Year 2018

• Methodology of Selecting the Hadoop Ecosystem Configuration in Order to Improve the Performance of a Plagiarism Detection System

  Publication

  • A. Sobecki
  • M. Kępa

  - Year 2018

  The plagiarism detection problem involves finding patterns in unstructured text documents. Similarity of documents in this approach means that the documents contain some identical phrases with defined minimal length. The typical methods used to find similar documents in dig- ital libraries are not suitable for this task (plagiarism detection) because found documents may contain similar content and we have not any war- ranty that...

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Year 2015

• Improving Effectiveness of SVM Classifier for Large Scale Data

  Publication

  • J. Balicki
  • J. Szymański
  • M. Kępa
  • K. Draszawka
  • W. Korłub

  - Year 2015

  The paper presents our approach to SVM implementation in parallel environment. We describe how classification learning and prediction phases were pararellised. We also propose a method for limiting the number of necessary computations during classifier construction. Our method, named one-vs-near, is an extension of typical one-vs-all approach that is used for binary classifiers to work with multiclass problems. We perform experiments...

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• Two Stage SVM and kNN Text Documents Classifier

  Publication

  • M. Kępa
  • J. Szymański

  - Year 2015

  The paper presents an approach to the large scale text documents classification problem in parallel environments. A two stage classifier is proposed, based on a combination of k-nearest neighbors and support vector machines classification methods. The details of the classifier and the parallelisation of classification, learning and prediction phases are described. The classifier makes use of our method named one-vs-near. It is...