Tianyue Chen
A5040709395- Radio Astronomy Observations and Technology
- Galaxies: Formation, Evolution, Phenomena
- Astrophysics and Cosmic Phenomena
- Pulsars and Gravitational Waves Research
- Cosmology and Gravitation Theories
- Gamma-ray bursts and supernovae
- Geophysics and Gravity Measurements
- Astrophysical Phenomena and Observations
- Fatigue and fracture mechanics
- Remote Sensing in Agriculture
- Remote Sensing and LiDAR Applications
- earthquake and tectonic studies
- Medical Imaging Techniques and Applications
- Carbon and Quantum Dots Applications
- Consumer Perception and Purchasing Behavior
- Quantum Dots Synthesis And Properties
- Astronomy and Astrophysical Research
- Nanocluster Synthesis and Applications
- Advanced Fluorescence Microscopy Techniques
- Particle accelerators and beam dynamics
- Advanced Frequency and Time Standards
- High Temperature Alloys and Creep
- Health, Environment, Cognitive Aging
- Caching and Content Delivery
- Non-Invasive Vital Sign Monitoring
École Polytechnique Fédérale de Lausanne
2022-2024
Massachusetts Institute of Technology
2019-2023
Centers for Disease Control and Prevention
2023
Nanjing Forestry University
2023
Ministry of Industry and Information Technology
2023
Northwestern Polytechnical University
2022-2023
University of Connecticut
2022
University of Manchester
2015-2021
SKA Observatory
2019
Lurie Children's Hospital
2002
We present a catalog of 536 fast radio bursts (FRBs) detected by the Canadian Hydrogen Intensity Mapping Experiment Fast Radio Burst (CHIME/FRB) Project between 400 and 800 MHz from 2018 July 25 to 2019 1, including 62 18 previously reported repeating sources. The represents first large sample, repeaters non-repeaters, observed in single survey with uniform selection effects. This facilitates comparative absolute studies FRB population. show that apparent non-repeaters have sky locations...
The Canadian Hydrogen Intensity Mapping Experiment (CHIME) is a drift scan radio telescope operating across the 400-800 MHz band. CHIME located at Dominion Radio Astrophysical Observatory near Penticton, BC Canada. instrument designed to map neutral hydrogen over redshift range 0.8 2.5 constrain expansion history of Universe. This goal drives design features instrument. consists four parallel cylindrical reflectors, oriented north-south, each 100 m $\times$ 20 and outfitted with 256 element...
We present a detection of 21-cm emission from large-scale structure (LSS) between redshift 0.78 and 1.43 made with the Canadian Hydrogen Intensity Mapping Experiment (CHIME). Radio observations acquired over 102 nights are used to construct maps which foreground filtered stacked on angular spectral locations luminous red galaxies (LRG), line (ELG), quasars (QSO) eBOSS clustering catalogs. find decisive evidence for when stacking all three tracers LSS, logarithm Bayes Factor equal 18.9 10.8...
In this study, the high cycle and very fatigue behavior of GH4169 superalloy was investigated. The results tests demonstrated that failures in regime were initiated from material surface, whereas had two competing modes crack initiation: surface internal. fracture analysis revealed a quasi-cleavage mode with facets for internal initiation. Additionally, electron backscatter diffraction(EBSD) indicated dislocations located at twin boundaries preferentially activated under cyclic loading,...
ABSTRACT The upcoming Square Kilometre Array Observatory will produce images of neutral hydrogen distribution during the epoch reionization by observing corresponding 21-cm signal. However, signal be subject to instrumental limitations such as noise and galactic foreground contamination that pose a challenge for accurate detection. In this study, we present SegU-Net v2 framework, an enhanced version our convolutional neural network, built identify ionized regions in contaminated with...
We present a Radio Recombination Line (RRL) survey of the Galactic Plane from HI Parkes All-sky Survey and associated Zone Avoidance survey, which mapped region l=196degr -- 0degr --52degr |b| < 5degr at 1.4 GHz 14.4 arcmin resolution. combine three RRLs, H168$\alpha$, H167$\alpha$, H166$\alpha$ to derive fully sampled maps diffuse ionized emission along inner plane. The velocity information, resolution 20 km/s, allows us study spatial distribution gas compare it with that molecular gas, as...
