Academic literature on the topic 'Contrôle direct du couple'
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Journal articles on the topic "Contrôle direct du couple"
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Monmasson, Eric, Ahmad Ammar Naassani, and Jean-Paul Louis. "Extension du concept de contrôle direct du couple par MLI vectorielle." Revue internationale de génie électrique 4, no. 3-4 (December 30, 2001): 333–41. http://dx.doi.org/10.3166/rige.4.333-341.
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Naassani, Ahmad Ammar, Eric Monmasson, and Jean-Paul Louis. "Contrôle direct du couple et du flux rotorique d'une machine asynchrone." Revue internationale de génie électrique 8, no. 3-4 (August 30, 2005): 509–39. http://dx.doi.org/10.3166/rige.8.509-539.
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Chapuis, Y. A., D. Roye, and S. Courtine. "Commande directe du couple d'une machine asynchrone par le contrôle direct de son flux statorique." Journal de Physique III 5, no. 6 (June 1995): 863–80. http://dx.doi.org/10.1051/jp3:1995165.
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Belhadj, Jamel, Anis Sallami, and Wiem Ben Mabrouk. "Les observateurs à mode glissant pour le contrôle direct en couple d'une machine asynchrone. Intérêt et amélioration de la structure." Revue internationale de génie électrique 9, no. 2-3 (June 30, 2006): 209–33. http://dx.doi.org/10.3166/rige.9.209-233.
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Suchting, Steven, Catarina Freitas, and Anne Eichmann. "L’angiogenèse passe sous contrôle du couple Delta-Notch." médecine/sciences 23, no. 4 (April 2007): 347–48. http://dx.doi.org/10.1051/medsci/2007234347.
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Grisanti, Giulia, Davide Caprini, Giorgia Sinibaldi, Chiara Scognamiglio, Giulia Silvani, Giovanna Peruzzi, and Carlo Massimo Casciola. "A Microfluidic Platform for Cavitation-Enhanced Drug Delivery." Micromachines 12, no. 6 (June 3, 2021): 658. http://dx.doi.org/10.3390/mi12060658.
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An endothelial-lined blood vessel model is obtained in a PDMS (Polydimethylsiloxane) microfluidic system, where vascular endothelial cells are grown under physiological shear stress, allowing -like maturation. This experimental model is employed for enhanced drug delivery studies, aimed at characterising the increase in endothelial permeability upon microbubble-enhanced ultrasound-induced (USMB) cavitation. We developed a multi-step protocol to couple the optical and the acoustic set-ups, thanks to a 3D-printed insonation chamber, provided with direct optical access and a support for the US transducer. Cavitation-induced interendothelial gap opening is then analysed using a customised code that quantifies gap area and the relative statistics. We show that exposure to US in presence of microbubbles significantly increases endothelial permeability and that tissue integrity completely recovers within 45 min upon insonation. This protocol, along with the versatility of the microfluidic platform, allows to quantitatively characterise cavitation-induced events for its potential employment in clinics.
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Huet, Sylvestre. "La presse et le nucléaire, couple infernal." Reflets de la physique, no. 60 (December 2018): 41–43. http://dx.doi.org/10.1051/refdp/201860041.
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L’information des citoyens, tout comme le rôle de contrôle et de contre-pouvoir que la presse incarne, ou devrait incarner, trouve dans le nucléaire une dimension supplémentaire. En effet, la technicité de la matière oblige à un effort d’explication et de médiation scientifique pour aider les citoyens à former leur opinion. Pour autant, l’Histoire a montré que dans le domaine du nucléaire la presse a joué ce rôle avec difficulté, jusqu’à arriver à des cas avérés de désinformation.
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Le, Hien T. Ngoc, Jinsoo Park, and Sungbo Cho. "A Probeless Capacitive Biosensor for Direct Detection of Amyloid Beta 1-42 in Human Serum Based on an Interdigitated Chain-Shaped Electrode." Micromachines 11, no. 9 (August 21, 2020): 791. http://dx.doi.org/10.3390/mi11090791.
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Amyloid beta (aβ) 1-42, a peptide that is 1-42 amino acids long, is a major component of senile plaques in the brains of patients with Alzheimer’s disease. Aβ detection has become an essential antecedence to predict the declining mental abilities of patients. In this paper, a probeless capacitive biosensor for the non-Faradaic detection of aβ 1-42 peptide was developed by immobilizing a specific anti-aβ antibody onto a self-assembled monolayer functionalized interdigitated chain-shaped electrode (anti-aβ/SAM/ICE). The novelty and difference of this article from previous studies is the direct detection of aβ peptide with no redox probe ((Fe(CN)6)3−/4−), which can avoid the denaturation of the protein caused by the metallization (binding of aβ to metal ion Fe which is presented in the redox couple). The direct detection of aβ with no redox probe is performed by non-Faradaic capacitive measurement, which is greatly different from the Faradaic measurement of the charge transfer resistance of the redox probe. The detection of various aβ 1-42 peptide concentrations in human serum (HS) was performed by measuring the relative change in electrode interfacial capacitance due to the specific antibody-aβ binding. Capacitance change in the anti-aβ/SAM/ICE biosensor showed a linear detection range between 10 pg mL−1 and 104 pg mL−1, and a detection limit of 7.5 pg mL−1 in HS, which was much lower than the limit of detection for CSF aβ 1-42 (~500 pg mL−1) and other biosensors. The small dissociation constant Kd of the antibody-antigen interaction was also found to be 0.016 nM in HS, indicating the high binding affinity of the anti-aβ/SAM/ICE biosensor in the recognizing of aβ 1-42. Thus, the developed sensor can be used for label-free and direct measurement of aβ 1-42 peptide and for point-of-care diagnosis of Alzheimer’s disease without redox probe.
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Jiang, Haobin, Xijia Chen, Yifu Liu, Qian Zhao, Huanhuan Li, and Biao Chen. "Online State-of-Charge Estimation Based on the Gas–Liquid Dynamics Model for Li(NiMnCo)O2 Battery." Energies 14, no. 2 (January 8, 2021): 324. http://dx.doi.org/10.3390/en14020324.
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Accurately estimating the online state-of-charge (SOC) of the battery is one of the crucial issues of the battery management system. In this paper, the gas–liquid dynamics (GLD) battery model with direct temperature input is selected to model Li(NiMnCo)O2 battery. The extended Kalman Filter (EKF) algorithm is elaborated to couple the offline model and online model to achieve the goal of quickly eliminating initial errors in the online SOC estimation. An implementation of the hybrid pulse power characterization test is performed to identify the offline parameters and determine the open-circuit voltage vs. SOC curve. Apart from the standard cycles including Constant Current cycle, Federal Urban Driving Schedule cycle, Urban Dynamometer Driving Schedule cycle and Dynamic Stress Test cycle, a combined cycle is constructed for experimental validation. Furthermore, the study of the effect of sampling time on estimation accuracy and the robustness analysis of the initial value are carried out. The results demonstrate that the proposed method realizes the accurate estimation of SOC with a maximum mean absolute error at 0.50% in five working conditions and shows strong robustness against the sparse sampling and input error.
