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Temporal-spatial risk assessment of COVID-19 under the influence of urban spatial environmental parameters:The case of Shenyang city

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Building Simulation 2023年第5期16卷 683-699页

作者： Sui Li Zhe Li Yixin Dong Tiemao Shi Shiwen Zhou Yumeng Chen Xun Wang Feifei Qin School of Architecture and Planning Shenyang Jianzhu UniversityShenyangLiaoning 110168China institute of ecological Urban Planning and Green Building Shenyang Jianzhu UniversityShenyangLiaoning 110168China School of Architecture Tianjin UniversityTianjin 300072China institute of Spatial Planning and design Shenyang Jianzhu UniversityShenyangLiaoning 110168China School of science Shenyang Jianzhu UniversityShenyangLiaoning 110168China

Respiratory infection is the main route for the transmission of coronavirus pneumonia,and the results have shown that the urban spatial environment significantly influences the risk of *** on the Wells-Riley model of respiratory infection probability,the study determined the human respiratory-related parameters and the effective influence range;extracted urban morphological parameters,assessed the ventilation effects of different spatial environments,and,combined with population flow monitoring data,constructed a method for assessing the risk of Covid-19 respiratory infection in urban-scale grid *** the empirical study in Shenyang city,a severe cold region,urban morphological parameters,population size,background wind speed,and individual behavior patterns were used to calculate the distribution characteristics of temporal and spatial concomitant risks in urban areas grids under different *** results showed that the correlation between the risk of respiratory infection in urban public spaces and the above variables was *** exposure time had the greatest degree of influence on the probability of respiratory infection risk among the *** the same time,the change in human body spacing beyond 1 m had a minor influence on the risk of *** the urban morphological parameters,building height had the highest correlation with the risk of infection,while building density had the lowest *** actual point distribution of the epidemic in Shenyang from March to April 2022 was used to verify the evaluation *** overlap rate between medium or higher risk areas and actual cases was 78.55%.The planning strategies for epidemic prevention and control were proposed for the spatial differentiation characteristics of different risk *** research results can accurately classify the risk level of urban space and provide a scientific basis for the planning response of epidemic prevention and control and the sa

关键词： COVID-19 virus infection rate GIS data simulations urban morphological parameters analysis infection risk assessment epidemic containment planning

Co-present Pb(Ⅱ)accelerates the oxidation of organic contaminants by permanganate:Role of Pb(Ⅲ)

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Frontiers of environmental science & Engineering 2022年第8期16卷 257-267页

作者： Lei Dong Pin Xie Xin Zhang Junlian Qiao Dandan Rao Yuankui Sun Xiaohong Guan College of environmental science and Engineering Tongji UniversityShanghai 200092China Shanghai Municipal Engineering design institute(group)Co. Ltd.Shanghai 200092China Shanghai Key Laboratory for Urban ecological Processes and Eco-Restoration Shanghai Engineering Research Center of Biotransformation of Organic Solid WasteInstitute of Eco-Chongming(IEC)School of Ecological and Environmental ScienceEast China Normal UniversityShanghai 200241China

The permanganate(Mn(VII))oxidation has emerged as a promising technology for the remediation and treatment of the groundwater and surface water contaminated with the organic ***,only a few studies have been conducted to explore the role of the heavy metals(especially the redox-active ones)during the Mn(VII)oxidation *** this study,taking Pb(II)as an example,its influence on the Mn(VII)decontamination performance has been extensively *** was found that,with the presence of Pb(II),Mn(VII)could degrade diclofenac(DCF),2,4-dichlorophenol,and aniline more effectively than *** instance,over a wide pH range of 4.5–8.0,the dosing of 10μmol/L Pb(II)accelerated the DCF removal rate from 0.006–0.25 min–1 to 0.05–0.46 min–1 with a promotion factor of 1.9–*** the UV-vis spectroscopic and high resolution transmission electron microscopy analyses suggested that Mn(VII)could react with Pb(II)to produce Mn(IV)and Pb(IV)at pH 6.0–8.0,further experiments revealed that Pb(II)did not exert its enhancing effect through promoting the generation of MnO_(2),as the reactivity of MnO_(2)was poor under the employed pH *** pH below 5.0,it was interesting to find that,a negligible amount of MnO_(2)was formed in the Mn(VII)/Pb(II)system in the absence of contaminants,while once MnO_(2)was generated in the presence of contaminants,it could catalyze the Pb(II)oxidation to Pb(IV)by Mn(VII).Collectively,by highlighting the conversion process of Pb(II)to Pb(IV)by either Mn(VII)or MnO_(2),the reactive Pb(III)intermediates were proposed to account for the Pb(II)enhancement effect.

