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Cerium,manganese and cerium/manganese ceramic monolithic *** of VOCs and PM removal

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Journal of Rare Earths 2016年第7期34卷 675-682页

作者： COLMAN-LERNER esteban PELUSO Miguel Andres SAMBETH Jorge THOMAS Horacio Centro de Investigacion y Desarrollo en Ciencias Aplicadas"Dr.Jorge J.Ronco"CONICET CCT La Plata UNLP47 N0 257(1900)La PlataArgentina Fac.de Ciencias Exactas UNLP47 and 115(1900)La PlataArgentina Centro de Investigaciones del Medio Ambiente(CIMA).Facultad de Ciencias Exactas UNLP.47y 115.1900-La Plata Planta Piloto Multiproposito PLAPIMU CICPBA-UNLPC.Centenario and 506M ***Argentina

Ceramic supported cerium, manganese and cerium-manganese catalysts were prepared by direct impregnation of aq precursor, and characterized by scanning electron microscopy （SEM）, X-ray diffraction （XRD）, Brunauer-Emmett-Teller rn （BET）, temperature programmed reduction （Ha-TPR）, X-ray photoelectron spectroscopy （XPS） acidity measurements and elec conductivity. The catalytic activity was evaluated for volatile organic compounds （VOC）（ethanol, methyl ethyl ketone and tol oxidation. Additionally, catalysts were tested in particulate matter （PM） combustion. The characterization results indicated that Ce was in the form of Ce4＋ and Ce3＋, and Mn existed in the form of Mn4＋ and Mn3＋ on the surface of the Mn/AC sample and in the of Mn4＋ in the Ce/Mn/AC monolith. VOC oxidation results revealed that the Ce/Mn/AC sample showed an excellent perforr compared with ceramic supported CeO2 （Ce/AC） and MnO, （Mn/AC） samples. The PM combustion was also higher on Ce/M monoliths. The enhanced catalytic activity was mainly attributed to the Ce and Mn interaction which enhanced the acidity, cond ity and the reducibility of the oxides.

关键词： monolith VOCs MnOx Ce PM clays rare earths

One step synthesis of high efficiency nickel/mesoporous TiO_2 hybrid catalyst for hydrogen evolution reaction

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Journal of Energy Chemistry 2019年第2期28卷 79-87页

作者： esteban A.Franceschini Melisa J.Gomez Gabriela I.Lacconi INFIQC-CONICET Dto.de Fisicoquímica – Facultad de Ciencias QuímicasUniversidad Nacional de CórdobaCiudad Universitaria Departamento de Física de la Materia Condensada Centro Atómico ConstituyentesComisión Nacional de Energía Atómica

Nickel-Ti O_2 hybrid catalysts are synthesized by electrodeposition and their catalytic activity with respect to the hydrogen evolution reaction is *** types of titanium oxide particles,which are commercial particles of dense Ti O_2 and mesoporous TiO_2 particles synthesized by an aerosol method,are incorporated into the matrix of the nickel *** nickel catalysts containing Ti O_2 particles presented higher catalytic activity than the conventional nickel Watts *** TiO_2-modified nickel catalyst showed the highest catalytic activity towards HER in alkaline *** addition,this type of nickel catalyst increases its catalytic activity after ageing treatment,which is an indication of an increase in the electro-active area of the electrode.

关键词： Co-deposition Impedance spectroscopy Titanium oxide Ageing process Raman spectroscopy

Triply Factorised Groups and the Structure of Skew Left Braces

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Communications in Mathematics and Statistics 2022年第2期10卷 353-370页

作者： A.Ballester-Bolinches R.esteban-Romero Departament de Matematiques Universitat de ValenciaDr.Moliner5046100 BurjassotValenciaSpain Institut Universitari de Matematica Pura i Aplicada Universitat Politecnica de ValenciaCami de Veras/n46022 ValenciaSpain

The algebraic structure of skew left brace has proved to be useful as a source of settheoretic solutions of theYang-Baxter *** study in this paper the connections between left and right π-nilpotency and the structure of finite skew left *** also study factorisations of skew left braces and their impact on the skew left brace *** a consequence of our study,we define a Fitting-like ideal of a left *** approach depends strongly on a description of a skew left brace in terms of a triply factorised group obtained from the action of the multiplicative group of the skew left brace on its additive group.

