A5100427406- Solar and Space Plasma Dynamics
- Ionosphere and magnetosphere dynamics
- Optical measurement and interference techniques
- Optical Systems and Laser Technology
- Adaptive optics and wavefront sensing
- Calibration and Measurement Techniques
- Astro and Planetary Science
- Advanced Measurement and Metrology Techniques
- Surface Roughness and Optical Measurements
- Planetary Science and Exploration
- Optical Coatings and Gratings
- Geomagnetism and Paleomagnetism Studies
- Atomic and Molecular Physics
- Photocathodes and Microchannel Plates
- Solar Radiation and Photovoltaics
- Stellar, planetary, and galactic studies
- Advanced X-ray Imaging Techniques
- Advanced Measurement and Detection Methods
- Image Processing Techniques and Applications
- Topic Modeling
- Thin-Film Transistor Technologies
- Natural Language Processing Techniques
- Remote-Sensing Image Classification
- Atmospheric Ozone and Climate
- CCD and CMOS Imaging Sensors
Changchun Institute of Optics, Fine Mechanics and Physics
2015-2024
Chinese Academy of Sciences
2015-2024
University of Chinese Academy of Sciences
2018-2022
Aerospace Information Research Institute
2022
Shanghai Advanced Research Institute
2022
North China University of Science and Technology
2020
Xi'an Jiaotong University
2017-2019
Institute of Software
2016-2018
China Academy of Engineering Physics
2005-2018
Laser Fusion Research Center
2017
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...
Bo An, Chen, Xianpei Han, Le Sun. Proceedings of the 2018 Conference North American Chapter Association for Computational Linguistics: Human Language Technologies, Volume 1 (Long Papers). 2018.
Abstract The solar cycle, seasonal, and diurnal variations of the subauroral ion drifts (SAIDs) are investigated for first time to use such a large database 18,226 SAID events observed by DMSP satellites during 1987–2012. Statistical results show that SAIDs occur mostly at 60.1° invariant latitude 2230 magnetic local with typical half width 0.57°, move equatorward high activities widths, have two occurrence peaks in spring fall equinoxes valleys summer winter solstices. seasonal variation...
Abstract As one of the payloads for Advanced Space-based Solar Observatory (ASO-S) mission, Lyman-alpha (Ly α ) Telescope (LST) is aimed at imaging Sun and inner corona up to 2.5R ⊙ (mean solar radius) in both Ly (121.6 nm) visible wavebands with high temporo-spatial resolution, mainly targeting flares, coronal mass ejections (CMEs) filaments/prominences. LST observations allow us trace eruptive phenomena from disk center corona, study relationships between prominences/filaments, flares...
Abstract We present a case study for the global extreme-ultraviolet (EUV) wave and its chromospheric counterpart Moreton-Ramsey Wave associated with second X-class flare in Solar Cycle 25 halo coronal mass ejection (CME). The EUV was observed H α passbands different characteristic temperatures. In 171 Å 193/195 images, propagates circularly an initial velocity of 600–720 km s −1 deceleration 110–320 m −2 . local plasma is heated from log( T/K ) ≈ 5.9 to 6.2 during passage front. 304 images...
The newly launched Fengyun-3D (FY-3D) satellite carried a wide-field auroral imager (WAI) that was developed by Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy Sciences (CIOMP), which will provide large field view (FOV), high spatial resolution, broadband ultraviolet images the aurora ionosphere imaging N2 LBH bands emissions. WAI consists two identical cameras, each with an FOV 68° in along-track direction 10° cross-track direction. cameras are tilted relative to...
The development of deep learning has brought new prospects into the field hyperspectral classification, and classification ability this method for images (HSIs) been continuously improved. However, there are still some problems that must be solved; example, spectral–spatial features HSIs not effectively extracted, labeled samples in data set limited, number different categories is imbalanced. To facilitate progress a fractal residual convolutional neural network with balance augmentation...
Abstract This paper reports double‐peak subauroral ion drifts (DSAIDs), which is unique subset of (SAIDs). A statistical analysis has been carried out for the first time with a database 454 DSAID events identified from Defense Meteorological Satellite Program observations 1987 to 2012. Both case studies and analyses show that two velocity peaks DSAIDs are associated temperature region‐2 field‐aligned currents (R2‐FACs) in midlatitude ionospheric trough located low‐conductance region....
High-resolution thermal infrared (TIR) remote sensing images can more accurately retrieve land surface temperature and describe the spatial pattern of urban environment. The Thermal Infrared Spectrometer (TIS), which has high resolution among spaceborne sensors at present, global data acquisition capability, is one equipped in SDGSAT-1. It an important complement to existing international mainstream satellites. In order produce standard products, rapidly accurately, automatic registration...
