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See detailGénéralisation Min Max pour l'Apprentissage par Renforcement Batch et Déterministe : Relaxations pour le Cas Général T Etapes
Fonteneau, Raphaël ULg; Ernst, Damien ULg; Boigelot, Bernard ULg et al

in 8èmes Journées Francophones de Planification, Décision et Apprentissage pour la conduite de systèmes (JFPDA'13) (2013)

Cet article aborde le problème de généralisation minmax dans le cadre de l'apprentissage par renforcement batch et déterministe. Le problème a été originellement introduit par [Fonteneau, 2011], et il a ... [more ▼]

Cet article aborde le problème de généralisation minmax dans le cadre de l'apprentissage par renforcement batch et déterministe. Le problème a été originellement introduit par [Fonteneau, 2011], et il a déjà été montré qu'il est NP-dur. Deux schémas de relaxation pour le cas deux étapes ont été présentés aux JFPDA'12, et ce papier présente une généralisation de ces schémas au cas T étapes. Le premier schéma fonctionne en éliminant des contraintes afin d'obtenir un problème soluble en temps polynomial. Le deuxième schéma est une relaxation lagrangienne conduisant également à un problème soluble en temps polynomial. On montre théoriquement que ces deux schémas permettent d'obtenir de meilleurs résultats que ceux proposés par [Fonteneau, 2011]. [less ▲]

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See detailGénéralisation min max pour l'apprentissage par renforcement batch et déterministe : schémas de relaxation
Fonteneau, Raphaël ULg; Ernst, Damien ULg; Boigelot, Bernard ULg et al

in Septièmes Journées Francophones de Planification, Décision et Apprentissage pour la conduite de systèmes (JFPDA 2012) (2012, May)

On s’intéresse au problème de généralisation min max dans le cadre de l’apprentissage par renforcement batch et déterministe. Le problème a été originellement introduit par Fonteneau et al. (2011). Dans ... [more ▼]

On s’intéresse au problème de généralisation min max dans le cadre de l’apprentissage par renforcement batch et déterministe. Le problème a été originellement introduit par Fonteneau et al. (2011). Dans un premier temps, on montre que le problème est NP-dur. Dans le cas où l’horizon d’optimisation vaut 2, on développe deux schémas de relaxation. Le premier schéma fonctionne en éliminant des contraintes de telle sorte qu’on obtienne un problème soluble en temps polynomial. Le deuxième schéma est une relaxation Lagrangienne conduisant à un problème conique-quadratique. On montre théoriquement et empiriquement que ces deux schémas permettent d’obtenir de meilleurs résultats que ceux proposés par Fonteneau et al. (2011). [less ▲]

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See detailThe generalist pollination system and reproductive success of Calluna vulgaris
Mahy, Grégory ULg; De Sloover, Jacques; Jacquemart, Anne Laure

in Canadian Journal of Botany (1999), 76

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See detailGeneralist vs specialist ? That's the question
Hanzen, Christian ULg

Conference given outside the academic context (2003)

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See detailLes généralistes : De bons acteurs en prévention ? Analyse d’une échelle d’attitude
Vanmeerbeek, Marc ULg

Conference (2010, June 24)

La prévention est le parent pauvre de la médecine : dispersion des acteurs entre agences spécialisées et soignants de terrain, entre niveaux de pouvoir, faibles moyens financiers et faibles résultats ... [more ▼]

La prévention est le parent pauvre de la médecine : dispersion des acteurs entre agences spécialisées et soignants de terrain, entre niveaux de pouvoir, faibles moyens financiers et faibles résultats objectivés. Les généralistes sont ils des acteurs incontournables ? Entre la prévention opportuniste durant leurs consultations et les grandes campagnes de santé publique, ont-ils envie de créer une troisième voie : opérateurs autonomes organisés pour leur patientèle et relais efficaces d’actions collectives ? L’avis d’un échantillon de généralistes belges francophones est étudié par une échelle d’attitude. Quarante indicateurs situent les répondants sur trois axes principaux et deux axes secondaires : 1. Des soins à la santé La globalité de la santé est-elle abordée aussi systématiquement en prévention que dans le domaine curatif où la plainte du patient sert de déclencheur ? 2. De l’individuel au collectif, face aux patients Les généralistes se sentent-ils responsables de la communauté de leurs patients, prise comme un ensemble ? Sont-ils prêts à intégrer de nouvelles compétences dans les domaines de la gestion des données générées par l’activité clinique ? • Axe secondaire : l’évaluation de pratique Les généralistes trouvent-ils de la satisfaction dans leur métier avec des méthodes de travail et des indicateurs provenant du monde de la santé publique ? 3. De l’individuel au collectif, face aux autres acteurs en santé Les généralistes manquent de temps. Sont ils prêts à déléguer à des tâches à des paramédicaux ou du personnel administratif, à collaborer avec des acteurs en promotion de la santé ? • Axe secondaire : les généralistes face à l’organisation de la santé publique Les généralistes voient-ils dans les structures de santé publique des partenaires fiables ? [less ▲]

