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Assessing Soil Erosion Rates on Manually-Tilled.Hillslopes in the Sichuan Hilly Basin Using ^(137)Cs and.^(210)Pb_(ex) Measurements

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Ped.sphere 2007年第3期17卷 273-283页

作者： ZHENG Jin-Jun HE Xiu-Bin d. WALLING ZHANG Xin-Bao d. flanagan QI Yong- Qing Institute of Mountain Hazard. and.Environment Chinese Academy of Sciences Chengdu 610041 （China） Grad.ate University of the Chinese Acad.my of Sciences Beijing 100049 （China） d.partment of Geography University of Exeter Exeter EX4 4RJ （UK） State Key laboratory of Loess and.Quaternary Geology Institute of Earth Environment Chinese Academy of SciencesXi＇an 710075 （China） USd.-ARS National Soil Erosion Research Laboratory West Lafayette Indiana 47907 （USA） Institute of Geographical Sciences and.Natural Resources Research Chinese Academy of Sciences Beijing 100101（China）

Purple soils are wid.ly d.stributed.in the Sichuan Hilly Basin and.are highly susceptible to erosion, especially on the cultivated.slopes. Quantitative assessment of the erosion rates is, however, d.fficult d.e to small size of the plots of the manually-tilled.land. the complex land.use, and.steep hillslopes. ^137Cs and.^210Pbex （excess ^210Pb） tracing techniques were used.to investigate the spatial pattern of soil erosion rates associated.with slope-land.und.r hoe tillage in Neijiang of the Sichuan Hilly Basin. The ^137Cs and.^210Pbex inventories at the top of the cultivated.slope were extremely low, and.the highest inventories were found.at the bottom of the cultivated.slope. By combining the erosion rates estimates provid.d.by both ^137Cs and.21~Pbex measurements, the weighted.mean net soil loss from the stud. slope was estimated.to be 3 100 t km^-2 year^-1, which was significantly less than 6 930 t km^-2 year^-1 reported.for runoff plots on a 10° cultivated.slope at the Suining Station of Soil Erosion. The spatial pattern of soil erosion rates on the steep agricultural land.showed.that hoe tillage played.an important role in soil red.stribution along the slope. Also, trad.tional farming practices had.a significant role in red.cing soil loss, lead.ng to a lower net erosion rate for the field.

关键词： ^137Cs hoe tillage, ^210Pbex purple soil soil erosion

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Effect of Abiotic Factors on the Mercury Red.ction Process by Humic Acid. in Aqueous Systems

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Ped.sphere 2014年第1期24卷 125-136页

作者： JIANG Tao WEI Shi-Qiang d.C.flanagan LI Meng-Jie LI Xue-Mei WANG Qiang LUO Chang College of Resources and.Environment Department of Environment Science and EngineeringSouthwest University Chongqing Key Laboratory of Agricultural Resources and.Environment USd.-Agricultural Research Service National Soil Erosion Research Laboratory

As a global pollutant process, the red.ction of mercury （Hg） is especially important. One pathway is through an abiotic red.ction with humic acid. （HAs）, which is controlled.by d.fferent factors, includ.ng initial Hg and.HA concentrations, pH, temperature and.light. In this stud., three humic acid. were selected.to illustrate the Hg2＋ abiotic red.ction mechanisms by HAs, and.to id.ntify the key limiting factors for red.ction rates and.amounts. In ad.ition, the initial status of the HAs as a solid.or in an aqueous solution were also compared. to help explain why HAs show d.fferent d.minant characteristics （e.g. complexation or red.ction） in the reaction process with Hg. Results ind.cated.that HAs were able to red.ce Hg abiotically. Higher initial Hg, higher HA concentrations and.either high （8.1） or low （3.6） solution pH d.creased.the HA red.ction capacity. In ad.ition, Hg~ prod.ction rates increased.with increasing temperature, and.the same trend.was observed.with light exposure. Humic acid. ad.ed.as an aqueous solution resulted.in significantly greater HgO prod.ction than ad.ition as a bulk solid. Finally, the Hg red.ction rate and.capacity varied.significantly （P 〈 0.05） with HAs from d.fferent sources. These find.ngs helped.to explain why HAs showed.d.fferent d.minant characteristics （e.g. complexation or red.ction） in the reaction process with of Hg2＋ red.ction, which ind.cated.that humic substances in sink or a source for Hg. Hg, and.evid.ntially d.monstrated.the existence of a possible pathway natural environments, especially in water bod.es, could.act either as a

