Иван Колев Койчев

Иван Колев Койчев

Професор
Доктор
Имейл: 
ivan.koychev AT fmi.uni-sofia.bg
Телефон: 
02 971 04 00
Кабинет: 
310, блок 2
Приемно време: 

вторник 15:00-16:00; сряда 16:30-17:30

Образование и научни степени

  • 1998 - Институт по математика и информатика, БАН - Доктор
  • 1983-1988 - Факултет по математика и информатика на СУ “Св. Кл. Охридски” - Магистър
  • 1977-1981 - Математическа гимназия, гр. В. Търново

Научни интереси

  • изкуствен интелект (Artificial Intelligence),
  • машинно самообучение (Machine Learning),
  • откриване на знания (Data/Text Mining)
  • извличане на информация (Information Retrieval)
  • моделиране на потребители (User Modelling)

Преподавателска дейност

  • Изкуствен интелект (Artificial Intelligence)
  • Извличане на информация (Information Retrieval)
  • Откриване на знания в данни (Data Mining)

Списък с публикации

  1. Kraychev, B. and Koychev, I. Computationally Effective Algorithm for Information Extraction and Online Review Mining. In Proc. of International Conference on Web Intelligence, Mining and Semantics June 13-15, 2012, Craiova, Romania, ACM.
  2. Ясен Кипров, Иван Койчев, Борис Крайчев – Социален подход към семантичното анотиране на E-книги. Сборник доклади на Петата Национална конференция „Образованието в информационното общество”, Пловдив, 31.05-01.06.2012, ARIO.
  3. Александър Чомаков, Иван Койчев, Александър Григоров – Уеб базирана услуга за автоматично извличане на модел на потребителски интереси. Сборник доклади на Петата Национална конференция „Образованието в информационното общество”, Пловдив, 31.05-01.06.2012. ARIO.
  4. Peshterliev, S. and Koychev, I. Semantic Retrieval Approach to Factoid Question Answering for Bulgarian. In Proc. of Int. Conference S3T'11 (Track Intelligent Content and Semantic), Burgas 1-3 September 2011. Advances in Intelligent and Soft Computing series, Springer.(Best student paper award)
  5. Kraychev, B. and Koychev, I. Classification of Online Reviews by Computational Semantic Lexicons. In Proc. of International Conference S3T'11 (Track Intelligent Content and Semantic), Burgas 1-3 September 2011. Advances in Intelligent and Soft Computing series, Springer.
  6. Stefanov, K., Nikolov, R., Boytchev, P., Stefanova, E., Georgiev, A., Koytchev, I., Nikolova, N., and Grigorov, A. Emerging Models and e-Infrastructures for Teacher Education. To appear in Proc. of ITHET 2011, IEEE publisher.
  7. Chechev, M. and Koychev, I. Social Reading and Book Sharing - in Proc. of International Conference S3T'10 (Track Intelligent Content and Semantic), Varna, 11-12 September 2010.
  8. Damova, M. and Koychev, I. Query-Based Summarization: A survey - in Proc. of Int. Conference S3T'10 (Track Intelligent Content and Semantic), Varna, 11-12 September 2010.
  9. Kiprov, Y. and Koychev, I. Online Authoring System with Semi Automatic Annotation and Visual Knowledge Representation - in Proc. of Int. Conference S3T'10 (Track Intelligent Content and Semantic), Varna, 11-12 September 2010.
  10. Koychev, I., Dicheva D. and Nikolov, R.: SmartBook: Semantics Inside. Serdica Journal of Computing. (4), 2010, p. 263-278.
  11. Koychev, I., Nikolov, R. & Dicheva D.: SmartBook: The New Generation e-Book Meets University 2.0. Proc. of Int. Conference S3T’09 (Track Intelligent Content and Semantic), Sofia, 28,29 October’09.
  12. Chenkova, E. & Koychev I.: A Just-In-Time Information Retrieval Agent that Provides Context Aware Support of Text Creation. Proc. of Int. Conference S3T’09 (Track Intelligent Content and Semantic), Sofia, 28,29 October’09
  13. Stamenov, A. & Koychev I.: Web-based CBR System for Support Medical Diagnosis. Proc. of Int. Conference S3T’09 (Track Intelligent Content and Semantic), Sofia, 28,29 October’09.
  14. Koychev I., Nikolov, R. and Dicheva D.: SmartBook: The New Generation e-Book. Proceedings of BooksOnline'09 Workshop organised in conjunction with ECDL 2009, Corfu, October 2, 2009.
  15. Koychev, I., Nikolov, R., Dicheva, D. SmartBook –The Future E-Book And Educational Hypermedia, Proceedings of National conference "Education in Information Society", May, 11-12, Plovdiv, Editor Peter Barnev, published by ADIS & IMI-BAS, p.30-37, ISBN 978-954-8986-30-4
  16. Varbanov S., Koychev I. Software Agents’ Architecture for a Business Game. In New Trends in Mathematics and Informatics. Proceeding Jubilee International Conference, July 6 - 8, 2007, Sofia, Bulgaria - abstract
  17. Koychev I., Approaches for Learning Classifiers of Drifting Concept. (Invited talk) Security Informatics and Terrorism-Patrolling the Web. Proceedings of NATO Advanced Research Workshops, Ben-Gurion University of the Negev, Israel. 4-5 June 2007
  18. Koychev I., Experiments with Two Approaches for Tracking Drifting Concepts. in Serdica Journal of Computing 1 (2007), IMI-BAS, Sofia, p.27-44
  19. Koychev I.: Computer games - the new media in Education, (Invited talk). Proceeding of the National Conference: “Education in Information Society”, Plovdiv, October 13-14, 2006 (in Bulgarian)