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Lavanchy, Anne. "Quand l’administration fait le couple par le corps." Emulations - Revue de sciences sociales, no. 32 (April 18, 2020): 63–73. http://dx.doi.org/10.14428/emulations.032.06.
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Que révèle du lien conjugal l’analyse de la gestion administrative du mariage et de ses effets légaux ? En analysant le travail des officiers d’état civil en Suisse, cet article présente trois constats. Il montre d’abord que dans le cadre du dépistage des unions dites de convenance, les couples « mixtes » font l’objet d’un contrôle accru : l’accès que permet le mariage à la naturalisation facilitée met en évidence les effets attendus, mais invisiblisés au quotidien, du lien conjugal. Dans le sillage des nouvelles études de la parenté, il permet dans un second temps de comprendre les substances qui circulent entre les conjoint·e·s – l’amour et les substances sexuelles. Enfin, faire couple ne relève pas simplement de l’ordre de la loi, mais aussi de celui de la nature : le lien conjugal révèle la nature malléable des femmes. Le corps à corps avec des époux étrangers peut changer leur appartenance nationale, qui se voit attribuer une volatilité problématique.
Dissertations / Theses on the topic "Contrôle direct du couple"
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Zolghadri, Mohammad Reza. "Controle direct du couple des actionneurs synchrones." Grenoble INPG, 1997. http://www.theses.fr/1997INPG0160.
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Le contrôle direct de couple, premièrement proposé pour les machines asynchrones, peut être utilisé pour toutes les machines à courants alternatifs. L'intérêt essentiel du contrôle direct de couple est sa structure très simple, la commande sans capteur et sa robustesse vis à vis des variations des paramètres de la machine. Dans ce travail, nous avons étudié l'application du contrôle direct de couple pour différents type de machines synchrones comme la machine à aimants permanents, la machine à réluctance variable et la machine à inducteur, tout en gardant la simplicité du système. Une méthode de contrôle de courant d'excitation, adapté au contrôle direct de couple, est proposée et ses performances ont été étudiées. Le problème de démarrage de différents types de machines synchrones à été étudié et des solutions ont été proposées. Un système expérimental basé sur une carte DSP a été utilisé pour valider les résultats de simulations
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Martins, Carlos de Almeida. "Contrôle direct du couple d'une machine asynchrone alimentée par convertisseur multiniveaux à fréquence imposée." Tese, Toulouse, INPT, 2000. http://hdl.handle.net/10216/11690.
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Martins, Carlos de Almeida. "Contrôle direct du couple d'une machine asynchrone alimentée par convertisseur multiniveaux à fréquence imposée." Doctoral thesis, Toulouse, INPT, 2000. http://hdl.handle.net/10216/11690.
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Belhadj, Jamel. "Commande directe en couple d'une machine asynchrone : structures d'observations : application aux systèmes multimachines-multiconvertisseurs." Toulouse, INPT, 2001. http://www.theses.fr/2001INPT002H.
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L'objectif de ce travail est le développement d'une structure d'observation des variables de commande du Contrôle Direct du Couple (DTC) d'une machine asynchrone. Cette structure doit résoudre un dilemne de robustesse et de temps de calcul minimal. La loi de commande obtenue sera utilisée pour la commande multimachines-multiconvertisseurs. Dans ce mémoire, l'auteur a tout d'abord étudié les nouvelles lois de commande dites à contrôle direct du flux statorique et du couple électromagnétique, en particulier le DTC et ceci en montrant les principes du réglage du flux, du couple et la définition de la logique de commutation. Ensuite il a développé trois structures d'observation : l'observateur d'état d'ordre complet, l'observateur à modes glissants et l'observateur découplé. Une étude comparative entre ces trois structures ainsi que l'estimateur classique, montre que l'observateur découplé est une structure intéressante qui répond aux contraines temporelles liées au DTC et qui résout le problème de fonctionnement à très basses vitesses. Pour l'application multimachines, l'auteur a étudié deux systèmes : le système monoondulateur-bimachines et le système biondulateur-bimachines. La commande est effectuée avec le DTC et le contrôle vectoriel. Comme pour le contrôle vectoriel, le DTC donne des résultats intéressants pour la commande des systèmes multimachines. La dernière partie de ce mémoire consiste à définir une architecture matérielle de validation en mono et multimachines. Il s'agit d'une validation pseudo-expérimentale, de la loi de commande associée à la structure d'observation développée. Ceci est effectué par une co-simulation mixte analogique/numérique.
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Chapuis, Yves André. "Controle direct du couple d'une machine asynchrone par l'orientation de son flux statorique." Grenoble INPG, 1996. http://www.theses.fr/1996INPG0006.
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De part sa robustesse, la simplicité de sa structure, son poids et sa taille, la machine asynchrone offre de nouvelles perspectives technologiques dans de nombreux domaines industriels, où l'on apprécie principalement son peu de maintenance et son faible coût. Avec les progrès de l'électronique de puissance, liés à l'apparition de composants interrupteurs rapides, et le développement des technologies numériques de commande, câblées ou programmées, il est possible à présent, de choisir une structure de commande beaucoup plus évoluée. Ainsi, la commande vectorielle à flux rotorique orienté d'une machine à induction peut maintenant mettre en évidence des principes de contrôle du couple permettant d'obtenir des performances équivalentes à celles de la machine à courant continu. Cependant cette structure nécessite, en général, la mise en place de capteurs sur l'arbre pour la connaissance d'une grandeur mécanique. De plus elle reste très sensible aux variations de paramètres de la machine, notamment celles de la résistance rotorique. Le travail réalisé dans le cadre de cette thèse propose une alternative à ces problèmes de sensibilité. En effet, on présente ici une méthode dans laquelle les grandeurs de contrôle que sont le flux statorique et le couple électromagnétique, sont calculées à partir des seules grandeurs liées au stator et ceci sans l'intervention de capteurs mécaniques. Cette nouvelle structure de commande, couramment nommée : Contrôle Direct du Couple de la machine asynchrone (Direct Torque Control DTC), a été développée plus récemment. Pour l'étude de cette structure de commande, on a choisi de commencer par mettre en place, à partir des informations présentées dans les publications, un dispositif expérimental et un logiciel de simulation. Par la suite, on a développé et complété ces deux supports d'étude, en vue des travaux spécifiques que l'on s'est fixés. Pour thèse de ces travaux, on a décidé d'analyser les comportements de la commande dans une très large plage de vitesses. Pour cela, on s'est appuyé sur les conditions de fonctionnement d'applications précises, comme celles du véhicule électrique pour laquelle on a réalisé une étude complémentaire en simulation
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Abouda, Salim. "Contribution à la commande des systèmes photovoltaiques : application aux systèmes de pompages." Thesis, Reims, 2015. http://www.theses.fr/2015REIMS005/document.
