English Version

Dr. Marius-Nicolae Popescu





Marius Popescu, Lecturer at the University of Bucharest, Department of Computer Science, since 2004. Ph.D. in 2004 with the thesis "Machine Learning Applied in Natural Language Processing".

My domains of interest are: artificial intelligence, machine learning, computational linguistics, information retrieval, authorship identification, computer vision. My achievements in these fields include: a new method for automatic word sense disambiguation that was awarded third prize at the Senseval 3 evaluation exercises for word sense disambiguation organized by ACL-SIGLEX in 2004; coauthor of the method ENCOPLOT for plagiarism detection which won the first international competition in automatic plagiarism detection in 2009, followed by ranking 4th at PAN@CLEF 2010 and 2nd at PAN@CLEF 2011; a method for authorship analysis which obtained the best results in the author identification task at PAN@CLEF 2012; Co-author of learning systems that ranked on 3rd place in the Native Language Identification Shared Task of the BEA 8 Workshop of NAACL 2013, and on 4th place in the Facial Expression Recognition Challenge of the WREPL Workshop of ICML 2013.
Publications:
  1. Marius Popescu. Training Strategies in Learning to Play Games. Annals of the University of Bucharest, Mathematics - Computer Science, Special Issue, Proceedings of Annual Meeting of Faculty of Mathematics, 28-30 nov. 1996, p. 147-163.
  2. Marius Popescu. Maximum Entropy Models for Dependency Parsing. Annals of the University of Bucharest, COMPUTER SCIENCE, an XLVI, 1997, p. 115-122.
  3. Florentina Hristea, Marius Popescu. A Word Grammar Approach to Syntactic Analysis with Special Reference to Romanian. Annals of the University of Bucharest, Mathematics - Computer Science, Special Issue, Proceedings of the Annual Meeting of the Faculty of Mathematics, 8-9 May 1998, p. 101-111.
  4. Florentina Hristea, Marius Popescu. A Dependency Grammar Approach to Syntactic Analysis with Special Reference to Romanian. In: Building Awareness in Language Technology (eds. Florentina Hristea and Marius Popescu). Editura Universitatii din Bucuresti, 2003, p. 9-16.
  5. Marius Popescu. Dependency Grammar Annotator. In: Building Awareness in Language Technology (eds. Florentina Hristea and Marius Popescu). Editura Universitatii din Bucuresti, 2003, p.17-34.
  6. Marius Popescu. Regularized Least-Squares Classification for Word Sense Disambiguation. Proceedings of The Third International Workshop on the Evaluation of Systems for the Semantic Analysis of Text (Senseval-3). ACL-2004 Workshop. Barcelona: Jul 2004, p. 209-212.
  7. Florentina Hristea, Marius Popescu. On Some Romanian Text Summarization Contributions. Revue Roumaine de Linguistique, VOL. LI, Issues 3-4, 2006, p. 507-509.
  8. Marius Popescu, Liviu P. Dinu Kernel Methods and String Kernels for Authorship Identification: The Federalist Papers Case. Proceedings of the International Conference on Recent Advances in Natural Language Processing (RANLP-07). Borovets, Bulgaria. 2007.
  9. Marius Popescu, Liviu P. Dinu. Rank Distance as a Stylistic Similarity. Proceedings of the 22nd International Conference on Computational Linguistics (Coling 2008). Manchester, UK. 2008.
  10. Liviu P. Dinu, Marius Popescu. A Multi-Criteria Decision Method Based on Rank Distance. Fundamenta Informaticae. 86(1-2), 2008.
