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See detailFast Multi-Class Image Annotation with Random Subwindows and Multiple Output Randomized Trees
Dumont, Marie; Marée, Raphaël ULg; Wehenkel, Louis ULg et al

in Proc. International Conference on Computer Vision Theory and Applications (VISAPP) (2009, February)

This paper addresses image annotation, i.e. labelling pixels of an image with a class among a finite set of predefined classes. We propose a new method which extracts a sample of subwindows from a set of ... [more ▼]

This paper addresses image annotation, i.e. labelling pixels of an image with a class among a finite set of predefined classes. We propose a new method which extracts a sample of subwindows from a set of annotated images in order to train a subwindow annotation model by using the extremely randomized trees ensemble method appropriately extended to handle high-dimensional output spaces. The annotation of a pixel of an unseen image is done by aggregating the annotations of its subwindows containing this pixel. The proposed method is compared to a more basic approach predicting the class of a pixel from a single window centered on that pixel and to other state-of-the-art image annotation methods. In terms of accuracy, the proposed method significantly outperforms the basic method and shows good performances with respect to the state-of-the-art, while being more generic, conceptually simpler, and of higher computational efficiency than these latter. [less ▲]

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See detailFast multipole accelerated finite element-boundary element analysis of shielded induction heaters
V Sabariego, Ruth ULg; Sergeant, Peter; Gyselinck, Johan et al

in IEEE Transactions on Magnetics (2006), 42(4), 1407-1410

This paper deals with the analysis of a shielded induction heater by means of a fast multipole accelerated hybrid finite-element boundary-element model. It concerns an experimental setup with passive and ... [more ▼]

This paper deals with the analysis of a shielded induction heater by means of a fast multipole accelerated hybrid finite-element boundary-element model. It concerns an experimental setup with passive and active shielding for mitigating the stray field in the surrounding area. Numerical results of the magnetodynamic model are compared with measurements. Further, various aspects of the numerical scheme are discussed and its efficiency is evidenced. [less ▲]

Detailed reference viewed: 51 (18 ULg)
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See detailFast multipole acceleration of the hybrid finite-element/boundary-element analysis of 3-D eddy-current problems
V Sabariego, Ruth ULg; Gyselinck, J.; Dular, Patrick ULg et al

in Proceedings of the 12th COMPUMAG Conference on the Computation of Electromagnetic Fields (2003)

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See detailFast multipole acceleration of the hybrid finite-element/boundary-element analysis of 3-D eddy-current problems
V Sabariego, Ruth ULg; Gyselinck, J.; Dular, Patrick ULg et al

in IEEE Transactions on Magnetics (2004), 40(2), 1278-1281

This paper deals with the acceleration of the hybrid finite-element/boundary-element analysis of three-dimensional (3-D) eddy-current problems by means of the fast multipole method. An adaptive truncation ... [more ▼]

This paper deals with the acceleration of the hybrid finite-element/boundary-element analysis of three-dimensional (3-D) eddy-current problems by means of the fast multipole method. An adaptive truncation scheme for the multipole expansion of the 3-D Laplace Green function is proposed. As an application example, the TEAM workshop problem 28 is considered. The computational cost without and with fast multipole acceleration is discussed. [less ▲]

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See detailFast multiresponsive micellar gels from a smart ABC triblock copolymer
Willet, Nicolas ULg; Gohy, Jean-François; Lei, Liangcai et al

in Angewandte Chemie (International ed. in English) (2007), 46(42), 7988-7992

The triblock copolymer PS-b-P2VP-b-PEO undergoes simultaneous micellization and gelation, leading to high-storage-modulus materials that have fast responses to pH value, temperature, ionic strength, and ... [more ▼]

The triblock copolymer PS-b-P2VP-b-PEO undergoes simultaneous micellization and gelation, leading to high-storage-modulus materials that have fast responses to pH value, temperature, ionic strength, and shearing. The gel has a hierarchical structure with spherical core-shell-corona micelles, which, in turn, pack closely into an ordered cubic structure. [less ▲]

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See detailA Fast Newton-Raphson Method in Stochastic Linearization
Canor, Thomas ULg; Blaise, Nicolas ULg; Denoël, Vincent ULg

in Proceedings of the Ninth International Conference on Structural Dynamics (2014)

Owing to its accessible implementation and rapidity, the equivalent linearization has become a common probabilistic approach for the analysis of large-dimension nonlinear structures, as encountered in ... [more ▼]

Owing to its accessible implementation and rapidity, the equivalent linearization has become a common probabilistic approach for the analysis of large-dimension nonlinear structures, as encountered in earthquake and wind engineering. It consists in replacing the nonlinear system by an equivalent linear one, by tuning the parameters of the equivalent system, in order to minimize some discrepancy error. Consequently classical analysis tools such as the spectral analysis may be reconditioned to approximate the solution of structures with slight to moderate nonlinearities. The tuning of the equivalent parameters requires the solution of a set of nonlinear algebraic equations involving integrals. It is typically performed with the fixed-point algorithm, which is known to behave poorly in terms of convergence. We therefore advocate for the use and implementation of a Newton-Raphson approach, which behaves much better, even in its dishonest formulation. Unfortunately, this latter option requires the costly construction of a Jacobian matrix. In the approach described in this paper, this issue is answered by introducing a series expansion method that provides a fast and accurate estimation of the residual function (whose solution provides the equivalent parameters) and a fast and approximate estimation of the Jacobian matrix. An illustration demonstrate the good accuracy obtained with the proposed method. [less ▲]

