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Complementarity of electric vehicles and pumped-hydro as energy storage in small isolated energy systems:case of La Palma,Canary Islands

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journal of Modern Power Systems and Clean Energy 2016年第4期4卷 604-614页

作者： Alfredo RAMIREZ-DIAZ francisco j.RAMOS-REAL Gustavo A.MARRERO Departamento de Economı´a Contabilidad y FinanzasFacultad de Economı´aEmpresa y TurismoUniversidad de La Laguna38071 La LagunaSpain Instituto Universitario de Ciencias Polı´ticas y Sociales Universidad de La Laguna38071 La LagunaSpain Instituto Universitario de Desarrollo Regional Universidad de La Laguna38071 La LagunaSpain

Isolated energy systems in archipelagos are characterized for having a great dependence on fossil sources due to isolation and territorial *** island of La Palma is situated on the northwest of the Canary Islands,and its electric system is very *** policies planned by local authorities are aimed to increase the share of renewable energies and the reduction of fossil ***,intermittence and the concentration of unmanageable renewable energies in few locations may hinder the operation of the *** order to solve these problems,energy storage plays an essential *** aim of this paper is to analyse the effects of the introduction of two possible alternatives as a way of energy storage:pumped hydro storage and electric *** this,we use a simulation model adapted to the features of La Palma,considering different *** show that,in the most favourable scenario,the installation of an additional 25 MW from renewables(more than double the current power),supported by 20 MW of pumped hydro storage and a fleet of 3361 electric vehicles,would allow the current share of renewables to increase from11%(in 2015)to 49%.Furthermore,this would mean a 26%reduction in CO2 emissions,10%in costs of generated k Wh and 19%in energy dependence.

关键词： Energy storage Electric vehicles Vehicle-to-grid Grid-for-vehicles Pumped-hydro energy storage Isolated systems

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Predicting EHL film thickness parameters by machine learning approaches

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Friction 2023年第6期11卷 992-1013页

作者： Max MARIAN jonas MURSAK Marcel BARTZ francisco j.PROFITO Andreas ROSENKRANZ Sandro WARTZACK Department of Mechanical and Metallurgical Engineering School of EngineeringPontificia Universidad Católica de ChileSantiago6904411Chile Engineering Design Friedrich-Alexander-University Erlangen-Nuremberg(FAU)Erlangen91058Germany Department of Mechanical Engineering Polytechnic School of the University of São PauloSão Paulo05508-030Brazil Department of Chemical Engineering Biotechnology and Materials(DIQBM)FCFMUniversidad de ChileSantiago8370456Chile

Non-dimensional similarity groups and analytically solvable proximity equations can be used to estimate integral fluid film parameters of elastohydrodynamically lubricated(EHL)*** this contribution,we demonstrate that machine learning(ML)and artificial intelligence(AI)approaches(support vector machines,Gaussian process regressions,and artificial neural networks)can predict relevant film parameters more efficiently and with higher accuracy and flexibility compared to sophisticated EHL simulations and analytically solvable proximity equations,*** this purpose,we use data from EHL simulations based upon the full-system finite element(FE)solution and a Latin hypercube *** verify that the original input data are required to train ML approaches to achieve coefficients of determination above *** is revealed that the architecture of artificial neural networks(neurons per layer and number of hidden layers)and activation functions influence the prediction *** impact of the number of training data is exemplified,and recommendations for a minimum database size are *** ultimately demonstrate that artificial neural networks can predict the locally-resolved film thickness values over the contact domain 25-times faster than FE-based EHL simulations(R^(2) values above 0.999).We assume that this will boost the use of ML approaches to predict EHL parameters and traction losses in multibody system dynamics simulations.

关键词： machine learning elastohydrodynamic lubrication film thickness support vector machine Gaussian process regression artificial neural network

Validation of GIS layers in the EU:getting adapted to available reference data

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International journal of Digital Earth 2011年第S01期4卷 42-57页

作者： francisco javier Gallego IPSC Joint Research Centre of the ECIspraItaly

An optimal validation of a thematic map would ideally require in-situ observations of a large sample of units specifically conceived for the map under *** is often not possible due to budget *** alternative can be using photo-interpretation of high or very high resolution images instead of in-situ observations or using available data sets that do not fully comply with the ideal characteristics:unit size,reference date or sampling *** paper illustrates some examples of use of available data in the European *** land cover maps,the best existing data set is probably Land Use/Cover Areaframe Survey(LUCAS)that has been conducted by Eurostat on four occasions since *** LUCAS is based on systematic sampling,advantages and limitations of systematic sampling are discussed.A fine-scale population density map is presented as an example of a situation in which reference data on a statistical sample cannot be collected.

