Browsing by Author "Pérez Vidal, Lluís"
Now showing items 1-20 of 24
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3D simulation of tool machining
Puig Puig, Anna; Pérez Vidal, Lluís; Tost Pardell, Daniela (2001-12)
Research report
Open AccessThis paper describes a three-dimensional tool machining simulation system. The initial tool and the grinding wheels are integrated with the machine-tool. The application reads and interprets the CNC program code that ... -
An Adaptive algorithm to compute the medial axis transform of 2-D polygonal domains
Joan Arinyo, Robert; Pérez Vidal, Lluís; Gargallo Monllau, Elies (1995-10)
Research report
Open AccessAn adaptive algorithm to compute the medial axis transform of 2D polygonal domains with arbitrary genus is presented. The algorithm is based on the refinement of a coarse medial axis transform by subdividing the domain ... -
Boolean operations for 3D simulation of CNC machining
Tost Pardell, Daniela; Puig Puig, Anna; Pérez Vidal, Lluís (2002-07-04)
Research report
Open AccessThis paper addresses the simulation of drilling tools CNC machining. It describes a novel approach for the computation of the boundary representation of the machined tools. Machining consists of a sequence of boolean ... -
CN : a computer-aided between contour drawing package
Pérez Vidal, Lluís (1990-09-19)
Research report
Open AccessThis report describes the design and implementation process of a graphics package built to visiualize surfaces by means of contour lines. This process involves three steps: triangulation, interpolation and visualization. ... -
Computer (PC) assisted drawing of diagrams for forecasting soaring weather
Pérez Vidal, Lluís (1995-01-01)
Research report
Open AccessTo produce a weather forecast for soaring flight, meteorologists use, together with other data, a vertical sounding, involving (dry) temperature and wet-bulb temperature at several heights. This sampling results in a ... -
Computing the medial axis transform of polygonal domains by tracing paths
Joan Arinyo, Robert; Pérez Vidal, Lluís; Vilaplana Pastó, Josep (1999-04)
Research report
Open AccessA practical algorithm for computing the medial axis transform of 2D polygonal domains is presented. The algorithm computes the medial axis by tracing its paths. The medial axis is generated in the form of a graph where ... -
Dibuix de patrons per a la talla de panys de vela assistit per computador
Pérez Vidal, Lluís; Robert Buti, José María (Universitat Politècnica de Barcelona. Centre de Càlcul, 1986-09)
Article
Open AccessEls panys de veles de vaixell es tallen actualment de forma acusadament empírica. En aquest article presentem una primera aproximació al dibuix per a la talla de patrons amb ajuda de computador. Per aproximar les seccions ... -
Fe d'errades
Pérez Vidal, Lluís; Robert, Josep M. (Universitat Politècnica de Barcelona. Centre de Càlcul, 1986-12)
Review
Open AccessAl volum 10 nº. 3 hi mancaven les figures corresponents a l'article: "DIBUIX DE PATRONS PER A LA TALLA DE PANYS DE VELA ASSISTIT PER COMPUTADOR" -
Generació adaptativa de contorns de nivell
Pérez Vidal, Lluís; Brunet Crosa, Pere (Universitat Politècnica de Barcelona. Centre de Càlcul, 1987)
Article
Open AccessThe production of drawings with surface contours starts from a set of given points defined by their coordiantes. Several analytical formulations are available to define interpolation formula. In this article a variations ... -
Gestión del espacio libre en la memoria por actualización continua
Pérez Vidal, Lluís; Vila, R. (Universitat Politècnica de Barcelona. Centre de Càlcul, 1985-12)
Article
Open AccessEn la asignación dinámica de espacio en memoria se plantea el problema de la identificación y la compactación de los intervalos de memoria que ya no son utilizados por ningún proceso. Estos intervalos están dispersos entre ... -
Informàtica bàsica II, ETSEIB. Memòria del curs 1994-1995
Vila Marta, Sebastià; Pla García, Núria; Soto Riera, Antoni; Pérez Vidal, Lluís; Roura Ferret, Salvador; Franquesa Niubó, Marta; Cotrina Navau, Josep; Alquézar Mancho, René; Martínez Parra, Conrado (1995-02-06)
Research report
Open AccessMemòria de l'assignatura d'Infomàtica bàsica II del curs 94-95. -
Informàtica ETSEIB. Resolució d'alguns problemes. Curs 1996-97
Pérez Vidal, Lluís; Pla García, Núria (1997-09)
Research report
Open AccessThis memorandum contains the detailed solution to four classroom problems of Elementary Computer Science. They are adequate for second semester students. The first problem is a simple stocks control application. It involves ... -
Infromàtica Aplicada (3r quadrimestre)
Pérez Vidal, Lluís (Universitat Politècnica de Catalunya, 2002-01-21)
Exam
Restricted access to the UPC academic community -
Open source environment to define constraints in route planning for GIS-T
Pérez Vidal, Lluís; Silveira, A. da Mota (2004-04)
Research report
Open AccessRoute planning for transportation systems is strongly related to shortest path algorithms, an optimization problem extensively studied in the literature. To find the shortest path in a network one usually assigns weights ... -
Plataforma de desenvolupament de pràctiques de gràfics
Ayala Vallespí, M. Dolors; Brunet Crosa, Pere; Esteve Cusiné, Jordi; Joan Arinyo, Robert; Pérez Vidal, Lluís; Puig Puig, Anna; Solano Albajés, Lluís; Tost Pardell, Daniela; Vigo Anglada, Marc; Vilaplana Pastó, Josep (1999-06)
Research report
Open Access -
Searching spatial sense in the ontological world: discovering spatial objects
Morocho Zurita, Villie; Pérez Vidal, Lluís; Saltor Soler, Félix Enrique (2004-05)
Research report
Open AccessThe search of semantic understanding in information systems has led us to take advantage from fields like Natural Language processing from the Artificial Intelligence. This is the case of ontologies which have been used ... -
Semantic integration on spatial databases: SIT-SD prototype
Morocho, Villie; Pérez Vidal, Lluís; Saltor Soler, Félix Enrique (2003)
Conference report
Open AccessProgress on data integration has come to the point that we must deal with the need of semantic integration. ln this work we present a prototype of an integration tool of information sources (Semantic lntegration Tool for ... -
Smooth contour line construction with spline interpolation
Brunet Crosa, Pere; Pérez Vidal, Lluís (Universitat Politècnica de Barcelona. Centre de Càlcul, 1984-09)
Article
Open AccessContour maps are frequently used to represent three-dimensional surfaces from geographical applications or experimental results. In this paper two new algorithms for the generation and display of such contours are ... -
SP: a program for driving instrumentation for a PC
Pérez Vidal, Lluís (1990-11-21)
Research report
Open Access -
Study of sidewalks in the UPC campuses of Barcelona through route planning techniques
Pérez Vidal, Lluís; Pereira, Hernane Borges de Barros (2000-07)
Research report
Open AccessIn this work we will present a study with respect to the sidewalks in the UPC campuses zone of Barcelona by ArcInfo GIS. We have done a specialized bibliographic reference work and an analysis of a first version of the ...