The topography of bullet surface wear was studied by using fractal theory. The irregularity and random distribution of its surface wear show the fractal characteristics.
应用分形理论对弹头磨损表面形貌进行了研究，研究表明，其表面磨损形貌的不规则和随机分布性具有分形特征。
Using fractal theory as a theoretical tool, the changes of surface morphology of coal chars of four types of coal during low temperature combustion were studied by nitrogen adsorption.
以分形几何为理论工具，采用低温氮气吸附法，对四种煤在低温燃烧过程中表面形态变化作了考察。
The expansion mechanism of hardened cement paste with double expansion sources of entringite and brucite was studied by using theory of fractal geometry and viscoelasticity.
应用分形学与粘弹性力学对含钙矾石和水镁石膨胀源的水泥硬化浆体的膨胀机理进行了研究与分析。
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