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Photooxidation of carbonyl sulfide in the presence of the typical oxides in atmospheric aerosol

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Science China Chemistry 2005年第1期48卷 31-37页

作者： wu hongbo WANG Xiao CHEN Jianmin Department of Environmental Science and Engineering Fudan University Shanghai 200433 China Department of Environmental Science and Engineering Fudan University Shanghai 200433 China Department of Environmental Science and Engineering Fudan University Shanghai 200433 China

Photooxidation of carbonyl sulfide (COS) under UV irradiation and the role of the oxides such as SiO2, Al2O3 and Fe2O3 were investigated by in situ FTIR in a long optical path cell. The major products were identified as SO2 and CO2 by means of IR spectra and GC-MS. SO2 was partially oxidized into SO4 on the surface of the oxides 2? and interior wall of the reactor, which was determined by XPS. The photooxidation is pseudo first order with respect to COS, and the apparent rate constant is approximately 9.30×10?4·s?1. SiO2 and Al2O3 promote the photooxida- tion of COS significantly, but Fe2O3 has no obvious influence on the reaction. The reaction rates in the presence of the oxides or not, rank as: UV + SiO2> UV + Al2O3> UV, UV + Fe2O3. The potentiality of the oxides for promoting the photooxidation of COS implicates that the aerosol particles may contribute to the photooxidation of COS in the at- mosphere.

关键词： carbonyl sulfide, photooxidation, atmospheric aerosol, oxides, in situ FTIR.

Recursive narrative alignment for movie narrating

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Science China(Information Sciences) 2020年第7期63卷 230-232页

作者： Zhongyi HAN hongbo wu Benzheng WEI Yilong YIN Shuo LI School of Software Shandong University Computational Medicine Lab Shandong University of Traditional Chinese Medicine

Movie narrating can enable the capture of not only the subject matter but also the emotive essence of the subject. For example,"having a good time"or "feeling exhausted", which relates to the narrative of "holding a birthday party". Movie narrating converts the human-like expressivity in movie shots (i.e., sets of film frames) into a cohesive and

关键词： Movie Narrating Visual Captioning Long Short-Term Memory Networks Deep Learning Narrative

Structural transformation of metal–organic framework with constructed tetravalent nickel sites for efficient water oxidation

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Journal of Energy Chemistry 2022年第11期31卷 404-411,I0011页

作者： Weijian wu Zhen Gao Qun Li Zhiya Wang Shiyin Liu hongbo wu Yuanchun Zhao Yalong Jiao Xiaojia Zhao Hebei Key Laboratory of Inorganic Nano-materials College of Chemistry and Materials ScienceHebei Normal UniversityShijiazhuang 050024HebeiChina Hebei Key Laboratory of Photophysics Research and Application College of PhysicsHebei Normal UniversityShijiazhuang 050024HebeiChina State Key Laboratory of Metastable Materials Science and Technology Yanshan UniversityQinhuangdao 066004HebeiChina

A mixture of Ni and Fe oxides is among the most commonly active catalysts for the oxygen evolution reaction(OER)during the water oxidation *** particular,Ni oxide incorporated with even a small amount of Fe leads to substantively enhanced OER ***,the critical role of Fe species during the electrocatalytic process is still under ***,we report nickel(oxy)hydroxide incorporated with Fe through the surface reconstruction of a bimetallic metal-organic framework(NiFe-MOF)during the water oxidation *** spectroscopic investigations with theoretical calculations reveal the critical role of Fe in promoting the formation of highly oxidized Ni^(4+),which directly correlates with an enhanced OER *** the geometric and electronic structu res of the as-reconstructed Ni_(1-x)Fe_(x)OOH electrocatalysts can be delicately tuned by the Ni-Fe ratio of the bimetallic NiFe-MOF,further affecting the catalytic *** a result,the Ni_(1-x)Fe_(x)OOH derived from Ni_(0.9)Fe_(0.1)-MOF delivers low overpotentials of 260 mV at 10 mA cm^(-2)and 400 mV at 300 mA cm^(-2).

