A5053710006- Astrophysics and Star Formation Studies
- Stellar, planetary, and galactic studies
- Molecular Spectroscopy and Structure
- Atmospheric Ozone and Climate
- Astro and Planetary Science
- Galaxies: Formation, Evolution, Phenomena
- Rock Mechanics and Modeling
- Tunneling and Rock Mechanics
- Drilling and Well Engineering
- Astronomical Observations and Instrumentation
- Astrophysics and Cosmic Phenomena
- Astronomy and Astrophysical Research
- Advanced materials and composites
- Grouting, Rheology, and Soil Mechanics
- Radio Astronomy Observations and Technology
- Astrophysical Phenomena and Observations
- Advanced Combustion Engine Technologies
- Spectroscopy and Laser Applications
- GaN-based semiconductor devices and materials
- Solar and Space Plasma Dynamics
- Advanced Chemical Physics Studies
- Gamma-ray bursts and supernovae
- biodegradable polymer synthesis and properties
- Geotechnical Engineering and Analysis
- Carbon Nanotubes in Composites
Xinjiang Astronomical Observatory
2016-2025
Chinese Academy of Sciences
2016-2025
University of Chinese Academy of Sciences
2007-2025
China Railway Group (China)
2018-2024
University of Science and Technology of China
2021
Nanjing Forestry University
2015-2016
Nanjing Institute of Technology
2009-2016
Southwest Jiaotong University
2016
Nanjing Institute of Astronomical Optics & Technology
2015
Chengdu University of Technology
2014
Real-time atomic force microscopy observation was carried out during crystallization in thin films of chiral poly(R-3-hydroxybutyrate-co-R-3-hydroxyhexanoate) copolymer, and the development details single lamellae banded spherulites are revealed for first time. The exhibit complicated growth behaviors: twisting, bending, backward growth, branching. continuously twist to show alternating edge-on flat-on views along radii spherulites. Giant screw dislocations bring forth birth new lamellae....
Abstract Most protostars have luminosities that are fainter than expected from steady accretion over the protostellar lifetime. The solution to this problem may lie in episodic mass accretion—prolonged periods of very low punctuated by short bursts rapid accretion. However, timescale and amplitude for variability at phase is almost entirely unconstrained. In A James Clerk Maxwell Telescope/SCUBA-2 Transient Survey Protostars Nearby Star-forming Regions, we monitoring monthly with SCUBA-2...
Massive star-forming regions with observed infall motions are good sites for studying the birth of massive stars. In this paper, 405 compact sources have been extracted from APEX Telescope Large Area Survey Galaxy (ATLASGAL) that also in Millimetre Astronomy Legacy Team 90 GHz (MALT90) survey during Years 1 and 2. These observations complemented Spitzer GLIMPSE/MIPSGAL mid-IR data to help classify elected clumps into three evolutionary stages: pre-stellar, proto-stellar UCHII regions. The...
We report 850~$\mu$m dust polarization observations of a low-mass ($\sim$12 $M_{\odot}$) starless core in the $\rho$ Ophiuchus cloud, C, made with POL-2 instrument on James Clerk Maxwell Telescope (JCMT) as part JCMT B-fields In STar-forming Region Observations (BISTRO) survey. detect an ordered magnetic field projected plane sky core. The across $\sim$0.1~pc shows predominant northeast-southwest orientation centering between $\sim$40$^\circ$ to $\sim$100$^\circ$, indicating that is well...
Abstract The presence of complex organic molecules (COMs) in the interstellar medium is great interest since it may link to origin and prevalence life universe. Aiming investigate occurrence COMs their possible origins, we conducted a chemical census toward sample protostellar cores as part Atacama Large Millimeter/submillimeter Array Survey Orion Planck Galactic Cold Clumps project. We report detection 11 hot corino sources, which exhibit compact emissions from warm abundant COMs, among 56...