  20. Boytchev P., Bontchev B., Nikolov R., Oliveira M., and Koychev I.: Designing a Toolset for the PRIME Virtual Business Environment. 10th Workshop on Experimental Interactive Learning in Industrial Management; IFIP WG5.7 SIG, Trondheim, Norway, June 2006
  21. Koychev I., Lothian R. Tracking Drifting Concepts by Time Window Optimisation – in proceeding of International Conference on Innovative Techniques and Applications of Artificial Intelligence (AI2005), Lecture Notes in Artificial Intelligence, Springer-Verlag, 2006
  22. Wiratunga, N., Lothian, R., Chakraborti, S., and Koychev, I.: A Propositional Approach to Textual Case Indexing. In Jorge, A., Torgo, L., Brazdil, P., Camacho, R., Gama J. (Eds.): Knowledge Discovery in Databases: PKDD 2005, LNCS 3721 Springer, p. 380-391
  23. Harper, DJ., Muresan, G., Liu, B., Koychev, I., Wettschereck, D., and Wiratunga N. The Robert Gordon University’s HARD Track Experiments at TREC 2004. Proceeding of the HARD, High Accuracy Retrieval from Documents (TREC 2004), NIST
  24. Wiratunga, N., Koychev, I., Massie, S. (2004). Feature Selection and Generalisation for Retrieval of Textual Cases – in the Proceeding of the 7-th European Conference on Case-Based Reasoning. Lecture Notes in Artificial Intelligence, Springer, Berlin, Heidelberg, New York. (Best paper award)
  25. Harper, D.J., Koychev, I., Sun, Y. and Pirie I. (2004). Within-document Retrieval: A User-Centred Evaluation of Relevance Profiling, Journal of Information Retrieval, 7, 265-290, 2004, Kluwer Academic Publishers
  26. Harper, D.J., Koychev, I. and Sun, Y. (2003). Query-Based Document Skimming: A User-Centred Evaluation of Relevance Profiling. Proceedings of 25-th European Conference on Information Retrieval. Lecture Notes in Computer Science. Springer-Verlag, Berlin, Heidelberg, New York, p. 377-392
  27. Koychev, I. (2002). Tracking Changing User Interests through Prior-Learning of Context. In: de Bra, P., Brusilovsky, P., Conejo, R. (eds.): Adaptive Hypermedia and Adaptive Web Based Systems. Lecture Notes in Computer Science, Vol. 2347. Springer-Verlag, Berlin, Heidelberg, New York. p. 223-232
  28. Koychev, I. (2000). Gradual Forgetting for Adaptation to Concept Drift. Proceedings of ECAI 2000 Workshop on Current Issues in Spatio-Temporal Reasoning, Berlin, p. 101-107
  29. Koychev, I. and Schwab, I. (2000). Adaptation to Drifting User's Interests. In proc. of ECML2000 Workshop: Machine Learning in New Information Age, Barcelona, Spain, p. 39-46
  30. Schwab, I., Kobsa, A. and Koychev, I. (2000). Learning about Users from Observation. In proc. of the AAAI Spring Symposium: Adaptive User Interfaces, Menlo Park CA: AAAI Press
  31. Schwab, I., Pohl, W. and Koychev, I. (2000). Learning to Recommend from Positive Evidence. Proceedings of the International Conference on Intelligent User Interfaces IUI2000, New Orleans, Louisiana, USA, ACM Press
  32. Pohl, W., Schwab, I. and Koychev, I. (1999). Learning about the User: A General Approach and Its Application. Proceeding of IJCAI'99 Workshop: Learning About Users, Stockholm, Sweden
  33. Koychev, I. (1998). Qualitative Prediction of Sequences of Events. PhD Thesis. Institute of Mathematics and Computer Science at the Bulgarian Academy of Science. (in Bulgarian)
  34. Koychev, I. (1997). Specific Difficulties in Teaching Information Technology to Public Administration Students. Proceedings of NISPAcee Workshop: Information and Communication Technology as Driving Force of Change in Public Administration, Prague, 1997, p. 76-85
  35. Dobreva, M. and Koychev, I. (1996). Text Cooperativeness: the Case of Medieval Slavic Gospel Lectionary Texts - International Journal Information Theory and Applications, vol. 4 (2)
  36. Dobreva, M. and Koychev, I. (1995). Modeling Orthographic Variety: the Case of Mediaeval Slavic Texts, In International Journal Information Theory and Applications, Vol. 3 (1)
  37. Dobreva, M., Koychev, I. and Todorov, V. (1995). Teaching Computer Science to Humanities High-School Students in Bulgaria. In Proceedings of the sixth IFIP World Conference: Computer in Education, Birmingham 1995
  38. Koychev, I. and Punnev, S., (1995). INDPS - An Interactive Non-Deterministic Prediction System. In Proceedings of the 22th International Conference IT&P, Plovdiv 1995, p. 92-99
  39. Koychev, I. and Dobreva, M. (1994). Application of Learning by Examples Method to Dating Medieval Bulgarian Manuscripts. International Journal Information Theory and Applications, vol. 2(5)
  40. Koychev, I. (1993). Learning to Predict Sequences of Events. In Proceedings of the ACMBUL93: Computer Applications. Sofia. p. 191-196
  41. Koychev, I. (1992). Using Inductive-learning Algorithms to Discover Dependencies in Set of Examples. Proceedings of the 17th Int. Conference: Information Technology and Programming. Sofia, p. 96-102
  42. Koychev, I. (1992). Incremental Learning in Qualitative Prediction. Proceedings of the 17th International Conference: Information Technology and Programming, Sofia, p.89-95.