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See detailReconnaissance en psychiatrie légale
Englebert, Jérôme ULg

Scientific conference (2017, March 15)

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See detailOffline Policy-search in Bayesian Reinforcement Learning
Castronovo, Michaël ULg

Doctoral thesis (2017)

This thesis presents research contributions in the study field of Bayesian Reinforcement Learning — a subfield of Reinforcement Learning where, even though the dynamics of the system are un- known, the ... [more ▼]

This thesis presents research contributions in the study field of Bayesian Reinforcement Learning — a subfield of Reinforcement Learning where, even though the dynamics of the system are un- known, the existence of some prior knowledge is assumed in the form of a distribution over Markov decision processes. In this thesis, two algorithms are presented: OPPS (Offline Prior- based Policy Search) and ANN-BRL (Artificial Neural Networks for Bayesian Reinforcement Learning), whose philosophy consists to analyse and exploit the knowledge available beforehand prior to interacting with the system(s), and which differ by the nature of the model they make use of. The former makes use of formula-based agents introduced by Maes et al. in (Maes, Wehenkel, and Ernst, 2012), while the latter relies on Artificial Neural Networks built via SAMME (Stagewise Additive Modelling using a Multi-class Exponential loss function) — an AdaBoost algorithm developed by Zhu et al. in (Zhu et al., 2009). Moreover, we also describe a comprehensive benchmark which has been created to compare Bayesian Reinforcement Learning algo- rithms. In real life applications, the choice of the best agent to fulfil a given task depends not only on their performances, but also on the computation times required to deploy them. This benchmark has been designed to identify the best algorithms by taking both criteria into account, and resulted in the development of an open-source library: BBRL (Benchmarking tools for Bayesian Reinforcement Learning) (https://github.com/mcastron/BBRL/wiki). [less ▲]

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See detailModelling of organic Rankine cycle power systems in off-design conditions: an experimentally-validated comparative study
Dickes, Rémi ULg; Dumont, Olivier ULg; Daccord, Rémi et al

in Energy (2017), 123

Because of environmental issues and the depletion of fossil fuels, the world energy sector is undergoing many changes toward increased sustainability. Among the many fields of research and development ... [more ▼]

Because of environmental issues and the depletion of fossil fuels, the world energy sector is undergoing many changes toward increased sustainability. Among the many fields of research and development, power generation from low-grade heat sources is gaining interest and the organic Rankine cycle (ORC) is seen as one of the most promising technologies for such applications. In this paper, it is proposed to perform an experimentally-validated comparison of different modelling methods for the off-design simulation of ORC-based power systems. To this end, three types of modelling paradigms (namely a constant-efficiency method, a polynomial-based method and a semi-empirical method) are compared both in terms of their fitting and extrapolation capabilities. Post-processed measurements gathered on two experimental ORC facilities are used as reference for the models calibration and evaluation. The study is first applied at a component level (i.e. each component is analysed individually) and then extended to the characterization of the entire organic Rankine cycle power systems. Benefits and limi- tations of each modelling method are discussed. The results show that semi-empirical models are the most reliable for simulating the off-design working conditions of ORC systems, while constant-efficiency and polynomial-based models are both demonstrating lack of accuracy and/or robustness. [less ▲]

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See detailA random walk in Machine Learning
Begon, Jean-Michel ULg

Conference given outside the academic context (2017)

Since the dawn of machine learning (ML), it hasn’t stop spreading into our everyday lives in new, creative ways. Why Google, Facebook, Amazon and the like have invested so much in ML recently? What can ... [more ▼]

Since the dawn of machine learning (ML), it hasn’t stop spreading into our everyday lives in new, creative ways. Why Google, Facebook, Amazon and the like have invested so much in ML recently? What can (and can’t) ML actually do for us? In this non-technical (and non-exhaustive) talk we will examine ML applications ranging from standard uses to some of the most exotic ones. [less ▲]

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Peer Reviewed
See detailEnolates in macromolecular science: current situation and future outlook
Lecomte, Philippe ULg; Jérôme, Christine ULg

in Zabicky, Jacob (Ed.) The Chemistry of Metal Enolates (Volume 2) (2017)

Detailed reference viewed: 31 (5 ULg)
See detailHieroglyphic encoding & hieroglyphic sign-lists. From the Ramses Project to the Thot Sign-List
Polis, Stéphane ULg

Scientific conference (2017, March 14)

Based on systematic observations regarding the encoding of hieroglyphs in an electronic corpus, specifically the Ramses corpus (ramses.ulg.ac.be), the aim of this presentation was to introduce and discuss ... [more ▼]

Based on systematic observations regarding the encoding of hieroglyphs in an electronic corpus, specifically the Ramses corpus (ramses.ulg.ac.be), the aim of this presentation was to introduce and discuss the data-model of the Thot Sign-List (under development at the university of Liège) and to present online resources made available for documenting the elements of this model (http://thot.philo.ulg.ac.be/index.html). Among the future goals is a strengthened collaboration between the AKU project and the Thot Sign-List (e.g., a shared hieroglyphic sign-list and a connection between the graphemes analysed by the AKU project and the texts of Ramses Online). [less ▲]