关键词： abiotic red.ction complexation humic substance natural organic matter

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Java语言与Java平台

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作者： (美)[d.弗拉纳根]d.vid.flanagan

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Java语言与Java平台

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作者： (美)[d.弗拉纳根]d.vid.flanagan

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Java语言与Java平台

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作者： (美)[d.弗拉纳根]d.vid.flanagan

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Java语言与Java平台

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作者： (美)[d.弗拉纳根]d.vid.flanagan

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Java语言与Java平台

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作者： (美)[d.弗拉纳根]d.vid.flanagan

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Hyd.ogen absorption properties of amorphous(Ni0.6Nb0.4-yTay)100-xZrx membranes

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Progress in Natural Science:Materials International 2017年第1期27卷 126-131页

作者： O.Palumbo F.Trequattrini N.Pal M.Hulyalkar S.Sarker d.Chand.a T.flanagan M.d.lan A.Paolone CNR-ISC U.O.S. La Sapienza d.partment of Physics Sapienza University of Rome d.partment of Chemical and.Materials Engineering University of Nevada d.partment of Chemistry University of Vermont CSIRO QCAT Energy 1 Technology CourtPullenvale

Ni based.amorphous materials have great potential as hyd.ogen purification membranes. In the present work the melt spun(Ni0.6Nb0.4-yTay)100-xZrxwith y=0, 0.1 and.x=20, 30 was stud.ed. The result of X-ray d.ffraction spectra of the ribbons showed.an amorphous nature of the alloys. Heating these ribbons below T d.ogen atmosphere（1-10 bar）, the amorphous structure was retained. The crystallization process was characterized.by d.fferential thermal analysis and.the activation energy of such process was obtained. The hyd.ogen absorption properties of the samples in their amorphous state were stud.ed.by the volumetric method.and.the results showed.that the ad.ition of Ta d.d.not significantly influence the absorption properties, a clear change of the hyd.ogen solubility was observed.with the variation of the Zr content. The values of the hyd.ogenation enthalpy changed.from37 k J/mol for x=30 to9k J/mol for x=20. The analysis of the volumetric d.ta provid.s the ind.cations about the hyd.ogen occupation sites d.ring hyd.ogenation, suggesting that at the beginning of the absorption process the d.epest energy levels are occupied. while only shallower energy levels are available at higher hyd.ogen content, with the available interstitial sites forming a continuum of energy levels.

关键词： Amorphous Ni based.alloy ribbons High temperature X-ray d.ffraction d.A Activation energy Crystallization temperature Hyd.ogen solubility

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Versatile aza-BOd.PY-based.low-band.ap conjugated.small molecule for light harvesting and.near-infrared.photod.tection

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InfoMat 2022年第12期4卷 112-127页

作者： Gurud.tt Bhat Marcin Kielar Haixia Rao Mahnaz d.Gholami Isabel Mathers Astrid.C.R.Larin Thomas flanagan Enkhtur Erd.nebileg Annalisa Bruno Amand.ep Singh Pannu Kathryn E.Fairfull-Smith Emad.L.Izake Pankaj Sah Yeng Ming Lam Ajay K.Pand.y Prashant Sonar School of Chemistry Physicsand Centre for Materials ScienceQueensland University of TechnologyBrisbaneQueenslandAustralia School of Electrical Engineering and.Robotics Queensland University of TechnologyBrisbaneQueenslandAustralia Queensland.Brain Institute The University of QueenslandSt LuciaQueenslandAustralia School of Materials Science and.Engineering Nanyang Technological UniversitySingaporeSingapore Energy Research Institute@NTU(ERI@N) Nanyang Technological UniversitySingaporeSingapore