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L'objectif des travaux présentés dans cette thèse est d'apporter une contribution à l'étude d'un système photovoltaïque fonctionnant à sa puissance maximale et énergétiquement autonome. Le cas étudié, dans cette thèse, concerne la commande d'une chaine de pompage photovoltaïque dans un site isolé. Dans ce sens, et pour que le système photovoltaïque fonctionne à sa puissance maximale, il doit comporter un étage d'adaptation associé à un algorithme MPPT. Dans notre étude, nous avons utilisé deux algorithmes MPPT, l'algorithme “Perturb and Observe” (P&O) puis l'algorithme “ Increment of Conductance” (IncCond). Dans quelques applications industrielles, il est parfois nécessaire de maintenir la tension délivrée par le système photovoltaïque constante. Pour cela, un système de contrôle de cette tension est présenté. Les méthodes utilisées pour la simulation de ce système sont basées sur l'utilisation d'un régulateur PID, puis sur le contrôle par mode glissant, et enfin sur un contrôleur par logique floue. Ce système est testé pour une charge résistive puis pour le cas d'une pompe centrifuge entrainée par un moteur à courant continu à aimant permanent. Ensuite, nous avons étudié le cas d'une chaine de pompage utilisant un moteur asynchrone triphasé comme moteur d'entrainement. Dans le but d'avoir la possibilité de régler le débit d'eau, et en se basant sur la caractéristique de proportionnalité entre la vitesse et le débit, la méthode de contrôle direct du couple, Direct Torque Control - DTC est utilisée pour la commande de la vitesse du moteur asynchroneThe aim of the work presented in this thesis is to contribute to the study of a photovoltaic system operating at its maximum power and energetically autonomous. The case studied in this thesis relates to the control of a chain of photovoltaic pumping in an isolated site. In this sense and for the PV system operates at its maximum power, it must include a converter associated with a MPPT algorithm. In our study, we used two MPPT algorithms, the algorithm “Perturb and Observe” (P & O), then the algorithm “Increment of Conductance” (IncCond). In some industrial applications, it is sometimes necessary to maintain the voltage delivered by the PV system constant. For this, a control system of this voltage is presented. The methods used for the simulation of this system are based on the use of a PID controller and the sliding mode control, and finally a fuzzy logic controller. This system was tested for a resistive load then for the case of a centrifugal pump driven by a permanent magnetic DC motor. Then we studied the case of a pumping chain using a three-phase induction motor as a drive motor. In order to be able to regulate the flow of water, the Direct Torque Control method “DTC” is used to control the speed of the induction motor because it is proportional with the water flow
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El, Hassan Ismail. "Commande haute performance d'un moteur asynchrone sans capteur de vitesse par contrôle direct du couple : filtrage de Kalman étendu du vecteur d'état : contrôle de la fréquence de commutation de l'onduleur." Toulouse, INPT, 1999. http://www.theses.fr/1999INPT009H.
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Ce travail décrit la mise en oeuvre d'une commande directe du couple et du flux (DTC) sans capteur de vitesse d'un moteur asynchrone. L'alimentation est assurée par un ondulateur de tension à deux niveaux. L'absence de capteur mécanique conduit à une modélisation non linéaire du moteur. La reconstitution des grandeurs fondamentales non mesurées (flux, vitesse) est assurée par un filtre de Kalman étendu séparé en deux tâches de calcul avec des périodes d'échantillonage différentes pour faciliter l'intégration de la commande dans un contexte DTC. La maîtrise de la fréquence de commutation de l'onduleur a été aussi étudiée afin de réduire le bruit acoustique engendré par le moteur. Cette étude débouche sur la réalisation d'un prototype, avec implantation de la commande sur microprocesseurs (DSP TMS320C32). Les résultats obtenus montrent de bonnes performances statiques et dynamiques du variateur, et confirme la robustesse de la commande sur toute la plage de vitesse.
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Idjdarene, Kassa. "Contribution à l’étude et la commande de génératrices asynchrones à cage dédiées à des centrales électriques éoliennes autonomes." Thesis, Lille 1, 2010. http://www.theses.fr/2010LIL10124/document.
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Les travaux de cette thèse ont pour objectif d’étudier la machine asynchrone à cage dans le contexte d’une conversion de l’énergie éolienne dans des sites isolés. Après un bref rappel des concepts de la conversion de l’énergie éolienne en énergie électrique, ce document dresse un état de l'art des différents solutions électrotechniques utilisées tant dans le domaine de production de masse que dans celui de l’alimentation de sites isolés. Le second chapitre est dédié à la modélisation de la machine asynchrone à cage. Le modèle linéaire de la machine asynchrone présentant des limites, une modélisation originale et simple, dans laquelle le phénomène de la saturation est pris en compte par une inductance magnétisante fonction du courant magnétisant a été élaboré. Les paramètres de ce modèle peuvent être obtenus à partir d’essais ou d’une approche numérique par élément finis en 2D. Les outils de modélisation proposés sont ensuite utilisés pour l’étude des performances de la machine asynchrone dans le cas de fonctionnements en génératrice autonome débitant sur des bancs de capacités et des charges équilibrées et déséquilibrées. Les résultats de simulation sont validés expérimentalement sur un banc d’essais. La dernière partie du mémoire est consacrée à la comparaison de deux techniques de commande de la génératrice asynchrone, autonome, débitant sur un redresseur à MLI (commande vectorielle, contrôle direct du couple). Le but de ces techniques est de maintenir une tension constante à la sortie du redresseur pour des charges et des vitesses variables. Cette tension est ensuite ondulée à la bonne amplitude et fréquence pour une utilisation en site isolé. Pour chaque technique, deux stratégies ont été testées (àflux constant et à flux variable en fonction de la vitesse). Les résultats de simulation ont montrél’efficacité de ces techniques ainsi que les intérêts et les limites de chacune d’ellesThe work of this thesis aims to study the squirrel cage induction machine in the context of the wind energy conversion in isolated locations. After a brief review of the concepts of converting wind energy into electrical energy, this document describes the state of the art of different solutions used in both the mass production electrical field than in the supply of isolated sites. The secondchapter is dedicated to the modelling of squirrel cage induction machine. As the linear model presents limitations, a new and simple model, in which the saturation phenomenon is taken into account by a magnetizing inductance function of the magnetizing current, was developed. The parameters of this model can be obtained from tests or numerical approach using 2D FEM. The proposed modelling tools are then used to study the performance of stand alone induction generators connected to capacitive bank and balanced and unbalanced loads. The simulation results are validated experimentally on a test bench. The last part of the thesis is devoted to comparison of two techniques for controlling the induction generator, self-feeding a PWM rectifier (Vector Control, Direct Torque Control). The purpose of these techniques is to maintain a constant voltage at the output of the rectifier whatever the loads and speeds. This voltage is then adapted by the inverter to the good magnitude and frequency for a use in isolated areas. For each technique, two strategies were tested (at constant flux and variable flux depending on speed). The simulation results showed the effectiveness of these techniques and the interests and limitations of each
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Naassani, Ahmad Ammar. "Controle direct du couple et du flux de la machine asynchrone essai de synthese au moyen de la theorie du mode de glissement." Cachan, Ecole normale supérieure, 2001. http://www.theses.fr/2001DENS0016.