  11. Florentina Hristea, Marius Popescu, Monica Dumitrescu. Performing word sense disambiguation at the border between unsupervised and knowledge-based techniques. Artificial Intelligence Review. 30(1-4), 2008.
  12. Florentina Hristea, Marius Popescu. Adjective Sense Disambiguation at the Border Between Unsupervised and Knowledge-Based Techniques. Fundamenta Informaticae. 91(3-4), 2009.
  13. Liviu P. Dinu, Marius Popescu. A Language Independent Kernel Method for Classifying Texts with Disputed Paternity. Proceedings of the XIII International Conference Applied Stochastic Models and Data Analysis (ASMDA 2009). Vilnius, Lithuania. 2009.
  14. Vivi Nastase, Marius Popescu. What.s in a name? In some languages, grammatical gender. Proceedings of the EMNLP 2009 Conference on Empirical Methods in Natural Language Processing. Singapore. 2009.
  15. Marius Popescu, Liviu P. Dinu. Comparing Statistical Similarity Measures for Stylistic Multivariate Analysis. Proceedings of the International Conference on Recent Advances in Natural Language Processing (RANLP-09). Borovets, Bulgaria. 2009.
  16. Cristian Grozea, Christian Gehl, Marius Popescu. ENCOPLOT: Pairwise Sequence Matching in Linear Time Applied to Plagiarism Detection. Proceedings of the 3rd PAN Workshop: Uncovering Plagiarism, Authorship and Social Software Misuse. San Sebastian, Spain. 2009.
  17. Liviu P. Dinu, Marius Popescu. Ordinal measures in authorship identification. Proceedings of the 3rd PAN Workshop: Uncovering Plagiarism, Authorship and Social Software Misuse. San Sebastian, Spain. 2009.
  18. Cristian Grozea, Marius Popescu. Who's the Thief? Determining the Direction of Plagiarism. 11th International Conference on Intelligent Text Processing and Computational Linguistics, CICLing-2010: March 21-27, 2010, Iasi, Romania. Proceedings. Lecture Notes in Computer Science, 6008, Springer, 2010.
  19. Cristian Grozea, Marius Popescu. Encoplot - Performance in the Second International Plagiarism Detection Challenge. Lab Report for PAN at CLEF 2010 . CLEF (Notebook Papers/LABs/Workshops) 2010.
  20. Marius Popescu, Florentina Hristea. State of the art versus classical clustering for unsupervised word sense disambiguation. Artificial Intelligence Review. 35(3), 2011.
  21. Cristian Grozea, Marius Popescu. The Encoplot Similarity Measure for Automatic Detection of Plagiarism. - Notebook for PAN at CLEF 2011 . CLEF (Notebook Papers/LABs/Workshops) 2011.
  22. Marius Popescu. Studying Translationese at the Character Level. Proceedings of the International Conference on Recent Advances in Natural Language Processing (RANLP 2011). Hissar, Bulgaria. 2011.
  23. Marius Popescu, Cristian Grozea. Kernel Methods and String Kernels for Authorship Analysis. CLEF (Online Working Notes/Labs/Workshop) 2012.
  24. Cristian Grozea, Marius Popescu. Encoplot - Tuned for High Recall (also Proposing a New Plagiarism Detection Score). CLEF (Online Working Notes/Labs/Workshop) 2012.
  25. Dinu, Liviu Petrisor, Radu-Tudor Ionescu, Marius Popescu. Local patch dissimilarity for images. Neural Information Processing. Springer Berlin Heidelberg, 2012.
  26. Popescu, Marius, Radu Tudor Ionescu. The Story of the Characters, the DNA and the Native Language. NAACL/HLT 2013 (2013): 270.
  27. Ionescu, Radu Tudor, Marius Popescu, Cristian Grozea. Local Learning to Improve Bag of Visual Words Model for Facial Expression Recognition. ICML 2013 Workshop on Representation Learning, Atlanta, Georgia, USA, 2013.


