图书馆光盘资源系统的网络管理与应用

针对如何科学而有效地管理图书馆光盘资源系统进行讨论,并就技术问题提出了三种解决方案随书光盘与书目信息一体化的网络管理,虚拟光盘的网络管理与应用系统,以FTP网站方式对光盘进行网络管理,以及一些自己在实际工作中对不同光盘资源系统进行管理的实践经验.     

Retrieving and classifying instances of source code plagiarism

Automatic detection of source code plagiarism is an important research field for both the commercial software industry and within the research community. Existing methods of plagiarism detection primarily involve exhaustive pairwise document comparison, which does not scale well for large software collections. To achieve scalability, we approach the problem from an information retrieval (IR) perspective. We retrieve a ranked list of candidate documents in response to a pseudo-query representation constructed from each source code document in the collection. The challenge in source code document retrieval is that the standard bag-of-words (BoW) representation model for such documents is likely to result in many false positives being retrieved, because of the use of identical programming language specific constructs and keywords. To address this problem, we make use of an abstract syntax tree (AST) representation of the source code documents. While the IR approach is efficient, it is essentially unsupervised in nature. To further improve its effectiveness, we apply a supervised classifier (pre-trained with features extracted from sample plagiarized source code pairs) on the top ranked retrieved documents. We report experiments on the SOCO-2014 dataset comprising 12K Java source files with almost 1M lines of code. Our experiments confirm that the AST based approach produces significantly better retrieval effectiveness than a standard BoW representation, i.e., the AST based approach is able to identify a higher number of plagiarized source code documents at top ranks in response to a query source code document. The supervised classifier, trained on features extracted from sample plagiarized source code pairs, is shown to effectively filter and thus further improve the ranked list of retrieved candidate plagiarized documents.     

硝化法合成邻硝基苯甲醛

通过硝化法合成邻硝基苯甲醛实验的比较，介绍A法的反应原理及实验。     

近三十年彝族宗教崇拜观念研究综述

本文对彝族原始宗教信仰崇拜观念的研究成果进行了简单的梳理，同时探讨了彝族原始宗教研究的问题与今后的发展方向。希望可以为广大学者们日后更好地研究彝族原始宗教信仰提供参考。     

实现马克思主义大众化的有效传播

努力提升传播方式的亲和力和感召力,是使马克思主义大众化获得最佳传播效果的重要因素.为此,我们要认真研究今天凸显的群体心理、分众特征和个性化趋势,着力实现有亲和力的传播;要高度关注今天受众的内在需求、情感取向和兴趣趋势,着力实现有感召力的传播.     

公共图书馆对城市边缘群体心理援助探索

公共图书馆是传播教育、文化和信息的一支有生力量,是促使人们寻找和平与精神幸福的基本资源.作者试图探索一些方法以帮助边缘群体克服他们的的心理问题.     

谈专升本高校图书馆的建设

我国高等教育发展迅速，一大批专科院校升格为本科，图书馆工作人员素质、馆藏图书量等方面都存在着不相适应的问题，应根据本科学校建立现代网络化、数字化、开放化图书馆的要求，采取相应对策，搞好这类高校的图书馆建设。     

职业教育精准扶贫路径探析

大力推进职业教育精准扶贫是实现脱贫攻坚战略目标的关键之举.文章对职业教育精准扶贫的内涵进行了解析,指出当前职业教育精准扶贫开发工作现状及存在的问题,指出了精准扶贫的有效路径,即精准发动宣传职业教育,转变贫困人口教育观念;优化职业教育培训体系,精准培养帮扶对象;以创新创业带动就业,促进贫困地区可持续发展;完善职业教育扶贫机制,提高精准扶贫效能.