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See detailLes généralistes, la prévention et la promotion de la santé. Etat des lieux, attitudes actuelles et voies d’avenir
Vanmeerbeek, Marc ULg

Doctoral thesis (2014)

The aim of this work was to identify ways to apply preventive health services provided by general practitioners to health improvement, rather than case-by-case improvements of biomedical markers. Health ... [more ▼]

The aim of this work was to identify ways to apply preventive health services provided by general practitioners to health improvement, rather than case-by-case improvements of biomedical markers. Health was considered within its bio-psycho-social definition, and equity in health had to be maintained or improved in this process. Research questions: • What are general practitioners (GPs)’ representations of their role and actions in the Belgian preventive framework? (Chapter 2); • What factors can predict GPs’ involvement to a greater or lesser degree in this topic? (Chapter 3); • What are the published operating models about preventive health care and health promotion in primary care that can be used to formulate working hypotheses for the improvement of preventive clinical practice? (Chapter 4). • How to improve the connection between preventive health services, health promotion and the curative approach? (Chapter 5). Four studies are presented that illustrate the topic, as they were published (or under publication). Among the definitions of health, the weight of the structural determinants and the socio-economic context on health levels was stressed, while the weight of the health systems was gradually reduced to a lesser role. But patient education is still expected to help control the individual determinants of health. Primary care and general practice are adequately fit to a tailored approach of large populations. However, the physicians’ vocational training does not address integration of health promotion and curative practice. Meeting field GPs through individual semi-structured interviews allowed for a dialog that explored various aspects of the preventive health services delivery. Predisposing factors closely linked to the physicians’ personality appeared to be determinants. Organisational limitations and difficulties, and almost non-existent collective visions of the practice population were highlighted. To understand what shapes the behaviour of GPs in preventive healthcare delivery beyond statements, an attitude scale was devised. The analysis allowed the statements to be sorted into a four-factor model consisting of performance appraisal, guideline adherence, patient-centeredness & collaboration, and power sharing. The GPs’ attitudes towards preventative service delivery increased with multidisciplinary practice and decreased with seniority in the profession. A narrative literature review retrieved twelve models that address preventive health care and health promotion in primary care; these models helped formulate working hypotheses for the improvement the current situation. The models progressively integrated elements from the health promotion charters of the World Health Organisation and from the Commission on Social Determinants of Health. The following elements valued by health promotion could be integrated to preventive healthcare: empowerment of citizens, addressing community environment; increased involvement in local health professionals’ networks; and the integration of individual and collective approaches within the same health care facilities to simultaneously address individual customisation, efficiency and equity objectives. There was little room for patients in elaborating the models. Do GPs have the opportunity to develop the partnerships that are required to move to health promotion as proposed by these models? The trend toward quality assurance systems among health systems can contribute to the setting of structures and operating modes that are necessary. The quality cycle could be one of the tools used for that purpose. The quality criteria of primary care lead the way to a framework for integrating preventive health care and health promotion. • Comprehensive care addresses the bio-psycho-social environment of patients, considering patients as partners during the health care process. • Continuity of care challenges the managing of clinical data between members of a care team, thereby enhancing quality of care, patient safety and equity. • Integrated care involving caregivers and health promotion professionals will require adaptation of job description reference lists. The challenge created by these three quality criteria entails changes in GPs vocational training and necessitates a new definition of their specific tasks and skills. Such a challenge requires collaborative teamwork of the five members of Boelen’s “partnership pentagon”. The social accountability of medical schools should be fostered. [less ▲]

