Data Mining and Knowledge Discovery

Skupina Data Mining and Knowledge Discovery (DMKD) je jednou ze čtyř pracovních skupin na KIZI (společně vytvářejících virtuální Knowledge Engineering Group), provádí výzkum v oblasti analýzy různých druhů dat ve strukturované, semi-strukturované a textové podobě a v oblasti dolování znalostí z těchto dat.

V současné době se skupina zaměřuje na:

  • vývoj nových nástrojů pro práci s doménovou znalostí pro data mining,
  • vývoj nových nástrojů pro automatizaci dolování z dat,
  • výzkum v oblasti strojového učení, algoritmů a v oblasti srozumitelnosti výsledků data miningu,
  • zpřístupnění „klasických“ data miningových nástrojů prostřednictvím webových rozhraní a sdílení výsledků data miningu přes web,
  • extrakci strukturovaných dat z textů,
  • rozlišování textových entit, jejich klasifikaci a přiřazení k sémantickým zdrojům (např. DBpedia),
  • učení uživatelských preferencí v rámci užívání webu a multimédií.


(kvůli náročnosti udržování obou jazykových verzí jsou jen v angličtině)
  • 25 September 2018: Two new PhD students joined the group. Both Pavel Strnad (supervised by P. Berka) and Lukáš Švarc (supervised by J. Ivánek) will research on machine-learning-based anomaly detection in (various kinds of) computer network data.
  • 15 June 2018: An article on the EasyMiner system (see also the system webpage), by S. Vojíř and colleagues, appeared in the Elsevier’s KnowSys journal (IF > 4.5).
  • 25 May 2018: Tomáš Kliegr gave an interview to Deutsche Welle on the role of algorithmic bias in machine learning. The article entitled „Can AI be free of bias?“ can be freely accessed.
  • 24 May 2018: An article on term similarity benchmarks, joint work of T. Kliegr with O. Zamazal (from the SWOE group), appeared in the Elsevier’s Data & Knowledge Engineering journal (IF ~ 1.7).
  • 14 March 2018: An article on meta-learning in association rule post-processing, by P. Berka, appeared in the IOS Press‘ Intelligent Data Analysis journal (IF ~ 0.8).
  • 12 February 2018: The first term of the brand-new MSc.-level course on Data Science in Python and R (taught by T. Kliegr, in English) started. The department’s curriculum is now better balanced wrt. the modern programming-oriented paradigms in data science.
  • 13 November 2017: In the prestigious ACM-endorsed Czecho-Slovak competition of MSc. theses, IT SPY (the base round involving about 1900 theses from 20 universities), that by B. Koukal, supervised by D. Chudán, had been invited to the final round (of best nine theses) and there it obtained the SAP Award for Contribution to the Field of Enterprise Information Systems. Big congratulations!
  • 1 November 2017: An article on the InBeat system, by J. Kuchař and T. Kliegr, appeared in the Elsevier’s KnowSys journal (IF > 4.5).
  • October 2017: A new PhD student, Ivan Jelínek, joined the group (being already in his 3rd year, by transfer from DIT due to his advisor’s retirement). His topic is „Unstructured Data Analysis on Social Networks“; he will be supervised by P. Strossa from SWOE (officially and along the linguistic line) but presumably also helped by relevant DMKD folks.
  • 19 August 2017: An article comparing the GUHA and Apriori data mining methods, by J. Rauch and M. Šimůnek, appeared in the IOS Press‘ IDA journal.
  • 21 June 2017: The LHD tool by T. Kliegr won the 1st round of the DBpedia Open Extraction Challenge (TextExt) collocated with the LDK conference.
  • 31 November 2016: The JWS journal paper by T. Kliegr, joint with O. Zamazal (SWOE group) was ranked 3rd in the annual Rector’s award. Congratulations!
  • October, 2016: The project “Pilot application for distributed analysis of big data” (led by T. Kliegr), funded by the CESNET association, has been successfully defended.
  • October 4, 2016: Tomáš Kliegr gave a talk on association rule classification and the EasyMiner system developed by the DMKD group at the IEEE Days at the University of West Bohemia.
  • October 2016: A new PhD student, Jiří Zettel, joined the group. He will be supervised by prof. Petr Berka and his topic will be related to data pre-processing for data mining.
