通过将该半解析解与忽略扩散的数值解进行对比分析，讨论了数值弥散代替物理扩散的条件。
Then this paper studied the effect of diffusion coefficient on concentration distribution and the conditions of substitution with numerical dispersion for physical diffusion.
在井巷紊流传递过程中，纵向弥散系数远远大于紊流扩散系数。
In mine mass transfer the longitudinal dispersion coefficient is by far greater than the turbulent diffusion coefficient.
磁共振扩散加权与弥散张量成像作为磁共振成像新技术已经应用于临床。
As new technologies of magnetic resonance imaging, diffusion weighted imaging (DWI) and diffusion tensor imaging (DTI) have been applied in clinical diagnosis.
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