Extending WHIRL with background knowledge for improved text classification

Intelligent use of the many diverse forms of data available on the Internet requires new tools for managing and manipulating heterogeneous forms of information. This paper uses WHIRL, an extension of relational databases that can manipulate textual data using statistical similarity measures developed by the information retrieval community. We show that although WHIRL is designed for more general similarity-based reasoning tasks, it is competitive with mature systems designed explicitly for inductive classification. In particular, WHIRL is well suited for combining different sources of knowledge in the classification process. We show on a diverse set of tasks that the use of appropriate sets of unlabeled background knowledge often decreases error rates, particularly if the number of examples or the size of the strings in the training set is small. This is especially useful when labeling text is a labor-intensive job and when there is a large amount of information available about a particular problem on the World Wide Web.

独立学院大学英语写作教学现状的调查与思考

针对独立学院大学英语写作教学现状,对来自甘肃省3个独立学院361名学生和33名教师进行了抽样问卷调查和半结构访谈.调查发现,学生英语写作主要以语篇结构性差、句法问题突出和词汇"窄式"记忆为主要特点,而大学英语精读课缺乏语篇教学与语法概念的弱化、写作教学中错误反馈和纵向监控乏力是其主要原因.独立学院只有在实际教学中通过强化语篇教学与语法教学、详尽反馈写作错误并对学生的写作能力实施纵向监控才能改善现状,促进自身大学英语写作教学的健康发展.     

重复效应对英语专业学生写作能力的影响

近年来重复效应在国内外得到了二语习得界不少学者的关注,同时这一效应被证实有助于学习者的二语学习。本研究以实证研究的方法,在Levelt(2008)的言语产出模式的框架下,以Van Patten(1996)的信息处理理论以及Skehan(1998)的双模式系统为理论基础探索重复效应对大学英语专业学生写作水平的影响。结果发现:重复对学习者写作的流利性和准确性都有显著的促进作用,但其复杂性没有得到显著的提高;重复对学习者写作流利性的促进作用在新任务中得到了迁移。     

马克思主义哲学视角下的语篇语言学

语篇语言学又称话语语言学,兴起于20世纪70年代,是现代语言学的重要分支之一,它的诞生与发展,使语言学的研究脱离了形式一逻辑的固有模式,从语言的本质出发去研究语言的基本规律。语言学的这个进步,反映了语言学家们从哲学层面对语言的重新审视,不再把语言看作是一成不变的形式化的内容,而是从语言作为人类的交际手段这一基本属性的角度来研究语言本身。从马克思主义哲学的视角来审视语篇语言学的诞生、研究对象和研究方法,无疑能够更好地探究语篇语言学的哲学基础。     

对我国少数民族学生汉语写作研究发展的调查和思考

考察和分析了1980-2012年间“中国期刊全文数据库”所刊载的中国少数民族学生汉语写作研究论文历时性发展进程,旨在了解当前国内对中国少数民族学生汉语写作相关研究的发展脉络、研究内容和特点,通过查漏补缺,为今后国内对少数民族学生汉语写作研究提供参考依据。     

文学与文章--韩国高校写作教学一瞥

韩国高校的写作教学主要包括两大领域:以文学为对象的写作和以文章为对象的写作。前者所包括的诗文及小说创作的教学模式深受中国古代诗文及小说创作的影响;而后者的涵盖范围较广,包括各种实用性文章写作以及专业学术科研论文写作。     

Authorship attribution based on a probabilistic topic model

This paper describes, evaluates and compares the use of Latent Dirichlet allocation (LDA) as an approach to authorship attribution. Based on this generative probabilistic topic model, we can model each document as a mixture of topic distributions with each topic specifying a distribution over words. Based on author profiles (aggregation of all texts written by the same writer) we suggest computing the distance with a disputed text to determine its possible writer. This distance is based on the difference between the two topic distributions. To evaluate different attribution schemes, we carried out an experiment based on 5408 newspaper articles (Glasgow Herald) written by 20 distinct authors. To complement this experiment, we used 4326 articles extracted from the Italian newspaper La Stampa and written by 20 journalists. This research demonstrates that the LDA-based classification scheme tends to outperform the Delta rule, and the χ² distance, two classical approaches in authorship attribution based on a restricted number of terms. Compared to the Kullback–Leibler divergence, the LDA-based scheme can provide better effectiveness when considering a larger number of terms.     

基于粗集的支持向量机文本分类方法研究

本文提出了一种基于粗糙集的支持向量机文本分类方法。该方法利用粗糙集的约简理论降低了支持向量的维数,同时保证了分类性能。实验表明该方法能获得较好的分类效果。     

一种基于特征编码的Word文档数字水印算法

本文基于文本数字水印的特征编码思想,通过设置Word文档中字符的下划线格式以嵌入和检测水印。实验表明,该算法有较强的不可见性,能较好的嵌入和检测水印,从而达到数字水印的一般要求。     

从高职英语专业毕业论文现状反思英语写作课教学

毕业论文是学生多年习得的专业知识和学术理念的精华体现,但其现状不尽如人意。文章列举并归纳了历届毕业生毕业论文中出现的写作问题,分析了现状成因,反思了英语写作课教学,提出其定位和常用的训练方法。