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Quasi-in vivo corrosion behavior of AZ31B Mg alloy with hybrid MWCNTs-PEO/PCL based coatings

Journal of Magnesium and Alloys 2022年第11期10卷 3217-3233页

作者： Morteza Daavari Masoud Atapour Marta Mohedano Hugo Mora Sánchez Juan Rodríguez-Hernández Endzhe Matykina raul Arrabal Aboozar Taherizadeh Department of Materials Engineering Isfahan University of Technology84156-83111 IsfahanIran Departamento de Ingeniería Química y de Materiales Facultad de Ciencias QuímicasUniversidad Complutense28040 MadridSpain Institute of Polymer Science and Technology(CSIC) Polymer Functionalization GroupMadrid 28006Spain

This study investigated the effects of multi-walled carbon nanotubes(MWCNTs) and polycaprolactone(PCL) on the quasi-in vivo corrosion behavior of AZ31B Mg alloy treated by plasma electrolytic oxidation(PEO). Thin(~2 μm, PCTPCL4) and thick(~60 μm, PCTPCL6) PCL layers were applied only onto the MWCNTs-PEO coating(PCT) as it showed better corrosion performance. Findings reveal that incorporation of MWCNTs induced several structural and functional modifications in the PEO coating, such as increased roughness, a thicker inner barrier layer, and reduced ***-in vivo corrosion testing was carried out under controlled temperature, p H, and fluid flow in simulated body fluid(SBF) by electrochemical impedance spectroscopy(EIS) and hydrogen evolution experiments. EIS results revealed that, after 48 h immersion, a diffusion process controlled hydration of the ceramic coatings. Comparison of the collected hydrogen after 15 days of immersion in the quasi-in vivo environment revealed that the PEO and PCT ceramic coatings decreased hydrogen generation by up to 74% and 91%, respectively, compared to non-coated ***6 coating exhibited the lowest amount of collected hydrogen(0.2 m L/cm^(2)). The thick PCL layer delayed the onset of substrate corrosion for at least 120 h, reducing the corrosion rate by 85% compared with the PCT.

关键词： AZ31B Mg alloy Plasma electrolyte oxidation(PEO) Multi-walled carbon nanotubes(MWCNTs) Quasi-in vivo condition Polycaprolactone(PCL)

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火电厂多代理控制系统(英文)

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控制理论与应用 2004年第3期21卷 405-410页

作者：常江 Kwang Y.LEE raul GARDUNO-RAMIREZ 深圳职业技术学院机械电气工程系广东深圳518055 美国宾西法尼亚州州立大学电气工程系电气研究所仪器控制组(IIE)

针对火电厂非线性、多变量和多控制目标的特点,设计了一个火电厂多代理控制系统(PPMACS).在PP MACS中,前馈控制代理(FFCAs)采用神经模糊系统进行决策,反馈控制代理(FBCAs)采用基于遗传算法的模糊系统进行决策.优化任务分解代理(OTDAs)... 详细信息

针对火电厂非线性、多变量和多控制目标的特点,设计了一个火电厂多代理控制系统(PPMACS).在PP MACS中,前馈控制代理(FFCAs)采用神经模糊系统进行决策,反馈控制代理(FBCAs)采用基于遗传算法的模糊系统进行决策.优化任务分解代理(OTDAs)通过一个优化代理和一个分解代理来进行多目标优化分解PPMACS的任务.协调代理根据运行条件协调PPMACS的各个代理.仿真结果显示了火电厂多代理控制系统能够实现火电单元机组的多目标运行和大范围负荷跟踪.神经网络、模糊逻辑和遗传算法是PPMACS中的智能代理进行决策的有效工具.

