Results 11 to 20 of about 2,509 (116)
A PARALLELED DELAUNAY TRIANGULATION ALGORITHM FOR PROCESSING LARGE LIDAR POINTS [PDF]
ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2022 LiDAR is an important data source for disaster prevention and mitigation, its advantages include speediness, penetration, initiative, high-density and high-precision, high efficiency, information-richness.
Y. Song, M. Li, M. Li, X. Liu
doaj +1 more source
Summary on several key techniques in 3D geological modeling. [PDF]
ScientificWorldJournal, 2014 Several key techniques in 3D geological modeling including planar mesh generation, spatial interpolation, and surface intersection are summarized in this paper. Note that these techniques are generic and widely used in various applications but play a key role in 3D geological modeling.
Mei G.
europepmc +2 more sources
Seasonal drought in North America's sagebrush biome structures dynamic mesic resources for sage-grouse. [PDF]
Ecol Evol, 2018 Predictions of intensifying water scarcity raises concerns over new demographic bottlenecks impacting sage‐grouse populations in drought sensitive landscapes. We estimate biome‐wide mesic resource productivity from 1984 to 2016 using remote sensing to identify patterns of food availability influencing selective pressures on sage‐grouse.
Donnelly JP +7 more
europepmc +2 more sources
FDTD Complex Terrain Modeling Method Based on Papery Contour Map
International Journal of Antennas and Propagation, Volume 2023, Issue 1, 2023., 2023 This study aims to develop a finite difference time‐domain (FDTD) modeling method for complex terrain using a paper contour map. First, the image preprocessing technology is employed to segment, denoise, and number the drawing area to arrive at independent figures and curve matrices.
Meng Chen +3 more
wiley +1 more source
Constructing L∞ Voronoi Diagrams in 2D and 3D
Computer Graphics Forum, Volume 41, Issue 5, Page 135-147, August 2022., 2022 Abstract Voronoi diagrams and their computation are well known in the Euclidean L2 space. They are easy to sample and render in generalized Lp spaces but nontrivial to construct geometrically. Especially the limit of this norm with p → ∞ lends itself to many quad‐ and hex‐meshing related applications as the level‐set in this space is a hypercube.
D. R. Bukenberger, K. Buchin, M. Botsch
wiley +1 more source
Soil Use and Management, Volume 38, Issue 1, Page 611-621, January 2022., 2022 Abstract Minimizing slurry phosphorus (P) losses in runoff requires careful management in the context of both soil P surpluses and changing patterns in rainfall. Increasing the time interval between slurry application and the first rainstorm event is known to reduce P loss in runoff although the risk period for elevated P concentrations in runoff can ...
Sharon M. O’Rourke +5 more
wiley +1 more source
Sample Density Clustering Method Considering Unbalanced Data Distribution
Mobile Information Systems, Volume 2022, Issue 1, 2022., 2022 The data distribution of the multidimensional array sensor is unbalanced in data sample collection. To improve the clustering ability of data samples, a data density clustering method of sparse scattered points and multisensor array sensor samples based on the analysis of unbalanced data distribution characteristics is proposed.
Changhui Wang, Santosh Tirunagari
wiley +1 more source
Accurate Volume Calculation Driven by Delaunay Triangulation for Coal Measurement
Scientific Programming, Volume 2021, Issue 1, 2021., 2021 Volume calculation from 3D point cloud is widely used in engineering and applications. The existing methods either have large errors or are time‐consuming. This paper focuses on the coal measurement. Based on the triangular mesh generated from the point cloud, each triangle is projected downward to the base plane to form a voxel.
Yong Liu, Yanwei Zheng, Antonio J. Peña
wiley +1 more source
Multiagent Minimum Risk Path Intrusion Strategy with Computational Geometry
Wireless Communications and Mobile Computing, Volume 2021, Issue 1, 2021., 2021 In wireless sensor networks (WSNs), inefficient coverage does affect the quality of service (QoS), which the minimum exposure path (MEP) is traditionally used to handle. But intelligent mobile devices are generally of limited computation capability, local storage, and energy.
Jianguo Sun +3 more
wiley +1 more source
Resolving the Galactic X-ray background [PDF]
, 2006 We use Chandra deep observations of the Galactic Center (GC) region to improve the constraints on the unresolved fraction of the Galactic X-ray background (also known as the Galactic ridge X-ray emission).
A. Vikhlinin +44 more
core +2 more sources