ABSTRACT Cellulose nanocrystals (CNCs) were used as a sustainable additive to improve the hydrophilicity, permeability, antifouling, and mechanical properties of blend membranes. Different CNC loadings (0–1.2 wt %) in cellulose acetate (CA) membranes studied. The prepared by phase‐inversion process, their chemical structure morphological characterized attenuated total reflectance–Fourier transform infrared spectroscopy, scanning electron microscopy, porosity, mean pore size contact angle...
Abstract We have obtained sensitive dust continuum polarization observations at 850 μ m in the B213 region of Taurus using POL-2 on SCUBA-2 James Clerk Maxwell Telescope as part B -fields STar-forming Region Observations (BISTRO) survey. These allow us to probe magnetic field ( -field) high spatial resolution (∼2000 au or ∼0.01 pc 140 pc) two protostellar cores (K04166 and K04169) one prestellar core (Miz-8b) that lie within filament. Using Davis–Chandrasekhar–Fermi method, we estimate...
Abstract We present an unbiased λ 3 mm spectral line survey (between 84.5 and 115.8 GHz), conducted by the Purple Mountain Observatory 13.7 m radio telescope, together with updated modeling results, toward carbon-rich asymptotic giant branch star IRC+10216 (CW Leo). A total of 75 lines (96 transitions) are detected, identified to arise from 19 molecules: C 2 H, l -C 4 CN, N, HC 5 HCN, HNC, CH MgNC, CO, c H , SiC SiO, SiS, CS, S, their isotopologues. Among them, one molecular emission (H 13...
Abstract We conducted an ammonia survey targeting 217 sources from the BGPS v1.0 using Nanshan 26 m radio telescope, focusing on $\rm NH_3$(1,1) and (2,2) lines, selecting based criteria that their 1.1 mm fluxes are greater than 5 Jy they observable with telescope at Xinjiang Astronomical Observatory. successfully detected 188 (86.6%) of our sources. These span a galactic longitude range 1.2○ to 192.6○ reside in local, Perseus, Saggitarius-Carina, Scutum-Centaurus Norma spiral arms between...
In this work, we aim to characterize high-mass clumps with infall motions. We selected 327 from the Millimetre Astronomy Legacy Team 90-GHz survey, and identified 100 candidates. Combined results of He et al., obtained a sample 732 clumps, including 231 massive candidates 501 where is not detected. Objects in our were classified as pre-stellar, proto-stellar, H ii or photodissociation region (PDR). The detection rates PDR stages are 41.2 per cent, 36.6 30.6 cent 12.7 respectively. have...
We aim to directly determine the kinetic temperature and spatial density with formaldehyde for $\sim$100 brightest ATLASGAL-selected clumps at 870 $\mu$m representing various evolutionary stages of high-mass star formation. Ten transitions ($J$ = 3-2 4-3) ortho- para-H$_2$CO near 211, 218, 225, 291 GHz were observed APEX 12 m telescope. Using non-LTE models RADEX, we derive gas using measured p-H$_2$CO 3$_{21}$-2$_{20}$/3$_{03}$-2$_{02}$, 4$_{22}$-3$_{21}$/4$_{04}$-3$_{03}$,...
Abstract Prestellar cores are self-gravitating dense and cold structures within molecular clouds where future stars born. They expected, at the stage of transitioning to protostellar phase, harbor centrally concentrated (sub)structures that will seed formation a new star or binary/multiple stellar systems. Characterizing this critical evolution is key our understanding formation. In work, we report detection high-density on thousand-astronomical-unit (au) scale in sample prestellar cores....
Abstract We report the detection of ordered alignment between magnetic field and kpc-scale bubbles in nearby spiral galaxy, NGC 628. Applying Velocity Gradient Technique on CO spectroscopic data from ALMA-PHANGS, 628 is measured at scale 191 pc (∼4″). The large-scale oriented parallel to arms curves around galactic bubble structures mid-infrared emission observed by James Webb Space Telescope. A total 21 have been identified edges with scales over 300 pc, which includes two structures. These...
