Results 11 to 20 of about 822,192 (311)

Performance improvement of single- and multi-frequency direct sampling methods in microwave imaging

Results in Physics, 2020
Recently, it turned out that application of multiple frequency direct sampling method (DSM) does not guarantee a good result in microwave imaging. Here we propose and numerically demonstrate alternative single- and multi-frequency indicator functions of ...
Won‐Kwang Park
openalex   +3 more sources

Evolution of the magmatic-hydrothermal system at Lastarria volcano (Northern Chile) between 2006 and 2019: Insights from fluid geochemistry

Frontiers in Earth Science, 2023
One of the major problems in the volcanic surveillance is how data from several techniques can be correlated and used to discriminate between possible precursors of volcanic eruptions and changes related to non-eruptive processes.
Susana Layana, Susana Layana, Susana Layana, Felipe Aguilera, Felipe Aguilera, Felipe Aguilera, Manuel Inostroza, Franco Tassi, Thomas Charles Wilkes, Stefan Bredemeyer, Stefan Bredemeyer, Cristóbal González, Cristóbal González, Tom David Pering, Andrew John Samuel McGonigle   +14 more
doaj   +1 more source

Direct Sampling for Spatially Variable Extreme Event Generation in Resampling‐Based Stochastic Weather Generators

Journal of Advances in Modeling Earth Systems, 2023
Resampling‐based weather generators simulate new time series of weather variables by reordering the observed values such that the statistics of the simulated data are consistent with the observed ones.
Jorge Guevara, Maria Garcia, Priscilla Avegliano, Debora Lima, Dilermando Queiroz, Maysa Macedo, Leonardo Tizzei, Daniela Szwarcman, Bianca Zadrozny, Campbell Watson, Anne Jones   +10 more
doaj   +1 more source

Conditioning Multiple‐Point Statistics Simulation to Inequality Data

Earth and Space Science, 2021
Stochastic modeling is often employed in environmental sciences for the analysis and understanding of complex systems. For example, random fields are key components in uncertainty analysis or Bayesian inverse modeling.
Julien Straubhaar, Philippe Renard
doaj   +1 more source

Validation of a nutria (Myocastor coypus) environmental DNA assay highlights considerations for sampling methodology

Environmental DNA, 2023
Nutria (Myocastor coypus) is a semiaquatic rodent species that is invasive across multiple regions within the United States. Here, we evaluated a qPCR assay previously described for use in Japan for application across invasive populations in the United ...
Anna M. Mangan, John A. Kronenberger, Ian H. Plummer, Taylor M. Wilcox, Antoinette J. Piaggio   +4 more
doaj   +1 more source

Registro preliminar de la herpetofauna asociada a bosque de galería y a la subcuenca del río Camoa de la Reserva El Caduceo, San Martín, Meta, Colombia

Mutis, 2020
Actualmente, en La Reserva Natural El Caduceo, San Martín, Meta, se han registrado cerca de 18 especies de anfibios y 27 de reptiles. Sin embargo, los registros existentes no son suficientes para determinar el estado de sus comunidades, lo que hace cada ...
Valentina Giraldo Gutiérrez, Laura Nathaly Pachón Pontón, Daniela Trujillo Cortés, Juliana Andrea Peñaranda Carrillo, Jordan Steven Ruiz-Toquica   +4 more
doaj   +1 more source

Comparison of reference distributions acquired by direct and indirect sampling techniques: exemplified with the Pediatric Reference Interval in China (PRINCE) study

BMC Medical Research Methodology, 2022
Background Our study aimed to compare the reference distributions of serum creatinine and urea obtained by direct sampling technique and two indirect sampling techniques including the Gaussian Mixture Model (GMM) and the Self-Organizing Map (SOM ...
Ruohua Yan, Kun Li, Yaqi Lv, Yaguang Peng, Nicholas Van Halm-Lutterodt, Wenqi Song, Xiaoxia Peng, Xin Ni   +7 more
doaj   +1 more source

Sampling Methodology of Alphitobius diaperinus (Coleptera: Tenebrionidae) Population in Poultry Houses [PDF]

Brazilian Archives of Biology and Technology, 2019
This paper describes a methodology to evaluate Alphitobius diaperinus (Darkling beetle) population in order to estimate the effectiveness of control methods, consisting of direct sample collections from the poultry litter in 18 points, counting of adults
Daian Guilherme Pinto de Oliveira, Rafael Freire Miguel, Andrea Kusumota Bonini, Luis Francisco Angeli Alves   +3 more
doaj   +1 more source

Depth-of-Field Rendering Using Progressive Lens Sampling in Direct Volume Rendering

IEEE Access, 2020
Direct volume rendering is a widely used technique for extracting information from three-dimensional scalar fields acquired by measurement or numerical simulation.
Jiseon Kang, Jeongjin Lee, Yeong-Gil Shin, Bohyoung Kim   +3 more
doaj   +1 more source

A parsimonious parametrization of the Direct Sampling algorithm for multiple-point statistical simulations

Applied Computing and Geosciences, 2022
Multiple-point statistics algorithms allow modeling spatial variability from training images. Among these techniques, the Direct Sampling (DS) algorithm has advanced capabilities, such as multivariate simulations, treatment of non-stationarity, multi ...
Przemysław Juda, Philippe Renard, Julien Straubhaar   +2 more
doaj   +1 more source