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Differentiated emission control strategy based on comprehensive evaluation of multi-media pollution:Case of mercury emission control

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Journal of Environmental Sciences 2023年第1期123卷 222-234页

作者： Dongwei Lv Qingru Wu Daiwei Ouyang Minneng Wen gehui zhang Shuxiao Wang Lei Duan State Key Laboratory of Environmental Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing 100084China

In order to comprehensively evaluate the environmental impact of multi-media mercury pollution under differentiated emission control strategies in China,a literature review and case studies were carried *** human exposure to methylmercury was assessed through the dietary intake of residents in areas surrounding a typical coal-fired power plant and a zinc(Zn)smelter,located either on acid soil with paddy growth in southern China,or on alkaline soil with wheat growth in northern *** with knowledge on speciated mercury in flue gas and the fate of mercury in the wastewater or solid waste of the typical emitters applying different air pollution control devices,a simplified model was developed by estimating the incremental daily intake of methylmercury from both local and global *** indicated that air pollution control for coal-fired power plants and Zn smelters can greatly reduce health risks from mercury pollution,mainly through a reduction in global methylmercury exposure,but could unfortunately induce local methylmercury exposure by transferring more mercury from flue gas to wastewater or solid waste,then contaminating surrounding soil,and thus increasing dietary intake via ***,tightening air emission control is conducive to reducing the comprehensive health risk,while the environmental equity between local and global pollution control should be fully *** in the south tends to have higher bioconcentration factors than wheat in the north,implying the great importance of strengthening local pollution control in the south,especially for Zn smelters with higher contribution to local pollution.

关键词： Mercury emission Methylmercury Heavy metal Bioconcentration factor Estimated daily intake Health risk assessment

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Protonation induced high-T_c phases in iron-based superconductors evidenced by NMR and magnetization measurements

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Science Bulletin 2018年第1期63卷 11-16页

作者： Yi Cui gehui zhang Haobo Li Hai Lin Xiyu Zhu Hai-Hu Wen Guoqing Wang Jinzhao Sun Mingwei Ma Yuan Li Dongliang Gong Tao Xie Yanhong Gu Shiliang Lie Huiqian Luo Pu Yu Weiqiang Yu Department of Physics Renmin University of China Beijing 100872 China State Key Laboratory of Low Dimensional Quantum Physics and Department of Physics Tsinghua University Beijing 100084 China Center for Superconducting Physics and Materials National Laboratory of Solid State Microstructures and Department of Physics Collaborative Innovation Center for Advanced Microstructures Nanjing University Nanjing 210093 China International Center for Quantum Materials School of Physics Peking University Beijing 100871 China Collaborative Innovation Center of Quantum Matter Beijing 100871 China Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China University of Chinese Academy of Sdences Beijing 100049 China

Chemical substitution during growth is a well-established method to manipulate electronic states of quantum materials, and leads to rich spectra of phase diagrams in cuprate and iron-based superconductors. Here we report a novel and generic strategy to achieve nonvolatile electron doping in series of(i.e.11 and 122 structures) Fe-based superconductors by ionic liquid gating induced protonation at room temperature. Accumulation of protons in bulk compounds induces superconductivity in the parent compounds, and enhances the Tclargely in some superconducting ones. Furthermore, the existence of proton in the lattice enables the first proton nuclear magnetic resonance(NMR) study to probe directly superconductivity. Using Fe S as a model system, our NMR study reveals an emergent high-Tcphase with no coherence peak which is hard to measure by NMR with other isotopes. This novel electric-fieldinduced proton evolution opens up an avenue for manipulation of competing electronic states(*** insulators), and may provide an innovative way for a broad perspective of NMR measurements with greatly enhanced detecting resolution.

