Results 41 to 50 of about 1,675 (179)

Diagnosis of Lung Nodule Using the Semivariogram Function [PDF]

, 2004
This paper proposes using the semivariogram function, to help characterize lung nodules as malignant or benign in computerized tomography images.
Aristófanes C. Silva, Perfilino Eugênio Ferreira Jr., Paulo Cezar Pinto Carvalho, Marcelo Gattass   +3 more
openaire   +1 more source

Scale Dependence of Woody Plant β‐Diversity in a Tropical Rainforest Metacommunity

Ecology and Evolution, Volume 16, Issue 7, July 2026.
Using a scale‐explicit metacommunity framework in a tropical rainforest, we examined how woody plant compositional dissimilarity and its replacement and richness‐difference components vary across spatial extents. Compositional dissimilarity increased modestly with extent but remained consistently dominated by species replacement, while environmental ...
Jie Yao, Xinran Li, Shinichi Tatsumi, Yi Ding, Jihong Huang, Yue Xu, Zhidong Zhang, Wenxing Long, Runguo Zang   +8 more
wiley   +1 more source

Fast semivariogram computation using FPGA architectures

SPIE Proceedings, 2015
The semivariogram is a statistical measure of the spatial distribution of data and is based on Markov Random Fields (MRFs). Semivariogram analysis is a computationally intensive algorithm that has typically seen applications in the geosciences and remote sensing areas.
Yamuna Lagadapati, Mukul V. Shirvaikar, Xuanliang N. Dong   +2 more
openaire   +2 more sources

NowPrecip 2: Precipitation nowcasting in the complex terrain of Switzerland. Part II: Verification

Quarterly Journal of the Royal Meteorological Society, Volume 152, Issue 778, July 2026 Part A.
In this work we present the verification of the NowPrecip precipitation nowcasting systems (version 1 and version 2). Using 3.5 years of data over the period 2020–2023, their performance is compared with PySTEPS and the ICON numerical weather prediction ensemble by computing deterministic and probabilistic metrics.
A. Ntoumos, I. V. Sideris, A. Berne, A. Hering, P. Juda, M. Gabella, M. Boscacci, L. Clementi, U. Germann   +8 more
wiley   +1 more source

Fractal dimension and geostatistical parameters for soil microrelief as a function of cumulative precipitation Parâmetros fractais e geoestatística do microrrelevo do solo em função de chuva acumulada

Scientia Agricola, 2010
Surface roughness isinfluenced by type and intensity of soil tillage among other factors, and it changes considerably with rain. In microrelief studies the advantages of using indices such as the fractal dimension, D, and the crossover length, l, is that
Eva Vidal Vázquez, Sidney Rosa Vieira, Isabella Clerici De Maria, Antonio Paz González   +3 more
doaj   +1 more source

A modified water drop method for addressing the spatial variability of hydrophobicity within individual pedons

Soil Science Society of America Journal, Volume 90, Issue 4, July/August 2026.
Abstract The development of hydrophobic layers during wildfire is well‐documented. Tests are often performed on a few points at the mineral soil surface. However, this may not accurately capture the spatial extent of these layers laterally or vertically.
Benjamin C. Newcomb, Daniel R. Hirmas, Andrew Gray, Kevin Gaston, Nicholas Handman, Dustin L. Herrmann, Yujuan Chen   +6 more
wiley   +1 more source

Object-based change detection using semivariogram indices derived from NDVI images: The environmental disaster in Mariana, Brazil

Ciência e Agrotecnologia
Object-based change detection is a powerful analysis tool for remote sensing data, but few studies consider the potential of temporal semivariogram indices for mapping land-cover changes using object-based approaches.
Eduarda Martiniano de Oliveira Silveira, Fausto Weimar Acerbi Júnior, José Márcio de Mello, Inácio Thomaz Bueno   +3 more
doaj   +1 more source

Geodetic Constraints on Fault Kinematics and Dynamics of 2021 Maduo Earthquake: Implications for Fault Friction

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 7, July 2026.
Abstract Postseismic afterslip has been inferred to occur on fault barriers surrounding coseismic asperities, which can be explained by velocity‐strengthening friction in barriers and velocity‐weakening friction in asperities. However, afterslip also exhibits spatial overlap with coseismic slip for some events.
Yuan Gao, Qi Ou, Jin Fang, Manon Carpenter, Tim J. Wright, Kali Allison, Wei Qu, Qin Zhang, Milan Lazecký, Yasser Maghsoudi, Zhong Lu   +10 more
wiley   +1 more source

Streamflow Spatial Correlation Length Increases During Storms and Its Application in Data Assimilation Improves Streamflow Predictions

Water Resources Research, Volume 62, Issue 7, July 2026.
Abstract The spatial correlation of streamflow in a river network captures how flows at different locations relate to one another and influence the downstream response. In this study, we analyze the spatial correlation of streamflow and rainfall during storm events in three Texas watersheds: San Antonio (2015 and 2016 storms), Guadalupe (2018 storm ...
Sujana Timilsina, Paola Passalacqua
wiley   +1 more source

Optimizing RWIS Locations with Wasserstein Distance and Geostatistics: A Case Study in South Korea

Future Transportation
Road Weather Information Systems (RWISs) are essential components of modern Intelligent Transportation Systems (ITSs) deployed in cold regions to gather real-time data on winter weather and road surface conditions.
Nancy Huynh, Jinhwan Jang, Tae J. Kwon
doaj   +1 more source