Papers / Publications

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Ph.D. Thesis / Thèse de doctorat

Petko Valtchev, Construction automatique de taxonomies pour l'aide à la représentation de connaissances par objets, Thèse de Doctorat en Informatique, Université Joseph Fourier, Grenoble (FR), defended December 15th, 1999.
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International journals / Revues internationales

Petko Valtchev, Rokia Missaoui, Pierre Lebrun, A partition-based approach towards constructing Galois (concept) lattices. Discrete Mathematics 256(3):801-829, 2002.
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Petko Valtchev, Rokia Missaoui, Robert Godin, Mohamed Meridji, Generating frequent itemsets incrementally: two novel approaches based on Galois lattice theory. Journal of Experimental and Theoretical Artificial Intelligence 14(2-3):115-142, 2002.
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Petko Valtchev, An Algorithm for Minimal Insertion in a Type Lattice, Computational Intelligence 15(1):63-78, 1999.
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Mariane Huchard, Mohamed Rouane Hacene, Cyril Roume, Petko Valtchev*, Relational concept discovery in structured datasets, accepted in Discrete Applied Mathematics
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Chapters in books / Chapitres dans des ouvrages collectifs

Robert Godin, Petko Valtchev, Formal concept analysis-based normal forms for class hierarchy design in object-oriented software development, accepted in the volume Formal Concept Analysis: State of the Art, 18 p., B. Ganter, G. Stumme (eds.), Springer Verlag.

Petko Valtchev, Proximity function for clustering of software objects, dans Advances in Data Science and Classification, Springer Verlag, pp. 441-448, Rome (IT), (21-24 July) 1998.
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Petko Valtchev, Jérôme Euzenat, Classification of concepts through products of concepts and abstract data types, dans Ordinal and symbolic data analysis, Edwin Diday, Yves Lechevallier, Otto Opitz (éds.), Springer Verlag, Heildelberg (DE), pp. 3-12, 1996.
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Peer-reviewed papers from international conferences / Conférences internationales avec comité de lecture

Kamal Nehme, Petko Valtchev, Mohamed Rouane Hacene, Robert Godin, On Computing the Minimal Generator Family for Concept Lattices and Icebergs, in Proceedings of the 3rd Intl. Conference on Formal Concept Analysis, LNCS 3403, pp. 192–207, Lens (FR), Springer Verlag, (14-18 February) 2005.

Jean François Djoufak Kengue, Petko Valtchev, Clémentin Tayou Djamegni, A Parallel Algorithm for Lattice Construction, in Proceedings of the 3rd Intl. Conference on Formal Concept Analysis, LNCS 3403, pp. 248–263,, Lens (FR), Springer Verlag, (14-18 February) 2005.

Jérôme Euzenat,  Petko Valtchev, Similarity-based ontology alignment in OWL-Lite, in Proceedings of the 16th European Conference on Artificial Intelligence (ECAI’04), pp. 333 - 337, Valence (SP), (22-27 August) 2004.

Philippe Lahire, Gabriela Arévalo, Hhernan Astudillo, Andrew Black, Erik Ernst, Marianne Huchard, Tomas Oplustil, Marku Sakkinen, Petko Valtchev, Mechanisms for Specialization, Generalization and Inheritance, in ECOOP 2004 Workshop Reader, LNCS 3344: 17 p., Springer-Verlag. 2004.

Michel Dao, Mariane Huchard, Mohamed Rouane Hacene, Cyril Roume, Petko Valtchev* Improving Generalization level in UML Models: Iterative Cross Generalization in Practice, in Proceedings of the 12th International Conference on Conceptual Structures (ICCS’04), LNCS 3127, pp. 346-360, Huntsville (AL), Springer Verlag, (19-23 July) 2004.

Mohamed Rouane Hacene, Kamal Nehme, Petko Valtchev, Robert Godin, On-line maintenance of iceberg concept lattices, dans Contributions to the 12th International Conference on Conceptual Structures (ICCS’04), 14 p., Huntsville (AL), Shaker Verlag, (19-23 July) 2004.