关键词： Ion liquid gating Protonation NMR Iron-based superconductors

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SketchUp平台下的围合空间太阳辐射计算模型

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太阳能学报 2021年第9期42卷 152-158页

作者：李昌华张戈慧李智杰刘大龙西安建筑科技大学信息与控制工程学院西安710055 西安建筑科技大学建筑学院西安710055

该文基于SketchUp平台建立了围合空间太阳辐射计算模型。首先通过Ruby接口从SketchUp平台中导出围合建筑模型的瞬时阴影图像,同时针对围合空间建筑群相互遮挡形成阴影图像的特点,提出一种基于像素的HIS色彩空间建筑阴影检测算法,用来对... 详细信息

该文基于SketchUp平台建立了围合空间太阳辐射计算模型。首先通过Ruby接口从SketchUp平台中导出围合建筑模型的瞬时阴影图像,同时针对围合空间建筑群相互遮挡形成阴影图像的特点,提出一种基于像素的HIS色彩空间建筑阴影检测算法,用来对围合空间建筑立面遮挡部分进行区分和量化,进而结合传统短波辐射计算方法来估算围合空间中某建筑立面短波辐射强度。通过多地的实测数据验证了该模型的有效性,表明该模型适用于围合空间中建筑立面的太阳辐射计算,为建筑设计人员在设计规划城市建筑时准确估计城市围合空间中建筑立面的太阳辐射强度提供更为方便、快捷的计算方式。

关键词：短波辐射围合空间阴影检测 SketchUp HIS色彩空间

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水性双组分聚氨酯锤纹漆的研制

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上海涂料 2018年第4期56卷 47-49页

作者：宋利强张戈辉张禹河北晨阳工贸集团有限公司河北保定071000

研制了一种水性双组分聚氨酯锤纹漆,介绍了其配方和制备工艺,并探讨了丙烯酸聚氨酯树脂、锤纹助剂、铝粉、触变剂、溶剂等对漆膜性能及锤纹效果的影响。结果表明:水性双组分聚氨酯锤纹漆的各项性能优异,施工简单,漆膜锤纹均匀、立体美观... 详细信息

研制了一种水性双组分聚氨酯锤纹漆,介绍了其配方和制备工艺,并探讨了丙烯酸聚氨酯树脂、锤纹助剂、铝粉、触变剂、溶剂等对漆膜性能及锤纹效果的影响。结果表明:水性双组分聚氨酯锤纹漆的各项性能优异,施工简单,漆膜锤纹均匀、立体美观,具有保护和装饰的双重作用。

关键词：双组分聚氨酯水性锤纹漆锤纹助剂

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高效液相色谱法对坎地沙坦酯固体分散体颗粒溶出度的测定

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中国医药导报 2013年第3期10卷 127-129页

作者：朱燕妮傅璐仙徐飞瑶张戈辉范长春台州职业技术学院生化制药研发中心浙江台州318000

目的建立用于测定坎地沙坦酯固体分散体颗粒溶出度的高效液相测定方法。方法采用《中国药典》2010年版二部溶出度测定法二法,以乙腈-水-冰醋酸(57∶43∶1)为流动相,流速为1 mL/min,检测波长为254 nm,测定溶出液的浓度。结果所得溶液线... 详细信息

目的建立用于测定坎地沙坦酯固体分散体颗粒溶出度的高效液相测定方法。方法采用《中国药典》2010年版二部溶出度测定法二法,以乙腈-水-冰醋酸(57∶43∶1)为流动相,流速为1 mL/min,检测波长为254 nm,测定溶出液的浓度。结果所得溶液线性范围为0.42～67.20 mg/L(A=29.436 3C+31.424 4,r=0.999 8),平均回收率99.7%(RSD=0.3%)。结论本方法准确可靠,可用于坎地沙坦酯速释、缓释颗粒及片剂的溶出度测定。

关键词：坎地沙坦酯高效液相色谱法溶出度固体分散体颗粒

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坎地沙坦酯速释及缓释固体分散体的制备研究

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中国医药导报 2013年第1期10卷 126-128,134页

作者：张戈辉范长春朱燕妮徐飞瑶傅璐仙台州职业技术学院生化制药研发中心浙江台州318000

目的制备坎地沙坦酯速释和缓释固体分散体,提高坎地沙坦酯生物利用度。方法用固体分散体技术制备坎地沙坦酯速释和缓释固体分散体,并将制备方法对体外释放度的影响进行分析。结果聚乙二醇6000、泊洛沙姆188为混合载体的速释型固体分散... 详细信息

