Objective To investigate the relationship between diffusion time and diffusion tensor-derived parameters.

目的研究扩散张量导出量与扩散时间的关系。

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Characteristic nucleation time and characteristic diffusion time were employed to judge the controlling factor of the nucleation process.

提出采用特征成核时间和特征扩散时间，判定反应沉淀过程的成核控制因素。

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The ratio of the square of certain concentration gas diffusion depth and diffusion time is constant when it diffuses and reacts through the solids bed.

一定浓度的气体通过固体颗粒层扩散-反应时，其扩散深度的平方与扩散时间的比值为常数。

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Researchers at 11 institutions are mapping the largest conduits among brain regions by combining four imaging techniques, including a new method called diffusion magnetic-resonance imaging that allows researchers for the first time to accurately map the white matter of nerve fibers.

WSJ: Probing the Brain's Mysteries