A5068278571- Earthquake Detection and Analysis
- Ionosphere and magnetosphere dynamics
- earthquake and tectonic studies
- Geomagnetism and Paleomagnetism Studies
- Seismic Waves and Analysis
- GNSS positioning and interference
- Radioactivity and Radon Measurements
- Seismology and Earthquake Studies
- Advanced Measurement and Detection Methods
- Anomaly Detection Techniques and Applications
- Tropical and Extratropical Cyclones Research
- Advanced Algorithms and Applications
- Remote Sensing and Land Use
- Image Processing Techniques and Applications
- Advanced Computational Techniques and Applications
- Seismic Imaging and Inversion Techniques
- Urban Heat Island Mitigation
- Advanced Image Fusion Techniques
- Neural Networks and Applications
- Material Properties and Applications
- Remote-Sensing Image Classification
- Noise Effects and Management
- Fire Detection and Safety Systems
- Marine and Coastal Research
- Remote Sensing in Agriculture
National Institute of Biological Sciences, Beijing
2023-2025
National Institute of Hospital Administration
2022-2024
University of Chinese Academy of Sciences
2024
Heilongjiang Earthquake Agency
2023
National University of Defense Technology
2023
China Earthquake Administration
2011-2020
Abstract Earth suffered the attack of strongest geomagnetic storm in last 20 years (Kp = 9, Dst −400 nT) occurred on 11 May 2024. Taking advantage LEO multi‐parameter CSES satellite (launched 2018) with a large inclination angle , joint observations NOAA and GOES, we present comprehensive near‐earth space responses this super report precise high energy particle flux enhancements, electric magnetic field disturbances plasma density changes. A new proton belt fluxes exceeding 2.5–14 MeV at L...
Driven by the objective of earthquake disaster prevention and mitigation, China launched Zhangheng mission to build a stereoscopic monitoring system from lithosphere space. This report briefly presents possible seismic ionospheric disturbances recorded first probe mission, which is known as China-Seismo-Electromagnetic Satellite (CSES). The routine data preprocessing seismo-ionospheric information analysis methods are introduced. that appeared during strong shallow earthquakes (with...
Abstract. The electron density data recorded by the Langmuir Probe Instrument (ISL, Sonde de Langmuir) onboard DEMETER satellite have been collected for nearly 4 yr (during 2006–2009) to perform a statistical analysis. During this time, more than 7000 earthquakes with magnitude larger or equal 5.0 occurred all over world. For studies, these events divided into various categories on basis of seismic information, including Southern Northern Hemisphere earthquakes, inland sea at different...
This study reports the temporal and spatial distributions of extremely/very low frequency (ELF/VLF) wave activities energetic electron fluxes in ionosphere during an intense storm (geomagnetic activity index Dst approximately −174 nT) that occurred on 26 August 2018, based observations by a set detectors onboard China Seismo-Electromagnetic Satellite (CSES). A good correlation ionospheric ELF/VLF with precipitations various evolution phases was revealed. The strongest emissions at broad band...
Abstract For prediction of urban remote sensing surface temperature, cloud, cloud shadow and snow contamination lead to the failure temperature inversion vegetation‐related index calculation. A time series framework under interference is proposed in this paper. This helpful solve problem impact data loss on prediction. Spatial temporal variation trends vegetation are analyzed using Landsat 7/8 2010 2019 from Beijing. The geographically weighed regression (GWR) method used realize simulation...
The China Seismo-Electromagnetic Satellite (CSES) was successfully launched on February 2, 2018, with a plasma analyzer package (PAP) onboard to in-situ detect the ionospheric ion parameters. In this paper, availability of PAP data is investigated for first time through analyzing three typical disturbance events. Firstly, radio and disturbances caused by two high-power terrestrial very low frequency (VLF) transmitters over American NAA station Australian NWC are investigated. Furthermore,...
Abstract This paper reports a large‐scale magnetospheric line radiation (MLR) event during moderate geomagnetic storm on 11 September 2018, which was well recorded by the China‐Seismo‐Electromagnetic Satellite (CSES) in upper ionosphere. The shows symmetrical propagation feature at conjugated locations between two hemispheres, exhibiting large spatial extension roughly from latitudes 54°N to 53°S. parallel structures are visible both electric and magnetic fields frequency band ranging local...
Abstract. CSES (China Seismo-Electromagnetic Satellite) is a newly launched electric-magnetic satellite in China. A GNSS occultation receiver (GOR) installed on the to retrieve electron density related parameters. In order validate radio (RO) data from GOR board CSES, comparison between RO and co-located COSMIC conducted check consistency reliability of using measurements 12 February 2018 31 March 2019. peak values (NmF2), heights (hmF2), profiles (EPDs) are compared with corresponding this...
The ionospheric hiss wave is a broadband incoherent and structureless electromagnetic emission. They appear in relatively narrower frequency range between −0.1 1.5 kHz. However, according to previous observations, abnormal emissions during seismic activities also preferentially the same of hiss. This work studies propagation features time based on observations from CSES (China Seismo-Electromagnetic Satellite). vector analysis shows that activities, except for downward propagating which...
