A5102820250- Gamma-ray bursts and supernovae
- Astrophysics and Cosmic Phenomena
- Pulsars and Gravitational Waves Research
- Astro and Planetary Science
- SAS software applications and methods
- Astrophysical Phenomena and Observations
- Stellar, planetary, and galactic studies
- Semiconductor materials and devices
- Advancements in Semiconductor Devices and Circuit Design
- Dark Matter and Cosmic Phenomena
- Radiation Effects in Electronics
- Astronomy and Astrophysical Research
- Astronomical Observations and Instrumentation
- Neutrino Physics Research
- Chaos-based Image/Signal Encryption
- Optical Network Technologies
- Radio Astronomy Observations and Technology
- Semiconductor Lasers and Optical Devices
- Advanced Steganography and Watermarking Techniques
- Underwater Acoustics Research
- Photonic and Optical Devices
- Flow Measurement and Analysis
- Fractional Differential Equations Solutions
- Particle physics theoretical and experimental studies
- Advancements in Photolithography Techniques
Yunnan Observatories
2016-2025
Chinese Academy of Sciences
2016-2025
Hangzhou Normal University
2025
Tianjin Medical University
2025
Huazhong Agricultural University
2025
Air Force Engineering University
2024
Jiangnan University
2024
Gansu Provincial Hospital
2024
Ocean University of China
2021
Xidian University
2017-2020
We present multiwavelength observations of the afterglow GRB 130427A, brightest (in total fluence) gamma-ray burst (GRB) past 29 yr. Optical spectroscopy from Gemini-North reveals redshift to be z = 0.340, indicating that its unprecedented brightness is primarily result relatively close proximity Earth; intrinsic luminosities both and are not extreme in comparison other bright GRBs. a large suite spanning 300 s 130 days after demonstrate shows simple, smooth evolution at all frequencies,...
ABSTRACT Background Plasma protein has gained prominence in the non‐invasive predicting of lung cancer. We utilised Zeolite Zotero NaY‐based plasma proteomics to investigate its potential for multiple event predicting, including cancer diagnosis (task #1), lymph node metastasis detection #2) and tumour‒node‒metastasis (TNM) staging #3). Methods A total 4703 proteins were quantified from 241 participants based on a prospective cohort 2757 participants. An additional 46 external 735 used...
The brightest Gamma-ray burst, GRB 221009A, has spurred numerous theoretical investigations, with particular attention paid to the origins of ultra-high energy TeV photons during prompt phase. However, analyzing mechanism radiation in $\sim$MeV range been difficult because high flux causes pile-up and saturation effects most detectors. In this letter, we present systematic modeling time-resolved spectra using unsaturated data obtained from Fermi/GBM (precursor) SATech-01/GECAM-C (main...
Abstract Background The individualized prediction and discrimination of precancerous lesions gastric cancer (PLGC) is critical for the early prevention (GC). However, accurate non-invasive methods distinguishing between PLGC GC are currently lacking. This study therefore aimed to develop a risk model by machine learning deep techniques aid diagnosis GC. Methods In this study, total 2229 subjects were recruited from nine tertiary hospitals October 2022 November 2023. We designed comprehensive...
Abstract Photobiological hydrogen production is of great importance because its promise for generating clean renewable energy. In nature, green algae cannot produce as a result the extreme sensitivity hydrogenase to oxygen. However, we find that silicification‐induced aggregates can achieve sustainable photobiological even under natural aerobic conditions. The core–shell structure creates balance between photosynthetic electron generation and activity, thus allowing hydrogen. This finding...
Abstract The giant flares of soft gamma-ray repeaters (SGRs) have long been proposed to contribute at least a subsample the observed short bursts (GRBs). In this paper, we perform comprehensive analysis high-energy data recent bright GRB 200415A, which was located close Sculptor galaxy. Our results suggest that magnetar flare provides most natural explanation for observational properties including its location, temporal and spectral features, energy, statistical correlations, emissions. On...
A model of jet precession driven by a neutrino-cooled disc around spinning black hole is present in order to explain the temporal structure and spectral evolution gamma-ray bursts (GRBs). The differential rotation outer part neutrino dominated accretion may result inner central hole, hence drives precessed via annihilation disc. Both analytic numeric results for our are present. Our calculations show that hole-accretion disk system with mass $M \simeq 3.66 M_\odot$, rate $\dot{M} 0.54...
In the internal shock model for gamma-ray bursts (GRBs), synchrotron spectrum from fast cooling electrons in a homogeneous downstream magnetic field (MF) is too soft to produce low-energy slope of GRB spectra. However may decay with distance front. Here we show that becomes harder if undergo and inverse-Compton decaying MF. To reconcile this typical low energy $νF_ν\proptoν$, it required postshock MF time comparable bulk (corresponding length typically $\sim10^5$ skin depths); should...
