排序方式： 共有276条查询结果，搜索用时 15 毫秒
21.
Chun-Yan Liang Li GuoZhao-Jie Xia Feng-Guang NieXiao-Xia Li Liang SuZhang-Yuan Yang 《Information processing & management》2006
A new dictionary-based text categorization approach is proposed to classify the chemical web pages efficiently. Using a chemistry dictionary, the approach can extract chemistry-related information more exactly from web pages. After automatic segmentation on the documents to find dictionary terms for document expansion, the approach adopts latent semantic indexing (LSI) to produce the final document vectors, and the relevant categories are finally assigned to the test document by using the k-NN text categorization algorithm. The effects of the characteristics of chemistry dictionary and test collection on the categorization efficiency are discussed in this paper, and a new voting method is also introduced to improve the categorization performance further based on the collection characteristics. The experimental results show that the proposed approach has the superior performance to the traditional categorization method and is applicable to the classification of chemical web pages. 相似文献
22.
Wanpeng Song Liu Wenyin Naijie Gu Xiaojun Quan Tianyong Hao 《Information processing & management》2011
Question categorization, which suggests one of a set of predefined categories to a user’s question according to the question’s topic or content, is a useful technique in user-interactive question answering systems. In this paper, we propose an automatic method for question categorization in a user-interactive question answering system. This method includes four steps: feature space construction, topic-wise words identification and weighting, semantic mapping, and similarity calculation. We firstly construct the feature space based on all accumulated questions and calculate the feature vector of each predefined category which contains certain accumulated questions. When a new question is posted, the semantic pattern of the question is used to identify and weigh the important words of the question. After that, the question is semantically mapped into the constructed feature space to enrich its representation. Finally, the similarity between the question and each category is calculated based on their feature vectors. The category with the highest similarity is assigned to the question. The experimental results show that our proposed method achieves good categorization precision and outperforms the traditional categorization methods on the selected test questions. 相似文献
23.
文本分类是处理和组织大量文本数据的关键技术之一。为了更加有效地实现文本分类,本文提出了一种基于图模型的文本特征提取方法。该方法利用类别信息在训练数据集上构造邻接带权图及其补图,使得属于同一个类别的样本点的投影尽可能近,不属于同一个类别的样本点的投影尽可能远。这种方法既能够获得文本空间的全局结构信息又可以保留局部结构信息。最后,采用K近邻分类器在20Newsgroups标准数据集上进行训练和测试,并且与基于潜在语义索引的文本分类方法做了比较,文本分类的性能得到很大提高。实验结果表明,本文所提出的方法能够有效地提高文本分类的性能。 相似文献
24.
宫媛 《新疆教育学院学报》2010,26(1):104-108
文章借鉴范畴化理论相关内容,在徐思益先生语言理论的基础上,对语境整体作了系统、简明地概括。将语境概括为语义语境与语用语境两大核心范畴,语用语境分为必要语境与特定语境,必要语境是典型成员,特定语境是其延伸。 相似文献
25.
刘世理 《信阳师范学院学报(哲学社会科学版)》2006,26(2):90-93
范畴化是人类认识客观世界的认知基础,范畴化过程中既形成原型范畴又形成文化定势。因此人类对意义的认知与原型、定势都有关。原型被称为是一类事物中的“最佳样板”,是人类对意义认知的基础和核心部分,有助于我们对意义的认知范畴化。而文化定势是人类思想范畴化的一种复杂形式,它局限于特定社会中的人群,使他们对意义的认知在主观上产生固化。如果用认知的观点审慎地看待范畴,就会发现原型是人的思想表现的认知参照点。所以对不同语言社团的人来说,同一范畴中意义的认知可能会产生变异。 相似文献
26.
27.
杨德峰 《暨南大学华文学院学报》2008,(1):46-52
本文对《汉语水平词汇与汉字等级大纲》中的33个程度副词修饰谓词性成分形成的结构带“的”情况进行了详细考察,发现“程度副词＋谓词性成分”能带“的”的有两种情况,一种是带“的”以后是自由的,另一种是带“的”以后是粘着的,绝对程度副词修饰谓词性成分形成的结构带“的”一般是粘着的,相对程度副词修饰谓词性成分形成的结构带“的”一般是自由的。文章认为“程度副词＋谓词性成分＋的”的语法功能存在着范畴化现象。 相似文献
28.
揭示了认知语言学的范畴化理论对构建法律术语的作用,同时介绍了作为新范畴构建的重要方式的隐喻和转喻构建法律术语的几种方式。 相似文献
29.
30.
周芸 《楚雄师范学院学报》2006,21(7):21-27
艺术语言学是一门从艺术的角度研究语言的崭新的语言学分支学科。在当前语言学众多分支学科都呈现出活跃姿态的背景下,艺术语言学也需要通过不断更新学科观念和研究方法来推动自身的发展。本文试图通过对跨体式文学语言的分析,讨论艺术语言研究能否在延续思辨性研究的基础上,适当借鉴统计学实证性的研究方法;提倡艺术语言研究方法的多元化,对于进一步繁荣艺术语言学将是十分有利的。 相似文献