A new fuzzy set merging technique using inclusion-based fuzzy clustering

This paper proposes a new method of merging parameterized fuzzy sets based on clustering in the parameters space, taking into account the degree of inclusion of each fuzzy set in the cluster prototypes. The merger method is applied to fuzzy rule base simplification by automatically replacing the fuzzy sets corresponding to a given cluster with that pertaining to cluster prototype. The feasibility and the performance of the proposed method are studied using an application in mobile robot navigation. The results indicate that the proposed merging and rule base simplification approach leads to good navigation performance in the application considered and to fuzzy models that are interpretable by experts. In this paper, we concentrate mainly on fuzzy systems with Gaussian membership functions, but the general approach can also be applied to other parameterized fuzzy sets

Using the clustering coefficient to guide a genetic-based communities finding algorithm

The final publication is available at Springer via http://dx.doi.org/10.1007/978-3-642-23878-9_20Proceedings of 12th International Conference IDEAL, Norwich, UK, September 7-9, 2011.We describe an approach taken for automatically associating entries from an on-line encyclopedia with concepts in an ontology or a lexical semantic network. It has been tested with the Simple English Wikipedia and WordNet, although it can be used with other resources. The accuracy in disambiguating the sense of the encyclopedia entries reaches 91.11% (83.89% for polysemous words). It will be applied to enriching ontologies with encyclopedic knowledge

Mesure statistique de la résistance de contact d’une grille sérigraphiée pour cellules solaires au silicium multicristallin

La métallisation par sérigraphie est une des étapes les plus importantes dans la technologie d’élaboration des cellules solaires pour une production à grande échelle. Néanmoins, elle demeure dépendante de plusieurs paramètres variables. Pour le silicium multi cristallin, tout changement dans le procédé de réalisation des cellules solaires influence directement l’optimisation du profil de recuit de la métallisation par sérigraphie. Les plaquettes de silicium multi cristallin subissent toutes les étapes classiques de réalisation des cellules solaires comme le nettoyage chimique et la décontamination, une diffusion au phosphore et le dépôt du nitrure de silicium SiNx par PECVD (Plasma Enhanced Chemical Vapor Deposition). Il y a juste le dépôt du contact Argent Ag sur la face avant de la plaquette. Nous avons utilisé la pâte de sérigraphie Ag Ferro 3349. La grille métallique comporte six (06) motifs TLM (Transfer Length Method) pour les mesures de la résistance de contact. Le principal but de ce travail est le contrôle de la qualité du contact Ag/SiNx/n+-Si dans les cellules solaires au silicium multicristallin. Les mesures TLM révèlent une cartographie des valeurs de la résistance de contact pour chaque température. Le profil optimal de température de recuit est autour de 750 °C

Characterisation of temperature dependent parameters of multi-quantum well (MQW) Ti/Au/n-AlGaAs/n-GaAs/n-AlGaAs Schottky diodes

Forward and reverse current-voltage (IV) of Ti/Au/n-Al0.33Ga0.67As/n-GaAs/n-Al0.33Ga0.67As multi-quantum well (MQW) Schottky diodes were measured over a range of temperatures from 20 to 400 K by a step of 20 K. The Schottky diodes parameters were then extracted from these characteristics. The Cheung method is used for this purpose, assuming a thermionic conduction mechanism. The extracted ideality factor decrease with increasing temperatures. But their values at low temperatures were found to be unrealistic. In order to explain this uncertainty, three assumptions were explored. Firstly an assumed inhomogeneous barrier height gave better parameters especially the Richardson constant but the ideality factor is still unrealistic at low temperatures. Secondly, by using numerical simulation, it was demonstrated that defects including interface states are not responsible for the apparent unrealistic Schottky diode parameters. The third assumption is the tunnelling mechanism through the barrier in the low temperature range. At these lower temperatures, the tunnelling mechanism was more suitable to explain the extracted parameters values

Toward a General Framework for Information Fusion

National audienceDepending on the representation setting, different combination rules have been proposed for fusing information from distinct sources. Moreover in each setting, different sets of axioms that combination rules should satisfy have been advocated, thus justifying the existence of alternative rules (usually motivated by situations where the behavior of other rules was found unsatisfactory). These sets of axioms are usually purely considered in their own settings, without in-depth analysis of common properties essential for all the settings. This paper introduces core properties that, once properly instantiated, are meaningful in different representation settings ranging from logic to imprecise probabilities. The following representation settings are especially considered: classical set representation, possibility theory, and evidence theory, the latter encompassing the two other ones as special cases. This unified discussion of combination rules across different settings is expected to provide a fresh look on some old but basic issues in information fusion

On Wordsense Disambiguation Through Morphological Transformation and Semantic Distance and Domain link knowledge

