A5112737919- Atmospheric chemistry and aerosols
- Air Quality Monitoring and Forecasting
- Air Quality and Health Impacts
- Atmospheric Ozone and Climate
- Advanced Chemical Sensor Technologies
- COVID-19 impact on air quality
- Water Quality Monitoring and Analysis
- Translation Studies and Practices
- China's Socioeconomic Reforms and Governance
- Smart Materials for Construction
- Date Palm Research Studies
- Toxic Organic Pollutants Impact
- Heavy metals in environment
- Agriculture, Soil, Plant Science
- Internet of Things and Social Network Interactions
- Atmospheric and Environmental Gas Dynamics
- Nitrogen and Sulfur Effects on Brassica
- Subtitles and Audiovisual Media
- Advanced Fiber Laser Technologies
- Environmental and Agricultural Sciences
- Neural Networks and Reservoir Computing
- Language, Metaphor, and Cognition
- Coal and Its By-products
- Thermal Analysis in Power Transmission
- Innovative Educational Techniques
Fudan University
2019-2025
China Meteorological Administration
2024
State Key Laboratory of Pollution Control and Resource Reuse
2020-2023
Beijing University of Technology
2016-2019
Gansu Agricultural University
2015
Sichuan Agricultural University
2014
Chongqing Technology and Business University
2013
Zhejiang Radio and Television University
2008
Atmospheric gas-to-particle conversion is a crucial or even dominant contributor to haze formation in Chinese megacities terms of aerosol number, surface area and mass. Based on our comprehensive observations Beijing during 15 January 2018-31 March 2019, we are able show that 80-90% the mass (PM2.5) was formed via atmospheric reactions days over 65% number concentration particles resulted from new particle (NPF). Furthermore, faster when subsequent growth newly enhanced. Our findings suggest...
Abstract Intense and frequent new particle formation (NPF) events have been observed in polluted urban environments, yet the dominant mechanisms are still under debate. To understand key species governing processes of NPF we conducted comprehensive measurements downtown Beijing during January–March, 2018. We performed detailed analyses on sulfuric acid cluster composition budget, as well chemical physical properties oxidized organic molecules (OOMs). Our results demonstrate that fast...
Two-dimensional (2D) NbOI2 demonstrates significant second-harmonic generation (SHG) with a high conversion efficiency. To unlock its full potential in practical applications, it is desirable to modulate the SHG behavior while utilizing intrinsic lattice anisotropy. Here, we demonstrate direction-specific modulation of response by applying anisotropic strain respect orientations, where more than 2-fold enhancement intensity achieved under along polar axis. The strain-driven evolution...
Abstract. Gas-phase oxidation pathways and products of anthropogenic volatile organic compounds (VOCs), mainly aromatics, are the subject intensive research, with attention paid to their contributions secondary aerosol (SOA) formation potentially new particle (NPF) in urban atmosphere. In this study, a series OH-initiated experiments trimethylbenzene (TMB, C9H12) including 1,2,4-TMB, 1,3,5-TMB, 1,2,3-TMB, 1,2,4-(methyl-D3)-TMBs (C9H9D3) were investigated an flow reactor (OFR) absence...
Abstract. Gaseous sulfuric acid (H2SO4) is known as one of the key precursors for atmospheric new particle formation (NPF) processes, but its measurement remains challenging. Therefore, a proxy method that able to derive gaseous concentrations from parameters can be measured relatively easily and accurately highly desirable chemistry community. Although such methods are available clean environments, works well in polluted atmosphere, found Chinese megacities, yet developed. In this study,...
Abstract Sulfuric acid (SA)‐dimethylamine (DMA)‐H 2 O cluster formation has been proven to be responsible for a significant part of new particle (NPF) in Chinese megacity. However, the possible involvement common atmospheric acids subsequent growth SA‐DMA clusters remains elusive. We simulated and using relevant concentrations SA, DMA, trifluoroacetic (TFA), commonly observed perfluorocarboxylic acid, Density Functional Theory combined with Atmospheric Cluster Dynamics Code. The presence TFA...