The radio occultation (RO) measurements obtained by GOR payload on board the CSES (the first China Seismo-Electromagnetic Satellite) satellite are validated using observations from five ionosonde stations located at different latitudes and one incoherent scatter radar (ISR) observatory mid-latitude. RO peak values (NmF2) heights (hmF2) compared with corresponding stations, electron density profiles (EDP) ISR measurements. results show that: (1) NmF2 generally very consistent that ionosondes...
Abstract Based on the observations by sun‐synchronous circular orbit China Seismo‐Electromagnetic Satellite(CSES), a typical case of rising‐tone quasiperiodic (QP) emissions with large period around 2 min was reported to appear dayside 23 October 2021. The frequency QP waves ranges from 2,000 ∼ 3,000 Hz and wave spectral structure consists four elements right‐handed polarization. Three them are located at extremely low L‐shells 3.5. periodic precipitating fluxes 100 400 keV electrons were...
On May 21, a Ms6.4 earthquake occurred in Yangbi, Yunnan Province. Less than 5 h later, on follows Ms7.4 Madoi, Qinghai In this study, multiple parameters are studied from CSES-01 satellite and GNSS. The include the electron density LAP, energetic particle flux HEPP, electric field spectrum EFD, induced magnetic SCM, global TEC ground-based GNSS receivers. time scale, all changed 15, 17 18. relative amplitude of Ne is more 200%. space clear enhancement focus southeast epicenter Qinghai,...
Abstract. Many studies have revealed the stratification phenomenon of topside ionospheric F2 layer using ground-based or satellite-based ionograms, which can show direct signs this phenomenon. However, it is difficult to identify in situ electron density data. Therefore, a statistical method, shuffle resampling skill, adopted paper. For first time, data, recorded by same Langmuir probe aboard DEMETER (Detection Electro-Magnetic Emission Transmitted from Earthquake Regions) satellite at...
The nighttime winter anomaly (NWA) phenomenon is studied using the in situ electron density measurements from CSES (China Seismo-Electronmagnetic Satellite) satellite orbiting above F2 layer peak height (hmF2) region. Observations present study indicates that: (1) NWA can appear at mid-latitudes large longitude ranges hmF2 region during low solar activity period, with most obvious part being located American sector northern time and Asian southern as mention previous studies. (2) also...
Driven by the scientific objective of geophysical field detection and natural hazard monitoring from space, China launched an electromagnetic satellite, which is known as Seismo-Electromagnetic Satellite (CSES-01), on 2 February 2018, into a circular sun-synchronous orbit with altitude about 507 km in ionosphere. The CSES-01 has been for over 6 years, successfully exceeding its designed 5-year lifespan, will continually operate long possible. A second identical successor (CSES-02) be...
The ionospheric quasi-periodic wave is a type of typical and common electromagnetic phenomenon occurring in extremely low-frequency (ELF) very ranges (VLF). These emissions propagate distinct whistler-wave mode, with varying periodic modulations the intensity over time scales from several seconds to few minutes. We developed an automatic detection model for QP waves ELF band recorded by China Seismo-Electromagnetic Satellite. Based on 827 events, which were collected through visual screening...
This project proposes an improved YOLOv5 detection algorithm Upgraded. To address this issue, the study called YOLOv5-Upgraded.The model takes into account vector angle between predicted edge and real edge, The replaces loss function CIoU (Complete IoU) with SIoU (Scylla IoU); at same time, in order to avoid phenomena such as gradient disappearance, explosion, neuron necrosis during network training, activation SiLU (Sigmoid-weighted Linear Unit) is replaced Mish better flow; CA attention...
Abstract. The stratification phenomenon is investigated using the simultaneous in situ plasma density measurements obtained by Swarm satellites orbiting at different altitudes above F2 peak. For first time, continuous distribution morphology and exact locations are for nighttime stratification, which show that events centered EIA (equatorial ionization anomaly) trough extend towards two crests, with most significant part being located trough. Another new discovery southern mid-latitudes;...
Abstract The equatorial post-midnight irregularities, which has been less studied, are investigated using the in situ electron density (Ne) measurements from 2019 to 2021 obtained by China Seismo-Electromagnetic Satellite (CSES) orbiting topside ionosphere. Some results as following. (1) irregularities distributed along dip equator with a longitude variation pattern of wavenumber 4 and seasonal summer-winter peaks during low solar activity (LSA) period (2) is consistent that background Ne...
From August to October 2018, a series of strong earthquake (EQ) events occurred in southeast Asia and northern Oceania (22°S 0°N, 115°E 170°E) within 50 days. In this paper, we analyze the features ionospheric plasma perturbations, recorded by Plasma Analyzer Package (PAP) Langmuir probe (LAP) onboard China Seismo-Electromagnetic Satellite (CSES-01), before four EQs with magnitudes Ms 6.9 7.4. The ion parameters such as oxygen density (No+), drift velocity vertical direction (Vz) under...
Feature selection of very high-resolution (VHR) images is a key prerequisite for supervised classification. However, it always difficult to acquire the features which have highest correlation type land cover improving classification accuracy. To address this problem, paper proposed methodology feature using results multiple segmentation via genetic algorithm (GA) and (CFS) integrating sparse auto-encoder (SAE). Firstly, 61 features, including spectral spatial are extracted from multi-scale...