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See detailGeneralization of automatic sequences for numeration systems on a regular language
Rigo, Michel ULg

in Theoretical Computer Science (2000), 244

Let L be an infinite regular language on a totally ordered alphabet (Σ,<). Feeding a finite deterministic automaton (with output) with the words of L, enumerated lexicographically with respect to <, leads ... [more ▼]

Let L be an infinite regular language on a totally ordered alphabet (Σ,<). Feeding a finite deterministic automaton (with output) with the words of L, enumerated lexicographically with respect to <, leads to an infinite sequence over the output alphabet of the automaton. This process generalizes the concept of k-automatic sequence for abstract numeration systems on a regular language (instead of systems in base k). Here, we study the first properties of these sequences and their relations with numeration systems. [less ▲]

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See detailA Generalization of Cobham's Theorem to Automata over Real Numbers
Boigelot, Bernard ULg; Brusten, Julien ULg

in Lecture Notes in Computer Science (2007, July), 4596

This paper studies the expressive power of finite-state automata recognizing sets of real numbers encoded positionally. It is known that the sets that are definable in the first-order additive theory of ... [more ▼]

This paper studies the expressive power of finite-state automata recognizing sets of real numbers encoded positionally. It is known that the sets that are definable in the first-order additive theory of real and integer variables (R, Z, +, <) can all be recognized by weak deterministic Büchi automata, regardless of the encoding base r > 1. In this paper, we prove the reciprocal property, i.e., that a subset of R that is recognizable by weak deterministic automata in every base r > 1 is necessarily definable in (R, Z, +, <). This result generalizes to real numbers the well-known Cobham's theorem on the finite-state recognizability of sets of integers. Our proof gives interesting insight into the internal structure of automata recognizing sets of real numbers, which may lead to efficient data structures for handling these sets. [less ▲]

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See detailA generalization of Cobham's theorem to automata over real numbers
Boigelot, Bernard ULg; Brusten, Julien ULg

in Theoretical Computer Science (2009), 410(18), 1694-1703

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See detailGeneralization of Den Hartog's Equal-Peak Method for nonlinear primary systems
Habib, Giuseppe ULg; Detroux, Thibaut ULg; Kerschen, Gaëtan ULg

in Proceedings of the International Conference on Structural Nonlinear Dynamics and Diagnosis (2014)

This study addresses the mitigation of one problem nonlinear resonance of a mechanical system. In view of the narrow bandwidth of the classical linear tuned vibration absorber, a new nonlinear absorber ... [more ▼]

This study addresses the mitigation of one problem nonlinear resonance of a mechanical system. In view of the narrow bandwidth of the classical linear tuned vibration absorber, a new nonlinear absorber, termed the nonlinear tuned vibration absorber (NLTVA), is introduced in this paper. One unconventional aspect of the NLTVA is that the mathematical form of its restoring force is tailored according to the nonlinear restoring force of the primary system. The NLTVA parameters are then determined using a nonlinear generalization of Den Hartog's equal-peak method. The mitigation of the resonant vibrations of a Duffing oscillator is considered to illustrate the proposed developments. [less ▲]

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See detailA Generalization of Semenov's Theorem to Automata over Real Numbers
Boigelot, Bernard ULg; Brusten, Julien ULg; Leroux, Jérôme

in Lecture Notes in Artificial Intelligence (2009), 5663

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See detailA generalization of the Snu spaces: getting rid of dyadic scales
Kleyntssens, Thomas ULg; Nicolay, Samuel ULg

Conference (2015, June 16)

The Snu spaces have been introduced by S. Jaffard to develop a new multifractal formalism that allows to improve the study of irregular functions. This type of formalism is connected to Besov spaces. From ... [more ▼]

The Snu spaces have been introduced by S. Jaffard to develop a new multifractal formalism that allows to improve the study of irregular functions. This type of formalism is connected to Besov spaces. From a theoretical point of view, the Snu spaces gave birth to counterexamples in functional analysis. In this talk, I present the first results on a generalization of these spaces. I also present some links between these new spaces and the generalized Besov spaces defined with wavelet coefficients. [less ▲]

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See detailGeneralized (m, k)-Zipf law for fractional Brownian motion-like time series with or without effect of an additional linear trend
Bronlet, Philippe ULg; Ausloos, Marcel ULg

in International Journal of Modern Physics C (2003), 14(3), 351-365

We have translated fractional Brownian motion (FBM) signals into a text based on two "letters", as if the signal fluctuations correspond to a constant stepsize random walk. We have applied the Zipf method ... [more ▼]