关键词： Structural transformation Bimetallic metal-organic framework Oxygen evolution reaction In-situ Raman spectroscopy High-valence metal sites

Genome-wide distribution of histone H3 acetylation in all-trans retinoic acid induced neuronal differentiation of SH-SY5Y cells

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Chinese Science Bulletin 2009年第6期54卷 1043-1049页

作者： FANG hongbo MI Yang wu NingHua ZHANG Ye SHEN YuFei National Laboratory of Medical Molecular Biology Department of Biochemistry and Molecular Biology Institute of Basic Medical Sciences Chinese Academy of Medical Sciences & Peking Union Medical College Beijing 100005 China

With chromatin immunoprecipitation (ChIP) and promoter DNA microarray analyses (ChIP-on-chip), we analyzed the variations of acetylation on histone H3 in all-trans retinoic acid (RA) induced neuronal cell differentiation. Neuroblastoma SH-SY5Y cells were treated with RA for 24 h and the acetylation on histone H3 in the promoter region of the genes was detected. Results showed that, after treatment, the level of acetylation on histone H3 elevated in 597 genes in the genome, and reduced in the other 647 genes compared with those of the control. In summary, we have successfully adopted a high throughput technique to detect and analyze variations of acetylation of histone H3 in human genome at the early phage of RA induced neuronal differentiation of the SH-SY5Y cells.

关键词：全反式维甲酸神经细胞分化组蛋白H3 诱导分化乙酰化全基因神经元 DNA芯片

The first application of isoindigo-based polymers in non-fullerene organic solar cells

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Science China Chemistry 2020年第9期63卷 1262-1271页

作者： Bao Zhang Ning An hongbo wu Yanfang Geng Yanming Sun Zaifei Ma Weiwei Li Qiang Guo Erjun Zhou Henan Institutes of Advanced Technology Zhengzhou UniversityZhengzhou 450003China CAS Key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and TechnologyBeijing 100190China School of Chemistry Beihang UniversityBeijing 100191China Center for Advanced Low-dimension Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China State Key Laboratory of Organic-Inorganic Composites Beijing University of Chemical TechnologyBeijing 100029China

Although isoindigo(IID)-based polymers can realize high charge mobility,these materials are currently confined to fullerenebased organic solar cells(OSCs).Herein,we designed a pair of alternative D-π-A type copolymers,PE71 and PE72,to expand the application in non-fullerene OSCs,where benzo[1,2-b:4,5-b′]thiophene(BDT),thieno[3,2-b]thiophene(TT)and IID units were used as D,A andπ-bridge,*** aim of optimizing the length of alkyl chains on TT bridge is to ensure polymer solubility,crystallinity as well as miscibility with acceptor *** find that PE71 and PE72 exhibit similar optical and electronic properties,but PE71 with shorter hexyl chain tends to aggregate into fiber-like *** the end,Y6 is selected as the electron acceptor because of suitable energy levels and complementary absorption ***,PE71:Y6 device realizes a power conversion efficiency(PCE)of 12.03%,which is obviously higher than that of PE72:Y6 device(9.74%)and is also the highest value for IID-based photovoltaic *** charge transport,molecular aggregation,film morphology and energy loss analysis were systematically *** improved photovoltaic performance of PE71:Y6 mainly originates from the better interpenetrating network structure toward facilitating exciton seperation and free charge carrier *** results indicate that IID-based D-π-A polymers can also be utilized in non-fullerene OSCs and the alkyl chains on the thieno[3,2-b]thiopheneπ-bridge have a vital effect on the photovoltaic performance.

关键词： isoindigo thieno[3,2-b]thiophene alkyl chain non-fullerene organic solar cells

Estimate the influence of snow grain size and black carbon on albedo

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Research in Cold and Arid Regions 2015年第2期7卷 111-120页

作者： ZhongMing Guo NingLian Wang XiaoBo wu hongbo wu YuWei wu State Key Laboratory of Cryospheric Science Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences School of Environment Science Nanjing Xiaozhuang University

Estimation of the influence of snow grain size and black carbon on albedo is essential in obtaining the accurate albedo. In this paper, field measurement data, including snow grain size, snow depth and density was obtained. Black carbon samples were collected from the snow surface. A simultaneous observation using Analytical Spectral Devices was employed in the Qiyi Glacier located in the Qilian Mountain. Analytical Spectral Devices spectrum data were used to analyze spectral re- flectance of snow for different grain size and black carbon content. The measurements were compared with the results obtained from the Snow, Ice, and Aerosol Radiation model, and the simulation was found to correlate well with the ob- served data. However, the simulated albedo was near to 0.98 times of the measured albedo, so the other factors were as- sumed to be constant using the corrected Snow, Ice, and Aerosol Radiation model to estimate the influence of measured snow grain size and black carbon on albedo. Field measurements were controlled to fit the relationship between the snow grain size and black carbon in order to estimate the influence of these factors on the snow albedo.

