Results 11 to 20 of about 5,536,955 (291)

Design of data structures for terrain reference navigation [PDF]

open access: yes, 1994
This thesis describes the design of a data structure for use with Digitised Terrain Elevation Data (DTED) in Terrain Reference Navigation (TRN) systems.
Gia, M. C.
core   +7 more sources

Feasibility study for estimating the offshore shear layer from on shore measurements [PDF]

open access: yes, 2011
This paper presents an open source computational fluid dynamics (CFD) study of air flow over a complex terrain. The open source C++ toolbox OpenFOAM has been used for the CFD analysis and the terrain considered is a scale model of Berlengas Island, which
Fabre, Sylvie   +4 more
core   +3 more sources

A CFD technique for estimating the flow distortion effects on LiDAR measurements when made in complex flow fields [PDF]

open access: yes, 2013
The effect of flow distortion on the measurements produced by a LiDAR or SoDAR in close proximity to either complex terrain or a structure creating localised flow distortion is difficult to determine by analytical means.
Astrup, P.   +5 more
core   +3 more sources

Exploring the possible role of small scale terrain drag on stable boundary layers over land [PDF]

open access: yes, 2008
This paper addresses the possible role of unresolved terrain drag, relative to the turbulent drag on the development of the stable atmospheric boundary layer over land.
Mahrt, L.   +4 more
core   +1 more source

The Complexity of Guarding Terrains

open access: yesCoRR, 2009
A set $G$ of points on a 1.5-dimensional terrain, also known as an $x$-monotone polygonal chain, is said to guard the terrain if any point on the terrain is 'seen' by a point in $G$. Two points on the terrain see each other if and only if the line segment between them is never strictly below the terrain.
James King 0001, Erik Krohn
openaire   +3 more sources

Using acoustic sensor technologies to create a more terrain capable unmanned ground vehicle [PDF]

open access: yes, 2009
Unmanned Ground Vehicle’s (UGV) have to cope with the most complex range of dynamic and variable obstacles and therefore need to be highly intelligent in order to cope with navigating in such a cluttered environment.
Mehmet Ali Erbil   +9 more
core   +1 more source

Distributed texture-based terrain synthesis [PDF]

open access: yes, 2011
Terrain synthesis is an important field of Computer Graphics that deals with the generation of 3D landscape models for use in virtual environments. The field has evolved to a stage where large and even infinite landscapes can be generated in realtime ...
Tasse, Flora Ponjou
core   +1 more source

Computational Fluid Dynamics (CFD) Investigation of Wind Turbine Nacelle Separation Accident over Complex Terrain in Japan

open access: yesEnergies, 2018
We have developed an unsteady and non-linear wind synopsis simulator called RIAM-COMPACT (Research Institute for Applied Mechanics, Kyushu University, COMputational Prediction of Airflow over Complex Terrain) to simulate the airflow on a micro scale, i.e.
Takanori Uchida
doaj   +1 more source

Performance of CMIP6 Models in Capturing Summer Maximum Temperature Variability over China

open access: yesAtmosphere
Previous research has primarily focused on assessing seasonal mean or annual extreme climate events, whereas intraseasonal variability in extreme climate has received comparatively little attention, despite its importance for understanding short-term ...
Sikai Liu   +6 more
doaj   +1 more source

Vegetation Carbon Sequestration across China’s Aridity Gradient: Meteorological and Human Impacts (2001 to 2020)

open access: yesEcosystem Health and Sustainability
Vegetation carbon sequestration capacity (VCSC) is essential for carbon neutrality, but systematic research on its spatiotemporal patterns and driving mechanisms across China’s moisture zones remains insufficient. Based on China’s VCSC datasets from 2001
Ludan Li   +9 more
doaj   +1 more source

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