关键词： accuracy assessment area frame sampling systematic sampling LUCAS land cover maps population density

Advanced Oxidation Wastewater Treatment of 3 LPS of an Avocado Sauce Company,at Morelia,Michoacan,Mexico

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journal of Environmental Science and Engineering(A) 2024年第5期13卷 151-155页

作者： Alfonso Espitia-Cabrera francisco javier Barrón-Santos joséL.Méndez-Antonio Héctor M.Alemán-Vásquez Omar G.Color-Vázquez Saneamiento y Planeación Ambiental Azcapotzalco CDMX 02200México Energy Department Metropolitan Autonomous University Azcapotzalco CampusCDMX 02200Mexico Environmental System Engineering Department Environmental Engineering AcademyNational School of Biological SciencesNational Polytechnic InstituteCiudad de MéxicoCDMX 07738México Planta Congeladora y Empacadora Nacional Morelia 58190MichoacánMéxico

This paper describes the wastewater treatment of 3 liters per second of capacity of discharges of capacity,from the avocado washed,as well as the production of avocado *** were pretreated with a grease and oil trap and contained small amounts of oil and grease,dissolved and total solids,organic matter and trace of organic and inorganic compounds from the vitamins and minerals of *** treatment train is located in an small surface and the train is integrated with coagulation in line with alumina in a static mixer,rapid filtration in two steps,double advanced oxidation with ozone and heterocyclic photocatalysis with a nanofilm of zinc oxide as,photocatalyzer and final adsorption of refractory compounds with activated *** treated wastewater meets the environmental regulation to urban sewerage discharges of the city,according to the results of a Mexican Certified Laboratory.

关键词： Wastewater primary treatment rapid filter performance static mixer

A Proposal for the Automatic Computation of Envelopes of Families of Plane Curves

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journal of Systems Science & Complexity 2019年第1期32卷 150-157页

作者： BOTANA francisco RECIO Tomás Depto. de Matemática aplicada I Universidad de Vigo Campus A Xunqueira Depto. de Matemáticas Estad'?stica y Computación Universidad de Cantabria

The idea of envelope of a family of plane curves is an elementary notion in differential geometry. As such, its implementation in dynamic geometry environments is quite universal(Cabri,The Geometer's Sketchpad, Cinderella, Geo Gebra,...). Nevertheless, most of these programs return,when computing certain envelopes, both some spurious solutions and the curves that truly ?t in the intuitive de?nition of envelope. The precise distinction between spurious and genuine parts has not been made before: This paper proposes such distinction in an algorithmic way, ready for its implementation in interactive geometry systems, allowing a ?ner classi?cation of the different parts resulting from the current, advanced approach to envelope computation and, thus, yielding a more precise output, free from extraneous components.

关键词： Automated deduction in geometry dynamic geometry envelopes parametric polynomial systems symbolic computation

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Different maternal investment strategies for male and female calves in a polygynous mammal

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Current Zoology 2019年第3期65卷 269-277页

作者： francisco CEACERO Martina KOMARKOVA Andres j.GARCIA Laureano GALLEGO Department of Animal Science and Food Processing Faculty of Tropical AgriSciencesCzech University of Life Sciences Kamycka 12916500 Praha 6-Suchdol Czech Republic Department of Ethology Institute of Animal Science Pratelstvi 815 10401 Praha - Uhnneves Czech Republic Instituto de Investigacion en Recursos Cinegeticos (IREC) Consejo Superior de Investigaciones Cientificas-Universidad de Castilla-La Mancha-Junta de Comunidades de Castilla-La Mancha (CSIC-UCLM-JCCM) Ronda de Toledo s/n 13071 Ciudad RealSpain Seccion de Recursos Cinegeticos y Ganaderos Instituto de Desarrollo Regional (IDR)02071 AlbaceteSpain Departamento de Ciencia y Tecnologia Agroforestal y Genetica ETSIAM Universidad de Castilla-La Mancha(UCLM)02071 AlbaceteSpain

Mater nal effects occur whe n the phe no type of the mother in flue nces that of the young to the detriment of her survival, growth or fitn ess. The in vestment of the mother can be affected by mater nal body condition and/or experience. Trivers-Willard Hypothesis (TWH) and Local Resource Competition Hypothesis (LRCH) are the main hypotheses used to explain bias in birth sex-ratios in mammals, as well as for sex-biased maternal investment. Both hypotheses suggest that a different amount of investment must be expected according to the sex of the young. However, recent studies suggest that these differences are not in quantity but in the strategies: mechanisms and objectives may differ for each sex. We studied how maternal characteristics (age, body mass, body condition, and domi nance status) influence re leva nt aspects of the birth and early growth of the calf (birth date, birth body mass, body mass at weaning, and body condition at weaning) separately for each sex;and how that investment is mediated by milk production and composition (lactose, fat, and protein). One hundred eighty-eight newborns from 75 captive red deer hinds aged from 2 to 19 years were analyzed. The main differential investment observed was related to birth date: when producing a female, hinds give birth earlier in the season only if they have a good body condition;however, when gestating a male it is the older hinds those which deliver earlier. Subsequently, milk production and composition are correlated with birth body mass in female calves, but to weaning body mass in males. Thus, only hind body mass affects the weaning body mass of female calves, compared with age and hind body mass in males. These results suggest that while TWH fits the maternal investment strategy found for male calves, it is LRCH which correlates with the maternal investment patterns observed for females.