BOOKS; EDITOR:

Florentina Hristea, Marius Popescu (eds.). Building Awareness in Language Technology. Editura Universitatii din Bucuresti, 2003 (478 pag.).




Prof.dr. Ornea Liviu - secretar stiintific

  


Data si locul nasterii: 14.07.1960, Bucuresti.

Studii: Facultatea de Matematica, Universitatea din Bucuresti (licenta 1984, specializare in algebra-geometrie 1985).
Doctorat: 1993, Universitatea din Bucuresti, cu teza "Structuri geometrice pe varietati complexe. Structuri local conform Kaehler" (indrumator Prof.dr. S. Ianus).
Pozitii academice: Asistent (1990-1995), Lector (1995-2000), Conferentiar (2000-2004), profesor (2004-prezent).
Pozitii de cercetare: Cerc. st. I la Institutul de Matematica "Simion Stoilow" al Academiei Romane (2007-prezent).
Cursuri predate la Facultatea de Matematica si la SNSB: Geometrie, Geometrie diferentiala, Topologie algebrica, Calcul variational in geometria riemanniana, Geometrie simplectica, Geometrie complexa, Concepte algebrice in geometrie.
Profesor/cercetator vizitator: "Max Planck" Inst. (Bonn), Ecole Polytechnique (Paris), ICTP (Trieste), "Erwin Schroedinger" Inst. (Viena), University of New Mexico (Albuquerque), Univ. din Roma "La Sapienza", Ecole Polytechnique Federale de Lausanne, Tokyo Metropolitan Univ. etc.
Domeniul de cercetare: Geometria diferentiala.
Premiul "Gheorghe Titeica" al Academiei Romane in 1998 pentru cartea "Locally conformal Kaehler geometry" (Birkhauser).


 Pentru informatii complete: pagina personala

Carti si manuale

  1. Curbe si suprafete diferentiabile (culegere de probleme), Ed. Universitatii Bucuresti, 1995.
  2. Locally conformal Kähler geometry, Progress in Math. 155, Birkhuäser, (1998) (cu Sorin Dragomir). MR99a:53081.
  3. O introducere in geometrie. Fundatia Theta 2000 (cu Adriana Turtoi). Zbl 1033.51001.

