Xin-Chen He
A5109801022- Cosmology and Gravitation Theories
- Astrophysics and Cosmic Phenomena
- Pulsars and Gravitational Waves Research
- Relativity and Gravitational Theory
- Dark Matter and Cosmic Phenomena
- Black Holes and Theoretical Physics
- Gamma-ray bursts and supernovae
- Geophysics and Gravity Measurements
- Astrophysical Phenomena and Observations
- Advanced Image Fusion Techniques
- Precipitation Measurement and Analysis
- Galaxies: Formation, Evolution, Phenomena
- Radio Astronomy Observations and Technology
- Lightning and Electromagnetic Phenomena
- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Remote Sensing and Land Use
- Remote-Sensing Image Classification
Qiqihar University
2024
University of Science and Technology of China
2023-2024
Sun Yat-sen University
2021-2024
Guangdong Polytechnic of Science and Technology
2024
Geological Exploration Technology Institute of Jiangsu Province
2024
Campbell Collaboration
2023
We propose a new probe of primordial non-Gaussianities (NGs) through the observation gravitational waves (GWs) induced by ultra-light (MPBH<109g) black holes (PBHs). Interestingly enough, existence NG can leave imprints on clustering properties PBHs and spectral shape GW signals. Focusing scale-dependent local-type NG, we identify distinct double-peaked energy spectrum that, contingent upon MPBH abundance at time formation, denoted as ΩPBH,f, may fall into frequency bands upcoming...
We present the first catalog of very-high energy and ultra-high gamma-ray sources detected by Large High Altitude Air Shower Observatory (LHAASO). The was compiled using 508 days data collected Water Cherenkov Detector Array (WCDA) from March 2021 to September 2022 933 recorded Kilometer Squared (KM2A) January 2020 2022. This represents main result most sensitive large coverage survey sky above 1 TeV, covering declination $-$20$^{\circ}$ 80$^{\circ}$. In total, contains 90 with an extended...
Abstract Ultra-light primordial black holes (PBHs) with masses M PBH < 5 × 10 8 g can dominate transiently the energy budget of Universe and reheat through their evaporation taking place before Big Bang Nucleosynthesis. The isocurvature density fluctuations associated to inhomogeneous distribution a population such PBHs induce an abundant production GWs due second-order gravitational effects. In this work, we discuss effect non-Gaussianity on clustering properties study clustered spectral...
The hyperspectral image (HSI) classification task is widely used in remote sensing analysis. HSI methods based on convolutional neural networks (CNNs) have greatly improved the performance. However, they cannot well utilize sequential properties of spectral features and face challenge increasing computational cost with increase network depth. To address these shortcomings, this paper proposes a novel CNN-Mamba architecture, called DBMamba, which uses bidirectional Mamba to process feature...
Recently, the NANOGrav, PPTA, EPTA, and CPTA Collaborations independently reported their evidence of Stochastic Gravitational Waves Background (SGWB). While inferred gravitational-wave background amplitude spectrum are consistent with astrophysical expectations for a signal from population supermassive black-hole binaries (SMBHBs), search new physics remains plausible in this observational window. In work, we explore possibility explaining such by scalar-induced gravitational waves (IGWs)...
The Large High Altitude Air Shower Observatory (LHAASO) has three sub-arrays, KM2A, WCDA and WFCTA. flux variations of cosmic ray air showers were studied by analyzing the KM2A data during thunderstorm on 10 June 2021. number shower events that meet trigger conditions increases significantly in atmospheric electric fields, with maximum fractional increase 20%. rates (increases or decreases) are found to be strongly dependent primary zenith angle. secondary particles significantly, following...
Ultra-light primordial black holes (PBHs) with masses $M_{\rm PBH}<5\times 10^8\mathrm{g}$ can dominate transiently the energy budget of Universe and reheat through their evaporation taking place before Big Bang Nucleosynthesis. The isocurvature density fluctuations associated to inhomogeneous distribution a population such PBHs induce an abundant production GWs due second-order gravitational effects. In this work, we discuss effect non-Gaussianity on clustering properties study clustered...
We propose a new probe of primordial non-Gaussianities (NGs) through the observation gravitational waves (GWs) induced by ultra-light ($M_{\text{PBH}}< 10^{9}\rm{g}$) black holes (PBHs). Interestingly enough, existence NG can leave imprints on clustering properties PBHs and spectral shape GW signals. Focusing scale-dependent local-type NG, we identify distinct double-peaked energy spectrum that, contingent upon $M_{\text{PBH}}$ abundance at time formation, denoted as $\Omega_\mathrm{PBH,f}$,...
Abstract The LHAASO-WFCTA experiment, which aims to observe cosmic rays in the sub-EeV range using fluorescence technique, uses a new generation of high-performance telescopes. To ensure that experiment has excellent detection capability associated with measurement energy spectrum, primary composition rays, and so on, an accurate geometrical reconstruction air-shower events is fundamental. This paper describes development testing for stereo viewed WFCTA (Wide Field view...
Water Cherenkov detector array (WCDA) is one of the key parts Large High Altitude Air Shower Observatory (LHAASO), construction which was completed by end 2020. The WCDA covers a 78 000-m <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> area and there exist 3120 large size photomultiplier tubes (PMTs) in three ponds: 8-in PMTs are used pond No. 1 20-in ponds 2 3. front-end electronics (FEE) system based on multigain measurement technique...