A5101544715- Atmospheric chemistry and aerosols
- Atmospheric Ozone and Climate
- Molecular Sensors and Ion Detection
- Air Quality and Health Impacts
- Sulfur Compounds in Biology
- Atmospheric aerosols and clouds
- nanoparticles nucleation surface interactions
- Atmospheric and Environmental Gas Dynamics
- Luminescence and Fluorescent Materials
- Spectroscopy and Laser Applications
- Advanced Chemical Physics Studies
- Air Quality Monitoring and Forecasting
- Advanced oxidation water treatment
- Gait Recognition and Analysis
- Human Pose and Action Recognition
- Geochemistry and Elemental Analysis
- Geological and Geochemical Analysis
- Electrohydrodynamics and Fluid Dynamics
- Gene expression and cancer classification
- Toxic Organic Pollutants Impact
- Advanced Measurement and Detection Methods
- Water Treatment and Disinfection
- Coagulation and Flocculation Studies
- Advanced Nanomaterials in Catalysis
- Membrane Separation Technologies
Chaohu University
2022-2025
Dalian Maritime University
2025
Sun Yat-sen University
2024
Microsoft Research Asia (China)
2021-2024
University of Science and Technology of China
2015-2022
Heilongjiang University of Science and Technology
2022
PLA Air Force Aviation University
2021
Texas A&M University
2020
Anhui Institute of Optics and Fine Mechanics
2015-2019
Chinese Academy of Sciences
2015-2019
High levels of ultrafine particles (UFPs; diameter less than 50 nm) are frequently produced from new particle formation under urban conditions, with profound implications on human health, weather, and climate. However, the fundamental mechanisms remain elusive, few experimental studies have realistically replicated relevant atmospheric conditions. Previous simulated oxidation one compound or a mixture compounds, extrapolation laboratory results to chemically complex air was uncertain. Here,...
Large amounts of small α-dicarbonyls (glyoxal and methylglyoxal) are produced in the atmosphere from photochemical oxidation biogenic isoprene anthropogenic aromatics, but fundamental mechanisms leading to secondary organic aerosol (SOA) brown carbon (BrC) formation remain elusive. Methylglyoxal is commonly believed be less reactive than glyoxal because unreactive methyl substitution, available laboratory measurements showed negligible growth methylglyoxal. Herein, we present experimental...
Ammonia and amines are important common trace atmospheric species that can enhance new particle formation (NPF) in the Earth's atmosphere. However, synergistic effect of these two bases involving nucleation is still lacking. We studied most stable geometric structures thermodynamics quaternary (NH3)(CH3NH2)(H2SO4) m(H2O) n ( m = 1-3, 0-4) clusters at PW91PW91/6-311++G(3df,3pd) level theory for first time. find proton transfer from H2SO4 molecule to CH3NH2 easier than NH3 free or hydrated...
The presence of amines can increase aerosol formation rates. Most studies have been devoted to dimethylamine as the representative amine; however, there a few works methylamine. In this study, theoretical calculations are performed on CH3NH2(H2SO4)m(H2O)n (m = 0-3, n 0-3) clusters. addition structures and energetics, we focused determining following characteristics: (1) growth mechanism, (2) hydrate distributions influences humidity temperature, (3) Rayleigh scattering properties. We...
Amino acids are recognized as important components of atmospheric aerosols, which impact on the Earth's climate directly and indirectly. However, much remains unknown about initial events nucleation. In this work, interaction alanine [NH2CH(CH3)COOH or Ala], one most abundant amino in atmosphere, with sulfuric acid (SA) water (W) has been investigated at M06-2X/6-311++G(3df, 3pd) level theory. We have studied thermodynamics hydrated (Ala)(SA) core system up to four molecules. found that Ala,...
Most semi-supervised learning models are consistency-based, which leverage unlabeled images by maximizing the similarity between different augmentations of an image. But when we apply them to human pose estimation that has extremely imbalanced class distribution, they often collapse and predict every pixel in as background. We find this is because decision boundary passes high-density areas minor so more pixels gradually misclassified In work, present a surprisingly simple approach drive...
A novel multi-level pyramidal pooling residual U-Net with adversarial mechanism was proposed for organ segmentation from medical imaging, and conducted on the challenging NIH Pancreas-CT dataset.The 82 pancreatic contrast-enhanced abdominal CT volumes were split via four-fold cross validation to test model performance. In order achieve accurate segmentation, we firstly involved learning into an a better gradient information flow improving Then, introduced module (MLPP), where gather...
Atmospheric aerosol nucleation contributes to approximately half of the worldwide cloud condensation nuclei. Despite importance climate, detailed mechanisms are still poorly understood. Understanding dynamics is hindered by nonreactivity force fields (FFs) and high computational costs due rare event nature nucleation. Developing reactive FFs for systems even more challenging than developing covalently bonded materials because wide size range dimensional characteristics noncovalent hydrogen...
A previous study of the binary system (H<sub>2</sub>C<sub>2</sub>O<sub>4</sub>)(NH<sub>3</sub>)<sub>n</sub> (<italic>n</italic> = 1–6) suggested that an oxalic acid–ammonia complex may participate in atmospheric aerosol formations.
Atmospheric aerosols have a tremendous influence on visibility, climate, and human health. New particle formation (NPF) is crucial source of atmospheric aerosols. At present, certain field observations experiments discovered the presence 3-hydroxy-4,4-dimethylglutaric acid (HDMGA), which may participate in NPF events. However, nucleation mechanism HDMGA has not been clearly understood. In addition, dimethylamine (DMA) an important precursor nucleation. The involving DMA studied. this study,...
It is well accepted that peroxynitrite (ONOO
Amines have been proposed to participate in the nucleation process, but electron density analysis and determination of a temperature dependence clusters are still lacking.
Aldehydes were speculated to be important precursor species in new particle formation (NPF). The direct involvement of formaldehyde (CH2O) sulfuric acid and water nucleation is negligible; however, whether its atmospheric hydrolysate, methanediol (CH2(OH)2), which contains two hydroxyl groups, participates NPF not known. This work investigates both CH2O hydrolysis from CH2(OH)2 with quantum chemistry calculations cluster dynamics modeling. Kinetic calculation shows that reaction rates the...