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Book Description
La machine asynchrone est la plus répandue dans l'industrie. Sa modélisation classique ne prend pas en compte les courants de Foucault dans les barres rotoriques qui induisent pourtant de fortes variations tant de l'inductance que de la résistance du rotor. Ce phénomène diffusif, appelé " effet de peau " est donc modélisable de façon compacte en faisant appel à la dérivée fractionnaire (ordre non entier). Le mémoire analyse théoriquement le phénomène électromagnétique sur une barre rotorique isolée avant d'aborder le rotor dans son ensemble. Cette analyse est confirmée par les résultats issus des calculs numériques du champ magnétique, exploités pour identifier un modèle d'ordre non entier de la machine (méthode d'identification de Levenberg Marcquardt). Puis, le modèle est confronté à une identification à partir de résultats expérimentaux. Enfin, une méthode automatique de passage à un modèle dynamique approché d'ordre entier sur une gamme de fréquence est présentée.
Author: Jean-Claude Trigeassou Publisher: John Wiley & Sons ISBN: 1786304554 Category : Technology & Engineering Languages : en Pages : 426
Book Description
This book introduces an original fractional calculus methodology (the infinite state approach) which is applied to the modeling of fractional order differential equations (FDEs) and systems (FDSs). Its modeling is based on the frequency distributed fractional integrator, while the resulting model corresponds to an integer order and infinite dimension state space representation. This original modeling allows the theoretical concepts of integer order systems to be generalized to fractional systems, with a particular emphasis on a convolution formulation. With this approach, fundamental issues such as system state interpretation and system initialization – long considered to be major theoretical pitfalls – have been solved easily. Although originally introduced for numerical simulation and identification of FDEs, this approach also provides original solutions to many problems such as the initial conditions of fractional derivatives, the uniqueness of FDS transients, formulation of analytical transients, fractional differentiation of functions, state observation and control, definition of fractional energy, and Lyapunov stability analysis of linear and nonlinear fractional order systems. This second volume focuses on the initialization, observation and control of the distributed state, followed by stability analysis of fractional differential systems.
Author: Jean-Claude Trigeassou Publisher: John Wiley & Sons ISBN: 111964884X Category : Technology & Engineering Languages : en Pages : 321
Book Description
This book introduces an original fractional calculus methodology (‘the infinite state approach’) which is applied to the modeling of fractional order differential equations (FDEs) and systems (FDSs). Its modeling is based on the frequency distributed fractional integrator, while the resulting model corresponds to an integer order and infinite dimension state space representation. This original modeling allows the theoretical concepts of integer order systems to be generalized to fractional systems, with a particular emphasis on a convolution formulation.
Author: Lotfi Beji Publisher: American Institute of Physics ISBN: Category : Computers Languages : en Pages : 416
Book Description
The aim of CISA’09 is to present the latest research and application results emerging from new research and technological developments of complex systems and intelligent machines acting on known or unknown, virtual or real, environments in an autonomous way or in cooperation with humans. This field requires skills in automation and control, perception of the environment, human-computer interfaces, mechanics and design, simulation, etc. It also aims at encouraging scientific cooperation between North and South and promoting scientific exchanges through a durable event.
Author: Ahmed Belasri Publisher: Springer Nature ISBN: 9811554447 Category : Technology & Engineering Languages : en Pages : 659
Book Description
This book highlights peer reviewed articles from the 1st International Conference on Renewable Energy and Energy Conversion, ICREEC 2019, held at Oran in Algeria. It presents recent advances, brings together researchers and professionals in the area and presents a platform to exchange ideas and establish opportunities for a sustainable future. Topics covered in this proceedings, but not limited to, are photovoltaic systems, bioenergy, laser and plasma technology, fluid and flow for energy, software for energy and impact of energy on the environment.
