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The 2023 report of the synergetic roadmap on carbon neutrality and clean air for China: Carbon reduction, pollution mitigation, greening, and growth

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Environmental Science and Ecotechnology 2025年第1期23卷 1-18页

作者： Jicheng Gong Zhicong Yin Yu Lei Xi Lu Qiang Zhang Cilan Cai Qimin Chai Huopo Chen Renjie Chen Wenhui Chen Jing Cheng Xiyuan Chi Hancheng Dai Zhanfeng Dong Guannan Geng Jianlin Hu Shan Hu Cunrui Huang Tiantian Li Wei Li Xiaomei Li Yongsheng Lin Jun Liu Jinghui Ma Yue Qin Weiqi Tang Dan Tong Jiaxing Wang Lijuan Wang Qian Wang Xuhui Wang Xuying Wang Libo Wu Rui Wu Qingyang Xiao Yang Xie Xiaolong Xu Tao Xue Haipeng Yu Da Zhang Li Zhang Ning Zhang Shaohui Zhang Shaojun Zhang Xian Zhang Zengkai Zhang Hongyan Zhao Bo Zheng Yixuan Zheng Tong Zhu Huijun Wang Jinnan Wang Kebin He State Key Joint Laboratory for Environment Simulation and Pollution Control College of Environmental Sciences and Engineering and Center for Environment and HealthPeking UniversityBeijing100871China Key Laboratory of Meteorological Disaster Ministry of Education/Joint International Research Laboratory of Climate and Environment Change(ILCEC)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD)Nanjing University of Information Science&TechnologyNanjing210044China Center of Air Quality Simulation and System Analysis Chinese Academy of Environmental PlanningBeijing100041China Center for Carbon Neutrality Chinese Academy of Environmental PlanningBeijing100041China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing100084China Institute for Carbon Neutrality Tsinghua UniversityBeijing100084China Ministry of Education Key Laboratory for Earth System Modelling Department of Earth System ScienceTsinghua UniversityBeijing100084China National Center for Climate Change Strategy and International CooperationBeijing100035China Nansen-Zhu International Research Centre Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing100029China School of Public Health Key Lab of Public Health Safety of the Ministry of Education and Key Lab of Health Technology Assessment of the Ministry of HealthFudan UniversityShanghai200032China School of Economics and Management Beijing University of Chemical TechnologyBeijing100029China Department of Earth System Science University of CaliforniaIrvineIrvineCA92697USA National Meteorological Center China Meteorological AdministrationBeijing100081China College of Environmental Sciences and Engineering Peking UniversityBeijing100871China Institute of Eco-Environmental Management and Policy Chinese Academy of Environmental PlanningBeijing100041China Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Contr

The response to climate change and air pollution control demonstrates strong synergy across scientific mechanisms,targets,strategies,and governance *** report,based on a monitoring indicator system for coordinated governance of air pollution and climate change,employs an interdisciplinary approach combining natural and social *** establishes 20 indicators across five key areas:air pollution and climate change,governance systems and practices,structural transformation and technologies,atmospheric components and emission reduction pathways,and health impacts and *** report tries to provide actionable insights into the interconnectedness of air pollution and climate *** highlights key policy gaps,presents updated indicators,and offers a refined monitoring framework to track progress toward China's dual goals of reducing emissions and improving air *** to previous editions,this year's report has updated four key indicators:meteorological impacts on air quality,climate change and its effects,governance policies,and low-carbon building energy *** aim is to further refine the monitoring framework,track progress,and establish a comprehensive theory for collaborative governance while identifying challenges and proposing solutions for China's pathway to carbon neutrality and clean *** report comprises six *** executive summary chapter is followed by analyzing air pollution and climate change *** systems and practices are discussed in the third chapter,focusing on policy implementation and local *** fourth chapter addresses structural transformations and emission reduction technologies,including energy and industrial shifts,transportation,low-carbon buildings,carbon capture and storage,and power *** fifth chapter outlines atmospheric component dynamics and emission pathways,presenting insights into emission drivers and future *** sixth chapter assesses he

关键词： Synergetic roadmap Carbon neutrality Clean air

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The 2022 report of synergetic roadmap on carbon neutrality and clean air for China:Accelerating transition in key sectors

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Environmental Science and Ecotechnology 2024年第3期19卷 4-18页