目的制备坎地沙坦酯速释和缓释固体分散体,提高坎地沙坦酯生物利用度。方法用固体分散体技术制备坎地沙坦酯速释和缓释固体分散体,并将制备方法对体外释放度的影响进行分析。结果聚乙二醇6000、泊洛沙姆188为混合载体的速释型固体分散体与物理混合物对比,药物的溶出速率和溶出量明显提高。乙基纤维素（EC）的黏度对缓释型固体分散体有较大影响;释放调节剂PEG的使用比例影响缓释效果;药物与载体用量的比例控制在1∶4~1∶6之间缓释效果较好。结论速释和缓释固体分散体均能提高药物的溶出量,以乙基纤维素为载体的固体分散体缓释效果明显。

关键词：坎地沙坦酯固体分散体速释缓释

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Effect of NOx and RH on the secondary organic aerosol formation from toluene photooxidation

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Journal of Environmental Sciences 2022年第4期34卷 1-9页

作者： Shijie Liu Xiaodi Liu Yiqian Wang Si zhang Can Wu Wei Du gehui Wang Key Lab of Geographic Information Science of the Ministry of Education School of Geographic SciencesEast China Normal UniversityShanghai 210062China Institute of Eco-Chongming 3663 North Zhongshan RoadShanghai 200062China

The secondary organic aerosol(SOA)formation mechanism and physicochemical properties can highly be influenced by relative humidity(RH)and NOx *** this study,we performed a laboratory investigation of the SOA formation from toluene/OH photooxidation system in the presence or absence of NOx in dry and wet *** chemical composition of toluene-derived SOA was measured using Aerodyne high-resolution timeof-flight aerosol mass spectrometer(HR-ToF-AMS).It was found that the mass concentration of toluene decreased with increasing RH and NOx ***,the change of SOA chemistry composition(f_(44),O/C)with increased RH was not consistent in the condition with or without *** light absorption and mass absorption coefficient(MAC)of the toluene-derived SOA only increased with RH in the presence of *** contrast,MAC is invariant with RH in the absence of ***-ToF-AMS results showed that,in the presence of NOx,the increased nitro-aromatic compounds and N/C ratio concurrently caused the increase of SOA light absorption and O/C in wet conditions,*** relative intensity of CHON and CHOxN family to the total nitrogen-containing organic compounds(NOCs)increased with the increasing RH,and be the major components of NOCs in wet *** work revealed a synergy effect of NOx and RH on SOA formation from toluene photooxidation.

关键词： Toluene Photooxidation Relative humidity NOx Optical property

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Artificial-intelligent-powered safety and efficiency improvement for controlling and scheduling in integrated railway systems

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High-Speed Railway 2024年第3期2卷 172-179页

作者： Jun Liu gehui Liu Yu Wang Wanqiu zhang Beijing National Railway Research&Design Institute of Signal&Communication Group Co.Ltd. Beijing 100070China Engineering Research Center of Railway Industry of Intelligent and Autonomous Train Control Beijing 100070China

The multi-mode integrated railway system,anchored by the high-speed railway,caters to the diverse travel requirements both within and between cities,offering safe,comfortable,punctual,and eco-friendly transportation *** the expansion of the railway networks,enhancing the efficiency and safety of the comprehensive system has become a crucial issue in the advanced development of railway *** light of the prevailing application of artificial intelligence technologies within railway systems,this study leverages large model technology characterized by robust learning capabilities,efficient associative abilities,and linkage analysis to propose an Artificial-intelligent(AI)-powered railway control and dispatching *** system is elaborately designed with four core functions,including global optimum unattended dispatching,synergetic transportation in multiple modes,high-speed automatic control,and precise maintenance decision and *** deployment pathway and essential tasks of the system are further delineated,alongside the challenges and obstacles *** AI-powered system promises a significant enhancement in the operational efficiency and safety of the composite railway system,ensuring a more effective alignment between transportation services and passenger demands.

