A5100674098- Solar and Space Plasma Dynamics
- Ionosphere and magnetosphere dynamics
- Astro and Planetary Science
- Geomagnetism and Paleomagnetism Studies
- Stellar, planetary, and galactic studies
- Cryospheric studies and observations
- Climate change and permafrost
- Tropical and Extratropical Cyclones Research
- Solar Radiation and Photovoltaics
- Atmospheric Ozone and Climate
- Earthquake Detection and Analysis
- Winter Sports Injuries and Performance
- Industrial Technology and Control Systems
- Geophysics and Gravity Measurements
- Advanced Malware Detection Techniques
- Security and Verification in Computing
- Computational Geometry and Mesh Generation
- Advanced Computational Techniques and Applications
- Metaheuristic Optimization Algorithms Research
- Network Time Synchronization Technologies
- Smart Grid Security and Resilience
- Quantum Mechanics and Applications
- Evolutionary Algorithms and Applications
- Advanced Thermodynamics and Statistical Mechanics
- Cosmology and Gravitation Theories
Beijing University of Technology
2025
Université Paris Cité
2020-2024
Laboratoire d’études spatiales et d’instrumentation en astrophysique
2020-2024
Université Paris Sciences et Lettres
2020-2024
Université de Versailles Saint-Quentin-en-Yvelines
2021-2024
Sorbonne Université
2020-2024
Observatoire de Paris
2020-2024
Centre National de la Recherche Scientifique
2020-2024
Northeastern University
2024
University of California, Berkeley
2024
Abstract We report on the first direct in situ measurements of a fast coronal mass ejection (CME) and shock corona, which occurred 2022 September 5. In from Parker Solar Probe spacecraft near perihelion suggest two shocks, with second one decayed, is consistent more than eruption coronagraph images. Despite flank crossing, indicate unique features young ejecta: plasma much hotter ambient medium, suggestive hot solar source, large β implying highly non-force-free state importance thermal...
Abstract In spintronics, devices exhibiting large, widely tunable magnetocurrent ( MC ) values at room temperature are particularly appealing due to their potential in advanced sensing, data storage, and multifunctional technologies. Organic semiconductors (OSCs), with rich unique spin‐dependent (opto‐)electronic properties, hold significant promise for realizing such devices. However, current organic constrained by limited design strategies, yielding typically confined tens of percent,...
Switchbacks are rapid magnetic field reversals that last from seconds to hours. Current Parker Solar Probe (PSP) observations pose many open questions in regard the nature of switchbacks. For example, they stable as propagate through inner heliosphere, and how formed? In this work, we aim investigate structure origin order study stability switchbacks, suppose small-scale current sheets therein generated by braiding, should work stabilize With more than one thousand switchbacks identified...
As fundamental parameters of the Sun, Alfv\'en radius and angular momentum loss determine how solar wind changes from sub-Alfv\'enic to super-Alfv\'enic Sun spins down. We present an approach determining flux based on observations Parker Solar Probe (PSP). A about $0.15\times10^{30}$ dyn cm sr$^{-1}$ near ecliptic plane 0.7:1 partition that between particles magnetic field are obtained by averaging data first four encounters within 0.3 au Sun. The its particle component decrease with speed,...
Abstract Quasi-thermal noise (QTN) spectroscopy is a valuable method to deduce important parameters in space plasma, such as plasma density and temperature, especially when direct particle measurements are not available. The present study develops new fitting fit the QTN spectra observed by Parker Solar Probe (PSP) with comprehensive theoretical spectral model. By combining steepest descent Levenberg–Marquardt algorithms, more flexible initial guess values but still yields reliable solar...
Abstract Alfvén waves, considered one of the primary candidates for heating and accelerating fast solar wind, are ubiquitous in spacecraft observations, yet their origin remains elusive. In this study, we analyze data from first 19 encounters Parker Solar Probe report dominance 2 minute oscillations near surface. The frequency-rectified trace magnetic power spectral density (PSD) these indicates that fluctuation energy is concentrated around minutes “youngest” wind. Further analysis using...
In general, slow solar wind from the streamer belt forms a high plasma beta equatorial sheet around heliospheric current (HCS) crossing, namely (HPS). Current Parker Solar Probe (PSP) observations show that HCS crossings near Sun could be full or partial crossing (PCS), and they share some common features but also have different properties. this work, using PSP encounters 4 to 10, we identify enhancements in beta, further use electron pitch angle distributions separate it into HPS PCS...
Abstract We present observations of three-dimensional magnetic power spectra in wavevector space to investigate the anisotropy and scalings sub-Alfvénic solar wind turbulence at magnetohydrodynamic (MHD) scale using Magnetospheric Multiscale spacecraft. The distributions are organized a new coordinate determined by wavevectors ( <?CDATA $\hat{{\boldsymbol{\kappa }}}$?> <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mover accent="true"> <mml:mi...
To adapt to the digital and intelligent trend of ship management meet requirements shipborne industrial Ethernet with high reliability strong real-time performance, this paper develops a shipboard redundant network card Zynq7000 series SoC chip as main controller, designs IEEE1588 IP core PRP on FPGA side SoC. The design IPCore can avoid impact jitter upper layer protocol stack time stamp accuracy; implements dual-network redundancy side, reducing software overhead ARM lowers switching...
