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See detailA generic approach for solving nonlinear-discrete security-constrained power flow problems in large-scale systems
Platbrood, Ludovic; Capitanescu, Florin; Crisciu, Horia et al

in IEEE Transactions on Power Systems (2014), 29(3), 1194-1203

This paper proves the practicality of an iterative algorithm for solving realistic large-scale SCOPF problems. This algorithm is based on the combination of a contingency filtering scheme, used to ... [more ▼]

This paper proves the practicality of an iterative algorithm for solving realistic large-scale SCOPF problems. This algorithm is based on the combination of a contingency filtering scheme, used to identify the binding contingencies at the optimum, and a network compression method, used to reduce the complexity of the post-contingency models included in the SCOPF formulation. We show that by combining these two complementary ideas, it is possible to solve in a reasonable time SCOPF problems on large power system models with a large number of contingencies. Unlike most results reported for large-scale SCOPF problems, our algorithm uses a non-linear AC network model in both pre-contingency and post-contingency states, optimizes both active/reactive powers flows jointly, and treats the discrete variables. The proposed algorithm is implemented with state-of-the-art solvers and applied to two systems: a national grid with 2563 buses and 1297 contingencies, and a model of the European transmission network with 9241 buses and 12000 contingencies. [less ▲]

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See detailA generic approach to closed loop, digital transducers
Kraft, Michaël ULg; Lewis, Christopher P.

in Sensor 97 (1997)

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See detailA generic chemical platform for molecular recognition and stimuli-responsive probes based on scanning probe microscopy
Cecchet, Francesca; Lussis, Perrine ULg; Jérôme, Christine ULg et al

in Small : Nano Micro (2008), 4(8), 1101-1104

The grafting of poly-N-succinimidyl acrylate from scanning probe microscopy tips is shown to be a robust platform for the very easy elaboration of versatile probes with sensor capabilities and tunable ... [more ▼]

The grafting of poly-N-succinimidyl acrylate from scanning probe microscopy tips is shown to be a robust platform for the very easy elaboration of versatile probes with sensor capabilities and tunable properties. The modified tips can be easily postfunctionalized for single-molecule recognition of host-guest and ligand-receptor systems and for the design of smart probes that are thermo- and pH-responsive. [less ▲]

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See detailA Generic Chemical Platform for the Design of Versatile and 'Smart' SPM Probes
Duwez, Anne-Sophie ULg

Conference (2006, November 26)

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See detailA Generic Feature Selection Method for Background Subtraction Using Global Foreground Models
Braham, Marc ULg; Van Droogenbroeck, Marc ULg

in Advanced Concepts for Intelligent Vision Systems (2015, October)

Over the last few years, a wide variety of background subtraction algorithms have been proposed for the detection of moving objects in videos acquired with a static camera. While much effort have been ... [more ▼]

Over the last few years, a wide variety of background subtraction algorithms have been proposed for the detection of moving objects in videos acquired with a static camera. While much effort have been devoted to the development of robust background models, the automatic spatial selection of useful features for representing the background has been neglected. In this paper, we propose a generic and tractable feature selection method. Interesting contributions of this work are the proposal of a selection process coherent with the segmentation process and the exploitation of global foreground models in the selection strategy. Experiments conducted on the ViBe algorithm show that our feature selection technique improves the segmentation results. [less ▲]

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See detailGeneric image classification: random and convolutional approaches
Begon, Jean-Michel ULg

Master's dissertation (2014)

Supervised learning introduces genericity in the field of image classification, thus enabling fast progress in the domain. Genericity does not imply ease-of-use, however, and the best methods in term of ... [more ▼]

Supervised learning introduces genericity in the field of image classification, thus enabling fast progress in the domain. Genericity does not imply ease-of-use, however, and the best methods in term of accuracy, namely convolutional neural networks, suffer from its lack. In this master thesis, we propose an alternative approach relying on extremely randomized trees and random subwindow extraction combine with elements of the convolutional networks. We explore two modes of utilization of the forest: primarily a direct approach where the forest is the final classifier (ET-DIC) and to a lesser extent, a preprocessing step where the forest is used to build a visual dictionary but where the actual classification is undertaken by a support vector machine (ET-FL). We show that, in both modes, our scheme performs better than without using the convolutional network elements but we are not quite yet reaching their performances. The ET-DIC variant keeps more in the line of classification forest advantages but performs less well as far as accuracy is concerned. This is further highlighted by the remarkable stability of the ET-DIC mode. This stability accounts for the ease-of-use of the method but also prevents elaborated optimization. We were able to score an accuracy of 0.613 whereas the record for this mode without the convolutional network elements was of 0.5367. The ET-FL produces better results at the cost of a greater variability of accuracy due to the loss of the ability to favor the interesting filters and a greater overfitting, consequence of the loss of the ensemble smoothing effect. The accuracies range from 0.55 to 0.7431 depending on the choice of hyper-parameters. The computational cost of both methods is much greater than with a traditional forest, however. [less ▲]

