Jun Zheng
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View article: Exploring the Relationship Between Childhood Maltreatment, Alexithymia, and Facial Emotional Recognition in Schizophrenia
Exploring the Relationship Between Childhood Maltreatment, Alexithymia, and Facial Emotional Recognition in Schizophrenia Open
Background : Childhood maltreatment is a significant factor affecting social cognition in schizophrenia (SCZ) patients. However, the relationship between childhood maltreatment, alexithymia, and facial emotional recognition in SCZ remains …
View article: A versatile instrument for simultaneous detection of atmospheric H2SO4 and OH radicals
A versatile instrument for simultaneous detection of atmospheric H2SO4 and OH radicals Open
Both sulfuric acid (H2SO4) (SA) and hydroxyl radical (OH) play critical roles in the atmospheric chemistry processes. In most environments, from the pristine Tibet plateau to highly populated megacities, SA is the decisive nucleation precu…
View article: Simultaneous detection of gaseous sulfuric acid and OH radicals using chemical ionization mass spectrometry
Simultaneous detection of gaseous sulfuric acid and OH radicals using chemical ionization mass spectrometry Open
Hydroxyl radical (OH) is the dominant oxidation agent in the atmosphere due to its high reactivity. OH plays a decisive role in the degradation of primary air pollutants and the formation of secondary air pollutants (e.g., SOA and O3). For…
View article: Observation and source apportionment of atmospheric alkaline gases in urban Beijing, China
Observation and source apportionment of atmospheric alkaline gases in urban Beijing, China Open
Atmospheric alkaline gases, including NH3 and amines, have been demonstrated to play crucial roles in atmospheric chemical processes, from enhancing atmospheric nucleation to promoting secondary particulate matter formation. It has been su…
View article: Field programmable gate array-based coherent lidar employing the ordinal statistics method for fast Doppler frequency determination
Field programmable gate array-based coherent lidar employing the ordinal statistics method for fast Doppler frequency determination Open
We report the development of a portable coherent Doppler lidar (CDL) system incorporating onboard field programmable gate array for real-time data processing. An ordinal statistic-based mean Doppler frequency estimation algorithm with high…
View article: The dependence of new particle formation rates on the interaction between cluster growth, evaporation, and condensation sink
The dependence of new particle formation rates on the interaction between cluster growth, evaporation, and condensation sink Open
Cluster growth, evaporation, and loss to pre-existing particles collectively determine the atmospheric new particle formation rate.
View article: The missing base molecules in atmospheric acid–base nucleation
The missing base molecules in atmospheric acid–base nucleation Open
Transformation of low-volatility gaseous precursors to new particles affects aerosol number concentration, cloud formation and hence the climate. The clustering of acid and base molecules is a major mechanism driving fast nucleation and in…
View article: Influence of organic aerosol molecular composition on particle absorptive properties in autumn Beijing
Influence of organic aerosol molecular composition on particle absorptive properties in autumn Beijing Open
Organic aerosol (OA) is a major component of fine particulate matter (PM), affecting air quality, human health, and the climate. The absorptive and reflective behavior of OA components contributes to determining particle optical properties…
View article: Affordable <i>Ab Initio</i> Path Integral for Thermodynamic Properties via Molecular Dynamics Simulations Using Semiempirical Reference Potential
Affordable <i>Ab Initio</i> Path Integral for Thermodynamic Properties via Molecular Dynamics Simulations Using Semiempirical Reference Potential Open
Path integral molecular dynamics (PIMD) is becoming a routinely applied method for incorporating the nuclear quantum effect in computer simulations. However, direct PIMD simulations at an ab initio level of theory are formidably expensive.…
View article: Comment on acp-2021-528
Comment on acp-2021-528 Open
Abstract. Organic aerosol (OA) is a major component of fine particulate matter (PM), affecting air quality, human health, and the climate. The absorptive and reflective behavior of OA components contributes to determining particle optical …
View article: Affordable Ab Initio Path Integral for Thermodynamic Properties via Molecular Dynamics Simulations Using Semiempirical Reference Potential
Affordable Ab Initio Path Integral for Thermodynamic Properties via Molecular Dynamics Simulations Using Semiempirical Reference Potential Open
Path integral molecular dynamics (PIMD) is becoming a routinely applied method for the incorporation of the nuclear quantum effect in computer simulations. However, direct PIMD simulations at an ab initio level of theory are formidably exp…
View article: Design of a Generic Virtual Measurement Workflow for Processing Archived Point Cloud of Trees and Its Implementation of Light Condition Measurements on Stems
Design of a Generic Virtual Measurement Workflow for Processing Archived Point Cloud of Trees and Its Implementation of Light Condition Measurements on Stems Open
Virtual measurement workflow (VMW) was a generic data mining method developed in this study. It was used to extract tree information from archived point clouds under limited conditions by applying virtual measurements in virtual reality. A…
View article: Influence of organic aerosol composition determined by offline FIGAERO-CIMS on particle absorptive properties in autumn Beijing
Influence of organic aerosol composition determined by offline FIGAERO-CIMS on particle absorptive properties in autumn Beijing Open
