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Discrimination of Handlebar Grip Samples by Fourier Transform Infrared Microspectroscopy Analysis and Statistics
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作者 Zeyu Lin Bing Li +2 位作者 Ran Du ziwei wei Yuanfeng Wang 《Journal of Forensic Science and Medicine》 2017年第2期63-67,共5页
In this paper,the authors presented a study on the discrimination of handlebar grip samples,to provide effective forensic science service for hit and run traffic cases.50 bicycle handlebar grip samples,49 electric bik... In this paper,the authors presented a study on the discrimination of handlebar grip samples,to provide effective forensic science service for hit and run traffic cases.50 bicycle handlebar grip samples,49 electric bike handlebar grip samples,and 96 motorcycle handlebar grip samples have been randomly collected by the local police in Beijing(China).Fourier transform infrared microspectroscopy(FTIR)was utilized as analytical technology.Then,target absorption selection,data pretreatment,and discrimination of linked samples and unlinked samples were chosen as three steps to improve the discrimination of FTIR spectrums collected from different handlebar grip samples.Principal component analysis and receiver operating characteristic curve were utilized to evaluate different data selection methods and different data pretreatment methods,respectively.It is possible to explore the evidential value of handlebar grip residue evidence through instrumental analysis and statistical treatments.It will provide a universal discrimination method for other forensic science samples as well. 展开更多
关键词 Evidential value Fourier transform infrared microscpectroscopy handlebar grip sample principal component analysis receiver operating characteristic
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