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Ce travail decrit l'analyse et la synthese, au moyen de la theorie du mode de glissement ; du controle direct du couple et du flux statorique et du controle direct du couple et du flux rotorique de la machine asynchrone. Deux vecteurs tension complets sont developpes, chaque vecteur concerne une methode de controle. La facon de generer ces vecteurs tension, se fait de deux manieres : soit par une commande directe de l'onduleur soit par une commande indirecte de l'onduleur a l'aide d'une mli vectorielle. Dans le cas d'un controle base sur une commande directe de l'onduleur, deux strategies de controle ont ete elaborees grace a l'analyse effectuee a partir des derivees des fonctions de commutation du couple et du flux. La premiere strategie est basee sur l'utilisation de quatre vecteurs tension. La deuxieme strategie de controle, denommee strategie de controle a trois vecteurs tension, permet de reduire la frequence de commutation de l'onduleur exige par les entrainements a puissance elevee. En ce qui concerne le controle direct du couple et du flux statorique (rotorique) basee sur la commande indirecte de l'onduleur, le vecteur tension complet est genere via la methode de la mli vectorielle. Dans une commande indirecte, l'onduleur peut generer n'importe quel vecteur tension tant que le vecteur tension equivalente, qui est l'image du point de fonctionnement, ne depasse pas une limite dependant de la tension d'entree de l'onduleur. Conscient que chaque algorithme de controle seul n'est pas exempt de probleme, nous avons propose l'association de deux methodes de commande de l'onduleur, la commande directe et la commande indirecte. Cette nouvelle strategie de reconfiguration permet de beneficier des avantages qu'offre chaque methode de commande de l'onduleur. C'est a dire, une bonne performance dynamique du couple due a la commande directe de l'onduleur et une diminution des oscillations du couple due a la commande indirecte de l'onduleur.
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Cimuca, Gabriel-Octavian. "Système inertiel de stockage d'énergie associé à des générateurs éoliens." Phd thesis, Paris, ENSAM, 2005. http://pastel.archives-ouvertes.fr/pastel-00001955.
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Le problème majeur associé aux sources d'énergie décentralisées est qu'elles ne participent en général pas aux services système (réglage de la tension, de la fréquence, démarrage en autonome ou black-start, possibilité de fonctionner en îlotage, etc.). Le fait de ne pas participer aux services système amène ce type de source à se comporter comme des générateurs passifs du point de vue électrique. Le réglage de la tension et de la fréquence est dès lors reporté sur les alternateurs classiques. Le taux de pénétration de la production décentralisée, c'est-à-dire la puissance qu'elle génère par rapport à la puissance consommée, doit alors être limité afin de pouvoir garantir la stabilité du réseau dans des conditions acceptables. Ceci est particulièrement vrai pour les sources à énergie renouvelable dont la source primaire est difficilement prévisible et très, comme c'est le cas de l'éolien pour lequel certains retours d'expérience indiquent que lors de taux de pénétration supérieur à 20 ou 30 % des problèmes de stabilité peuvent apparaître. Même si actuellement les éoliennes ne participent pas au réglage de la production, cela doit être changé à cause de l'augmentation continue de leurs taux de pénétration dans les réseaux électriques. En raison de la source primaire de ces systèmes de production d'énergie (le vent), qui est très aléatoire et imprévisible, une éolienne seule ne peut pas faire le réglage de la production. Donc, on a besoin d'un système de stockage jouant le rôle de tampon entre la source et le consommateur. Le système de stockage doit être assez dynamique afin qu'il soit capable d'agir en temps réel, en fonction des fluctuations de la puissance générée et consommée. Le système inertiel de stockage d'énergie (SISE) est approprié pour ce type d'application en raison de ces caractéristiques: bonne dynamique, bon rendement, durée de vie similaire à l'éolienne, écologique, etc. Donc, le premier but de ce travail a été de faire une étude approfondie sur les SISEs. L'étude a été faite du point de vue de l'association du SISE avec un générateur éolien. Le deuxième objectif de la thèse a été d'étudier et de proposer des méthodes de contrôle et supervision d'un SISE associé à un générateur éolien à vitesse variable. Le but est de contrôler le transit de puissance entre le générateur et le réseau ou la charge isolée, afin de rendre les systèmes éoliens capables à fournir des services systèmes et de fonctionner en îloté. Enfin, le troisième objectif a été de réaliser une plateforme expérimentale permettant l'implantation pratique et l'expérimentation des principes développés en théorie.
Books on the topic "Contrôle direct du couple"
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McLean, Sheila A. M. Population, Reproduction, and Family. Edited by Roger Brownsword, Eloise Scotford, and Karen Yeung. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780199680832.013.61.
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Both at national and international level, the right to reproduce and form a family has considerable personal and social implications. The policies that underpin the regulatory approach in this area need careful consideration for their supporting values and principles. While regulation of reproductive decisions may be direct or indirect, it is virtually universal. Reflection on the importance of the decision whether or not to reproduce, irrespective of the sophistication (or not) of the techniques used to effect it, demands attention to the human rights guaranteed by national laws and international agreements. This remains the case whether or not the decision concerns an individual, a couple, or a nation. Thus, both individual reproductive choices and policies on population control must be measured against human rights norms. As regulation is generally based on policy decisions, it is also important to explore how policy is made and the assumptions that underpin it.
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McKay, Matthew, and Patrick Fanning. Expressing Feelings: How to Improve Your Relationship Through Direct and Healthy Expression of Feelings (Couple Skills). New Harbinger Publications, 1994.
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Gelman, Andrew, and Deborah Nolan. Directed projects in a mathematical statistics course. Oxford University Press, 2017. http://dx.doi.org/10.1093/oso/9780198785699.003.0020.
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In this chapter we present a model for using case studies for the core of an undergraduate theoretical statistics course. These case studies have more depth than most examples found in typical mathematical statistics texts. Each case study provides a real-world question to be addressed as well as background information on the question, data to address the problem, and suggestions for investigating the problem. An important goal is to encourage and develop statistical thinking. This chapter provides both a sample case study on quality control and analysis of variance and a directed project on experimental design that includes a discussion of how we have changed the class to fit these activities into the course. In essence, the case studies become the centerpiece of the course, and as a result, the curriculum, lectures, and assignments are significantly different from a traditional mathematical statistics course.
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Bradfield, Laura, Richard Morris, and Bernard W. Balleine. OCD as a Failure to Integrate Goal-Directed and Habitual Action Control. Edited by Christopher Pittenger. Oxford University Press, 2017. http://dx.doi.org/10.1093/med/9780190228163.003.0031.
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This chapter discusses the considerable research that has identified distinct functional circuits linking frontal cortex with the basal ganglia in the control of goal-directed and habitual actions. OCD is characterized by hyperactivity in a circuit involving some of these regions. Recent accounts of the interaction of goal-directed actions and habits suggest that these control processes interact hierarchically, so one alternative to current theories is that OCD reflects a dysfunction in this interactive process resulting in dysregulated action selection, whether that selection is driven by the outcome itself or by cues predicting the outcome. Importantly, it appears that both sources of action selection depend on the OFC—outcome based retrieval on the medial OFC and cue-related retrieval on the lateral OFC. From this perspective, therefore, hyperactivity of the OFC could produce both elevated outcome retrieval and increased responsiveness to outcomes-related cues, resulting in dysregulated action selection and compulsive action initiation as a consequence.
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Vaez-Zadeh, Sadegh. Control of Permanent Magnet Synchronous Motors. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198742968.001.0001.
