NSTL国家科技图书文献中心

1. On the correlation between hemispheric solar activity and geomagnetic indices: A study utilizing wavelet analysis technique NSTL国家科技图书文献中心

El-Taher, A. M. | Habashy, B. M.... - 《Advances in Space Research》 - 2025,75(8) - 6522～6542 - 共21页

摘要： indicate an asymmetrical distribution of solar activity | in the sunspot activity predominance in each solar | hemisphere across the various phases of the solar activity | southern hemisphere of the Sun has more solar activity | geomagnetic indices* have been divided into northern and*

关键词： Hemispheric solar activityDst | Solar activity cycle | Geomagnetic indices | Wavelet analysis

2. Simultaneous evaluation of solar activity proxies during geomagnetic storms using principal component analysis: Case study of the African low and mid-latitude regions NSTL国家科技图书文献中心

Jean Claude Uwamahor... | John Bosco Habarulem...... - 《Journal of atmospheric and solar-terrestrial physics》 - 2025,270 - 共11页

摘要： of the mostly used solar* activity indices to the* | terms of the corresponding solar* activity index and* | using SSN as solar* activity representation, a* | analysis (PCA). The selected indices* are the sunspot* | number (SSN), solar* radio flux at a wavelength of 10.7*

关键词： Solar activity indices | Geomagnetic storms | Total electron content | Principal component analysis

3. Assessing the role of space weather indices in the prediction of total electron content at different latitudes during geomagnetic storms NSTL国家科技图书文献中心

Xu, Fei | Yue, Dongjie ... - 《Astrophysics and space science》 - 2025,370(3) - 共12页

摘要： of different solar* activity indices and geomagnetic* | indices in TEC prediction remains unclear. The Long | , Dst, and AE indices, on the prediction results at | and F10.7 indices* performed best, with a 51.3* | any additional indices. The best model is one that

关键词： LSTM network | Ionospheric TEC | Geomagnetic storm | Space weather indices

4. Dst index estimation from cosmic ray and solar wind data during solar cycle 24 using artificial neural networks NSTL国家科技图书文献中心

Sabeha, Hadeer F. | Hassanin, Alshaimaa ... - 《Journal of atmospheric and solar-terrestrial physics》 - 2025,269 - 共12页

摘要： (Dst) index using cosmic ray (CR) and solar* wind (SW* | ) data from solar* cycle 24. A dataset of 1361 events* | different conditions during solar* cycle 23. The CR* | parameters, SW parameters, and geomagnetic indices* were* | interactions between solar* and cosmic-ray phenomena and their*

关键词： Geomagnetic storms | Artificial neural networks (ANN) | Dst prediction | Cosmic rays | Solar wind | Forbush decrease events | Magnetosphere

5. Multifractal detrended cross-correlation coefficient for cosmic ray and sunspot time series NSTL国家科技图书文献中心

Sierra-Porta, D. - 《Journal of atmospheric and solar-terrestrial physics》 - 2025,266 - 共8页

摘要： solar activity are critical components of space | between cosmic rays and solar* activity, which are often* | heliophysical variables such as solar* wind conditions* | , interplanetary magnetic field data, and indices* of coronal mass* | ejections or solar* flares, future research can construct*

关键词： Multifractal detrended cross-correlation | analysis | Cosmic ray intensity | Sunspot numbers | Time lag analysis | Space weather dynamics

6. Energetic Electron Precipitation From the Radiation Belts: Geomagnetic and Solar Wind Proxies for Precipitation Flux Magnitudes NSTL国家科技图书文献中心

Crack, Malcolm | Rodger, Craig J.... - 《Journal of Geophysical Research,A.Space Physics》 - 2025,130(3) - n/a～n/a - 共16页

摘要： variety of geomagnetic and solar* wind proxies to* | was undertaken using indices* at their fundamental* | connection to substorm activity. The identification of the | a solar* forcing factor in the Coupled Model* | Previously the geomagnetic Ap index has been

关键词： electron precipitation | radiation belts | DEMETER satellite | POES satellite | SAMPEX satellite | geomagnetic indices

7. Unveiling significant changes in optical, magnetic, and visible-light photocatalytic performance of CuFe_2O_4 nanocompositions through chelating agent modulation NSTL国家科技图书文献中心