关键词： birth date body condition local resources competition hypothesis milk production sex-ratio Trivers-Willard hypothesis

GSTARS computer models and their applications, part I:theoretical development

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International journal of Sediment Research 2008年第3期23卷 197-211页

作者： Chih Ted YANG francisco j. M. SIMES Borland Prof. of Water Resources and Director of Hydroscience and Training Center Department of Civil and Environmental Engineering Colorado State University Fort Collins CO 80523-1372 U. S. A. Research Hydrologist US Geological Survey Geomorphology and Sediment Transport Laboratory 4620 Technology Drive Suite 400 Golden CO 80403 U. S. A.

GSTARS is a series of computer models developed by the U.S. Bureau of Reclamation for alluvial river and reservoir sedimentation studies while the authors were employed by that agency. The first version of GSTARS was released in 1986 using Fortran IV for mainframe computers. GSTARS 2.0 was released in 1998 for personal computer application with most of the code in the original GSTARS revised, improved, and expanded using Fortran IV/77. GSTARS 2.1 is an improved and revised GSTARS 2.0 with graphical user interface. The unique features of all GSTARS models are the conjunctive use of the stream tube concept and of the minimum stream power theory. The application of minimum stream power theory allows the determination of optimum channel geometry with variable channel width and cross-sectional shape. The use of the stream tube concept enables the simulation of river hydraulics using one-dimensional numerical solutions to obtain a semi-two-dimensional presentation of the hydraulic conditions along and across an alluvial channel. According to the stream tube concept, no water or sediment particles can cross the walls of stream tubes, which is valid for many natural rivers. At and near sharp bends, however, sediment particles may cross the boundaries of stream tubes. GSTARS3, based on FORTRAN 90/95, addresses this phenomenon and further expands the capabilities of GSTARS 2.1 for cohesive and non-cohesive sediment transport in rivers and reservoirs. This paper presents the concepts, methods, and techniques used to develop the GSTARS series of computer models, especially GSTARS3.

关键词： Numerical modeling Sediment transport Backwater computations Stream tubes Stream power minimization

Atmospheric Pollutants in a Commercial Region of Fortaleza, Ceará, Brazil: Integration of Health, Environment and Economy in Urban Planning to Improve Air Quality

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journal of Geoscience and Environment Protection 2024年第5期12卷 92-112页

作者： Mônica Giovana Alves Cardoso Ratts Brenna Kessy Silva Lima Gilvan Ribeiro dos Santos Fladimir de Lima Gondim Rinaldo Santos Araújo Mona Lisa Moura de Oliveira francisco Sales Ávila Cavalcante Daniel Silveira Serra Science and Technology Center State University of Cear&#225 Cear&#225 Brazil Department of Chemistry and Environment Federal Institute of Cear&#225 Cear&#225 Brazil Center of Technological Sciences State University of Cear&#225 Cear&#225 Brazil

The accelerated growth of the vehicular fleet, the modernization of large urban centers, and the few adjustments to the road network in Fortaleza have intensified the problems of traffic and emissions of atmospheric pollutants, highlighting the necessity for strategic urban planning initiatives to address the escalating issues of traffic and pollution. With the objective of analyzing the indices of concentrations of atmospheric pollutants and estimating how these levels can affect human health, this work consists of a study of the analysis of air quality in the intense trade region of Fortaleza. For this, the analysis zone was divided into three perimeters (Major - Medium - Minor), where each perimeter was analyzed at 7 am, 12 noon and 5 pm. Concentrations of the type of O3, particulate matter (PM2.5 and PM10), CO2 and HCHO were collected. Our results demonstrate that most of the analyses are within the limits of current legislation;however, at certain times and perimeters, the analyses of CO2 and HCHO exceeded the established limits. In view of the above, we conclude that public policies to control air quality are necessary to reduce the damage to human health and the environment caused by pollutants.

关键词： Air Quality Urban Planning Particulate Material Health Impacts

Vector Spaces of Non-measurable Functions

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Acta Mathematica Sinica,English Series 2006年第6期22卷 1805-1808页

作者： francisco j.GARC■A-PACHECO juan B.SEOANE-SEP■LVEDA Department of Mathematics Kent State University Tamarindos 3

We show that there exists an infinite dimensional vector space every non-zero element of which is a non-measurable function. Moreover, this vector space can be chosen to be closed and to have dimensionβ for any cardi... 详细信息

关键词： lineability spaceability non-measurable functions density character

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