关键词： Permanganate Pb(II)oxidation MnO_(2) pH effect

The plant-enhanced bio-cathode:Root exudates and microbial community for nitrogen removal

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Journal of environmental sciences 2019年第3期31卷 97-103页

作者： Henan Li Youpeng Qu Yan Tian Yujie Feng School of environment Harbin Institute of Technology State Key Laboratory of Urban Water Resource and environment Harbin Institute of Technology School of Life science and Technology Harbin Institute of Technology Heilongjiang Academy of Chemical Engineering Harbin FengGe ecological environmental science and Technology Company

A plant bio-electrochemical system(PBES) was constructed for organic pollutant removal and power generation. The bio-cathode, composed of granular activated carbon(GAC), stainless wire mesh and a plant species(Triticum aestivum L.), was able to catalyze cathodic reactions without any requirement for aeration or power input. During the 60-day-long operation, an average voltage of 516 m V(1000 Ω) and maximum power density(Pmax) of 0.83 W/m^3 were obtained in the PBES. The total nitrogen removal and total organic carbon removal in the PBES were 85% and 97%, respectively. Microbial community analyses indicated that bacteria associated with power generation and organic removal were the predominant species in the bio-cathode, and plant-growth-promoting rhizobacteria were also found in the PBES. The results suggested that the coupling of plants with the GAC cathode may enhance the organicmatter degradation and energy generation from wastewater and therefore provide a new method for bio-cathode design and promote energy efficiency.

关键词： Plant bio-electrochemical system Bio-cathode Root exudates Nitrogen removal

Optimal design of building openings to reduce the risk of indoor respiratory epidemic infections

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Building Simulation 2022年第5期15卷 871-884页

作者： Yixin Dong Li Zhu Sui Li Martin Wollensak School of Architecture Tianjin UniversityTianjin300072China School of Architecture and design Hochschule WismarWismar23966Germany APEC Sustainable Energy Center Asia-Pacific Economic Cooperation(APEC)National Energy Administration(NEA)of ChinaTianjin300072China ecological Planning and Green Building research institute Shenyang Jianzhu UniversityShenyang110168China

The design of indoor airflow environments can significantly reduce the risk of respiratory epidemic infections *** studies have successfully developed theoretical models for calculating the effect of airflow fields on infection ***,up until now,studies have primarily focused on simulating and calculating the distribution of viral infection rates in current building *** to the lack of a direct influence model for the design parameters and infection rate calculation,the present studies lack a quantitative analysis of the design *** paper investigates the building openings design approach in a medium-sized kindergarten in Germany,intending to explore passive-based design solutions to improve the building's ability to prevent the virus'*** calculate the infection rate distribution in space by CFD combined with the Wells-Riley *** then,use the Grasshopper platform to build an optimization model with the design parameters of building openings and infection rate values to discuss the relationship between geometric parameters and infection rate *** results show that the building openings'design parameters in transition spaces significantly affect the indoor infection rate under the condition that the input wind speed at the building openings is *** can see that optimizing building openings significantly reduces the average infection rate in *** infection rate in the area with the largest decrease can be reduced by 18.41%.The distribution of infection rate in space is much more uniform,and the excess area is significantly *** study has implications for future research and practice in designing public buildings under the influence of long-standing and cyclical outbreaks of epidemics.

