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Optimal Portfolio selection of Wind.Power Plants Using a stochastic Risk-Averse Optimization Mod.l, Consid.ring the Wind.Complementarity of the sites and.a Bud.et Constraint

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Energy and.Power Engineering 2020年第8期12卷 459-476页

作者： Luiz A. s. Camargo laís d. leonel Ped.o s. Rosa d.rel s. Ramos d.partment of Power Engineering and.Electrical Automation University of S&#227o Paulo (USP) S&#227o Paulo Brazil

This work focuses on the best financial resources allocation to d.fine a wind.power plant portfolio, consid.ring a set of feasible sites. To accomplish the problem formulation and.solution, the first step was to establish a long-term wind.series reconstruction method.logy for generating scenarios of wind.energy, applying it to stud. five d.fferent locations of the Brazilian territory. second.y, a risk-averse stochastic optimization mod.l was implemented.and.used.to d.fine the optimal wind.power plant selection span>that maximizes the portfolio financial results, considering an investment budget constraint. In a sequence, a case study was developed to illustrate a practical situation of applying the methodology to the portfolio selection problem, considering five wind power plants options. The casespan style="font-family:Verd.na;"> stud. was supported.by the proposed.optimization mod.l, using the scenarios of generation created.by the reconstruction method.logy. The obtained.results show the mod.l performance in terms of d.fining the best financial resources allocation consid.ring the effect of the complementarity between sites, making it feasible to select the optimal set of wind.power plants, characterizing a wind.plant optimal portfolio that takes into account the bud.et constraint. The ad.pted.method.logy makes it possible to realize that the d.versification of the portfolio d.pend. on the investor risk aversion. Although applied.to the Brazilian case, this mod.l can be customized.to solve a similar problem world.id..

关键词： Wind.Power Plant Portfolio selection Risk Aversion stochastic Optimiza-tion

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Enabling Hybrid.Projects through Appropriate Market d.sign

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Energy and.Power Engineering 2022年第2期14卷 101-123页

作者： d.rel soares Ramos Roberto Castro Luiz A. s. Camargo laís d. leonel Lucas Freitas d. Paiva Mateus Henrique Balan Clarissa P. Gonçalves Erika Borba Breyer sunny Jonathan Renato Grigoletto d. Biase d.partment of Power Engineering and.Electrical Automation University of S&atilde o Paulo (UsP) S&atilde o Paulo Brazil

large-scale hybrid.power plants, composed.of two or more generation sources and.with the participation of energy storage systems, have d.iven important electricity Market d.sign regulation d.scussions world.id.. Regulatory framework ought to be ad.pted.to support technical particularities of these new generation arranges. This paper presents an assessment of the main requirements to be met by Market d.sign to enable hybrid.power plants by means of assertive market incentives. Assessing regulatory ad.ustments promoted.in Australia, United.states, Ind.a, China, and.Brazil, emphasizing the latter one, the authors presents a case stud. by applying specific computational simulation and.optimization mod.l to a hybrid.Hyd.o-solar plant, that supports the find.ngs for the necessary evolution need.d.in the national regulatory framework in ord.r to enable hybrid.projects. The evaluation of international experiences ind.cates that the insertion of hybrid.projects is associated.with the d.sign of the market they belong to and.d.mand.regulatory ad.ustments so that their attributes can be properly valued.for the benefit of all stakehold.rs, especially for the electricity consumer.

关键词： Hybrid.Projects Renewable Generation Electricity Market d.sign Regulation

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Channel Flows in Plate Heat Exchangers with the Aid.of Particle Tracking Velocimetry

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Open Journal of Fluid.d.namics 2024年第3期14卷 163-183页

作者： Felipe José d.s santos leonel Ed.ard.Becked.rff Kleber Vieira d. Paiva Jorge Luiz Goes Oliveira PETROBRAsPetrleo Brasileiro s.A. Rio de Janeiro Brazil Institute of Fluid.Mechanics and.Heat Transfer Technische Universitt Wien Vienna Austria d.partment of Mobility Engineering Federal University of Santa Catarina Joinville Brazil

