Results 21 to 30 of about 1,562 (177)

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 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

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

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

Improving Estimations of Spatial Distribution of Soil Respiration Using the Bayesian Maximum Entropy Algorithm and Soil Temperature as Auxiliary Data. [PDF]

PLoS ONE, 2016
Soil respiration inherently shows strong spatial variability. It is difficult to obtain an accurate characterization of soil respiration with an insufficient number of monitoring points. However, it is expensive and cumbersome to deploy many sensors.
Junguo Hu, Jian Zhou, Guomo Zhou, Yiqi Luo, Xiaojun Xu, Pingheng Li, Junyi Liang   +6 more
doaj   +1 more source

Variograms for kriging and clustering of spatial functional data with phase variation

Spatial Statistics, 2022
Spatial, amplitude and phase variations in spatial functional data are confounded. Conclusions from the popular functional trace-variogram, which quantifies spatial variation, can be misleading when analyzing misaligned functional data with phase variation.
Xiaohan Guo, Sebastian Kurtek, Karthik Bharath   +2 more
openaire   +3 more sources

Analysis and spatial prediction of water retention curves in two types of soil

Revista Brasileira de Engenharia Agrícola e Ambiental
Soil is a medium that stores and transfers air, water, nutrients and heat to microorganisms and plants. Its water storage capacity is studied by analysing water retention curves (WRCs), which establish the relationship between soil water content and the ...
Diego L. Cortés-Delgadillo, Jesús H. Camacho Tamayo, Ramón Giraldo   +2 more
doaj   +1 more source

Spatial prediction of soil penetration resistance using functional geostatistics

Scientia Agricola
Knowledge of agricultural soils is a relevant factor for the sustainable development of farming activities. Studies on agricultural soils usually begin with the analysis of data obtained from sampling a finite number of sites in a particular region of ...
Diego Leonardo Cortés-D, Jesús Hernán Camacho-Tamayo, Ramón Giraldo   +2 more
doaj   +1 more source

Design and optimization of wall-climbing robot impeller by genetic algorithm based on computational fluid dynamics and kriging model

Scientific Reports, 2022
In recent years, wall-climbing robots have begun to replace manual work at heights to reduce economic losses and casualties caused by working at heights. This paper designs a negative pressure adsorption type wall-climbing robot and analyzes the internal
Yi Fang, Shuai Wang, Da Cui, Qiushi Bi, Ruihua Jiang, Chuliang Yan   +5 more
doaj   +1 more source