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Formation of secondary inorganic aerosol in a frigid urban atmosphere

Frontiers of Environmental Science & Engineering 2022年第2期16卷 39-50页

作者： Yuan Cheng Qinqin Yu Jiumeng Liu Youwen Sun Linlin Liang Zhenyu Du Guannan Geng Wanli Ma Hong Qi Qiang Zhang Kebin He State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin 150090China Key Laboratory of Environmental Optics and Technology Anhui Institute of Optics and Fine MechanicsChinese Academy of SciencesHefei 230031China State Key Laboratory of Severe Weather&CMA Key Laboratory of Atmospheric Chemistry Chinese Academy of Meteorological SciencesBeijing 100081China National Research Center for Environmental Analysis and Measurement Environmental Development Center of the Ministry of Ecology and EnvironmentBeijing 100029China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China Department of Earth System Science Tsinghua UniversityBeijing 100084China

Formation of secondary inorganic aerosol(SIA)was investigated during a six-month long heating season in Harbin,*** sulfate formation was observed at high relative humidity(RH),with the same threshold RH(80%)for both colder and warmer measurement *** to wintertime results from Beijing,the threshold RH was considerably higher in Harbin,whereas the RH-dependent enhancement of sulfur oxidation ratio(SOR)was less *** addition,the high RH events were rarely encountered,and for other periods,the SOR were typically as low as~***,the sulfate formation was considered inefficient in this *** excluding the several cases with high RH,both SOR and the nitrogen oxidation ratio(NOR)exhibited increasing trends as the temperature increased,with the increase of NOR being *** nitrate to sulfate ratio tended to increase with increasing temperature as *** on a semi-quantitative approach,this trend was attributed primarily to the temperature-dependent variations of precursors including SO_(2) and NO_(2).The influence of biomass burning emissions on SIA formation was also *** stronger impact of biomass burning,an enhancement in NOR was observed whereas SOR was largely *** different patterns were identified as the dominant driver of the larger nitrate to sulfate ratios measured at higher concentrations of fine particulate matter.

关键词： Haze Sulfate Nitrate Heterogeneous chemistry Biomass burning

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Single‑Neuron Reconstruction of the Macaque Primary Motor Cortex Reveals the Diversity of Neuronal Morphology

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Neuroscience Bulletin 2025年第3期41卷 525-530页

作者： Siyu Li Yan Shen Yefei Chen Zexuan Hong Lewei Zhang Lufeng Ding Chao‑Yu Yang Xiaoyang Qi Quqing Shen Yanyang Xiao Pak‑Ming Lau Zhonghua Lu Fang Xu Guo‑Qiang Bi CAS Key Laboratory of Brain Function and Disease Division of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefei 230026China Interdisciplinary Center for Brain Information Shenzhen-Hong Kong Institute of Brain ScienceShenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China Shenzhen Technological Research Center for Primate Translational Medicine Shenzhen Key Laboratory for Molecular Biology of Neural DevelopmentShenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China The Key Laboratory of Biomedical Imaging Science and System Chinese Academy of SciencesShenzhen 518055China CAS Key Laboratory of Brain Connectome and Manipulation the Brain Cognition and Brain Disease InstituteShenzhen Institutes of Advanced TechnologyChinese Academy of SciencesShenzhen 518055China Faculty of Life and Health Sciences Shenzhen University of Advanced TechnologyShenzhen 518107China

Dear Editor,The primary motor cortex,also known as MOp in rodents,F1,or M1 in primates[1],plays a crucial role in autonomous motor *** is interconnected with other motor control structures such as the basal ganglia,thalamus,and *** these connections,the corticostriatal system plays a significant role in functions including action selection,motor control,sequence learning,and habit formation[2].

关键词： habit formation autonomous motor controlit morphology action selectionmotor corticostriatal system neuron basal gangliathalamusand primary motor cortexalso

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Cloud accounting resource sharing platform to participate in the subject behavior game research

Cloud accounting resource sharing platform to participate in...

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第35届中国控制与决策会议

作者： HUAPING WU HUI LI WEIWEI FENG Accounting Research and Development Center of Chongqing University of Technology Chongqing Hi-Lex Cable System Group Co. Ltd Accounting School of Chongqing University of Technology

The participants of the cloud accounting resource sharing platform,resource providers and resource demanders,are the core factors that affect the development of the *** behavior plays a decisive role in the speed and direction of the platform's ***,using an incomplete information static game model to analyze the game behavior between the platform and resource providers,and using an incomplete information dynamic game model to analyze the game behavior between the platform and resource demanders,the Nash equilibrium of both models can be *** is known that the strategic choices of resource providers and resource demanders will affect the strategic choices of the platform,and then the factors affecting the Nash equilibrium are analyzed,and relevant suggestions are put forward to provide reference for the comprehensive development of the cloud accounting resource sharing platform.