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See detailA generic platform for SPM-based molecular recognition processes and stiluli-responsive probes
Gabriel, Sabine ULg; Jérôme, Christine ULg; Silva-Goncalves, Elsa et al

Poster (2006, May 18)

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See detailA Generic Platform for SPM-Based Molecular Recognition Processes and Stimuli-Responsive Probes
Gabriel, S.; Jérôme, Christine ULg; Silva-Goncalves, E. et al

Conference (2006, May 18)

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See detailGeneric results in classes of ultradifferentiable functions
Esser, Céline ULg

in Journal of Mathematical Analysis & Applications (2014), 413(1), 378391

Let E be a Denjoy Carleman class of ultradifferentiable functions of Beurling type on the real line that strictly contains another class F of Roumieu type. We show that the set S of functions in E that ... [more ▼]

Let E be a Denjoy Carleman class of ultradifferentiable functions of Beurling type on the real line that strictly contains another class F of Roumieu type. We show that the set S of functions in E that are nowhere in the class F is large in the topological sense (it is residual), in the measure theoretic sense (it is prevalent), and that SU{0} contains an infinite dimensional linear subspace (it is lineable). Consequences for the Gevrey classes are given. Similar results are also obtained for classes of ultradifferentiable functions defined imposing conditions on the Fourier Laplace transform of the function. [less ▲]

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See detailGeneric results in Denjoy-Carleman classes
Esser, Céline ULg

Poster (2013, September 09)

Denjoy-Carleman classes are spaces of smooth functions which satisfy growth conditions on their derivatives. We distinguish the class of ultradi fferentiable functions of Roumieu type and the class of ... [more ▼]

Denjoy-Carleman classes are spaces of smooth functions which satisfy growth conditions on their derivatives. We distinguish the class of ultradi fferentiable functions of Roumieu type and the class of ultradi fferentiable functions of Beurling typ. Endowed with its natural topology, the Beurling class is a Fr échet space. In the poster, we give a condition to have the strict inclusion of a Roumieu class into aBeurling class. We obtain then generic results about the set of functions of a Beurling class which are nowhere in a Roumieu class. Those generic results are obtained from three di fferent points of view: using the Baire category theorem, the notion of prevalence and the notion of lineability. We also study the particular case of Gevrey classes. [less ▲]

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See detailA Generic Service Interface for Cloud Networks
Sifalakis, Manolis; Tschudin, Christian; Martin, Sylvain ULg et al

in Leymann, Frank; Ivanov, Ivan; van Sinderen, Marten (Eds.) CLOSER (2011, May 09)

Two major challenges for enabling the vision of cloud computing regard (a) the generic and multi-purpose access to (virtualised) resources, and (b) the flexible, dynamic, and on-demand composition of ... [more ▼]

Two major challenges for enabling the vision of cloud computing regard (a) the generic and multi-purpose access to (virtualised) resources, and (b) the flexible, dynamic, and on-demand composition of services from virtual resources; from the service level, all the way ``down'' to the lamda level. Both aspects require a respective flexibility and expressibility from the interfaces in-place, which is missing from the current static socket (and other) interfaces below the application level. In this position paper, we propose, explain and exemplify an alternative generic and universal resource interface (GRI) that borrows from object oriented design to enable properties such as polymorphic access, generic service composition, introspection and dynamic reconfigurability, of in-network resources, opening in this way the path for flexible creation of service clouds. [less ▲]

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See detailGeneric systems for the enantioseparation of basic drugs in NACE using single-isomer anionic CDs
Rousseau, Anne ULg; Gillotin, Florian; Chiap, Patrice ULg et al

in Journal of Pharmaceutical & Biomedical Analysis (2011), 54

The enantioseparation of ten basic drugs was evaluated in NACE systems using heptakis(2-O-methyl-3-O-acetyl-6-O-sulfo)-β-CD (HMAS-β-CD). For this purpose, a D-optimal design with 21 experimental points ... [more ▼]

