7 research outputs found
« Dansa es us dictatz gracios ». La dansa occitane du XIIe au XIVe siècle
No full textThis paper is conceived as the first chapter of a thorough interdisciplinary investigation on the Occitan dansa, the French virelai and other related Romance lyrical genres. By combining philological and musicological approaches, we discuss the definition of the dansa-form based on medieval sources and the delimitation of its corpus, both in Occitan and Catalan milieu. Moreover, we aim to retrace the history of the troubadours’ dansa from its outset to 1400 and back to its possible origin. Concerning this particular aspect, we focus on the alleged derivation of the dansa from the popular poetry of pièces à refrain and/or of “zadjal-type” poems. An in-depth analysis of the dansa’s characteristic features and its comparison with the sacred repertoire of Latin hymns and conductus lead us to a different conclusion: the roots of the dansa-form are to be found in the courtly troubadours’ canso, through an interference with the liturgical and paraliturgical production of the responsoria
Evaluation of gain scheduled predictive control in a nonlinear MIMO model of a hydropower station
No full textThis work deals with the evaluation of the performance of a predictive control applied to a nonlinear model of Dinorwig a pumped storage hydropower plant. The controller uses a piecewise-linear plant model for prediction and is gain-scheduled according to the number of active hydro-generation Units (ranging from 1 to 6). Simulated results are presented to evaluate the performance of the predictive controller, which is compared with a gain-scheduled PI controller that has anti-windup features; this controller was tuned using the current practical values. The results show that the response, to various changes in the plant operating conditions, obtained with the predictive controller is faster and less sensitive than the one obtained from the PI controller. The results also show how reduced-order models can be used for prediction, allowing the reduction of the computing time (or the computing cost) without compromising the closed-loop performance control signal. (C) 2014 Elsevier Ltd. All rights reserved
Active Neural-PID Scheme for Non-harmonic Vibration Attenuation Strategy on SLM Structures.
No full textEvaluating Fractional PID Control in a Nonlinear MIMO Model of a Hydroelectric Power Station
No full textIn this paper a Fractional PID Control is presented. This control was designed for a hydropower plant with six generation units working in an alternation scheme. The parameters and other features of such a set of hydrogeneration units have been used to perform the respective tuning up. In order to assess the behavior of this controlled system, a model of such nonlinear plant is regulated through a classical PID by classical linearization of its set points, and then a pseudo-derivative part is substituted into a Fractional PID. Both groups of signals contain variations of voltage suggesting some abrupt changes in the supply of electricity fed to the network. Both sets of resulting signals are compared; the simulations show that the Fractional PID has a faster response with respect to those plots obtained from the classical PID used
Implication of Electric Noise in the ACORDE Front-End Electronics of the ALICE Experiment
No full textFirst look at the physics case of TLEP
No full textThe discovery by the ATLAS and CMS experiments of a new boson with mass around 125 GeV and with measured properties compatible with those of a Standard-Model Higgs boson, coupled with the absence of discoveries of phenomena beyond the Standard Model at the TeV scale, has triggered interest in ideas for future Higgs factories. A new circular e+e− collider hosted in a 80 to 100 km tunnel, TLEP, is among the most attractive solutions proposed so far. It has a clean experimental environment, produces high luminosity for top-quark, Higgs boson, W and Z studies, accommodates multiple detectors, and can reach energies up to the tt¯ threshold and beyond. It will enable measurements of the Higgs boson properties and of Electroweak Symmetry-Breaking (EWSB) parameters with unequalled precision, offering exploration of physics beyond the Standard Model in the multi-TeV range. Moreover, being the natural precursor of the VHE-LHC, a 100 TeV hadron machine in the same tunnel, it builds up a long-term vision for particle physics. Altogether, the combination of TLEP and the VHE-LHC offers, for a great cost effectiveness, the best precision and the best search reach of all options presently on the market. This paper presents a first appraisal of the salient features of the TLEP physics potential, to serve as a baseline for a more extensive design study