The solar X-ray and Extreme Ultraviolet Imager (X-EUVI), developed by the Changchun Institute of Optics, Fine Mechanics Physics, Chinese Academy Sciences (CIOMP), is first space-based ultraviolet (EUV) imager China loaded on Fengyun-3E (FY-3E) satellite supported Meteorological Administration (CMA) for observation. Since started work July 11, 2021, X-EUVI has obtained many images. instrument employs an innovative dual-band design to monitor a much larger temperature range Sun, which covers...
The EUV imager on board the Chang'E‐3 lunar lander will image Earth's plasmasphere from a perspective to focus some of open questions in plasmaspheric researches (i.e., global structures, erosion, and refilling plasmasphere). In order achieve understanding dynamics relation these images perspective, He + 30.4 nm emission intensities structures viewed moon are investigated using dynamic core plasma model embedded with TS07 magnetic field W05 electric model. Two typical storms observed by...
Abstract The Moon‐based Extreme Ultraviolet Camera (EUVC) aboard China's Chang'e‐3 (CE‐3) mission has successfully imaged the entire Earth's plasmasphere for first time from side views on lunar surface. An EUVC image 21 April 2014 is used in this study to demonstrate characteristics and configurations of EUV imaging illustrate determination algorithm plasmapause locations magnetic equator. determined all available images with Minimum L Algorithm are quantitatively compared those extracted...
Abstract The Moon-based Extreme Ultraviolet Camera (EUVC) of the Chang’e 3 mission provides a global and instantaneous meridian view (side view) Earth’s plasmasphere. plasmasphere is one inner component whole magnetosphere configuration sensitive to magnetospheric activity (storms substorms). However, response plasmaspheric substorms only partially understood EUVC observations provide good opportunity investigate this issue. By reconstructing based on images observed during 20–22 April 2014,...
The process of development and calibration for the first Moon-based extreme ultraviolet (EUV) camera to observe Earth's plasmasphere is introduced design, test results are presented. EUV composed a multilayer film mirror, thin filter, photon-counting imaging detector, mechanism that can adjust direction in two dimensions, protective cover, an electronic unit thermal control unit. center wavelength 30.2 nm with bandwidth 4.6 nm. field view 14.7° angular resolution 0.08°, sensitivity 0.11...
Abstract Reflectance, transmittance, and absorption of materials are also known as materials’ Fresnel problem. It is widely accepted that Interface model can be utilized to solve problem two dimensional materials. Here, we question the validity model. Theoretical experimental results analyzed, theoretical optical response derived based on thin film A new simple, approximate formula 4 πnkd/λ proposed for calculation found that, in essence, a kind style model, main difference between models...
Recently, the classification of hyperspectral images has made great process.Especially, methods based on three-dimensional convolutional neural network have remarkable performance due to uniqueness images.However, still faces challenges a series problems such as insufficient extraction spectralspatial features, lack labeled samples, large amount noise, tendency overfitting and so on.Therefore, SSDANet is proposed solve above promote further development technology deep learning.SSDANet...
ASO-S is a mission proposed for the 25th solar maximum by Chinese community. The scientific objectives are to study relationships among magnetic field, flares, and coronal mass ejections (CMEs). consists of three payloads: Full-disk Magnetograph (FMG), Lyman-alpha Solar Telescope (LST), Hard X-ray Imager (HXI), measure observe CMEs respectively. now under phase-B studies. This paper makes brief introduction mission.
Abstract A large database of more than 18,000 subauroral ion drift (SAID) events from DMSP observations 1987 to 2012 is used systematically investigate the features SAID. SAID occurs mostly at ~62°/−60° magnetic latitude (MLAT) and ~22:15/22:45 local time (MLT) for geomagnetically quiet conditions ~58°/−56° MLAT MLT disturbed in North Hemisphere (NH)/South (SH), respectively. Significant north‐south asymmetries occurrence, shape, geomagnetic activity variations are found this statistical...
A Mott-Davis-Paracrystalline model was proposed to interpret thickness effect of the band gap for amorphous germanium (a-Ge). We believe that a-Ge has a semiconductor-alloy-like structure, it may contain medium-range order (MRO) and continuous random network (CRN) simultaneously there is dependence MRO/CRN ratio on film preparation methods/parameters. For MRO dominant, can be described by one-dimensional quantum confinement (ODQC) nanocrystals strain-induced shrinkage gap; CRN interpreted...
A major challenge of semantic parsing is the vocabulary mismatch problem between natural language and target ontology.In this paper, we propose a sentence rewriting based method, which can effectively resolve by into new form has same structure with its logical form.Specifically, two sentence-rewriting methods for common types mismatch: dictionary-based method 1-N template-based N-1 mismatch.We evaluate our parser on benchmark dataset -WEBQUESTIONS.Experimental results show that system...