A5076068224- Solar and Space Plasma Dynamics
- Stellar, planetary, and galactic studies
- Astro and Planetary Science
- Solar Radiation and Photovoltaics
- Adaptive optics and wavefront sensing
- Geomagnetism and Paleomagnetism Studies
- Astronomical Observations and Instrumentation
- Ionosphere and magnetosphere dynamics
- Distributed and Parallel Computing Systems
- Astronomy and Astrophysical Research
- Geophysics and Gravity Measurements
- CCD and CMOS Imaging Sensors
- Infrared Target Detection Methodologies
- Gamma-ray bursts and supernovae
- Advanced Image Processing Techniques
- Astrophysics and Star Formation Studies
- Scientific Computing and Data Management
- Optical Systems and Laser Technology
- Advanced Vision and Imaging
- Advanced Data Storage Technologies
- Research Data Management Practices
- Calibration and Measurement Techniques
- Image Enhancement Techniques
- Computational Physics and Python Applications
- Astrophysical Phenomena and Observations
Yunnan Observatories
2016-2025
Chinese Academy of Sciences
2013-2025
University of Chinese Academy of Sciences
2021-2024
Northeastern University
2024
National Astronomical Observatories
2013-2023
Kunming University of Science and Technology
2009-2019
Nanjing University
2013
Nanjing Institute of Environmental Sciences
2013
University of Colorado Colorado Springs
2000
Kalman filter is a minimum-variance estimation for dynamic systems and has attracted much attention with the increasing demands of target tracking. Various algorithms was proposed deriving optimal state in last thirty years. This paper briefly surveys recent developments about (KF), Extended (EKF) Unscented (UKF). The basic theories are introduced, merits demerits them analyzed compared. Finally relevant conclusions development trends given.
Solid evidence of magnetic reconnection is rarely reported within sunspots, the darkest regions with strongest fields and lowest temperatures in solar atmosphere. Using world's largest telescope, 1.6-meter Goode Solar Telescope, we detect prevalent through frequently occurring fine-scale jets H${\alpha}$ line wings at light bridges, bright lanes that may divide dark sunspot core into multiple parts. Many have an inverted Y-shape, shown by models to be typical a unipolar field environment....
Abstract The Lobster Eye Imager for Astronomy (LEIA) detected a new X-ray transient on 2022 November 7, identified as superflare event occurring nearby K-type giant star HD 251108. flux increase was also in follow-up observations at X-ray, UV, and optical wavelengths. flare lasted about 40 days soft observations, reaching peak luminosity of ∼1.1 × 10 34 erg s −1 0.5–4.0 keV, which is roughly 60 times the quiescent luminosity. Optical brightening observed only one night. light curve well...
We investigate the traveling kink oscillation triggered by a solar flare on 2022 September 29. The observational data is mainly measured Solar Upper Transition Region Imager (SUTRI), Atmospheric Imaging Assembly (AIA), and Spectrometer/Telescope for X-rays (STIX). transverse oscillations with apparent decaying in amplitudes, which are nearly perpendicular to oscillating loop, observed passbands of SUTRI 465 A, AIA 171 193 A. launched erupted closely one footpoint coronal loops, then it...
Abstract Semidetached binaries are in the stage of mass transfer and play a crucial role studying physics between interacting binaries. Large-scale time-domain surveys provide many light curves binary systems, while Gaia offers high-precision astrometric data. In this paper, we develop, validate, apply pipeline that combines Markov Chain Monte Carlo method with forward model DBSCAN clustering to search for semidetached estimate inclination, relative radius, ratio, temperature ratio each...
Hand gesture recognition has become one of the key techniques human-computer interaction (HCI). Many researchers are devoted in this field. In paper, firstly history hand is discussed and technical difficulties also enumerated. Then, we analyze definition introduce basic principle it. The approaches for recognition, such as vision-based, glove-based depth-based, contrasted briefly paper. But former two methods too simple not natural enough. Currently, new finger identification technique with...
Abstract Based on 2 minute cadence TESS data from sectors 1–50, we report the results of systematic extraction δ Scuti–type pulsations in 6431 eclipsing binaries with orbital periods shorter than 13 days. A total number 242 pulsators were found those systems, including 143 new discoveries. We examined their pulsation properties based H-R diagram and relationships between dominant period P dom , orb effective temperature T eff . As a consequence, 216 targets are likely Scuti stars (123 new),...
Abstract Solar flares stronger than X10 (S-flares, >X10) are the highest-class that significantly impact on Sun's evolution and space weather. Based observations of Geostationary Orbiting Environmental Satellites at soft X-ray wavelength daily sunspot numbers (DSNs) since 1975, we obtained some interesting heuristic conclusions: (1) both S-flares more powerful extremely strong (ES-flares, >X14.3) mostly occur in late phases solar cycles (SCs) low-latitude regions disk; (2) similar to...
Abstract The failure of a filament eruption caused by magnetic reconnection between the erupting and overlying field has been previously proposed in numerical simulations. It is, however, rarely observed. In this study, we report an its coronal loops that results eruption. On 2023 September 24, was located active region 13445. slowly rose, quickly erupted, rapidly decelerated, then finally stopped, with untwisting motion. As failed eruption, event is associated M4.4 flare but no mass...
Abstract EL CVn–type systems represent a rare evolutionary stage in binary star evolution, providing ideal laboratories for investigating stable mass-transfer processes and the formation of extremely low-mass white dwarfs (ELM WDs). The Transiting Exoplanet Survey Satellite (TESS) has delivered an extensive collection high-precision time-domain photometric data, which is invaluable studying CVn binaries. In this study, we identified 29 from TESS eclipsing catalogs (sectors 1–65), 11 are...
