共查询到19条相似文献,搜索用时 484 毫秒
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变造是指对既存文书证明事项的本质部分加以改变的行为.变造包括有形变造和无形变造.伪造与变造的区别在于所制作出来的东西与以前文书是否具备同一性.我国刑法中的变造应解读为在于是否对文书的本质部分作了改变. 相似文献
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一种发现高锰酸钾涂改痕迹的化学检测方法 总被引:2,自引:0,他引:2
目的通过检测文书可疑涂改处的化学成分,确定其涂改变造性质。方法无损复写取样方法,锰离子定性检验方法。结果可快速检测高锰酸钾涂改文书。 相似文献
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伪造、变造、异常处理文书的书写时间鉴定在诉讼中的作用越来越重要。笔者在多年的文书鉴定工作中曾遇到多起特殊处理的文件,如人为老化文件、塑封文件,污染文件以及书写于传真纸、宣纸等特定材料上的文件,在对这些文件的检验过程中,笔者进行了部分研究,获得一些实际体会。 相似文献
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票据变造作为票据实践中的突出现象 ,客观上要求对其构成要件、法律效果和付款责任加以清楚的界定。本文通过学说考辨和实务分析 ,明确提出票据变造之二构成要件说 ,并据此详细论述了票据变造的积极效果和消极效果 ,票据变造之付款与损失之负担等相关问题 相似文献
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本文主要探讨两次打印文书的检验鉴定问题。在日常文检鉴定实践中。此类案件实属罕见。其鉴定难度较大。是文检人员面临的新课题。通过计算机设定增加打印字迹内容。属于一种高智能的添加字迹手段。其隐蔽性较强。作者通过对计算机及打印机的工作原理。结合案件思考、研究了两次打印文件的检验方法。并积累了一定的鉴定经验。写此文章目的在于帮助、引导文检工作者分析一份文书是否两次打印解决一些问题。或许能起到抛砖引玉的作用。 相似文献
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近几年来,在文件鉴定过程中涉及变造文件鉴定的案件数量呈逐年上升趋势,越来越引起广大文检工作者的重视。文件物证的变造事实不仅具有一定的隐蔽性,发现难度大;而且对变造文件的检验需要进行综合性、系统性分析,检验难度也大。本文作者结合自己多年的检案实践,总结了检验变造文件的一些经验与体会,以期供广大同行共同研究探讨。 相似文献
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目的研究富士施乐C4300彩色激光打印复印一体机形成文件的跟踪暗码,对富士施乐C4300彩色激光打印复印一体机形成文件进行识别。方法使用多光谱成像仪对6台富士施乐C4300彩色激光打印复印一体机形成的文件进行观察。结果该6台机器形成文件的跟踪暗码存在特征差异。结论通过跟踪暗码的差异,能够对富士施乐C4300彩色激光打印复印一体机形成文件进行识别。 相似文献
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三维立体显微镜在文件检验中的应用 总被引:4,自引:1,他引:3
目的通过应用先进的仪器设备,让我们从另一个角度观察文检痕迹特征,寻找到一个文件检验的新视角。方法利用三维立体显微镜,从微观的三维状态下分析文检的痕迹特征(上下位置)。结果能有效区别笔迹书写与印章的先后顺序;打印字迹和印章的先后顺序,同一支笔书写形成的交叉笔划的先后顺序;准确区别打印文书和复印文书等。结论借助三维立体显微镜,能使文件检验水平向前迈进一步。 相似文献
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Szafarska M Wietecha-Posłuszny R Woźniakiewicz M Kościelniak P 《Forensic science international》2011,212(1-3):78-85
In the process of questioned document examination, the discrimination of inkjet printing inks is becoming more necessary due to increasingly frequent counterfeiting of documents printed by inkjet printers. Therefore, a method based on micellar electrophoretic capillary chromatography (MECC) has been developed and applied to analysis of such inks extracted from paper. With the use of an optimized and validated analytical procedure, multielectropherograms of inks taken from various models of printers made by various producers (Hewlett-Packard, Epson, Brother, Lexmark and Canon) were created. It was shown that effective differentiation of individual inks was possible in terms of migration time, order and specific shapes of characteristic peaks. By comparison of recorded UV-Vis spectra, the identification of main dyes was also achievable. The usefulness of the method was confirmed by an intralaboratory test of utility, in which several forged printouts were successfully examined. The obtained results proved that the proposed procedure is a useful tool that could be applied to ink discrimination and group identification of dyes originating from inkjet printing inks. Consequently, the developed method can be applied in the forensic field, including investigation of the authenticity of documents. 相似文献
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通过对传真机工作原理和性能的分析,判断传真文件痕迹特征的形成方式和过程,对传真文件检验的方法和技术进行系统研究,归纳出传真文件检验的要点,并提出了制定传真文件检验标准的必要性和可行性。 相似文献
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介绍了利用数字图象处理技术剪贴伪造文件、变造签名、彩色打印伪造原始印文和签名等三种伪造文件的方法及其特点.数字图象处理技术能够克服许多传统伪造方法的"缺点",使伪造的文件达到较高的逼真度.讨论了数字图象处理技术的滥用引发的新问题. 相似文献
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Gerald M. LaPorte M.S.F.S. Joseph C. Stephens M.S.F.S. Amanda K. Beuchel M.S.F.S. 《Journal of forensic sciences》2010,55(1):136-140
Abstract: The examination of printing defects, or imperfections, found on printed or copied documents has been recognized as a generally accepted approach for linking questioned documents to a common source. This research paper will highlight the results from two mutually exclusive studies. The first involved the examination and characterization of printing defects found in a controlled production run of 500,000 envelopes bearing text and images. It was concluded that printing defects are random occurrences and that morphological differences can be used to identify variations within the same production batch. The second part incorporated a blind study to assess the error rate of associating randomly selected envelopes from different retail locations to a known source. The examination was based on the comparison of printing defects in the security patterns found in some envelopes. The results demonstrated that it is possible to associate envelopes to a common origin with a 0% error rate. 相似文献