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Accelerated haze removal for a single image by dark channel prior Research Articles

Bo-xuan YUE, Kang-ling LIU, Zi-yang WANG, Jun LIANG

Frontiers of Information Technology & Electronic Engineering 2019, Volume 20, Issue 8,   Pages 1109-1118 doi: 10.1631/FITEE.1700148

Abstract: Haze scatters light transmitted in the air and reduces the visibility of images.Dealing with haze is still a challenge for image processing applications nowadays.For the purpose of haze removal, we propose an accelerated dehazing method based on single pixels.

Keywords： Haze removal     Dark channel prior     Hazy image model     Bilateral filtering    

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Characterization of bacterial communities during persistent fog and haze events in the Qingdao coastal

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 3, doi: 10.1007/s11783-020-1334-x

Abstract:

• Light haze had little effect on bacterial communities.

Keywords： Bacterial community     Persistent fog and haze     Particle size    

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Modeling radiative effects of haze on summer-time convective precipitation over North China: a case study

Xuying WANG, Bin ZHANG

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 4, doi: 10.1007/s11783-016-0840-3

Abstract: We modeled the impact of haze radiative effects on precipitation in North China.Shortwave heating induced by haze radiative effects would reduce heavy rainfalls.The impact of haze radiative effect on summertime 24-h convective precipitation over North China wasThe haze radiative effect was represented by incorporating an idealized aerosol optical profile, withHaze weakened the convection over places with precipitation suppression exceeding 30 mm and caused less

Keywords： Haze     Aerosol radiative effects     Convective precipitation    

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Secondary aerosol formation in winter haze over the Beijing-Tianjin-Hebei Region, China

Dongjie Shang, Jianfei Peng, Song Guo, Zhijun Wu, Min Hu

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 2, doi: 10.1007/s11783-020-1326-x

Abstract: . • Mechanisms of secondary aerosol formation in winter haze of North China are reviewed. • DirectionsSevere haze pollution occurs frequently in the winter over the Beijing-Tianjin-Hebei (BTH) region (ChinaHowever, the level of secondary aerosols during heavy haze episodes showed little decrease during thisThis paper reviews the research progress in aerosol chemistry during haze pollution episodes in the BTHregion, lays out the challenges in haze formation studies, and provides implications and directions

Keywords： Secondary aerosol formation     Regional haze     Photochemical reaction     Aqueous reaction     Chemical mechanism    

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Discussions in prediction and precaution about haze

Zhang Kui

Strategic Study of CAE 2015, Volume 17, Issue 1,   Pages 103-113

Abstract: weather， using digital information method found the relationship between occurrence， development of hazePrediction and precaution of haze need to correctly grasp tumble state of the lower atmosphere near theThe formation of haze both has anthropogenic emissions also has the release of underground pollutantsAnd geothermal can be taken as premonitory information of haze weather forecast.

Keywords： visibility； haze； digital information prediction method； precaution    

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Local and regional contributions to PM in the Beijing 2022 Winter Olympics infrastructure areas during haze

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 6, doi: 10.1007/s11783-021-1434-2

Abstract: List>

• Regional transportation contributed more than local emissions during haze

Keywords： 2022 Winter Olympics     PM2.5     Source apportionment    

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Improving simulations of sulfate aerosols during winter haze over Northern China: the impacts of heterogeneous

Meng Gao,Gregory R. Carmichael,Yuesi Wang,Dongsheng Ji,Zirui Liu,Zifa Wang

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 5, doi: 10.1007/s11783-016-0878-2

Abstract: The newly added reaction reproduces sulfate concentrations well during winter haze.We implemented the online coupled WRF-Chem model to reproduce the 2013 January haze event in North Chinaheterogeneous oxidation of dissolved SO by nitrogen dioxide (NO ) on sulfate formation during winter haze

Keywords： Sulfate aerosols     Winter haze     WRF-Chem     Northern China    

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Characteristics and mixing state of S-rich particles in haze episodes in Beijing

Jun Hu, Fengkui Duan, Kebin He, Yongliang Ma, Shuping Dong, Xiande Liu

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 5, doi: 10.1007/s11783-016-0861-y

Abstract: with online observation was conducted to examine the S-rich particles in PM of two typical polluted haze

Keywords： S-rich particles     Morphology     Element distribution     Mixing state    

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Formation of secondary inorganic aerosol in a frigid urban atmosphere

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 2, doi: 10.1007/s11783-021-1452-0

Abstract:

•Harbin showed relatively high threshold RH (80%) for apparent increase of SOR.

Keywords： Haze     Sulfate     Nitrate     Heterogeneous chemistry     Biomass burning     Northeast China    

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Environmental and Dynamic Conditions for the Occurrence of Persistent Haze Events in North China

Yihui Ding,Ping Wu,Yanju Liu,Yafang Song

Engineering 2017, Volume 3, Issue 2,   Pages 266-271 doi: 10.1016/J.ENG.2017.01.009

Abstract:

This paper presents a concise summary of recent studies on the long-term variations of haze in NorthChina and on the environmental and dynamic conditions for severe persistent haze events.Results indicate that haze days have an obviously rising trend over the past 50 years in North China.The occurrence frequency of persistent haze events has a similar rising trend due to the continuous riselower troposphere, providing sufficient moisture for the formation of haze.

