Results 11 to 20 of about 172,315 (161)
Effect of diffuse fraction on gross primary productivity and light use efficiency in a warm-temperate mixed plantation [PDF]
Frontiers in Plant Science, 2022 Diffuse radiation (If) is one of important variables determining photosynthetic rate and carbon uptake of forest ecosystems. However, the responses of gross primary productivity (GPP) and light use efficiency (LUE) to diffuse fraction (DF) are still ...
Peirong Liu +6 more
doaj +2 more sources
Adaptive Neuro-Fuzzy Inference System and a Multilayer Perceptron Model Trained with Grey Wolf Optimizer for Predicting Solar Diffuse Fraction [PDF]
Entropy, 2020 The accurate prediction of the solar diffuse fraction (DF), sometimes called the diffuse ratio, is an important topic for solar energy research. In the present study, the current state of Diffuse irradiance research is discussed and then three robust ...
Randall Claywell +4 more
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Mathematical Determination of the Upper and Lower Limits of the Diffuse Fraction at Any Site
Applied Sciences (Switzerland), 2021 A mathematical method for accurately determining the upper and lower diffuse-fraction (kd) limits that divide the sky into clear, intermediate, and overcast is developed. Fourteen sites around the world are selected for demonstrating the methodology. The
Harry Kambezidis, Kambezidis Harry D
exaly +3 more sources
Remote Sensing, 2022 To analyze the hyperspectral reflectance characteristics of rice canopies under changes in diffuse radiation fraction, experiments using different cover materials were performed in Nanjing, China, during 2016 and 2017.
Xiaodong Jiang, Li Yingxue
exaly +3 more sources
Applied Sciences (Switzerland), 2023 The separation models are tools used in solar engineering to estimate direct normal (DNI) and diffuse horizontal (DHI) solar irradiances from measurements of global solar irradiance (GHI).
Eugenia Paulescu +2 more
exaly +3 more sources
Energies, 2017 We present a new model for the calculation of the diffuse fraction of the global solar irradiance for solar system simulations. The importance of an accurate estimation of the horizontal diffuse irradiance is highlighted by findings that an inaccurately ...
GÜNTHER Seckmeyer, Martin Hofmann
exaly +3 more sources
Effects of Topography and Geography on Solar Diffuse Fraction Modeling in Taiwan
AtmosphereA correlation model for the diffuse fraction was recently developed on the basis of a data set obtained in the western part of the Taiwanese mainland. However, it is widely agreed that no existing diffuse fraction correlation model is applicable to all ...
Keh-Chin Chang, Chang Keh-Chin
exaly +3 more sources
Fractional diffusion maps [PDF]
Applied and Computational Harmonic Analysis, 2021 In this paper, we extend the diffusion maps algorithm on a family of heat kernels that are either local (having exponential decay) or nonlocal (having polynomial decay), arising in various applications. For example, these kernels have been used as a regularizer in various supervised learning tasks for denoising images.
Antil, Harbir +2 more
openaire +2 more sources
A Semi-Analytical Model for Separating Diffuse and Direct Solar Radiation Components
Applied Sciences, 2022 The knowledge of the solar irradiation components is required by most solar applications. When only the global horizontal irradiance is measured, this one is typically broken down into its fundamental components, beam and diffuse, by applying an ...
Eugenia Paulescu, Marius Paulescu
doaj +1 more source
Statistical analysis of the solar diffuse fraction radiation using regression analysis of longitudin
Journal of Thermal Engineering, 2023 In this study, the validity of the estimation of a single regression equation for the diffuse frac-tion across 22 stations in India using the two parameters: the clearness index and the sunshine ratio is tested.
Hicham SALHI +2 more
doaj +1 more source