Studies on calligraphy diffusion among regions.

书法地域空间扩散研究；

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In scientometrics field, however, there are few scholar studies about it, especially about knowledge production and diffusion in citation network.

然而，科学计量学领域中关于大型引文网络的研究还非常少，关于引文网络中知识生产和传播过程的研究更是少有涉及。

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This paper studies the change characteristics of gas diffusion coefficients of sandstone and mudstone by analyzing the factors influencing the gas diffusion coefficients.

通过分析地层剖面中砂泥岩天然气扩散系数的影响因素，研究了地层剖面中砂泥岩天然气扩散系数的变化特征；

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Recent genetic studies generally contradict an earlier theory held by some archeologists that farming spread by cultural diffusion.

WSJ: Migrations Spurred Agriculture Spread, Studies Indicate