References of "2006"
     in
Bookmark and Share    
Full Text
Peer Reviewed
See detailA cascade optimization methodology for automatic parameter identification and shape/process optimization in metal forming simulation
Ponthot, Jean-Philippe ULg; Kleinermann, Jean-Pascal

in Computer Methods in Applied Mechanics & Engineering (2006), 195(41-43), 5472-5508

Computer simulations of metal forming processes using the finite element method (FEM) are, today, well established. This form of simulation uses an increasing number of sophisticated geometrical and ... [more ▼]

Computer simulations of metal forming processes using the finite element method (FEM) are, today, well established. This form of simulation uses an increasing number of sophisticated geometrical and material models, relying on a certain number of input data, which are not always readily available. The aim of inverse problems, which will be considered here, is to determine one or more of the input data relating to these forming process simulations, thereby leading to a desired result. In this paper, we will focus on two categories of such inverse problems. The first category consists of parameter identification inverse problems. These involve evaluating the material parameters for material constitutive models that would lead to the most accurate results with respect to physical experiments, i.e. minimizing the difference between experimental results and FEM simulations. The second category consists of shape/process optimization inverse problems. These involve determining the initial geometry of the specimen and/or the shape of the forming tools, as well as some parameters of the process itself, in order to provide the desired final geometry after the forming process. These two categories of inverse problems can be formulated as optimization problems in a similar way, i.e. by using identical optimization algorithms. In this paper, we intend firstly to solve these two types of optimization problems by using different non-linear gradient based optimization methods and secondly to compare their efficiency and robustness in a variety of numerical applications. (c) 2005 Elsevier B.V. All rights reserved. [less ▲]

Detailed reference viewed: 53 (2 ULg)
See detailInternal control of the magnetospheric processes at Jupiter and Saturn
Radioti, Aikaterini ULg; Krupp, N.; Woch, J. et al

Conference (2006)

Detailed reference viewed: 5 (0 ULg)
See detailLa focalisation en français, néerlandais et dans l'interlangue d'apprenants d'une langue étrangère
Hiligsmann, Philippe; Rasier, Laurent ULg

in Wlodarczyk, H.; Wlodarczyk, A. (Eds.) La focalisation dans les langues (2006)

Detailed reference viewed: 69 (6 ULg)
Full Text
See detailLes livres imprimés en langue française avant 1500 dans les Pays-Bas méridionaux : réflexions sur leur mise en page
Adam, Renaud ULg

in Van Hemelryck, Tania; Van Hoorebeeck, Céline (Eds.) L'écrit et le manuscrit à la fin du Moyen Age : actes du IIème colloque international du Groupe de recherche sur le moyen français (2006)

Detailed reference viewed: 24 (2 ULg)
Full Text
Peer Reviewed
See detailLe rôle pivot des variables latentes pourle raisonnement statistique conditionnel. Exemples d'applications environnementales des processus ponctuels marqués.
Parent, E.; Bernier, J.; Boreux, Jean-Jacques ULg

in Revue de Statistique Appliquée (2006), 54(4), 85-111

En statistique bayésienne, le raisonnement conditionnel probabiliste fonde la solidarité étroite entre modélisation et inférence. Dans le cadre de ce raisonnement, un rôle pivot est joué par les variables ... [more ▼]

En statistique bayésienne, le raisonnement conditionnel probabiliste fonde la solidarité étroite entre modélisation et inférence. Dans le cadre de ce raisonnement, un rôle pivot est joué par les variables latentes. Ce mode de raisonnement peut s’avérer utile aussi en statistique fréquentiste. On présente trois séries hydrométéorologiques décrites par des modèles de processus ponctuels marqués de complexité croissante. Sur ces exemples, on montre comment récolter les fruits de la souplesse de modélisation et des facilités de calcul apportées par les variables latentes. Ces variables améliorent la conceptualisation de variables de structure dans les modèles statistiques et permettent aux calculs d’inférence de bénéficier des algorithmes MCMC en relation avec les techniques «d’augmentation de données». [less ▲]