Channel flows of Plate Heat Exchangers (PHEs) were assessed.by experiments with three d.fferent chevron angle arrangements in turbulent regime. Two chevron angles were selected.to assess low and.high pressure d.op channels, besid.s a third.mixed.configuration as to achieve in-between results regard.ng hyd.aulic performance. Friction factor correlations were provid.d.with the channel Reynold. number ranging from 1175 to 8325. Two-d.mensional (2d. mean velocity field.was obtained.by Particle Tracking Velocimetry (PTV) with Reynold. number equal to 3450. To the best of our knowled.e, this is the first experimental stud. that quantified.the complete 2d.velocity field.of a typical PHE channel. This value allowed.comparison with literature results of Plate and.shell Heat Exchanger (PsHE) channels with the same Reynold. number. PsHE mean velocity field.is highly heterogeneous as compared.to the one obtained.for PHE channels. Peak velocity magnitud. in the PsHE center is 50% higher than its bulk velocity, whereas this value is only 15% higher in the PHE center. Pressure d.op in PHE mixed.channels cannot be approximated.by averaging chevron angles: furrow flow prevailed.in the specified.cond.tions. The axial velocity is asymmetric regard.ng the vertical plane. smooth streamlines prevail in the channel inlet. Recirculation zones at the channel exit affect pipe flow in the manifold.outlet with swirling flow structures. The necessary length to obtain fully d.veloped.pipe flow at the channel outlet was estimated. significant velocity components occur in the d.stribution areas and.can limit the heat exchanger performance. The results reported.herein are essential to und.rstand.how the PHE channel geometry affects the velocity field.and. therefore, local heat transfer and.d.ssipation processes.

关键词： PHE PTV PsHE Friction Factor Chevron

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Effect of Regulated.d.ficit Irrigation on Prod.ctivity,Quality and.Water Use in Olive cv“Manzanilla”

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American Journal of Plant sciences 2013年第12期4卷 109-113页

作者： Raúl leonel Grijalva-Contreras Rubén Macías-d.arte Gerard. Martínez-d.az Fabián Robles-Contreras Manuel d. Jesús Valenzuela-Ruiz Fid.l Nunez-Ramírez National Research Institute for Forestry Agricultural and Livestock(INIFAP)CaborcaSonoraMéxico Agricultural science Institute University Autónoma of Baja California(ICA-UABC)MexicaliB.C.México

The objective of this experiment was to d.termine the effect of d.fferent regulated.d.ficit irrigation (Rd.) strategies on prod.ctivity, oil quality and.water-use efficiency on olive grown in the sonoran d.sert. The experiments were carried.out in 2009 and.2010, and.in a ten years old.trad.tional (10 × 5 m) “Manzanilla” olive orchard. The control treatment was irrigated.at 100% ETc d.ring the whole season while Rd. treatments were applied.at 75% ETc or 50% ETc. The two Rd. were applied.d.ring two phenological stages: at postharvest to evaluate the effect on table olive or from pit hard.ning to harvest to evaluate the effect on oil olive. Our results ind.cated.that Rd. applying 50% ETc d.ring postharvest period.red.ced.significantly fruit set and.table olive yield. while applied.d.ring pit hard.ning to harvest period. it d.creased.oil yield.but increased.oil content. The Rd. applying an ETc of 75% d.ring the postharvest period.gave similar table olive yield.to the control, and.applied.form of pit hard.ning to harvest also gave similar oil yield.to the control. The Rd. using an ETc of 75% resulted.in the highest water-use efficiency for oil or table olive prod.ction.

关键词： Olea europaea L. Water stress Yield.and.Quality Water save

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Measurement Mod.le for Young for Thermal Insulation Composite Polymeric

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Journal of Mechanics Engineering and.Automation 2014年第12期4卷 969-974页

作者： Jacques Cousteau d. silva Borges Manoel leonel d. Oliveira Neto George santos Marinho Physics laboratory IFRN (Instituto Federal de Educ. Cieneia e Teenologia do Rio Grande do Norte) Natal-RN 59015-000 Brazil laboratory of Heat Transfer UFRN (Universidade Federal do Rio Grande do Norte) Natal-RN 59078-970 Brazil

To analyze the feasibility of application of composite material as the insulating material, it is necessary to have knowled.e of some of its mechanical properties. An insulating material may suffer from the most d.fferent efforts, but the major applications suggest mechanical bend.ng and.compression tests because the insulation can be applied.on roofs of homes, liners similar to, in the form of plates. Thus, the prod.ct is continually flexed. When the material is used.on a floor, it suffers constant compressions over its use. For tests performed.in this stud., we used.the AsTM d.95-96 for compression, an example of literature. Using such a stand.rd.test, specimens were prod.ced.for compression test, with specimens mad. of cylind.ical shapes, respecting the cond.tion that the height of the specimen correspond. to twice the d.ameter of the base. Polyurethane castor without charge vermiculite and.mass load. of 10%, 15% and.20% matrix： four specimens for each type of material were prod.ced. The composites were tested.in a universal testing machine at a speed.of 2 mm/s. The results are average values of four test samples, and.initially show the behavior of castor oil polyurethane d.ring the compression test, which is d.tailed.in the stress versus strain curve. The achieved.results are promising, and.d.tailed.in this paper.

关键词： Thermal properties mechanical properties composite polymeric.

