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Algorithm Research & Explore
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App. Res. of Comp. Printed Article
Vol. 36, 2019 No. 2
415-419

Off-topic detection for English essays based on LDA and word2vec

Qu Qiang
Cui Rongyi
Zhao Yahui
Laboratory of Intelligent Information Processing, Dept. of Computer Science & Technology, Yanbian University, Yanji Jilin 133002, China
DOI: 10.19734/j.issn.1001-3695.2017.08.0724

Abstract

Aiming at the problem that the lack of accurate and efficient off-topic detection algorithm for the current English composition teaching system in China, this paper proposed an off-topic detection algorithm based on LDA and word2vec. The algorithm used LDA to model the documents and trained it with word2vec, with obtained semantic relation between document’s topic and words, calculated the probability weighted sum of each topic and its feature words in the document. Finally, by setting reasonable threshold, it selected the off-topic essays. According to the different F values for the different number of topics in the document, it determined the optimum number of topics in the experiment. The experimental results show that, compared to traditional vector space model, the proposed method can detect more off-topic essays with higher accuracy, and the F value is above 89%, which realizes the intelligent processing of off-topic essays detection, and may applies effectively in English essays teaching.

Foundation Support

国家语委“十二五”科研规划2015年度科研项目(YB125-178)

Publish Information

DOI: 10.19734/j.issn.1001-3695.2017.08.0724
Publish at: Application Research of Computers Printed Article, Vol. 36, 2019 No. 2
Section: Algorithm Research & Explore
Pages: 415-419
Serial Number: 1001-3695(2019)02-022-0415-05

Publish History

[2019-02-05] Printed Article

Cite This Article

曲强, 崔荣一, 赵亚慧. 基于LDA和word2vec的英文作文跑题检测 [J]. 计算机应用研究, 2019, 36 (2): 415-419. (Qu Qiang, Cui Rongyi, Zhao Yahui. Off-topic detection for English essays based on LDA and word2vec [J]. Application Research of Computers, 2019, 36 (2): 415-419. )

About the Journal

  • Application Research of Computers Monthly Journal
  • Journal ID ISSN 1001-3695
    CN  51-1196/TP

Application Research of Computers, founded in 1984, is an academic journal of computing technology sponsored by Sichuan Institute of Computer Sciences under the Science and Technology Department of Sichuan Province.

Aiming at the urgently needed cutting-edge technology in this discipline, Application Research of Computers reflects the mainstream technology, hot technology and the latest development trend of computer application research at home and abroad in a timely manner. The main contents of the journal include high-level academic papers in this discipline, the latest scientific research results and major application results. The contents of the columns involve new theories of computer discipline, basic computer theory, algorithm theory research, algorithm design and analysis, blockchain technology, system software and software engineering technology, pattern recognition and artificial intelligence, architecture, advanced computing, parallel processing, database technology, computer network and communication technology, information security technology, computer image graphics and its latest hot application technology.

Application Research of Computers has many high-level readers and authors, and its readers are mainly senior and middle-level researchers and engineers engaged in the field of computer science, as well as teachers and students majoring in computer science and related majors in colleges and universities. Over the years, the total citation frequency and Web download rate of Application Research of Computers have been ranked among the top of similar academic journals in this discipline, and the academic papers published are highly popular among the readers for their novelty, academics, foresight, orientation and practicality.

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