Petko Valtchev, Rokia MissaouiRobert Godin, Formal Concept Analysis for Knowledge Discovery and Data Mining: The New Challenges, dans Proceedings of the 2nd Intl. Conference on Formal Concept Analysis, LNCS 2961, pp. 352-371, Sydney (AU), Springer Verlag, (23-26 February) 2004.

Lei Wu, Houari Sahraoui, Petko Valtchev, Legacy Design Recovery with Dynamic Visualization, in Proceedings of the 16th International Conference Software and Systems Engineering and their Applications Paris (FR), (2-4 December) 2003.

David Grosser, Houari Sahraoui, Petko Valtchev, Case-Based Reasoning for predicting stability evolution of Java classes, in Proceedings of the 9th Intl. Software Metrics Symposium, pp. 252-262, Sidney (AU), IEEE Computer Society , (3-5 September) 2003.

Petko Valtchev, Vincent Duquenne, Towards scalable divide-and-conquer methods for computing concepts and implications, in Proceedings of the 4th Intl. Conference Journées de l'Informatique Messine (JIM'03): "Knowledge Discovery and Discrete Mathematics", pp. 3-15, Metz (FR), INRIA, (3-6 September) 2003.
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Petko Valtchev, Mohamed Rouane HaceneMarianne Huchard, Cyril Roume, Extracting Formal Concepts out of Relational Data, in Proceedings of the 4th Intl. Conference Journées de l'Informatique Messine (JIM'03): "Knowledge Discovery and Discrete Mathematics", pp. 37-49, Metz (FR), INRIA, (3-6 September) 2003.
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Petko Valtchev, Mohamed Rouane Hacene, Rokia Missaoui, A generic scheme for the design of efficient on-line algorithms for lattices,
in Proceedings of the 11th Intl. Conference on Conceptual Structures (ICCS'03), pp. 282-295, Dresde (DE), Springer Verlag (LNAI), (21-25 July) 2003.
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Petko ValtchevDavid Grosser, Cyril Roume, Mohamed Rouane Hacene, GALICIA: an open platform for lattices, in Using Conceptual Structures: Contributions to the 11th Intl. Conference on Conceptual Structures (ICCS'03), pp. 241-254, Dresde (DE), Shaker Verlag, (21-25 July) 2003.
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David Grosser, Houari A. Sahraoui, Petko Valtchev, Préediction de la stabilitée des interfaces de classes Java: Une approche par analogie, in  Série L'objet, vol. 9, no. 1-2, J.-P. Briot, J. Malenfant (eds.), Actes de la 9eme Conférence Internationale sur les Langages et les Modèles à Object (LMO), pp. 61-73, Vannes (FR), Hermès, (3-5 February) 2003.

David Grosser, Houari A. Sahraoui, Petko Valtchev
, Predicting Software Stability Using Case-Based Reasoning, Proceedings of the 17th IEEE International Conference on Automated Software Engineering (ASE 2002), Edinburgh (UK), pp. 295-298, (23-27 September) 2002.

Houari Sahraoui, Petko Valtchev, Idrissa Konkobo, Shiqiang Shen, Object Identification in Legacy Code as a Grouping Problem, Proceedings of the 26th COMPSAC Conference, IEEE Computer Society Press, Oxford (UK), pp. 689-696, (26-29 August) 2002.

