A5068724865- Solar and Space Plasma Dynamics
- Ionosphere and magnetosphere dynamics
- Radio Astronomy Observations and Technology
- Geomagnetism and Paleomagnetism Studies
- Geophysics and Gravity Measurements
- Astro and Planetary Science
- Stellar, planetary, and galactic studies
- Gamma-ray bursts and supernovae
- Astrophysics and Cosmic Phenomena
- Solar Radiation and Photovoltaics
- Antenna Design and Optimization
- Earthquake Detection and Analysis
- Satellite Communication Systems
- Radio Wave Propagation Studies
- Computational Physics and Python Applications
- Magnetic confinement fusion research
- Astronomical Observations and Instrumentation
- Pulsars and Gravitational Waves Research
- Spacecraft Design and Technology
- Image and Signal Denoising Methods
- Advanced Image Processing Techniques
- Image Enhancement Techniques
- Antenna Design and Analysis
- Adaptive optics and wavefront sensing
- Space exploration and regulation
Chinese Academy of Sciences
2016-2025
National Space Science Center
2019-2025
Chinese Academy of Meteorological Sciences
2023-2025
Shanxi Agricultural University
2025
Ministry of Ecology and Environment
2025
National Astronomical Observatories
2015-2024
University of Chinese Academy of Sciences
2016-2024
Nanjing University of Posts and Telecommunications
2024
South China Normal University
2024
Northwest A&F University
2024
Abstract The Advanced Space-based Solar Observatory (ASO-S) is a mission proposed for the 25th solar maximum by Chinese community. scientific objectives are to study relationships between magnetic field, flares and coronal mass ejections (CMEs). Three payloads deployed: Full-disk vector MagnetoGraph (FMG), Lyman- α Telescope (LST) Hard X-ray Imager (HXI). ASO-S will perform first simultaneous observations of photospheric non-thermal imaging flares, initiation early propagation CMEs on single...
Abstract Pulsar polarization profiles form a very basic database for understanding the emission processes in pulsar magnetosphere. After careful calibration of 19-beam L -band receiver and verification beam-offset observation results, we obtain 682 pulsars from observations by Five-hundred-meter Aperture Spherical radio Telescope (FAST) during Galactic Plane Snapshot survey other normal FAST projects. Among them, about 460 are observed first time. The exhibit diverse features. Some have...
Aiming to assess the progress and current challenges on formidable problem of prediction solar energetic events since COSPAR/ International Living With a Star (ILWS) Roadmap paper Schrijver et al. (2015), we attempt an overview status global research efforts. By refer flares, coronal mass ejections (CMEs), particle (SEP) events. The emphasis, therefore, is methods flares eruptions, as well their associated SEP manifestations. This work complements COSPAR Space Weather Action Teams (ISWAT)...
Ionosphere is an important space environment near the earth. Its disturbance would result in severe propagation effects to radio information system, thus causing bad influences on communication, navigation, radar and so on. The total electron content (TEC) parameter present of ionosphere, TEC forecast very meaningful scientific research field. In this paper, we propose a long short-term memory (LSTM) based model predict ionospheric vertical Beijing. input our time sequence consisting vector...
This paper presents an overview of results obtained during the CAWSES-II period on short-term variability Sun and how it affects near-Earth space environment. was planned to examine behavior solar-terrestrial system as solar activity climbed its maximum phase in cycle 24. After a deep minimum following 23, very weak terms sunspot number 24 (MiniMax24), so many presented here refer this comparison with 23. The that has immediate consequence Earth geospace manifests eruptions from closed-field...
Haze caused by atmospheric scattering and absorption would severely affect scene visibility of an image. Thus, image dehazing for haze removal has been widely studied in the literature. Within a hazy image, is not confined small local patch/position, while diffusing whole Under this circumstance, global context crucial factor success dehazing, which was seldom investigated existing algorithms. In literature, (GC) block designed to learn point-wise long-range dependencies modeling; however,...
In this paper, we propose a novel no-reference image quality assessment method for the retargeted based on pairwise rank learning approach. Each needs to be first represented as feature vector, which not only captures characteristics but also is sensitive distortions during retargeting process. As such, investigate and examine different representations their abilities depicting perceptual of image. Based representations, resort approach discriminate between pairs. Experimental results...
Abstract Quasi-periodic pulsations (QPPs) are frequently observed in solar flares, which may reveal some essential characteristics of both thermal and nonthermal energy releases. This work presents multi-wavelength imaging observations an M8.7 flare active region AR 12242 on 2014 December 17. We found that there were three different QPPs: UV QPPs with a period about 4 minutes at 1600 Å images near the center lasting from preflare phase to impulsive phase; EUV 3 along circular ribbon during...
The Chinese Spectral Radioheliograph (CSRH) covering 400 MHz-15 GHz frequency range was constructed during 2009–2016 in Mingantu Observing Station, National Astronomical Observatories, Academy of Sciences at Zhengxiangbaiqi, Inner Mongolia China. CSRH is renamed as M ingant U S p E ctral R adioheliograph (MUSER) after its accomplishment. Currently, MUSER consists two arrays spreading over three spiral-shaped arms. maximum baseline length ∼3 km both east-west and north-south directions. array...
In the reconstructed nonlinear force-free magnetic field of NOAA Active Region 9077 before X5.7/3B (10:24 UT) flare on 2000 July 14, we reveal for first time presence a rope from extrapolation three-dimensional structure. This is located in space above neutral lines filament. The calculated rotate around its axis more than three turns. Overlying are multilayer arcades with different orientations. These agreement Transition and Coronal Explorer observations. estimated free energy this system...
Road detection is a crucial part of autonomous driving system. Most the methods proposed nowadays only achieve reliable results in relatively clean environments. In this paper, we combine edge with road area extraction to solve problem. Our method works well even on noisy campus whose boundaries are blurred sidewalks and surface often covered unbalanced sunlight. First, segmentation done segments which belong chosen merged. Second, use Hough transform voting get vanishing point. Then,...
In practice, images are distorted by more than one distortion. For image quality assessment (IQA), existing machine learning (ML)-based methods generally establish a unified model for all the distortion types, or each is trained independently type, which therefore aware. distortion-aware methods, common features among different distortions not exploited. addition, there fewer training samples task, may result in overfitting. To address these problems, we propose multi-task framework to train...
In this paper, we extend the free-energy principle to video quality assessment (VQA) by incorporating with recent psychophysical study on human visual speed perception (HVSP). A novel metric, namely inspired metric (FePVQ), is therefore developed and applied perceptual coding optimization. The suggests that system (HVS) can actively predict "orderly" information avoid "disorderly" for image perception. Basically, associated skeletons edges of objects, mostly concerns textures in images....
Abstract This paper presents three distinct wave trains that occurred on 2023 April 21: a broad quasiperiodic fast-propagating (QFP) train and bidirectional narrow QFP trains. The expands outward in circular front, while propagate the northward southward directions, respectively. concurrent presence of offers remarkable opportunity to investigate their respective triggering mechanisms. Measurement shows speed is range 300–1100 km s −1 different propagating directions. There significant...
The OpenUniverse2024 simulation suite is a cross-collaboration effort to produce matched simulated imaging for multiple surveys as they would observe common sky. Both the data and associated tools used it are intended uniquely enable wide range of studies maximize science potential next generation cosmological surveys. We have produced approximately 70 deg$^2$ Vera C. Rubin Observatory Legacy Survey Space Time (LSST) Wide-Fast-Deep survey Nancy Grace Roman Telescope High-Latitude Wide-Area...