A5100319579- Galaxies: Formation, Evolution, Phenomena
- Radio Astronomy Observations and Technology
- Cosmology and Gravitation Theories
- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- Pulsars and Gravitational Waves Research
- Astronomy and Astrophysical Research
- High-pressure geophysics and materials
- earthquake and tectonic studies
- Gamma-ray bursts and supernovae
- Seismic Waves and Analysis
- Geophysics and Gravity Measurements
- Spatial and Panel Data Analysis
- Regional Economic and Spatial Analysis
- Stellar, planetary, and galactic studies
- Regional Economics and Spatial Analysis
- Astronomical Observations and Instrumentation
- Geological and Geochemical Analysis
- Black Holes and Theoretical Physics
- Earthquake Detection and Analysis
- Transportation Planning and Optimization
- Geological and Geophysical Studies
- Geochemistry and Geologic Mapping
- Inertial Sensor and Navigation
- Scientific Research and Discoveries
Shanghai Astronomical Observatory
2018-2025
Wenzhou Medical University
2025
Zhejiang A & F University
2025
University of Chinese Academy of Sciences
2021-2024
Jilin University
2024
Tianjin University of Science and Technology
2024
Institute for Basic Science
2020-2022
Shanghai Jiao Tong University
2016-2022
National Taiwan University of Science and Technology
2020
Kavli Institute for the Physics and Mathematics of the Universe
2019
The Ultra-Light Axion (ULA) is a dark matter candidate with mass $\mathcal{O}(10^{-22})$eV and de Broglie wavelength of order kpc. Such an axion, also called the Fuzzy Dark Matter (FDM), thermalizes via gravitational force forms Bose-Einstein condensate. Recent studies suggested that quantum pressure from FDM can significantly affect structure formation in small scales, thus alleviating so-called "small-scale crisis". In this paper, we develop new technique to discretize illustrate...
We investigate the model of dark matter-dark energy (DM-DE) interaction with coupling strength proportional to multiplication sector densities different power indices $Q = \gamma \rho_{\rm c}^{\alpha} d}^{\beta}$. first modification cosmic expansion history, and then further develop formalism take into account cosmological perturbations matter temperature evolution. use latest observational cosmology data, including microwave background (CMB) baryon acoustic oscillations (BAO) redshift-space...
Context. Observations of the redshifted 21-cm line neutral hydrogen (H I ) are a new and powerful window observation that offers us possibility to map spatial distribution cosmic H learn about cosmology. Baryon Acoustic Oscillations from Integrated Neutral Gas (BINGO) is unique radio telescope designed be one first probe baryon acoustic oscillations (BAO) at frequencies. Aims. BINGO has two science goals: cosmology astrophysics. Cosmology main goal driver for BINGO’s design strategy. The key...
The interacting dark energy (IDE) model, which considers the interaction between and matter, provides a natural mechanism to alleviate coincidence problem can also relieve observational tensions under $\Lambda$CDM model. Previous studies have put constraints on IDE models by observations of cosmic expansion history, microwave background large-scale structures. However, these data are not yet enough distinguish from effectively. Because non-linear structure formation contains rich...
The deep learning technique has been employed in removing foreground contaminants from 21-cm intensity mapping, but its effectiveness is limited by the large dynamic range of amplitude. In this study, we develop a novel removal grounded U-Net networks. essence lies introducing an innovative data preprocessing step specifically, utilizing temperature difference between neighboring frequency bands as input. Combining with difference, refer to our method UNet-fd (UNet frequency-difference),...
As the second paper of a series on studying galaxy-galaxy lensing signals using Sloan Digital Sky Survey Data Release 7 (SDSS DR7), we present our measurement and modelling around groups galaxies. We divide into four halo mass bins, measure different halo-center tracers: brightest central galaxy (BCG), luminosity-weighted center, number-weighted center X-ray peak position. For SDSS DR7 cross identified groups, further split low high emission subsamples, both which are assigned with two...
Context. Observing the neutral hydrogen distribution across Universe via redshifted 21 cm line intensity mapping constitutes a powerful probe for cosmology. However, signal is obscured by foreground emission from our Galaxy and other extragalactic foregrounds. This paper addresses capabilities of BINGO survey to separate such signals. Aims. We show that instrumental, optical, simulations setup suitable component separation, we have appropriate tools understand control residuals....
We present simple to implement Wald-type statistics that deliver a general nonparametric inference theory for linear restrictions on varying coefficients in range of spatial autoregressive models. Our covers error dependence form, allows degree misspecification robustness via weights and permits both regression coefficients. One application our method finds evidence constant returns scale the production function Chinese nonmetal mineral industry, while another nonlinear impact distance...