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This is the first comprehensive, coherent, and up-to-date book devoted solely to the control of permanent magnet synchronous (PMS) motors, as the fastest growing AC motor. It covers a deep and detailed presentation of major PMS motor modeling and control methods. The readers can find rich materials on the fundamentals of PMS motor control in addition to new motor control methods, which have mainly been developed in the last two decades, including recent advancements in the field in a systematic manner. These include extensive modeling of PMS motors and a full range of vector control and direct torque control schemes, in addition to predictive control, deadbeat control, and combined control methods. All major sensorless control and parameter estimation methods are also studied. The book covers about 10 machine models in various reference frames and 70 control and estimation schemes with sufficient analytical and implementation details including about 200 original figures. A great emphasis is placed on energy-saving control schemes. PMS motor performances under different control systems are presented by providing simulation and experimental results. The past, present, and future of the PMS motor market are also discussed. Each chapter concludes with end-chapter problems and focussed bibliographies. It is an essential source for anyone working on PMS motors in academic and industry sectors. The book can be used as a textbook with the first four chapters for a primary graduate course and the final three chapters for an advanced course. It is also a crucial reading for researchers, design engineers, and experts in the field.
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Woodroffe, Rosie, and Christl A. Donnelly. European badgers and the control of bovine tuberculosis in the United Kingdom. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198759805.003.0020.
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The European badger has become infamous because of its incompletely understood role in the spread of bovive tuberculosis to cattle, despite in actuality being directly implicated in only 5.7% of herd breakdowns. Randomised Badger culling trial data suggest that badger culling could make only a limited contribution to TB eradication in Britain. Surviving badgers in both proactive and reactive culling areas immigrate into the surrounding area, which generally worsens the rate of cattle herd breakdowns by around 25% in these areas. While badger vaccination appears promising as a potential TB control tool, there is not yet sufficient evidence to judge its effectiveness. Free shooting of badgers has proven less effective than hoped, failing to reach cull targets. Furthermore, instances of badger suffering have been reported. Consequently, controlling TB through badger management remains technically, ethically and politically challenging and alternative approaches directed at cattle are likely to be more effective.
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Spar, Debora L. National Policies and Domestic Politics. Edited by Alan M. Rugman. Oxford University Press, 2009. http://dx.doi.org/10.1093/oxfordhb/9780199234257.003.0008.
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Formally, the interaction between domestic policy and international business runs in two directions. States erect policies that affect firms' ability to trade and invest across borders; and the actions of trading and investing firms affect the political climate of the states in which they do business. The relationship, of course, is interactive and changes over time: states influence firms, and firms influence states, and both operate simultaneously in a number of domestic and international arenas. This article concentrates on just one piece of this complex arrangement. Arguing that international business is essentially, incontrovertibly political, it describes the range of state policies that can shape and constrain the behaviour of firms. Specifically, it examines five different kinds of domestic policy: trade policy, foreign direct investment, capital controls, regulation, and competition policy.
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Davies, Paul. Control Shifts via Share Acquisition Contracts with Shareholders (Takeovers). Edited by Jeffrey N. Gordon and Wolf-Georg Ringe. Oxford University Press, 2015. http://dx.doi.org/10.1093/oxfordhb/9780198743682.013.28.
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This chapter examines the regulatory issues that arise when there is an offer to acquire shares directly from one or more shareholders of a company such that control of that company shifts to the acquirer. It begins with a comparison between control shifts implemented by contract and corporate transactions which produce the same result. It identifies three principal areas where contract may need to be supplemented by takeover-specific rules arising out of the coordination costs of target shareholders, powers of target management, and agency costs of non-controlling shareholders. It then considers how takeover regulation could be fashioned so as to promote efficient and discourage inefficient transfers of control. The chapter concludes by focusing on the choices actually made in four countries: Japan, Germany, UK, and the United States.
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Anderson, Iain A., and Benjamin M. O’Brien. Muscles. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780199674923.003.0020.
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Mechanical devices that include home appliances, automobiles, and airplanes are typically driven by electric motors or combustion engines through gearboxes and other linkages. Airplane wings, for example, have hinged control surfaces such as ailerons. Now imagine a wing that has no hinged control surfaces or linkages but that instead bends or warps to assume an appropriate shape, like the wing of a bird. Such a device could be enabled using an electro-active polymer technology based on electronic artificial muscles. Artificial muscles act directly on a structure, like our leg muscles that are attached by tendon to our bones and that through phased contraction enable us to walk. Sensory feedback from our muscles enables proprioceptive control. So, for artificial muscles to be used appropriately we need to pay attention not only to mechanisms for muscle actuation but also to how we can incorporate self-sensing feedback for the control of position.
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Chudacoff, Howard P. Television and College Sports as Mass Entertainment. University of Illinois Press, 2017. http://dx.doi.org/10.5406/illinois/9780252039782.003.0004.
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This chapter discusses how television changed college sports. From the 1950s to the 1970s, the NCAA pursued deals worth millions of dollars with commercial, for-profit networks instead of with nonprofit, public radio and television, where the link between athletics and higher education might have been maintained and the commercialism of intercollegiate athletics restrained. The college sports establishment chose an economic playbook that promised direct benefit to athletics and to the institutions in which they operated. Televised football increased the visibility of a few privileged schools, but the bulk of money an institution derived from TV appearances went to support athletics. The schools themselves willingly complied with television policy so they could use television revenues and booster contributions inspired by TV exposure to pay for sports rather than to fund them from the educational budget. Thus, the commercial route was the one taken. While the NCAA may have exerted control over who played football on television, the networks found ways to use dollar appeal and flex their muscle to stretch television policy in their favor.
Book chapters on the topic "Contrôle direct du couple"
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Wang, Jin-Liang, Huai-Ning Wu, Tingwen Huang, and Shun-Yan Ren. "Pinning Control for Synchronization of CRDNNs with Directed Topologies." In Analysis and Control of Coupled Neural Networks with Reaction-Diffusion Terms, 39–61. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-4907-1_3.
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Wang, Jin-Liang, Huai-Ning Wu, Tingwen Huang, and Shun-Yan Ren. "Passivity of Directed and Undirected CRDNNs with Adaptive Coupling Weights." In Analysis and Control of Coupled Neural Networks with Reaction-Diffusion Terms, 185–209. Singapore: Springer Singapore, 2017. http://dx.doi.org/10.1007/978-981-10-4907-1_10.
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Stouvenakers, Gilles, Peter Dapprich, Sebastien Massart, and M. Haïssam Jijakli. "Plant Pathogens and Control Strategies in Aquaponics." In Aquaponics Food Production Systems, 353–78. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-15943-6_14.