作者： Yu Lei Zhicong Yin Xi Lu Qiang Zhang Jicheng Gong Bofeng Cai Cilan Cai Qimin Chai Huopo Chen Renjie Chen Shi Chen Wenhui Chen Jing Cheng Xiyuan Chi Hancheng Dai Xiangzhao Feng Guannan Geng Jianlin Hu Shan Hu Cunrui Huang Tiantian Li Wei Li Xiaomei Li Jun Liu Xin Liu Zhu Liu Jinghui Ma Yue Qin Dan Tong Xuhui Wang Xuying Wang Rui Wu Qingyang Xiao Yang Xie Xiaolong Xu Tao Xue Haipeng Yu Da Zhang Ning Zhang Shaohui Zhang Shaojun Zhang Xian Zhang Xin Zhang Zengkai Zhang Bo Zheng Yixuan Zheng Jian Zhou Tong Zhu Jinnan Wang Kebin He Center of Air Quality Simulation and System Analysis Chinese Academy of Environmental PlanningBeijing100041China Center for Carbon Neutrality Chinese Academy of Environmental PlanningBeijing100041China Key Laboratory of Meteorological Disaster Ministry of Education/Joint International Research Laboratory of Climate and Environment Change(ILCEC)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD)Nanjing University of Information Science&TechnologyNanjing210044China State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing100084China Institute for Carbon Neutrality Tsinghua UniversityBeijing100084China Ministry of Education Key Laboratory for Earth System Modelling Department of Earth System ScienceTsinghua UniversityBeijing100084China State Key Joint Laboratory for Environment Simulation and Pollution Control College of Environmental Sciences and Engineering and Center for Environment and HealthPeking UniversityBeijing100871China National Center for Climate Change Strategy and International CooperationBeijing100035China Nansen-Zhu International Research Centre Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing100029China School of Public Health Key Lab of Public Health Safety of the Ministry of Education and Key Lab of Health Technology Assessment of the Ministry of HealthFudan UniversityShanghai200032China School of Economics and Management Beijing University of Chemical TechnologyBeijing100029China Department of Earth System Science University of CaliforniaIrvineCA92697USA National Meteorological Center China Meteorological AdministrationBeijing100081China College of Environmental Sciences and Engineering Peking UniversityBeijing100871China Policy Research Center for Environment and Economy Ministry of Ecology and Environment of the People's Republic of ChinaBeijing100029China Jiangsu Key Laboratory of Atmospheric Environment Monitoring

China is now confronting the intertwined challenges of air pollution and climate *** the high synergies between air pollution abatement and climate change mitigation,the Chinese government is actively promoting synergetic control of these two *** Synergetic Roadmap project was launched in 2021 to track and analyze the progress of synergetic control in China by developing and monitoring key *** Synergetic Roadmap 2022 report is the first annual update,featuring 20 indicators across five aspects:synergetic governance system and practices,progress in structural transition,air pollution and associated weather-climate interactions,sources,sinks,and mitigation pathway of atmospheric composition,and health impacts and benefits of coordinated *** to the comprehensive review presented in the 2021 report,the Synergetic Roadmap 2022 report places particular emphasis on progress in 2021 with highlights on actions in key sectors and the relevant *** milestones include the proportion of non-fossil power generation capacity surpassing coal-fired capacity for the first time,a decline in the production of crude steel and cement after years of growth,and the surging penetration of electric ***,in 2022,China issued the first national policy that synergizes abatements of pollution and carbon emissions,marking a new era for China's pollution-carbon *** changes highlight China's efforts to reshape its energy,economic,and transportation structures to meet the demand for synergetic control and sustainable ***,the country has witnessed a slowdown in carbon emission growth,improved air quality,and increased health benefits in recent years.

关键词： Synergetic roadmap Carbon neutrality Clean air

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Gap effects on the aerodynamic characteristics and flow patterns of a long-span rail-cum-road bridge girder with three separated boxes

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Journal of Wind Engineering and Industrial Aerodynamics 2025年 264卷

作者： Yize Ran Wen-Li Chen Hui Li Donglai Gao Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education Harbin Institute of Technology Harbin 150090 China Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology Harbin Institute of Technology Harbin 150090 China State Key Laboratory for Strength and Vibration of Mechanical Structures School of Aerospace Engineering Xi’an Jiaotong University Xi’an 710049 China

