A5006807602- Earthquake Detection and Analysis
- Ionosphere and magnetosphere dynamics
- Solar and Space Plasma Dynamics
- earthquake and tectonic studies
- High-pressure geophysics and materials
- Geological and Geochemical Analysis
- Advanced Photocatalysis Techniques
- Astrophysics and Cosmic Phenomena
- Geological and Geophysical Studies
- Gas Sensing Nanomaterials and Sensors
- Radiation Detection and Scintillator Technologies
- Hydrocarbon exploration and reservoir analysis
- Electrocatalysts for Energy Conversion
- Seismology and Earthquake Studies
- Lightning and Electromagnetic Phenomena
- 2D Materials and Applications
- Advanced Nanomaterials in Catalysis
- Toxic Organic Pollutants Impact
- Biochemical and Molecular Research
- Dark Matter and Cosmic Phenomena
- Pulsars and Gravitational Waves Research
- Oil Spill Detection and Mitigation
- HIV Research and Treatment
- Particle Detector Development and Performance
- MXene and MAX Phase Materials
Shandong Academy of Environmental Science
2020-2025
Chinese Academy of Sciences
2010-2022
Institute of High Energy Physics
2012-2022
University of Science and Technology Beijing
2020-2022
Beijing National Laboratory for Molecular Sciences
2020-2022
Institute of Chemistry
2020-2022
University of Chinese Academy of Sciences
2022
China Academy of Printing Technology
2020
China University of Petroleum, Beijing
2017-2019
Beijing Institute of Technology
2019
During the 2010 rainy season in Yangbajing (4300 m above sea level) Tibet, China, a long-duration count enhancement associated with thunderclouds was detected by solar neutron telescope and monitors installed at Comic Ray Observatory. The event, lasting for $\sim$40 min, observed on July 22, 2010. significant $\gamma$-ray signals energies $>$40 MeV event. Such prolonged high-energy event has never been association thunderclouds, clearly suggesting that electron acceleration lasts 40 min...
Orbital donor–acceptor interactions play critical roles throughout chemistry, and hence, their regulation functionalization are of great significance. Herein we demonstrate for the first time investigation n→π* through strategy dynamic covalent chemistry (DCC), further showcase its use in stabilization imine. The interaction between donor X acceptor aldehyde/imine within 2-X-2′-formylbiphenyl derivatives was found to significantly influence thermodynamics imine exchange. orbital then...
Peptides derived from N-terminal heptad repeat (NHR) of the HIV-1 gp41 are generally poor inhibitors entry, because they tend to aggregate and do not form a trimeric coiled-coil. In this study, we have fused portions NHR, e.g. N36 or N28, T4 fibritin trimerization domain, Foldon (Fd), thus constructing novel NHR trimers, designated N36Fd N28Fd, which could be expressed in Escherichia coli cells. The purified N28Fd exhibited SDS-resistant coiled-coil conformation with improved alpha-helicity...
2D semiconductor crystals offer the opportunity to further extend Moore's law atomic scale. For practical and low-cost electronic applications, directly printing devices on substrates is advantageous compared conventional microfabrication techniques that utilize expensive photolithography, etching, vacuum-metallization processes. However, currently printed transistors are plagued by unsatisfactory electrical performance, thick layers, low device density. Herein, a facile scalable strategy...
The fast transitions between different types of quasi-periodic oscillations (QPOs) are generally observed in black hole transient sources (BHTs). We present a detailed study on the timing and spectral properties type-B QPOs MAXI~J1348--630, by \emph{Insight}-HXMT. fractional rms variability--energy relationship energy spectra reveal that probably originate from jet precession. Compared to weak power-law dominated power spectrum, when QPO is present, corresponding spectrum shows an increase...
We analyzed observation data collected by the Instrument for Detection of Particles (IDP) on board DEMETER satellite during a period 17 months in 2007 and 2008. In meantime, VLF transmitter located at North West Cape (NWC) ground station was shut down 7 working total 10 months. By an (on‐off) method, our analysis first time revealed detail transient properties space electron precipitation belt which is induced man‐made wave emitted from NWC. mapped flux distribution figured out regions that...
Hydrogen evolution reaction (HER) and oxygen (OER) through water decomposition are feasible methods to produce green clean energy. Herein, we report a facile two-step strategy for the preparation of non-noble metal defect-rich nanosheets by an electrochemical process at room temperature. First-principle calculations used study bifunctional catalytic mechanism defect engineering in transition-metal dichalcogenides (TMDs); from first-principle calculations, predicted that rich S vacancies on...
