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Water-soluble brown carbon in atmospheric aerosols from the resource-dependent cities:Optical properties,chemical compositions and sources

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Journal of Environmental Sciences 2024年第4期138卷 74-87页

作者： Haoji Wang Yue Su Yangzheng liu Fei x.e x.ngjun zhou Ruihong Yu Changwei lü Jiang He School of Ecology and Environment Inner Mongolia UniversityHohhot 010021China Institute of Environmental Geology Inner Mongolia UniversityHohhot 010021China Environmental Monitoring Center of Inner Mongolia Hohhot 010011China

As a vital type of light-absorbing aerosol,brown carbon(BrC)presents inherent associations with atmospheric photochemistry and climate ***,the understanding of the chemical and optical properties of BrC is limited,especially in some resource-dependent cities with long heating periods in northwest *** study showed that the annual average abundances of Water-soluble BrC(WS-BrC)were 9.33±7.42 and 8.69±6.29μg/m^(3)in Baotou and Wuhai and the concentrations,absorption coefficient(Abs_(365)),and mass absorption efficiency(MAE365)of WS-BrC presented significant seasonal patterns,with high values in the heating season and low values in the non-heating season;while showing opposite seasonal trends for the Absorption Angstr?m ex.onent(AAE_(300-400)).Comparatively,the levels of WS-BrC in developing regions(such as cities in Asia)were higher than those in developed regions(such as cities in Europe and Australia),indicating the significant differences in energy consumption in these *** combining fluorescence ex.itation-emission matrix.EEM)spectra with the parallel factor(PARAFAC)model,humic-like(C1 and C2)and proteinlike(C3)substances were identified,and accounted for 61.40%±4.66%and 38.6%±3.78%at Baotou,and 60.33%±6.29%and 39.67%±4.17%at Wuhai,*** results of source apportionment suggested that the potential source regions of WS-BrC varied in heating ***-heating seasons and that the properties of WS-BrC significantly depended on primary emissions(e.g.,combustion emissions)and secondary formation.

关键词： Water-soluble brown carbon Atmospheric aerosols Optical properties PARAFAC Source apportionment

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Effects of laser shock processing onθ-Al_(2)O_(3)toα-Al_(2)O_(3)transformation and ox.de scale morphology evolution in(γ'+β)two-phase Ni-34Al-0.1Dy alloys

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Journal of Materials Science & Technology 2022年第14期109卷 157-166页

作者： Bangyang zhou Jian He Qijie zhou Hongbo Guo School of Materials Science and Engineering Beihang University(BUAA)Beijing 100191China Research Institute for Frontier Science Beihang University(BUAA)Beijing 100191China Key laboratory of High-Temperature Structural Materials&Coatings Technology(Ministry of Industry and Information Technology) Beihang University(BUAA)Beijing 100191China

(γ’+β)two-phase Ni-Al is a promising high-temperature protective coating material used on Ni-base superalloys since it has good interfacial compatibility with superalloys due to the low Al content compared to single-phaseβ-NiA *** this paper,we aim to improve the ox.dation resistance,whereby Ni-34Al-0.1Dy,a(γ’+β)two-phase Ni-Al alloy,was treated by laser shock processing(lSP)and the ox.dation behavior at 1150℃ was *** results showed that after ox.dation,Al_(2)O_(3)scale formed on the originalβphase of the untreated alloy with a small grain size(200-800 nm),while for the lSP-treated samples,the scale grown on the originalβphase was dominantly composed of larger Al_(2)O_(3)grains with a size of 2-3μ*** distinction was attributed to the promotion ofθ-Al_(2)O_(3)toα-Al_(2)O_(3)transformation induced by the lSP,because the dislocation density,as well as surface roughness,were increased during lSP treatment which can provide heterogeneous nucleation sites forα-Al_(2)O_(3).In addition,the larger-size Al_(2)O_(3)particles,derived from the direct conversion of needle-likeθ-Al_(2)O_(3)in the initial ox.dation stage,could rapidly overspread the wholeβphase surface thus reducing the scale growth rate.

关键词： Intermetallics laser shock processing Ox.dation θ-Al_(2)O_(3)toα-Al_(2)O_(3)transformation Morphology evolution

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Effects of DIMBOA on impulse discharges of max.llary lateral sensillum styloconicum of armyworm larvae

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Chinese Science Bulletin 1997年第1期42卷 72-76页

作者： Yang, DM luo, l Yan, FM Cheng, HW zhou, PA BEIJING UNIV COLL LIFE SCIBEIJING 100871PEOPLES R CHINA

THE DIMBOA (2, 4-dihydrox.-7-methox.-1, 4-benzox.zin-3-one), a secondary product present in corn plants, plays an important role in protecting the plant against the pest attack. DIMBOA is rich in seedlings of cereal crops, especially in maize. Many investigators demonstrated a linear relationship between the DIMBOA content in plant and the resistance of the plant to pest. Feng et al. (1992) summarized that the tox.city of DIMBOA is associated

关键词： armyworm larvae gustatory chemoreceptor lateral sensillum styloconicum DIMBOA.

