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Ara es mostren els items 9014-9033 de 245706

    • Active bending to facilitate the installation process of membranes in statically self-locking spatial structures - comparison of two case studies 

      Klasz, Walter (CIMNE, 2015-10-19)
      Comunicació de congrés
      Accés obert
      This paper presents the compressed usage of elastic material in statically self-locking configurations facilitating the assembly of hybrid structures based on the steady state balance. The full scale realized case study ...

    • Active camera calibration for robotic systems 

      Boada Farràs, Ricard (Universitat Politècnica de Catalunya, 2016)
      Projecte Final de Màster Oficial
      Accés obert
      Realitzat a/amb:   Eidgenössische Technische Hochschule Zürich
      Camera calibration is an essential process embedded in any computer vision system that involves the extraction of spatial information from captured images. Traditional techniques for calibration require an expert to take ...

    • Active control based on an estimator for the bus-pumping cancellation in the half-bridge class-d audio power amplifiers 

      Sala Caselles, Vicenç; Romeral Martínez, José Luis (2011)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      In this paper is presented a new technique to avoid the distortion generated due to mid point voltage variations on DC-Bus of Class-D Half Bridge audio amplifiers. An usual distortion source on Class-D amplifier is the ...

    • Active control implementation in cable-stayed bridges for quasi-static loading patterns 

      Crusells Girona, Miquel; Aparicio Bengoechea, Ángel Carlos (2016-07)
      Article
      Accés obert
      The following paper deals with active control implementation in cable-stayed bridges. Recent developments in structural active control of cable-stayed bridges are focused on the adaptability to dynamic effects produced by ...

    • Active control of aircraft fly-over sound transmission through an open window 

      Pàmies Gómez, Teresa; Romeu Garbí, Jordi; Genesca Francitorra, Meritxell; Arcos Villamarín, Robert (2014-04-13)
      Article
      Accés restringit per política de l'editorial
      This paper presents an experimental work on active control of sound transmission through a restricted opening bottom hinged window. The main goal of the work is to demonstrate the feasibility of the active technique to ...

    • Active control of Alfvén eigenmodes inmagnetically confined toroidal plasmas 

      Garcia Muñoz, Manuel; Shaparov, Sergei; Zeeland, Michael A, Van; Ascasibar, Enrique; Cappa, Álvaro; Chen, L; Ferreira, J; Galdon Quiroga, Joaquin; Geiger, Benedikt; González Martin, J; Heidbrink, William W.; Johnson, T; Lauber, Phillipp; Mantsinen, Mervi; Melkinov, Alexander; Nabais, F; Rivero Rodríguez, Juan Francisco; Sanchis Sanchez, Lucía; Schneider, P; Stober, Jörg; Suttrop, Wolfgang; Todo, Yasushi; Vallejos, Pablo; Zonca, Fulvio; AUG and MST1 Teams (IOP Publishing, 2019-03)
      Article
      Accés obert
      Alfvén waves are electromagnetic perturbations inherent to magnetized plasmas that can be driven unstable by a free energy associated with gradients in the energetic particles' distribution function. The energetic particles ...

    • Active control of hysteretic base-isolated structures via delayed signals 

      Acho Zuppa, Leonardo; Luo, Ningsu; Vidal Seguí, Yolanda; Pozo Montero, Francesc (2010)
      Comunicació de congrés
      Accés obert

    • Active control of noise transmitted from barriers 

      Sohrabi, Shahin (Universitat Politècnica de Catalunya, 2022-03-11)
      Tesi
      Accés obert
      Active noise cancellation is a unique approach that helps passive noise control in reducing sound levels at low frequencies; nevertheless, successful use of active noise cancellation necessitates performing numerous and ...

    • Active control of sound transmission through an aperture in a thin wall 

      Magnusson Morer, Ingrid; Pàmies Gómez, Teresa; Romeu Garbí, Jordi (2014)
      Text en actes de congrés
      Accés obert
      The reduction on sound transmission through an aperture by active means is theoretically investigated. The primary field is composed by a plane wave that arrives at a rectangular aperture placed in an infinite rigid thin ...

    • Active Control of Surface Plasmon Waveguides with a Phase Change Material 

      Rudé, Miquel; Simpson, Robert E.; Quidant, Romain; Pruneri, Valerio; Renger, Jan (2015-05-25)
      Article
      Accés obert
      The ability to manipulate light propagation at the nanoscale is of vital importance for future integrated photonic circuits. In this work we exploit the high contrast in the optical properties of the phase change material ...

