足迹推断年龄常用方法实用性的比较研究

A Comparative Study on the Common Methods of Age Estimation of Footprints

目的利用踏痕和前掌重压面压痕推断年龄方法在基层办案实践中最为常用,但是该两种方法推断出的结果常存在偏差,无法界定哪种推断方法更为准确可靠。对两种方法进行相关性和系统性论证,以达到在实践中选择最优的足迹推断年龄方法的目的。方法采集253枚年龄在18~60岁的平面皮鞋印样本。通过实验测试、数据处理、结果分析,利用踏痕和前掌重压面压痕分别推断不同年龄段的平面皮鞋印足迹,基于Minitab统计软件,利用数理统计方法对实验数据结果进行统计分析。结果在不同的年龄段,踏痕推断法和前掌重压面压痕推断法的准确性和稳定性均存在一定差异。结论踏痕推断法更适合于青年时期,前掌重压面压痕和踏痕综合推断法更适合于壮年时期,前掌重压面压痕推断法相对适合于中年时期。

Objective The tread marks and the indentations of forefoot stress surface are commonly used for age estimation in grass-root practice.However,the results obtained by these two methods often have deviations,so it is impossible to define which method is more accurate and reliable.In order to select the best method of age estimation in practice,correlation and systematic demonstration of the two methods are carried out.Method The 253 samples of flat leather shoe prints aged 18-60 were collected.Through experimental verification,data processing and results analysis,and by using tread marks and indentations of forefoot stress surface,the age groups of the flat leather shoe samples were inferred.Based on the Minitab statistical software,the results of experimental data were statistically analyzed by mathematical statistics.Results The accuracy and stability of the tread mark inference method and indentation of forefoot stress surface inference method were different in different age groups.Conclusion The tread mark inference method is more suitable for the young people.The indentations of forefoot stress surface inference method is suitable for middle age people.