Institution
Cergy-Pontoise University
About: Cergy-Pontoise University is a based out in . It is known for research contribution in the topics: Population & Sobolev space. The organization has 2028 authors who have published 5021 publications receiving 110856 citations. The organization is also known as: Université de Cergy-Pontoise & Universite de Cergy-Pontoise.
Topics: Population, Sobolev space, Phase transition, Bounded function, PEDOT:PSS
Papers published on a yearly basis
Papers
More filters
••
TL;DR: In this paper, it was shown that for data whose energy is smaller than that of the standing wave, and whose homogeneous Sobolev norm H^1 is smaller compared to that of a standing wave and which is radial, we have global well-posedness and scattering in dimensions 3, 4 and 5.
Abstract: We prove, for the energy critical, focusing NLS, that for data whose energy is smaller than that of the standing wave, and whose homogeneous Sobolev norm H^1 is smaller than that of the standing wave and which is radial, we have global well-posedness and scattering in dimensions 3, 4 and 5. This is sharp since if the data is in the inhomogeneous Sobolev space H^1, of energy smaller than the standing wave but of larger homogeneous H^1 norm, we have blow-up in finite time. The result follows from a general method that we introduce into this type of critical problem. By concentration-compactness we produce a critical element, which modulo the symmetries of the equation is compact, has minimal energy among those which fail to have the conclusion of our theorem. In addition, we show that the dilation parameter in the symmetry, for this solution, can be taken strictly positive.We then establish a rigidity theorem that shows that no such compact, modulo symmetries, object can exist. It is only at this step that we use the radial hypothesis.The same analysis, in a simplified form, applies also to the defocusing case, giving a new proof of results of Bourgain and Tao.
945 citations
••
TL;DR: This paper reviews the state of the art of field- programmable gate array (FPGA) design methodologies with a focus on industrial control system applications and presents three main design rules, algorithm refinement, modularity, and systematic search for the best compromise between the control performance and the architectural constraints.
Abstract: This paper reviews the state of the art of field- programmable gate array (FPGA) design methodologies with a focus on industrial control system applications. This paper starts with an overview of FPGA technology development, followed by a presentation of design methodologies, development tools and relevant CAD environments, including the use of portable hardware description languages and system level programming/design tools. They enable a holistic functional approach with the major advantage of setting up a unique modeling and evaluation environment for complete industrial electronics systems. Three main design rules are then presented. These are algorithm refinement, modularity, and systematic search for the best compromise between the control performance and the architectural constraints. An overview of contributions and limits of FPGAs is also given, followed by a short survey of FPGA-based intelligent controllers for modern industrial systems. Finally, two complete and timely case studies are presented to illustrate the benefits of an FPGA implementation when using the proposed system modeling and design methodology. These consist of the direct torque control for induction motor drives and the control of a diesel-driven synchronous stand-alone generator with the help of fuzzy logic.
882 citations
•
01 Jan 1999TL;DR: In the non-compact setting Euclidean-type Sobolev inequalities with constraints were defined in this article, where the optimal constants in the compact setting were defined by Euclideans.
Abstract: Elements of Riemannian geometry Sobolev spaces: The compact setting Sobolev spaces: The noncompact setting Best constants in the compact setting I Best constants in the compact setting II Optimal inequalities with constraints Best constants in the noncompact setting Euclidean-type Sobolev inequalities The influence of symmetries Manifolds with boundary Bibliography.
843 citations
••
TL;DR: However, despite the volume of work already done in this area, there has been little focus put on the mechanism of polypyrrole synthesis, especially concerning the most efficient method, electropolymerization as discussed by the authors.
Abstract: Over the past twenty years, polypyrrole has appeared as the
most extensively studied conducting polymer. However, despite the volume of
work already done in this area, there has been little focus put on the
mechanism of polypyrrole synthesis, especially concerning the most
efficient method, electropolymerization. Numerous analytical techniques
have been used to study polypyrrole electrodeposition and/or doping.
However, the mechanism itself is still a controversial subject as there is
not one mechanism which is universally accepted. The mechanism proposed by
Diaz is the one most commonly referred to in the literature although
several other mechanisms are not lacking in support. The controversy lies
in the initiation step as each mechanism proposes a different way of
beginning the reaction, varying between electron transfer, proton transfer
and direct radical pyrrole formation. Without considering the initiation
step, there are many other factors including electrolyte, solvent,
temperature and pH which can influence the reaction mechanism during the
electropolymerization of pyrrole, thus impacting the characteristics of the
polymer formed at the electrode.
840 citations
••
TL;DR: In this paper, the existence of silicene has been achieved recently owing to experiments involving epitaxial growth of silicon as stripes on Ag (001), ribbons on Ag(110), and sheets on Ag((111) ).
703 citations
Authors
Showing all 2028 results
Name | H-index | Papers | Citations |
---|---|---|---|
Wei Wang | 95 | 3544 | 59660 |
Sebastian Doniach | 78 | 217 | 19797 |
Laurent Jolivet | 76 | 226 | 19778 |
Lars E. Kristensen | 59 | 268 | 10408 |
Francesco Ricci | 54 | 295 | 15492 |
Muhammad Sajid | 52 | 495 | 10089 |
Dominique Vuillaume | 50 | 274 | 9790 |
Lieven De Lathauwer | 49 | 240 | 14266 |
Marc Fleurbaey | 48 | 318 | 9323 |
Mustapha Meghraoui | 48 | 142 | 5375 |
Frédéric Dumur | 48 | 305 | 7835 |
Matthieu Cord | 46 | 265 | 7387 |
Serge Palacin | 45 | 201 | 8376 |
Frank Merle | 45 | 98 | 8502 |
Andreas Honecker | 45 | 210 | 6199 |