The enantioseparation of ten basic drugs was evaluated in NACE systems using heptakis(2-O-methyl-3-O-acetyl-6-O-sulfo)-β-CD (HMAS-β-CD). For this purpose, a D-optimal design with 21 experimental points was applied. Four antifungal agents (econazole, isoconazole, miconazole, sulconazole), three local anesthetics (bupivacaine, mepivacaine and prilocaine), two sympathomimetics (salbutamol and terbutaline) and one β-blocker (carvedilol) were selected as basic model analytes. The influence on the enantiomeric resolution of anionic CD and BGE anion concentrations as well as the BGE anion nature was investigated. For all studied analytes, the enantiomeric resolution was shown to be significantly influenced by the CD concentration. Based on the observed results, a generic NACE system was recommended, namely 20 mM HMAS-β-CD and 10 mM ammonium camphorSO3- in methanol acidified with 0.75 M formic acid. Moreover, this NACE system was compared to previous conditions with heptakis(2,3-di-O-methyl-6-O-sulfo)-β-CD (HDMS-β-CD) or heptakis(2,3-di-O-acetyl-6-O-sulfo)-β-CD (HDAS-β-CD). Finally, two generic systems using either HDAS-β-CD or HMAS-β-CD were proposed and evaluated for the enantioseparation of ketamine and norketamine after incubation of ketamine in phenobarbital-induced male rat liver microsomes systems. [less ▲]

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See detailGeneric systolic arrays: A methodology for systolic design
Gribomont, Pascal ULg; Van Dongen, Vincent

in TAPSOFT'93: Theory and Practice of Software Development (1993)

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See detailGenericity and classes of ultradifferentiable functions
Esser, Céline ULg

Conference (2014, September 26)

As surprising as it may seem, there exist infinitely differentiable functions which are nowhere analytic. When such an unexpected object is found, a natural question is to ask whether many similar ones ... [more ▼]

As surprising as it may seem, there exist infinitely differentiable functions which are nowhere analytic. When such an unexpected object is found, a natural question is to ask whether many similar ones may exist. A classical technique is to use the Baire category theorem and the notion of residuality. This notion is purely topological and does not give any information about the measure of the set of objects satisfying such a property. In this purpose, the notion of prevalence has been introduced. Moreover, one could also wonder whether large algebraic structures of such objects can be constructed. This question is formalized by the notion of lineability. The first objective of this talk is to go further into the study of nowhere analytic functions. It is known that the set of nowhere analytic functions is residual and lineable in C^infty([0, 1]). We prove that the set of nowhere analytic functions is also prevalent in this space. Those results of genericity are then generalized using Gevrey classes, which can be seen as intermediate between the space of analytic functions and the space of infinitely differentiable functions. We also study how far such results of genericity could be extended to spaces of ultradifferentiable functions, defined using weight sequences. [less ▲]

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See detailLe générique de faux documentaire. Approche critique d'un incitant à la lucidité du spectateur.
Hamers, Jérémy ULg

Conference (2013, June 26)

Parallèlement aux multiples commentaires cinéphiliques que le générique suscite depuis plusieurs années, les travaux récents qui lui sont consacrés l’envisagent comme un objet d’étude esthétique ... [more ▼]