关键词：决策反馈控制前馈控制模糊逻辑遗传算法多代理控制系统神经网络

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Intravenous haloperidol for the treatment of intractable vomiting,cyclical vomiting,and gastroparesis

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World Journal of Emergency Medicine 2021年第3期12卷 228-231页

作者： Brad E.Schwartz Karen Keller Baker Andrew J.Bleinberger Amina Lleshi raul Cruz-Cano Department of Emergency Medicine University of Maryland Capital Region HealthUM Prince George’s Hospital CenterCheverly 20785USA Ross University School of Medicine Bridgetown Bridgetown 11093Barbados Department of Epidemiology and Biostatistics School of Public Health of the University of MarylandBaltimore 21201USA

Dear editor,The incidence of emergency department(ED)visits from gastroparesis and cannabinoid hyperemesis syndrome has increased by two folds over the past decade.[1-3]Roldan et al[4]reported that patients with these conditions often have prolonged ED stays and are likely to be hospitalized because of the danger of dehydration and challenges inherent in relieving *** analgesia is a particularly troublesome treatment modality;these conditions are often chronic with frequent recurrences,and repeated opiate therapy can cause opioid dependency and narcotic bowel syndrome.[5]Haloperidol(HP)and droperidol,members of the butyrophenone class,have potent antidopaminergic activity in the chemoreceptor trigger zone.[6,7]Intramuscular administration of HP is being used increasingly in the ED to treat nausea,vomiting secondary to gastroparesis,[6]intractable vomiting,[8]and cyclical vomiting.

关键词： vomiting gastro treatment

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Preface to the Special Issue on Antarctic Meteorology and Climate:Past,Present and Future

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Advances in Atmospheric Sciences 2020年第5期37卷 421-422页

作者： Jiping LIU David BROMWICH Dake CHEN raul CORDERO Thomas JUNG Marilyn RAPHAel John TURNER Qinghua YANG Department of Atmospheric and Environmental Sciences University at AlbanyState University of New YorkAlbanyNY 12222USA Polar Meteorology Group Byrd Polar and Climate Research CenterThe Ohio State UniversityColumbusOH 43210USA State Key Laboratory of Satellite Ocean Environment Dynamics Second Institute of OceanographyHangzhou 310012China Southern Marine Science and Engineering Guangdong Laboratory(Zhuhai) Zhuhai 519082China Departamento de Física University of SantiagoSantiago 3493Chile Alfred Wegener Institute Helmholtz Centre for Polar and Marine ResearchBremerhaven 27570Germany Institute of Environmental Physics University of BremenBremen 28359Germany Department of Geography University of California-Los AngelesLos AngelesCA 90095USA British Antarctic Survey Natural Environment Research CouncilCambridgeCB30ETUK School of Atmospheric Sciences Sun Yat-sen UniversityZhuhai 519082China

The Antarctic,including the continent of Antarctica and the Southern Ocean,is a critically important part of the Earth *** in Antarctic meteorology and climate has always been a challenging *** and predicting weather patterns in the Antarctic are important for understanding their role in local-to-global processes and facilitating field studies and logistical operations in the Antarctic(e.g.,Walsh et al.,2018).Studies of climate change in the Antarctic are comparatively neglected compared to those of the ***,significant climate changes have occurred in the Antarctic in the past several decades,i.e.,a strong warming over the Antarctic Peninsula even with a recent minor cooling,a deepening of the Amundsen Sea low,a rapid warming of the upper ocean north of the circumpolar current,an increase of Antarctic sea ice since the late 1970s followed by a recent rapid decrease,and an accelerated ice loss from the Antarctic ice shelf/sheet since the late 1970s(e.g.,Turner et al.,2005;Raphael et al.,2016;Sallée,2018;Parkinson,2019;Rignot et al.,2019).Investigating recent climate change in the Antarctic and the underlying mechanisms are important for predicting future climate change and providing information to policymakers.

关键词： Antarctic warming meteorology

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Solitary Water Waves for a 2D Boussinesq Type System

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Journal of Partial Differential Equations 2010年第3期23卷 251-280页

作者： QUINTERO Jose raul Departamento de Matematicas Universidad del Valle. A. A. 25360 Cali-Colombia

We prove the existence of solitons （finite energy solitary wave） for a Boussi- nesq system that arise in the study of the evolution of small amplitude long water waves including surface tension. This Boussinesq system reduces to the generalized Benney-Luke equation and to the generalized Kadomtsev-Petviashivili equation in appropriate limits. The existence of solitons follows by a variational approach involving the Mountain Pass Theorem without the Palais-Smale condition. For surface tension sufficiently strong, we show that a suitable renormalized family of solitons of this model converges to a nontrivial soliton for the generalized KP-I equation.

关键词： Weakly nonlinear waves solitary waves (solitons) Mountain Pass theorem.

