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Corrosion Investigation by Scanning Electrochemical Microscopy of AISI 446 and Ti-Coated AISI 446 Ferritic Stainless Steel as Potential Material for Bipolar Plate in PEMWE

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Acta Metallurgica Sinica(English letters) 2024年第4期37卷 607-619页

作者： Andrea Kellenberger Nicolae Vaszilcsin Mircea laurentiu Dan Ion Mitelea Alexandru Adrian Geana Sigrid lædre Corneliu M.Craciunescu Faculty of Industrial Chemistry and Environmental Engineering Politehnica University TimisoaraPiata Victoriei 2300006TimisoaraRomania Faculty of Mechanical Engineering Politehnica University TimisoaraPiata Victoriei 2300006TimisoaraRomania SINTEF Industry 7465TrondheimNorway

The components of proton exchange membrane water electrolysers frequently experience corrosion issues, especially at high anodic polarization, that restrict the use of more affordable alternatives to titanium. Here, we investigate localized corrosion processes of bare and Ti-coated AISI 446 ferritic stainless steel under anodic polarization by scanning electrochemical microscopy (SECM) in sodium sulphate and potassium chloride solutions. SECM approach curves and area scans measured at open-circuit potential (OCP) of the samples in the feedback mode using a redox mediator evidence a negative feedback effect caused by the surface passive film. For the anodic polarization of the sample, the substrate generation-tip collection mode enables to observe local generation of iron (II) ions, as well as formation of molecular oxygen. For the uncoated AISI 446 sample, localized corrosion is detected in sodium sulphate solution simultaneously with oxygen formation at anodic potentials of 1.0 V vs. Ag/AgCl, whereas significant pitting corrosion is observed even at 0.2 V vs. Ag/AgCl in potassium chloride solution. The Ti-coated AISI 446 sample reveals enhanced corrosion resistance in both test solutions, without any evidence of iron (II) ions generation at anodic potentials of 1.2 V vs. Ag/AgCl, where only oxygen formation is observed.

关键词： Ferritic stainless steel Corrosion Ti coating Scanning electrochemical microscopy(SECM) Magnetron sputtering Proton exchange membrane water electrolysis(PEMWE)

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Endophytic Occupation in Nodules of Rhynchosia Plants from Semiarid Regions of Argentina

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Phyton-International Journal of Experimental Botany 2024年第6期93卷 1081-1099页

作者： Cinthia T.lucero María de los Á.Ruíz Fabiola Pagliero Carolina Castaño Mariela l.Ambrosino Graciela S.lorda Facultad de Ciencias Exactas y Naturales Universidad Nacional de La PampaRuta Nacional 35km 330Santa RosaLa PampaCP6300Argentina INTa.eea.a.guil“Ing.Agr.Guillermo Covas”Ruta Nacional 5 km 580AnguilLa PampaCC116326Argentina

Beneﬁcial microbes can improve soil health by promoting soil structure,nutrient cycling,and disease *** addition,a wide array of rhizospheric microbes are responsible for producing metabolically active compounds including various types of plant growth ***,microbial biodiversity studies could contribute to the improvement of agricultural practices in deprived areas,such as the Pampean semiarid *** vast majority of studies conducted on endophytic microorganisms have focused on intensive crop legume *** contrast,little attention has been paid to microorganisms of native legumes,whose ecology is not directly affected by human *** this study,endophytic microorganisms isolated from root nodules of a selected native legume of the genus Rhynchosia were *** isolates were studied with a focus on their plant growth-pro-moting rhizobacteria(PGPR)*** the edaphic characteristics of the Pampean semiarid region,the isolates obtained were evaluated for their ability to grow under three salt stress conditions(50,100,and 200 mM NaCl)and four different pH values(6,7,8,and 9).Based on their PGPR activities,the selected strains were phylogenetically grouped using *** results showed great variability among the isolates in terms of the characteristics *** legumes manifested a wide endophytic variability and remarkable perfor-mance in PGPR *** conclude that they could be used as potential bioinoculants for legume cultivation,an excellent alternative to the use of chemical fertilizers that currently pollute the environment.