Cosmology has entered an era where the experimental limitations are not due to instrumental sensitivity but instead inherent systematic uncertainties in instrumentation and data analysis methods. The field of HI intensity mapping (IM) is still maturing, however early attempts already systematics limited. One such limitation 1/f noise, which largely originates within manifests as multiplicative gain fluctuations. To date there been little discussion about possible impact noise on upcoming...
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...
21cm intensity mapping is a novel approach aimed at measuring the power spectrum of density fluctuations and deducing cosmological information, notably from Baryonic Acoustic Oscillations (BAO). We give an update on progress BAO Integrated Neutral Gas Observations (BINGO) which single dish project. First we explain basic ideas behind concept before updating instrument design for BINGO. also outline survey plan to make its projected science output including estimates parameters.
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 prevalence of iron-deficiency anemia in children has decreased owing to the provision iron-containing infant formula and cereal food vouchers enrolled Special Supplemental Nutrition Program for Women, Infants, Children (WIC).To determine changes status receiving WIC supplementation.Retrospective cross-sectional longitudinal analysis information on participants. Two definitions were considered separately: Anemia1 Anemia2, latter using a more stringent definition avoid...
We investigate the impact of $1/f$ noise on cosmology for an intensity mapping survey with SKA1-MID Band\,1 and Band\,2. use a Fisher matrix approach to forecast constraints cosmological parameters under influence noise, adopting semi-empirical model from earlier work, which results residual spectrum after applying component separation algorithm remove smooth spectral components. Without projected are $4\%$ $w_0$, $1\%$ $h$, $2\%$ $b_{\rm HI}$ using Band\,1+\emph{Planck}, $3\%$ $0.5\%$...
The low-frequency component of the upcoming Square Kilometre Array Observatory (SKA-Low) will be sensitive enough to construct 3D tomographic images 21-cm signal distribution during reionization. However, foreground contamination poses challenges for detecting this signal, and image recovery heavily rely on effective mitigation methods. We introduce \texttt{SERENEt}, a deep-learning framework designed recover from SKA-Low's foreground-contaminated observations, enabling detection ionized...
We discuss the detectability of large-scale HI intensity fluctuations using FAST telescope. present forecasts for accuracy measuring Baryonic Acoustic Oscillations and constraining properties dark energy. The $19$-beam L-band receivers ($1.05$--$1.45$ GHz) can provide constraints on matter power spectrum energy equation state parameters ($w_{0},w_{a}$) that are comparable to BINGO CHIME experiments. For one year integration time we find optimal survey area is $6000\,{\rm deg}^2$. However,...
Abstract We establish that for PSR B0031−07 the orthogonal polarization modes switch at a single pulse level synchronously with periodic drifting subpulses seen in total intensity. There are only four other pulsars known which this phenomenon is observed. unique as it source group has multiple stable drift modes. For both visible our observing frequency centered 1369 MHz, modulation of synchronous subpulses. In one modes, discontinuity pattern properties occurs halfway through pulse,...
Residual foreground contamination in cosmic microwave background (CMB) maps, such as the residual from thermal Sunyaev–Zeldovich (SZ) effect direction of galaxy clusters, can bias cross-correlation measurements between CMB and large-scale structure optical surveys. It is thus essential to quantify those residuals and, if possible, null out SZ cluster maps. We for first time amount released Planck 2015 maps through (i) stacking (ii) computation power spectra Sloan Digital Sky Survey-IV data....
We present a detection of 21-cm emission from large-scale structure (LSS) between redshift 0.78 and 1.43 made with the Canadian Hydrogen Intensity Mapping Experiment (CHIME). Radio observations acquired over 102 nights are used to construct maps which foreground filtered stacked on angular spectral locations luminous red galaxies (LRG), line (ELG), quasars (QSO) eBOSS clustering catalogs. find decisive evidence for when stacking all three tracers LSS, logarithm Bayes Factor equal 18.9 10.8...