关键词： virus infection rate building openings parameter optimization transition spaces COVID-19 parametric simulation

Tracking the historical urban development by classifying Landsat MSS data with training samples migrated across time and space

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International Journal of Digital Earth 2023年第1期16卷 2487-2502页

作者： Zemin Feng Yuqing Liu Yan Shi Jun Yang Department of Earth System science Institute for Global Change StudiesMinistry of Education Ecological Field Station for East Asian Migratory BirdsTsinghua UniversityBeijingPeople’s Republic of China Anhui Urban&Rural Planning and design institute Co. Ltd.HefeiPeople’s Republic of China Beijing Hanbolin institute of Surveying and Mapping BeijingPeople’s Republic of China

To reveal the historical urban development in large areas using satellite data such as Landsat MSS still need to overcome many *** of them is the need for high-quality training *** study tested the feasibility of migrating training samples collected from Landsat MSS data across time and *** migrated training samples collected for Washington,*** 1979 to classify the city’s land covers in 1982 and *** classifier trained with Washington,D.C.’s samples were used in classifying Boston’s and Tokyo’s land *** results showed that the overall accuracies achieved using migrated samples in 1982(66.67%)and 1984(65.67%)for Washington,*** comparable to that of 1979(68.67%)using a random forest *** of training samples between cities in the same urban ecoregion,***,D.C.,and Boston,achieved higher overall accuracy(59.33%)than cities in the different ecoregions(Tokyo,50.33%).We concluded that migrating training samples across time and space in the same urban ecoregion are *** can contribute to using Landsat MSS data to reveal the historical urbanization pattern on a global scale.

关键词： Land cover classifier training samples Landsat MSS KH-9

Biodegradation of Lubricating Oil in Wastewater with Zoogloea sp.

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Pedosphere 2006年第4期16卷 540-544页

作者： JIN Liang WANG Xiao-Juan GU Zong-Lian ZHOU De-Zhi XIE Si-Qin College of Pastoral Agriculture science and Technology Lanzhou University Gansu Grassland Ecological Research Institute P.O. Box 61 Lanzhou 730020 （China）. institute of Soil science Chinese Academy of Sciences Nanjing 210008 （China）

The purpose of this study was to identify microbial strains that have a strong ability to biodegrade lubricating oil. No. 20 lubricating oil was used as the sole carbon source in an isolation medium to screen bacteria from sludge that had been contaminated with crude oil. Through both morphological and biochemical methods, the bacterial strain that had the highest biodegrading capacity was identified as Zoogloea sp. On the basis of these preliminary results, a biological contact oxidation method was employed to further assess the ability of the Zoogloea sp. strain to treat wastewater contaminated by No. 20 lubricating oil using three oxidation cabins and two hydraulic retaining times (HRT). Results showed that the concentration of No. 20 lubricating oil with a 12 h hydraulic retaining time and 16.5 L h-1 inflow rate was reduced by 99.3% in 15 d, and with a 6 h hydraulic retaining time and 33 L h-1 inflow rate it decreased by 98.6% in 12 d. The results from this study indicated that Zoogloea sp. had a strong potential to be utilized in biodegradation of lubricating oil.

关键词：生物降解生物接触氧化润滑土废水

Facet effect on the reconstructed Cu-catalyzed electrochemical hydrogenation of 5-hydroxymethylfurfural(HMF) towards 2,5-bis(hydroxymethy)furan (BHMF)

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Journal of Energy Chemistry 2023年第9期84卷 101-111页

作者： Mengxia Li Tianxi Zheng Dongfei Lu Shiwei Dai Xin Chen Xinchen Pan Dibo Dong Rengui Weng Gang Xu Fanan Wang Fujian Provincial Key Laboratory of Advanced Materials Oriented Chemical Engineering College of Chemistry and Material ScienceFujian Normal UniversityFuzhou 350007FujianChina Fujian Provincial Key Laboratory of Polymer Materials College of Chemistry and Materials ScienceFujian Normal UniversityFuzhou 350007FujianChina Fujian Eco-materials Engineering research Center School of Ecological Environment and Urban ConstructionFujian University of TechnologyFuzhou 350118FujianChina institute of Smart Marine and Engineering Fujian University of TechnologyFuzhou 350118FujianChina

