Analysis of the particle velocity distribution and the gas-solid hydrodynamics indicate that the scale of inner particle circulation is crucial in determining the mixing pattern within the beds.
颗粒速度分布和气固流动特性分析显示，内部颗粒循环尺度是影响床内混合方式的重要因素。
A decision analysis pattern and a criterion on suitable scale are posed. At last, a research, case is given.
提出了一个决策分析模式和一个适度规模的判别准则，并给出了一个案例。
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