Petko Valtchev, Rokia Missaoui, Building Galois (Concept) Lattices from Parts: Generalizing the Incremental Approach. dans Proceedings of the ICCS 2001, Harry Delugach, Gerd Stumme (eds.), LNCS 2120, Springer Verlag, pp. 290-303, Stanford (CA), (30 July- 3 August) 2001.
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Petko Valtchev, Jérôme Euzenat, Une stratégie de construction de taxonomies dans les objets. dans Actes des Septièmes journées de la Société Francophone de Classification, SFC'99, F. Le Ber, J.F. Mari, A. Napoli et A. Simon (éds.), pp. 307-314, Nancy (FR), (15-17 September) 1999.
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Petko Valtchev, Building classes of software objects by automatic clustering, dans Proceedings of the 3rd International Symposium on Intelligent Data Analysis, David Hand, Joost Kok, Michael Berthold (éds.), LNCS 1642, Springer Verlag, pp.303-314, Amsterdam (NL), (9-11 August) 1999.
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Petko Valtchev, Jérôme Euzenat, Dissimilarity measure for collections of objects and values, dans Proceedings of the 2nd International Symposium on Intelligent Data Analysis, Xiaohui Liu, Paul Cohen, Michael Berthold (éds.),  LNCS 1280, Springer Verlag, pp. 259-272, London (UK), (6-8 August), 1997.
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Petko Valtchev, An Algorithm for Minimal Insertion in a Type Lattice, dans Proceedings of the 2nd International Symposium on Knowledge, Retrieval, Use and Storage for Efficiency (KRUSE), Vancouver (CA), pp. 82-94, (11-13 August) 1997.

Petko Valtchev, Jérôme Euzenat, Classification of concepts through products of concepts and abstract data types (abstract), dans Actes provisoires de 1st International Conference on Data Analysis and Ordered Structures, pp. 131-134, Paris (FR), (20-23 June) 1995.

Danielle Ziébelin, Petko Valtchev, Irena Iordanova, Annick Vila, Classification of complex objects in a knowledge-based diagnosis system, dans Proceedings of the 6th international conference on artificial intelligence: methodology, systems, applications, pp. 269-279, Sofia (BG), (21-24 September) 1994.


Workshops / Colloques

Jérôme Euzenat, Petko Valtchev, An integrative proximity measure for ontology alignment, in Proceedings of the 1st Intl. Workshop on Semantic Integration, 6 p.,
Sanibel Island (FL/US), (20 octobre) 2003.

David Grosser, Houari Sahraoui, Petko Valtchev, Analogy-based Software Quality Prediction, in Proceedings of the 7th ECOOP Workshop on Quantitative Approaches in Object-Oriented Software Engineering (QAOOSE'2003), 6 p., Darmstadt (DE), (22 July) 2003.

Christian Fisette, Robert Godin, David Grosser, Amélie le Floc'h, Rokia Missaoui, Mohamed  Rouane Hacene, Cyril Roume, Petko Valtchev, Jean Villerd, GALICIA: plate-forme ouverte pour l'Analyse de Concepts Formels. in Actes de l'Atelier "Treillis de Galois et IA" de la Plate-forme AFIA'03, pp. 29-38, Laval (FR), AFIA, (4 July) 2003.

Amélie le Floc'h, Christian Fisette, Rokia Missaoui, Petko Valtchev, Robert Godin, JEN: un algorithme efficace de construction de générateurs pour l'identification des règles d'association, in Actes des 35emes Journées de la Société Française de Statistique, 15 p., Lyon (FR), (2-6 June) 2003.

Petko Valtchev, Rokia MissaouiMohamed  Rouane Hacene, Robert Godin, Incremental Maintenance of Association Rule Bases, in Proceedings of the 2nd Intl. Workshop on Data Mining and Discrete Mathematics, 12 p., San Francisco (CA/US), (3 May) 2003.

Marianne Huchard, Cyril Roume, Petko Valtchev, When concepts point at other concepts: the case of UML diagram reconstruction, in Proceedings of the 2nd Intl. Workshop on Advances in Formal Concept Analysis for Knowledge Discovery in Databases (FCAKDD), pp. 32-43, Lyon (FR),(23 July) 2002.

Robert Godin, Marianne Huchard, Cyril Roume, Petko ValtchevInheritance And Automation: Where Are We Now?, in Object-Oriented Technology: ECOOP Workshop Reader, Lecture notes in computer science, Malaga (SP), Springer Verlag, (10 June) 2002.