Articole stiintifice

  1. Conformally Einstein Products and Nearly Kaehler Manifolds (impreuna cu Andrei Moroianu). Annals of Global Analysis and Geometry 33(2008), 11-18.
  2. Embeddings of compact Sasakian manifolds (impreuna cu Misha Verbitsky). Mathematical Research Letters, 14 (2007), 703-710.
  3. Einstein-Weyl structures on complex manifolds and conformal version of Monge-Ampere equation (impreuna cu Misha Verbitsky). Bull. Math. Soc. Sci. Math. Roumanie Tome 51(99) No.4, 2008, 339-353.
  4. Sasakian structures on CR-manifolds (impreuna cu Misha Verbitsky). Geometriae Dedicata 125 (2007), 159-173.
  5. Constructions in Sasakian Geometry (impreuna cu Charles P. Boyer, Krzysztof Galicki). Mathematische Zeitschrift 257 (2007), 907-924.
  6. Locally conformal Kaehler manifolds with potential (impreuna cu Misha Verbitsky). Va aparea in Mathematische Annalen.
  7. Vaisman reduction in complex and quaternionic geometry (impreuna cu R.Gini, M.Parton si P.Piccinni). Journal of Geometry and Physics, 56 (2006), 2501-2522.
  8. CR-submanifolds. A class of examples. Revue roumaine de math. pures appl. 51 (2006) 77-85.
  9. Locally conformally Kaehler manifolds. A selection of results. Lecture Notes of Seminario Interdisciplinare di Matematica, 4(2005), 121-152. MR2007c:53101.
  10. Non-zero contact and Sasakian reduction (impreuna cu O.Dragulete), Differential Geometry and its Applications 24 (2006), 260-270. MR2007e:53111.
  11. Harmonicity and minimality of vector fields and distributions on locally conformal Kaehler and hyperkaehler manifolds (impreuna cu L.Vanhecke), Bull. of the Belgian Math. Soc. "Simon Stevin" 12 (2005) 543-555. MR2007d:53106.
  12. An immersion theorem for Vaisman manifolds (impreuna cu M.Verbitsky), Mathematische Annalen 332 (2005), 121-143. MR2006e:53112.
  13. Locally conformal Kaehler reduction (impreuna cu R. Gini and M. Parton). Crelle Journal fuer die Reine und Angewandte Mathematik 581 (2005), 1-21. MR2006c:53077.
  14. Geometric flow on compact locally conformally Kaehler manifolds (impreuna cu Y.Kamishima). Tohoku Math. J. 57 (2) (2005), 201-221. MR2006g:53112.
  15. Eigenvalue estimates for the Dirac operator and harmonic 1-forms of constant length (impreuna cu A.Moroianu). Comptes Rendus Acad. Sci. Paris, 338 (2004), 561-564. MR2005f:58054.
  16. Structure theorem for compact Vaisman manifolds, Mathematical Research Letters, 10 (2003), 799-805 (impreuna cu M. Verbitsky). Also available at math.DG/0305259. MR2004j:53093).
  17. Potential 1-forms for hyper-Kaehler structures with torsion, Classical and Quantum Gravity 20 (2003), 1845-1856 (impreuna cu Y.S Poon si A.Swann). MR2004e:53070.
  18. Cosphere bundle reduction in contact geometry, Journal of symplectic geometry, 1(4) (2002), 695-714. (impreuna cu O.Dragulete si T.S.Ratiu) MR2004m:53141.
  19. Weyl structures in quaternionic geometry. A state of the art. Barletta, Elisabetta (ed.), Selected topics in geometry and mathematical physics. Vol.I. Potenza: Univ. degli Studi della Basilicata, Dipartimento di Matematica, Seminario Interdisciplinare di Matematica, 43-80 (2001). Zbl 1029.53055
  20. Cayley 4-frames and a quaternion Kaehler reduction related to Spin(7), Global differential geometry: the mathematical legacy of Alfred Gray (Bilbao 2000), 401-405, Contemporary Mathematics 288, Amer. Math. Soc. Providence, RI, 2001 (impreuna cu Paolo Piccinni). MR 2003c:53072.
  21. Reduction of Sasakian manifolds, Journal of Mathematical Physics 48 (2001), 3809-3816 (impreuna cu G.Grantcharov) MR 2002e:53060.
  22. Local almost contact metric 3-structures, Publicationes Mathematicae (Debrecen) 57 (2000) 499-508 (impreuna cu Paola Matzeu) MR 2002a:53057.
  23. Complex structures on some Stiefel manifolds, Bull. Math. Soc. Sci. Math. Roumanie (N.S.) 49 (2000) (impreuna cu Paolo Piccinni) MR 2002c:53120.
  24. On some moment maps and induced Hopf bundles in the quaternionic projective space, International Journal of Mathematics 11 (2000), 925-942 (impreuna cu Paolo Piccinni) MR 2002a:53061.
