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90 years of thermal analysis as a control tool in the melting of cast iron

China Foundry 2020年第2期17卷 69-84页

作者： Doru Michael Stefanescu Ramon Suarez Sung Bin Kim The Ohio State University ColumbusOH and The University of AlabamaTuscaloosaALUSA IK4-Azterlan Durango(Bizkaia)Spain veigalan estudio 2010 Durango(Bizkaia)Spain AnyCasting Software Co. LtdSeoulS.Korea

Since its first literature mention in conjunction with cast iron in 1931 by Esser and Lautenbusch,thermal analysis(TA)has journeyed a long *** it is an accepted and widely used tool for process control for all types of cast *** paper reviews the latest progress in the development of equipment and analysis methods that make TA successful in applications such as the estimation of chemical composition,graphitization potential,and the shape and number of graphite *** potential and limitations of the prediction of shrinkage defects propensity are analyzed in some *** of attempts at prediction of mechanical properties and shrinkage propensity are also *** graphs showing the data scattering are presented to convey the reader a better sense of the accuracy of various predictions.

关键词： thermal analysis cast iron graphite shrinkage prediction chemical composition

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铸铁熔炼热分析技术发展九十年

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铸造 2021年第2期70卷 231-247页

作者： STEFANESCU Doru michael SUAREZ Ramon KIM Sung bin The Ohio State University ColumbusOH and The University of AlabamaTuscaloosaAL IK4-Azterlan Durango(Bizkaia)Spain veigalan estudio 2010 Durango(Bizkaia)Spain AnyCasting Software Co. Ltd.SeoulS.Korea

自从1931年Esser和Lautenbusch第一次在铸铁文献中谈及热分析以来,铸铁的热分析技术已经走过了漫长的道路。目前,热分析已被广泛应用于各种铸铁的过程控制。文中综述了热分析在设备和分析方法方面的最新进展,正是这些技术进步使得热分... 详细信息

自从1931年Esser和Lautenbusch第一次在铸铁文献中谈及热分析以来,铸铁的热分析技术已经走过了漫长的道路。目前,热分析已被广泛应用于各种铸铁的过程控制。文中综述了热分析在设备和分析方法方面的最新进展,正是这些技术进步使得热分析得以成功应用于评估化学成分、石墨化潜能、石墨形状和数量等。详细分析了热分析技术在预测收缩缺陷倾向方面的潜力和局限性,讨论了预测力学性能和收缩倾向的实例。为了让读者更好地了解各种预测的准确性,文中给出了一些数据和图表。

关键词：热分析铸铁熔炼预测

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Biosorption of Chlorothalonil on Fique＇s Bagasse （Furcraea sp.）： Equilibrium and Kinetic Studies

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材料科学与工程（中英文版） 2010年第6期4卷 1-8页

作者： Adriana Maria Quinchfa-Figueroa Margarita Enid Ramfrez-Carmona Geovanna Tafurt-Garcfa Ingenieria Ambiental Escuela de lngenieria de Antioquia Medellin 7516 Colombia Centro de estudio y de Investigacion en Biotecnologla Universidad Pontificia Bolivariana Medellin 56006 Colombia

The bagasse generated as residue during the process of fiber extraction of the fique or sisal (Furcraea sp.) has been evaluated in raw state, washed and thermally activated for the adsorption of chlorothalonil (CLT). The study was developed at 25 ℃ the effects of contact times, biomass dose and pH were investigated. The bagasse was characterized using Scanning Electronic Microscopy (SEM) and Fourier Transform Infrared Spectroscopy (FTIR). A significant change in the signal spectroscopics was found in the thermally activated material. The experimental data obtained in this study shows that the fique’s bagasse is a material with potential to be used in adsorption of pollutants. The maximum uptake was 57.143 mg/g for the thermally activated material. This outcome constitutes a good contribution in environmental and technical terms.

关键词：甘蔗渣吸附百菌清动力学傅立叶变换红外光谱扫描电子显微镜平衡藻

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Recent leveling off of vegetation greenness and primary production reveals the increasing soil water limitations on the greening Earth

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Science Bulletin 2021年第14期66卷 1462-1471,M0004页

作者： Xiaoming Feng Bojie Fu Yuan Zhang Naiqing Pan Zhenzhong Zeng Hanqin Tian Yihe Lyu Yongzhe Chen Philippe Ciais Yingping Wang Lu Zhang Lei Cheng Fernando T.Maestre Marcos Fernández-Martínez Jordi Sardans Josep Peñuelas State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Earth Surface Processes and Resource Ecology Faculty of Geographical ScienceBeijing Normal UniversityBeijing 100875China International Center for Climate and Global Change Research School of Forestry and Wildlife SciencesAuburn UniversityAuburnAL 36832USA School of Environmental Science and Engineering Southern University of Science and TechnologyShenzhen 518055China Laboratoire des Sciences du Climat et de l’Environnement CEA CNRS UVSQGif-sur-Yvette 91191France Oceans and Atmosphere Commonwealth Scientific and Industrial Research OrganisationAspendaleVictoria 3195Australia South China Botanic Garden Chinese Academy of SciencesGuangzhou 510650China Land and Water Commonwealth Scientific and Industrial Research OrganisationBlack MountainCanberraACT 2601Australia School of Water Resources and Hydropower Engineering Wuhan UniversityWuhan 430072China Departamento de Ecología and Instituto Multidisciplinar para el estudio del Medio“Ramon Margalef” Universidad de AlicanteAlicante 03690Spain Global Ecology Unit CREAF-CEAB-UAB Spanish National Research CouncilCerdanyola del VallèsCatalonia 08193Spain

Global vegetation photosynthesis and productivity have increased substantially since the 1980s,but this trend is heterogeneous in both time and ***,we categorize the secular trend in global vegetation greenness into sustained greening,sustained browning and *** found that by 2016,increased global vegetation greenness had begun to level off,with the area of browning increasing in the last decade,reaching 39.0 million km^(2)(35.9%of the world’s vegetated area).This area is larger than the area with sustained increasing growth(27.8 million km^(2),26.4%);thus,12.0%±3.1%(0.019±0.004 NDVI a^(-1))of the previous earlier increase has been offset since 2010(2010–2016,P<0.05).Global gross primary production also leveled off,following the trend in vegetation greenness in time and *** leveling off was caused by increasing soil water limitations due to the spatial expansion of drought,whose impact dominated over the impacts of temperature and solar *** response of global gross primary production to soil water limitation was not identified by land submodels within Earth system *** results provide empirical evidence that global vegetation greenness and primary production are offset by water stress and suggest that as global warming continues,land submodels may overestimate the world’s capacity to take up carbon with global vegetation greening.

关键词： Ensemble empirical mode decomposition Global carbon cycle Global vegetation primary productivity Leveling off of Earth greening Global warming Soil water limitation

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