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Changes in hydrological processes in the headwater area of Yellow River,China during 1956-2019 under the influences of climate change,permafrost thaw and dam

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Advances in Climate Change Research 2023年第2期14卷 237-247页

作者： Qiang MA Hui-Jun JIN Qing-Bai WU Alla YUROVA Si-Hai LIANG raul DavidȘERBAN Yong-Chao LAN State Key Laboratory of Frozen Soils Engineering Northwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhou 730000China School of Civil Engineering Permafrost InstituteNortheast-China Observatory and Research-Station of Permafrost Geological Environment(Ministry of Education)Institute of Cold-Regions Engineering Science and TechnologyNortheast Forestry UniversityHarbin 150040China School of Water Resources and Environment China University of GeosciencesBeijing 100083China Institute for Alpine Environment Eurac ResearchBolzano 39100Italy

Discharge characteristics are crucial for detecting changes in hydrological ***,the river hydrology)in the Headwater Area of the Yellow River(HAYR)has exhibited erratic regimes(e.g.,monotonously declining/low/high hydrograph,even with normal precipitation)under the effects of climate change,permafrost thaw and changes in dam *** study integrates hydroclimatic variables(air temperature,precipitation,and potential evapotranspiration)with anthropogenic dam operation and permafrost degradation impact data to systematically examine the mechanisms of these hydrological process changes during 1956–*** results show the following:1)compared with the pre-dammed gauged flow,dam construction(January 1998–January 2000)and removal of dam(September 2018–August 2019)induced monotonously low(−17.2 m^(3) s^(−1);−61%)and high(+54.6 m^(3) s^(−1);+138%)hydrographs,respectively;2)hydroclimatic variables mainly controlled the summer–autumn hydrological processes in the HAYR;3)the monotonous decline of the hydrograph of Yellow River in the HAYR in some hydrological years(e.g.,1977,1979,1990 and 1995)was closely related with unusually high atmospheric demands of evaporation and low-intense rainfall during summer–autumn seasons;and 4)the lengthening of subsurface hydrological pathways and residence time,permafrost degradation reduced the recession coefficient(−0.002 per year)of winter flow and altered the hydrological regimes of seasonal rivers,which resulted in flattened hydrographs that reduced and delayed the peak flow(of 0.05 mm per year and 1.65 d per year,respectively)as well as boosted the winter baseflow(0.01 mm per year).This study can provide updated and systematic understanding of changing hydrological processes in typical alpine catchments on northeastern Qinghai–Tibet Plateau,China under a warming climate.

关键词： Degradation of alpine permafrost Dam Changing hydrological processes Precipitation Streamflow Evaporation

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Effects of excitation frequency on detection accuracy of orthogonal wavelet decomposition for structural health monitoring

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Earthquake Engineering and Engineering Vibration 2004年第1期3卷 101-106页

作者： raul J.Alonso Mohammad Noori Soheil Saadat Arata MasudaDepartment of Mechanical and System Engineering Kyoto Institute of Technology Matsugasaki Sakyo-ku Mechanical Engineering & eleetro Optical Systems-MS 368 1362 Brass Mill Road Department of Mechanical & Aerospace Engineering North Carolina State University

Accurate estimation of stiffness loss is a challenging problem in structural health *** this studyorthogonal wavelet decomposition is used for identifying the stiffness loss in a single degree of freedom *** effects of excitation frequency on accuracy of damage detection is *** show that pseudo-aliaseffects caused by the orthogonal wavelet decomposition(OWD),affect damage *** is demonstrated that theproposed approach is sunable for damage detection when the excitation frequency is relatively *** study shows how apriori knowledge about the signal and ability to control the sampling frequency can enhance damage detectability.

关键词： wavelet analysis damage detection structural health monitoring

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Does the provision of live black soldier fly and yellow mealworm larvae improve Muscovy duck welfare?

