A5101648815- Cosmology and Gravitation Theories
- Radio Astronomy Observations and Technology
- Geophysics and Gravity Measurements
- Dark Matter and Cosmic Phenomena
- Pulsars and Gravitational Waves Research
- Galaxies: Formation, Evolution, Phenomena
- Particle physics theoretical and experimental studies
- Solar and Space Plasma Dynamics
- Astrophysics and Cosmic Phenomena
- High-Energy Particle Collisions Research
- Particle Detector Development and Performance
- Advanced Differential Geometry Research
- Computational Physics and Python Applications
- Gamma-ray bursts and supernovae
- Statistical and numerical algorithms
- High-pressure geophysics and materials
- Soil Moisture and Remote Sensing
- Stellar, planetary, and galactic studies
- Seismic Waves and Analysis
- Ionosphere and magnetosphere dynamics
- Quantum Chromodynamics and Particle Interactions
- Black Holes and Theoretical Physics
- GNSS positioning and interference
- Astrophysical Phenomena and Observations
- Superconducting and THz Device Technology
Peking University
2022-2025
Peking University Third Hospital
2022-2025
Chongqing Jiaotong University
2025
Chinese Academy of Sciences
2013-2024
Anhui University
2021-2024
University of Copenhagen
2018-2024
Institute of High Energy Physics
2014-2024
Guangzhou Institutes of Biomedicine and Health
2023-2024
Purple Mountain Observatory
2019-2023
University of Science and Technology of China
2023
We investigate possible imprints of galactic foreground structures such as the "radio loops" in derived maps cosmic microwave background. Surprisingly, there is evidence for these not only at radio frequencies through their synchrotron radiation, but also where emission by dust dominates. This suggests mechanism magnetic dipole radiation from grains enriched metallic iron or ferrimagnetic molecules. new we have identified present high latitudes, and potentially dominates over expected B-mode...
The DArk Matter Particle Explorer (DAMPE), a high energy cosmic ray and $\gamma$-ray detector in space, has recently reported the new measurement of total electron plus positron flux between 25 GeV 4.6 TeV. A spectral softening at $\sim0.9$ TeV tentative peak $\sim1.4$ have been reported. We study physical implications DAMPE data this work. presence break significantly tightens constraints on model parameters to explain electron/positron excesses. can either be explained by maximum...
We investigate both (pseudo)scalar mesons and diquarks in the presence of external magnetic field framework two-flavored Nambu--Jona-Lasinio (NJL) model, where are constructed by infinite sum quark-loop chains using random phase approximation. The polarization function is calculated to leading order $1/N_c$ expansion taking quark propagator Landau level representation. systematically masses behaviors scalar $\sigma$ meson, neutral charged pions as well diquarks, with respect strength at...
We study the chiral phase transition in presence of chemical potential ${\ensuremath{\mu}}_{5}$ using two-flavor Nambu--Jona-Lasinio model. In particular, we analyze reason why one can obtain two opposite behaviors critical temperature as a function framework different regularization schemes. compare modifications condensate and due to schemes, analytically numerically. Finally, find that, for conventional hard-cutoff scheme, increasing dependence on is an artifact, which caused by fact that...
Abstract AliCPT is the first Chinese cosmic microwave background (CMB) experiment which will make most precise measurements of CMB polarization in northern hemisphere. The key science goal for detection primordial gravitational waves (PGWs). It well known that an epoch inflation, very early universe, can produce PGWs, leave imprint on form odd parity B -mode polarization. In this work, we study performance component separation and parameter estimation pipelines context constraining value...
Abstract It is well known that multiple Galactic thermal dust emission components may exist along the line of sight, but a single-component approximation still widely used, since full multicomponent estimation requires large number frequency bands are only available with future experiments. In light this, we present reliable, quantitative, and sensitive criterion to test goodness all kinds estimations. This can not give definite answer quality current approximations also help determine...
Dissolved oxygen (DO) is a vital water quality index influencing biological processes in aquatic environments. Accurate modeling of DO levels crucial for maintaining ecosystem health and managing freshwater resources. To this end, the present study contributes Bayesian-optimized explainable machine learning (ML) model to reveal dynamics predict concentrations. Three ML models, support vector regression (SVR), tree (RT), boosting ensemble, coupled with Bayesian optimization (BO), are employed...
Web recommendations provide personalized items from massive catalogs for users, which rely heavily on retrieval stages to trade off the effectiveness and efficiency of selecting a small relevant set billion-scale candidates in online digital platforms. As one largest Chinese search engine news feed providers, Baidu resorts Deep Neural Network (DNN) graph-based Approximate Nearest Neighbor Search (ANNS) algorithms accurate relevance estimation efficient items. However, current at fails...