Abstract. Formaldehyde (HCHO) is an important trace gas that affects the abundance of HO2 radicals and ozone, leads to complex photochemical processes, yields a variety secondary atmospheric pollutants. In 2021 summer campaign at Dianshan Lake (DSL) Air Quality Monitoring Supersite in suburban area Shanghai, China, we measured formaldehyde by commercial Aero-Laser monitor, methane, range non-methane hydrocarbons (NMHCs). Ambient HCHO showed significant diurnal cycle with average...
Abstract Total hydroxyl radicals (OH) reactivity, as a measure of the OH total loss rate and significance atmospheric oxidation, is broadly used to evaluate budget in atmosphere. Here, measurements reactivity were performed at suburban air quality monitoring supersite (Dianshan Lake) Shanghai, between 1 August 15 September, 2020, using Comparative Reactivity Method. The measured ranged from 13.9 107.4 s −1 with an average 38.4 . Meanwhile, calculated varied 8.9 84.4 concentrations trace...
Abstract. During the COVID-19 lockdown, dramatic reduction of anthropogenic emissions provided a unique opportunity to investigate effects reduced activity and primary on atmospheric chemical processes consequent formation secondary pollutants. Here, we utilize comprehensive observations examine response new particle (NPF) changes in cocktail. We find that main clustering process was unaffected by drastically traffic emissions, rate 1.5 nm particles remained unaltered. However, survival...
Abstract. Chlorine (Cl) atoms generated from the photolysis of atmospheric reactive chlorine species can rapidly react with various volatile organic compounds (VOCs), forming chlorine- and non-chlorine-containing low-volatile oxygenated molecules. Yet, formation mechanisms chlorine-containing molecules (Cl-OOMs) reactions Cl aromatics in presence absence NOx are not fully understood. Here, we investigated Cl-OOMs Cl-initiated three typical (i.e., toluene, m-xylene, 1,2,4-trimethylbenzene...
Abstract. The volatility of organic aerosols plays a key role in determining their gas–particle partitioning, which subsequently alters the physicochemical properties and atmospheric fates aerosol particles. Nevertheless, an accurate estimation (OAs) remains challenging because most standards for particulate compounds are not available, even those with standards, vapor pressures too low to be measured by traditional methods. Here, we deployed iodide-adduct long time-of-flight chemical...
Evaluating the volatility of organic compounds based solely on their molecular formulas would avoid tough demands in deriving structures. Here, we deployed an iodide-adduct Long Time-of-Flight Chemical Ionization Mass Spectrometry (LToF-CIMS) combined with a Filter Inlet for Gases and AEROsols (FIGAERO) to investigate thermograms ambient particulate samples collected summer 2021 suburban site Shanghai estimate saturation vapor pressures low- semivolatile components aerosols. Then,...
Abstract. Highly oxygenated organic molecules (HOMs) can participate in new particle formation (NPF) and enhance growth of newly formed particles partially because their low volatility. Previous studies have shown HOMs via autoxidation reactions RO2 intermediates generated by OH-initiated oxidation anthropogenic volatile compounds (VOCs). It was also suggested that multi-generation OH could be an important source for aromatics-derived HOMs. However, our understanding the generation is still...
Competitive crops or cultivars can be an important component of integrated weed management systems. A study was conducted from 2003 to 2006 at four sites across semiarid prairie ecoregions in Saskatchewan and Alberta investigate the productivity quality canola (Brassica napusL.) mustard under competition. Four open-pollinated cultivars, hybrid two canola-quality oriental [Brassica juncea (L.) Czern. & Coss.], yellow (Sinapis alba L.) were grown weedy weed-free conditions. When combined...
Acoustic keyword spotting (KWS) plays a pivotal role in the voice-activated systems of artificial intelligence (AI), allowing for hands-free interactions between humans and smart devices through information retrieval voice commands. The cloud computing technology integrated with neural networks has been employed to execute KWS tasks, which however suffers from propagation delay risk privacy breach. Here, we report single-node reservoir (RC) system based on CuInP