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AbstractAmong the diversity of plant diseases occurring in aquaponics, soil-borne pathogens, such as Fusarium spp., Phytophthora spp. and Pythium spp., are the most problematic due to their preference for humid/aquatic environment conditions. Phytophthora spp. and Pythium spp. which belong to the Oomycetes pseudo-fungi require special attention because of their mobile form of dispersion, the so-called zoospores that can move freely and actively in liquid water. In coupled aquaponics, curative methods are still limited because of the possible toxicity of pesticides and chemical agents for fish and beneficial bacteria (e.g. nitrifying bacteria of the biofilter). Furthermore, the development of biocontrol agents for aquaponic use is still at its beginning. Consequently, ways to control the initial infection and the progression of a disease are mainly based on preventive actions and water physical treatments. However, suppressive action (suppression) could happen in aquaponic environment considering recent papers and the suppressive activity already highlighted in hydroponics. In addition, aquaponic water contains organic matter that could promote establishment and growth of heterotrophic bacteria in the system or even improve plant growth and viability directly. With regards to organic hydroponics (i.e. use of organic fertilisation and organic plant media), these bacteria could act as antagonist agents or as plant defence elicitors to protect plants from diseases. In the future, research on the disease suppressive ability of the aquaponic biotope must be increased, as well as isolation, characterisation and formulation of microbial plant pathogen antagonists. Finally, a good knowledge in the rapid identification of pathogens, combined with control methods and diseases monitoring, as recommended in integrated plant pest management, is the key to an efficient control of plant diseases in aquaponics.
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Goddek, Simon, Alyssa Joyce, Sven Wuertz, Oliver Körner, Ingo Bläser, Michael Reuter, and Karel J. Keesman. "Decoupled Aquaponics Systems." In Aquaponics Food Production Systems, 201–29. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-15943-6_8.
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AbstractTraditional aquaponics systems were arranged in a single process loop that directs nutrient-rich water from fish to the plants and back. Given the differing specific nutrient and environmental requirements of plants and fish, such systems presented a compromise to the ideal conditions for rearing of both, thus reducing the efficiency and productivity of such coupled systems. More recently, designs that allow for decoupling of units provide for a more finely tuned regulation of the process water in each of the respective units while also allowing for better recycling of nutrients from sludge. Suspended solids from the fish (e.g. faeces and uneaten feed) need to be removed from the process water before water can be directed to plants in order to prevent clogging of hydroponic systems, a step that represents a significant loss of total nutrients, most importantly phosphorus. The reuse of sludge and mobilization of nutrients contained within that sludge present a number of engineering challenges that, if addressed creatively, can dramatically increase the efficiency and sustainability of aquaponics systems. One solution is to separate, or when there are pathogens or production problems, to isolate components of the system, thus maximizing overall control and efficiency of each component, while reducing compromises between the conditions and species-specific requirements of each subsystem. Another potential innovation that is made possible by the decoupling of units involves introducing additional loops wherein bioreactors can be used to treat sludge. An additional distillation loop can ensure increased nutrient concentrations to the hydroponics unit while, at the same time, reducing adverse effects on fish health from high nutrient levels in the RAS unit. Several studies have documented the aerobic and anaerobic digestion performance of bioreactors for treating sludge, but the benefits of the digestate on plant growth are not well-researched. Both remineralization and distillation components consequently have a high unexplored potential to improve decoupled aquaponics systems.
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Snyder, Douglas K., Richard E. Heyman, Stephen N. Haynes, and Christina Balderrama-Durbin. "Couple Distress." In A Guide to Assessments That Work, edited by John Hunsley and Eric J. Mash, 489–514. Oxford University Press, 2018. http://dx.doi.org/10.1093/med-psych/9780190492243.003.0022.
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Assessment of couple distress shares basic principles of assessing individuals. However, couple assessment differs from individual assessment in that couple assessment strategies focus specifically on relationship processes and the interactions between individuals, provide an opportunity for direct observation of target complaints involving communication and other interpersonal exchanges, and must be sensitive to potential challenges unique to establishing a collaborative alliance when assessing highly distressed or antagonistic partners. This chapter focuses on the assessment of couple distress. It begins with a review of the nature of couple conflict and distress, which is followed by a review of clinical assessment instruments designed for the assessment purposes of (a) determining couple functioning, (b) case conceptualization and treatment planning, and (c) treatment monitoring and evaluation. Recommendations are included for instruments with the greatest scientific support and for assessing couple functioning in a clinically sensitive manner.
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Badler, Norman I., Cary B. Phillips, and Bonnie Lynn Webber. "Simulation with Societies of Behaviors." In Simulating Humans. Oxford University Press, 1993. http://dx.doi.org/10.1093/oso/9780195073591.003.0008.
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Recent research in autonomous robot construction and in computer graphics animation has found that a control architecture with networks of functional behaviors is far more successful for accomplishing real-world tasks than traditional methods. The high-level control and often the behaviors themselves are motivated lay the animal sciences, where the individual behaviors have the following properties: . . .• they are grounded in perception. . . . . . . • they normally participate in directing an agent’s effectors. . . . . . . • they may attempt to activate or deactivate one-auother. . . . . . . • each behavior by itself performs some task useful to the agent. . . . In both robotics and animation there is a desire to control agents in environments, though in graphics both are simulated, and in both cases the move to the animal sciences is out of discontent with traditional methods. Computer animation researchers are discontent with direct kinematic control and are increasingly willing to sacrifice complete control for realism. Robotics researchers are reacting against the traditional symbolic reasoning approaches to control such as automatic planning or expert systems. Symbolic reasoning approaches are brittle and incapable of adapting to unexpected situations (both advantageous and disastrous). The approach taken is, more or less, to tightly couple sensors and effectors and to rely on what Brooks [Bro90] calls emergent behavior, where independent behaviors interact to achieve a more complicated behavior. From autonomous robot research this approach has been proposed under a variety of names including: subsumption architecture by [Bro86], reactive planning by [GL90, Kae90], situated activity by [AC87], and others. Of particular interest to us, however, are those motivated explicitly by animal behavior: new AI by Brooks [Bro90], emergent reflexive behavior by Anderson and Donath [AD90], and computational neuro-ethology by Beer, Chiel, and Sterling [BCS90]. The motivating observation behind all of these is that even very simple animals with far less computational power than a calculator can solve real world problems in path planning, motion control, and survivalist goal attainment, whereas a mobile robot equipped with sonar sensors, laser-range finders, and a radio-Ethernet connection to a, Prolog-based hierarchical planner on a supercomputer is helpless when faced with the unexpected.
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V. Rakitin, Vladimir, and Sergey G. Rusakov. "Functional Capabilities of Coupled Memristor-Based Reactance-Less Oscillators." In Memristors [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.97808.
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New functionalities of reactance-less memristor based oscillators are discussed which arise when two elementary oscillators are connected. It is shown that the system of coupled memristor based oscillators can be used for converting analog and analog-digital signals into binary pulse sequences. The approach to control the thresholds in memristor based oscillators is discussed. Standard control approach in memristor based oscillators is the exploitation of input signal to drive the rate of change in the state of the memristor. In contrast, the main idea of the considered controlling approach is to send the input signal not directly to the memristor device but to the comparator circuit and as result to control oscillator circuit behavior by change of interval of memristor resistor variation. The capabilities of coupled memristor based oscillators with control thresholds are sufficient for constructing the simple circuit elements of oscillatory computing architectures.
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Hoy, Benjamin. "Borders of Salt and Rock." In A Line of Blood and Dirt, 119–41. Oxford University Press, 2021. http://dx.doi.org/10.1093/oso/9780197528693.003.0007.