Detailed reference viewed: 57 (4 ULg)
Full Text
See detailDroit international privé européen
Boularbah, Hakim ULg; Nuyts, Arnaud; Watte, N.

in Journal des Tribunaux Droit Européen (2006)

Detailed reference viewed: 18 (1 ULg)
Full Text
See detailCompte rendu de l'ouvrage collectif : Medieval Virginities
Delfosse, Annick ULg

in Moyen Age (Le) (2006), 112(2), 402-403

Detailed reference viewed: 36 (5 ULg)
Full Text
See detailCompte rendu des actes du colloque : Identités franciscaines à l’âge des réformes
Delfosse, Annick ULg

in Moyen Age (Le) (2006), 112(3-4), 692-693

Detailed reference viewed: 41 (4 ULg)
Full Text
Peer Reviewed
See detailLa Paix de Fexhe, de sa rédaction à la fin de la principauté de Liège
Masson, Christophe ULg

in Bulletin de la Commission Royale des Anciennes Lois et Ordonnances de Belgique (2006), XLVII

The Peace of Fexhe has always been seen by the Liegeois as a constitutional treaty of paramount importance as it provided the principality of Liège with a representative assembly. Yet, this text, enacted ... [more ▼]

The Peace of Fexhe has always been seen by the Liegeois as a constitutional treaty of paramount importance as it provided the principality of Liège with a representative assembly. Yet, this text, enacted in 1316, remained in use until the end of the State of Liège. The present article focuses therefore on its history in order to determine the role it actually played in the political life of Liège at the end of the Middle Ages and during the Modern Times. What emerges is that, signed in a context of tension, the Peace of Fexhe really was a compromise signed between two parties exhausted by famine, not the victory of one over the other. Even though the treaty seems to record several claims of the opponents to the prince-bishop Adolphe de La Marck, it really is the latter who, in spite of what numerous historians believed, continued to direct the political game of Liège. Indeed, his arbitrators managed to counter the claims of their opponents through the insertion of clauses preventing any real upheaval within the principality. For Adolphe, this treaty is therefore a break in his quest for a total sovereignty. Following him, the prince-bishops of Liège strove in defence of their power, contravening if need be the text of 1316. The Liégeois appeared to us to have been perfectly aware of the limits of the Peace of Fexhe but they endeavoured to gloss over these in order to make the text an absolute reference in the domain of political claims and a revered rallying symbol. Then, it will be through the constant reminder of this treaty that various political claims arose, making it de facto the source of the “Liegian constitution”. Afterwards, the Liegeois had recourse to the Peace of Fexhe in order to legitimate their political options. However, it was absolutely not a general rule since several politicians close to the people, such as Thierry de Perwez or Raes de Heers did not make use of the text. On the contrary, it was within more “cultivated” circles, such as the municipal magistrates and the burgomasters, that the text was the less rarely used, whether it be at the time of the promulgation of the decisions of the Council of Trente or at the eve of the Liegian Revolution. Moreover, it is by its almost uninterrupted presence in the Liegian politics that the Peace of Fexhe asks the question of the administration of law in the principality. In spite of a common objective, punishing the abuse of power of the episcopal officers, it was in opposition over the question of the procedure with the Peaces of the XXII . Yet the Court of the XXII considered itself to be in charge of the defence of the Peace of Fexhe. Similarly, the capitulations of the prince-bishops swore to the respect of the text and court without fear of a contradiction that no one seemed to have wanted to highlight. This shows how deep it was rooted in the Liegian legal culture, even though the real action of the Peace of Fexhe through the centuries left few traces. In conclusion, the Peace of Fexhe owes its prestige to its recuperation by different political forces that used it as a battle flag, adapting it, contradicting it sometimes, to their claims. Thus, event though its exact stipulations were forgotten as soon as the end of the 16th century and it was then progressively completed, it survived in the imagination and built up its prestige on the additional meaning its utilisations provided it with, for, in Liège, who defends Fexhe defends the good right. [less ▲]