Solar neutron events provide important opportunities to explore particle acceleration mechanisms using data from ground-based detectors and spacecrafts. Energetic neutrons carry crucial physics information of the site, such as energy spectrum, atmospheric elements solar flare, scale height, convergence magnetic field magnetohydrodynamic turbulence. Here 12 representative observed on Earth, together with X γ-ray observations spacecrafts are presented. Theoretical approaches that carried out...
Neutron monitor (NM) in Yangbajing Cosmic Ray Observatory mainly detects nucleus components with energy a range of 500 MeV20 GeV and small number negative muons. On the basis synchronous data neutron atmospheric electric field during 62 thunderstorms from 2008 to 2010, obvious changes NM counting rate 27 significance greater than S5 are found, among them, 13 cases S10 . A coincident approximate change trend is found between percentage amplitude for However no 14 5 Obvious do not occur when...
The Cangdong Sag is a complex Cenozoic rift basin at the center of Bohai Bay Basin. structures in can be subdivided into Fault System west and Xuxi east. geometry boundary faults varies along axes half-grabens. According to cross-sectional strata geometry, unconformity planar structural pattern, evolution divided four distinct stages: (1) major Paleocene initial rift, (2) latest Paleocene-early Eocene intensive (3) late Eocene-Oligocene strike-slip superimposed (4) Neogene present-day...
Cesium halide has a simple cubic crystal structure and hosts low thermal conductivity, but its microscopic mechanism not been fully understood. In the present work, we took cesium iodide (CsI) single as an example, to investigate lattice dynamics conductivity by performing inelastic neutron scattering (INS), heat transport measurements, first-principles calculations. The temperature dependent phonon dispersions of CsI were obtained from INS anharmonicity transverse optic $(o)$ acoustic $(a)$...
The physics mechanisms of radiation belt electrons loss and acceleration are important issues in space research. Recently, France Microsatellite DEMETER has discovered the correlation between man-made VLF signals precipitation NPM(the U.S. transmitter located at Lualualei) experiment. Our research focuses on explanation relation among affected pitch angle distribution, kinetic energy position electrons. This is achieved by calculating local diffusion coeffcient based theory qusi-linear with...
One of the instruments onboard China Seismic Electromagnetic Satellite (CSES) is Low Energy Particle Detector (LEPD). The primary objective LEPD to provide measurements fluxes, energy spectra and pitch angles 100 keV 10 MeV electrons protons from 2 50 in Earth's magnetosphere. geometric factor one principle parameters a detector, which converts physical quantity—count rate particle quantity-flux. In this paper, we calculated via computer modeling an isotropic radiation environment. It was...
Abstract We report new U–Pb isotopic data for detrital zircons from Cambrian–Ordovician strata on the northern margin of western Yangtze Block, which together with published coeval in South China provide critical constraints provenance these sediments and further shed light early Palaeozoic position Block context Gondwana. Detrital this study yield four major age peaks Palaeoproterozoic, Neoproterozoic, middle Neoproterozoic late – Palaeozoic. The dominant population 900–700 Ma matches well...
The lithosphere activity during seismogenic process or occurrence of one earthquake may emit electromagnetic waves which propagate to ionosphere and radiation belt, then induce disturbance electric magnetic field the precipitation high energy charged particles induced by pitch angle scattering from interaction wave particle. This paper, based on data detected DEMETER satellite, presents particle burst (PB) with 4 6 times enhancement over average value observed about ten days before Chile in...
Fucokinase/L-fucose-1-P-guanylyltransferase (FKP) is a bifunctional enzyme which converts L-fucose to Fuc-1-P and thence GDP-L-fucose through salvage pathway. The molecular weights of full-length FKP (F-FKP) C-terminally truncated (C-FKP, residues 300–949) are 105.7 71.7 kDa, respectively. In this study, both recombinant F-FKP C-FKP were expressed purified. Size-exclusion chromatography experiments analytical ultracentrifugation results showed that trimers. Native protein was crystallized by...
The low energy particle detector (LEPD) is one of the main payloads onboard China seismic electromagnetic satellite (CSES). designed to ascertain space electrons (0.1–10 MeV) and protons (2–50 MeV). It has capability identifying protons, measure spectrum incident angle particles. LEPD made up a silicon tracker system, CsI (Tl) mini-calorimeter, an anti-coincidence system by plastic scintillator, as well electronics data acquisition (DAQ). also kind ΔE-E telescope; it consists two layers...
The silicon-strip tracker of the China Seismo-Electromagnetic Satellite (CSES) consists two double-sided silicon strip detectors (DSSDs) which provide incident particle tracking information.The low-noise analog ASIC VA140 was used in this study for DSSD signal readout.A beam test on module performed at Beijing Test Beam Facility Electron Positron Collider (BEPC) using a 400~800 MeV/c proton beam.The pedestal analysis results, RMSE noise, gain correction, and intensity distribution particles...