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Transformation of leather waste into microwave-activated and N-doped carbon for Li-S batteries

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新型炭材料(中英文) 2025年

作者： Carolina Pano-Azucena Roberto Rosas-Rangel Miguel Olvera-Sosa David Salvador González-González Rene Rangel-Mendez Luis Felipe Chazaro-Ruiz Miguel Avalos-Borja Javier antonio Arcibar-Orozco CIATEC.Center for Applied Innovation in Competitive Technologies Tecnologico de Monterrey School of Engineering and Sciences Instituto Potosino de Investigación Científica y Tecnológica Universidad Autónoma de Coahuila Facultad de SistemasCiudad Universitaria

The use of carbon from waste biomass has the potential to buffer the drawbacks of Li-S batteries and improve their overall performance. Chrome-Tanned-LeatherShavings(CTLS) are undesirable wastes, highly available for transformation into porous carbon. Microwave activation is an efficient state-of-the-art procedure to obtain unique porous structures and nitrogen incorporation can improve the performance of porous carbons. This study proposes the transformation of CTLS into a microwave activated porous carbon, and then was modified to introduce nitrogen. A microporous activated carbon with a specific surface area of 556 m2g-1 with honeycomb-like structure was obtained. Both urea thermal decomposition and ethanolamine impregnation improves the nitrogen and amine presence of surface groups. However,the results indicated that only urea treatment was effective in improving the initial capacity of the cell(1363 mAhg-1), which is probably linked with the sorption of long-chain polysulfides. This investigation confirms that it is possible to obtain carbon materials from CTLS, for use as sulfur-host cathodes in Li-S batteries, and improve their performance with urea thermal decomposition. Furthermore, a Radial basis function neural network was fitted to provide statistical support to the experimental results. The trained model corroborated the importance of nitrogen content of the carbons in the discharge capacity of the cells.

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A NETWORK ANALYSIS OF THE 2010 FIFA WORLD CUP CHAMPION TEAM PLAY

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Journal of Systems Science & Complexity 2013年第1期26卷 21-42页

作者： COTTA carlos MORA antonio M MERELO Juan Julin MERELO-MOLINA Cecilia Department of Computer Science University of Mlaga Department of Architecture and Computer Technology University of Granada

This paper analyzes the network of passes among the players of the Spanish team during the last FIFA World Cup 2010,where they emerged as the champion,with the objective of explaining the results obtained from the behavior at the complex network *** team is considered a network with players as nodes and passes as(directed) edges.A temporal analysis of the resulting passes network is also done,looking at the number of passes,length of the chain of passes,and to network measures such as player centrality and clustering *** of the last three matches(the decisive ones) indicate that the clustering coefficient of the pass network remains high,indicating the elaborate style of the Spanish *** effectiveness of the opposing team in negating the Spanish game is reflected in the change of several network measures over time,most importantly in drops of the clustering coefficient and passing length/speed,as well as in their being able in removing the most talented players from the central positions of the ***'s ability to restore their combinative game and move the focus of the game to offensive positions and talented players is shown to tilt the balance in favor of the Spanish team.

关键词： Complex network complex systems FIFA World Cup football La Roja network analysis soccer Spanish team sports.

Nanostructural Evolution of Sugarcane Rind and Pith Submitted to Hydrothermal Pretreatments

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Journal of Renewable Materials 2018年第2期6卷 152-159页

作者： Marcelo M.Oliveira antonio A.S.Curvelo carlos Driemeier Brazilian Bioethanol Science and Technology Laboratory(CTBE) Brazilian Center for Research in Energy and Materials(CNPEM)Caixa Postal 619213083-970CampinasSão PauloBrasil São carlos School of Engineering(EESC) University of São Paulo(USP)Caixa Postal 78013560-970São CarlosSão PauloBrasil São carlos Institute of Chemistry(IQSC) University of São Paulo(USP)Caixa Postal 78013560-970São CarlosSão PauloBrasil

Lignocellulose conversion into cellulosic ethanol and coproducts starts with a pretreatment *** current industrial plants of cellulosic ethanol use thermochemical pretreatments under hydrothermal conditions,with or without addition of acid *** pretreatments modify biomass chemistry and morphology,particularly at the *** this work,we use X-ray diffraction,dynamic vapor sorption and calorimetric thermoporometry to investigate the biomass nanostructural changes promoted by hydrothermal *** compare and differentiate the rind and pith fractions of sugarcane stalks in order to contribute to the understanding of rind-pith contrasting ***,for both cane fractions our results point consistently to cellulose co-crystallization,lignin aggregation,and opening of nanoscale pores as the main nanostructural phenomena occurring during hydrothermal treatments.