Organic aerosol (OA) is a major component of fine particulate matter (PM) affecting air quality, human health, and the climate. The absorptive and reflective behavior of OA components contributes to determining particle optical properties …
View article: Uptake of Water‐soluble Gas‐phase Oxidation Products Drives Organic Particulate Pollution in Beijing
Uptake of Water‐soluble Gas‐phase Oxidation Products Drives Organic Particulate Pollution in Beijing Open
Despite the recent decrease in pollution events in Chinese urban areas, the World Health Organization air quality guideline values are still exceeded. Observations from monitoring networks show a stronger decrease of organic aerosol direct…
View article: The Synergistic Role of Sulfuric Acid, Bases, and Oxidized Organics Governing New‐Particle Formation in Beijing
The Synergistic Role of Sulfuric Acid, Bases, and Oxidized Organics Governing New‐Particle Formation in Beijing Open
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 the key species and governing processes of NPF in polluted urban …
View article: Secondary new particle formation initiated by sulfuric acid-amine nucleation in Beijing
Secondary new particle formation initiated by sulfuric acid-amine nucleation in Beijing Open
<p>Secondary new particle formation is an important source of the number concentration of atmospheric aerosols. Despite relatively high coagulation sinks contributed by pre-existing aerosols, intensive new particle formation occurs f…
View article: Heterogeneous formation and partitioning of nitrous acid on water surfaces: dependency on the acidity
Heterogeneous formation and partitioning of nitrous acid on water surfaces: dependency on the acidity Open
<p>Hydrolysis of nitrogen dioxide (NO<sub>2</sub>) has long been recognized as a major formation path of atmospheric nitrous acid (HONO), which is regarded as a dominant hydroxyl radical (OH) source, particularly in a pol…
View article: Sulfuric acid–amine nucleation in urban Beijing
Sulfuric acid–amine nucleation in urban Beijing Open
New particle formation (NPF) is one of the major sources of atmospheric ultrafine particles. Due to the high aerosol and trace gas concentrations, the mechanism and governing factors for NPF in the polluted atmospheric boundary layer may b…
View article: Accelerated Computation of Free Energy Profile at <i>Ab Initio</i> Quantum Mechanical/Molecular Mechanics Accuracy via a Semiempirical Reference Potential. 4. Adaptive QM/MM
Accelerated Computation of Free Energy Profile at <i>Ab Initio</i> Quantum Mechanical/Molecular Mechanics Accuracy via a Semiempirical Reference Potential. 4. Adaptive QM/MM Open
Although quantum mechanical/molecular mechanics (QM/MM) methods are now routinely applied to the studies of chemical reactions in condensed phases and enzymatic reactions, they may experience technical difficulties when the reactive region…
View article: Accelerated Computation of Free Energy Profile at <i>Ab Initio</i> Quantum Mechanical/Molecular Mechanics Accuracy via a Semiempirical Reference Potential. 3. Gaussian Smoothing on Density-of-States
Accelerated Computation of Free Energy Profile at <i>Ab Initio</i> Quantum Mechanical/Molecular Mechanics Accuracy via a Semiempirical Reference Potential. 3. Gaussian Smoothing on Density-of-States Open
Calculations of the free energy profile, also known as potential of mean force (PMF), along a chosen collective variable (CV) are now routinely applied in the studies of chemical processes, such as enzymatic reactions and chemical reaction…
View article: Is reducing new particle formation a plausible solution to mitigate particulate air pollution in Beijing and other Chinese megacities?
Is reducing new particle formation a plausible solution to mitigate particulate air pollution in Beijing and other Chinese megacities? Open
Based on our comprehensive observations in Beijing, we show that 80–90% of PM2.5 was formed via atmospheric reactions during haze days and over 65% of the number concentration of haze particles resulted from new particle formation.
View article: Accelerated Computation of Free Energy Profile at Ab Initio QM/MM Accuracy via a Semi-Empirical Reference-Potential. III. Gaussian Smoothing on Density-of-States
Accelerated Computation of Free Energy Profile at Ab Initio QM/MM Accuracy via a Semi-Empirical Reference-Potential. III. Gaussian Smoothing on Density-of-States Open
Calculations of free energy profile, aka potential of mean force (PMF), along a chosen collective variable (CV) are now routinely applied to the studies of chemical processes, such as enzymatic reactions and chemical reactions in condensed…
View article: Continuous and comprehensive atmospheric observations in Beijing: a station to understand the complex urban atmospheric environment
Continuous and comprehensive atmospheric observations in Beijing: a station to understand the complex urban atmospheric environment Open
Due to profound impact on climate and human health, air quality has attracted attention from all levels of the civil society. The key step in the provision of required tools for the society to tackle the complex air quality problem is to c…
View article: Seasonal Characteristics of New Particle Formation and Growth in Urban Beijing
Seasonal Characteristics of New Particle Formation and Growth in Urban Beijing Open
Understanding the atmospheric new particle formation (NPF) process within the global range is important for revealing the budget of atmospheric aerosols and their impacts. We investigated the seasonal characteristics of NPF in the urban en…
View article: Carbenium ion-mediated oligomerization of methylglyoxal for secondary organic aerosol formation
Carbenium ion-mediated oligomerization of methylglyoxal for secondary organic aerosol formation Open
Significance Secondary organic aerosol (SOA) from photochemical oxidation of volatile organic compounds represents one of the most dominant constituents of fine particulate matter in the troposphere, with profound implications for air qual…