• Aucun résultat trouvé

spectral irradiance

Modeling the solar spectral irradiance

Modeling the solar spectral irradiance

... Reconstructed spectral irradiance and variability predictions have a certain consistency at the 5% ...Furthermore, spectral features generated by a model and not generated by the other models are ...

3

Recent variability of the solar spectral irradiance by using SOLAR/SOLSPEC data

Recent variability of the solar spectral irradiance by using SOLAR/SOLSPEC data

... solar spectral irradiance by using SOLAR/SOLSPEC data Mustapha Meftah (1), Luc Damé (1), Alain Hauchecorne (1), Abdanour Irbah (1), Slimane Bekki (1), David Bolsée (2), Nuno Pereira (2), Dominique Sluse ...

1

Recent variability of the solar spectral irradiance and its impact on climate modelling

Recent variability of the solar spectral irradiance and its impact on climate modelling

... These discrepancies with prior cycle observations and with SSI models have inspired new analyses and collaborations aimed at a better understanding of the potential sources of instrument degradation that might have ...

34

Reconstruction of the solar spectral UV irradiance for nowcasting of the middle atmosphere state on the basis of LYRA measurements

Reconstruction of the solar spectral UV irradiance for nowcasting of the middle atmosphere state on the basis of LYRA measurements

... solar irradiance at the Lyman- alpha ...solar irradiance for the wide spectral range (120–680 nm) we have developed the statistical tool for the reconstruction of the full spectrum from the LYRA ...

10

Assessment of Several Empirical Relationships for Deriving Daily Means of UV-A Irradiance from Meteosat-Based Estimates of the Total Irradiance

Assessment of Several Empirical Relationships for Deriving Daily Means of UV-A Irradiance from Meteosat-Based Estimates of the Total Irradiance

... UV irradiance derived from the space-borne Ozone Monitoring Instruments (OMI) are available from NASA, though emphasis is put on erythemal UV and the UV ...the spectral irradiance products at 324 and ...

18

Estimating solar ultraviolet irradiance (290-385 nm) by means of the spectral parametric models: SPCTRAL2 and SMARTS2

Estimating solar ultraviolet irradiance (290-385 nm) by means of the spectral parametric models: SPCTRAL2 and SMARTS2

... and spectral UV radiation in the environ- ment and the biological e€ects and heath risks that may take place in the near ...solar irradiance at surface level by addition of its direct beam and di€use ...

9

Influence of spectral solar irradiance on the formation of new particles in the continental boundary layer

Influence of spectral solar irradiance on the formation of new particles in the continental boundary layer

... March (blue curves) behave in the opposite way with a decrease of spectral irradiance at wavelengths below 340 nm. The right hand side of all the curves are more bunched and mixed than the left side with a ...

35

l1-spectral clustering algorithm: a robust spectral clustering using Lasso regularization

l1-spectral clustering algorithm: a robust spectral clustering using Lasso regularization

... Self-Tuning Spectral Clustering from Zelnik-Manor and Perona (2005), available on GitHub as a Python code at ...the spectral clustering, in which the final postprocessing step (k-means) is removed and the ...

24

Towards spectral mathematical morphology

Towards spectral mathematical morphology

... Image analysis can be regarded as the first level of a complete image processing chain. At this low level of processing, measures can be managed and process quality and accuracy can be evaluated. Image analysis itself ...

313

Spectral Detection on Sparse Hypergraphs

Spectral Detection on Sparse Hypergraphs

... [6]. Spectral methods have the great advantage of being non-parametric, meaning that they do not require any knowledge of the generative model (if one exists) and are completely independent of ...standard ...

9

Attosecond spectral shearing interferometry

Attosecond spectral shearing interferometry

... If the x-ray field consists of two identical pulses, centered at t t0 and t t0 , and short compared to the laser period, the laser field induces a well-defined energy shift W Wt0 [r] ...

5

Day-ahead probabilistic forecast of solar irradiance: a Stochastic Differential Equation approach

Day-ahead probabilistic forecast of solar irradiance: a Stochastic Differential Equation approach

... Deterministic and probabilistic forecasts. In the deterministic forecast of day- ahead solar irradiance, NWP models are widely used, and the model value goes through Model Output Statistics (MOS) before the actual ...

22

Revisiting the spectral analysis for high-order spectral discontinuous methods

Revisiting the spectral analysis for high-order spectral discontinuous methods

... the Spectral Volume – SV – approach [13–17] , a polynomial reconstruction is defined inside any cell using the averaged quantities over sub-cells built by subdivision of the initial mesh ...collocated ...

25

Power Spectral Clustering

Power Spectral Clustering

... expensive spectral clus- tering near the borders of the ...of spectral clustering. We obtain a faster version of spectral clustering while preserving the properties of spectral clustering, ...

20

Spectral Determinants on Mandelstam Diagrams

Spectral Determinants on Mandelstam Diagrams

... 4, three poles with negative residues, one pole with positive residue. From now on we refer to the coordinates (1.1) as moduli. The goal of the present paper is to study the regularized determinant of the Laplacian on a ...

35

Satellite solar meteorology: operational use of the Meteosat system to compute solar irradiance

Satellite solar meteorology: operational use of the Meteosat system to compute solar irradiance

... L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d’enseignemen[r] ...

3

Trou spectral d’un processus d’exclusion

Trou spectral d’un processus d’exclusion

... Conclusion et perpectives Généralement, le calcul du spectral gap est di¢ cile, des fois impossible à calculer. Les auteurs qui travaillent sur ce sujet procèdent par des estimations précises à l’aide de ...

86

NO2 and HCHO photolysis frequencies from irradiance measurements in Thessaloniki, Greece

NO<sub>2</sub> and HCHO photolysis frequencies from irradiance measurements in Thessaloniki, Greece

... Print Version Interactive Discussion EGU considerably, especially as mentioned before for large solar zenith angles and reaches 0.107. This means that the average values of J (NO 2 ) can still be reproduced, but greater ...

29

Dynamic annual daylight simulations based on one-hour and one-minute means of irradiance data

Dynamic annual daylight simulations based on one-hour and one-minute means of irradiance data

... - Further simulations have confirmed that this high quality could be maintained for other office geometries w ith smaller facade apertures, room depth up to 10 m and varying facade orientations. There is a tendency tow ...

21

L'effet du frottement dans un modele spectral de l'atmosphere

L'effet du frottement dans un modele spectral de l'atmosphere

... Variation du développement de la dépression DI,selon différentes positions de la discon- tinuité latitudinale du champ Cd'... Courbe de l'intégrale du vent vertical [r] ...

153

Show all 884 documents...

Sujets connexes