Examinando por Autor "Ruíz, Ó."

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    Ítem
    Numerical estimation of Carbonate properties using a digital rock physics workflow
    (2014) Osorno, M.; Uribe, D.; Saenger, E.H.; Madonna, C.; Steeb, H.; Ruíz, Ó.; Universidad EAFIT. Departamento de Ingeniería Mecánica; Laboratorio CAD/CAM/CAE
    Digital rock physics combines modern imaging with advanced numerical simulations to analyze the physical properties of rocks -- In this paper we suggest a special segmentation procedure which is applied to a carbonate rock from Switzerland -- Starting point is a CTscan of a specimen of Hauptmuschelkalk -- The first step applied to the raw image data is a nonlocal mean filter -- We then apply different thresholds to identify pores and solid phases -- Because we are aware of a nonneglectable amount of unresolved microporosity we also define intermediate phases -- Based on this segmentation determine porositydependent values for the pwave velocity and for the permeability -- The porosity measured in the laboratory is then used to compare our numerical data with experimental data -- We observe a good agreement -- Future work includes an analytic validation to the numerical results of the pwave velocity upper bound, employing different filters for the image segmentation and using data with higher resolution
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    Ítem
    Specification for a Process Planning Enabling Platform
    (Wiley, 1995) Carr, K.; Hetem, V.; Lucenti, M.; Ruíz, Ó.; Zhu, X.; Ferreira, P.M.; Lu, S.C.; Universidad EAFIT. Departamento de Ingeniería Mecánica; Laboratorio CAD/CAM/CAE
    The objective of this research is the specification of an enabling platform for process planning system development -- This work was done under a contract issued by Computer Aided Manufacturing-International to the University of Illinois -- An analysis framework is developed that integrates inter-related process planning activities by transforming inputs and controls through mechanisms into outputs -- An object-oriented approach is used to define the object model and thereby facilitate the configuration of a process planning system by providing standardised data objects and fundamental library routines -- The proposed software structure is layered with specific modules designed to support integration and data exchange -- The development domain is machining and includes part understanding, process selection and ordering, equipment specification, setup and operation planning, manufacturability analysis, and plan evaluation and documentation