Search results for " Overview"
showing 10 items of 155 documents
Théorème de Gabrielov et fonctions log-exp-algébriques
1997
Resume Nous obtenons le theoreme de Wilkie sur les fonctions log-exp-algebriques du theoreme du complementaire ≪ explicite ≫ de Gabrielov, et de notre presentation geometrique du theoreme de van den Dries, Macintyre et Marker sur les fonctions log-exp-analytiques.
Interaction Diagram of a Circular Bar in Torsion and Extension
1995
For a circular bar of perfectly plastic material and subjected to a cyclically variable torque and a constant axial force, the interaction (or generalized Bree) diagram is derived by a direct method in which Melan’s theorem is used to locate the nonratchetting load boundary.
Sur le fonctionnement du Journal de Mathématiques Pures et Appliquées entre 1917 et 1937 d'après des lettres inédites de Henri Villat à Robert de Mon…
2011
We are interested in the Journal of Mathématiques Pures and Appliquées (JMPA) over the period 1917-1937. From the end of 1921 , two mathematicians worked to its publication, Henri Villat as editor in chief and Robert Montessus Ballore as associate editor. Through unpublished letters , we descrive the operation of the JMPA after WWI.
Measurements of the Lineshape of the $Z^{0}$ and Determination of Electroweak Parameters from its Hadronic and Leptonic Decays
1994
Abstract: During the LEP running periods in 1990 and 1991 DELPHI has accumulated approximately 450000 Z0 decays into hadrons and charged leptons. The increased event statistics coupled with improved analysis techniques and improved knowledge of the LEP beam energies permit significantly better measurements of the mass and width of the Z0 resonance. Model independent fits to the cross sections and leptonic forward-backward asymmetries yield the following Z0 parameters: the mass and total width M(Z) = 91.187 +/- 0.009 GeV, GAMMA(Z) = 2.486 +/- 0.012 GeV, the hadronic and leptonic partial widths GAMMA(had) = 1.725 +/- 0.012GeV, GAMMA(l) = 83.01 +/- 0.52 MeV, the invisible width GAMMA(inv) = 51…
Two-step nilpotent Leibniz algebras
2022
In this paper we give a complete classification of two-step nilpotent Leibniz algebras in terms of Kronecker modules associated with pairs of bilinear forms. In particular, we describe the complex and the real case of the indecomposable Heisenberg Leibniz algebras as a generalization of the classical $(2n+1)-$dimensional Heisenberg Lie algebra $\mathfrak{h}_{2n+1}$. Then we use the Leibniz algebras - Lie local racks correspondence proposed by S. Covez to show that nilpotent real Leibniz algebras have always a global integration. As an application, we integrate the indecomposable nilpotent real Leibniz algebras with one-dimensional commutator ideal. We also show that every Lie quandle integr…
Design of EMI Filters Using Multi-Objective Optimization
2018
A multi-objective design procedure for EMI filters in power converters is proposed. In a first step, the results obtained by an automatic design of EMI filters for power electronic converters oriented to satisfy the electromagnetic compatibility standards and the power density constraint which impose the minimization of the filter volume and/or weight, are evaluated. In a second step, the power losses and the cost related to the EMI filter configurations are estimated. By using the dominance concept, the EMI filter designs which are part of the Pareto front are selected among a discrete set of feasible configurations. Therefore, the configurations of the Pareto front take into consideration…
"Table 4" of "Measurements of the tau polarization in Z0 decays"
1995
TAU and Z polarization values was obtained as a result of fit of the POL(cos(theta)) distribution to the formula Ptau(COS(THETA)) = (Ptau*(1+cos**2(theta))+Pz*2*cos(theta))/ ((1+cos**2(theta))+Ptau*Pz*2*cos(theta)). Results are corrected for QED effects and for the center-of-mass energies different to M(Z) with the program ZFITTER.. The first error is statistical, the second is due to the simulated data statistics and the third due to all other systematic uncertainties.
A comparison between paper and pencil and computer based assessment
2015
International audience; In this study, we describe two tools designed for comparing paper and computer assessment modalities: a " comparison table " to control migratory process from paper to computer modality and vice versa and a " grid for observation of students " to codify students' behaviours in solving process.
Quelques éléments sur la vie et l'oeuvre de Robert d'Adhémar.
2010
Nous avons rassemblé dans cette note divers éléments sur la vie et les travaux scientifiques de Robert d'Adhémar. A notre connaissance, il n'existe pas de notice sur Robert d'Adhémar. Nous donnons quelques extraits de lettres écrites par Robert d'Adhémar à son ami, le mathématicien Robert de Montessus de Ballore.
Six lettres de Giuseppe Peano à Robert de Montessus de Ballore
2012
Nous transcrivons et analysons six lettres inédites que Giuseppe Peano a adressées au mathématicien français Robert de Montessus de Ballore entre 1896 et 1902. Nous montrons comment ces lettres témoignent de l'activité mathématique des deux scientifiques.