The wavelet multi-analysis is adopted to further understand the microstructure of solids holdup fluctuation, The vivid fingermark images show that it is a fractal and dissipative structure.

• 小波多分辨分析法得到指纹图形象地揭示了颗粒浓度脉动的自相似、分叉等具有混沌特征的微观结构；