关键词： Cellulose bagasse sugarcane cellulosic ethanol pretreatment

Attosecond twisted beams from high-order harmonicgeneration driven by optical vortices

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High Power Laser Science and Engineering 2017年第1期5卷 12-19页

作者： carlos Hernandez-Garcia Laura Rego Julio San Roman antonio Picon Luis Plaja Grupo de Investigacion en Aplicaciones del Laser y Fotonica Departamento de Fisica AplicadaUniversity of SalamancaE-37008SalamancaSpain Argonne National Laboratory Argonne1L 60439USA

Optical vortices are structures of the electromagnetic field with a spiral phase ramp about a point-phase singularity,carrying orbital angular momentum(OAM). Recently, OAM has been imprinted to short-wavelength radiation through high-order harmonic generation(HHG), leading to the emission of attosecond twisted beams in the extreme-ultraviolet(XUV) regime. We explore the details of the mapping of the driving vortex to its harmonic spectrum. In particular, we show that the geometry of the harmonic vortices is convoluted, arising from the superposition of the contribution from the short and long quantum paths responsible of HHG. Finally, we show how to take advantage of transverse phase-matching to select twisted attosecond beams with different spatiotemporal properties.

关键词： attosecond science extreme-ultraviolet vortices high harmonic generation orbital angular momentum twisted beams vortexbeams

A numerical assessment of two geometries for reducing elbow erosion

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Particuology 2020年第2期18卷 117-133页

作者： carlos antonio Ribeiro Duarte Francisco Joséde Souza Diego Nei Venturi Martin Sommerfeld Department of Engineering Federal University of Goiás-Regional Catal(a)oAv.Dr.Lamartine Pinto de Avelar1120Catal(a)oGoiásBrazil School of Mechanical Engineering Federal University of Uberl(a)ndiaAv.Joāo Naves de(A)vila2121 Bloco 5PUberl(a)ndiaMinas GeraisBrazil Multiphase Flow Systems(MPS) Otto-von-Guericke-University MagdeburgZeppelinstraβe 1D-06130 Halle(Saale)Germany

Elbows in pneumatic conveying systems are normally prone to the erosive effects of conveyed *** are a number of solutions available to reduce such damage.A widely used geometric alternative for replacing the 90°elbow and reducing erosive wear is the plugged *** option,although less commonly used,is the vortex-chamber *** both cases,the effective reduction in erosion brought about is unclear,as it strongly depends on the operating *** present study assesses relative erosion among the plugged tee,vortex-chamber elbow,and standard elbow for a dilute gas-solid multiphase flow.A numerical model is employed to predict the penetration ratio and validated using experimental data for the plugged *** are run for the standard and vortex-chamber elbows and plugged tee under the same conditions to compare the mechanics involved and the relative erosion *** analysis uses variables relating to particle-wall interactions(impact angle,impact velocity,impact frequency)to illustrate the nature of the erosive process in each pipe *** general,the geometric configurations of both the plugged tee and vortex-chamber elbow promote changes in particle dynamics that reduce the rate of *** the basis of the relative erosion of the standard elbow,the plugged tee proves to be an interesting option in cases of a low mass loading,while the vortex-chamber elbow demonstrates its erosion reduction potential for higher mass loading ***,the advantages and disadvantages of each fitting are highlighted.

关键词： Relative erosion Plugged tee Erosion reduction Pipe fitting Computational fluid dynamics

Brent *** Texas Intermediate in the US petro derivatives price formation

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Petroleum Science 2024年第1期21卷 729-739页

作者： Alejandro Almeida antonio A.Golpe Juan Manuel Martín-Alvarez Jose carlos Vides Universidad Internacional de La Rioja Department of Quantitative Methods for Economics and BusinessLa RiojaSpain University of Huelva Department of Economics and Centro de Estudios Avanzados en FisicaMatematicas y Computacion and ICEIHuelvaSpain Complutense University of Madrid Department of Applied and Structural Economics and History and ICEIMadridSpain

In this paper,we apply the spatial panel model to explore the relationship between the dynamic of two types of crude oil prices(WTI and Brent crude oil)and their refined products over *** the turbulent months of 2011,when Cushing Oklahoma had reached capacity and the crude oil export ban removal in 2015 as breakpoints,we apply this method both in the full sample and the three resultant ***,results suggest our results show that both WTI and Brent display very similar behaviour with the refined ***,when attending to each regime,results derived from the first and third regimes are quite similar to the full sample ***,during the second regime,Brent crude oil became the benchmark in the petrol market,and it influenced the distillate ***,our model can let us determine the price-setters and price-followers in the price formation mechanism through refined *** results possess important considerations to policymakers and the market participants and the price formation.

