A5062845059- Ionosphere and magnetosphere dynamics
- Earthquake Detection and Analysis
- Solar and Space Plasma Dynamics
- GNSS positioning and interference
- Geophysics and Gravity Measurements
- Geomagnetism and Paleomagnetism Studies
- Laser Material Processing Techniques
- earthquake and tectonic studies
- Atmospheric Ozone and Climate
- Laser-Ablation Synthesis of Nanoparticles
- Laser-induced spectroscopy and plasma
- Seismic Waves and Analysis
- Astro and Planetary Science
- Surface Roughness and Optical Measurements
- HIV Research and Treatment
- Ocular and Laser Science Research
- Liver Disease Diagnosis and Treatment
- Inertial Sensor and Navigation
- High-Temperature Coating Behaviors
- Advanced Surface Polishing Techniques
- Fusion materials and technologies
- Meteorological Phenomena and Simulations
- Coronary Interventions and Diagnostics
- Geological and Geophysical Studies
- Ocean Waves and Remote Sensing
Peking University
2016-2025
Harbin Institute of Technology
2021-2024
Chinese People's Liberation Army
2022
Chinese PLA General Hospital
2022
Chinese Academy of Sciences
2002-2020
Institute of Plasma Physics
2020
Shanghai Jiao Tong University
2017
Ruijin Hospital
2009-2017
Henan Agricultural University
2017
Chinese Academy of Meteorological Sciences
2012-2013
A global ionospheric total electron content (TEC) model based on the empirical orthogonal function (EOF) analysis method is constructed using ionosphere maps provided by Jet Propulsion Laboratory during years 1999–2009. The importance of different types variation to overall TEC variability as well influence solar radiation and geomagnetic activity toward can be represented characteristics EOF base functions E k associated coefficients P . quick convergence decomposition makes it possible use...
Liquid-assisted pulsed laser cleaning is achieved by coating kerosene on titanium alloy oxide film, and the surface was processed to form micro- nanostructured amorphous-nanocrystalline phases oxidized layer after cleaning. The morphology acquired changing fluence (F) spot overlap ratio (Ux = Uy) with field emission scanning electron microscopy (FE-SEM) atomic force (AFM). composition change analyzed X-ray photoelectron spectroscopy (XPS). transmission (TEM) used analyze sample section....
Abstract Previous studies suggest that the planetary waves in mesosphere and low thermosphere (MLT) could modulate occurrence of equatorial plasma bubbles (EPBs) via altering post‐sunset F layer height. Using simultaneous observations by Global Navigation Satellite System receiver networks, two ionosondes separated about 10° longitude, high frequency very radars, we investigated day‐to‐day variations height EPB southeast Asia during quasi‐2‐day wave (QTDW) event July 2023. The results showed...
In this study, the morphology and climatology of nighttime periodic disturbances associated with MSTIDs are investigated over entire China sector from January 2014 to August 2017, using data global navigation satellite systems (GNSS) receivers. Firstly, a comparative case analysis propagation characteristics reveals complexity day-to-day variations MSTID activity. The main statistical findings indicate that these predominantly occur during summer months, higher occurrence rate solar minimum....
The thermospheric densities derived by CHAMP/STAR accelerometer within the time period from 01 May 2001 to 31 December 2007 are utilized investigate hemispheric asymmetry in response strong storm driving conditions. geomagnetic storms of 03–07 April 2004 first studied since occurred close vernal equinox, allowing seasonal be eliminated greatest extent. averaged density enhancements southern polar region were much larger than that northern region. comparisons versus Dst and Ap index indicate...
Abstract In this paper, we report the evolution (generation, amplification, and dissipation) of optically observed mesoscale field‐aligned irregularity structures (FAIs) (~150 km) associated with a medium‐scale traveling ionospheric disturbance (MSTID) event. There have not been observations FAIs airglow before. The were generated in an airglow‐depleted front southwestward propagating MSTIDs that simultaneously by all‐sky imager, GPS monitor, digisonde around Xinglong (40.4°N, 30.5° magnetic...