Abstract We analyze high-resolution observations of an X-1.0 white-light flare, triggered by a filament eruption, on 2022 October 2. The full process formation and subsequent eruption was captured in the H α passband Visible Imaging Spectrograph (VIS) board Goode Solar Telescope (GST) within its center field view. White-light emissions appear flare ribbons following ribbon brightening. GST Broadband Filter Imager data show that continuum intensity, as compared to nearby quiet-Sun area, has...
Solar prominences are very spectacular structures embedded in the tenuous and hot solar corona. The counterstreaming flows, a common feature quiescent prominences, have been discovered for more than twenty years. However, mechanism driving flows is still elusive. To unveil nature of this phenomenon, we analyzed data prominence observed by New Vacuum Telescope (NVST), Interface Region Imaging Spectrograph (IRIS), Dynamical Observatory (SDO). It found that there distinct longitudinal...
Abstract Solar prominences are very spectacular structures embedded in the tenuous and hot solar corona. Counterstreaming flows, a common feature quiescent prominences, have been discovered for more than 20 yr. However, mechanism driving counterstreaming flows is still elusive. To unveil nature of this phenomenon, we analyzed data prominence observed by New Vacuum Telescope, Interface Region Imaging Spectrograph, Dynamical Observatory. It found that there distinct longitudinal oscillation...
Abstract Semidetached binaries, distinguished by their mass transfer phase, play a crucial role in elucidating the physics of within interacting binary systems. To identify these systems eclipsing light curves provided large-scale time-domain surveys, we have developed methodology training two distinct models that establish mapping relationship between parameters (orbital and physical parameters) semidetached binaries corresponding curves. The first model corresponds to scenarios where more...
This study is to correct magnetic saturation and wavelength shift in Full-disk Magnetograph (FMG) solar field measurements on the Advanced Space-based Solar Observatory (ASO-S) satellite. Due its single-wavelength polarization data limitations, currently, FMG relies linear calibration. We propose a residual network model output line-of-sight (LOS) which trained with HMI LOS fields as target, Stokes I, V velocity components inputs. Compared traditional methods, our achieves lower MAE, RMSE,...
Abstract Image alignment plays a crucial role in solar physics research, primarily involving translation, rotation, and scaling. The different wavelength images of the chromosphere transition region have structural complexity differences similarity, which poses challenge to their alignment. Therefore, novel approach based on dense optical flow (OF) RANSAC algorithm is proposed this paper. It takes OF vectors similar regions between be used as feature points for matching. Then, it calculates...
Abstract Coronal rain (CR) is a crucial part of the mass cycle between corona and chromosphere. It includes flare-driven CR two types quiescent CR, along nonflaring active region closed loops open structures, separately, labeled as type I, II, III respectively. Among them, I are generally associated with magnetic reconnection. In this study, employing data taken by Solar Dynamics Observatory Upper Transition Region Imager on 2022 October 11, we report three during an interchange reconnection...
We study the umbral waves as observed by chromospheric imaging observations of two sunspots with New Solar Telescope at Big Bear Observatory. find that wavefronts (WFs) rotate clockwise and form a one-armed spiral structure in first sunspot, whereas two- three-armed structures arise second sunspot where WFs anticlockwise alternately. All arms display propagation outwards become running penumbral once they cross boundaries, suggesting propagate along same inclined field lines. propose may be...
Abstract A contact binary may be the progenitor of a red nova that eventually produces merger event and have cut-off period around 0.2 days. Therefore, large number binaries is needed to search for novae study characteristics short-period binaries. In this paper, we employ Phoebe program generate light curves based on fundamental parameters Using these as samples, an autoencoder model trained, which can reconstruct very well. When error between output curve from input large, it due other...
Abstract We report a possible current sheet region associated with small-scale magnetic reconnection event by using the spectral and imaging observations of Interface Region Imaging Spectrograph ( IRIS ) magnetograms obtained Solar Dynamics Observatory on 2016 August 08. The length width are estimated to be from 1.4 ± 0.1 Mm 3.0 0.3 0.34 0.01 0.64 0.09 Mm, respectively. evolutions positively correlated that width. These measurements among smallest reported. When slit scans region,...
Abstract The Full-disk vectorMagnetoGraph (FMG) instrument will carry out polarization observations at one wavelength position of the Fe I 5324.179 °A spectral line. This paper describes how to choose this single position, relevant data-processing and magnetic field calibrations based on measured signals position. It is found that solar radial Doppler velocity, which can cause line shift, a disadvantageous factor for linear calibration Observations two symmetric positionsmay significantly...
Abstract We study the early evolution of a hot-channel-like magnetic flux rope (MFR) toward eruption. Combining with imaging observation and field extrapolation, we find that hot channel possibly originated from preexisting seed MFR hyperbolic tube (HFT). In precursor phase, three-dimensional tether-cutting reconnection at HFT is most likely resulting in heating buildup channel. this process, forming was rapidly enlarged its spatial size slipped feet to two remote positions. Afterward, it...
Convolutional neural networks (CNNs) in deep learning enable the extraction of features image data. Through multi-layer superposition a convolutional network, we can better capture essential characteristics different auroral subclasses and further classify images detail. Because morphological often present abstract characteristics, our study compares CNN architectures layering order to test best network model for mesoscale aurora classification. Although classification models used by us are...