关键词： Native strains endophytes PGPR native legumes stress

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Relationship between MODIS-NDVI data and wheat yield: A case study in Northern Buenos Aires province, Argentina

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Information Processing in Agriculture 2015年第2期2卷 73-84页

作者： Mariano F.lopresti Carlos M.Di bella Américo J.Degioanni Instituto Nacional de Tecnología Agropecuaria(INTA) EEA PergaminoRuta 32 km 4.5Pergamino 2700Buenos AiresArgentina INTA-Castelar CNIAInstituto de Clima y AguaLas Cabanas y Los Reseros S/NHurlingham 1686Buenos AiresArgentina UNRC Facultad de Agronomía y VeterinariaDepartamento de Ecología AgrariaRuta Nacional 36 km 601Río Cuarto 5800Co´rdobaArgentina CONICET–Consejo Nacional de Investigaciones Científicas y Técnicas Argentina

In countries like Argentina,whose economy depends heavily on crop production,the estimation of harvests is an elementary *** providing objectivity,the use of remote sensing allows estimating yield in *** the time of maximum leaf area in wheat corresponds with the critical period of the crop,a good relationship is expected between the Normalized Difference Vegetation Index(NDVI)and *** present study was carried out in the North of Buenos Aires province,*** on the type of soil,the study area can be divided into two homogeneous subzones:a subzone with lower clay content in the southwestand a subzone with higher clay content in the *** growing seasons(2003–2011)were *** the first five years,an empirical model was calibrated and validated with field-observed wheat yields and MOD13q1 product-NDVI data,whereas in the other four years,the calibrated model was applied by means of yield maps and by comparing with official *** MOD13q1 image corresponding to Julian day 289 showed the best fit between NDVI and yield to estimate wheat yield *** yield maps,better weather conditions showedhigher yields and higher soil productivity presented a greater proportion of the area occupied by higher *** department level,an R2 value of 0.75 was found after relating the estimation of the calibrated empirical model with official *** method used allows predicting wheat yield 30 days before *** yield maps,the NDVI perceived the temporal and spatial variability in the study area.

关键词： Remote sensing Wheat NDVI Yield Empirical models MODIS

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Operational Solution to the Nonlinear Klein-Gordon Equation

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Communications in Theoretical Physics 2018年第5期69卷 506-512页

作者： G.Bengochea l.Verde-Star M.Ortigueira Departamento de Matematicas Universidad Autonoma MetropolitanaIztapalapaApartado 55-534Ciudad de MexicoMexico CTS-UNINOVA/Department of Electrical Engineering Faculdade de Ciencias e Tecnologia da Universidade Nova de LisboaCampus da FCT da UNLQuinta da Torre 2825-149 Monte da CaparicaPortugal

We obtain solutions of the nonlinear Klein-Gordon equation using a novel operational method combined with the Adomian polynomial expansion of nonlinear functions. Our operational method does not use any integral transforms nor integration processes. We illustrate the application of our method by solving several examples and present numerical results that show the accuracy of the truncated series approximations to the solutions.

关键词： operational calculus partial differential equations nonlinear Klein-Gordon equation

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Use and application of CFC-11,CFC-12,CFC-113 and SF6 as environmental tracers of groundwater residence time:A review

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Geoscience Frontiers 2019年第5期10卷 1643-1652页

作者： l.A. Chambers D.C. Gooddy A.M. Binley Department of Civil and Environmental Engineering University of StrathclydeGlasgowG1 1XJUK lancaster Environment Centre Lancaster UniversityLancasterLA1 4YQUK British Geological Survey Maclean BuildingWallingfordOX10 8BBUK