Abstract In situ electron density measurements by the CHAllenging Minisatellite Payload and Defense Meteorological Satellites Program F17 satellites show that midlatitude ionization at altitudes of ∼350 850 km is enhanced in late evening. The enhancements increase to maximum around midnight are clearly observed till early morning as equatorial decays minimal level. They appear winter hemisphere during June December solstices both hemispheres equinox. well confined between ±30° ±50° magnetic...
Abstract The ionosphere exhibits complex variations due to the influences from above and below. To distinguish source of ionospheric disturbances is important for understanding variation process coupling mechanism among different regions. Using total electron content (TEC) derived Global Navigation Satellite System observations, during super typhoon Hato in 2017 that was accompanied by a weak geomagnetic storm are revisited, including deviation traveling (TIDs). It found TEC low‐latitude...
In this paper, the total electron content (TEC) of Global Ionosphere Maps (GIMs) is normalized and employed to study seismo-ionospheric anomalies at time 12 May 2008 M 8.0 Wenchuan Earthquake. The space weather conditions are taken into account. It found that remarkable reductions appear locally around epicentre their conjugate points during daytime 29 April 6–10 2008. A global a strict criterion applied detect anomalies. Results show on 6 7 2008, which respectively days 13, 5 before,...
Abstract Using the ionospheric total electron content (TEC) and location of equatorial ionization anomaly (EIA) crest derived from GPS data observed at Nanning (22.84°N, 108.33°E, dip latitude ~ 12.14°N), China, a station situated near daytime EIA region, local time, seasonal, solar cycle variations crests 2006 to 2015 was investigated. The TEC magnetic (MLAT) experience an ascendant descendant process with evolution crest. Also, this diurnal variation depends on season cycle. MLAT is...
Abstract. This study presents a comprehensive observation of the large-scale traveling ionospheric disturbances (LSTIDs) in eastern Asian sector during 2015 St. Patrick's Day (17 March 2015) geomagnetic storm. For first time, three dense networks GPS receivers China and Japan are combined together to obtain two-dimensional (2-D) vertical total electron content (VTEC) perturbation maps wider longitudinal range than previous studies this region. Results show that an LSTID spanning at least 60∘...
Summary. A recent genome‐wide association study discovered that two polymorphisms, interferon (IFN) alpha receptor 2 (IFNAR‐2) F8S and interleukin 10 (IL10RB) K47E, were associated with susceptibility to hepatitis B virus (HBV) infection in Africa. Here, we reevaluate the effects of polymorphisms on HBV Chinese Han population, extended look at their IFN response chronic (CHB). We included 341 patients CHB unrelated controls presenting asymptotic self‐limited infection, who well matched age...
Several noninvasive blood biomarkers have been established for the assessment of liver fibrosis in patients with chronic hepatitis B virus (HBV) infection, but their clinical performance remains inconclusive. Here, we compared diagnostic these and developed a novel algorithm assessing fibrosis. Six hundred sixteen chronically HBV-infected treatment-naïve who underwent biopsy were enrolled randomly divided into training (N=410) internal validation cohorts (N=206). One fifty-nine from another...
Abstract Using the Millstone Hill incoherent scatter radar observations during 2015 St. Patrick's Day storm, subauroral polarization streams (SAPSs) have been specified in nonhydrostatic Global Ionosphere‐Thermosphere Model simulations. The results reveal that effect of SAPS on coupled thermosphere‐ionosphere system includes following: (1) Sudden frictional heating acoustic‐gravity waves thermosphere. vertical oscillation is localized, while meridional disturbance propagates poleward and...
Abstract Variations of the low‐latitude ionosphere in eastern Asian sector during 2017 sudden stratospheric warming (SSW) were studied with multi‐instrumental observations that correspond to different altitudes. Specifically, variations topside as high over 830 km investigated data from Swarm B satellite (~500 km), Defense Meteorological Satellite Program F15 (~830 and Operational satellite‐A km). The main results are follows. (1) Simultaneous detected ionospheric parameters E region around...
Abstract The characteristics of winter nighttime enhancement (WNE) the midlatitude ionosphere at 300, 550, and 750 km altitude are presented, based on radio occultation data from Constellation Observing System for Meteorology, Ionosphere, Climate. WNE has earlier start time larger increasing rate than that 550 km, possibly due to downward plasma diffusion above dominates most upper part ionosphere. Theoretical calculation transport 300 reveals largest effect 45° geomagnetic latitude,...