A5064101951- Astrophysics and Star Formation Studies
- Stellar, planetary, and galactic studies
- Galaxies: Formation, Evolution, Phenomena
- Gamma-ray bursts and supernovae
- Molecular Spectroscopy and Structure
- Astrophysics and Cosmic Phenomena
- Astronomical Observations and Instrumentation
- Astronomy and Astrophysical Research
- Geophysics and Gravity Measurements
- Astro and Planetary Science
- Radio Astronomy Observations and Technology
- Atmospheric Ozone and Climate
- Pulsars and Gravitational Waves Research
- Advanced Combustion Engine Technologies
- Sparse and Compressive Sensing Techniques
- Cosmology and Gravitation Theories
- Astrophysical Phenomena and Observations
- Phase Equilibria and Thermodynamics
- Solar and Space Plasma Dynamics
- Spectroscopy and Laser Applications
- Dark Matter and Cosmic Phenomena
- High-pressure geophysics and materials
- Glioma Diagnosis and Treatment
- Methane Hydrates and Related Phenomena
- Advanced Image and Video Retrieval Techniques
Chinese Academy of Sciences
2014-2025
National Astronomical Observatories
2016-2025
Max Planck Institute for Radio Astronomy
2018-2023
Capital Institute of Pediatrics
2023
University of Hertfordshire
2018
University of Chinese Academy of Sciences
2016-2018
Xinjiang Astronomical Observatory
2014
University of California, Berkeley
2009-2013
l1-minimization refers to finding the minimum l1-norm solution an underdetermined linear system [Formula: see text]. Under certain conditions as described in compressive sensing theory, is also sparsest solution. In this paper, we study speed and scalability of its algorithms. particular, focus on numerical implementation a sparsity-based classification framework robust face recognition, where sparse representation sought recover human identities from high-dimensional facial images that may...
Large language models (LLMs) have demonstrated remarkable performance on a variety of natural tasks based just few examples instructions, reducing the need for extensive feature engineering. However, most powerful LLMs are closed-source or limited in their capability languages other than English. In this technical report, we present Baichuan 2, series large-scale multilingual containing 7 billion and 13 parameters, trained from scratch, 2.6 trillion tokens. 2 matches outperforms open-source...
ATLASGAL is a 870-mircon dust survey of 420 square degrees the inner Galactic plane and has been used to identify ~10 000 dense molecular clumps. Dedicated follow-up observations complementary surveys are characterise physical properties these clumps, map their distribution investigate evolutionary sequence for high-mass star formation. The analysis data ongoing: we present an up-to-date version catalogue. We have classified 5007 clumps into four stages (quiescent, protostellar, young...
Surveys of the Milky Way at various wavelengths have changed our view star formation in Galaxy considerably recent years. In this paper we give an overview GLOSTAR survey, a new survey covering large parts (145 square degrees) northern Galactic plane using Karl G. Jansky Very Large Array (JVLA) frequency range 4-8 GHz and Effelsberg 100-m telescope. This provides for first time radio all angular scales down to 1.5 arcsecond, similar complementary near-IR mid-IR galactic surveys. We outline...
Abstract Only a handful of massive starless core candidates have been discovered so far, but none them fully confirmed. Within the MM1 clump in filamentary infrared dark cloud G34.43+0.24 that was covered by Atacama Large Millimeter/submillimeter Array (ALMA) ATOMS survey at Band 3 (∼2″, 6000 au) and ALMA-QUARKS 6 (∼0.″3, 900 au), two prestellar MM1-C E1 with masses 71 20 M ⊙ radii 2100–4400 au were discovered. The cores show no obvious sign star formation activities. In particular, is very...
We introduce Baichuan-Omni-1.5, an omni-modal model that not only has understanding capabilities but also provides end-to-end audio generation capabilities. To achieve fluent and high-quality interaction across modalities without compromising the of any modality, we prioritized optimizing three key aspects. First, establish a comprehensive data cleaning synthesis pipeline for multimodal data, obtaining about 500B (text, audio, vision). Second, audio-tokenizer (Baichuan-Audio-Tokenizer) been...
The warm neutral medium (WNM) was thought to be subsonically/transonically turbulent, and it lacks a network of intertwined filaments that are commonly seen in both molecular clouds cold (CNM). Here, we report HI~21 cm line observations very-high-velocity (-330 km s$^{-1}$ $<V_{\rm LSR}<$ -250 s$^{-1}$) cloud (VHVC), using the Five-hundred-meter Aperture Spherical radio Telescope (FAST) with unprecedented resolution sensitivity. For first time, such VHVC is clearly revealed supersonic WNM...
Abstract We present high-frequency (18–24 GHz) radio continuum observations towards 335 methanol masers, excellent signposts for young, embedded high-mass protostars. These complete the search hypercompact H ii (HC ii) regions young star-forming clumps within fourth quadrant of Galactic plane. HC are earliest observable signatures emission from stars ionizing their surroundings, though rarity and short lifetimes make them challenging to study. have observed maser sites at 20-arcsec...
We have undertaken the largest survey for outflows within Galactic Plane using simultaneously observed 13CO and C18O data. 325 out of a total 919 ATLASGAL clumps data suitable to identify outflows, 225 (69+-3%) them show high velocity outflows. The with detected significantly higher clump masses (M_{clump}), bolometric luminosities (L_{bol}), luminosity-to-mass ratios (L_{bol}/M_{clump}) peak H_2 column densities (N_{H_2}) compared those without Outflow activity has been youngest quiescent...