To date, the LIGO collaboration has detected three gravitational wave (GW) events appearing in both its Hanford and Livingston detectors. In this article we reexamine data with regard to correlations between two With special focus on GW150914, report detector noise which, at time of event, happen be maximized for same lag as that found event itself. Specifically, analyze calibration lines vicinity 35 Hz well residual after subtraction best-fit theoretical templates. The other events,...
In the observation of cosmic microwave background (CMB) polarization, ``$EB$ leakage'' refers to artificial $B$-mode signal coming from leakage $E$-mode when part sky is unavailable or excluded. Correction such a one preconditions for detecting primordial gravitational waves via CMB signal. this work, we design two independent methods correcting $EB$ directly in pixel domain using standard definitions $E$- and $B$-modes. The give consistent results, both are fast easy implement. Tests on...
<strong>Publisher's Note</strong>: This paper, originally published on 22 December 2020, was replaced with a corrected/revised version 12 March 2021. If you downloaded the original PDF but are unable to access revision, please contact SPIE Digital Library Customer Service for assistance. AliCPT-1 is first CMB degree scale polarimeter be deployed Tibetan plateau at 5,250m asl. 95/150GHz 72cm aperture, two lens refracting telescope cooled down 4K. Alumina lenses image 636mm wide focal plane....
Teratoma, due to its remarkable ability differentiate into multiple cell lineages, is a valuable model for studying human embryonic development. The similarity of the gene expression and chromatin accessibility patterns in these cells those observed vivo further underscores potential as research tool. Notably, teratomas derived from naïve (pre-implantation epiblast-like) pluripotent stem (PSCs) have larger diversity contain extraembryonic making them more suitable study developmental...
Abstract The Forbush decrease (FD) represents the rapid of intensities charged particles accompanied with coronal mass ejections or high-speed streams from holes. It has been mainly explored ground-based neutron monitor network, which indirectly measures integrated all species cosmic rays by counting secondary neutrons produced interaction between atmospheric atoms and rays. space-based experiments can resolve but energy ranges are limited relatively small acceptances except for most...
We propose a blind, template-free method for the extraction of common signal between Hanford and Livingston detectors apply it especially to GW150914 event. construct log-likelihood that maximizes cross-correlation each detector minimizes residuals. The reliability this is tested using simulations with an injected signal. Finally, our used assess quality theoretical gravitational wave templates GW150914.
We present a simplified method for the extraction of meaningful signals from Hanford and Livingston 32 second data GW150914 event made publicly available by LIGO collaboration, demonstrate its ability to reproduce collaboration's own results quantitatively given assumption that all narrow peaks in power spectrum are consequence physically uninteresting can be removed. After clipping these return time domain, is readily distinguished broadband background noise. This simple technique allows us...
We study the degeneracy of theoretical gravitational waveforms for binary black hole mergers using an aligned-spin effective-one-body model. After appropriate truncation, bandpassing, and matching, we identify regions in mass–spin parameter space containing similar to template proposed GW150914, with masses m1 = 36+5−4 M⊙ m2 29+4−4 M⊙, cross-correlation coefficient as a measure similarity between waveforms. Remarkably high cross-correlations are found across broad space. The associated...
A remarkable similarity between the large-scale non-Gaussian pattern of cosmic microwave background (CMB) temperatures obtained by Wilkinson Microwave Anisotropy Probe (WMAP) mission and distribution feature observation numbers is noted. Motivated from such a similarity, in this work we check WMAP data for correlation pixel temperature t number N. Systematic effect imbalance differential significant t-N magnitude, non-Gaussianity north-south asymmetry are found. Our results indicate that,...
We study the problem of EB-leakage that is associated with incomplete polarized CMB sky. In blind case assumes no additional information about statistical properties and amplitudes signal from missing sky region, we prove recycling method (Liu et al. 2018) gives unique best estimate EB-leakage. Compared to previous method, our reduces uncertainties in BB power spectrum due by more than one order magnitude most interesting domain multipoles, where ℓ between 100 200. This work also provides a...
The cosmic microwave background (CMB) temperature maps published by the Wilkinson Microwave Anisotropy Probe (WMAP) team are found to be inconsistent with differential time-ordered data (TOD), from which reconstructed. inconsistency indicates that there is a serious problem in map making routine of WMAP team, and it necessary reprocess data. We develop self-consistent software package map-making power spectrum estimation independently team. Our passes variety tests. New CMB then...
We reexamine the results presented in [1] which properties of noise residuals 40 ms chirp domain GW150914 were investigated. This paper confirmed presence strong (i.e., about 0.80) correlations between residual Hanford and Livingston detectors as previously seen by [2] when using a numerical relativity template given [3]. It was also shown [4] that so-called maximum likelihood can reduce these statistically significant cross-correlations. Here, we demonstrate reduction correlation...