称重计数法计算气枪弹检材数量  

Weighing to Count the Quantity of Air Gun Pellets

作　　者：鲍立垠[1] 李轶昳[1] 张雯[2] 崔斌[1] 金益锋[1] 马新和[1] BAO Liyin;LI Yiyi;ZHANG Wen;CUI Bin;JIN Yifeng;MA Xinhe(Institute of Forensic Science,Ministry of Public Security,Beijing100038,China;College of Environment and Chemistry Engineering,Yanshan University,Qinhuangdao066004,Hebei,China)

机构地区：[1]公安部物证鉴定中心,北京100038 [2]燕山大学环境与化学工程学院,河北秦皇岛066004

出　　处：《刑事技术》2018年第6期436-440,共5页Forensic Science and Technology

基　　金：证据科学教育部重点实验室(中国政法大学)开放基金资助课题(No.2018KFKT06)

摘　　要：为解决涉枪物证检验鉴定中大批量气枪弹的计数问题,参照文献报道中有关称重计数的计算方法,建立气枪弹称重计数的方法。使用天平对气枪弹总质量进行称量,并从气枪弹中随机抽取2批各10发称量计算单发气枪弹质量,将总质量与单发气枪弹质量的商作为气枪弹数量,并将两次抽样称重的误差进行取合。从鉴定实际需要的角度,对称重计数法的可行性进行验证与讨论,并建立气枪弹称重计数的操作流程。Quantity determination is sometimes crucial for the gun-concerned evidence identifi cation when a large amount of air-gun pellets are involved.Referred to the literature reports about quantity calculation by weighing and counting,a method is here set up for counting air-gun pellets through weighing.The total mass of air-gun pellets is weighed with an eligible electronic balance.Two batches of samples are randomly selected to have their respective10air-gun pellets measured so as to get the average weight of one air-gun pellet.The quantity of air gun pellets is calculated through division of the total mass by the average weight of one pellet.The error is also estimated through combination of the results from the two batches of randomly selected samples.Orienting to the actual requirements of identifi cation,the above method is verifi ed and discussed on its feasibility along with the operational procedure being put up,plus the three ways of result-expression being shown with either the pellet amount or the error range or the quantity span.

关 键 词：物证鉴定 称重计数法 气枪弹 涉枪案件 

分 类 号：DF794.1[政治法律—诉讼法学]