些方面特征的简单定量指标。
Landscape index is a sort of simple quantitative index that can concentrate landscape information and reflect the structure and characteristic.
管道泄漏声发射信号既携带结构的某些特征信息（泄漏孔大小和位置等） ，同时又有很大的随机性和不确定性，属于一种非平稳随机信号。
The AE signals of pipeline leak carry the information of structure integrity (the dimension and location of leak), which are random and uncertain, and belong to non stationary signals.
管道泄漏声发射信号既携带结构的某些特征信息（泄漏孔大小和位置等） ，同时又有很大的随机性和不确定性，属于一种非平稳随机信号。
The AE signals of pipeline leak carry the information of structure integrity (the dimension and location of leak), which are random and uncertain, and belong to non stationary signals.
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