Groundwater residence time is a fundamental property of groundwater to understand important hydrogeological issues,such as deriving sustainable abstraction volumes,or,the evolution of groundwater *** anthropogenic trace gases chlorofluorocarbons (CFC-11,CFC-12 and CFC-113) and sulphur hexafluoride (SF6) are ideal in this regard because they have been released globally at known rates and become dissolved in groundwater following Henry’s law,integrating over large spatial (global) and temporal (decades) *** CFCs and SF6 are able to date groundwater up to w100 years old with the caveat of certain simplifying ***,the inversion of environmental tracer concentrations (CFCs and SF6) to derive groundwater age rests on the accurate determination of groundwater recharge parameters,namely temperature,elevation,salinity and excess air,in addition to resolving the potential for contamination,degradation and unsaturated zone *** review explores the fundamentals of CFC-11,CFC-12,CFC-113 and SF6 as environmental tracers of groundwater age and recommends complementary techniques *** this relatively simple and inexpensive technique has been used to determine initial concentrations at the recharge zone,setting the groundwater dating ‘clock’ to zero,this review then explores the meaning of groundwater ‘age’ in relation to measured environmental tracer *** is shown that the CFCs and SF6 may be applied to a wide-range of hydrogeological problems and suggests that environmental tracers are particularly powerful tools when integrated with numerical flow and transport models.

关键词： Hydrogeology Environmental tracers Groundwater dating

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Retention and redistribution of biological legacies generate resource sinks in silvopastoral systems of Arid Chaco forests

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Ecological Processes 2019年第1期8卷 344-359页

作者： laura Cavallero Marcela ledesma Dardo R.lópez Carlos A.Carranza Centro Científico Tecnológico(CCT)CONICET Córdoba CórdobaArgentina Estación Forestal INTA-Villa Dolores(eea Manfredi) CórdobaArgentina

Background:Forests are used for multiple purposes worldwide,which often include timber harvest,firewood extraction and livestock *** excessive pressure on multipurpose systems may decrease soil cover,promoting soil erosion and causing the loss of other resources,as litter and *** forestry practices can help to decrease or mitigate resource loss in the managed ***,retaining and redistributing biological legacies(***,branches,woody debris)at strategic locations can create sediment,litter,and seed-sinks in the silvopastoral *** addition,grazing management could increase or,even,decrease the success of this *** this study,we assessed the effect of branch barriers and grazing management on resource run-off/runon processes in silvopastoral systems of Arid Chaco(Córdoba,Argentina).To do this,a 2-ha area was divided in two paddocks that were randomly assigned to different grazing managements:winter *** *** randomly selected 22 water run-off paths in each paddock,and in the half of them,we build elongated branch *** each run-off path(with and without branch barriers),we recorded the amount of accumulated and lost sediment(during the rainy season),litter biomass,germinable seed bank,richness and cover of plant species,and richness and density of seedlings and saplings of woody ***:Branch barriers promoted sediment accumulation during the first and the second year of the study,depending on grazing *** temporal and spatial scale of the effect of the branch barriers also depended on grazing *** barriers also trapped litter and seeds,which may have increased the richness and density of seedlings and saplings of woody ***:By intercepting the dominant flow of erosive agents,branch barriers trapped sediment,litter,and propagules of different species.A greater amount of sediment and litter would have improved microsite quality,favouring seed germination an

关键词： Branch barriers Ecosystem degradation Multipurpose forests Soil erosion Winter grazing

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Augmented reality system to assist inexperienced pool players

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Computational Visual Media 2016年第2期2卷 183-193页

作者： l.Sousa R.Alves J.M.F.Rodrigues lARSy S and Institute of Engineering University of the Algarve lARSy S CIAC and Institute of Engineering University of the Algarve

Pool and billiards are amongst a family of games played on a table with six pockets along the rails. This paper presents an augmented reality tool designed to assist unskilled or amateur players of such games. The system is based on a projector and a Kinect 2 sensor placed above the table, acquiring and processing the game on-the-fly. By using depth information and detecting the table's rails(borders),the balls' positions, the cue direction, and the strike of the ball, computations predict the resulting balls' trajectories after the shot is played. These results—trajectories, visual effects, and menus—are visually output by the projector, making them visible on the snooker table. The system achieves a shot prediction accuracy of 98% when no bouncing occurs.