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See detailFast production of highly concentrated reactive [18F] fluoride for aliphatic and aromatic nucleophilic radiolabelling
Aerts, Joël ULg; Voccia, Samuel; Lemaire, Christian ULg et al

in Tetrahedron Letters (2010), 51

The use of a polymeric solid support loaded with a long alkyl chain quaternary ammonium allows the rapid and efficient recovery of cyclotron produced [18F]F- from [18O]water to a low water content organic ... [more ▼]

The use of a polymeric solid support loaded with a long alkyl chain quaternary ammonium allows the rapid and efficient recovery of cyclotron produced [18F]F- from [18O]water to a low water content organic solution compatible with fast nucleophilic labelling of most precursors for PET radiopharmaceuticals in high yield. [less ▲]

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See detailFast Production of Highly Reactive No-Carrier-Added [18F]Fluoride for the Labeling of Radiopharmaceuticals
Lemaire, Christian ULg; Aerts, Joël ULg; Voccia, Samuel et al

in Angewandte Chemie (International ed. in English) (2010), 49

The 18F labeling of radiopharmaceuticals requires nearly anhydrous solutions of [18F]fluoride. Aqueous K2CO3 is generally used to elute [18F]fluoride from an anion-exchange resin. Replacing aqueous K2CO3 ... [more ▼]

The 18F labeling of radiopharmaceuticals requires nearly anhydrous solutions of [18F]fluoride. Aqueous K2CO3 is generally used to elute [18F]fluoride from an anion-exchange resin. Replacing aqueous K2CO3 with strong organic bases, such as the phosphazene base P2Et enabled the recovery of highly reactive [18F]fluoride and avoided the azeotropic evaporation of water, which is very difficult on a microchip device. [less ▲]

Detailed reference viewed: 128 (37 ULg)
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See detailFast quality control of short-lived radiopharmaceutical compounds with a photodiode array detector.
Plenevaux, Alain ULg; Lemaire, Christian ULg; Aerts, Joël ULg et al

in Journal of Labelled Compounds & Radiopharmaceuticals (1995), 37

Detailed reference viewed: 9 (1 ULg)
See detailThe fast regulation of aromatase activity by phosphorylations is species and tissue-independent.
Charlier, Thierry ULg; Harada, Nobuhiro; Ball, Gregory F. et al

Poster (2009)

Detailed reference viewed: 12 (1 ULg)
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See detailFast routine production of L-[11C-methyl]methionine with Al2O3/KF in a disposable unit.
Del Fiore, G.; Schmitz, F.; Plenevaux, Alain ULg et al

in Journal of Labelled Compounds & Radiopharmaceuticals (1995), 37

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See detailFast Routine Production of L-[11C-methyl]methionine with Al2O3KF
Schmitz, Frédéric; Plenevaux, Alain ULg; Del-Fiore, Guy et al

in Applied Radiation & Isotopes (1995), 46(9), 893-897

No-carrier-added (nca) L-[11C-methyl]methionine was prepared via the very fast S-alkylation of L-homocysteine adsorbed on AI203/KF with [11C]iodomethane at room temperature in ethanol. The alkylation was ... [more ▼]

No-carrier-added (nca) L-[11C-methyl]methionine was prepared via the very fast S-alkylation of L-homocysteine adsorbed on AI203/KF with [11C]iodomethane at room temperature in ethanol. The alkylation was realized with a radiochemical yield of 94 +/- 4% EOB (n = 20). More than 90% (n = 20) of the precursor L-homocysteine remained adsorbed on the solid support and was eliminated by a simple filtration. After reaction, neither racemization nor by-product were detected. The purification process was thus limited to a C18 Sep-Pak followed by an alumina Sep-Pak. The radiochemical purity measured on the final solution was shown to be > 99%. The only chemical contaminant was L-homocysteine (+ 10 µg). With this new technique, L-[11C-methyl]methionine was ready for injection within 10 min from [11C]CO2 with a specific activity ranging around 37 + 5.6 GBq (1 +/- 0.15 Ci)//tmol EOB. Through this procedure L-[11C-methyl]methionine can be prepared without preparative HPLC purification, This is an important simplification for the fast routine production of one of the most widely used radiopharmaceutical compounds for PET. [less ▲]

Detailed reference viewed: 97 (2 ULg)
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See detailFast small-disturbance analysis of long-term voltage stability
Rousseaux, Patricia ULg; Van Cutsem, Thierry ULg

in Proceedings of the 12th Power System Computation Conference (PSCC) (1996)

Detailed reference viewed: 33 (0 ULg)
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See detailFast Strength Assessment of Mitre Gates to Ship Impact
Buldgen, Loïc ULg; Le Sourne, Hervé; Rigo, Philippe ULg

in International Journal of Crashworthiness (2013)

Fast Strength Assessment of Mitre Gates to Ship Impact

Detailed reference viewed: 38 (10 ULg)
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See detailFast transient stability assessment revisited
Toumi, B.; Dhifaoui, R.; Van Cutsem, Thierry ULg et al

in IEEE Transactions on Power Systems (1986), 1

Detailed reference viewed: 8 (0 ULg)
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See detailA Fast Universal Solver for 1D Continuous and Discontinuous Steady Flows in Rivers and Pipes
Kerger, François ULg; Archambeau, Pierre ULg; Erpicum, Sébastien ULg et al

in International Journal for Numerical Methods in Fluids (2011), 66(1), 3343

Detailed reference viewed: 141 (55 ULg)