We report analysis of sub-Alfv\'enic magnetohydrodynamic (MHD) perturbations in the low-\b{eta} radial-field solar wind using Parker Solar Probe spacecraft data from 31 October to 12 November 2018. calculate wave vectors singular value decomposition method and separate MHD into three types linear eigenmodes (Alfv\'en, fast, slow modes) explore properties role compressible heating. The there show a high degree Alfv\'enicity wind, with energy fraction Alfv\'en modes dominating (~45%-83%) over...
Abstract Understanding the transport of energy within space plasmas, particularly in solar wind, remains a complex challenge. Accurate measurement electron temperatures and their nonthermal characteristics is crucial for comprehending properties plasmas. Quasi-thermal-noise (QTN) spectroscopy has emerged as dependable tool precise parameters assessment it less susceptible to spacecraft effects than particle detectors. In this study, we apply QTN fitting method analyze data from Parker Solar...
Abstract Parker Solar Probe observes unexpectedly prevalent switchbacks, which are rapid magnetic field reversals that last from seconds to hours, in the inner heliosphere, posing new challenges understanding their nature, origin, and evolution. In this work, we investigate thermal states, electron pitch-angle distributions, pressure signatures of both inside outside separating a switchback into spike, transition region (TR), quiet period (QP). Based on our analysis, find proton temperature...
Abstract Microinstabilities and waves excited at moderate-Mach-number perpendicular shocks in the near-Sun solar wind are investigated by full particle-in-cell simulations. By analyzing dispersion relation of fluctuating field components directly issued from shock simulation, we obtain key findings concerning wave excitations front: (1) leading edge foot, two types electrostatic (ES) observed. The relative drift reflected ions versus electrons triggers an electron cyclotron instability...
Industrial control systems(ICS) are widely used in national infrastructure such as electricity, water conservancy and energy to the operation of production equipment. The ICS information security problems will cause a series consequences. This paper focuses on existing industrial communication protocols, studies secure protocols guarantee transmission datas, realizes end-to-end identity authentication data encryption Modbus/TCP protocol.
Abstract The continental regions of China are extensively covered by snow during winter. In this paper, the seasonal cover in Tien Shan and Altay mountains is observed analyzed, based on characteristics dry-cold accumulating under climatic conditions northwest China. Compared with humid-warm cover, characterized mainly small density, low water content, large temperature gradient, thick depth hoar, etc., its metamorphism dominated thermal exchange pressure overlying layers. According to data,...
Abstract We investigate the kinetic properties of a typical fast-mode shock inside an interplanetary coronal mass ejection (ICME) observed on 1998 August 6 at 1 au, including particle distributions and wave analysis with in situ measurements from Wind . Key results are obtained concerning shock–ICME interaction scales: (1) gyrating ions, which may provide energy dissipation addition to wave-particle interactions, around ramp; (2) despite enhanced proton temperature anisotropy shocked plasma,...
We report nonlinear wave–wave coupling related to whistler-mode or electron Bernstein waves in the near-Sun slow solar wind with Parker Solar Probe (PSP) data. Prominent plasma wave power enhancements usually exist near gyrofrequency (fce), identified as electrostatic and (Malaspina et al. 2020). find that these fce typically have a harmonic spectral structure further classify them into three types by characteristics of frequency electric power. For short, we will call type i, ii, iii waves....
Abstract Understanding the evolution of energetic particles in heliosphere is one most outstanding topics heliophysics studies. The spectra are pivotal to investigate their origin, acceleration and transport processes. Using STEREO A data, we an intensity enhancement ions associated with a stream interaction region (SIR) during decay phase gradual solar particle (SEP) event. We find SIR has fine structures include interface (SI) forward‐reverse shock pair, energy ion intensities show complex...
We report on the first direct in situ measurements of a fast coronal mass ejection (CME) and shock corona, which occurred 2022 September 5. In from Parker Solar Probe (PSP) spacecraft near perihelion suggest two shocks with second one decayed, is consistent more than eruptions coronagraph images. Despite flank crossing, indicate unique features young ejecta: plasma much hotter ambient medium suggestive hot solar source, large $\beta$ implying highly non-force-free state importance thermal...
Precise measurement of the electron temperature and their non-thermal characteristics in solar wind is essential for understanding energy transport plasma. The present study applies quasi-thermal noise (QTN) spectroscopy fitting method to analyze QTN measurements from Parker Solar Probe FIELDS radio instrument during antenna-unbiased intervals Encounters 2 13. electrons are assumed follow kappa velocity distributions our analysis yields relevant parameters across heliocentric distance (r) 12...
Abstract We develop a preliminary interplanetary disturbance index ( J <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msubsup> <mml:mrow/> <mml:mrow> <mml:mi mathvariant="normal">s</mml:mi> </mml:mrow> mathvariant="normal">W</mml:mi> </mml:msubsup> </mml:math> ) by applying the spectral whitening method to an energy coupling function with solar wind measurements during years 1998–2014 as input, which can be used indicator of perturbations in near-Earth wind....