关键词： Crude oil prices Spatial panel model Refined products Price formation

The long-COVID-19 in older adults: facts and conjectures

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Neural Regeneration Research 2022年第12期17卷 2679-2681页

作者： Tino Emanuele Poloni Valentina Medici antonio Zito Arenn Faye carlos Department of Neurology-Neuropathology and Abbiategrasso Brain Bank Golgi-Cenci Foundation&Department of RehabilitationASP Golgi-Redaelli-AbbiategrassoMilanItaly Department of Neurology-Neuropathology and Abbiategrasso Brain Bank Golgi-Cenci Foundation-AbbiategrassoMilanItaly Department of Brain and Behavioral Disorders University of Pavia&IRCCS Mondino FoundationPaviaItaly

The coronavirus disease-19(COVID-19)has greatly affected the overall health of the elderly population through direct biological(infection-related)and indirect psychosocial(quarantine-and isolation-related)*** the severe form of COVID-19 most frequently targets this population,the prevalence of long-term sequelae is expected to rise consequentially in people≥65 years *** prominent neuropsychiatric consequences of COVID-19 and the cognitive frailty seen in older adults can both have a negative impact on their mental *** explore the behavioral,neurological,and psychosocial consequences of COVID-19,we conducted separate studies on different populations of older adult people residing in Lombardy-the Italian epicenter of the first pandemic wave in spring 2020.

关键词： consequences Italian COV

A quadratic linear-parabolic model-based EEG classification to detect epileptic seizures

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The Journal of Biomedical Research 2020年第3期34卷 205-212页

作者： antonio Quintero-Rincon carlos DGiano Hadj Batatia Epilepsy and Telemetry Integral Center Foundation for the Fight against Pediatric Neurological DiseaseMontaneses 2325Buenos Aires C1428AQKArgentina Computer Science Research Institute of Toulouse-National Polytechnic Institute of Toulouse University of ToulouseToulouseCedex 7 B.P.7122-31071France

The two-point central difference is a common algorithm in biological signal processing and is particularly useful in analyzing physiological *** this paper,we develop a model-based classification method to detect epileptic seizures that relies on this algorithm to filter electroencephalogram(EEG) *** underlying idea was to design an EEG filter that enhances the waveform of epileptic *** filtered signal was fitted to a quadratic linear-parabolic model using the curve fitting *** model fitting was assessed using four statistical parameters,which were used as classification features with a random forest algorithm to discriminate seizure and non-seizure *** proposed method was applied to 66 epochs from the Children Hospital Boston *** showed that the method achieved fast and accurate detection of epileptic seizures,with a92% sensitivity,96% specificity,and 94.1% accuracy.

关键词： two-point central difference curve fitting parabolic curves epilepsy electroencephalogram random forest

The coppice-with-standards silvicultural system as applied to Eucalyptus plantations-a review

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Journal of Forestry Research 2014年第2期25卷 237-248页

作者： antonio carlos FERRAZ FILHO José Roberto Soares SCOLFORO Blas MOLA-YUDEGO Departamento de Ciências Florestais Universidade Federal de Lavras (UFLA) School of Forest Sciences University of Eastern Finland (UEF)

We review the management of Eucalyptus species under a coppice-with-standards （CWS） silvicultural system. CWS management results in product diversification, permitting production of small and large scale timber from the same stand. Eucalyptus species are suitable candidates for CWS management because： there are large worldwide plantation areas, sprouting capacity is high, and eucalypts are multipur- pose species. We discuss （1） short rotation Eucalyptus coppice manage- ment for energy and pulping and （2） Eucalyptus seedling management for solid wood products. We review the literature and discuss experi- ences with Eucalyptus managed under the CWS system. We also assess projects dealing with Eucalyptus coppice management, stand density regulation, pruning, and stand and wood quality. The growth environ- ment of the standard trees （heavy competition up to the first harvest, free growth afterwards） coupled with long rotations （〉20 years） results in high quality logs for solid wood products. Early pruning should be ap- plied to enhance wood quality. We propose a system for the silvicultural management of Eucalyptus under the CWS system, elaborating on the consequences of initial planting density, site productivity, and standard tree densities as well as timing of basic silvicultural applications.

关键词： stand density regulation coppice management pruning silvicultural system stand production diversification CWS