关键词： cloud accounting resource sharing platform game model subject behavior

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Oxidation Mechanism and Toxicity Evolution of Linalool,a Typical Indoor Volatile Chemical Product

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Environment & Health 2024年第7期2卷 486-498页

作者： Zihao Fu Song Guo Ying Yu Hong-Bin Xie Shiyu Li Daqi Lv Putian Zhou Kai Song Zheng Chen Rui Tan Kun Hu Ruizhe Shen Maosheng Yao Min Hu State Key Joint Laboratory of Environmental Simulation and Pollution Control International Joint Laboratory for Regional Pollution ControlMinistry of Education(IJRC)College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Nanjing University of Information Science&TechnologyNanjing 210044China Key Laboratory of Industrial Ecology and Environmental Engineering(Ministry of Education) School of Environmental Science and TechnologyDalian University of TechnologyDalian 116024China Institute for Atmospheric and Earth System Research/Physics Faculty of ScienceUniversity of HelsinkiP.O.Box 64FIN-00014 HelsinkiFinland

Linalool,a high-reactivity volatile chemical product(VCP)commonly found in cleaning products and disinfectants,is increasingly recognized as an emerging contaminant,especially in indoor *** the gas-phase oxidation mechanism of linalool is crucial for assessing its impact on atmospheric chemistry and human *** quantum chemical calculations and computational toxicology simulations,we investigated the atmospheric transformation and toxicity evolution of linalool under low and high NO/HO_(2)·levels,representing indoor and outdoor *** findings reveal that linalool can undergo the novel mechanisms involving concerted peroxy(RO_(2)·)and alkoxy radical(RO·)modulated autoxidation,particularly emphasizing the importance of cyclization reactions *** expands the widely known RO_(2)·-dominated H-shift-driven autoxidation and proposes a generalized autoxidation mechanism that leads to the formation of low-volatility secondary organic aerosol(SOA)*** analysis shows that over half of transformation products(TPs)exhibited higher carcinogenicity and respiratory toxicity compared to *** also propose time-dependent toxic effects of TPs to assess their long-term *** results indicate that the strong indoor emission coupled with slow consumption rates lead to significant health risks under an indoor *** results highlight complex indoor air chemistry and health concerns regarding persistent toxic products during indoor cleaning,which involves the use of linalool or other VCPs.

关键词： volatile chemical products(VCPs) peroxy radicals(RO_(2)·) atmospheric autoxidation secondary organic aerosol(SOA) computational toxicology

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Brightness temperature simulation of subarctic lake-ice evolution by HIGHTSI and SMRT model

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Advances in Polar Science 2024年第3期35卷 303-323页

作者： ZHANG Yixiao QIU Yubao PENG Chongtai Bin CHENG SHI Lijuan Matti LEPPARANTA Key Laboratory of Digital Earth Science Aerospace Information Research InstituteChinese Academy of SciencesBeijing 100094China International Research Center of Big Data for Sustainable Development Goals Beijing 100094China University of Chinese Academy of Sciences Bejing 100049China School of Information and Communication Guilin University ofElectronic TechnologyGuilin 541004China Finnish Meteorological Institute Helsinki 00101Finland National Key Laboratory of Microwave Imaging Technology Aerospace Information Research InstituteChinese Academy of SciencesBeijing 100094China Department of Space Microwave Remote Sensing System Aerospace Information Research InstituteChinese Academy of SciencesBeijing 100094China University of Helsinki Helsinki 00014Finland

Microwave brightness temperature(TB)can be used to retrieve lake ice thickness in the Arctic and subarctic ***,the accuracy of the retrieval is affected by the physical properties of lake *** improve the understanding of how lake ice affects TB,numerical modeling was *** study combined a physical thermodynamic ice model HIGHTSI with a microwave radiation transfer model SMRT to simulate the TB and lake ice evolution in 2002-2011 in Hulun Lake,*** reanalyzed meteorological data were used as atmospheric *** ice season was divided into the growth period,the slow growth period,and the ablation *** simulations revealed that TB was highly sensitive to ice thickness during the ice season,especially vertical polarization measurement at 18.7 *** quadratic polynomial fit for ice thickness to TB outperformed the linear fit,regardless of whether lake ice contained bubbles or not.A comparison of the simulated TB with space-borne TB showed that the simulated TB had the best accuracy during the slow growth period,with a minimum RMSE of 4.6 *** results were influenced by the bubble radius and *** findings enhance comprehension of the interaction between lake ice properties(including ice thickness,bubbles,and salinity)and TB during ice seasons,offering insights to sea ice in the Arctic and subarctic freshwater observations.

