Now showing items 1959-1978 of 72473

  • A new high-efficiency single-phase transformerless PV inverter topology 

    Kerekes, Tamas; Teodorescu, Remus; Rodríguez Cortés, Pedro; Vázquez Guzmán, Gerardo; Aldabas Rubira, Emiliano (IEEE Press. Institute of Electrical and Electronics Engineers, 2011-01)
    Article
    Open Access
    There is a strong trend in the photovoltaic inverter technology to use transformerless topologies in order to acquire higher efficiencies combining with very low ground leakage current. In this paper, a new topology, ...
  • A new high-pressure triaxial apparatus for inducing and tracking hydro-mechanical degradation of clayey rocks 

    Pineda Jiménez, Jubert Andrés; Romero Morales, Enrique Edgar; Alonso Pérez de Agreda, Eduardo; Pérez Revilla, Tomás (2014-11)
    Article
    Restricted access - publisher's policy
    This paper presents the development of a new high-pressure triaxial apparatus specifically prepared for inducing and tracking the degradation of clayey rocks. Total suction—used to induce the hydraulic degradation—is applied ...
  • A new hybrid GA-PSO method for solving multi-period inventory routing problem with considering financial decisions 

    Rabbani, Masoud; Baghersad, Milad; Jafari, Ruholla (School of Industrial and Aeronautic Engineering of Terrassa (ETSEIAT). Universitat Politècnica de Catalunya (UPC), 2013-12)
    Article
    Open Access
    Integration of various logistical components in supply chain management, such as transportation, inventory control and facility location are becoming common practice to avoid sub-optimization in nowadays’ competitive ...
  • A new integral management model and evaluation method to enhance sustainability of renewable energy projects for energy and sanitation services 

    Lillo, Pau; Ferrer Martí, Laia; Fernández-Baldor, Álvaro; Ramírez, Benito (2015)
    Article
    Restricted access - publisher's policy
    Autonomous systems based on the use of renewable energy (RE) have proven suitable for providing energy and sanitation services to isolated communities. However, most of these projects fail due to managerial weaknesses. ...
  • A new kind of type I supernovae? 

    Isern Vilaboy, Jordi; Bravo Guil, Eduardo; Domínguez, Inmaculada (Istituto Nazionale di Astrofisica, 2000-12)
    Article
    Open Access
    In this paper we examine the consequences of the propagation of a slow deflagration front through a C-0 white dwarf that leads to the formation of a marginally bound remnant. This situation corresponds to the transition ...
  • A new laboratory radio frequency identification (RFID) system for behavioural tracking of marine organisms 

    Sardà Amills, Francesc; Aguzzi, Jacopo; Sbragaglia, Valerio; Sarriá Gandul, David; García, José Antonio; Costa, Corrado; Río Fernandez, Joaquín del; Manuel Lázaro, Antonio; Menesatti, Paolo (2011-10-11)
    Article
    Open Access
    Radio frequency identification (RFID) devices are currently used to quantify several traits of animal behaviour with potential applications for the study of marine organisms. To date, behavioural studies with marine ...
  • A new language is born 

    Mcgloin, Patrick (Centre de Política de Sòl i Valoracions, 2004-09)
    Conference report
    Open Access
  • A New learning experience: voluntary preparatory course for the bachelor’s degree in engineering 

    Botey, Muriel; Alcaraz, Olga (Universitat Politècnica de Catalunya. Institut de Ciències de l'Educació, 2012-03)
    Article
    Open Access
    This paper reports on a new experience carried out at school associated with the Technical University of Catalonia, Universitat Politècnica de Catalunya (UPC) in September 2010. The aim is to describe the organization, ...
  • A new least-squares approximation of affine mappings for sweep algorithms 

    Roca Navarro, Francisco Javier; Sarrate Ramos, Josep; Huerta, Antonio (2010-06)
    Article
    Open Access
    This paper presents a new algorithm to generate hexahedral meshes in extrusion geometries. Several algorithms have been devised to generate hexahedral meshes by projecting the cap surfaces along a sweep path. In all of ...
  • A new lossless orthogonal simplification method for 3D objects based on bounding structures 