关键词： Skew left brace Trifactorised group Triply factorised group Left nilpotent skew left brace Right nilpotent skew left brace Ideal Left Fitting ideal Factorised skew left brace

Discretized Miller approach to assess effects on boundary layer ingestion induced distortion

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Chinese Journal of Aeronautics 2017年第1期30卷 235-248页

作者： esteban Valencia Víctor Hidalgo Devaiah Nalianda Laskaridis Panagiotis Riti Singh Departamento de Ingeniería Mecánica Facultad de Ingeniería Mecánica Escuela Politécnica Nacional Ladron de Guevara E11-253 Quito 17-01-2759 Ecuador School of Engineering Cranfield University Bedford MK430AL United Kingdom

The performance of propulsion configurations with boundary layer ingestion（BLI） is affected to a large extent by the level of distortion in the inlet flow field. Through flow methods and parallel compressor have been used in the past to calculate the effects of this aerodynamic integration issue on the fan performance; however high-fidelity through flow methods are computationally expensive, which limits their use at preliminary design stage. On the other hand, parallel compressor has been developed to assess only circumferential distortion. This paper introduces a discretized semi-empirical performance method, which uses empirical correlations for blade and performance calculations. This tool discretizes the inlet region in radial and circumferential directions enabling the assessment of deterioration in fan performance caused by the combined effect of both distortion patterns. This paper initially studies the accuracy and suitability of the semiempirical discretized method by comparing its predictions with CFD and experimental data for a baseline case working under distorted and undistorted conditions. Then a test case is examined,which corresponds to the propulsor fan of a distributed propulsion system with BLI. The results obtained from the validation study show a good agreement with the experimental and CFD results under design point conditions.

关键词： BLI Correlations Distortion Embedded propulsors Empirical Mean-line analysis Turbomachinery

Tips and tricks for cannabinoid receptor 1 detection, interaction and interpretation

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Neural Regeneration Research 2021年第8期16卷 1535-1536页

作者： Pedro F.esteban Eduardo Molina-Holgado Laboratory of Neuroinflammation Hospital Nacional de Parapléjicos(SESCAM)ToledoSpain

Proteomic approaches are currently used to explore and identify interacting partners of proteins involved in diverse biological processes or with therapeutic *** cannabinoid receptor 1,CB_1,is the main mediator of cannabinoids effects in the central nervous *** role of the endocannabinoid system in development and physiology and as a target of pharmacological and cellular therapies is the subject of intense ***。

关键词： potential. interaction intense

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应用机器学习对外卖含糖饮料消费的研究

农业经济问题 2024年第7期 20-33页

作者：翟倩倩蒋玉张家铭胡安·埃斯特班·格瓦拉王红浙江大学中国农村发展研究院杭州310058 西南财经大学中国西部经济研究院成都611130 普渡大学农业经济系西拉法叶47907 普渡大学统计系西拉法叶47907

含糖饮料因其高热量而导致慢性疾病,引起的健康问题得到全球的关注。在外卖平台迅速发展的大背景下,本文基于中国六个城市的外卖平台的销售数据,运用机器学习方法识别外卖含糖饮料消费动态,并对价格折扣、糖税等模拟情景进行了销售变动... 详细信息

含糖饮料因其高热量而导致慢性疾病,引起的健康问题得到全球的关注。在外卖平台迅速发展的大背景下,本文基于中国六个城市的外卖平台的销售数据,运用机器学习方法识别外卖含糖饮料消费动态,并对价格折扣、糖税等模拟情景进行了销售变动分析。研究发现,第一,有监督机器学习模型中的神经网络相较于传统计量回归模型更加适用于消费趋势预测分析。第二,模型预测结果表明,当价格降低10%时,总销售额将比原始销售增加0.49%,说明含糖饮料消费富有价格弹性;此外,当价格上升10%时,总销量额将比原始销售下降0.17%,表明通过税收手段来减少含糖饮料的消费是可行策略。第三,外卖含糖饮料的销售情况存在时空差异,长三角地区外卖含糖饮料的销售量高于其他地区,周中的销售量高于周末时段,下午的销售量是一天的高峰。本文研究对于建立降低含糖饮料的过度消费的路径与机制,引导消费者健康饮食选择,推动外卖服务行业的可持续发展具有重要意义。