Mohammed Ahmed Wahba - 《CERAMICS INTERNATIONAL》 - 2025,51(4) - 4329～4342 - 共14页

摘要： the suitability of these ferrite powders for solar | refractive indices. Among the samples, GCF exhibited the | nanoparticles. The photocatalytic activity* of CuFe_2O_4* | of congo red dye under solar* irradiation. GCF* | This study presents a comprehensive

关键词： sol-gel-auto-combustion | CuFe_2O | Glycine | Tartaric | Succinic | Optical | Coercivity | Photocatalytic

8. EMISSA (Exploring millimetre indicators of solar-stellar activity) III. Comparison of Ca II indices and millimetre continua in a 3D model atmosphere NSTL国家科技图书文献中心

Pandit, Sneha | Wedemeyer, Sven ... - 《Astronomy and astrophysics》 - 2024,687 - ARTN A151～ - 共17页

摘要： to establish more robust solar/stellar activity | patches separately. The activity* indices generated from* | wavelengths (0.3 mm-8.5 mm) and the Ca II activity indices | . The Ca II activity* indices and mm brightness* | different regions of the solar* atmosphere. Furthermore*

关键词： line: formation | line: profiles | radiative transfer | methods: numerical | Sun: activity | Sun: chromosphere | MULTILEVEL RADIATIVE-TRANSFER | ALPHA-CENTAURI BINARY | K-EMISSION | CHROMOSPHERIC ACTIVITY...

9. Dependence of long-term trends in foF2 at middle latitudes on different solar activity proxies NSTL国家科技图书文献中心

Lastovicka, Jan - 《Advances in Space Research: The Official Journal of the Committee on Space Research(COSPAR)》 - 2024,73(1) - 685～689 - 共5页 - 被引量：9

摘要： available, so various solar activity proxies (solar | activity indices) must be used. The aim of this paper is | best solar activity* proxy for foF2 trends at middle* | six solar* activity proxies show that the long-term* | activity proxy used, and the only solar proxy, which

关键词： Ionosphere | Long-term trends | Solar activity proxies | INDEXES

10. A comparative study of solar activity parameters during the period 2009-2012 and 2020-2023 (ascending phase of solar cycles 24 and 25) NSTL国家科技图书文献中心

Singh, P. R. | Kushwaha, Upendra Kr... - 《Astrophysics and space science》 - 2024,369(8) - ARTN 78～ - 共13页 - 被引量：1

摘要： index is a good indicator of solar activity indices | selected solar* activity parameters: sunspot number (SSN* | -correlation and time lag for solar* activity parameters (SSN* | In this paper, we performed solar* synodic* | ), sunspot area (SSA), modified coronal index (MCI), solar

关键词： Sunspot number and area | Solar radio flux | Modified coronal index | Mg II index | Galactic cosmic rays | GALACTIC COSMIC-RAYS | HELIOSPHERIC MODULATION | FLARE INDEX | PERIODICITIES | INTENSITY...

摘要： indicate an asymmetrical distribution of solar activity | in the sunspot activity predominance in each solar | hemisphere across the various phases of the solar activity | southern hemisphere of the Sun has more solar activity | geomagnetic indices have been divided into northern and

关键词： Hemispheric solar activityDst | Solar activity cycle | Geomagnetic indices | Wavelet analysis

摘要： of the mostly used solar activity indices to the | terms of the corresponding solar activity index and | using SSN as solar activity representation, a | analysis (PCA). The selected indices are the sunspot | number (SSN), solar radio flux at a wavelength of 10.7

关键词： Solar activity indices | Geomagnetic storms | Total electron content | Principal component analysis

摘要： of different solar activity indices and geomagnetic | indices in TEC prediction remains unclear. The Long | , Dst, and AE indices, on the prediction results at | and F10.7 indices performed best, with a 51.3 | any additional indices. The best model is one that

关键词： LSTM network | Ionospheric TEC | Geomagnetic storm | Space weather indices

摘要： (Dst) index using cosmic ray (CR) and solar wind (SW | ) data from solar cycle 24. A dataset of 1361 events | different conditions during solar cycle 23. The CR | parameters, SW parameters, and geomagnetic indices were | interactions between solar and cosmic-ray phenomena and their

关键词： Geomagnetic storms | Artificial neural networks (ANN) | Dst prediction | Cosmic rays | Solar wind | Forbush decrease events | Magnetosphere

摘要： solar activity are critical components of space | between cosmic rays and solar activity, which are often | heliophysical variables such as solar wind conditions | , interplanetary magnetic field data, and indices of coronal mass | ejections or solar flares, future research can construct