关键词： snow grain size black carbon albedo measured data

延期状态下电子雷管电子控制模块的高过载加载实验

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高压物理学报 2025年第1期39卷 98-108页

作者：叶紫阳吴红波杨仕春黄菓树李天浩孙翼马成帅任梦雨安徽理工大学化工与爆破学院安徽淮南232001 安徽江南化工股份有限公司安徽合肥230031 无锡盛景微电子股份有限公司江苏无锡214000 安徽中金立华矿业工程有限公司安徽安庆246003

为探究电子雷管内的电子控制模块在延期状态下受冲击载荷时的失效机制,采用分离式霍普金森压杆(split Hopkinson pressure bar,SHPB)对电子雷管试件进行了高过载加载测试,得到了整体电子控制模块和分离出钽电容的其余电子控制模块受不... 详细信息

为探究电子雷管内的电子控制模块在延期状态下受冲击载荷时的失效机制,采用分离式霍普金森压杆(split Hopkinson pressure bar,SHPB)对电子雷管试件进行了高过载加载测试,得到了整体电子控制模块和分离出钽电容的其余电子控制模块受不同加载压力时的失效情况。结果显示:钽电容在1.495×10^(5)g过载时出现电压下降现象,且过载越大,短路失效情况越明显;在一定过载范围内,钽电容因其特有的自愈性,可在短时间内回到起始量级;当过载超过临界范围,达到3.848×10^(5)g时,钽电容损坏且无法逆转。模块内其余组件的抗过载能力强于电容,芯片在4.155×10^(5)g过载后检测异常,电阻元件失效发生在4.249×10^(5)g以上过载。

关键词：电子雷管电子控制模块分离式霍普金森压杆高过载失效

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Quantitative estimation of the influence factors on snow/ice albedo

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Research in Cold and Arid Regions 2020年第2期12卷 83-94页

作者： ZhongMing Guo NingLian Wang BaoShou Shen ZhuJun Gu hongbo wu YuWei wu AnAn Chen Xi Jiang Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity Xi'anShannxi 710127China Institute of Earth Surface System and Hazards College of Urban and Environmental SciencesNorthwest UniversityXi'anShannxi 710127China School of Environmental Science Nanjing Xiaozhuang UniversityNanjingJiangsu 211171China School of History and Tourism Shaanxi Sci-Tech UniversityHanzhongShannxi 723000China Key Laboratory of Meteorological Disaster of Ministry of Education Nanjing University of Information Science&TechnologyNanjingJiangsu 210000China

Quantitative estimation of the influence of various factors,such as black carbon,snow grain,dust content,and water con tent on albedo is essential in obtaining an accurate *** this paper,field measurement data,including snow grain size,density,liquid water content,and snow depth was *** carbon and dust samples were collected from the snow surface.A simultaneous observation using ASD(Analytical Spectral Devices)spectral data was employed in the Qiyi glacier located on Qilian *** measurements were compared with results obtained from the Snow,Ice,and Aerosol Radiation(SNICAR)***,a HYbrid Single-Particle Lagrangian Integrated Trajectory(HYSPLIT)air mass backward trajectory model was used to track the source of black *** simulation was found to correlate well with observed *** water content was the most influential factor of albedo among the several influencing fac tors,followed by black carbon content and snow grain ***,snow density change had the least toward *** atmospheric trajectories model can only approximately show the source of black carbon and not clearly indicate the source region of black carbon.

关键词： albedo black carbon snow grain size quantitative estimation

Review of snow grain size retrieval from remote sensing

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Research in Cold and Arid Regions 2013年第2期5卷 251-258页

作者： ZhongMing Guo hongbo wu RuiJuan Mao ChunWen Zhang YuWei wu State Key Laboratory of Cryospheric Science Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences

In this paper, the significance and history of studying snow grain size is introduced. Based on the assumption that high reflectivity in the visible band and significant decreasing reflectivity of snow surface in the infrared band, the grain size of snow, spherical and non-spherical, is sensitive to changes in remote sensing retrieval foundation. Also, models and algorithms applied in current studies are reviewed, together with their advantages and disadvantages. In addition, in order to obtain retrieval accuracy, some factors that may affect grain size are also discussed, such as temperature, wavelength, arid particle shape, as well as method authentication.

关键词： snow grain size remote sensing retrieval model algorithm