关键词：含糖饮料外卖机器学习神经网络

Hydrogen evolution kinetics on Ni cathodes modified by spontaneous deposition of Ag or Cu

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Journal of Energy Chemistry 2017年第3期26卷 466-475页

作者： esteban A.Franceschini Gabriela I.Lacconi Horacio R.Corti INFIQC-CONICET Departamento de Fisicoquímica–Facultad de Ciencias QuímicasUniversidad Nacional de CórdobaCiudad Universitaria5000 CórdobaArgentina Departamento de Física de la Materia Condensada Centro Atómico ConstituyentesComisión Nacional de Energía AtómicaAv.Gral.Paz 1499(B1650KNA)San MartínBuenos AiresArgentina INQUIMAE-CONICET Facultad de Ciencias Exactas y NaturalesUniversidad de Buenos AiresCiudad UniversitariaPabellón IIC1428EHABuenos AiresArgentina

Nickel modification by spontaneous deposition of transition metals such as Ag and Cu is shown as an economic and simple alternative for the activation of hydrogen evolution reaction（HER） on cathodes in alkaline media. The kinetics of HER is studied on Ni/Ag and Ni/Cu catalysts by cyclic voltammetry and electrochemical impedance spectroscopy（EIS） using a rotating disk electrode（RDE）. Freshly synthesized catalysts, as well as catalysts subjected to a short chronoamperometric ageing procedure, are analyzed and the kinetic and thermodynamic parameters of the HER are obtained. The nickel surface modified with transition metals with an outer shell electronic configuration [xd;（x+1）s;], such as Cu(3d;4s;)and Ag(4d;5s;), shows an improved activity for the HER compared to bare nickel. Furthermore, the Ni/Cu catalyst presents a decreased onset potential. The hydrogen evolution rate, measured as current density at –1.5 V（vs. SCE）, is similar on Ni/Cu and Ni/Ag electrodes.

关键词： Hydrogen evolution reaction Spontaneous deposition Nickel/Silver Nickel/Copper Electrochemical impedance spectroscopy

Back to pluripotency:fully chemically induced reboot of human somatic cells

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Signal Transduction and Targeted Therapy 2022年第8期7卷 2658-2659页

作者： Lucas Lange Miguel A.esteban Axel Schambach Institute of Experimental Hematology Hannover Medical SchoolHannover 30625Germany REBIRTH Research Center for Translational Regenerative Medicine Hannover Medical SchoolHannover 30625Germany Laboratory of Integrative Biology Guangzhou Institutes of Biomedicine and HealthChinese Academy of SciencesGuangzhou 510530China Division of Hematology/Oncology Boston Children’s HospitalHarvard Medical SchoolBostonMA 02115USA

In a recent study published in Nature,Guan et al.1 showed an exciting strategy to reprogram human somatic cells into human chemically induced pluripotent stem cells(hCiPSCs).Thereby,they identified crucial steps and p... 详细信息

关键词： al. chemically steps

Using Leading Indicators to Improve Project Performance Measurement

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Journal of Systems Science and Systems Engineering 2019年第5期28卷 529-554页

作者： Li Zheng Claude Baron Philippe esteban Rui Xue Qiang Zhang Shanlin Yang LAAS-CNRS Université de Toulouse Toulouse France School of Management Hefei University of Technology HefeiChina

Project performance measurement offers a wide range of methods to help project managers monitor ***,several critical issues remain in project performance measurement,such as an unbalanced use of indicators due to a lack of prediction-based (leading) indicators with regard to outcome-based (lagging) *** its part,systems engineering measurement,although a more recent discipline,offers a wide variety of indicators,including a set of leading *** our objective is to increase project performance and success rates,this involves improving project performance measurement on which project management decisions are *** purpose,the proposal put forward in this paper is to extend the number and type of indicators used in project performance measurement by adapting the leading indicators defined in systems engineering *** methodology involves first mapping the systems engineering indicators with the project management activities,resulting in identification of a set of potentially useful indicators for measuring the different activities,then tailoring a selection of these indicators with project-specific data to define a set of the most relevant indicators for a given *** methodology is illustrated by means of a case study in a manufacturing company.

关键词： Project performance measurement systems engineering measurement leading indicators lagging indicators