Detailed reference viewed: 575 (31 ULg)
Full Text
Peer Reviewed
See detailUn master en ligne sous la loupe
Poumay, Marianne ULg

in Distances et Savoirs (2006), 4(1),

Detailed reference viewed: 27 (10 ULg)
Full Text
See detailQualité nutritionnelle du lait - Etude de la variabilité intra- et inter-races du profil en acides gras du lait
Soyeurt, Hélène ULg; Dardenne, Pierre; Gillon, Alain ULg et al

in Le Bulletin (2006), (2), 8-10

Detailed reference viewed: 52 (8 ULg)
See detailPalaeozoic Palaeobotany
Gerrienne, Philippe ULg

Book (2006)

Special Issue of the Review of Palaeobotany and Palynology

Detailed reference viewed: 8 (0 ULg)
Full Text
See detaileCole - Projet d'apprentissage et de remédiation en ligne
Vreeswijk, Valérie ULg; Brundseaux, Marie-France ULg; Georges, François ULg et al

Report (2006)

Recherche-développement consacrée à la conception d'un dispositif en ligne susceptible de soutenir l'autonomisation des apprenants dans le déploiement des compétences "lire" et "écrire" en français.

Detailed reference viewed: 49 (5 ULg)
Full Text
Peer Reviewed
See detailDiffuse dermal angiomatosis: A previously undescribed pattern of immunoglobulin and complement deposits in two cases.
Quatresooz, Pascale ULg; Fumal, Isabelle; Willemaers, Valentine et al

in American Journal of Dermatopathology (2006), 28(2), 150-4

Two cases of diffuse dermal angiomatosis are reported in middle-aged women. This rare disease of unknown origin is characterized by increased dermal angiomatosis and ulceration. The clinical and ... [more ▼]

Two cases of diffuse dermal angiomatosis are reported in middle-aged women. This rare disease of unknown origin is characterized by increased dermal angiomatosis and ulceration. The clinical and histologic presentations of the presently reported lesions were typical for this disorder. Endothelial cells exhibited a normal immunophenotype. The perivascular basement membranes showed a distribution of collagen alpha chains typical for blood vessels, but not for lymphatics. Immunohistochemistry revealed other undescribed features. At the site of the clinical lesions, linear and granular deposits of immunoglobulins A and M, and complement were found around the vessels and at the dermal-epidermal junction. The same deposits were also found restricted to the dermal-epidermal junction in the peripheral clinically intact skin. No serological signs of auto-immune disorder were detected in one patient. A monoclonal gammopathy was disclosed in the other patient. A pattern of immunoreactant deposits similar to that disclosed in the two patients was not found in the control specimens, and has not been described so far in other types of vascular hyperplasia and neoplasia. A pathogenic role of these deposits is unsettled and should be further explored. [less ▲]

Detailed reference viewed: 52 (3 ULg)
Peer Reviewed
See detailPlis et enveloppements chez Leibniz
Bouquiaux, Laurence ULg

in Différence et identité. Les enjeux phénoménologiques du pli (2006)

Detailed reference viewed: 24 (2 ULg)
Full Text
Peer Reviewed
See detailForce feedback linearization for higher-order electromechanical sigma--delta modulators
Dong, Yufeng; Kraft, Michael ULg; Redman-White, William

in Journal of Micromechanics and Microengineering (2006), 16(6), 54-60

A higher-order electromechanical sigma–delta modulator can greatly improve the signal-to-noise ratio compared with a second-order loop that only uses the sensing element as a loop filter. However, the ... [more ▼]

A higher-order electromechanical sigma–delta modulator can greatly improve the signal-to-noise ratio compared with a second-order loop that only uses the sensing element as a loop filter. However, the electrostatic force feedback on the proof mass is inherently nonlinear, which will produce harmonics in the output spectrum and limits the total signal-to-noise and distortion ratio. High performance inertial sensors, which use sigma–delta modulators as a closed-loop control system, have strict requirements on the output signal distortion. In this paper, nonlinear effects from the force feedback and pick-off circuits are analysed and a strategy for force feedback linearization is put forward which can considerably improve the signal-to-noise and distortion ratio. A PCB prototype of a fifth-order electromechanical modulator with a bulk micromachined accelerometer was used to demonstrate the concept. [less ▲]

Detailed reference viewed: 14 (1 ULg)