Abstract: To determine the formation time of a document remains the most controversial and challenging problem in questioned document examination, especially to date the document quantitatively by utilizing the elements in the document that correlate with time. Through a case of determining the stamped date of the impression on a questioned document, this paper discusses how to use statistical methods to relate the phase change features of stamp impressions with time quantitatively. It not only offers a quantitative analysis method for dating stamp impressions, but also provides a study approach for similar problems in dating of questioned document with statistics.

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摘要：  文件形成时间的鉴定问题一直是文书鉴定领域最具争议和挑战的疑难问题，尤其是如何利用文件要素与时间的关系，定量分析判断文件的形成时间。通过对一起印章印文盖印时间鉴定的实际案例，探讨了如何运用统计学方法定量分析印章印文阶段性特征中的定量特征与印文盖印时间之间关系，为印章印文盖印时间鉴定提供一种定量分析的方法，也为如何进一步运用统计学方法定量分析文件形成时间的类似问题提供了一种研究思路。

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