Separated box girder configurations enhance flutter stability in long-span bridges but introduce more complex flow interactions within the gaps, potentially inducing vortex-induced vibrations (VIV) at lower wind velocities. This study investigates the effects of gap ratios ( G / H ) on the aerodynamic characteristics and flow patterns of a long-span rail-cum-road bridge girder with three separated boxes. Stationary wind tunnel tests were conducted for G / H ranging from 0.000 to 7.752. Combined time–frequency analysis, pressure measurements, and smoke–wire visualizations revealed distinct flow characteristics for various gap ratio cases. As G / H increased, the upstream and middle box girders successively influenced the flow through vortex impingement on the windward sides of the downstream box girders. When G / H exceeded a critical threshold, the dominant frequency of the wake flow behind the downstream box girder became pronounced, indicating a general reduction in the influence of the upstream wake. The surface pressure distributions corroborated the observed vortex dynamics. Four distinct gap flow patterns were categorized: Pattern A exhibited overshoot flows in both upstream and downstream gaps for G / H = 0 . 000 to 0.678; Pattern B featured shear layer impingement in the upstream gap combined with vortex impingement in the downstream gap for G / H = 0 . 775 to 1.260; Pattern C displayed vortex impingement in the upstream gap and a secondary vortex street in the downstream gap for G / H = 1 . 357 to 1.841; Pattern D demonstrated alternate vortex shedding in both upstream and downstream gaps for G / H = 1 . 938 to 7.752. The phase lag between the fluctuating lift coefficients of adjacent box girders and the spanwise coherence coefficient elucidated the aerodynamic characteristics of the three-box girder under different gap flow patterns.

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High strength concrete-filled cold-formed high strength steel built-up box-section stub columns: Testing, numerical modeling and design

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Thin-Walled Structures 2025年 214卷

作者： Zhang, Jiahao Yang, Hua Jiang, Ke Su, Andi Key Lab of Structures Dynamic Behaviour and Control of the Ministry of Education Harbin Institute of Technology Harbin150090 China Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology Harbin Institute of Technology Harbin150090 China State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures Guangxi Nanning530004 China Department of Civil and Natural Resources Engineering University of Canterbury Christchurch New Zealand

This paper reports testing and numerical modeling program on high strength concrete-filled S700 cold-formed high strength steel (HCFHSS) built-up box-section stub columns to investigate their cross-sectional behavior and resistance. Twelve stub column tests were performed on HCFHSS built-up box-sections designed with three grades of high strength concretes, i.e. C60, C90 and C120. The ultimate loads, axial load–end shortening curves and failure modes of all test specimens were reported. The numerical program was then performed, in which stub column finite element models were developed and validated against the experimental observations, accounting for the confinement effect. Parametric studies incorporating 160 finite models were carried out for generating further numerical data. The test and numerical results were used to evaluate the applicability of the existing European Code (EC4), American Specification (AISC) and Chinese standard (GB) to HCFHSS built-up box-sections. The EC4 yielded overly conservative yet consistent predictions with a mean overprediction of 32 %, while the AISC design provisions were generally conservative by 26 % on average and exhibited notable inaccuracy, particularly for slender sections. In contrast, the GB design provisions provided the most accurate but unsafe predictions. To address the shortcomings, modified design provisions were thus proposed for HCFHSS built-up box-section stub columns and shown to yield improved design accuracy and consistency. © 2025 Elsevier Ltd

关键词： Ultra-high performance concrete

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Toughened and self-healing carbon nanotube/epoxy resin composites modified with polycaprolactone filler for coatings, adhesives and FRP

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Journal of Building Engineering 2025年 111卷

作者： Guijun Xian Xiao Qi Jiajun Shi Jingwei Tian HuiGang Xiao Key Lab of Structures Dynamic Behavior and Control (Harbin Institute of Technology) Ministry of Education Heilongjiang Harbin 150090 China Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology Harbin Institute of Technology Harbin 150090 China School of Civil Engineering Harbin Institute of Technology Heilongjiang Harbin 150090 China Yangtze River Delta Carbon Fiber and Composite Material Innovation Center Jiangsu Changzhou 213126 China State Key Laboratory of Molecular Engineering of Polymers Fudan University Shanghai 200433 China