关键词： High-speed railway Multi-mode railway system Artificial intelligence Large-scale mode,system framework Safety and efficiency improvement

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Interannual evolution of the chemical composition,sources and processes of PM_(2.5)in Chengdu,China:Insights from observations in four winters

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Journal of Environmental Sciences 2024年第4期138卷 32-45页

作者： Junke zhang Jiaqi Li Yunfei Su Chunying Chen Luyao Chen Xiaojuan Huang Fangzheng Wang Yawen Huang gehui Wang Faculty of Geosciences and Environmental Engineering Southwest Jiaotong UniversityChengdu 611756China Department of Environmental Science&Engineering Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention(LAP3)Fudan UniversityShanghai 200438China Key Lab of Geographic Information Science of the Ministry of Education School of Geographic SciencesEast China Normal UniversityShanghai 200241China

The air quality in China has improved significantly in the last decade and,correspondingly,the characteristics of PM_(2.5)have also *** studied the interannual variation of PM_(2.5)in Chengdu,one of the most heavily polluted megacities in southwest China,during the most polluted season(winter).Our results show that the mass concentrations of PM_(2.5)decreased significantly year-by-year,from 195.8±91.0μg/m~3in winter 2016 to 96.1±39.3μg/m^(3)in winter *** mass concentrations of organic matter(OM),SO_()4^(2-),NH_(4)^(+)and NO_(3)^(-)decreased by 49.6%,57.1%,49.7% and 28.7%,*** differential reduction in the concentrations of chemical components increased the contributions from secondary organic carbon and NO_(3)^(-)and there was a larger contribution from mobile *** contribution of OM and NO_(3)^(-)not only increased with increasing levels of pollution,but also increased year-by-year at the same level of *** sources of PM_(2.5)were identified:combustion sources,vehicular emissions,dust and secondary *** aerosols made the highest contribution and increased year-by-year,from 40.6%in winter 2016 to 46.3% in winter *** contrast,the contribution from combustion sources decreased from 14.4% to 8.7%.Our results show the effectiveness of earlier pollution reduction policies and emphasizes that priority should be given to key pollutants(e.g.,OM and NO_(3)^(-))and sources(secondary aerosols and vehicular emissions)in future policies for the reduction of pollution in Chengdu during the winter months.

关键词： PM_(2.5) Chemical composition Sources Interannual evolution Winter Chengdu

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Seasonal variation and size distribution of biogenic secondary organic aerosols at urban and continental background sites of China

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Journal of Environmental Sciences 2018年第9期30卷 32-44页

作者： Yanqin Ren gehui Wang Jianjun Li Can Wu Cong Cao Jiayuan Wang Lu zhang Fan Meng Hong Li State Key Laboratory of Loess and Quaternary Geology Institute of Earth Environment Chinese Academy of Sciences Xi'an 710061 China. Key Laboratory of Geographic Information Science of the Ministry of Education School of Geographic Sciences East China Normal UniversityShanghai 200041 China Center of Excellence in Regional Atmospheric Environment Institute of Urban Environment Chinese Academy of Sciences Xiamen 361021 China University of Chinese Academy of Sciences Beijin9 100049 China State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental Sciences Beijing 100012 China

Size-resolved biogenic secondary organic aerosols （BSOA） derived from isoprene and monoterpene photooxidation in Qinghai Lake, Tibetan Plateau （a continental background site） and five cities of China were measured using gas chromatography/mass spectrometry （GC/MS）. Concentrations of the determined BSOA are higher in the cities than in the background and are also higher in summer than in winter. Moreover, strong positive correlations （R^2 = 0.44-0.90） between BSOA and sulfate were found at the six sites, suggesting that anthropogenic pollution （i.e., sulfate） could enhance SOA formation, because sulfate provides a surface favorable for acid-catalyzed formation of BSOA. Size distribution measurements showed that most of the determined SOA tracers are enriched in the fine mode （〈3.3 μm） except for cis-pinic and cis-pinonic acids, both presented a comparable mass in the fine and coarse （〉3.3 μm） modes, respectively. Mass ratio of oxidation products derived from isoprene to those from monoterpene in the five urban regions during summer are much less than those in Qinghai Lake region. In addition, in the five urban regions relative abundances of monoterpene oxidation products to SOA are much higher than those of isoprene. Such phenomena suggest that BSOA derived from monoterpenes are more abundant than those from isoprene in Chinese urban areas.

关键词： Biogenic secondary organic aerosols Photochemical oxidation Seasonal and spatial variations Size distribution Sulfate

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