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On the Pacific Coast, the transition from boundary survey to day-to-day control took half a century. Canadian and American dependence on Indigenous labor limited the restrictions they could implement. By the mid-1880s, the immigration of hundreds of thousands of settlers shifted the balance of power. Both governments drove the Coast Salish out of the work force and imposed a new geographic order on top of existing Indigenous ones. At the same time, Chinese immigration drove grassroots pressure to reform federal border controls. In the wake of riots, protest, and vigilante justice, the United States passed Chinese Exclusion Acts in 1882 and 1888 and Canada developed a head tax.
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Adkison, Danny M., and Lisa McNair Palmer. "Alcoholic Beverage Laws and Enforcement." In The Oklahoma State Constitution, 345–54. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780197514818.003.0037.
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This chapter looks at Article XXVIII-A of the Oklahoma constitution, which greatly loosens Oklahoma’s previously tight, conservative grip on the use and distribution of alcoholic beverages. Section 1 sets out the definition of alcohol in a self-explanatory way: “All beverages that contain alcohol, unless otherwise defined by law, shall be considered alcoholic beverages by this state and therefore governed by this Article and all other applicable laws.” Section 2 states that “the Legislature shall enact laws providing for the strict regulation, control, licensing and taxation of the manufacture, sale, distribution, possession, transportation and consumption of alcoholic beverages, consistent with the provisions of this Article.” Under the old law, Oklahoma citizens could not receive direct shipments of wine; this change in law allows the legislature to authorize direct shipments to consumers of wine. Additionally, grocery stores and other retail locations are allowed to sell wine and beer under this article, which previously was not the case. Section 3 directs the legislature to create licenses for the sale of alcoholic beverages to consumers for consumption off the premises. However, Section 5 prohibits the sale of alcoholic beverage to a person under twenty-one years of age, and to insane, mentally deficient, or intoxicated persons. Section 7 deals with the taxation of alcoholic beverages
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Grefen, Paul, Irene Vanderfeesten, and Georgios Boultadakis. "Developing a Cyber-Physical System for Hybrid Manufacturing in an Internet-of-Things Context." In Advances in Business Information Systems and Analytics, 35–63. IGI Global, 2018. http://dx.doi.org/10.4018/978-1-5225-3805-9.ch002.
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This chapter describes design and development of the HORSE system for process-oriented hybrid manufacturing that seamlessly integrates human and robotics actors in vertical manufacturing cells that are horizontally coupled in end-to-end manufacturing processes. The HORSE system supports advanced dynamic actor allocation to work cells, direct robot control and human actor instruction, closed-loop local event processing, and near-real-time global event processing. The system handles abstract process definitions and status information on the one hand and directly interfaces to industrial sensors and actuators on the other hand, making it a system with a strong cyber-physical character. The physical side of the system is deployed in an internet-of-things context, where the things are the industrial robots controlled by the HORSE system, the sensors feeding data to the system, and the products being manufactured in the industrial process managed by the system. The system will be deployed in real-world, industrial pilot scenarios in a European Horizon 2020 project.
Conference papers on the topic "Contrôle direct du couple"
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Loy, James M., Sanjay R. Mathur, and Jayathi Y. Murthy. "A Coupled Ordinates Method for Convergence Acceleration of the Phonon Boltzmann Transport Equation." In ASME 2012 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/imece2012-89352.
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Sequential solution methods are commonly-used for solving the phonon Boltzmann transport equation (BTE) because of simplicity of implementation and low storage requirements. However, they exhibit poor convergence for low Knudsen numbers. This is because sequential solution procedures couple the phonon BTEs in physical space efficiently but the coupling is inefficient in wave-vector (K) space. As the Knudsen number decreases, coupling in K space becomes dominant and convergence rates fall. Since materials like silicon have K-resolved Knudsen numbers that span 3–4 orders of magnitude at room temperature, diffuse-limit solutions are not feasible for all K vectors. Consequently, non-gray solutions of the BTE almost always experience extremely slow convergence. In this paper, we develop a coupled-ordinates method for solving the phonon BTE in the relaxation time approximation. Here, inter-equation coupling is treated implicitly through a point-coupled direct solution of the K-resolved BTEs at each control volume. This implicit solution is used as a relaxation sweep in a geometric multigrid method. The solution procedure is benchmarked against a traditional sequential solution procedure for thermal transport in silicon. Significant acceleration, between 10 to 300 times, over the sequential procedure is found for heat conduction problems.
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Byl, Katie. "A Passive Dynamic Approach for Flapping-Wing Micro-Aerial Vehicle Control." In ASME 2010 Dynamic Systems and Control Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/dscc2010-4289.
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This article outlines a new control approach for flapping-wing micro-aerial vehicles (MAVs), inspired both by biological systems and by the need for lightweight actuation and control solutions. In our approach, the aerodynamic forces required for agile motions are achieved indirectly, by modifying passive impedance properties that couple motion of the power stroke to the angle of attack (AoA) of the wing. This strategy is theoretically appealing because it can exploit an invariant, cyclical power stroke, for efficiency, and because an impedance-adjusting strategy should also require lower bandwidth, weight, and power than direct, intra-wingbeat control of AoA. We examine the theoretical range of control torques and forces that can be achieved using this method and conclude that it is a plausible method of control. Our results demonstrate the potential of a passive dynamic design and control approach in reducing mechanical complexity, weight and power consumption of an MAV while achieving the aerodynamic forces required for the types of high-fidelity maneuvers that drive current interest in autonomous, flapping-wing robotics.
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Reich, Alton J., Steve J. Doherty, and Keith A. Williams. "Load Reduction on Valve Position Indicators in High Vibration Environments." In ASME 2005 Pressure Vessels and Piping Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/pvp2005-71118.
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The Arnold Engineering Development Center (AEDC) testing complex includes more than 50 wind tunnels, test cells, arc heaters, and other specialized test facilities. Of these, 27 units have capabilities that are unmatched in the United States, and 14 are unmatched in the world. These unique facilities create equally unique operating environments for instrumentation used for monitoring and control of test conditions. Several high flow-rate, supersonic wind tunnels utilize off-the-shelf angular displacement transducers (ADTs) for monitoring the position of 90° valves (i.e. butterfly valves) used to control the air flow-rate and bulk pressure during testing. Due to the high air flow rates in supply and exhaust ducts, there are significant structural vibrations to which the ADTs are subjected. These ADTs have experienced an unacceptably high rate of failure during testing. In the event of an ADT failure, alternative flow paths may, in some cases, be utilized. If an alternative path cannot be found, however, test operations must be suspended while the faulty sensor is replaced; leading to significant cost and schedule impacts associated with the down-time. This paper discusses an effort to understand the root cause of the ADT failures based on design information, and experience in the field. Several alternative mounting conditions were considered in order to reduce the vibrational loads acting on the ADT. A number of the alternatives consisted of utilizing different shaft couplings to couple the motion of the valve stems and the ADT sensor shaft. Experiments were performed at the University of Alabama’s Applied Controls Laboratory to test the effect of the different enclosures and shaft couplings. Preliminary results indicate that the shaft coupling, in particular, have a direct impact on shaft loads transmitted to the ADT. Test results and conclusions are presented.
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Petersen, Ian R. "Time averaged consensus in a direct coupled distributed coherent quantum observer." In 2015 American Control Conference (ACC). IEEE, 2015. http://dx.doi.org/10.1109/acc.2015.7170715.