Context. The properties of the population Galactic supernova remnants (SNRs) are essential to our understanding dynamics interstellar medium (ISM) in Milky Way. However, completeness catalog SNRs is expected be only ~30%, with on order 700 yet detected. Deep interferometric radio continuum surveys plane help rectifying this apparent deficiency by identifying low surface brightness and compact that have not been detected previous surveys. routinely confused H II regions, which can similar...
Class II methanol (CH$_{3}$OH) masers are amongst the clearest signposts of recent high-mass star formation (HMSF). A complete catalogue outlines distribution in Galaxy, number young star-forming cores, and physical conditions their environment. The Global View on Star Formation (GLOSTAR) survey, which is a blind survey radio regime 4$-$8 GHz, maps Galactic mid-plane continuum, 6.7 GHz line, 4.8 formaldehyde several recombination lines. We present analysis observations CH$_{3}$OH maser...
The latest generation of Galactic-plane surveys is enhancing our ability to study the effects galactic environment upon process star formation. We present first data from CO Heterodyne Inner Milky Way Plane Survey 2 (CHIMPS2). CHIMPS2 a survey that will observe Galaxy, Central Molecular Zone (CMZ), and section Outer Galaxy in $^{12}$CO, $^{13}$CO, C$^{18}$O $(J = 3\rightarrow2)$ emission with Array Receiver Program on James Clerk Maxwell Telescope (JCMT). presented here are look towards CMZ...
Context. The derived physical parameters for young HII regions are normally determined assuming the emission region to be optically thin. However, this assumption is unlikely hold such as hyper-compact HII(HCHII) and ultra-compact HII(UCHII) leads underestimation of their properties. This can overcome by fitting SEDs over a wide range radio frequencies. Aims. two primary goals study (1) determine properties from in search potential HCHII regions, (2) use these investigate evolution. Method....
Context. Filamentary structures in the interstellar medium are closely related to star formation. It is possible that dense gas mass fraction (DGMF) or clump formation efficiency large-scale filaments determine whether not they end up hosting activity. Aims. We aim automatically identify filaments, as well characterizing them, investigating their association with Galactic structures, and studying DGMFs. Methods. used a modified minimum spanning tree (MST) algorithm chain parsec-scale 13 CO...
Studies of Galactic H II regions are crucial importance for studying star formation and the evolution interstellar medium. Gaining an insight into their physical characteristics contributes to a more comprehensive understanding these phenomena. The GLOSTAR project aims provide GLObal view on STAR in Milky Way by performing unbiased sensitive survey. This is achieved using extremely wideband (4–8 GHz) C -band receiver Karl G. Jansky Very Large Array Effelsberg 100 m telescope. Using radio...
Human movement models often divide movements into parts. In walking, the stride can be segmented four different parts, and in golf other sports, swing is divided sections based on primary direction of motion. These parts are key events, also called temporal parameters. When analyzing a movement, it important to correctly locate these so automated techniques needed. There exist many methods for dividing specific actions using data from sensors, but new sensors or sensing positions, must...
We propose an efficient distributed object recognition system for sensing, compression, and of 3-D objects landmarks using a network wireless smart cameras. The foundation is based on recent work that shows the representation scale-invariant image features exhibit certain degree sparsity: If common observed by multiple cameras from different vantage points, corresponding can be efficiently compressed in fashion, joint signals simultaneously decoded compressive sensing theory. In this paper,...
We have carried out the largest and most unbiased search for hypercompact (HC) HII regions. Our method combines four interferometric radio continuum surveys (THOR, CORNISH, MAGPIS White2005) with far-infrared sub-mm Galactic Plane to identify embedded regions positive spectral indices. 120 spectrum been identified from a total sample of 534 index sources. None these regions, including known HCHII recovered in our search, fulfills canonical definition an region at 5 GHz. suggest that current...
Context. The formation processes of massive stars are still unclear but a picture is emerging involving accretion disks and molecular outflows in what appears to be scaled-up version low-mass star formation. A census outflow activity towards star-forming clumps various evolutionary stages has the potential shed light on (MSF). Aims. We conducted an survey ATLASGAL using SEDIGISM data aimed obtain large sample exhibiting different stages. Methods. identify high-velocity wings 13CO lines...
As part of the GLOSTAR survey we have used VLA in its B-configuration to observe Galactic plane between longitudes 28d and 36d latitudes from -1d +1d at C-band (4--8 GHz). To reduce contamination extended sources that are not well recovered by our coverage (u, v)-plane discarded short baselines sensitive emission on angular scales $<4"$. The resulting radio continuum images an resolution 1.0", sensitivity $\sim60 \mu$Jy~beam$^{-1}$; making it most covering a large area with this resolution....
Context. Cygnus X is one of the closest and most active high-mass star-forming regions in our Galaxy, making it best laboratories for studying massive star formation. Aims. We aim to investigate properties molecular gas structures on different linear scales with 4.8 GHz formaldehyde (H 2 CO) absorption line X. Methods. As part GLOSTAR Galactic plane survey, we performed large-scale (7º×3º) simultaneous H CO (1 1,0 –1 1,1 ) spectral radio continuum imaging observations toward at λ ~6 cm Karl...
The Cygnus X complex is covered by the Global View of Star Formation in Milky Way (GLOSTAR) survey, an unbiased radio-wavelength Galactic plane 4--8 GHz continuum radiation and several spectral lines. GLOSTAR survey observed 6.7~GHz transition methanol (CH$_3$OH), exclusive tracer high-mass young stellar objects. Using Very Large Array both B D configurations, we area Cygnus~X $7^{\rm o}\times3^{\rm o}$ size simultaneously line continuum, allowing cross-registration. We detected thirteen...