AbstractDespite the advances in information processing systems, word-sense disambiguation tasks are far to be satisfactory as testified by numerous limitations of current translation systems and text inference systems. This paper attempts to investigate new techniques in knowledge based word-sense disambiguation field. First, by exploring the WordNet lexical database and part-of-speech conversion through the established CatVar database that translates all non-noun words into their noun counterparts, and following the spirit of Lesk’s disambiguation algorithm, a new disambiguation algorithm that maximizes the overall semantic similarity in the sense of Wu and Palmer measure between each sense of the target word and synsets of words of the context, is established. Second, motivated by the existence of WordNet domains for individual synsets, an overlapping based approach that quantifies the set intersection of synset domains, if not empty, or the hierarchy structure of the domains links through a simple path-length measure is put forward. Third, instead of exploring the whole set of words involved in the context, a selective approach that uses syntactic feature as outputted by Stanford Parser and a fixed length windowing is developed. The developed algorithms are evaluated according to two commonly employed dataset where a clear improvement to the baseline algorithm has been acknowledged.Abstract Despite the advances in information processing systems, word-sense disambiguation tasks are far to be satisfactory as testified by numerous limitations of current translation systems and text inference systems. This paper attempts to investigate new techniques in knowledge based word-sense disambiguation field. First, by exploring the WordNet lexical database and part-of-speech conversion through the established CatVar database that translates all non-noun words into their noun counterparts, and following the spirit of Lesk’s disambiguation algorithm, a new disambiguation algorithm that maximizes the overall semantic similarity in the sense of Wu and Palmer measure between each sense of the target word and synsets of words of the context, is established. Second, motivated by the existence of WordNet domains for individual synsets, an overlapping based approach that quantifies the set intersection of synset domains, if not empty, or the hierarchy structure of the domains links through a simple path-length measure is put forward. Third, instead of exploring the whole set of words involved in the context, a selective approach that uses syntactic feature as outputted by Stanford Parser and a fixed length windowing is developed. The developed algorithms are evaluated according to two commonly employed dataset where a clear improvement to the baseline algorithm has been acknowledged

MAuto : Automatic Mobile Game Testing Tool Using Image‑Matching Based Approach

AbstractThe exponential increase in the speed of the mobile industry has led to a decreasing quality in many associated mobile apps. Besides, the number of distinct Android devices reached thousands. This challenged the development of universally accepted test applications that can run on all devices. This paper focuses on the development of a new mobile game testing framework, referred to, MAuto. MAuto records the user actions in the game and replays the tests on any Android device. MAuto uses image recognition, through AKAZE features, to record the test cases and the Appium framework to replay the user actions automatically. The feasibility of the developed tool has been demonstrated through testing on the Clash of Clans mobile game.Abstract The exponential increase in the speed of the mobile industry has led to a decreasing quality in many associated mobile apps. Besides, the number of distinct Android devices reached thousands. This challenged the development of universally accepted test applications that can run on all devices. This paper focuses on the development of a new mobile game testing framework, referred to, MAuto. MAuto records the user actions in the game and replays the tests on any Android device. MAuto uses image recognition, through AKAZE features, to record the test cases and the Appium framework to replay the user actions automatically. The feasibility of the developed tool has been demonstrated through testing on the Clash of Clans mobile game

Exotic ants from the Maghreb (Hymenoptera, Formicidae) with first report of the hairy alien ant Nylanderia jaegerskioeldi (Mayr) in Algeria

Exotic ants from the Maghreb (Hymenoptera, Formicidae) with first report of the Hairy Alien Ant Nylanderia jaegerskioeldi (Mayr) in Algeria.- We compiled 16 exotic ant species found in the Maghreb in wild ecosystems, gardens and urban areas. Five of these introduced species are considered major ecological and agricultural household pest species that have become established above all in Morocco. During our investigation in a citrus orchard of ITMAS Heuraoua, Algiers, we detected two exotic ants, Nylanderia jaegerskioeldi (Mayr, 1904) and Strumigenys membranifera Emery, 1869, plus nine native ant species. The Formicinae ant N. jaegerskioeldi is recorded for the first time in Algeria, taking the number of exotic ants in the country to 11. This is the fourth known record in North Africa. A brief comparison between the exotic ant fauna of Algeria, Morocco, Tunisia and neighboring countries highlights the need to improve the limited knowledge of ants in North Africa.Hormigas exóticas del Magreb (Hymenoptera, Formicidae) con primer registro de la hormiga velluda alóctona Nylanderia jaegerskioeldi (Mayr) en Argelia. Documentamos 16 especies exóticas de hormigas distribuidas en ecosistemas naturales, jardines y áreas urbanas del Magreb. Cinco de las especies introducidas y establecidas constituyen plagas importantes desde los puntos de vista ecológico, agrícola y doméstico, especialmente en Marruecos. Durante nuestra investigación en una huerta de cítricos de ITMAS Heuraoua, Argel, registramos dos hormigas exóticas, Nylanderia jaegerskioeldi (Mayr, 1904) y Strumigenys membranifera Emery, 1869, así como nueve especies de hormigas autóctonas. La hormiga N. jaegerskioeldi, de la subfamilia Formicinae, fue registrada por primera vez en Argelia, lo que eleva a 11 el número de hormigas exóticas presentes en el país. Este es el cuarto registro conocido en el Norte de África. Una breve comparación entre la fauna de hormigas exóticas de Argelia, Marruecos, Túnez y países vecinos pone de relieve la necesidad de mejorar el limitado conocimiento sobre las hormigas en el Norte de África.Formigues exòtiques del Magrib (Hymenoptera, Formicidae) amb primer registre de la formiga peluda al·lòctona Nylanderia jaegerskioeldi (Mayr) a Algèria. Documentem 16 espècies exòtiques de formigues distribuïdes en ecosistemes naturals, jardins i àrees urbanes del Magrib. Cinc de les espècies introduïdes i establertes constitueixen plagues importants des dels punts de vista ecològic, agrícola i domèstic, especialment al Marroc. Durant la nostra recerca en una horta de cítrics d'ITMAS Heuraoua, Alger, vam registrar dues formigues exòtiques, Nylanderia jaegerskioeldi (Mayr, 1904) i Strumigenys membranifera Emery, 1869, així com nou espècies de formigues autòctones. La formiga N. jaegerskioeldi, de la subfamília Formicinae, va ser registrada per primera vegada a Algèria, cosa que eleva fins a 11 el nombre de formigues exòtiques presents al país. Aquest és el quart registre conegut al Nord d'Àfrica. Una breu comparació entre la fauna de formigues exòtiques d'Algèria, el Marroc, Tunísia i els països veïns posa en relleu la necessitat de millorar el limitat coneixement sobre les formigues al Nord d'Àfrica