We have translated fractional Brownian motion (FBM) signals into a text based on two "letters", as if the signal fluctuations correspond to a constant stepsize random walk. We have applied the Zipf method to extract the zeta' exponent relating the word frequency and its rank on a log-log plot. We have studied the variation of the Zipf exponent(s) giving the relationship between the frequency of occurrence of words of length m < 8 made of such two letters: zeta' is varying as a power law in terms of m. We have also searched how the zeta' exponent of the Zipf law is influenced by a linear trend and the resulting effect of its slope. We can distinguish finite size effects, and results depending whether the starting FBM is persistent or not, i.e., depending on the FBM Hurst exponent H. It seems then numerically proven that the Zipf exponent of a persistent signal is more influenced by the trend than that of an antipersistent signal. It appears that the conjectured law zeta' = \2H - 1\ only holds near H = 0.5. We have also introduced considerations based on the notion of a time dependent Zipf law along the signal. [less ▲]

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See detailA generalized algorithm for efficient photometric reductions
Manfroid, Jean ULg; Heck, A.

in Astronomy and Astrophysics (1983), 120

The authors present a generalized method applicable to the reduction of photometric observations in any well-defined system. The method is characterized by the use of practically every measurement of any ... [more ▼]

The authors present a generalized method applicable to the reduction of photometric observations in any well-defined system. The method is characterized by the use of practically every measurement of any non-variable star in the reduction procedure. Its main advantages are a greater accuracy and a substantial saving of observing time on extinction and standard stars. A particular case of application to the uvby system is detailed and discussed. [less ▲]

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See detailA generalized approach for historical mock-up acquisition and data modelling: towards historically enriched 3D city models
Hervy; Billen, Roland ULg; Laroche, Florent et al

in Leduc, Thomas; Moreau, Guillaume; Billen, Roland (Eds.) Usage, Usability, and Utility of 3D City models (2012)

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See detailA Generalized Caprine-like Hypoplasia Syndrome is localized within a 6-cM interval on bovine chromosome 13 in the Montbeliarde breed.
Duchesne, A.; Manciaux, L.; Gautier, M. et al

in Animal Genetics (2008), 39(2), 112-20

Caprine-like Generalized Hypoplasia Syndrome (or SHGC) is a new hereditary disorder described in the Montbeliarde breed. We report here the characterization of this new disease, based on the visual ... [more ▼]

Caprine-like Generalized Hypoplasia Syndrome (or SHGC) is a new hereditary disorder described in the Montbeliarde breed. We report here the characterization of this new disease, based on the visual examination of animals affected by SHGC, and on physiological and biochemical studies undertaken on samples of both SHGC and normal animals. Biological samples for more than 150 affected calves and their parents have been collected over the past 4 years within the framework of the Bovine Genetic Disease Observatory. First, pedigree analyses showed that the mode of inheritance is most probably autosomal recessive. Then, a genome scan with 113 animals and 140 microsatellite markers revealed a single locus within a 35-cM region on bovine chromosome 13. Genotypes of 261 animals for 18 new microsatellite markers from the region confirmed the localization of the disorder to a 6-cM interval. Finally, based on the analysis of haplotypes in 463 Montbeliarde sires, we estimated the frequency of the SHGC mutated allele in the population and could propose a strategy for the systematic eradication of this disorder in the near future. [less ▲]

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See detailGeneralized Cloaking and Optical Polyjuice
Nicolet, A.; Zolla, F.; Geuzaine, Christophe ULg

in Proceedings of the 8th International Symposium on Electric and Magnetic Fields (EMF'2009) (2009)

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See detailGeneralized Cloaking and Optical Polyjuice
Nicolet, A.; Zolla, F.; Geuzaine, Christophe ULg

in Proceedings of the 8th conference on Electrical, Transport and Optical Properties of Inhomogeneous Media (ETOPIM 8) (2009)

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See detailGeneralized Expectation-Maximization segmentation of brain MR images
Devalkeneer, Arnaud A.; Robe, Pierre A.; Verly, Jacques ULg et al

Conference (2006)

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See detailGeneralized Fourier equations and thermoconvective instabilities
Dauby, Pierre ULg; Nelis, M.; Lebon, Georgy ULg

in Revista Mexicana De Fisica (2002), 48(Suppl. 1), 57-62

Detailed reference viewed: 12 (7 ULg)