Currently, age-related diseases are a serious global health problem. In this study, selenium- and zinc-biofortified bean sprouts (ZSB) were cultivated, the intervention effect on cognitive dysfunction was explored in aging mice model established by combining AlCl3 d-galactose treatment. The results showed that compared with group, ZSB could decrease accumulation of Al increase Zn Se mice. levels serum superoxide dismutase, glutathione, glutathione peroxidase liver acetylcholine brain...
Abstract The temporal evolution of the TeV emission GRB 221009A displays a smooth transition from an initial rapid rise to slower and eventually decay phase. light curve suggests afterglow origin emission. overlap between prompt keV–MeV early indicates that external inverse Compton (EIC) scattering photons electrons is inevitable. Since energy density much higher than during phase, EIC process dominates cooling electrons. rate influenced by anisotropy seed photon field, which depends on...
Abstract Synchrotron circular polarization of a nonthermal power-law electron distribution in gamma-ray bursts (GRBs) has been studied. However, some numerical simulations have shown that the resulting electrons is combination thermal component and component. In this paper, we investigate synchrotron using such hybrid energy relativistic within globally toroidal magnetic field GRB prompt optical emission. Our results show compared to solely model, degree (PD) model can vary widely band,...
We present deep optical photometry of the afterglow gamma-ray burst (GRB) 041006 and its associated hypernova obtained over 65 days after detection (55 R-band epochs on 10 different nights). Our early data (t < 4 days) joined with published GCN indicate a steepening decay, approaching Fν ∝ t-0.6 at times ≪ 1 day) t-1.3 late times. The break tb = 0.16 ± 0.04 is earliest reported jet among all GRB afterglows. During our first night, we 39 exposures spanning 2.15 hr from 0.62 to 0.71 that...
Underwater fishing nets represent a danger faced by autonomous underwater vehicles (AUVs). To avoid irreparable damage to the AUV caused nets, needs be able identify and locate them autonomously in advance. Whether can successfully depends on accuracy efficiency of detection. In this paper, we propose an object detection multiple receptive field network (MRF-Net), which is used recognize using forward-looking sonar (FLS) images. The proposed architecture center-point-based detector, uses...
Glycerol is an important platform compound with multidisciplinary applications, and glycerol production using low-cost sugar cane bagasse hydrolysate promising.
Abstract The analysis of gamma-ray burst (GRB) spectra often relies on empirical models lacking a distinct physical explanation. Previous attempts to couple with observed data focus individual studies, fitting segmented independent parameters. However, these approaches typically neglect explain the time evolution spectra. In this study, we propose novel approach by incorporating synchrotron radiation model provide self-consistent explanation for selection single-pulse GRBs. Our study...
Context. In recent years, some polarization measurements of gamma-ray bursts (GRBs) have been reported, and the polarization-angle (PA) rotation in prompt emission phase has found several bursts. The physical mechanism PA evolution is still unclear. this work, we studied origin a toroidal magnetic field. Aims. We aim to provide an explanation for GRBs find conditions that lead by 90 degrees magnetic-field (MF) model. Moreover, present observable properties MF model can be tested future....
The IceCube (IC) collaboration recently reported the detection of TeV-PeV extraterrestrial neutrinos whose origin is yet unknown. By photon-neutrino connection in $pp$ and $p\gamma$ interactions, we use \fermi-LAT observations to constrain IC detected neutrinos. We find that Galactic origins, i.e., diffuse due cosmic ray (CR) propagation Milky Way, from point sources, may not produce neutrino flux, thus these should be extragalactic origin. Moreover, gamma-ray bursts (GRBs) account for jets...
Abstract Photobiological hydrogen production is of great importance because its promise for generating clean renewable energy. In nature, green algae cannot produce as a result the extreme sensitivity hydrogenase to oxygen. However, we find that silicification‐induced aggregates can achieve sustainable photobiological even under natural aerobic conditions. The core–shell structure creates balance between photosynthetic electron generation and activity, thus allowing hydrogen. This finding...
Abstract We investigate the prompt emission and afterglow properties of short-duration gamma-ray burst (sGRB) 130603B another eight sGRB events during 2012–2015, observed by several multiwavelength facilities including Gran Canarias Telescope 10.4 m telescope. Prompt high energy data were obtained INTEGRAL-SPI-ACS, Swift-BAT, Fermi-GBM satellites. The INTEGRAL in range 0.1–10 MeV for 130603B, 140606A, 140930B, 141212A, 151228A do not show any signature extended or precursor activity their...
The Lorentz factor (LF) of gamma-ray burst (GRB) ejecta may be constrained by observations high-energy (HE) spectral attenuation. recent Fermi-LAT prompt GeV emission from several bright GRBs have led to conclusions unexpectedly large LFs, Γ>103. Here we revisit this problem with two main concerns. (1) With a one-zone assumption where all photons are assumed generated in the same region (radius) and time, self-consistently calculate γγ optical depth adopting target photon spectrum an HE...