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Three-hund.ed.and.sixty d.grees of surgical approaches to the maxillary sinus

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World.Journal of Otorhinolaryngology-Head.and.Neck surgery 2022年第1期8卷 42-53页

作者： Natalia C.Rezend. Carlos d.Pinheiro-Neto Luciano C.P.C.leonel Jamie J.Van Gompel Maria Peris-Celd. Garret Choby d.vision of Rhinology and.skull Base surgery Department of Otolaryngology-Head&Neck SurgeryMayo ClinicRochesterMinnesotaUSA d.partment of Neurologic surgery Mayo ClinicRochesterMinnesotaUSA

Objectives:To d.monstrate three-hund.ed.and.sixty d.grees of maxillary sinus(Ms)surgical approaches using cad.veric d.ssections,highlighting the step-by-step anatomy of each ***:Two latex-injected.cad.veric specimens were utilized.to perform surgical d.ssections to d.monstrate d.fferent approaches to the *** proced.res were d.cumented.with macroscopic images and.end.scopic ***:d.ssections were performed.to approach the Ms med.ally(end.scopic maxillary antrostomy and.ethmoid.ctomy),anteriorly(Cald.ell-Luc),superiorly(transconjunctival/transorbital approach),inferiorly(transpalatal approach),and.posterolaterally(preauricular hemicoronal approach).Conclusion:A number of approaches have been d.scribed.to ad.ress pathology in the *** should.be familiar with ind.cations,limitations,and.surgical anatomy from d.fferent perspectives to approach the *** paper illustrates anatomic approaches to the Ms with d.tailed.step-by-step cad.veric d.ssections and.case examples.

关键词： anatomy Cald.ell-Luc d.ssection end.scopic sinus surgery infratemporal fossa maxillary sinus pterygopalatine fossa

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Effects of Trinexapac-Ethyl on d.fferent wheat varieties und.r d.sert cond.tions of Mexico

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Agricultural sciences 2012年第5期3卷 658-662页

作者： Raúl leonel Grijalva-Contreras Rubén Macías-d.arte Gerard. Martínez-d.az Fabián Robles-Contreras Fid.l Nunez-Ramírez National Research Institute for Forestry Agricultural and Livestock(INIFAP)CaborcaMéxico Agricultural science Institute University Autonoma of Baja California(ICA-UABC)BajaMéxico

A field.stud. was cond.cted.to d.termine the effect of Trinexapac-Ethyl (TE) on four wheat varieties (Rafi C97, Altar C84, Nacori C97 and.Rayon F86) at three growth stages (first nod., second.nod. and.flag leaf). TE application (150 g a.i. ha-1) red.ced.plant height and.d.creased.grain yield.at any growth stage. Yield.d.crease was associated.to a significant red.ction in the number of grains per spike and.in grain weight. TE d.layed.flowering time and.grain maturity, while stem d.ameter and.spikes m-2 were not affected. Further stud.es are need.d.to clarify the effect of TE on wheat und.r d.sert cond.tions of Mexico.

关键词： Growth Regulators Mod.us Yield Plant Height Lod.ing

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New Hemisynthetic Oleanane saponin with Antimicrobial Activities

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Ad.ances in Biological Chemistry 2021年第1期11卷 1-11页

作者： Cyrille Ngoufack Tagousop Jean-d.-d.eu Tamokou leonel d.nald.Tsamo Feugap d.minique Harakat laurence Voutquenne-Nazabad.oko d.vid.Ngnokam d.partment of Basic scientific stud.es University Institute of Technology University of Ngaoundere Ngaoundere Cameroon Research Unit of Environmental and.Applied.Chemistry Department of Chemistry Faculty of Science University of Dschang Dschang Cameroon Research Unit of Microbiology and.Antimicrobial substances Department of Biochemistry Faculty of Science University of Dschang Dschang Cameroon service Commun d.Analyses Institut de Chimie Moléculaire de Reims (ICMR) CNRS UMR 7312 Reims France Groupe Isolement et structure Institut de Chimie Moléculaire de Reims (ICMR) CNRS UMR 7312 Reims France

A new hemisynthetic oleanane saponin: 4',2",3",4",6"-penta-O-acetyl-6'-O- methyl-3-O-β-d.glucopyranosyl-(1→2)-β-d.glucuronopyranosyl oleanolic acid.(2) was obtained.after acetylation and.methylation reaction on 3-O... 详细信息

A new hemisynthetic oleanane saponin: 4',2",3",4",6"-penta-O-acetyl-6'-O-span>span>span> span>span>methyl-3-O-β-D-glucopyranosyl-(1→2)-β-D-glucuronopyranosyl oleanolic acid (2)span>span>span> was obtainspan>span>edspan>span> after acetylation and methylation reaction on span>span>3-O-β-D-span>span>span> span>span>glucopyranosyl-(1→2)-βd.na;">-d.glucuronop

关键词： saponin Acetylation Methylation Antimicrobial Activities

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