We mapped the kinetic temperature structure of Orion molecular cloud 1 with para-H2CO(303-202, 322-221, and 321-220) using APEX 12m telescope. This is compared temperatures derived from ratio NH3(2,2)/(1,1) inversion lines dust emission. Using RADEX non-LTE model, we derive gas modeling measured averaged line ratios para-H2CO 322-221/303-202 321-220/303-202. The are warm, ranging 30 to >200 K an average 62 at a spatial density 10$^5$ cm$^{-3}$. These higher than those obtained CH3CCH(6-5) in...
ABSTRACT Microcrystalline cellulose (MCC) and its oxidized product dialdehyde (DAC) were introduced as the reinforcing filler in epoxidized soybean oil (ESO) thermosetting polymer. The composites comprising up to 25 wt % fillers obtained via a solution casting. effects of evaluated by microstructure analysis, dynamic mechanical tensile thermal stability tests. results showed that at same concentration, DAC led higher stretching strength, modulus, break elongation than MCC. 5 loading ESO...
We present and analyze observations of polarized dust emission at 850 $\mu$m towards the central 1 pc $\times$ hub-filament structure Monoceros R2 (Mon R2). The data are obtained with SCUBA-2/POL-2 on James Clerk Maxwell Telescope (JCMT) as part BISTRO (B-fields in Star-forming Region Observations) survey. orientations magnetic field follow spiral Mon R2, which well-described by an axisymmetric model. estimate turbulent component using angle difference between our best-fit model underlying...
The Large Magellanic Cloud (LMC), the closest star forming galaxy with low metallicity, provides an ideal laboratory to study formation in such environment. classical dense molecular gas thermometer NH3 is rarely available a metallicity environment because of photoionization and lack nitrogen atoms. Our goal directly measure kinetic temperature formaldehyde toward six star-forming regions LMC. Three rotational transitions para-H2CO near 218 GHz were observed APEX 12m telescope Those data are...
Context. Infrared dark clouds (IRDCs) are ubiquitous in the Milky Way, yet they play a crucial role breeding newly-formed stars. Aims. With aim of further understanding dynamics, chemistry, and evolution IRDCs, we carried out multi-wavelength observations on small sample. Methods. We performed new with IRAM 30 m CSO 10.4 telescopes, tracers ${\rm HCO^+}$, HCN, N_2H^+}$, C^{18}O}$, DCO$^+$, SiO, DCN toward six IRDCs G031.97+00.07, G033.69-00.01, G034.43+00.24, G035.39-00.33, G038.95-00.47,...
Abstract Polyethylene (PE) chains grafted onto the sidewalls of SWCNTs (SWCNT‐ g ‐PE) were successfully synthesized via ethylene copolymerization with functionalized single‐walled carbon nanotubes (f‐SWCNTs) catalyzed by rac ‐(en)(THInd) 2 ZrCl /MAO. Here f‐SWCNTs, in which α‐alkene groups chemically linked on SWCNTs, Prato reaction. The composition and microstructure SWCNT‐ ‐PE characterized means 1 H NMR, Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, thermogravimetric...
In this work, AlGaN-based metal–semiconductor–metal solar-blind ultraviolet photodetectors (PDs) with low dark current were fabricated on sapphire substrates. both front- and back-illumination operation modes, the PDs exhibited sharp photoresponse cutoffs at ∼280 nm solar-blind/ultraviolet rejection ratios of more than 103. The quantum efficiency back-illuminated PD was observed to generally be higher that front-illuminated PD. Nevertheless, very bias range, greater photoresponsivity....
Grouting is an important process for stability control of unfavourable geology. A multi-parameter grouting monitoring device was designed to monitor pump pressure, inlet density, outlet electrical resistance and osmotic pressure. On the basis multi-source information, this paper presents experimental study colloidal nano-silica into over-broken coal mass, which verified by percolation mechanics theory numerical simulation simultaneously. The porosity permeability injected sample were 15.34%...