Petko Valtchev, Rokia Missaoui, Robert Godin, A Framework for Incremental Generation of Frequent Closed Itemsets, Proceedings of the 1st Intl. Workshop on Data Mining and Discrete Mathematics, Washington (DC), pp. 75-86, (13 April) 2002.

Hafedh Mili, Petko Valtchev, Anne-Marie Di-Sciullo, Philippe Gabrini, An Automatic Approach Towards the Design of Libraries of Reusable Software Components. dans Proceedings of the 6th International Workshop on Applications of Natural Language to Information Systems, Madrid (SP), (28-29 June) 2001.

Petko Valtchev, Rokia Missaoui, Exploration of complex objects structure for knowledge discovery. dans Proceedings of the Workshop on Dealing with Structured Data in Machine Learning and Statistics. European Conference on Machine Learning ECML 2000, pp. 57-69, Barcelone (ES),  (30 May - 2 June) 2000
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Petko Valtchev, Rokia Missaoui, Similarity-based Clustering versus Galois lattice building: Strengths and Weaknesses. présenté à Workshop "Objects and Classification, A natual convergence". European Conference on Object-Oriented Programming 2000, Nice (FR), (12-16 June) 2000
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Petko Valtchev, Rokia Missaoui, Pierre Lebrun, A Fast Algorithm for Building the Hasse Diagram of a Galois Lattice. dans Actes du Colloque LaCIM 2000, pp. 293-306, Montréal (CA), (7-10 September) 2000
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Non-reviewed papers / Conférences sans arbitrage

Petko Valtchev, Clustering with multiple taxonomies (abstract), Proceedings of the 2nd International Conference on Data Analysis and Ordered Structures, Darmstadt (DE), (19-21 mars) 1997.

Petko Valtchev, Automatic taxonomy building within an advanced object formalism, dans Proceedings of the Indo-French Workshop on Symbolic Data Analysis and its Applications, M. Csernel, C. Pardoux, and E. Perinel (éds), volume II, pp. 200-211. Université Paris IX - Dauphine, Paris (FR), (23-25 September) 1997.
 

Technical reports / Rapports de recherche

Petko ValtchevDavid Grosser, Cyril Roume, Mohamed Rouane Hacene, GALICIA: an open platform for lattices, Rapport de recherche no. 1226, DIRO, Université de Montréal, (February) 2003.

Petko Valtchev, Mohamed Rouane Hacene, Rokia Missaoui, A generic scheme for the design of efficient on-line algorithms for lattices, Rapport de recherche no. 1225, DIRO, Université de Montréal, (February) 2003.

Petko Valtchev, Rokia Missaoui, A Framework for Incremental Generation of Frequent Closed Itemsets, Rapport de recherche no. 1216, DIRO, Université de Montréal, (February) 2003.

Petko Valtchev, Rokia Missaoui, Robert Godin, Mohamed Meridji, Generating frequent itemsets incrementally: two novel approaches based on Galois lattice theory.  Rapport de recherche no. 2001-05, Département d'Informatique, UQAM, Montréal (CA), (December) 2001.
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Petko Valtchev, Rokia Missaoui, Building Galois (Concept) Lattices From Parts: Generalizing The Incremental Approach. Rapport de recherche no. 2001-01, Département d'Informatique, UQAM, Montréal (CA), (January) 2001.
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Petko Valtchev, Rokia Missaoui, Pierre Lebrun, A Partition-Based Approach Towards Building Galois (Concept) Lattices. Rapport de recherche no. 2000-08, Département d'Informatique, UQAM, Montréal (CA), (August) 2000.
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Current submissions / Soumissions en cours

Petko Valtchev, Rokia Missaoui, Efficient Incremental Generation of Frequent Closed Itemsets, submitted to Discrete Applied Mathematics.

C. Ch. Latiri, S. Ben Yahia, P. Valtchev, G. Mineau, Query Expansion Using Conceptual Irredundant Association Rules Between Terms, 29 p., submitted to Information Retrieval.



*) Order of authors is alphabetical.