Results 51 to 60 of about 11,880 (211)

Variabilidade espacial das propriedades físicas e químicas do solo em áreas intensamente cultivadas Spatial variability of physical and chemical properties of soil in intensively cultivated areas

Revista Brasileira de Engenharia Agrícola e Ambiental, 2006
Neste trabalho, avaliou-se a variabilidade espacial das propriedades físicas e químicas do solo, visando fornecer subsídios ao manejo localizado de insumos.
Gláucia de Mello, Célia R. P. Bueno, Gener T. Pereira   +2 more
doaj   +1 more source

Global Bottomside Ionospheric Modeling Based on GNSS‐RO Observations From the Tianmu‐1 Constellation

Space Weather, Volume 24, Issue 3, March 2026.
Abstract Radio occultation (RO) observations provide a crucial means for estimating the global Vertical Bottomside Electron Content (VBEC) in the ionosphere. However, the limited number of low Earth orbit (LEO) satellites in existing RO missions restricts the capability for high‐precision reconstruction of global VBEC spatiotemporal variations.
Linghuo Jian, Xiaodong Ren, Yingchuan Yang, Xuan Le, Xiaohong Zhang   +4 more
wiley   +1 more source

Improving Heterogeneous Aquifer Characterization Using a Deep Learning‐Based Ensemble Smoother With a Hybrid Prior Strategy

Water Resources Research, Volume 62, Issue 3, March 2026.
Abstract Accurate characterization of aquifer hydraulic properties is crucial for groundwater resource management and pollution control. Most traditional inverse methods for aquifer characterization rely on unbiased prior assumptions to make robust estimation; however, real‐world applications frequently involve biased priors that can significantly ...
Chenglong Cao, Jiangjiang Zhang, Fenghua You, Tongchao Nan, Jina Yin, Chunhui Lu   +5 more
wiley   +1 more source

Quantifying mean grades and uncertainties from the ratio of service variables: accumulation to thickness. Applied to a phosphate deposit in Southern Mato Grosso, Brazil

REM: International Engineering Journal
Estimating mineral resources of a stratiform mineral deposit is not always a simple activity. Some difficulties can arise in mineral deposits where the thickness is relatively much smaller than the dimensions in the horizontal plane, or because these ...
Guilherme José Rampazzo, Jorge Kazuo Yamamoto, Antônio Tadashi Kikuda   +2 more
doaj   +1 more source

Integrating Deep Learning and Distance‐Based Clustering to Optimize the Field Scale In Situ Uranium Leaching System in Heterogeneous Reservoirs

Water Resources Research, Volume 62, Issue 3, March 2026.
Abstract Utilization of the integrated simulation‐optimization models for supporting decisions of the in situ leaching (ISL) design of uranium (U) mining is often hampered by the physicochemical heterogeneity within the sandstone reservoirs. Nevertheless, the conventional way suffers from a high conceptual uncertainty due to almost ubiquitous ...
Wenjie Qiu, Dianguang Liu, Yun Yang, Jian Song, Weimin Que, Zhengbang Liu, Haicheng Weng, Jianfeng Wu, Jichun Wu   +8 more
wiley   +1 more source

Addressing ecological challenges from a quantum computing perspective

Methods in Ecology and Evolution, Volume 17, Issue 3, Page 632-649, March 2026.
Abstract With increased access to data and the advent of computers, the use of statistical tools and numerical simulations is becoming commonplace for ecologists. These approaches help improve our understanding of ecological phenomena and their underlying mechanisms in increasingly complex environments.
Maxime Clenet, Maxime Dion, F. Guillaume Blanchet   +2 more
wiley   +1 more source

Análise espacial da precipitação pluviométrica no Estado de São Paulo: comparação de métodos de interpolação Spatial analysis of precipitation data in São Paulo State: comparison of interpolation methods

Engenharia Agrícola, 2005
O objetivo deste trabalho é comparar três interpoladores univariados: inverso do quadrado da distância, curvatura mínima e krigagem ordinária usando observações de precipitação pluvial média anual de 1.027 postos pluviométricos abrangendo todo o Estado ...
José R. P. de Carvalho, Eduardo D. Assad   +1 more
doaj   +1 more source

A Multi‐Conceptual Model Approach to Untangling the MADE Experiment

Groundwater, Volume 64, Issue 2, Page 130-147, March/April 2026.
Using the MADE experiment as a case, a multi‐conceptual model roadmap is proposed for holistic assessment of solute transport including uncertainty assessment. This process involves “back to basics” review of the original MADE reports, assessment of knowns and unknowns, and the development of a comprehensive sedimentological model for aquifer ...
Joost C. Herweijer, Steven C. Young, Phil Hayes, Okke Batelaan   +3 more
wiley   +1 more source

Optimizing Flood Hazard Zonation and Planning Landscape‐Based Mitigation Measures in Gimba Sub Watersheds, Northeastern Ethiopia: A Comprehensive Approach

Journal of Flood Risk Management, Volume 19, Issue 1, March 2026.
ABSTRACT Flooding remains one of the most critical natural hazards threatening livelihoods, infrastructure, and ecological systems in Ethiopia's highland landscapes. This study presents a rigorously integrated, multi‐criteria flood risk assessment that combines the Analytical Hierarchy Process (AHP) with GIS‐based spatial modeling to delineate ...
Degfie Teku, Tesfaldet Sisay, Alemnew Ali, Amanuel Ayalew   +3 more
wiley   +1 more source

Produtividade do milho relacionada com a resistência mecânica à penetração do solo sob preparo convencional Relationship between maize yield and soil mechanical resistance to penetration under conventional tillage

Engenharia Agrícola, 2006
A resistência mecânica do solo à penetração exerce grande influência sobre o desenvolvimento vegetal, uma vez que o crescimento das raízes e a produtividade das culturas variam de forma inversamente proporcional ao seu valor.
Onã S. Freddi, Morel P. Carvalho, Valdenir Veronesi Júnior, Guilherme J. Carvalho   +3 more
doaj   +1 more source