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。

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Based on fuzzy set theory target recognition method, through CCD image collection, the difference between target and bullet track gradation were used to evaluate the firing grade.

基于模糊集理论目标识别方法，通过CCD图像采集，利用目标与弹迹灰度的不同，对射击成绩进行评价。

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According to the experiments and theory analysis of the crackle on the glass by bullet hitting, we get the relationship between the glass crackle and the distance of shooting.

通过对枪弹撞击玻璃所产生的破碎裂纹进行了理论分析及实验，得出了玻璃袭纹与射击距离的关系。

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