Results 41 to 50 of about 101,580 (184)

A Discrete Element Method–Based Energetic Approach to Model Two‐Dimensional Fatigue Crack Propagation

International Journal for Numerical and Analytical Methods in Geomechanics, Volume 49, Issue 5, Page 1420-1436, 10 April 2025.
ABSTRACT In this work, a fatigue crack propagation model is proposed using the two‐dimensional discrete element method (DEM). The challenge lies in describing the small progressive fatigue crack growth within a single cycle, which is typically much smaller than the size of the smallest particles, making it difficult to continuously capture the loss of ...
Lei Ma, Georg Koval, Cyrille Chazallon, Yannick Descantes   +3 more
wiley   +1 more source

The approach for combining dem acquisitions for the TanDEM-X dem mosaic [PDF]

2013 IEEE International Geoscience and Remote Sensing Symposium - IGARSS, 2013
For the global TanDEM-X DEM the whole world will be acquired by at least two coverages. Thereby on the one hand phase unwrapping errors are reduced by applying the dual-baseline method and on the other hand a low noise level is ensured even for difficult areas like forests and steep terrain.
Gruber, Astrid, Wessel, Birgit, Huber, Martin, Breunig, Markus, Wagenbrenner, Susanne   +4 more
openaire   +2 more sources

Bias Correction of Satellite Precipitation Estimation Using Deep Neural Networks and Topographic Information Over the Western U.S.

Journal of Geophysical Research: Atmospheres, Volume 130, Issue 4, 28 February 2025.
Abstract Satellite‐based precipitation products (SPPs) have gained popularity among researchers due to their utility in hydrologic studies. Several gridded satellite‐based precipitation products with global coverage, such as the Integrated Multi‐satellitE Retrievals for GPM (IMERG) and the Precipitation Estimation from Remotely Sensed Information using
Vu Dao, Claudia Jimenez Arellano, Phu Nguyen, Fahad Almutlaq, Kuolin Hsu, Soroosh Sorooshian   +5 more
wiley   +1 more source

Individual Tree Position Extraction and Structural Parameter Retrieval Based on Airborne LiDAR Data: Performance Evaluation and Comparison of Four Algorithms

Remote Sensing, 2020
Information for individual trees (e.g., position, treetop, height, crown width, and crown edge) is beneficial for forest monitoring and management.
Wei Chen, Haibing Xiang, Kazuyuki Moriya
doaj   +1 more source

Spatial distribution of urban basic education resources in Shanghai: Accessibility and supply-demand matching evaluation

Open Geosciences, 2023
This article focuses on Shanghai as a case study and utilizes various factors such as points of interest, nighttime lights, land use, road networks, and Digital Elevation Model to examine the spatial distribution of population.
Yuan Hongfu, Yang Xiangguo
doaj   +1 more source

The Study of Water Content on the Coal Loading Performance of Thin Coal Seam Shearer Drum by Discrete Element Method (DEM)

Engineering Reports, Volume 7, Issue 1, January 2025.
Loading methods, helical angles, and rotation speed of drum have significant effects on the loading rate of drum. In this study, Discrete Element Method (DEM) is used to study what effects of these several factors have on the loading rate under different water contents.
Kuidong Gao, Wenhe Zhang, Yuanjin Zhang, Weipeng Xu, Liqing Sun   +4 more
wiley   +1 more source

The performance of landslide susceptibility models critically depends on the quality of digital elevation models

Geomatics, Natural Hazards & Risk, 2020
Considering the critical importance of the quality of input data for landslide susceptibility, we investigate the performance improvements that can be achieved by different globally available digital elevation models (DEMs) using different state-of-the ...
Jonas Brock, Patrick Schratz, Helene Petschko, Jannes Muenchow, Mihai Micu, Alexander Brenning   +5 more
doaj   +1 more source

Macro–Microscopic Mechanical Study of Clay–Structure Interface Shear Behavior Using Direct Shear Testing and DEM Simulation

Advances in Civil Engineering, Volume 2025, Issue 1, 2025.
Understanding the interface shear behavior between clay and structures is crucial in geotechnical engineering. The mechanism of the roughness effect in the shear process between the clay and structures was studied to reveal the macroscopic and microscopic interface shear behavior.
Tingting Sun, Jingnan Yang, Kuang Shi, Shufeng Lin, Jixing Yang, Yi Shan   +5 more
wiley   +1 more source

Choosing the Optimal Global Digital Elevation Model for Stream Network Delineation: Beyond Vertical Accuracy

Earth and Space Science, Volume 11, Issue 12, December 2024.
Abstract Satellite‐derived global digital elevation models (DEMs) are essential for providing the topographic information needed in a wide range of hydrological applications. However, their use is limited by spatial resolution and vertical bias due to sensor limitations in observing bare terrain.
Jana Marešová, Petr Bašta, Kateřina Gdulová, Vojtěch Barták, Giorgi Kozhoridze, Jiri Šmída, Yannis Markonis, Duccio Rocchini, Jiří Prošek, Petra Pracná, Vítězslav Moudrý   +10 more
wiley   +1 more source

Shear test as calibration experiment for DEM simulations: Spheropolygonal particle model [PDF]

FME Transactions
The rapid development of computer technology provides an opportunity for researchers dealing with discrete element modeling to develop more accurate particle models.
Huang Junhao, Safranyik Ferenc, Tóth János, Keppler István   +3 more
doaj   +1 more source