共查询到13条相似文献,搜索用时 62 毫秒
1.
2.
3.
在法医检案实践中,涉枪案件屡见不鲜,在国内较多见的是制式猎枪案例。以顺义地区为例,统计1998年~2001年间涉枪案件有9起,其中8起为猎枪,所以研究猎枪霰弹损伤的射击距离推断尤为重要。我们用国产12#双立管及五连发制式猎枪以不同距离射击活犬,研究其创口特征随射击距离变化的关系,为推断制式猎枪的射击距离提供了客观的实验依据。1材料与方法1.1材料1.1.1实验武器选用国产12#双立管及五连发单管猎枪,均配用12#霰弹(弹杯均为有瓣)。1.1.2实验动物选用活犬20只,雄雌随机,将动物分A、B两组,每组10只,射击前去掉腹部毛发并清洗… 相似文献
4.
目的利用环境控制扫描电镜/能谱仪(SEM/EDX)研究枪弹创射入口周围射击残留物与射击距离的关系,探讨其能否用于射击距离的判断。方法采用""5.4""式手枪分别在5、10、15、20、30、40、50、60、70、80、90、120cm处射击乳猪皮肤,利用SEM/EDX观察创口周围GSR的分布和成分,并建立回归方程。结果射击距离和GSR颗粒数量之间总体表现为直线关系,并建立了相应的回归方程。当射击距离为10~90cm时,用该方程推断射击距离效果较好。结论检测创口周围GSR可望用于判断“5.4”式手枪的射击距离。 相似文献
5.
当前我国的持枪犯罪率越来越高,这类犯罪的犯罪性质恶劣,社会危害大,严重影响着社会的安定与稳定,是各级公安机关重点打击的犯罪行为。因此,关于弹道检测等相关原理与应用的研究越来越受学者的关注。射击距离的判断对于分析案件的性质,作案过程的推断、确认射击位置和方式具有重要作用,也只有先确定了射击的距离才有可能进行下一步的数据计算。因此,如何推断射击距离,成为检验鉴定枪击案件的首要问题。因此,本文位从检测射击残留物对射击距离的判断展开论述。 相似文献
6.
目的研究92式手枪射击距离与射击残留物分布密度的相关性,为射击距离的推断提供依据。方法选择92式手枪,在带皮的猪肉上覆盖白色棉布,设计了0m,0.1m,0.2m,0.5m,1.0m,1.5m,3.0m,5.0m,10m,15.0m,20.0m,25.0m共12个距离进行射击,提取白棉布上的弹孔圆周和距弹孔2cm的圆周上的射击残留物,利用扫描电镜/能谱仪对不同射击距离遗留在白棉布上的射击残留物进行检验。结果白棉布上射击残留物分布密度与射击距离呈负相关的关系。结论根据棉布上射击残留物的分布密度,能够推断射击距离,对涉枪案件中射击距离的判断有一定的参考价值。 相似文献
7.
8.
9.
10.
射击距离判断是枪击犯罪现场重建关键环节,分析案情、缩小侦查范围有重要的现实意义。射击距离的精准度对于案件的侦破起着至关重要的作用,因此确定射击距离就显得尤为迫切。本文从枪支射击基本原理、枪弹创形成机理分析,结合痕迹学、法医学、微量物证等几方面来测算枪支射击距离。 相似文献
11.
The techniques of atomic force microscopy (AFM) and Fourier transform infrared attenuated total reflectance (FTIR/ATR) spectroscopy are applied to the analysis of gun-shot residue (GSR) to test their ability to determine shooting distance and discrimination of the powder manufacturers. AFM is a nondestructive technique that is capable of characterizing the shapes and size distributions of GSR particles with resolution down to less than a nanometer. This may be useful for estimation of the shooting distance. Our AFM images of GSR show that the size distribution of the particles is inversely proportional to the shooting distance. Discrimination of powder manufacturers is tested by FTIR/ATR investigation of GSR. Identifying the specific compounds in the GSR by FTIR/ATR was not possible because it is a mixture of the debris of several compounds that compose the residue. However, it is shown that the GSR from different cartridges has characteristic FTIR/ATR bands that may be useful in differentiating the powder manufacturers. It appears promising that the development of AFM and FTIR/ATR databases for various powder manufacturers may be useful in analysis and identification of GSR. 相似文献
12.
七七式手枪推弹突笋痕与发射顺序的研究 总被引:1,自引:4,他引:1
目的研究七七式手枪射击弹壳的排序,找出射击顺序之间的关系。方法通过已知顺序的实弹射击取样,用显微镜观察弹壳上连续射击过程中形成的推弹突笋痕迹,经过统计、归纳,从中发现与射击顺序之间的关系。结果根据弹壳底面的推弹突笋痕迹变化规律判断出七七式手枪发射子弹的顺序。结论为指导涉枪案件的检验鉴定提供依据。 相似文献
13.
Coumbaros J Denman J Kirkbride KP Walker GS Skinner W 《Journal of forensic sciences》2008,53(2):312-320
Advances in the technology employed for the manufacture of glass have resulted in a final glass product with little variability in terms of its physical and optical properties. For example, the refractive index of Australian float glass tends to lie between 1.5189 and 1.5194. It has therefore become necessary to complement physical and optical methods for forensic glass comparison with instrumental elemental analyses. In a previous study, time-of-flight secondary ion mass spectrometry has been shown to offer potential for the analysis of glass particles as small as a few tens of microns across. In this study, the three-dimensional homogeneity of a sheet of float glass is described, and consequences for forensic elemental analysis of glass particles of such size are explored. Variation in Si, Ca, Mg, and Na levels immediately under the nonfloat surface was observed, with the variance accompanied by a decrease in refractive index. 相似文献