Aiming at the durability problem caused by micro-crack damage in polymer under complex load and hygrothermal conditions, an epoxy resin matrix composite with self-repair function was developed. The multi-damage self-healing function of epoxy resin can be realized by carbon nanotubes (CNTs) reinforcement and polycaprolactone (PCL) toughening. Based on 0.5 wt% CNTs addition, epoxy resin systems with different PCL fillers (1/5/10/15 wt%) were successfully prepared. Through the comparison of thermal and mechanical properties, the optimum formula was obtained as the epoxy resin with CNTs and 5 wt% PCL composite (EPCP5). Furthermore, the tensile strength and elongation at break of EPCP5 increased by 25.4 % and 42.3 %, respectively, compared to the control sample. This improvement was attributed to the formation of hydrogen bonds between PCL and the epoxy resin, enhancing intermolecular forces. The difference in glass transition temperature for samples with varying PCL content was minimal (less than 3.8 %), indicating excellent thermal compatibility between the PCL/CNTs fillers and the resin matrix. Before damage, the tensile and flexural strengths of EPCP5 were 47.28 MPa and 116.35 MPa, respectively. Compared with one cycle for 40 % prefabricated damage, the tensile and flexural strengths of EPCP5 increased by 15.8 % and 25.1 %, 17.4 % and 25.3 % after second and three repair cycles, demonstrating the significant self-healing effect. Under 40 % and 60 % prefabrication loads, the self-healing efficiency of EPCP5 for tensile and flexural strengths reached up to 116.1 % after the third repair cycle. This was because the PCL melt filled and bridged the damaged area, effectively healing and reinforcing the micro-cracks. Noticed, after damage repairing, the micro-morphology showed that the 2–4 μm through cracks in the resin matrix were well healed. Furthermore, the infrared spectrum of EPCP5 showed a combination of the individual spectra of CNTs, PCL, and the resin, which indic

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Influence of initial oxidation and secondary oxidation on spontaneous combustion of lignite

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International Journal of Microstructure and Materials Properties 2019年第1期14卷 60-77页

作者： Huang, Zhi-An Zhang, Ling-Hua Wang, Jing-Jing Yang, Rui Zhang, Ying-Hua Wang, Hui Chen, Yu-Yan Gao, Yu-Kun State Key Laboratory of High-Efficient Mining Safety of Metal Mines University of Science and Technology Beijing Ministry of Education Beijing100083 China Work Safety Key Lab on Prevention and Control of Gas and Roof Disasters for Southern Coal Mines Hunan University of Science and Technology Xiangtan411201 China State Key Laboratory Cultivation Base for Gas Geology and Gas Control Henan Polytechnic University Jiaozuo454000 China Beijing Research Center of Urban System Engineering Beijing Key Laboratory of Operation Safety of Gas Heating and Underground Pipelines Beijing100035 China

In order to prevent the re-ignition of residual coal, this study presents a study of initial oxidation and secondary oxidation on the spontaneous combustion characteristics of coal. Three physical experiment methods:pore volume analysis, Fourier transform infrared spectroscopy and cross point temperature method, were used to study the spontaneous combustion of lignite. The results show that the pore volume of coal increases with the increase of oxidation temperature. With the increase of temperature, different functional groups in the coal sample show different trends. Compared with initial oxidation, the tendency of the functional group changes again during the secondary oxidation. In the case of constant initial temperature of secondary oxidation, the crossing point temperature of coal samples show a decreasing trend at first and rising later. And in the case of constant initial temperature of initial oxidation, the crossing point temperature of coal samples show a trend of rising. © 2019 Inderscience Enterprises Ltd.

关键词： Spontaneous combustion

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Corrigendum (Authorship Correction) to “Study on the development and dust suppression performance of a novel composite dust suppressant for metal mines” [Atmos. Pollut. Res., Available online (2024) 102336]

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Atmospheric Pollution Research 2025年第2期16卷

作者： Jiaze Ren Zhian Huang keying Meng Gang Li Abdullahi Yakubu Abdullahi Mengyang Zeng Wei Li Jinyang Li Rongxia Yu Pengfei Wang Asim Farooq State Key Laboratory of High-Efficient Mining and Safety of Metal Mines University of Science and Technology Beijing Ministry of Education Beijing 100083 China Sinosteel Maanshan General Institute of Mining Research CO. LTD. Maanshan 243000 China Guangdong Guangye Yunliu Mining Industry Co. Ltd Yunfu 527300 China Work Safety Key Lab on Prevention and Control of Gas and Roof Disasters for Southern Coal Mines Hunan University of Science & Technology Xiangtan 411201 China Department of Transportation Engineering Pak-Austria Fachhochschule: Institute of Applied Sciences and Technology Haripur 22620 Pakistan

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Damage Detection of Transmission Tower Based on Stochastic Subspace and Statistic Model