关键词： lake ice evolution HIGHTSI SMRT ice thickness passive microwave brightness temperature

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Influence Degree Analysis of Landing Points of Small-sized Fixed-wing Gliding UAV in Short Range 6

Influence Degree Analysis of Landing Points of Small-sized F...

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2022 6th International Conference on Artificial Intelligence, Automation and Control Technologies, AIACT 2022

作者： Jiang, Tieying Ma, Xiangsen Yang, Chengwei Mao, Yukun Aerospace Times FeiHong Technology Company Limited China Academy Of Aerospace Electronics Technology Beijing100094 China Intelligent Unmanned System Overall Technology Research And Development Center China Aerospace Science And Technology Corporation Beijing100094 China School Of Mechatronical Engineering Beijing Institute Of Technology Beijing100081 China

Enhancing the landing accuracy and reducing landing point dispersion of Unmanned Aerial Vehicles (UAVs) with fixed wings is critical for expanding the applications of UAVs in complex terrains. Faced with the requirement for arresting recovery for UAV landings in short range, a UAV with fixed wings is chosen as the research basis. The landing strategy for UAVs has been modified by the addition of wing flaps, dynamic compensation control, and ultrasonic sensors, among other things. Additionally, the simulation model validated the feasibility of the modified landing-recovery strategy. The Monte Carlo method is used to analyze the influence of interference sources, such as constant wind, gust, positioning error, airspeed measurement, mass, air density, processing and assembly, and control error, on landing point dispersion. simulation results indicate that the modified landing strategy can significantly improve the short landing performance for small-sized UAVs with fixed wings. © Published under licence by IOP Publishing Ltd.

关键词： Fixed wings

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Enhanced secondary pollution offset reduction of primary emissions during COVID-19 lockdown in China

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National Science Review 2021年第2期8卷 51-59页

作者： Xin Huang Aijun Ding Jian Gao Bo Zheng Derong Zhou Ximeng Qi Rong Tang Jiaping Wang Chuanhua Ren Wei Nie Xuguang Chi Zheng Xu Liangduo Chen Yuanyuan Li Fei Che Nini Pang Haikun Wang Dan Tong Wei Qin Wei Cheng Weijing Liu Qingyan Fu Baoxian Liu Fahe Chai Steven J.Davis Qiang Zhang Kebin He School of Atmospheric Sciences Nanjing University Chinese Research Academy of Environmental Sciences Department of Earth System Science Tsinghua University State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua University Department of Earth System Science University of California Jiangsu Environmental Monitoring Center Jiangsu Provincial Academy of Environment Science Shanghai Environmental Monitoring Center Beijing Key Laboratory of Airborne Particulate Matter Monitoring Technology Beijing Municipal Environmental Monitoring Center

To control the spread of the 2019 novel coronavirus(COVID-19), China imposed nationwide restrictions on the movement of its population(lockdown) after the Chinese New Year of 2020, leading to large reductions in economic activities and associated emissions. Despite such large decreases in primary pollution, there were nonetheless several periods of heavy haze pollution in eastern China, raising questions about the well-established relationship between human activities and air quality. Here, using comprehensive measurements and modeling, we show that the haze during the COVID lockdown was driven by enhancements of secondary pollution. In particular, large decreases in NOx emissions from transportation increased ozone and nighttime NO3radical formation, and these increases in atmospheric oxidizing capacity in turn facilitated the formation of secondary particulate matter. Our results, afforded by the tragic natural experiment of the COVID-19 pandemic, indicate that haze mitigation depends upon a coordinated and balanced strategy for controlling multiple pollutants.

关键词： COVID-19 haze pollution ozone emission reduction secondary pollution

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De novo transcriptome assembly and metabolomic analysis of three tissue types in Cinnamomum cassia

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Chinese Herbal Medicines 2023年第2期15卷 310-316页

作者： Hongyang Gao Huiju Zhang Yuqing Hu Danyun Xu Sikai Zheng Shuting Su Quan Yang School of Traditional Chinese Medicine Guangdong Pharmaceutical UniversityGuangzhou 510006China Key Laboratory of Production&Development of Cantonese Medicinal Materials State Administration of Traditional Chinese MedicineGuangzhou 510006China Guangdong Provincial Research Center on Good Agricultural Practice&Comprehensive Agricultural Development Engineering Technology of Cantonese Medicinal Materials Guangzhou 510006China Comprehensive Experimental Station of Guangzhou Chinese Material MedicaChina Agriculture Research System(CARS-21-16)Guangzhou 510006China