Parallèlement aux multiples commentaires cinéphiliques que le générique suscite depuis plusieurs années, les travaux récents qui lui sont consacrés l’envisagent comme un objet d’étude esthétique, narratologique ou sémiologique à part entière. Selon ces études, le générique est un objet fragmentaire (placé majoritairement à partir des années 1960 « sur » les images du début ou de la fin d’un film) voire autonome (on connaît les auteurs spécialisés en réalisation de génériques), marginal aussi (rarement au centre de l’œuvre ; le « générique-préface » de de Mourgues), frontalier encore (dans et hors du film, ou plutôt : à son orée), qui fait office d’ouverture ou de clôture hybride du film. Appartenant à la fois à l’univers de la fiction et à « un autre espace-temps, réel, celui de la production » (Moinereau), le générique de début plus particulièrement sert à « enclencher la diégèse » (de Mourgues) mais aussi à lui résister. « [S]orte de zone franche entre le monde de la réalité et celui de la fiction » (Metz), il est une passerelle, une aide au passage, au basculement dans la fiction. En tant que point pivot bâtard, le générique de début – et non pas « du début », appellation qui sous-entendrait l’appartenance exclusive à un seul lieu –, joue en effet sur deux registres. D’une part il affiche la ou les paternités bien réelles de l’œuvre (jusqu’au début des années 1910 il ne satisfait bien souvent qu’à cette seule obligation légale) et leur rend hommage (graphismes et durées différenciées), ou, dans ses versions les plus sophistiquées, offre au cinéphile (auto-)références et private jokes qui établissent entre le spectateur et l’auteur réel une complicité néanmoins non fatale pour le récit de fiction. D’autre part il aide le spectateur à s’abandonner à l’illusion de la fiction qui doit « mentir sur ses conditions de production » (Comolli) et dont le générique est pourtant le premier symptôme. En somme, le générique de début n’est donc pas seulement hybride par son lieu, mais aussi en raison de sa fonction quasi paradoxale : il établit avec le spectateur un lien a priori adiégétique dont la fonction première est précisément de faciliter son entrée dans la diégèse. Compte tenu de l’intérêt particulier que ces études accordent à la nature hybride du générique, il n’est pas étonnant que les travaux auxquels nous nous référons ici concernent exclusivement des films de fiction. Car, à l’inverse, dans le cas du cinéma documentaire, l’ambivalence inhérente à ce « commutateur de diégèse » (Gardies) est, en principe, inexistante étant donné que le générique d’un film non-fictionnel renvoie le spectateur à un univers « uniquement » réel, commun à l’ensemble du discours filmique. Dans cette perspective, il ne sert donc a priori qu’à inaugurer un contrat spectatoriel ou à poser les fondements d’une convention de lecture qui s’épanouira et développera sa pleine puissance dans le film (installation du principal médiateur, authentification de l’énonciateur, etc.). En documentaire, pas de conflit donc entre un espace-temps « adiégétique » et le film, entre la marge et le texte, car tous deux convoquent des éléments appartenant in fine au même registre, celui du réel. C’est en substance ce que suggère l’approche sémio-pragmatique du documentaire en envisageant le générique de début comme le lieu dans lequel un « je-origine réel » (Odin), par le biais de médiations institutionnelles ou non, prend ses quartiers dans le texte, ouvrant ainsi la voie à une « lecture documentarisante » incontestée dans la suite du film. Les paradigmes trop rapidement évoqués ici révèlent leurs limites dès lors qu’on les confronte à quelques sous-genres particulièrement pratiqués et populaires aujourd’hui tels que le faux documentaire, le docufiction, le mockumentary et le programme de télé-réalité. Se jouant précisément d’un contrat de lecture unilatéral et libre de tout malentendu, ces sous-genres documentaires brouillent la binarité posée par l’approche sémio-pragmatique (« documentarisant » vs « fictionalisant »). Notre analyse de quelques génériques, prégénériques et séquences d’annonce de faux documentaires, de mockumentaries et d’émissions de télé-réalité nous amène à redéfinir le contrat de lecture et les conventions qui y sont liées, propres au cinéma et à la télévision de non-fiction. Ces génériques ne contribuent pas à l’identification par le spectateur d’un énonciateur considéré comme réel (par jeu ou par conviction), mais établissent un nouvel accord tacite et flou entre un auteur reconnu comme fictif (ou ses avatars particulièrement nombreux dans le cas du mockumentary et de la télé-réalité) et le spectateur. Ce nouvel accord vise en réalité à produire l’adhésion forcée d’un spectateur qui pourtant sait qu’il n’est pas dupe, ou croit le savoir. Dans ce sens, le générique apparaît alors comme un lieu crucial pour toute analyse critique du discours non fictionnel : un lieu qui conteste l’authenticité de l’énonciateur et qui nie le crédit accordé au médiateur documentaire, pour offrir au public l’illusion de sa lucidité et le pousser ensuite vers une adhésion sans réserve à un jeu de réel. En somme, une étape indispensable à la constitution d’une crédulité paradoxale du spectateur. [less ▲]

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See detailLe générique de faux documentaire. Un incitant à la lucidité paradoxale du spectateur.
Hamers, Jérémy ULg

in Saint-Amand, Denis; Dozo, Björn-Olav; Luneau, Marie-Pier (Eds.) Jeux et enjeux de la préface (in press)

Detailed reference viewed: 55 (13 ULg)