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See detailA Meta Model to Optimal Design the VSI T2 Chart
Faraz, Alireza ULg; Heuchenne, Cédric ULg; Saniga, E.

Report (2010)

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See detailA Meta Model to Optimally Design the VSI T2 Control Chart
Faraz, Alireza ULg; Seif, A.

in international Journal of Applied Operational Research (2012), 1(3), 53-69

Recent studies have shown that the variable sampling interval (VSI) scheme helps practitioners to detect process shifts more quickly than the classical scheme (FRS). In this paper, the economically and ... [more ▼]

Recent studies have shown that the variable sampling interval (VSI) scheme helps practitioners to detect process shifts more quickly than the classical scheme (FRS). In this paper, the economically and statistically optimal design of the VSI T2 control chart for monitoring the process mean vector is investigated. The cost model proposed by Lorenzen and Vance [1] based on the Markov chain approach is modified as the objective function which is intended to be minimized through a genetic algorithm (GA) approach. Then, the effects of the costs and operating parameters on the optimal design (OD) of the chart parameters; and resulting operating loss through a fractional factorial design is systematically studied and finally, based on the ANOVA results, a Meta model to facilitate implementation in industry is proposed to determine the OD of the VSI T2 control chart parameters from the process and cost parameters. [less ▲]

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See detailMéta-analyse des études de qualite de vie internationales.
Louis, Renaud ULg

in Revue des Maladies Respiratoires (2005), 22(2 Pt 3), 446-8

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See detailLa méta-analyse des recherches expérimentales en éducation
Leclercq, Dieudonné ULg

in Revue de la Direction Générale de l’Organisation des Etudes (1986), mai

Le présent document est organisé autour d'une synthèse de divers travaux menés par J. Kulik et ses collègues du C.R.L.T. dont le LOGO oppose la progression irrégulière de l'individu (ligne brisée) à la ... [more ▼]

Le présent document est organisé autour d'une synthèse de divers travaux menés par J. Kulik et ses collègues du C.R.L.T. dont le LOGO oppose la progression irrégulière de l'individu (ligne brisée) à la courbe lisse de la progression collective (statistique) vers la maîtrise. [less ▲]

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See detailMeta-analysis identifies 29 additional ulcerative colitis risk loci, increasing the number of confirmed associations to 47.
Anderson, Carl A; Boucher, Gabrielle; Lees, Charlie W et al

in Nature Genetics (2011), 43(3), 246-52

Genome-wide association studies and candidate gene studies in ulcerative colitis have identified 18 susceptibility loci. We conducted a meta-analysis of six ulcerative colitis genome-wide association ... [more ▼]

Genome-wide association studies and candidate gene studies in ulcerative colitis have identified 18 susceptibility loci. We conducted a meta-analysis of six ulcerative colitis genome-wide association study datasets, comprising 6,687 cases and 19,718 controls, and followed up the top association signals in 9,628 cases and 12,917 controls. We identified 29 additional risk loci (P < 5 x 10(-8)), increasing the number of ulcerative colitis-associated loci to 47. After annotating associated regions using GRAIL, expression quantitative trait loci data and correlations with non-synonymous SNPs, we identified many candidate genes that provide potentially important insights into disease pathogenesis, including IL1R2, IL8RA-IL8RB, IL7R, IL12B, DAP, PRDM1, JAK2, IRF5, GNA12 and LSP1. The total number of confirmed inflammatory bowel disease risk loci is now 99, including a minimum of 28 shared association signals between Crohn's disease and ulcerative colitis. [less ▲]

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See detailMeta-Analysis in Transcriptional Network Inference
Meyer, Patrick ULg; Haibe-Kains, Benjamin; Bontempi, Gianluca

in Recomb Satellite 09 (2009)

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See detailMeta-analysis of the effects of inhaled corticosteroids on bone in asthmatic and COPD patients
Richy, Florent; Bousquet, Jean; Devogelaer, Jean-Pierre et al

in Arthritis and Rheumatism (2002, September), 46(number 9 (suppl.)), 464

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See detailMeta-Cognitive Mystery Tales
Dechêne, Antoine ULg

Conference (2014, April)

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See detailMeta-learning of Exploration/Exploitation Strategies: The Multi-Armed Bandit Case
Maes, Francis; Wehenkel, Louis ULg; Ernst, Damien ULg

in Filipe, Joaquim; Fred, Ana (Eds.) Agents and Artificial Intelligence: 4th International Conference, ICAART 2012, Vilamoura, Portugal, February 6-8, 2012. Revised Selected Papers (2013)

The exploration/exploitation (E/E) dilemma arises naturally in many subfields of Science. Multi-armed bandit problems formalize this dilemma in its canonical form. Most current research in this field ... [more ▼]

The exploration/exploitation (E/E) dilemma arises naturally in many subfields of Science. Multi-armed bandit problems formalize this dilemma in its canonical form. Most current research in this field focuses on generic solutions that can be applied to a wide range of problems. However, in practice, it is often the case that a form of prior information is available about the specific class of target problems. Prior knowledge is rarely used in current solutions due to the lack of a systematic approach to incorporate it into the E/E strategy. To address a specific class of E/E problems, we propose to proceed in three steps: (i) model prior knowledge in the form of a probability distribution over the target class of E/E problems; (ii) choose a large hypothesis space of candidate E/E strategies; and (iii), solve an optimization problem to find a candidate E/E strategy of maximal average performance over a sample of problems drawn from the prior distribution. We illustrate this meta-learning approach with two different hypothesis spaces: one where E/E strategies are numerically parameterized and another where E/E strategies are represented as small symbolic formulas. We propose appropriate optimization algorithms for both cases. Our experiments, with two-armed “Bernoulli” bandit problems and various playing budgets, show that the metalearnt E/E strategies outperform generic strategies of the literature (UCB1, UCB1-T UNED, UCB-V, KL-UCB and epsilon-GREEDY); they also evaluate the robustness of the learnt E/E strategies, by tests carried out on arms whose rewards follow a truncated Gaussian distribution. [less ▲]

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See detailLe méta-projet de restauration des tourbières de Haute-Ardenne
Dufrêne, Marc ULg; Frankard, Philippe; Plunus, Julie et al

in Hautes Fagnes (2015), 300

Ce méta-projet synthétise les 6 projets de restauration des tourbières et des milieux associés (landes sèches, landes humides, bas-marais, prairies alluviales, aulnaies rivulaires, ...) qui ont été lancés ... [more ▼]

Ce méta-projet synthétise les 6 projets de restauration des tourbières et des milieux associés (landes sèches, landes humides, bas-marais, prairies alluviales, aulnaies rivulaires, ...) qui ont été lancés depuis 2003 en Wallonie. Ces projets se répartissent sur les différents hauts-plateaux ardennais, de la Croix-Scaille aux Hautes-Fagnes, en passant par les plateaux de Libin et de Recogne, de Saint-Hubert, des Tailles et de Spa-Malchamps. Les 5 projets (presque) terminés ont déjà permis de restaurer plus de 4.500 ha de zones tourbeuses et humides sur les Hauts-Plateaux ardennais et d'assurer la protection de plus de 2.700 ha de nouveaux territoires. [less ▲]

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See detailMetabolic Acidosis during Intracranial Surgery under Propofol or Sevoflurane Anesthesia
Schaub, Isabelle; Bonhomme, Vincent; Demoitie, Jeannick et al

in Anesthesiology (2008), 109(A475), 475

Detailed reference viewed: 9 (0 ULg)