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IOP Conference Series: Earth and Environmental Science 2021年第1期687卷

作者： Wang Xingjie Yang Tingting Cao Meigen Zheng Chong Zhou Wensong Pang Yutong Wenzhou Power Supply Company of State Grid Wenzhou 330300 Zhejiang Province China Key Lab of Structures Dynamic Behavior and Control of the Ministry of Education Harbin Institute of Technology Harbin 150090 Heilongjiang Province China Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters Ministry of Industry and Information Technology Harbin Institute of Technology Harbin 150090 Heilongjiang Province China School of Civil Engineering North China University of Technology Beijing 100144 China

During the long service period of the transmission tower, the severe environment, material aging and fatigue effects result in the damage accumulation and resistance fading of the transmission tower, which even lead to the structural failure. In this paper, a stochastic subspace-based damage detection algorithm combined with statistical model is proposed for the damage identification of transmission tower structures through processing and analysing its vibration signals. Based on the structural modal parameters identified from the structural vibration response, the nominal modal parameters are defined. Considering that the Hankel matrixes constructed by the system observability matrix and the system output covariance matrix have the same kernel space, the damage index sensitive to the modal parameters is constructed. In the manuscript, firstly, the damage index establishment method and process of the algorithm are presented; and then the vibration data of transmission tower structure simulation under different damage conditions are obtained through numerical simulations; finally, above data are analysed to obtain the damage identification results of transmission tower. The results show that the method proposed in this work can effectively identify the local damage of transmission tower structure.

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Numerical simulation of a cinema fire based on FDS

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International Journal of Simulation and Process Modelling 2018年第3期13卷 200-209页

作者： Huang, Zhian Meng, Yaru Yang, Rui Gao, Yukun Yinghua, Zhang Wang, Shuyi State Key Laboratory of High-Efficient Mining and Safety of Metal Mines University of Science and Technology Beijing Ministry of Education Beijing10083 China Work Safety Key Lab on Prevention and Control of Gas and Roof Disasters for Southern Coal Mines Hunan University of Science and Technology Xiangtan411201 China State Key Laboratory of Fire Science University of Science and Technology of China Hefei230041 China

In this paper, large-scale fire dynamics simulator (FDS) model software was used to simulate a cinema fire. The reliability of the simulation results was verified by comparison with relevant research results and some fire precaution measures were put forward. Based on the physical fire model of 1:1, full-scale simulation of a cinema fire was carried out. By studying the flue gas, temperature and variation law of the CO concentration during the fire, it is found that the mechanical air-intake damages the stratification of smoke and air in the burning room to a certain extent. The lower air in the theatre is mixed with the upper high-temperature flue gas so that the temperature of lower air is higher than that of upper air. Meanwhile, the mechanical air-intake enhances the reducing speed of visibility. The results of this research provide a reference for the fire protection design of cinemas. © 2018 Inderscience Enterprises Ltd.

关键词： Fires

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Microscopic characteristics of the methane occurrence state in coal

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International Journal of Materials and Structural Integrity 2018年第1-3期12卷 151-178页

作者： Huang, Zhian Ma, Zhenzhen Yang, Rui Gao, Yukun Zhang, Yinghua Gong, Xuejiao State Key Laboratory of High-Efficient Mining and Safety of Metal Mines University of Science and Technology Beijing Ministry of Education Beijing100083 China Work Safety Key Lab on Prevention and Control of Gas and Roof Disasters for Southern Coal Mines Hunan University of Science and Technology Xiangtan411201 China Publicity Department People's Government of Sijiqing Town of Beijing Beijing100195 China

The regulation of methane occurrence is critical for gas control. Through liquid nitrogen adsorption, isothermal adsorption/desorption of methane and electrical experiments with undeformed and deformed coal, this paper studies the microscopic characteristics of methane occurrence. The results show: the median-pore-dominant deformed coal has less specific surface area and pore volume than the undeformed coal, which has mainly micropores and small pores;the deformed coal has greater methane absorption ability than the undeformed coal, and the negative influence of temperature on the former is more notable;the resistivity of deformed coal is three to seven times that of undeformed coal, and when adsorbing the resistivity of both coals decreases before being stable, whereas their dielectric constant rises first, then slightly declines. The results of the three experiments are in good accordance. The research is basic for coalbed gas and may provide a new thought for gas control. © 2018 Inderscience Enterprises Ltd.

关键词： Pore structure

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