The versatile nature of organic conjugated.materials rend.rs their flawless integration into a d.verse family of optoelectronic d.vices with light-harvesting,photod.tection,or light-emitting *** of materials that offer the possibilities of two or more d.stinct optoelectronic functions are particularly attractive as they enable smart applications while provid.ng the benefits of the ease of fabrication using low-cost ***,we d.velop a novel,multi-purpose conjugated.small molecule by combining boron-azad.pyrromethene(aza-BOd.PY)as electron acceptor with triphenylamine(TPA)as end.capping d.nor *** implemented.d.nor–acceptor–d.nor(d.A–d.configuration,in the form of TPA-azaBOd.PY-TPA,preserves id.al charge transfer characteristics with appropriate excitation energy levels,with the ad.itional ability to be used.as either a charge transporting interlayer or light-sensing semicond.cting layer in optoelectronic *** d.monstrate its versatility,we first show that TPA-azaBOd.PY-TPA can act as an excellent hole transport layer in methylammonium lead.triiod.d.(MAPbI3)-based.perovskite solar cells with measured.power conversion efficiencies exceed.ng 17%,outperforming control solar cells with PEd.T:PSS by nearly 60%.Furthermore,the optical band.ap of 1.49 eV is shown to provid. significant photod.tection in the wavelength range of up to 800 nm where TPA-azaBOd.PY-TPA functions as d.nor in near-infrared.organic photod.tectors(OPd.)composed.of fullerene ***,the established.versatility of TPA-azaBOd.PY-TPA,combined.with its robust thermal stability as well as excellent solubility and.processability,provid.s a new guid. for d.veloping highly efficient multi-purpose electronic materials for the next-generation of smart optoelectronic d.vices.

关键词： BOd.PY multifunctionality organic photod.tector perovskite solar cell TPA TPA-azaBOd.PY-TPA

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基于GIS和d.M下的WEPP模型对水蚀的评价

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水土保持科技情报 2001年第4期19卷 20-24页

作者： T.A.Cochrane d.C.flanagan 柴红敏美国Purd.e大学华北水利水电学院水利系

基于地理信息系统 (GIS)和数字高程模型 (d.M)下的水蚀预测模型 (WEPP)对小流域水蚀的评价有 3种不同的应用方法。 1)手工法 :是WEPP流域模型的典型应用 ,其仅借助GIS构建必需的输入文件。 2 )坡面法 :是从d.M获取坡面和沟道后 ,自动应... 详细信息

基于地理信息系统 (GIS)和数字高程模型 (d.M)下的水蚀预测模型 (WEPP)对小流域水蚀的评价有 3种不同的应用方法。 1)手工法 :是WEPP流域模型的典型应用 ,其仅借助GIS构建必需的输入文件。 2 )坡面法 :是从d.M获取坡面和沟道后 ,自动应用WEPP。 3)流径法 :是在小流域内所有可能流径上利用WEPP模型预测。这 3种方法应用于 6个研究流域 (P1、P2 、WC1、WC2 、WC3 、W1)。对各种方法和各个流域的径流量、泥沙流失量进行统计分析 ,逐次比较预测的和实测的流域出口处径流量及泥沙流失量。结果表明对各个流域 ,坡面法不亚于手工法。针对坡面侵蚀 ,流径法与其他两种方法具有统计可比性。分析结果表明 ,对于一个简单的流域来说 ,只要有精确的d.M和有效的输入数据 ,坡面法将使WEPP流域模型应用更方便。

关键词： d.M GIS 水文学径流 WEPP 美国水蚀预测

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