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Showing 1 to 4 of 4 (0.029 seconds)Spelling suggestions: "subject:"gammon"" "subject:"mammon""
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[en] CONSTRUCTION OF PERCEPTUALLY UNIFORM EUCLIDEAN COLOR SPACES BASED ON THE CIEDE2000 FORMULA / [pt] CONSTRUÇÃO DE ESPAÇOS DE COR EUCLIDIANOS E PERCEPTUALMENTE UNIFORMES COM BASE NA FÓRMULA CIEDE2000LORENZO FRANCESCO GIOVANNI GINO MARIA RIDOLFI 08 January 2014 (has links)
[pt] Nos últimos anos, diversas fórmulas de diferença de cores foram desenvolvidas
para o espaço CIELAB, tais como CMC, CIE94 e CIEDE2000. Embora
essas fórmulas obtenham maior precisão na medida perceptual entre
cores, muitas aplicações não podem usufruir desta maior precisão, pois as
distâncias euclidianas no CIELAB não são isométricas de acordo com essas
novas fórmulas. Com isso, aplicações como gamut mapping e interpolação de cores precisam de um espaço de cores que seja isométrico em relação
as fórmulas mais recentes de medição de diferenças de cores. Esse trabalho
estuda o mapeamento do espaço CIELAB, em particular do plano ab deste
espaço, sob a métrica da fórmula CIEDE2000, por meio de técnicas de
escalonamento multidimensional, ou Multidimensional Scaling (MDS), tais
como o ISOMAP e uma otimizaçãobaseada em Sammon Mapping. / [en] In recent years, various color difference formulas were developed for
the CIELAB space, such as CMC, CIE94 and CIEDE2000. Although
these formulas have achieved greater accuracy in perceptual measurement
between colors, many applications cannot take advantage of this greater
precision, because the Euclidean distances in CIELAB are not isometric
in accordance with these new formulas. Thus, applications such as gamut
mapping and color interpolation need a color space that is isometric in relation
to the latest color difference formulas. This paper studies the mapping
of the CIELAB space, particularly the ab plane of this space according to
the metrics of the CIEDE2000 formula, through multidimensional scaling
(MDS) techniques, more specifically ISOMAP and an optimization based
on Sammon Mapping.
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Netiesinių daugdarų atpažinimo metodų taikymo web-kamera gautiems vaizdų rinkiniams analizuoti tyrimas / Analysis of non-linear manifold learning methods applied on image collections provided by webcamPetrauskas, Ignas 04 July 2014 (has links)
Šiame darbe nagrinėjami netiesiniai daugdarų atpažinimo metodai ir daugiamačių duomenų projekcijos metodai. Siūloma jais spręsti keliais laisvės laipsniais besisukančio objekto orientacijos radimo problemą. Aprašomi MDS, Trianguliacijos, Sammon, RPM, mRPM, CCA, PCA, LLE, LE, HLLE, LTSA, SMACOF ir Isomap metodai. Su kai kuriais iš jų atliekami web-kamera gautų galvos atvaizdų tyrimai. Isomap algoritmo pagrindu sukuriama programinė įranga ir su ja taipogi atliekami galvos orientacijos tyrimai. / This paper deals with Analysis of non-linear manifold learning methods and multidimensional data projection methods. It is proposed use them in solving problem of detection of orientation of object, moving in few degrees of freedom. Methods described: MDS, triangulation, Sammon, RPM, mRPM, CCA, PCA, LLE, LE, HLLE, LTSA, SMACOF and Isomap. Some of them are used to analyze head images acquired by webcam.. Application is created which is then used to analyze head orientation by implementing Isomap method.
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Minería de datos aplicada a la mejora de procesos de extrusión de elastómerosBarreto Cabrera, Claudia 11 December 2009 (has links)
Este trabajo se ha centrado en el proceso de extrusión de perfiles de goma para la industria de la automoción. Los perfiles de goma son productos largos y de muy variadas formas que se colocan en los automóviles para proporcionar hermeticidad y estanqueidad en puertas y ventanillas. Con el uso de los perfiles se evitan varios inconvenientes en el automóvil, tales como ruidos indeseables del medio externo, vibraciones, así como la entrada de agua y aire.
La línea de fabricación de los perfiles de goma, está compuesta por varios procesos, tales como la extrusión, el moleteado, el vulcanizado, el flockado y el corte del producto al tamaño indicado, de acuerdo al modelo del automóvil. De los procesos antes mencionados la investigación se centró en la extrusión, ya que a pesar de que su uso se remonta al año 1800 [Bhowmick et al. (1994), Rauwendaal (2002)], aún hay mucho por conocer de él.
De acuerdo al Consorcio Nacional de la Industria del Caucho en España, en el año 2005, el 40% de las ventas de productos de goma en este país fueron destinadas al sector de la automoción [CNIC (2005)]. Asimismo, España es el tercer fabricante europeo de productos de goma desde el 2001.
Con el objetivo de facilitar, tanto el control de calidad como el control de producción del producto, se lleva a cabo el registro detallado de los parámetros importantes de fabricación de los perfiles. Es decir, se realiza la trazabilidad del producto. Lo que permite proporcionar conocimiento del proceso productivo para determinar, en un momento dado, las causas de un posible defecto, incluso después de haber salido de fábrica y remontarse, si es necesario, a la calidad de las materias primas utilizadas. Se ha supuesto que los problemas surgen durante la extrusión y no en los procesos posteriores a éste.
Al revisar la literatura, se han encontrado aplicaciones exitosas en el ámbito industrial [Rodríguez et al. (2003), Martínez de Pisón et al. (2003), Martínez de Pisón et al. (2005)]. / Barreto Cabrera, C. (2009). Minería de datos aplicada a la mejora de procesos de extrusión de elastómeros [Tesis doctoral no publicada]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/6608 / Palancia
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Individualization of fixed-dose combination regimens : Methodology and application to pediatric tuberculosis / Individualisering av design och dosering av kombinationstabletter : Metodologi och applicering inom pediatrisk tuberkulosYngman, Gunnar January 2015 (has links)
Introduction: No Fixed-Dose Combination (FDC) formulations currently exist for pediatric tuberculosis (TB) treatment. Earlier work implemented, in the software NONMEM, a rational method for optimizing design and individualization of pediatric anti-TB FDC formulations based on patient body weight, but issues with parameter estimation, dosage strata heterogeneity and representative pharmacokinetics remained. Aim: To further develop the rational model-based methodology aiding the selection of appropriate FDC formulation designs and dosage regimens, in pediatric TB treatment. Materials and Methods: Optimization of the method with respect to the estimation of body weight breakpoints was sought. Heterogeneity of dosage groups with respect to treatment efficiency was sought to be improved. Recently published pediatric pharmacokinetic parameters were implemented and the model translated to MATLAB, where also the performance was evaluated by stochastic estimation and graphical visualization. Results: A logistic function was found better suited as an approximation of breakpoints. None of the estimation methods implemented in NONMEM were more suitable than the originally used FO method. Homogenization of dosage group treatment efficiency could not be solved. MATLAB translation was successful but required stochastic estimations and highlighted high densities of local minima. Representative pharmacokinetics were successfully implemented. Conclusions: NONMEM was found suboptimal for the task due to problems with discontinuities and heterogeneity, but a stepwise method with representative pharmacokinetics were successfully implemented. MATLAB showed more promise in the search for a method also addressing the heterogeneity issue.
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