Results 31 to 40 of about 23,397 (235)
On Procrustes Analysis in Hyperbolic Space [PDF]
IEEE Signal Processing Letters, 2021 Congruent Procrustes analysis aims to find the best matching between two point sets through rotation, reflection and translation. We formulate the Procrustes problem for hyperbolic spaces, review the canonical definition of the center of point sets, and give a closed form solution for the optimal isometry for noise-free measurements.
Puoya Tabaghi, Ivan Dokmanic
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Point distribution form model for spruce stems (Picea abies [L.] Karst.)
Journal of Forest Science, 2002 The paper deals with the construction of a point distribution form model for spruce stems. This model is based on the principal components analysis of variance-covariance matrix formed for the Procrustes residuals.
M. Křepela
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Generalized Procrustes Analysis
Psychometrika, 1975 Suppose Pi(i) (i = 1, 2, ..., m, j = 1, 2, ..., n) give the locations of mn points in p-dimensional space. Collectively these may be regarded as m configurations, or scalings, each of n points in p-dimensions. The problem is investigated of translating, rotating, reflecting and scaling the m configurations to minimize the goodness-of-fit criterion Σi ...
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Covariance Weighted Procrustes Analysis [PDF]
, 2016 We revisit the popular Procrustes matching procedure of landmark shape analysis and consider the situation where the landmark coordinates have a completely general covariance matrix, extending previous approaches based on factored covariance structures.
Brignell, CJ, Browne, WJ, Dryden, IL
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PROCRUSTES: A computer algebra package for post-Newtonian calculations in General Relativity [PDF]
, 2006 We report on a package of routines for the computer algebra system Maple which supports the explicit determination of the geometric quantities, field equations, equations of motion, and conserved quantities of General Relativity in the post-Newtonian ...
Brumberg +9 more
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Most Likely Separation of Intensity and Warping Effects in Image Registration
, 2017 This paper introduces a class of mixed-effects models for joint modeling of spatially correlated intensity variation and warping variation in 2D images. Spatially correlated intensity variation and warp variation are modeled as random effects, resulting ...
Kühnel, Line +3 more
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Prenatal development of skull and brain in a mouse model of growth restriction [PDF]
, 2016 Patterns of covariation result from the over-lapping effect of several developmental processes. By perturbing certain specific developmental processes, ex-perimental studies contribute to a better understanding of their particular effects on the ...
Barbeito Andrés, Jimena +2 more
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Evaluating the Predictive Power of Ordination Methods in Ecological Context
Mathematics, 2018 When striving for the ordination methods best predicting independently measured site factors, the following questions arise: does the optimal choice depend on the kind of biological community analysed?
Otto Wildi
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Do cladistic and morphometric data capture common patterns of morphological disparity? [PDF]
, 2015 The distinctly non-random diversity of organismal form manifests itself in discrete clusters of taxa that share a common body plan. As a result, analyses of disparity require a scalable comparative framework.
Adams +40 more
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Advanced Science, EarlyView.Pharmaceutical diversity acts as an independent driver of antibiotic resistance in soil invertebrates. While bulk soil remains unaffected, the collembolan gut microbiome exhibits significant resistance gene enrichment under complex chemical exposure and diurnal warming.
Yi‐Fei Wang +11 more
wiley +1 more source