Results 21 to 30 of about 14,309 (209)

How many trees to see the forest? Assessing the effects of morphospace coverage and sample size in performance surface analysis

Methods in Ecology and Evolution, 2021
Linking morphology and function is critical to understanding the evolution of organismal shape. Performance landscapes, or performance surfaces, associate empirical functional performance data with a morphospace to assess how shape variation relates to ...
Stephanie M. Smith, C. Tristan Stayton, Kenneth D. Angielczyk   +2 more
doaj   +1 more source

Intrinsic random functions and universal kriging on the circle [PDF]

Statistics & Probability Letters, 2016
14 pages, initial ...
Chunfeng Huang, Haimeng Zhang, Scott M. Robeson   +2 more
openaire   +2 more sources

Means and covariance functions for geostatistical compositional data: an axiomatic approach [PDF]

, 2017
This work focuses on the characterization of the central tendency of a sample of compositional data. It provides new results about theoretical properties of means and covariance functions for compositional data, with an axiomatic perspective.
A Kolmogorov, D Billheimer, Denis Allard, DJJ Walvoort, G Mateu-Figueras, H Wackernagel, J Aczél, J Aczél, J Aitchison, J Aitchison, J Aitchison, J Matkowski, JD Helterbrand, JJ Egozcue, JJ Egozcue, JL Scealy, JP Chilès, KL Arrow, N Cressie, P Bogaert, R Tolosana-Delgado, RF Shurtz, RY Liu, Thierry Marchant, V Pawlowksy-Glahn, V Pawlowksy-Glahn, WE Miller, WE Sharp, Y Vardi, Y Zuo   +29 more
core   +2 more sources

Gap-filling a spatially explicit plant trait database: comparing imputation methods and different levels of environmental information [PDF]

Biogeosciences, 2018
The ubiquity of missing data in plant trait databases may hinder trait-based analyses of ecological patterns and processes. Spatially explicit datasets with information on intraspecific trait variability are rare but offer great promise in improving ...
R. Poyatos, R. Poyatos, O. Sus, L. Badiella, M. Mencuccini, M. Mencuccini, J. Martínez-Vilalta, J. Martínez-Vilalta   +7 more
doaj   +1 more source

Prediction of spatial functional random processes: comparing functional and spatio-temporal kriging approaches [PDF]

Stochastic Environmental Research and Risk Assessment, 2019
33 pages, 11 ...
Johan Strandberg, Sara Sjöstedt de Luna, Jorge Mateu   +2 more
openaire   +4 more sources

Space time analysis of dengue fever diagnosed through a network of laboratories in India from 2014–2017

Journal of Vector Borne Diseases, 2020
Background & objectives: The Department of Health Research and the Indian Council of Medical Research, Government of India, have established Virus Research and Diagnostic Laboratory Network (VRDLN) to strengthen the laboratory capacity in the country for
Vasna Joshua, K Kanagasabai, R Sabarinathan, M Ravi, B K Kirubakaran, V Ramachandran, Vishal Shete, A Kethara Gowri, Manoj V Murhekar   +8 more
doaj   +1 more source

Evaluation of pedotransfer functions for predicting soil hydraulic properties: A voyage from regional to field scales across Europe

Journal of Hydrology: Regional Studies, 2021
Study region: Europe. A total of 660, 522, and 4940 soil samples belonging to GRIZZLY, HYPRES, and EU-HYDI databases, respectively, were used for parametric evaluation.
P. Nasta, B. Szabó, N. Romano
doaj   +1 more source

Intrinsic Random Function Kriging on the Sphere

Journal of Statistical Theory and Practice
Abstract Intrinsic random functions (IRFs) can be used to model spatial processes on the sphere. To perform kriging using IRFs, one needs the knowledge of the IRF order (i.e., the degree of non-homogeneity) and its associate generalized covariance function, which are challenging in Euclidean spaces and hinder its practice.
Nicholas W. Bussberg, Jacob Shields, Chunfeng Huang   +2 more
openaire   +3 more sources

Function-on-function kriging, with applications to 3D printing of aortic tissues [PDF]

Technometrics, 2019
3D-printed medical prototypes, which use synthetic metamaterials to mimic biological tissue, are becoming increasingly important in urgent surgical applications. However, the mimicking of tissue mechanical properties via 3D-printed metamaterial can be difficult and time-consuming, due to the functional nature of both inputs (metamaterial structure) and
Chen, Jialei, Mak, Simon, Joseph, V. Roshan, Zhang, Chuck   +3 more
openaire   +3 more sources

Sensitivity analysis of expensive black-box systems using metamodeling [PDF]

, 2016
Simulations are becoming ever more common as a tool for designing complex products. Sensitivity analysis techniques can be applied to these simulations to gain insight, or to reduce the complexity of the problem at hand.
Couckuyt, Ivo, Dhaene, Tom, van der Herten, Joachim, Van Steenkiste, Tom   +3 more
core   +2 more sources