arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 1408.6746cs.CLcs.LG
收藏

非标准词作为文本分类的特征

Non-Standard Words as Features for Text Categorization

University of Rijeka(里耶卡大学)

Slobodan Beliga, Sanda Martinčić-Ipšić

摘要:

本文提出了克罗地亚语文本分类使用非标准词(NSW)的功能。非标准词有:数字、日期、首字母缩略词、缩写、货币等。克罗地亚语的新南威尔士州根据克罗地亚新南威尔士州分类法确定。本研究共收集了390篇文本文献,并将其分为官方文献、文学文献、信息文献、大众文献、教育文献和科学文献六类。在SKIPEZ文本集的三种不同表示形式上进行了文本分类实验:第一种表示形式以非结构特征的出现频率为特征,第二种表示形式以非结构特征的统计量(方差、变异系数、标准差等)为特征,第三种表示形式以非结构特征的出现频率为特征,第四种表示形式以非结构特征的出现频率为特征,第五种表示形式以非结构特征的统计量为特征。被用作特征;而第三表示组合了前两个特征集。实验中使用了朴素贝叶斯、CN 2、C4. 5、kNN、分类树和随机森林算法进行文本分类。使用第一个特征集(NSW频率)取得了最好的分类结果,分类准确率为87%。这表明,NSW应被视为高度屈折语言(如克罗地亚语)的特征。新南威尔士州为基础的功能降低了特征空间的维数,没有标准的词形还原程序,因此袋的新南威尔士州应考虑进一步的克罗地亚文本分类实验。

英文摘要:

This paper presents categorization of Croatian texts using Non-Standard Words (NSW) as features. Non-Standard Words are: numbers, dates, acronyms, abbreviations, currency, etc. NSWs in Croatian language are determined according to Croatian NSW taxonomy. For the purpose of this research, 390 text documents were collected and formed the SKIPEZ collection with 6 classes: official, literary, informative, popular, educational and scientific. Text categorization experiment was conducted on three different representations of the SKIPEZ collection: in the first representation, the frequencies of NSWs are used as features; in the second representation, the statistic measures of NSWs (variance, coefficient of variation, standard deviation, etc.) are used as features; while the third representation combines the first two feature sets. Naive Bayes, CN2, C4.5, kNN, Classification Trees and Random Forest algorithms were used in text categorization experiments. The best categorization results are achieved using the first feature set (NSW frequencies) with the categorization accuracy of 87%. This suggests that the NSWs should be considered as features in highly inflectional languages, such as Croatian. NSW based features reduce the dimensionality of the feature space without standard lemmatization procedures, and therefore the bag-of-NSWs should be considered for further Croatian texts categorization experiments.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