  25. Intersections of Riemannian submanifolds. Variations on a theme by T.J.Frankel, Rendiconti di Matematica (Roma), 19 (1999), 107-121 (impreuna cu T.Bingh si L.Tamassy) MR 2000g:53074.
  26. Locally conformal Kaehler metrics on Hopf surfaces, Annales de l'Institut Fourier, 48 (1998), 1107-1127 (impreuna cu P.Gauduchon) MR 2000g:53088.
  27. Compact hyperhermitian-Weyl and quaternion Hermitian-Weyl manifolds, Annals of Global Analysis and Geometry, 16 (1998), 383-398. (impreuna cu P.Piccinni). MR 99k:53097; Erratum, idem, 18 (2000), 105-106. MR 2000k:53044.
  28. An example of an almost hyperbolic Hermitian manifold, International Journal of Mathematics and Mathematical Sciences, 21 (1998), 613-618 (impreuna cu C.-L.Bejan). MR 98m:53039.
  29. Locally conformal Kaehler structures in quaternionic geometry, Transactions of the American Mathematical Society, 349 (1997), 641-655, (impreuna cu P.Piccinni). MR 97e:53091.
  30. Induced Hopf bundles and Einstein metrics, in New developments in differential geometry, Budapest (1996), 295-306, Kluwer (impreuna cu P.Piccinni). MR 99k:53099.
  31. Weyl structures on quaternionic manifolds, Proceedings of the Meeting on Quaternionic Structures in Mathematics and Physics, Trieste 1994. SISSA, Trieste, (1996), 261-267, (impreuna cu P.Piccinni). MR 99k:53098.
  32. Holomorphic and harmonic maps on locally conformal Kaehler manifolds, Bolletino dell'Unione Matematica Italiana, (7)9-A(1995), 569-579, (impreuna cu S.Ianus, V.Vuletescu), MR 96i:58037.
  33. Conformal geometry of Riemannian submanifolds. Gauss, Codazzi and Ricci equations, Rendiconti di Matematica (Roma), 15, (1995), 233-249, (impreuna cu G.Romani). Zbl. 833:53015.
  34. Extrinsic spheres of a generalized Hopf manifold. Publ. Math. Debrecen 44 (1994), 189-200 (impreuna cu S.Ianus, K.Matsumoto). MR94m:53080.
  35. Locally conformal Kaehler manifolds. A survey, Quaderno n. 12, Dip. di Mat., Univ. di Roma "La Sapienza", (1994).
  36. The fundamental equations of conformal submersions, Beitrage zur Algebra und Geometrie / Contributions to Algebra and Geometry, 34, (1993), 233-243, (impreuna cu G.Romani), MR 95a:53055.
  37. Submanifolds with parallel second fundamental form in a generalized Hopf manifold, Ricerche di Matematica (Napoli), XLII, (1993), 3-9, MR 95d:35066.
  38. Immersions spheriques dans une variete de Hopf generalisee, Comptes Rendus de l' Acad. Sci. Paris, 316, (1993), 63-66, (impreuna cu S.Ianus, K.Matsumoto), MR 93m:53067.
  39. A theorem on nonnegatively curved locally conformal Kaehler manifolds, Rendiconti di Matematica (Roma), serie VII, 12, (1992), 257-262, MR 93h:53071.
  40. A certain symmetric F-connection in locally conformal Kaehler manifolds. Bull. Yamagata Univ. Natur. Sci. 12 (1991), no.4, 299-306 (impreuna cu S.Ianus, K.Matsumoto). MR92a:53026.
  41. A class of antiinvariant submanifolds of a generalized Hopf manifold, Bull. Math. de la Soc. Sci. Math. de Roumanie, 34, (1990), 115-123, (impreuna cu S.Ianus), MR 91m:53039.
  42. Minimal real hypersurfaces of a generalized Hopf manifold, Analele St. Univ. "Al. I. Cuza" Iasi, 2, (1990), 137-142, MR 92i:53019.
  43. Complex hypersurfaces with planar geodesics in generalized Hopf manifolds, Mathematika Balkanica 3 (1989) 92-96, MR 90g:53072.
  44. Complex hypersurfaces of a generalized Hopf manifold, Publications de l'Inst. Math. (Beograd), 42, (1987), 123-129, (impreuna cu S.Ianus, K.Matsumoto) MR 89f:53079.
  45. On certain vector fields in locally conformal Kaehler manifolds, Bull. Yamagata Univ. Natur. Sci. 11 (1987), 335--344 (impreuna cu S.Ianus, K.Matsumoto). MR88b:53077.
  46. CR-submanifolds of a locally conformal Kaehler manifold, Demonstratio Mathematica, 19, (1986), 863-869, MR 90g:53072.
  47. Subvarietati CR-generice in S-varietati, Stud. Cerc. Mat. 36 (1984), 435-443. MR86j:53084.



Actualizat: 29 iulie 2007



2002 - 2015 -- Facultatea de Matematica si Informatica, Universitatea din Bucuresti
Str. Academiei nr. 14, sector 1, C.P. 010014, Bucuresti, Romania
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