Keywords： North China     Persistent haze events     Environmental conditions     Dynamic conditions    

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Influence of Human Activities on Wintertime Haze-Related Meteorological Conditions over the Jing–Jin–Ji Article

Ying Xu, Yanju Liu, Zhenyu Han, Botao Zhou, Yihui Ding, Jie Wu, Tongfei Tian, Rouke Li, Jing Wang

Engineering 2021, Volume 7, Issue 8,   Pages 1185-1192 doi: 10.1016/j.eng.2020.03.015

Abstract: and discusses the influence of human activities on the meteorological conditions related to winter hazehuman activities, the changes in dynamical and thermal meteorological conditions related to winter hazeevents in the Jing–Jin–Ji region are conducive to the formation and accumulation of hazeThe relative contribution of dynamical and thermal conditions to the variation of haze days in the JingTo be specific, the dynamical meteorological factors contribute more to the haze days than the thermal

Keywords： Meteorological conditions     Human activities     Haze     Jing–Jin–Ji region    

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Research progress in removal of trace carbon dioxide from closed spaces

ZHANG Yatao, FAN Lihai, ZHANG Lin, CHEN Huanlin

Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 3,   Pages 310-316 doi: 10.1007/s11705-007-0057-x

Abstract: In this paper, the removal of trace carbon dioxide from closed spaces through membrane process and biotransformationIt is found that higher CO removal efficiency can be obtained in biotransformation and membrane process

Keywords： removal efficiency     consumption     removal     CO removal     membrane microalgae    

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Removal of SO

Xiaolei LI, Chunying ZHU, Youguang MA

Frontiers of Chemical Science and Engineering 2013, Volume 7, Issue 2,   Pages 185-191 doi: 10.1007/s11705-013-1326-5

Abstract: In this work, the removal of SO from gas mixture with air and SO by ammonium bicarbonate aqueous solutionconcentration of ammonium bicarbonate, the SO inlet concentration of gas phase and the gas flow rate on the removalshorter the lasting time of SO completely removed in gas outlet, and then the faster the decrease in the removalsolution pH was less than the critical pH, it would sharply fall, resulting in a rapid decrease of the SO removalA theoretical model for predicting the SO removal rate has been developed by taking the chemical enhancement

Keywords： SO2 removal     bubble column reactor     removal rate     ammonium bicarbonate     absorbent    

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Scrap Iron Filings assisted nitrate and phosphate removal in low C/N waters using mixed microbial culture

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 4, doi: 10.1007/s11783-020-1358-2

Abstract:

• Microbes enhance denitrification under varying DO concentrations and SIF dosages.

Keywords： Scrap iron filing     Nitrate removal     Phosphate removal     Mixed culture denitrification     Zero valent iron    

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Mercury removal from flue gas using nitrate as an electron acceptor in a membrane biofilm reactor

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 2, doi: 10.1007/s11783-021-1454-y

Abstract:

Membrane bioreactor achieved mercury removal using nitrate as an electron

Keywords： Mercury removal     Oxygen     Ferrous sulfide     Transformation of mercury     Microbial community    

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Title Author Date Type Operation

Accelerated haze removal for a single image by dark channel prior

Bo-xuan YUE, Kang-ling LIU, Zi-yang WANG, Jun LIANG

Journal Article

Characterization of bacterial communities during persistent fog and haze events in the Qingdao coastal

Journal Article

Modeling radiative effects of haze on summer-time convective precipitation over North China: a case study

Xuying WANG, Bin ZHANG

Journal Article

Secondary aerosol formation in winter haze over the Beijing-Tianjin-Hebei Region, China

Dongjie Shang, Jianfei Peng, Song Guo, Zhijun Wu, Min Hu

Journal Article

Discussions in prediction and precaution about haze

Zhang Kui

Journal Article

Local and regional contributions to PM in the Beijing 2022 Winter Olympics infrastructure areas during haze

Journal Article

Improving simulations of sulfate aerosols during winter haze over Northern China: the impacts of heterogeneous

Meng Gao,Gregory R. Carmichael,Yuesi Wang,Dongsheng Ji,Zirui Liu,Zifa Wang

Journal Article

Characteristics and mixing state of S-rich particles in haze episodes in Beijing

Jun Hu, Fengkui Duan, Kebin He, Yongliang Ma, Shuping Dong, Xiande Liu

Journal Article

Formation of secondary inorganic aerosol in a frigid urban atmosphere

Journal Article

Environmental and Dynamic Conditions for the Occurrence of Persistent Haze Events in North China

Yihui Ding,Ping Wu,Yanju Liu,Yafang Song

Journal Article

Influence of Human Activities on Wintertime Haze-Related Meteorological Conditions over the Jing–Jin–Ji

Ying Xu, Yanju Liu, Zhenyu Han, Botao Zhou, Yihui Ding, Jie Wu, Tongfei Tian, Rouke Li, Jing Wang

Journal Article

Research progress in removal of trace carbon dioxide from closed spaces

ZHANG Yatao, FAN Lihai, ZHANG Lin, CHEN Huanlin

Journal Article

Removal of SO

Xiaolei LI, Chunying ZHU, Youguang MA

Journal Article

Scrap Iron Filings assisted nitrate and phosphate removal in low C/N waters using mixed microbial culture

Journal Article

Mercury removal from flue gas using nitrate as an electron acceptor in a membrane biofilm reactor

Journal Article