    • Active control of surface plasmons in hybrid nanostructures 

      Randhawa, Sukanya (Universitat Politècnica de Catalunya, 2012-12-04)
      Tesi
      Accés obert
      Plasmonics nanostructures are becoming remarkably important as tools towards manipulating photons at the nanoscale. They are poised to revolutionize a wide range of applications ranging from integrated optical circuits, ...

    • Active control of the blade leading edge erosion for an onshore wind turbine during rainfall events 

      Ubeda Ripoll, Álvaro (Universitat Politècnica de Catalunya, 2023-07-26)
      Projecte Final de Màster Oficial
      Accés restringit per acord de confidencialitat
      Realitzat a/amb:   Universitetet i Agder

    • Active control of the surface potential of nanostructured layers 

      Domínguez Pumar, Manuel; Kowalski, Lukasz; Llobet, E.; Calavia, Raül (2016-01-21)
      Article
      Accés obert
      The objective of this letter is to show the first results obtained with a control designed to keep the average surface potential of a nanostructured layerconstant. This condition is equivalent to keeping constant the ...

    • Active control of vibrant actuators with adaptive adjustment of the reference 

      Bertran Albertí, Eduardo; Montoro López, Gabriel (Fuertes, J.M. (ed.) IEEE, 1999)
      Text en actes de congrés
      Accés obert
      An improved adaptive filter for eliminating periodic vibrations of unknown frequency in rotary machinery is presented. The proposed canceller is based on a usual bank of digital adaptive notch filters, each filter tuned ...

    • Active control of vibrations on flat plates for loudspeakers 

      Minguell Armengol, Joel (Universitat Politècnica de Catalunya / École Nationale Supérieure de Techniques Avancées, 2009)
      Projecte/Treball Final de Carrera
      Accés restringit per decisió de l'autor
      Dans la recherche de nouveaux modes de diffusion sonore, on peut être amené à utiliser des structures diverses, allant du cone utilisé dans les haut-parleurs classiques à d'autres formes plus spécifiques. Ce stage propose ...

    • Active corner reflector with circularly polarized array antennas to be used as a transponder for sentinel - 1 Satellite (C - band) 

      Ferre Tenas, Roger (Universitat Politècnica de Catalunya, 2018-10-30)
      Projecte Final de Màster Oficial
      Accés restringit per decisió de l'autor
      Realitzat a/amb:   Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
      This master thesis is about the study of an Active Corner Reflector (ACR) to be used in C-band for Sentinel-1 satellite. The purpose is to design and implement a prototype to test to extract the first outcomes and suggestion ...

    • Active current control in wind power plants during grid faults 

      Martínez Navarro, Jorge; Kjaer, P. C.; Rodríguez Cortés, Pedro; Teodorescu, Remus (2010-11)
      Article
      Accés restringit per política de l'editorial
      Modern wind power plants are required and designed to ride through faults in electrical networks, subject to fault clearing. Wind turbine fault current contribution is required from most countries with a high amount of ...

    • Active damping based on Ackermann's formula for a three-phase voltage source inverter with LCL filter 

      Guzmán Solà, Ramon; García de Vicuña Muñoz de la Nava, José Luis; Morales López, Javier; Momeneh, Arash; Miret Tomàs, Jaume; Torres Martínez, Javier (2015)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This paper presents an active damping method in natural frame for a three-phase voltage source inverter with LCL filter. The proposed method is based on the pole placement technique via Ackermann's formula. This approach ...

    • Active damping control for a three phase grid-connected inverter using sliding mode control 

      Guzmán Solà, Ramon; García de Vicuña Muñoz de la Nava, José Luis; Camacho Santiago, Antonio; Matas Alcalá, José; Castilla Fernández, Miguel; Miret Tomàs, Jaume (2013)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      This paper proposes a ne w active damping method based on virtual resistors for three-phase grid connected voltage source inverters (VSI) with LCL filter. The use of this filters is a standard solution to provide the ...

    • Active damping of a DC network with a constant power load: an adaptive observer-based design 

      Machado, Juan; Ortega, Romeo; Astolfi, Alessandro; Arocas Pérez, José; Pyrkin, Anton; Bobtsov, Alexey; Griñó Cubero, Robert (Institute of Electrical and Electronics Engineers (IEEE), 2019)
      Text en actes de congrés
      Accés obert
      This paper proposes a nonlinear, output feedback, adaptive controller to increase the stability margin of a direct-current (DC), small-scale, electrical network containing an unknown constant power load. Due to their ...