Book Description
La machine asynchrone est la plus répandue dans l'industrie. Sa modélisation classique ne prend pas en compte les courants de Foucault dans les barres rotoriques qui induisent pourtant de fortes variations tant de l'inductance que de la résistance du rotor. Ce phénomène diffusif, appelé " effet de peau " est donc modélisable de façon compacte en faisant appel à la dérivée fractionnaire (ordre non entier). Le mémoire analyse théoriquement le phénomène électromagnétique sur une barre rotorique isolée avant d'aborder le rotor dans son ensemble. Cette analyse est confirmée par les résultats issus des calculs numériques du champ magnétique, exploités pour identifier un modèle d'ordre non entier de la machine (méthode d'identification de Levenberg Marcquardt). Puis, le modèle est confronté à une identification à partir de résultats expérimentaux. Enfin, une méthode automatique de passage à un modèle dynamique approché d'ordre entier sur une gamme de fréquence est présentée.
Author: International Livestock Research Institute Publisher: ILRI (aka ILCA and ILRAD) ISBN: 9789291460038 Category : Animal industry Languages : en Pages : 268
Book Description
Policy concepts; Identification of policy issues; Production systems, supply and demand; Market, price and trade policies; Marketing and distribution systems; Budget and manpower planning; Land tenure police for the livestock sector; Policy analysis report writing and communication; Livestock production and marketing in alphabeta - a case study.
Author: Alain Berthoz Publisher: Odile Jacob ISBN: 2738147453 Category : Science Languages : en Pages : 187
Book Description
“Simplexity, as I understand it, is the range of solutions living organisms have found, despite the complexity of natural processes, to enable the brain to prepare an action and plan for the consequences of it. These solutions are simplifying principles that enable the processing of information or situations, by taking into account past experience and anticipating the future. They are neither caricatures, shortcuts, or summaries. They are new ways of asking questions, sometimes at the cost of occasional detours, in order to achieve faster, more elegant, more effective actions.” A. B. As Alain Berthoz demonstrates in this profoundly original book, simplicity is never easy; it requires suppressing, selecting, connecting, thinking, in order to then act in the best way possible. And what if we, in turn, are inspired by the living world to process the complexity that surrounds us? Alain Berthoz is professor at the Collège de France where he is co-director of the Laboratoire de physiologie de la perception et de l’action. [Laboratory for the physiology of perception and action]. He is a member of the French Academy of Sciences, and is the author of Le Sens du mouvement [The Brain's Sense of Movement] and La Décision [Emotion and Reason].
Author: Georgeta Raţă Publisher: Cambridge Scholars Publishing ISBN: 1443839612 Category : Foreign Language Study Languages : en Pages : 385
Book Description
Agricultural English is a collection of essays on the English of Agriculture. The approach is a linguistic one: the different aspects of the English used in the field of agriculture (agricultural practices, agricultural systems) and in some fields related to agriculture (agricultural zoology, agri-tourism, biology, botany, ecology, entomology, gastronomy, land measurement, plant pathology, zoology) are analysed from a morphological (combination, derivation), syntactical (nominal phrases, verbal phrases), lexical and lexicographical, semantic (homonymy, semantic fields, synonymy, terminology), pragmatic (academic discourse, idiom, metaphor), etymological (etymon, Latin heritage), and contrastive (English–Croatian, English–French, English–German, English–Romanian, Romanian–English) points of view. The book will appeal to agriculturists, animal breeders, professors, researchers, students, and translators from Croatian-, English-, French-, German-, and Romanian-speaking countries, active in their own countries or abroad. The types of academic readership it would appeal to include academic teaching staff, researchers and students in the fields of agriculture and related fields – agricultural zoology, agri-tourism, biology, botany, ecology, entomology, gastronomy, land measurement, plant pathology, and zoology.
Author: Alain Berthoz Publisher: Harvard University Press ISBN: 9780674009806 Category : Medical Languages : en Pages : 356
Book Description
This interpretation of perception and action allows Alain Berthoz to focus on psychological phenomena: proprioception and kinaesthesis; the mechanisms that maintain balance and co-ordination actions; and basic perceptual and memory processes involved in navigation.
Author: Sylvain Canat
Author: Jean-Claude Trigeassou
Author: Jean-Claude Trigeassou
Author: Lotfi Beji
Author: Ahmed Belasri
Author: Sylvain Canat
Author: International Livestock Research Institute
Author: Alain Berthoz
Author: Georgeta Raţă
Author: Alain Berthoz
Author: Vladimir Petrovich Demikhov