Search results for "INTERPOLATION"
showing 10 items of 331 documents
Parameters identification of the complex impedance model of the PEM fuel cell using Matlab/Simulink
2017
In this work, we present a new technical method for identifying the complex impedance model parameters of a Proton Exchange Membrane (pEM) Fuel Cell for on-board diagnosis in real time. The study of the PEM Fuel Cell modelling is important in order to understand the physical phenomena that occurring in this green renewable energy source. A diagnosis method is presented by analyzing the behavior of the complex impedance. For this, we present the identification method of the various complex impedance parameters; this identification is based on mathematical methods using the least squares method and the interpolation analysis method. The results are obtained using Matlab/Simulink tools and all…
Application of cohesive-zone models to delamination behaviour of composite material
2012
International audience; The parameters of cohesive elements have to be chosen correctly in the simulation of composite delamination by finite element method: such as interface strength, interface stiffness and shape of cohesive law. The purpose of this work is to investigate their influence on the accuracy of the results obtained. A three-dimensional cohesive-zone model has been established using Ls-dyna to simulate Double-Cantilever-Beam mode I (DCB) and Edge-Notched-Flexure mode II (ENF) tests. The influence of these parameters of cohesive element on the maximum load and the slope of load-displacement curve have been discussed by comparing experimental and numerical results. Four traction…
High-end colorimetric display characterization using an adaptive training set
2011
A new, accurate, and technology-independent display color-characterization model is introduced. It is based on polyharmonic spline interpolation and on an optimized adaptive training data set. The establishment of this model is fully automatic and requires only a few minutes, making it efficient in a practical situation. The experimental results are very good for both the forward and inverse models. Typically, the proposed model yields an average model prediction error of about 1 ∆Eab* unit or below for several displays. The maximum error is shown to be low as well. freedom given to the model considering the choice of a tar- get color space and of the kernel and smoothing factor for the int…
Characterizations of convex approximate subdifferential calculus in Banach spaces
2016
International audience; We establish subdifferential calculus rules for the sum of convex functions defined on normed spaces. This is achieved by means of a condition relying on the continuity behaviour of the inf-convolution of their corresponding conjugates, with respect to any given topology intermediate between the norm and the weak* topologies on the dual space. Such a condition turns out to also be necessary in Banach spaces. These results extend both the classical formulas by Hiriart-Urruty and Phelps and by Thibault.
Analyse du mouvement d'un objet déformable décrit par une série de nuages de points
2012
Ce rapport technique a pour but de mettre en forme nos démarches de recherche concernant le sujet de post-doctorat qui m'a été proposé, celui-ci ayant trait au suivi (tracking ) de formes en mouvement. Je mets ici en évidence, d'une part, les buts que nous souhaitons concrètement atteindre, et d'autre part, les principales contraintes techniques qui leurs sont liées. Ces contraintes ont un rapport direct avec les données que nous traitons : les nuages de points. J'exposerai une méthode développée dans le but de répondre à cette problématique, en la situant par rapport au travail existant en suivi de forme. Enfin, je proposerai un ensemble de discussions ayant trait à la poursuite de ce trav…
Development of new techniques for super-resolution video sequences : Towards a real-time implementation on Smart Camera
2020
These thesis works are part of an european project aiming to design a very hight resolution (8k) video camera. Within this project our team had the task of working on two technological aspects: (1) the design of a demonstrator carrying out a realtime deconvolution of a video stream coming from a very high resolution camera created by the consortium , (2) the design of a prototype allowing to increase the resolution and the level of detail of video streams from an input resolution of 4k to 8k using Super Resolution (SR) methods. This manuscript mainly presents the work related to the creation of the prototype realizing a Super Resolution method. In order to be able to assess the qualitative …
Interpolation by local information
2008
Les méthodes d'interpolation, qu'elles procèdent de régressions ou de krigeage, sont globales, en ce sens qu'elles utilisent l'ensemble des données disponibles sur un territoire donné. Or, quand l'hétérogénéité spatiale de celui-ci est forte, la qualité des résultats s'en ressent. Pour dépasser cette difficulté, une méthode d'interpolation locale est proposée et appliquée, à titre de test, aux températures du territoire français. Partant d'un jeu de stations de mesures réparties sur cet espace digitalisé à 250 m, la méthode consiste à modéliser les variations spatiales locales de la température en considérant chaque point de la grille et les n stations voisines les plus proches qui l'entour…
La antike Rechtsgeschichte, la Interpolationenforschung e una lettera inedita di Koschaker a Riccobono
2011
An unpublished letter contributes to delineate the relationship between Paul Koschaker and Salvatore Riccobono with particular attention to the discussion about the so-called 'antike Rechtsgeschichte'.
The 1-way on-line coupled atmospheric chemistry model system MECO(n) – Part 2: On-line coupling with the Multi-Model-Driver (MMD)
2012
A new, highly flexible model system for the seamless dynamical down-scaling of meteorological and chemical processes from the global to the meso-γ scale is presented. A global model and a cascade of an arbitrary number of limited-area model instances run concurrently in the same parallel environment, in which the coarser grained instances provide the boundary data for the finer grained instances. Thus, disk-space intensive and time consuming intermediate and pre-processing steps are entirely avoided and the time interpolation errors of common off-line nesting approaches are minimised. More specifically, the regional model COSMO of the German Weather Service (DWD) is nested on-line into the …
Gradenwitz, Riccobono und die Entwicklung der Interpolationenkritik. Methodentransfer unter europäischen Juristen im späten 19. Jahrhundert / Gradenw…
2018
Die interpolationistische Methode der Untersuchung römischer Rechtstexte, also deren Wahrnehmung als Ergebnis von nachträglichen Eingri4en, ist Gegenstand eines wiedererwachten Interesses der romanistischen Forschung. Ihre intensivste Phase erlebte die Interpolationenforschung am Ende des 19. und in den ersten Jahrzehnten des 20. Jahrhunderts. Das heutige Verstehensinteresse richtet sich insbesondere auf die Verflechtung der interpolationistischen Methode mit anderen Forschungsansätzen sowie auf ihre Entwicklung, die auf dem Gedankenaustausch zwischen Wissenschaftlern in Italien, Deutschland und anderen Ländern basiert. Im Zentrum der hier versammelten Arbeiten stehen Otto Gradenwitz, der B…