Geographical named entity matching, a crucial step in address encoding, aims to enhance resolution accuracy through the precise identification and linkage of geographical data. However, existing approaches tend ignore spatial information entities, leading misclassification. Drawing on human process searching for addresses, this study proposes multi-objective learning model GNEMM that integrates semantic entities. To further mimic cognitive during search, it incorporates Retrieval-Augmented...
Abstract Loop I/North Polar Spur (NPS) is the giant arc structure above Galactic plane observed at radio wavelengths (≲10 GHz). There has been long-standing debate about its origin. While many people believe that it consists of nearby supernova remnants (SNRs), some others consider as a bubble close to Center (GC), associated with Fermi Bubble and eROSITA X-ray bubble. At ultralong (wavelength ≳10 m or frequency ≲30 MHz), particularly below ∼10 MHz, free–free absorption signal by diffuse...
Abstract With recent Ly α forest data from BOSS and XQ-100, some studies suggested that the lower mass limit on fuzzy dark matter (FDM) particles is lifted up to <?CDATA ${10}^{-21}\,\mathrm{eV}$?> . However, such a was obtained by ΛCDM simulations with FDM initial condition quantum pressure (QP) not taken into account, which could have generated non-trivial effects in large-scale structures. We investigate QP cosmological systematically, find leads further suppression of power spectrum at...
The measurement of diffuse 21-cm radiation from the hyperfine transition neutral hydrogen (HI signal) in different redshifts is an important tool for modern cosmology. However, detecting this faint signal with non-cryogenic receivers single-dish telescopes a challenging task. BINGO (Baryon Acoustic Oscillations Integrated Neutral Gas Observations) radio telescope instrument designed to detect baryonic acoustic oscillations (BAOs) cosmological HI signal, redshift interval $0.127 \le z 0.449$....
The BINGO telescope was designed to measure the fluctuations of 21-cm radiation arising from hyperfine transition neutral hydrogen and aims Baryon Acoustic Oscillations (BAO) such fluctuations, therefore serving as a pathfinder future deeper intensity mapping surveys. requirements for Phase 1 projects consider large reflector system (two 40 m-class dishes in crossed-Dragone configuration), illuminating focal plane with 28 horns sky two circular polarisations drift scan mode produce...
In recent years, the interaction between dark matter (DM) and energy has become a topic of interest in cosmology. Interacting matter-dark (IDE) models have substantial impact on formation cosmological large-scale structures, which serve as background for DM halo evolution. This can be examined through shape spin orientation halos numerical simulations incorporating IDE effects. our work, we use N-body simulation pipeline ME-GADGET to simulate study models. We found that where transfers into...
Purpose The purpose of this study was to investigate the effects aging time on microstructure, mechanical properties and fracture morphology Cu/Zn160%SAC0307/Al solder joints produced through solid-state bonding. Design/methodology/approach Zn particles with a size 1 µm Sn-0.3Ag-0.7Cu (SAC0307) ranging from 20 38 were used achieve Cu/Al micro-connections using ultrasonic assistance at temperature 180 °C, followed by treatment 150 °C enhance quality joints. Scanning electron microscopy for...
Abstract The cosmic 21 cm signal serves as a crucial probe for studying the evolutionary history of Universe. However, detecting poses significant challenges due to its extremely faint nature. To mitigate interference from Earth’s radio frequency (RFI), ground and ionospheric effects, Discovering Sky at Longest Wavelength (DSL) project will deploy constellation satellites in Lunar orbit, with high-frequency daughter satellite tasked global dawn reionization era (CD/EoR).We intend employ...
Abstract Peaked-spectrum (PS) sources exhibit turnover characteristics in their broad radio spectra. However, the mechanism underlying this phenomenon remains elusive. The two most common hypotheses are synchrotron self-absorption (SSA) and free–free absorption (FFA). By incorporating multiple scenarios, we propose a multimechanism hybrid model, which aligns well with current observational data provides good physical explanation. Using from GLEAM survey, identified sample of 4315 peak...
Analysis of regional and teleseismic broadband body waves long-period surface from the 1989 Loma Prieta earthquake demonstrates that a fairly simple average fault model explains most characteristics seismic wave radiation over broad period range (1 to 300 sec), but there are some systematic period-dependent not yet understood. Determinations preferred point source focal mechanism consistent for different waves, as long optimal source-time functions depths chosen each wavetype. The major...
Context. The 21 cm line of neutral hydrogen (H I ) opens a new avenue in our exploration the structure and evolution Universe. It provides complementary data to current large-scale (LSS) observations with different systematics, thus it will be used improve understanding Λ cold dark matter (ΛCDM) model. This ultimately constrain cosmological models, attack unresolved tensions, test paradigm. Among several radio surveys designed measure this line, BINGO is single-dish telescope mainly detect...