关键词： Multifractal detrended cross-correlation | analysis | Cosmic ray intensity | Sunspot numbers | Time lag analysis | Space weather dynamics

摘要： variety of geomagnetic and solar wind proxies to | was undertaken using indices at their fundamental | connection to substorm activity. The identification of the | a solar forcing factor in the Coupled Model | Previously the geomagnetic Ap index has been

关键词： electron precipitation | radiation belts | DEMETER satellite | POES satellite | SAMPEX satellite | geomagnetic indices

摘要： the suitability of these ferrite powders for solar | refractive indices. Among the samples, GCF exhibited the | nanoparticles. The photocatalytic activity of CuFe_2O_4 | of congo red dye under solar irradiation. GCF | This study presents a comprehensive

关键词： sol-gel-auto-combustion | CuFe_2O | Glycine | Tartaric | Succinic | Optical | Coercivity | Photocatalytic

摘要： to establish more robust solar/stellar activity | patches separately. The activity indices generated from | wavelengths (0.3 mm-8.5 mm) and the Ca II activity indices | . The Ca II activity indices and mm brightness | different regions of the solar atmosphere. Furthermore

关键词： line: formation | line: profiles | radiative transfer | methods: numerical | Sun: activity | Sun: chromosphere | MULTILEVEL RADIATIVE-TRANSFER | ALPHA-CENTAURI BINARY | K-EMISSION | CHROMOSPHERIC ACTIVITY...

摘要： available, so various solar activity proxies (solar | activity indices) must be used. The aim of this paper is | best solar activity proxy for foF2 trends at middle | six solar activity proxies show that the long-term | activity proxy used, and the only solar proxy, which

关键词： Ionosphere | Long-term trends | Solar activity proxies | INDEXES

摘要： index is a good indicator of solar activity indices | selected solar activity parameters: sunspot number (SSN | -correlation and time lag for solar activity parameters (SSN | In this paper, we performed solar synodic | ), sunspot area (SSA), modified coronal index (MCI), solar

关键词： Sunspot number and area | Solar radio flux | Modified coronal index | Mg II index | Galactic cosmic rays | GALACTIC COSMIC-RAYS | HELIOSPHERIC MODULATION | FLARE INDEX | PERIODICITIES | INTENSITY...

4008-161-200 800-990-8900

国家科技图书文献中心

摘要： indicate an asymmetrical distribution of solar activity | in the sunspot activity predominance in each solar | hemisphere across the various phases of the solar activity | southern hemisphere of the Sun has more solar activity | geomagnetic indices* have been divided into northern and*

摘要： of the mostly used solar* activity indices to the* | terms of the corresponding solar* activity index and* | using SSN as solar* activity representation, a* | analysis (PCA). The selected indices* are the sunspot* | number (SSN), solar* radio flux at a wavelength of 10.7*

摘要： of different solar* activity indices and geomagnetic* | indices in TEC prediction remains unclear. The Long | , Dst, and AE indices, on the prediction results at | and F10.7 indices* performed best, with a 51.3* | any additional indices. The best model is one that

摘要： variety of geomagnetic and solar* wind proxies to* | was undertaken using indices* at their fundamental* | connection to substorm activity. The identification of the | a solar* forcing factor in the Coupled Model* | Previously the geomagnetic Ap index has been

摘要： the suitability of these ferrite powders for solar | refractive indices. Among the samples, GCF exhibited the | nanoparticles. The photocatalytic activity* of CuFe_2O_4* | of congo red dye under solar* irradiation. GCF* | This study presents a comprehensive

摘要： to establish more robust solar/stellar activity | patches separately. The activity* indices generated from* | wavelengths (0.3 mm-8.5 mm) and the Ca II activity indices | . The Ca II activity* indices and mm brightness* | different regions of the solar* atmosphere. Furthermore*

摘要： available, so various solar activity proxies (solar | activity indices) must be used. The aim of this paper is | best solar activity* proxy for foF2 trends at middle* | six solar* activity proxies show that the long-term* | activity proxy used, and the only solar proxy, which

摘要： index is a good indicator of solar activity indices | selected solar* activity parameters: sunspot number (SSN* | -correlation and time lag for solar* activity parameters (SSN* | In this paper, we performed solar* synodic* | ), sunspot area (SSA), modified coronal index (MCI), solar