Search Results - "Cadima, Jorge"

Principal component analysis: a review and recent developments by Jolliffe, Ian T., Cadima, Jorge

“…Large datasets are increasingly common and are often difficult to interpret. Principal component analysis (PCA) is a technique for reducing the dimensionality…”
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Grapevine bunch weight estimation using image-based features: comparing the predictive performance of number of visible berries and bunch area by Lopes, Carlos, Cadima, Jorge

“…Recent advances in machine vision technologies have provided a multitude of automatic tools for recognition and quantitative estimation of grapevine bunch…”
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Variable Selection and the Interpretation of Principal Subspaces by Jorge F. C. L. Cadima, Jolliffe, Ian T.

“…Principal component analysis is widely used in the analysis of multivariate data in the agricultural, biological, and environmental sciences. The first few…”
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Accuracy of daily estimation of grass reference evapotranspiration using ERA-Interim reanalysis products with assessment of alternative bias correction schemes by Paredes, Paula, Martins, Diogo S., Pereira, Luis Santos, Cadima, Jorge, Pires, Carlos

“…•ERA-Iterim reanalysis weather variables were used for computing daily PM-ETo.•The accuracy of weather variables estimation was assessed and temperature was…”
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Principal component analysis: a review and recent developments by Jolliffe, Ian T., Cadima, Jorge

“…Large datasets are increasingly common and are often difficult to interpret. Principal component analysis (PCA) is a technique for reducing the dimensionality…”
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Assessing reference evapotranspiration estimation from reanalysis weather products. An application to the Iberian Peninsula by Martins, Diogo S., Paredes, Paula, Raziei, Tayeb, Pires, Carlos, Cadima, Jorge, Pereira, Luis S.

“…ABSTRACT Computing crop reference evapotranspiration (ETo) with the FAO Penman–Monteith method (PM‐ETo) requires maximum and minimum air temperature, shortwave…”
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Size- and Shape-Related Principal Component Analysis by Jorge F. C. L. Cadima, Jolliffe, Ian T.

“…The separation of morphometric variation into a component related to size and other components associated with shape is of considerable interest and has…”
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Mechanical Pruning and Soil Organic Amending in Two Terroirs. Effects on Wine Chemical Composition and Sensory Profile by Botelho, Manuel, Ribeiro, Henrique, Cruz, Amândio, Duarte, Daniel F., Faria, Diana L., Khairnar, Kaushal S., Pardal, Rafaela, Susini, Marta, Correia, Carlos, Catarino, Sofia, Cadima, Jorge, de Castro, Rogério, Ricardo-da-Silva, Jorge M.

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Modeling germination rate and cardinal temperatures of seven mediterranean crops by Andrade, José A., Cadima, Jorge, Abreu, Francisco M.

“…Understanding the relationship between germination rate and temperature is crucial in predicting crop establishment. Piecewise-linear (broken-stick) functions…”
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Optimizing germination of seven Mediterranean crops by Andrade, José A., Cadima, Jorge, Abreu, Francisco G.

“…Crop establishment is a major factor determining crop productivity. Successful crop establishment requires generalized, fast and concentrated germination…”
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Computational aspects of algorithms for variable selection in the context of principal components by Cadima, Jorge, Cerdeira, J.Orestes, Minhoto, Manuel

“…Variable selection consists in identifying a k-subset of a set of original variables that is optimal for a given criterion of adequate approximation to the…”
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Loading and correlations in the interpretation of principle compenents by Cadima, Jorge, Jolliffe, Ian T.

“…Principles compenents (PC) are often interpreted by looking at the loading for each variable. Variable with a small-magnitude loading are ignored and given PC…”
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Nutritive value of Cisrus salvifolius shrubs for small ruminants by BRUNO-SOARES, A. M, MATOS, Teresa J. S, CADIMA, Jorge

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Modeling target volume flows in forest harvest scheduling subject to maximum area restrictions by Martins, Isabel, Ye, Mujing, Constantino, Miguel, da Conceição Fonseca, Maria, Cadima, Jorge

“…In forest harvest scheduling problems, one must decide which stands to harvest in each period during a planning horizon. A typical requirement in these…”
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Nutritive value of Cistus salvifolius shrubs for small ruminants by Bruno-Soares, A.M., Matos, Teresa J.S., Cadima, Jorge

“…Natural grasslands play an important role in sheep production in Southern Portugal. The increase of browse species ( e.g., Cistus spp. shrubs) supplies green…”
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The eigenstructure of block-structured correlation matrices and its implications for principal component analysis by Cadima, Jorge, Calheiros, Francisco Lage, Preto, Isabel P.

“…Block-structured correlation matrices are correlation matrices in which the p variables are subdivided into homogeneous groups, with equal correlations for…”
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Predicting degradability parameters of diets for ruminants using regressions on chemical components by Bruno-Soares, Arminda Martins, Cadima, Jorge, Matos, Teresa de Jesus S

“…BACKGROUND: Dry matter degradability (DMD) parameters (a, b and c in the Ørskov and McDonald model) are usually determined by the nylon bag technique. The aim…”
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Computational aspects of algorithms for variable selection in the context of principal components: Applications of optimization heuristics to estimation and modelling problems by CADIMA, Jorge, ORESTES CERDEIRA, J, MINHOTO, Manuel

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Some comments on ten Berge, J. M. F. & Kiers, H. A. L. (1996). Optimality criteria for principal component analysis and generalizations by Cadima, Jorge, Jolliffe, Ian

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Topics in Descriptive Principal Component Analysis by Cadima, Jorge Filipe Campinos Landerset

“…Principal Component Analysis (PCA) is viewed as a descriptive multivariate method for a set of n observations on pvariables.Geometric considerations in the…”
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