Results 21 to 30 of about 7,795 (232)
Slenderness of pedunculate oak (Quercus robur L.) according to biosocial position
Agronomy Science, 2018 The paper presents results of an analysis of pedunculate oak slenderness. The dependence between slenderness of the oak tree and dimensions of the trunk and the crown dimensions of a single tree were examined.
ZDZISŁAW KACZMARSKI +2 more
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Crown envelope shape measurements and models
Silva Fennica, 2008 This paper addresses tree crown envelope shape modeling from the perspective of optical passive remote sensing. The aims are 1) to review the specific requirements of crown shape models and ground measurement techniques in optical remote sensing, and ...
Rautiainen, Miina +3 more
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Sensors, 2020 Unmanned aerial vehicle (UAV) laser scanning, as an emerging form of near-ground light detection and ranging (LiDAR) remote sensing technology, is widely used for crown structure extraction due to its flexibility, convenience, and high point density ...
Ying Quan +4 more
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Plants, 2021 (1) Background: Boreal forests influence global carbon balance and fulfil multiple ecosystem services. Their vegetation growth and biomass are significantly affected by environmental conditions.
Ján Merganič +5 more
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Open-Grown Crown Radius of Eleven Bottomland Hardwood Species: Prediction and Use in Assessing Stocking [PDF]
Southern Journal of Applied Forestry, 1996 Abstract Equations were prepared to predict crown radius for eleven species of open-grown bottomland hardwood trees. Crown radius was predicted as a function of diameter at breast height (dbh) and as a function of dbh, total height, and crown ratio. Equations were prepared for individual species and species groups.
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AIP Advances, 2020 A tunable surface tension pseudo-potential lattice Boltzmann method (LBM) is applied to study a droplet splashing on a thin film over a rough surface.
Jiayu Zhou +7 more
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Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2014 A simulation of the rolling contact fatigue strength of a traction drive element was developed. This simulation accounts for both the distribution of sizes of inclusions in the element material and the influence of traction forces at the element surface. The shear strength of the matrix structure surrounding an inclusion was estimated with an equation.
Yukihito NARITA +5 more
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iForest - Biogeosciences and Forestry, 2015 Measurements of physical tree crown dimensions were of subjective character in the past, even though they can be considered important for the management of many silvicultural operations, such as timing of thinning operations. In our study we investigated
Seidel D, Schall P, Gille M, Ammer C
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Crown plasticity and competition for canopy space: a new spatially implicit model parameterized for 250 North American tree species. [PDF]
PLoS ONE, 2007 BACKGROUND: Canopy structure, which can be defined as the sum of the sizes, shapes and relative placements of the tree crowns in a forest stand, is central to all aspects of forest ecology.
Drew W Purves +2 more
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Parameterization of height–diameter and crown radius–diameter relationships across the globe
Journal of Plant EcologyAbstract The tree height–diameter at breast height (H–DBH) and crown radius–DBH (CR–DBH) relationships are key for forest carbon/biomass estimation, parameterization in vegetation models and vegetation–atmosphere interactions. Although the H–DBH relationship has been widely investigated on site or regional scales, and a few of studies ...
Shiming Xiang, Jinxu Li, Xiaodong Zeng
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