采用斜向差分算子，建立斜向隐式差分格式，再结合边界条件，对扩散方程进行求解。
Based on the skew direction difference operator, the implicit skew difference schemes were constructed, and the boundary condition was unified, to solve the diffusion equation.
选用三种颗料状物料，在四种不同倾斜度的斜管中测定了不同负压差和固体流率条件下的气体流率。
The experimental data of gas flow rate in the bed with four slant angles and three kinds of particle materials are obtained.
推导出斜坐标系下，亥姆霍兹方程的五点差分格式；
The five-grid difference format of Helmholtz equation in slanting coordinate have been derived.
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