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SEM in situ laboratory investigations on damage growth in GFRP composite under three-point bending tests

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Chinese Science Bulletin 2010年第12期55卷 1199-1208页

作者： zhou HongWei MISHNAEVSKY Jr l BRONDSTED p TAN JinBiao GUI lele State Key laboratory of Coal Resources and Safe Mining China University of Mining and Technology (Beijing) Beijing 100083 China Rise National laboratory for Sustainable Energy DTU AFM-228 P.O. Box 49 DK-4000 Roskilde Denmark

Glass fiber-reinforced polymer (GFRP) composites are widely used in low-weight *** (scanning electron microscopy) in situ ex.eriments of damage growth in GFRP composite under three-point bending loads are carried *** summarizing the ex.erimental results of three groups of samples with different orientation angles of fibers,the dependence of mechanical parameters on the orientation angles of fibers are *** regression analysis show that the peak strengths,the elastic strengths and the elastic modulus of the composites decease with the orientation angles of fibers almost ***,the damage growth and meso-scale structure changes in GFRP composites during three-point bending loading are analyzed.

关键词：玻璃钢复合材料三点弯曲试验实验室扫描电镜现场调查损伤纤维增强聚合物扫描电子显微镜

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Photo-responsive functional materials based on light-driven molecular motors

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light(Science & Applications) 2024年第3期13卷 407-420页

作者： Yanping Deng Guiying long Yang Zhang Wei Zhao Guofu zhou Ben l.Feringa Jiawen Chen SCNU-UG International Joint laboratory of Molecular Science and Displays National Center for International Research on Green OptoelectronicsSouth China Normal UniversityGuangzhou 510006China Stratingh Institute for Chemistry University of GroningenNijenborgh 49747AG GroningenThe Netherlands

In the past two decades,the research and development of light-triggered molecular machines have mainly focused on developing molecular devices at the nanoscale.A key scientific issue in the field is how to amplify the controlled motion of molecules at the nanoscale along multiple length scales,such as the mesoscopic or the macroscopic scale,or in a more practical perspective,how to convert molecular motion into changes of properties of a macroscopic ***-driven molecular motors are able to perform repetitive unidirectional rotation upon irradiation,which offers unique opportunities for responsive macroscopic *** several reviews that focus on the design,synthesis and operation of the motors at the nanoscale,photo-responsive macroscopic materials based on light-driven molecular motors have not been comprehensively *** the present review,we first discuss the strategy of confining absolute molecular rotation into relative rotation by grafting motors on ***,ex.mples of self-assemble motors in supramolecular polymers with high internal order are ***,we will focus on building of motors in a covalently linked system such as polymeric gels and polymeric liquid crystals to generate complex.responsive ***,a perspective toward future developments and opportunities is *** review helps us getting a more and more clear picture and understanding on how complex.movement can be programmed in light-responsive systems and how man-made adaptive materials can be invented,which can serve as an important guideline for further design of complex.and advanced responsive materials.

关键词： functions materials material

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Transverse Electric and Transverse Magnetic Active Intersubband Transitions in CaAs/AlGaAs Step Quantum Well

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Chinese Physics letters 1994年第12期11卷 762-765页

作者： CUI Dafu CHEN Zhenghao YUAN Zhenyu zhou Yueliang lÜ Huibin YANG Guozhen Institute of Physics Academia SinicaBeijing 100080

We have observed transverse electric(TE)and transverse magnetic(TM)intersubband infrared absorption peaks in GaAs/AlGaAs step multiquantum wells(SMQW).The energy splitting between TE and TM is *** high conversion efficiency of second harmonic signal due to intersubband transition in the GaAs/AlGaAs SMQW with a waveguiding surface-emitting structure have been *** second harmonic generation(SffG)obeys wave vector conservation and propagates perpendicular to the waveguide surface which shows that the nonlinear polarization field for SHG may be TE as well as TM *** ex.stence of strong surface-emitting second harmonic signal also offers solid evidence of TE polarization active intersubband transition in GaAs/AlGaAs SMQW structure.

关键词： polarization waveguide AlGaAs

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Detection of the ppb level SO2 in H2 fuel by an adsorption-desorption GC technique

Detection of the ppb level SO2 in H2 fuel by an adsorption-d...