关键词： computer vision augmented reality(AR) Kinect pool game

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Development and validation of a morphological model for multiple sediment classes

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International Journal of Sediment Research 2017年第4期32卷 585-596页

作者： Guilherme Franz Paulo leit?o lígia Pinto Eduardo Jauch luís Fernandes Ramiro Neves Maretec Instituto Superior TécnicoUniversidade de Lisboa Hidromod Rua Rui Teles Palhinha Action Modulers Estrada Principal

The complexity of sediment dynamics in aquatic systems can be better understood by applying numerical models. The development of a comprehensive morphological model is presented in this *** model aims to predict the sediment transport and bed evolution in natural systems composed of different sediment types. The morphological model was implemented in MOHID, a modelling system that solves the three-dimensional hydrodynamics and advection-diffusion transport of suspended sediments. Multiple sediment classes were taken into account(non-cohesive and cohesive) considering the effects of sediment mixtures and bed consolidation on resistance to erosion. To represent bottom stratigraphy, the bottom column can be divided into several layers. The key points of the simulated processes are discussed in this paper. Model results are assessed in six test cases through comparison with analytic solutions or experimental data. The outcomes demonstrate the model's capacity to simulate the transport dynamics of non-cohesive and cohesive sediments. The speed up of morphological changes by an acceleration factor permitted modelling bed evolution for long time ***, a test case for the Tagus Estuary demonstrated the model's capacity for generating realistic sediment distribution based on the local hydrodynamic conditions. limitations in the availability of bed composition data can be overcome by considering a warm-up run to provide realistic initial conditions for further predictions of morphological developments.

关键词： Sediment transport Sand-mud mixtures Morphodynamics large-scale models MOHID modelling system

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eea/DCP材料的形状记忆特性研究

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北京航空航天大学学报 2001年第1期27卷 9-11页

作者：吕智季守振李冰泉徐修成北京航空航天大学材料科学与工程系

对以过氧化二异丙苯 (DCP)为交联剂的乙烯丙烯酸乙酯共聚物(eea)体系进行了研究 ,结果发现DCP的用量对形状回复率、形状固定率、回复响应温度、拉伸强度和断裂延伸率有很大的影响 ,并由此确定了当DCP用量为 0 .5%时 ,eea体系具有优良... 详细信息

对以过氧化二异丙苯 (DCP)为交联剂的乙烯丙烯酸乙酯共聚物(eea)体系进行了研究 ,结果发现DCP的用量对形状回复率、形状固定率、回复响应温度、拉伸强度和断裂延伸率有很大的影响 ,并由此确定了当DCP用量为 0 .5%时 ,eea体系具有优良的形状记忆性能 ;此外对材料动态性能的测试 ,指出了随着DCP用量的增加 ,室温模量逐步降低 ,而高温模量逐步提高 ,该实验同时还揭示了形状记忆高分子的高弹平台特性 .

关键词：热致形状记忆高分子 eea/DCP SMP 乙烯-丙烯酸乙酯共聚物

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人性·超越·道德——兼论德育的可能与目的

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南京师大学报（社会科学版） 2009年第6期 74-79页

作者：吕丽艳南京师范大学道德教育研究所

人性问题是一个千古问题。它是对人的一个基本定性,故而是一切有关"人之学"的前提和基础。道德以及道德教育就是针对人的品性的,因此更需要讨论人性前提。人性的基本论断大体有善和恶两种。这两种之间人性恶更为道德教育提供了可能与必... 详细信息

人性问题是一个千古问题。它是对人的一个基本定性,故而是一切有关"人之学"的前提和基础。道德以及道德教育就是针对人的品性的,因此更需要讨论人性前提。人性的基本论断大体有善和恶两种。这两种之间人性恶更为道德教育提供了可能与必要,同时也为人的生活设定了向道德超越的规定。人是一种超越性的存在,已经成为了学界的共识。但是超越的目标和超越的生活论意义仍然需要回归于道德。因此,即便在生活论意义上,仍旧是超越为手段,道德为目的。

关键词：人性超越道德生活

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