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Register a new userAutomatic detection of plagiarism in Arabic documents based on lexical chains
كشف حالات الإنتحال في النصوص المدونة باللغة العربية بالإعتماد على السلاسل اللغوية
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جامعة صفاقس ورقة بحثية
Publication date
2011
fields
Informatics Engineering
and research's language is
العربية
Created by
Shamra Editor
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يندرج هذا البحث في إطار الكشف الآلي لعمليات الإنتحال في النصوص المدوّنة باللغة العربية وتقدّم هذه الورقة طريقة مبتكرة تعتمد على استخراج الكلمات الهامة في النص المراد كشفه ومن ثمّ تكوين سلاسل لغوية حسب تواترها في النص. وباستعمال محركات البحث يمكن التثبت من وجود هذه السلاسل اللغوية في نصوص أخرى. في مرحلة ثانية قمنا باستعمال الترجمة الآلية للسلاسل اللغوية قصد استخراج السلاسل المرادفة باللغة الإنجليزية ومن ثمّ استعمال محركات البحث لاستخراج النصوص المدوّنة باللغة الإنجليزية والتي تتطابق مع السلاسل بعد ترجمتها. وتقدّم هذه الورقة العلمية برنامج الكاشف وهو برنامج لكشف حالات الإنتحال وقد قمنا بتقييم البرنامج على مدونة من النصوص العربية وأبرزت النتائج كفاءة الطريقة المتبعة
This paper deals with automatic detection of plagiarism in Arabic documents. We present in this paper a new idea based on the experimentation of lexical chains. The proposed method extracts those chains from original document and uses a search engine to verify if such chains occur in other documents. The second step in our methods uses automatic translation system to translate lexical chains and verify by using search engine if those chain occurs in document in other languages. Then we compute a correlation ratio between lexical chains and lexical chains extracted from documents provided by the search engine to detect plagiarism in the original document. We present in the end of this paper our prototype called « Alkachef » developed to detect plagiarism in Arabic document .
References used
Belguith L., Baccour L., Mourad G., “Segmentation de textes arabes basée sur l'analyse contextuelle des signes de ponctuations et de certaines particules”, Actes de la 12ème conférence sur le Traitement Automatique des Langues Naturelles TALN’2005, , Vol. 1, p. 451–456.Dourdan France, 6–10, Juin 2005.
Morris, J., Hirst G., “Lexical cohesion computed by thesaural relations as an indicator of the structure of text”. in Computational Linguistics 17(1): pp. 21 43, 1991
Seaward L., Matwin S., Intrinsic Plagiarism Detection using Complexity Analysis”, in PAN'09, pp. 56-61, 2009.
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This paper presents a review of available algorithms and plagiarism detection systems، and an
implementation of Plagiarism Detection System using available search engines on the web.
Plagiarism detection in natural language documents is a complicat
ed problem and it is related to the
characteristics of the language itself.
There are many available algorithms for plagiarism detection in natural languages .Generally these
algorithms belong to two main categories ; the first one is plagiarism detection algorithms based on
fingerprint and the second is plagiarism detection algorithms based on content comparison and includes
string matching and tree matching algorithms .
Usually available systems of plagiarism detection use specific type of detection algorithms or use a
mixture of detection algorithms to achieve effective detection systems (fast and accurate).
In this research, a plagiarism detection system has been developed using Bing search engine and a
plagiarism detection algorithm based on Rhetorical Structure Theory.
The advancement of the web and information technology has contributed to the rapid growth of digital libraries and automatic machine translation tools which easily translate texts from one language into another. These have increased the content acces
sible in different languages, which results in easily performing translated plagiarism, which are referred to as cross-language plagiarism''. Recognition of plagiarism among texts in different languages is more challenging than identifying plagiarism within a corpus written in the same language. This paper proposes a new technique for enhancing English-Arabic cross-language plagiarism detection at the sentence level. This technique is based on semantic and syntactic feature extraction using word order, word embedding and word alignment with multilingual encoders. Those features, and their combination with different machine learning (ML) algorithms, are then used in order to aid the task of classifying sentences as either plagiarized or non-plagiarized. The proposed approach has been deployed and assessed using datasets presented at SemEval-2017. Analysis of experimental data demonstrates that utilizing extracted features and their combinations with various ML classifiers achieves promising results.
In this paper, we introduce an algorithm for grouping Arabic
documents for building an ontology and its words. We execute
the algorithm on five ontologies using Java. We manage the
documents by getting 338667 words with its weights
corresponding
to each ontology. The algorithm had proved its
efficiency in optimizing classifiers (SVM, NB) performance, which
we tested in this study, comparing with former classifiers results
for Arabic language.
We describe our submitted system to the 2021 Shared Task on Sarcasm and Sentiment Detection in Arabic (Abu Farha et al., 2021). We tackled both subtasks, namely Sarcasm Detection (Subtask 1) and Sentiment Analysis (Subtask 2). We used state-of-the-ar
t pretrained contextualized text representation models and fine-tuned them according to the downstream task in hand. As a first approach, we used Google's multilingual BERT and then other Arabic variants: AraBERT, ARBERT and MARBERT. The results found show that MARBERT outperforms all of the previously mentioned models overall, either on Subtask 1 or Subtask 2.
The main purpose of the present research is to support Arabic Text- to - Speech synthesizers, with
natural prosody, based on linguistic analysis of texts to synthesize, and automatic prosody generation,
using rules which are deduced from recorded s
ignals analysis, of different types of sentences in Arabic. All
the types of Arabic sentences (declarative and constructive) were enumerated with the help of an expert in
Arabic linguistics . A textual corpus of about 2500 sentences covering most of these types was built and
recorded both in natural prosody and without prosody. Later, these sentences were analyzed to extract
prosody effect on the signal parameters, and to build prosody generation rules. In this paper, we present
the results on negation sentences, applied on synthesized speech using the open source tool MBROLA. The
results can be used with any parametric Arabic synthesizer. Future work will apply the rules on a new
Arabic synthesizer based on semi-syllables units, which is under development in the Higher Institute for
Applied Sciences and Technology.
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