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See detailLa réalisation et les complications de la césarienne dans la race Blanc-bleu Belge
Djebala, Salem ULg; Casalta, Hélène ULg; Rao, Anne-Sophie ULg et al

Conference given outside the academic context (2017)

La césarienne est la chirurgie la plus couramment réalisée en Belgique. Bien que celle-ci soit une intervention de routine le taux de complications post-opératoires est non négligeable. Deux enquêtes ont ... [more ▼]

La césarienne est la chirurgie la plus couramment réalisée en Belgique. Bien que celle-ci soit une intervention de routine le taux de complications post-opératoires est non négligeable. Deux enquêtes ont été réalisées au près des éleveurs et des vétérinaires sur la préparation, le déroulement de la césarienne et les soins post-opératoires. Ces deux enquêtes nous ont permis de tirer des conclusions et formuler des recommandations afin de réduire le taux de complication. [less ▲]

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See detailEvaluation de la fonction rénale
DELANAYE, Pierre ULg

Conference (2017, March 14)

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See detailApport de l'ENMG aux syndromes douloureux diffus
WANG, François-Charles ULg

Scientific conference (2017, March 14)

Detailed reference viewed: 14 (1 ULg)
See detailFormation and characterization of artificial lipid bilayers on optical fibers
Toussaint, Pauline ULg; Dreesen, Laurent ULg

Conference (2017, March 14)

Transports across cellular membranes are at the basis of a lot of biological processes such as the transmission of information in neurons. Their characterization is therefore of crucial interest. As they ... [more ▼]

Transports across cellular membranes are at the basis of a lot of biological processes such as the transmission of information in neurons. Their characterization is therefore of crucial interest. As they are equivalent to biological membranes, artificial lipid bilayers can be created to study membranes and transmembrane proteins properties or transmembrane transports. The aim of this work is to develop a new method for the fabrication of artificial membranes based on the use of optical fibers as support for the bilayer, and for their characterization by fluorescence measurements. We use microfluidics on fibers to create two phospholipid monolayers that we approach close enough to form a bilayer. The membrane formation is checked using fluorescein or a fluorescent sodium probe, Tetra (tetramethylammonium) salt (sodium green), whose optical signal depends on sodium concentration. [less ▲]

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See detailQSAR models and the flexible regulation of chemicals
Thoreau, François ULg

Scientific conference (2017, March 14)

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See detailL'Europe à l'épreuve du populisme
Debras, François ULg

Conference given outside the academic context (2017)

Face aux élites nationales et internationales, politiques et économiques qui auraient confisqué le pouvoir aux citoyens, le populiste se présente comme le véritable défenseur du peuple. En faveur d'une ... [more ▼]

Face aux élites nationales et internationales, politiques et économiques qui auraient confisqué le pouvoir aux citoyens, le populiste se présente comme le véritable défenseur du peuple. En faveur d'une démocratie plus directe, plus proche du citoyen, le leader populiste s'oppose frontalement aux partis traditionnels jugés technocratiques, clientélistes, œuvrant au profit de certains intérêts particuliers et au détriment de l’intérêt général. Que signifie être populiste? Est-ce une idéologie ou une rhétorique? Quels partis, quelles personnalités politiques pouvons-nous qualifier de populistes? Le populisme est-il systématiquement opposé à la notion de démocratie, est-il "antisystème"? Au travers d'un tour de l'Europe et de certains partis en particulier, nous proposons d'apporter des clés de compréhension du populisme, un concept flou mais qui n'est certainement pas vide de sens. [less ▲]

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See detailRéflexions psychopathologiques sur la psychopathie
Englebert, Jérôme ULg

Scientific conference (2017, March 11)

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See detailImagerie très haute résolution en agriculture: potentialité de la technologie drone
Bauwens, Sébastien ULg

Conference given outside the academic context (2017)

Ces dix dernières années, l’émergence des drones civils ouvre de nouvelles perspectives dans divers domaines tels que la logistique, le secourisme, les médias, la foresterie et l'agriculture. Dans le ... [more ▼]

Ces dix dernières années, l’émergence des drones civils ouvre de nouvelles perspectives dans divers domaines tels que la logistique, le secourisme, les médias, la foresterie et l'agriculture. Dans le cadre de cette présentation, nous ferons le point sur le potentiel qu’offrent les images acquises par drone au niveau du secteur agricole et forestier. La réponse spectrale des plantes au rayonnement solaire sera abordée, les capteurs spectraux pour drones seront ensuite présentés ainsi que les différentes plateformes drone. Finalement, nous verrons le type d’information qui peut être extrait de ces images spectrales à partir de cas d’études agronomiques et forestiers. [less ▲]

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See detailMUNIX vs TASPM
WANG, François-Charles ULg

Conference (2017, March 10)

Detailed reference viewed: 11 (1 ULg)
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See detailUne méthode simple d'évaluation de l'excitabilité nerveuse ?
WANG, François-Charles ULg

Scientific conference (2017, March 10)

Detailed reference viewed: 12 (1 ULg)