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Jandieri, Vakhtang. "On the control of radiation directivity of elementary source coupled in electromagnetic crystals." In 2008 13th International Seminar/Workshop on Direct and Inverse Problems of Electromagnetic and Acoustic Wave Theory (DIPED). IEEE, 2008. http://dx.doi.org/10.1109/diped.2008.4671819.
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Yaohua Hu and Suwu Xu. "A direct generalized predictive controller for ship course keeping." In 2007 Mediterranean Conference on Control & Automation. IEEE, 2007. http://dx.doi.org/10.1109/med.2007.4433864.
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Liu, Peng, Hui Hou, Xixiu Wu, Jinrui Tang, Guorong Zhu, Xianqiang Li, and Aihong Tang. "Reliability Evaluation of Power-Gas Coupled System with Direct Load Control." In 2019 IEEE 4th International Conference on Big Data Analytics (ICBDA). IEEE, 2019. http://dx.doi.org/10.1109/icbda.2019.8713208.
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Ko, Sung-Hun, Seong-Ryong Lee, Hooman Dehbonei, and C. V. Nayar. "A Grid-Connected Photovoltaic System with Direct Coupled Power Quality Control." In IECON 2006 - 32nd Annual Conference on IEEE Industrial Electronics. IEEE, 2006. http://dx.doi.org/10.1109/iecon.2006.347757.
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Yang, Yue-De, Zhi-Xiong Xiao, Hai-Zhong Weng, Jin-Long Xiao, and Yong-Zhen Huang. "Mode control and direct modulation for waveguide-coupled square microcavity lasers." In SPIE/COS Photonics Asia, edited by Ninghua Zhu and Werner H. Hofmann. SPIE, 2016. http://dx.doi.org/10.1117/12.2246123.
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Zhao, Chun, Milind Pandit, Guillermo Sobreviela, Arif Mustafazade, Sijun Du, Xudong Zou, and Ashwin Seshia. "A Direct Feedback Oscillator Topology Employing Weakly Coupled Resonators for Gain Control." In 2018 IEEE International Frequency Control Symposium (IFCS). IEEE, 2018. http://dx.doi.org/10.1109/fcs.2018.8597440.
Full textReports on the topic "Contrôle direct du couple"
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Perdian, David C. Direct analysis of samples by mass spectrometry: From elements to bio-molecules using laser ablation inductively couple plasma mass spectrometry and laser desorption/ionization mass spectrometry. Office of Scientific and Technical Information (OSTI), January 2009. http://dx.doi.org/10.2172/972075.
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Al-Qadi, Imad, Egemen Okte, Aravind Ramakrishnan, Qingwen Zhou, and Watheq Sayeh. Truck Platooning on Flexible Pavements in Illinois. Illinois Center for Transportation, May 2021. http://dx.doi.org/10.36501/0197-9191/21-010.
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Truck platoons have many benefits over traditional truck mobility. Truck platoons have the potential to improve safety and reduce fuel consumption between 5% and 15%, based on platoon configuration. In Illinois, trucks carry more than 50% of freight tonnage and constitute 25% of the traffic on interstates. Therefore, expected fuel savings would be significant for trucks. Deployment of truck platoons within interstate highways may have a direct effect on flexible pavement performance, as the time between consecutive axle loads (i.e., resting time) is expected to decrease significantly. Moreover, platoons could potentially accelerate pavement damage accumulation due to trucks’ channelized position, decreasing pavement service life and increasing maintenance and rehabilitation costs. The main objective of this project was to quantify the effects of truck platoons on pavements and to provide guidelines to control corresponding potential pavement damage. Finite-element models were utilized to quantify the impact of rest period on pavement damage. Recovered and accumulated strains were predicted by fitting exponential functions to the calculated strain profiles. The results suggested that strain accumulation was negligible at a truck spacing greater that 10 ft. A new methodology to control pavement damage due to truck platoons was introduced. The method optimizes trucks’ lateral positions on the pavements, and an increase in pavement service life could be achieved if all platoons follow this optimization method. Life cycle assessment and life cycle cost analysis were conducted for fully autonomous, human-driven, and mixed-traffic regimes. For example, for an analysis period of 45 years, channelized truck platoons could save life cycle costs and environmental impacts by 28% and 21% compared with human-driven trucks, respectively. Furthermore, optimum truck platoon configuration could reduce life cycle costs and environmental impacts by 48% and 36%, respectively, compared with human-driven trucks. In contrast, channelized traffic could increase pavement roughness, increasing fuel consumption by 15%, even though platooning vehicles still benefit from reduction in air drag forces. Given that truck platoons are expected to be connected only in the first phase, no actions are required by the agency. However, in the second phase when truck platoons are also expected to be autonomous, a protocol for driving trends should be established per the recommendation of this study.
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Roschelle, Jeremy, Britte Haugan Cheng, Nicola Hodkowski, Julie Neisler, and Lina Haldar. Evaluation of an Online Tutoring Program in Elementary Mathematics. Digital Promise, April 2020. http://dx.doi.org/10.51388/20.500.12265/94.
Full textAbstract:
Many students struggle with mathematics in late elementary school, particularly on the topic of fractions. In a best evidence syntheses of research on increasing achievement in elementary school mathematics, Pelligrini et al. (2018) highlighted tutoring as a way to help students. Online tutoring is attractive because costs may be lower and logistics easier than with face-to-face tutoring. Cignition developed an approach that combines online 1:1 tutoring with a fractions game, called FogStone Isle. The game provides students with additional learning opportunities and provides tutors with information that they can use to plan tutoring sessions. A randomized controlled trial investigated the research question: Do students who participate in online tutoring and a related mathematical game learn more about fractions than students who only have access to the game? Participants were 144 students from four schools, all serving low-income students with low prior mathematics achievement. In the Treatment condition, students received 20-25 minute tutoring sessions twice per week for an average of 18 sessions and also played the FogStone Isle game. In the Control condition, students had access to the game, but did not play it often. Control students did not receive tutoring. Students were randomly assigned to condition after being matched on pre-test scores. The same diagnostic assessment was used as a pre-test and as a post-test. The planned analysis looked for differences in gain scores ( post-test minus pre-test scores) between conditions. We conducted a t-test on the aggregate gain scores, comparing conditions; the results were statistically significant (t = 4.0545, df = 132.66, p-value < .001). To determine an effect size, we treated each site as a study in a meta-analysis. Using gain scores, the effect size was g=+.66. A more sophisticated treatment of the pooled standard deviation resulted in a corrected effect size of g=.46 with a 95% confidence interval of [+.23,+.70]. Students who received online tutoring and played the related Fog Stone Isle game learned more; our research found the approach to be efficacious. The Pelligrini et al. (2018) meta-analysis of elementary math tutoring programs found g = .26 and was based largely on face-to-face tutoring studies. Thus, this study compares favorably to prior research on face-to-face mathematics tutoring with elementary students. Limitations are discussed; in particular, this is an initial study of an intervention under development. Effects could increase or decrease as development continues and the program scales. Although this study was planned long before the current pandemic, results are particularly timely now that many students are at home under shelter-in-place orders due to COVID-19. The approach taken here is feasible for students at home, with tutors supporting them from a distance. It is also feasible in many other situations where equity could be addressed directly by supporting students via online tutors.