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第九届全国氢能学术会议

作者： l.zhou,H.Wang,J.Sun,Y.Wang,GJ.liu,W.Q.li,S.Shi Shanghai University,China

The quality(purity) of H fuel has become an important issue in the fuel cell vehicle industry,because some H impurities(e.g.,SO),even at 10-100 ppb level,can greatly reduce the working life of the proton ex.hange membrane(PEM) fuel *** on the source, there is a wide range of impurities in the H fuel,which is usually made from other H

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Evaluation of trap effi ciency for the Asian longhorned beetle,Anoplophora glabripennis

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Journal of Forestry Research 2023年第4期34卷 1133-1144页

作者： Junx.n Yan Yantao zhou Dun Jiang Yaru lü Yingsheng liu Mengmeng Yu Aijun Zhang Shanchun Yan College of landscape Architecture Northeast Forestry UniversityHarbin 150040Heilongjiang ProvincePeople’s Republic of China Engineering Consulting and Design Institute Company limited Northeast Forestry UniversityHarbin 150040Heilongjiang ProvincePeople’s Republic of China College of Forestry Northeast Forestry UniversityHarbin 150040Heilongjiang ProvincePeople’s Republic of China Key laboratory of National Forestry and Grassland Administration on Forest and Grassland Pest Monitoring and Warning Center for Biological Disaster Prevention and ControlNational Forestry and Grassland AdministrationShenyang 110034Liaoning ProvincePeople’s Republic of China Forestry Bureau of Hengshui City Hengshui 053000Hebei ProvincePeople’s Republic of China College of Food Science and Nutritional Engineering China Agriculture UniversityBeijing 100083People’s Republic of China Invasive Insect Biocontrol and Behavior laboratory BARC-WestUSDA-ARSBeltsvilleMD 20705USA

The Asian longhorned beetle(AlB),Anoplophora glabripennis,is a well-known stem borer with high polyphagous properties causing frequent outbreaks in northeast *** attractant-based trap is needed to improve the sensitivity,reliability,and effi ciency for detection of the *** this study,the eff ects of attractants,trap types and color synergy of a trapping system were *** blends comprised of the male-produced,two-component pheromone plus plant volatiles were used in the fi eld in Hengshui *** volatiles(e.g.,1-pentanol,and 2-pentanol)in combination with male pheromones increased the mean number of trapped AlB compared to the pheromone *** responded better than females to traps baited with plant volatiles alone,whereas traps emitting plant volatiles plus pheromone,regardless of trap type,captured more females than *** AlB-trapping effi ciency of a modifi ed fl ight intercept panel trap was more than ten times as high as a woodborer panel trap and 1.2 times a fl ight intercept panel *** 1-pentanol and 2-pentanol attractants alone or in combination with male-produced pheromone were more eff ective for monitoring AlB than common *** laboratory Y-tube olfactometer ex.eriments,the color brown was better at increasing attraction of both males and females to 1-pentanol,2-pentanol,1-pentanol+pheromone,and 2-pentanol+pheromone compared to the clear-glass control *** fi ndings provide a reliable and eff ective trap system to monitor AlB infestations.

关键词： Asian longhorned beetle Trap design Visual cue Male-produced pheromone Plant volatiles Integrated pest management

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SPARSE RECOVERY BASED ON THE GENERAlIZED ERROR FUNCTION

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Journal of Computational Mathematics 2024年第3期42卷 679-704页

作者： Zhiyong zhou Department of Statistics and Data Science and Institute of Digital FinanceHangzhou City UniversityHangzhou 310015China

In this paper,we offer a new sparse recovery strategy based on the generalized error *** introduced penalty function involves both the shape and the scale parameters,making it ex.remely *** both constrained and unconstrained models,the theoretical analysis results in terms of the null space property,the spherical section property and the restricted invertibility factor are *** practical algorithms via both the iteratively reweighted■_(1)and the difference of convex.functions algorithms are *** ex.eriments are carried out to demonstrate the benefits of the suggested approach in a variety of *** practical application in magnetic resonance imaging(MRI)reconstruction is also investigated.

关键词： Sparse recovery Generalized error function Nonconvex.regularization Itera-tive reweighted li Difference of convex.functions algorithms

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STUDY ON CARBOx.l-CONTAINING STARCH IN HEAVY METAl REMOVAl

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Chinese Chemical letters 1995年第7期6卷 605-608页

作者： Hu, ZA zhou, x. Zhang, l Guo, YH Wu, HY NW Normal Univ Dept Chem Lanzhou 730070 Peoples R China lanzhou Teachers Sch Dept Chem Lanzhou 730070 Peoples R China

Water-insoluble carbox.l-containing starch graft polymers were prepared. Residual metal ion concentrations in solutions treated with the insoluble starch graft polymers were measured in different pH. The mechanism of ...

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