浅谈二维条形码及其检验

条形码是国际上通行的防伪措施之一。中国加入WTO后,二维条形码在经济领域必将得到更为广泛的应用,同时也成为潜在的被伪造对象。本文通过对条形码知识的介绍,提出了条形码检验研究的必要性和基本操作方法。     

高校社科学报编排常见问题分析

《中国高等学校社会科学学报编排规范(修订版)》已印发执行了五年,高校社科学报基本实现了编排规范化,促进了社科文献在网络环境下的快速交流与传播。但有些社科学报在实施编排规范过程中还存在摘要撰写、关键词标引、正文标题层次、参考文献著录等不规范、不统一等问题,影响了学报质量和计算机检索。编辑应提高编排规范意识,在实践中提高和完善学报编排规范化、标准化。     

基于过程解析法的同机添加打印文件鉴别方法

利用喷墨打印机二次添加打印,特别是同机添加打印变造文件,是文件检验工作中的难题。喷墨打印机采用串行接字方式,内部结构复杂,喷嘴数目多,同一型号打印机又有多种质量模式。因此,在打印图文上往往留有较多的打印特征,如对接重叠线、对接错位线、横向白线、卫星墨点、墨点错位等。分析爱普生、惠普、佳能三个品牌的20台喷墨打印机不同质量模式的打印文件,发现这些特征重复再现频率较高,不同台打印机打印文件特征差异较大,同一台打印机在不同质量模式下特征出现的位置也不尽相同。通过提取打印文件上的打印特征,分析字车运行方向和打印图文pass数值,分解打印过程并制作检验图谱,判断打印文件的可疑区域是否符合打印规律,为确定二次添加打印提供帮助,提升检验过程的规范性、检验意见的准确性和结果依据的可读性。     

Forensic investigation framework for the document store NoSQL DBMS: MongoDB as a case study

The NoSQL DBMS provides an efficient means of storing and accessing big data because its servers are more easily horizontally scalable and replicable than relational DBMSs. Its data model lacks a fixed schema, so that users can easily dynamically change the data model of applications. These characteristics of the NoSQL DBMS mean that it is increasingly used in real-time analysis, web services such as SNS, mobile apps and the storage of machine generated data such as logs and IoT (Internet of Things) data. Although the increased usage of the NoSQL DBMS increases the possibility of it becoming a target of crime, there are few papers about forensic investigation of NoSQL DBMS.In this paper, we propose a forensic investigation framework for the document store NoSQL DBMS. It is difficult to cover all of the NoSQL DBMS, as 'NoSQL' includes several distinct architectures; our forensic investigation framework, however, is focused on the document store NoSQL DBMS. In order to conduct an evaluative case study, we need to apply it to MongoDB, which is, a widely used document store NoSQL DBMS. For this case study, a crime scenario is created in an experimental environment, and then we propose in detail a forensic procedure and technical methods for MongoDB. We suggested many substantial technical investigation methods for MongoDB, including identifying real servers storing evidences in a distributed environment and transaction reconstruction method, using log analysis and recovering deleted data from the MongoDB data file structure.     

论侦查文书中犯罪事实的写作

犯罪事实的写作作为公安机关侦查文书的重要组成部分,应严格按照犯罪构成要件简明扼要叙述,做到条理清楚,层次分明,语言规范,尽量使用法律术语。     

大学英语写作教学的探索与思考

大学英语教学中,写作教学是一个薄弱环节。如何改进写作教学方法,提高学生写作水平,一直是大学英语教学的一个难题。大学英语教师应正视现实,在教学实践中,不断改进教学方法及教学观念,从根本上重视英语写作教学,提高学生整体水平,实现跨文化交际的大学英语教学目标。     

Room of One's Own: 1920s Feminist Utopias

Virginia Woolf's aspiration in A Room of One's Own (1929) for a private space and independence for the 'uneducated' women who would write fiction was echoed in Jipping Street (1928), the fictional autobiography of the working-class Kathleen Woodward, as well as by numerous other women during the period. This article asks why this wish for a room emerged in the twenties, and what is shows about the political affect of feminism at that time. One of the effects of post-suffrage feminism was that working-class women's experience began to be not only observed but listened to, written down and published, but real changes in the legal and economic position of women only came slowly. Both Woolf's polemic and Woodward's fictional autobiography are diatribes against poverty and laments for women's wasted lives. Neither idealized suffering; poverty in their texts was an injustice that aroused anger, not a state of abjection or redemption which required an anguished identification. When these two books were published, just after women's suffrage was achieved, hopes were high. The thirties were a more brutal decade, with unemployment and the growth of fascism, and Woolf's Three Guineas (1938) is darker in tone. Neither Woolf nor Woodward had faith in conventional politics. Instead both writers chose silence, solitude and the aesthetic seduction of words and thoughts. Neither wanted to enter the world of men, but nor did they want to live lives like their mothers. Both these books require of women an inner change. The room represents a transitional space. There was no clear vision of the future yet. As so often with feminist thought, the wish is for a break with the past, a resistance to culture and a change in human nature.     

通过辨别、对比和检验材料中的变化测定文件日期

对一份文件最早制成时间的检验一直以来都是全世界文检界的难题之一。核实可疑文件的制成时间没有统一的方法,目前主要通过对纸张、墨迹、打字机、复印机、打印机、传真机、印刷品,以及笔迹和签名等因素的检验来确定一份文件的制成时间。文件检验人员需要充分利用他们手中的文件的内容及文件周边信息所反映出来的条件和材料,进而得出结论。     

Applicability of Latent Dirichlet Allocation to multi-disk search

Digital forensics practitioners face a continual increase in the volume of data they must analyze, which exacerbates the problem of finding relevant information in a noisy domain. Current technologies make use of keyword based search to isolate relevant documents and minimize false positives with respect to investigative goals. Unfortunately, selecting appropriate keywords is a complex and challenging task. Latent Dirichlet Allocation (LDA) offers a possible way to relax keyword selection by returning topically similar documents. This research compares regular expression search techniques and LDA using the Real Data Corpus (RDC). The RDC, a set of over 2400 disks from real users, is first analyzed to craft effective tests. Three tests are executed with the results indicating that, while LDA search should not be used as a replacement to regular expression search, it does offer benefits. First, it is able to locate documents when few, if any, of the keywords exist within them. Second, it improves data browsing and deals with keyword ambiguity by segmenting the documents into topics.