  • September 20, 2016: Stanislav Vojíř has successfuly defended his PhD thesis „Business Rule Learning using data mining of GUHA association rules“. He remains member of our team.
  • August 2016: The LHD dataset developed by our group is available for download as part of the DBpedia 2015 release.
  • June 2016: A new paper by Tomáš Kliegr (and Ondřej Zamazal): LHD 2.0: A text mining approach to typing entities in knowledge graphs appears in Elsevier’s Journal of Web Semantics. It follows up with the recent LHD paper in the same journal.
  • April 2016: T. Kliegr and his team presented EasyMiner at the popular Machine Learning Meetup.
  • November 2015: Jan Rauch and Milan Šimůnek have been awarded the UEP Rector’s Prize for their book on the LISp-Miner system.
  • September 2015: David Chudán successfully defended his PhD thesis on Association rule mining as a support for OLAP on September 22. Congratulations! (David remains at the Department, now as project worker and manager funded from
  • September 2015: The LHD dataset developed by our group is available for download as part of the DBpedia 2015 release.
  • September 2015: Tomáš Kliegr is starting his 6-month post-doc internship at University of Darmstadt. He will be mainly working with prof. Johannes Fürnkranz in the field of rule/preference learning.
  • August 2015: At the RuleML 2015 conference in Berlin, the DMKD team presented the new EasyMiner/R interface, and Tomáš Kliegr co-chaired the RecSysRules 2015 challenge.
  • June 2015: Václav Zeman defended his PhD project progress on „Data mining on linked data“ (after first year).
  • May 2015: The successful Know@LOD workshop with 3rd Linked Data Mining Challenge (LDMC), co-chaired by V. Svátek, was held at the ESWC2015 conference in Portoroz – it was the most attended of all 16 workshops.
  • May 2015: The EU Horizon 2020 project (web still under construction) started. The DMKD team (led by V. Svátek) will contribute to the WP related to budget/spending open data mining.
  • May 2015: The EU LinkedTV Integrated project was concluded by a successful final review. The rating of the project eventually was ‚Excellent Progress‘ (i.e., the best possible). A decent part of the project outcomes is due to the DMKD group development efforts (coordinated by T. Kliegr).
  • February 2015: Tomáš Kliegr has been awarded a CESNET grant on „Pilot application for distributed analysis of big data“, which will allow his team to employ the computing capacity of the CESNET Metacenter for the research tasks addressed by the DMKD group.
  • February 2015: Stanislav Vojíř obtained the Best Paper award in the Applied Informatics category at the annual PhD research symposium of the Faculty.
  • February 2015: David Pejčoch succesfully defended his PhD thesis on „complex management of data and information quality“.
  • November 2014: The article “Linked Hypernyms: Enriching DBpedia with Targeted Hypernym Discovery”, by Tomáš Kliegr, has been accepted to the Elsevier Journal of Web Semantics (IF=1.377), see the article page
  • October 2014: The Linked Hypernym Dataset (LHD), a large collection of type assignments to RDF entities built by THD tool coeloped by Tomáš Kliegr, has been integrated into the official version of German DBpedia.
  • September 2014: A new PhD student, Václav Zeman, enrolled in September 2014 (with V. Svátek as Advisor) and joined the group (as well as the SWOE group). He will be working on novel data mining techniques (with special focus on linked data), as well as upkeeping the Czech DBpedia.
  • August 2014: A project named Automated business rules extraction with feedback loop, funded by TACR, Technological Agency of the Czech Republic, started. Jan Rauch, Milan Šimůnek and Stanislav Vojíř take part in this project.
  • August 2014: The RuleML conference collocated with ECAI 2014 (Aug 18-20, 2014) was co-organized by Jan Rauch,Tomáš Kliegr and Stanislav Vojíř as Local Chairs. Tomáš also co-organized its Special Track on ‘Learning (Business) Rules from Data’.
  • May 2014: The second edition of the Linked Data Mining Challenge was co-organized by Vojtěch Svátek in connection with the Know@LOD workshop (May 25, 2014) collocated with the ESWC conference in Crete.