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畜牧与生物技术杂志(英文版) 2024年第1期

作者： Marta Gariglio Sihem Dabbou Manuela Renna Ilaria Biasato Sara Bellezza Oddon Marco Meneguz raul Daniel Miazzo Stefania Bergagna elena Colombino elisabetta Macchi Achille Schiavone

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Postural control quantification in minimally and moderately impaired persons with multiple sclerosis:The reliability of a posturographic test and its relationships with functional ability

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Journal of Sport and Health Science 2020年第6期9卷 677-684页

作者： David Barbado Ramon Gomez-Illan Pedro Moreno-Navarro Gregori Valero-Conesa raul Reina Francisco J.Vera-Garcia Department of Sport Sciences Sports Research CentreMiguel Hern_andez University of ElcheElche(Alicante)03202Spain

Background:Postural control has been associated with the functional impairment in persons with multiple sclerosis(pwMS).However,there is a need for reliable methods to assess postural control in early stages of the disease,when subtle changes can be difficult to *** aims of this study were to assess the absolute and relative reliability of a standing and a sitting posturographic protocol in minimally(Expanded Disability Status Scale≤2)and moderately(2.5≤Expanded Disability Status Scale≤4)impaired pwMS,and to analyze relationships among postural control and functional mobility and gait ***:To assess postural control in an upright stance,14 minimally and 16 moderately impaired pwMS performed six 70 s trials in tandem stance,3 with their weaker leg behind(TSWL)and 3 with their stronger leg behind(TSSL).Additionally,participants completed five 70 s trials using an unstable sitting protocol(US)to assess trunk *** mean radial errors of TSWL,TSSL,and US trials were calculated as postural control ***,participants performed the Timed Up and Go test(TUG)and the Timed 25-foot Walk test(T25FW)to measure their functional mobility and gait speed,*** was evaluated using the intraclass correlation coefficient(ICC3,1)and the standard error of measurement(SEM).Analyses of variances were carried out to assess between-group ***’g index(dg)was used to estimate the effect size of *** correlation analyses(r)were performed to examine the relationships among the postural control and the functional ***:Posturographic tests showed a high reliability in both minimally(0.87≤ICC≤0.92;9.32%≤SEM≤11.76%)and moderately(0.80≤ICC≤0.92;10.33%≤SEM≤15.33%)impaired ***,T25FW and TUG displayed a high consistency in minimally(0.89≤ICC≤0.94;3.43%≤SEM≤5.17%)and moderately(0.85≤ICC≤0.93;5.57%≤SEM≤6.56%)impaired *** impaired pwMS showed a better performance on the TUG,T25FW

关键词： Balance Consistency of the assessment Core stability Functional mobility

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Buzz-pollination in Neotropical bees:genus-dependent frequencies and lack of optimal frequency for pollen release

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Insect Science 2020年第1期27卷 133-142页

作者： Conrado Augusto Rosi-Denadai Priscila Cassia Souza Araujo Lucio Antonio de Oliveira Campos Lirio Cosme Jr. raul Narciso Carvalho Guedes Departamento de Entomologia Universidade Federal de VigosaVigosaMinas GeraisBrazil Departamento de Biologia Geral Universidade Federal de VigosaVigosaMinas GeraisBrazil

Over 50 genera of bees release pollen from flower anthers using thoracic vibrations,a phenomenon known as *** efficiency of this process is directly affected by the mechanical properties of the buzzes,namely the duration,amplitude,and ***,although the effects of the former two properties are well described,the role of buzz frequency on pollen release remains ***,nearly all of the existing studies describing vibrational properties of natural buzz-pollination are limited to bumblebees(Bombus)and carpenter bees(Xvlocopa)constraining our current understanding of this behavior and its ***,we attempted to minimize this shortcoming by testing whether flower anthers exhibit optimal frequency for pollen release and whether bees tune their buzzes to match these(optimal)*** true,certain frequencies will trigger more pollen release and lighter bees will reach buzz frequencies closer to this optimum to compensate their smaller buzz *** strategies were used to test these hypotheses:(i)the use of(artificial)vibrational playbacks in a broad range of buzz frequencies and amplitudes to assess pollen release by tomato plants(Solarium Ivcopersicum L.)and(ii)the recording of natural buzzes of Neotropical bees visiting tomato plants during *** playback experiment indicates that although buzz frequency does affect pollen release,no optimal frequency exists for *** addition,the recorded results of natural buzz-pollination reveal that buzz frequencies vary with bee genera and are not correlated with body ***,neither bees nor plants are tuned to optimal pollen release *** frequency of buzz-pollination is a likely consequence of the insect flight machinery adapted to reach higher accelerations,while flower plant response to buzz-pollination is the likely result of its pollen granular properties.

关键词： buzz amplitude buzz frequency floral sonication pollination stingless bees vibration

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