Représentation à base de connaissance pour une méthode de classification transductive de document multilangue

International audienceMultilingual document classification is often addressed by approaches that rely on language-specific resources (e.g., bilingual dictionaries and machine translation tools) to evaluate cross-lingual document similarities. However, the required transformations may alter the original document semantics, raising additional issues to the known difficulty of obtaining high-quality labeled datasets. To overcome such issues we propose a new framework for multilingual document classification under a transductive learning setting. We exploit a large-scale multilingual knowledge base, BabelNet, to support the modeling of different language-written documents into a common conceptual space, without requiring any language translation process. We resort to a state-of-the-art transductive learner to produce the document classification. Results on two real-world multilingual corpora have highlighted the effectiveness of the proposed document model w.r.t. document representations usually involved in multilingual and cross-lingual analysis, and the robustness of the transductive setting for multilingual document classification

On the comparison of oxygen and sulfur transfer reactivities in phosphine and phosphorene: the case of R3Sb(X) carriers (X = O or S).

A mediated approach for an efficient metal covalent functionalization of the phosphorene surface is presented through the selective insertion of chalcogen atoms. Electronic and steric requirements have been evaluated in details

Synthesis and Structural Characterization of a Tetranuclear Zinc(II) Complex with P,P'-Diphenylmethylenediphosphinate (pcp) and 2,2'-Bipyridine (2,2'-bipy) Ligands

A new tetranuclear complex of zinc(II) with P,P′-diphenylmethylenediphosphinate and 2,2′- bipyridine ligands was synthesized. [(pcp)(2,2′-bipy)Zn (μ3-pcp)Zn (2,2′-bipy)]2 · 6H2O was characterized by elemental analysis, IR spectroscopy, thermogravimetric analysis and X-ray diffractometry. The structure consists of tetranuclear complexes connected through water hydrogen-bonding interactions in corrugated 2D layers. Two crystallographically independent zinc ions are in a distorted five-coordinate environment, being surrounded by three oxygen atoms of phosphinate groups (from two pcp ligands) and by two bipy nitrogen donors. Of the two independent pcp anions the first one utilizes all of its oxygen donors to coordinate one metal as bidentate and two metal atoms as a monodentate ligand, whereas the second one is only bidentate for one metal atom

MultiLingMine 2016: Modeling, Learning and Mining for Cross/Multilinguality. In: Advances in Information Retrieval

The final publication is available at Springer via http://dx.doi.org/10.1007/978-3-319-30671-1 83The increasing availability of text information coded in many different languages poses new challenges to modern information retrieval and mining systems in order to discover and exchange knowledge at a larger world-wide scale. The 1st International Workshop on Modeling, Learning and Mining for Cross/Multilinguality (dubbed MultiLingMine 2016) provides a venue to discuss research advances in cross-/multilingual related topics, focusing on new multidisciplinary research questions that have not been deeply investigated so far (e.g., in CLEF and related events relevant to CLIR). This includes theoretical and experimental on-going works about novel representation models, learning algorithms, and knowledge-based methodologies for emerging trends and applications, such as, e.g., cross-view cross-/multilingual information retrieval and document mining, (knowledge-based) translation-independent cross-/multilingual corpora, applications in social network contexts, and more.Ienco, D.; Roche, M.; Romeo, S.; Rosso, P.; Tagarelli, A. (2016). MultiLingMine 2016: Modeling, Learning and Mining for Cross/Multilinguality. In: Advances in Information Retrieval. En Advances in Information Retrieval. Springer Verlag (Germany). 869-873. doi:10.1007/978-3-319-30671-1_83S869873Bandyopadhyay, S., Poibeau, T., Saggion, H., Yangarber, R.: Proceedings of the Workshop on Multi-source Multilingual Information Extraction and Summarization (MMIES). ACL (2008)Chiarcos, C., McCrae J.P., Montiel, E., Simov, K., Branco, A., Calzolari, N., Osenova, P., Slavcheva, M., Vertan, C.: Proceedings of the 3rd Workshop on Linked Data in Linguistics: Multilingual Knowledge Resources and NLP (LDL) (2014)McCrae, J.P., Vulcu, G.: CEUR Proceedings of the 4th Workshop on the Multilingual Semantic Web (MSW4), vol. 1532 (2015)Moens, M.-F., Vulié, I.: Multilingual probabilistic topic modeling and its applications in web mining and search. In: Proceedings of the 7th ACM WSDM Conference (2014)Steichen, B., Ferro, N., Lewis, D., Chi, E.E.: Proceedings of the International Workshop on Multilingual Web Access (MWA) (2015)The CLEF Initiative. http://www.clef-initiative.eu

Modelling Strategies for the Covalent Functionalization of 2D Phosphorene

The paper is an excursus on potential acid-base adducts formed by an unsaturated main group or transition metal species and P atoms of phosphorene (P n ), which derives from the black phosphorus exfoliation. Various possibilities of attaining a realistic covalent functionalization of the 2D material have been examined via DFT solid state calculations. The distribution of neighbor P atoms at one side of the sheet and the reciprocal directionalities of their lone pairs must be clearly understood to foreshadow the best possible acceptor reactants. Amongst the latter, the main group BH 3 or I 2 species have been examined for their intrinsic acidity, which favors the periodic mono-hapto anchoring at P n atoms. The corresponding adducts are systematically compared with other molecular P donors from a phosphine to white phosphorus, P 4 . Significant variations emerge from the comparison of the band gaps in the adducts and the naked phosphorene with a possible electronic interpretation being offered. Then, the P n covalent functionalization has been analyzed in relation to unsaturated metal fragments, which, by carrying one, two or three vacant hybrids, may interact with a different number of adjacent P atoms. For the modelling, the concept of isolobal analogy is important for predicting the possible sets of external coligands at the metal, which may allow the anchoring at phosphorene with a variety of hapticities. Structural, electronic, spectroscopic and energy parameters underline the most relevant pros and cons of some new products at the 2D framework, which have never been experimentally characterized but appear to be reasonably stable