气固流化床内一般处于非均匀的聚式流化状态，系统中颗粒和流体分离严重，呈现流体密集的稀相和颗粒聚集的密相共存的两相结构。床内的颗粒流体两相流的主要特征在于其非均匀的两相时空动态结构，该系统在大多数的情况下处于非线性、非平衡的状态，是一种典型的耗散结构［１］。本文介绍应用小波分析技术对流化床中瞬态颗粒浓度信号进行分析，以揭示这种结构的本质特性。 The gas-solid fluidized bed is generally in a non-uniform, cohesive, fluidized state where particles and fluids are severely separated and present a two-phase structure in which a fluid-dense dilute phase and a densely packed dense phase coexist. Particle fluid two-phase flow in bed is characterized by its non-uniform two-phase space-time dynamic structure, which in most cases is in a non-linear and unbalanced state and is a typical dissipative structure [1] . This article describes the application of wavelet analysis of fluidized bed transient particle concentration signal analysis to reveal the nature of this structure.