The electrochemical hydrogenation of HMF to BHMF is an elegant alternative to the conventio nal thermocatalytic route for the production of high-value-added chemicals from biomass *** virtue of the wide potential window with promising Faradic efficiency(FE) towards BHMF,Cu-based electrode has been in the center of ***,its structure-activity relationship remains ambiguous and its intrinsic catalytic activity is still *** this work,we develop a two-step oxidation-reduction strategy to reconstruct the surface atom arrangement of the Cu foam(CF).By combination of multiple quasi-situ/in-situ techniques and density functional theory(DFT) calculation,the critical factor that governs the reaction is demonstrated to be facet effect of the metallic Cu crystal:Cu(110) facet accounts for the most favorable surface with enhanced chemisorption with reactants and selective production of BHMF,while Cu(100) facet might trigger the accumulation of the by-product 5,5'-bis(hydroxy methy)hydrofurion(BHH).With the optimized composition of the facets on the reconstructed Cu(OH)_(2)-ER/CF,the performance could be noticeably enhanced with a BHMF FE of 92.3% and HMF conversion of 98.5% at a potential of -0.15 V versus reversible hydrogen electrode(***) in 0.1 M KOH *** work sheds light on the incomplete mechanistic puzzle for Cu-catalyzed electrochemical hydrogenation of HMF to BHMF,and provides a theoretical foundation for further precise design of highly efficient catalytic electrodes.

关键词： Electrochemical hydrogenation Biomass conversion 5-hydroxymethylfurfural Cu electrode Facet effect

Regulation Mechanisms of Stomatal Oscillation

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Journal of Integrative Plant Biology 2005年第10期47卷 1159-1172页

作者： Hui-Min YANG Jian-Hua ZHANG Xiao-Yan ZHANG Department of Biology Hong Kong Baptist University Hong Kong SAR China School of Pastoral Agriculture science and Technology Lanzhou University Gansu Grassland Ecological Research Institute Lanzhou 730020 Chin

Stomata function as the gates between the plant and the atmospheric environment. Stomatal movement, including stomatal opening and closing, controls CO2 absorption as the raw material for photosynthesis and water loss through transpiration. How to reduce water loss and maintain enough CO2 absorption has been an interesting research topic for some time. Simple stomatal opening may elevate CO2 absorption, but, in the meantime, promote the water loss, whereas simple closing of stomatal pores may reduce both water loss and CO2 absorption, resulting in impairment of plant photosynthesis. Both processes are not economical to the plant. As a special rhythmic stomatal movement that usually occurs at smaller stomatal apertures, stomatal oscillation can keep CO2 absorption at a sufficient level and reduce water loss at the same time, suggesting a potential improvement in water use efficiency. Stomatal oscillation is usually found after a sudden change in one environmental factor in relatively constant environments. Many environmental stimuli can induce stomatal oscillation. It appears that, at the physiological level, feedback controls are involved in stomatal oscillation. At the cellular level, possibly two different patterns exist：（i） a quicker responsive pattern; and （ii） a slower response. Both involve water potential changes and water channel regulation, but the mechanisms of regulation of the two patterns are different. Some evidence suggests that the regulation of water channels may play a vital and primary role in stomatal oscillation. The present review summarizes studies on stomatal oscillation and concludes with some discussion regarding the mechanisms of regulation of stomatal oscillation.

关键词： Ca^2+ signaling guard cell plant stress signaling plant water relation stomatal oscillation water channel.

Determination and analysis of basic physical and contact mechanics parameters of quinoa seeds by DEM

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International Journal of Agricultural and Biological Engineering 2023年第5期16卷 35-43页

作者： Linrong Shi Wuyun Zhao Bugong Sun Wei Sun Gang Zhou College of Mechanical and Electrical Engineering Gansu Agricultural UniversityLanzhou 730070China institute of Dryland Agriculture Gansu Academy of Agricultural SciencesLanzhou 730070China

Quinoa is an ancient crop that is nutritious,balanced,and suitable for most ***,it has not been known and sought by the public until modern *** recent years,quinoa has been intensively known and widely grown in *** mechanized production machines have also been *** the help of DEM,we design and optimize the quinoa combined seeder,improving seeding efficiency and *** this paper,the basic physical and contact mechanics parameters required for the Hertz-Mindlin(no slip)of quinoa seeds in EDEM software were *** coefficient of rolling friction of quinoa seeds was calibrated on DEM,and which of Long Quinoa 4 is 0.043,and that of Meng Quinoa 4 was ***,we can find that the coefficient of rolling friction strengthens the shape to restrict rolling and weakens the shape to increase *** above research provides simulation parameters for the design and optimization of quinoa seed seeding machinery.

关键词： quinoa seeds physical parameters contact parameters calibration DEM