Objective:The barks,leaves,and branches of Cinnamomum cassia have been historically used as a traditional Chinese medicine,spice,and food preservative,in which phenylpropanoids are responsible *** phenylpropanoid biosynthesis pathways are not clear in *** elucidated the pathways by descriptive analyses of differentially expressed genes related to phenylpropanoid biosynthesis as well as to identify various phenylpropanoid ***:Chemical analysis,metabolome sequencing,and transcriptome sequencing were performed to investigate the molecular mechanisms underlying the difference of active components content in the barks,branches and leaves of ***:Metabolomic analysis revealed that small amounts of flavonoids,coumarine,and cinnamaldehyde accumulated in both leaves and *** analysis showed that genes associated with phenylpropanoid and flavonoid biosynthesis were downregulated in the leaves and branches relative to the *** observed differences in essential oil content among the three tissues may be attributable to the differential expression of genes involved in the phenylpropanoid and flavonoid metabolic ***:This study identified the key genes in the phenylpropanoid pathway controling the flavonoid,coumarine,and cinnamaldehyde contents in the barks,branches and leaves by comparing the transcriptome and *** findings may be valuable in assessing phenylpropanoid and flavonoid metabolites and identifying specific candidate genes that are related to the synthesis of phenylpropanoids and flavonoids in ***.

关键词： Cinnamomum cassia Presl metabolomic phenylpropanoid biosynthesis transcriptome

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Parallel Optimization of Computational Fluid Dynamics Application code_saturne Based on Next Generation Sunway Supercomputer 14

Parallel Optimization of Computational Fluid Dynamics Applic...

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14th International Symposium on Parallel Architectures, Algorithms and Programming, PAAP 2023

作者： Liu, Anjun Liao, Yin Xu, Xihao Chen, YanYan Zhong, Hongjun Wu, Jianming Kong, Bo Raikov, Alexander Guo, Meng Jinan Institute of Supercomputing Technology Jinan Key Laboratory of High Performance Industrial Software Jinan China Zhejiang Yuansuan Technology Co. Ltd Jinan Supercomputing-Zhejiang Yuansuan Industrial Simulation System Joint Laboratory Hangzhou China Qilu University of Technology Shandong Academy of Sciences Ministry of Education Shandong Computer Science Center National Supercomputer Center in Jinan Key Laboratory of Computing Power Network and Information Security China Fundamental Research Center for Computer Science Shandong Provincial Key Laboratory of Computer Networks Shandong Jinan China

ISBN: (纸本)9798350371024

code_saturne is an open-source general large-scale computational fluid dynamics software independently developed by Electricite de France since 1997. Due to its high computing performance, code_saturne has been widely used in the nuclear industry, heavy fuel and biomass combustion, particle tracking and other computational fluid dynamics fields. In this work, we implemented code_saturne on the new generation Sunway supercomputer (SW26010pro) at the first time. By applying the data value-taking technology of double cache, combined with Sunway shared memory technology, we have adapted the data structure and Modular programming of code_saturne conducively to the new generation Sunway supercomputer (SW26010pro) and accelerated the software hotspots the software hotspots by 1-2 times. After optimizing and porting, this software has successfully served in the numerical simulation of the lateral flow of fuel assemblies in the nuclear industry. © 2023 IEEE.

关键词： Supercomputers

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Massively Parallel Approach of Multilevel Fast Multipole Algorithm on DCU Clusters for Large Electromagnetic Scattering problems 4

Massively Parallel Approach of Multilevel Fast Multipole Alg...

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4th International Applied Computational Electromagnetics Society Symposium in China, ACES-China 2021

作者： He, We-Jia Kong, Yi-Nan He, Kai-Feng Yang, Ming-Lin Sheng, Xin-Qing Center for Electromagnetic Simulation School of Information and Electronics Beijing Institute of Technology Beijing100081 China State Key Laboratory of Aerodynamic China Aerodynamics Research and Development Center Mianyang621000 China

ISBN: (纸本)9781733509619

A massively parallel approach of the multilevel fast multipole algorithm (MLFMA) on Deep Computing Unit (DCU) clusters using the Heterogeneous Interface for Portability (HIP) programming model and the Message Passing Interface (MPI) is presented (DCU-MLFMA). The proposed MPI-based multi-DCU parallel implementation is capable of solving challenging problems involving billions of unknowns with a significant speedup, compared with the conventional CPU-based ternary parallelization approach of MLFMA (CPU-MLFMA). Numerical results, including a ship model with length about 6000 wavelengths modeled with 2.6 billion unknowns, are given to demonstrate the capability, as well as the efficiency of the presented method. © 2021 Applied Computational Electromagnetics Society (ACES).

关键词： Message passing

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