Results 21 to 30 of about 81,520 (219)

Soil Erosion across Scales: Assessing Its Sources of Variation in Sahelian Landscapes under Semi-Arid Climate

open access: yesLand, 2022
Soil erosion varies in space and time. As the contributing surface area increases, heterogeneity effects are amplified, inducing scale effects. In the present study, soil erosion processes as affected by the observation scale and the soil surface ...
Lawani Adjadi Mounirou   +6 more
doaj   +1 more source

Scale Effects on a Tip Rake Propeller Working in Open Water

open access: yesJournal of Marine Science and Engineering, 2019
The scale effect on the accuracy of a numerical simulation in ship hydrodynamics represents an important issue of the propeller numerical analysis. To grasp a better understanding on the influence of this effect, an introspection on the performances of ...
Adrian Lungu
doaj   +1 more source

Exact solutions of bending deflection for single-walled BNNTs based on the classical Euler–Bernoulli beam theory

open access: yesNanotechnology Reviews, 2020
At the nanolevel, a classical continuum approach seems to be inapplicable to evaluate the mechanical behaviors of materials. With the introduction of scale parameter, the scale effect can be reasonably described by the modified continuum theory.
Yawei Dong, Yang Zhang, Jianwei Yan
doaj   +1 more source

Research on the scale effects of solute transport in a bended karst conduit

open access: yesShuiwen dizhi gongcheng dizhi, 2023
Research on the scale effect of solute transport in karst conduits is very important for the correct interpretation of breakthrough curves (BTCs), but the scale effect of solute transport in a bended conduit has not been examined.
Xiaoer ZHAO   +3 more
doaj   +1 more source

Scale effects and full-scale ship hydrodynamics: A review [PDF]

open access: yesOcean Engineering, 2022
Historically, the field of naval architecture has relied on a combination of model testing and scaling laws, known as extrapolation procedures, to predict full-scale power requirements. Numerous problems with extrapolation procedures were identified almost as soon as they were proposed, but since there were no alternative scaling laws their use ...
Terziev, Momchil   +2 more
openaire   +3 more sources

Analysis and application of modern supply chain system in China [PDF]

open access: yesModern Supply Chain Research and Applications, 2019
Purpose – The purpose of this paper is make a significant contribution to the supply chain knowledge system through research on modern supply chain system in China, providing guidance for theoretical research such as methodology of dynamic resource ...
Lihua Chen, Yi Lu, Rui Zhao
doaj   +1 more source

Planck scale effects on the majoron [PDF]

open access: yesPhysics Letters B, 1993
The hypothesis that non-perturbative gravitational effects lead to explicit breaking of global symmetries is considered in the context of Majoron models. We find that the nonvanishing Majoron mass generated by these effects can overclose the universe unless the massive Majoron is unstable. The cosmological mass density constraints can then be satisfied
Akhmedov, E. Kh.   +3 more
openaire   +2 more sources

Scale Effect of Sloping Landscape Characteristics on River Water Quality in the Upper Reaches of the Si River in East-Central China

open access: yesLand, 2023
Landscape composition and configuration determine the source of pollutants. They also determine the interception and pollution-holding potential of the surface landscape.
Fang Liu   +5 more
doaj   +1 more source

Nanofire and scale effects of heat [PDF]

open access: yesNano Convergence, 2019
Combustion is a chemical reaction that emits heat and light. Nanofire is a kind of flameless combustion that occurs on the micro-nano scale. Pt/Al2O3 film with a thickness of 20 nm can be prepared as a catalyst by micro-nano processing. When the methanol-air mixture gas passes through the surface of the catalyst, a chemical reaction begins and a ...
Zhimao Wu   +5 more
openaire   +3 more sources

Spatial Configuration of Urban Greenspace Affects Summer Air Temperature: Diurnal Variations and Scale Effects

open access: yesAtmosphere, 2023
Optimizing the spatial pattern (spatial compositive and spatial configuration) of urban greenspace can effectively alleviate the urban heat island effect. While the relationship between air temperature (AT) and spatial composition of urban greenspace has
Qin Tian   +7 more
doaj   +1 more source

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