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It is represented that the coherent structures and intermittency are identified by multi-scale flatness factor based on locally averaged velocity structure functions. 利用子波系數(shù)的瞬時強(qiáng)度因子、瞬時平坦因子和平坦因子檢測平板湍流邊界層中的多尺度相乾結(jié)搆。