    Cruz Matías, Irving Alberto; Ayala Vallespí, M. Dolors (2014-07)
    Article
    Restricted access - publisher's policy
    This paper presents a new approach to simplify 3D binary images and general orthogonal pseudo-polyhedra (OPP). The method is incremental and produces a level-of-detail sequence of OPP, where any object of this sequence ...
  • A new MAC approach in wireless body sensor networks for health care 

    Otal Ruiz, Begoña; Alonso Zárate, Luis Gonzaga; Verikoukis, Christos (INTECH, 2011-02)
    Part of book or chapter of book
    Open Access
  • A new medium access protocol based on distributed queues for a CDMA environment 

    Alonso Zárate, Luis Gonzaga; Agustí Comes, Ramon; Sallent Roig, José Oriol (Institute of Electrical and Electronics Engineers (IEEE), 1999)
    Conference report
    Restricted access - publisher's policy
    This paper presents and analyses a new stable near-optimum random access protocol. The proposed access scheme is adapted for being used in a CDMA environment. It is based on distributed queues and a collision resolution ...
  • A new method for sea wave detection by using a speed log meter 

    Recolons Martos, Jaume; Torrents Dolz, Josep M. (2011)
    Conference report
    Restricted access - publisher's policy
    We present two different methods for measuring waves from the information provided by the speed log meter onboard. The first method processes data in the time domain, and is based in the measurement of the standard deviation ...
  • A new method for the acquisition of arterial pulse wave using self-mixing interferometry 

    Arasanz Tena, Andrés; Azcona Guerrero, Francisco Javier; Royo Royo, Santiago; Jha, Ajit; Pladellorens Mallofré, Josep (2014-11-01)
    Article
    Open Access
    In this paper we present a technique based on self-mixing interferometry as a method for the acquisition and reconstruction of the arterial pulse wave. A modification of the classic fringe counting reconstruction algorithm ...
  • A new method to improve the total efficiency of parallel converters 

    Hoff Dupont, Fabrício; Zaragoza Bertomeu, Jordi; Rech, Cassiano; Pinheiro, José Renes (2013)
    Conference report
    Open Access
    This paper proposes a new methodology for efficiency optimization in systems composed by parallel converters. The proposed methodology takes into account the individual efficiency curves and determines the optimum ...
  • A new method to obtain information about the pore size distribution in microporous polymeric membranes 

    Llorens, Joan; Marco, P.; Sabaté Reboll, José; Pujolà Cunill, Montserrat; Felip, I; Plumed, E (2008-03)
    Article
    Restricted access - publisher's policy
    Transport measurements of selected fluids through porous membranes provide information on precise statistical moments of the membrane pore-size distribution (PSD). It is assumed that membrane porosity, ~T,is distributed ...
  • A new methodology to identify supply chains sustainability bottlenecks 

    Pereda Pons, Eduardo (Universitat Politècnica de CatalunyaInstituto Superior Técnico, 2015)
    Bachelor thesis
    Open Access
    The world globalization has been creating a very strong competition amongst companies. To maintain their market position, companies need to guarantee that all their activities are performed with high efficacy and efficiency ...
  • A new methodology to identify supply chains sustainability bottlenecks 

    Pereda Pons, Eduardo (Universitat Politècnica de CatalunyaInstituto Superior Técnico, 2015)
    Bachelor thesis
    Open Access
    The world globalization has been creating a very strong competition amongst companies. To maintain their market position, companies need to guarantee that all their activities are performed with high efficacy and efficiency ...
  • A new model for supply chain network design with integrated assembly line balancing decisions 

    Pereira Gude, Jordi; Vilà Bonilla, Mariona (Taylor & Francis, 2015-11-26)
    Article
    Open Access
    Supply chain network design aims at the integration of the different actors of a supply chain within a single framework in order to optimise the total profit of the system. In this paper, we consider the integration of ...
  • A new modelling approach for unsaturated soils using independent stress variables 

    Sheng, Daichao; Fredlund, Delwyn G.; Gens Solé, Antonio (2008-04)
    Article
    Restricted access - publisher's policy
    Although a number of constitutive models for unsaturated soils exist in the literature, some fundamental questions have not been fully answered. There are questions related to (i) the change of the yield stress with soil ...