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s.btle Influence of the Weibull s.ape Parameter on Homer Optimization s.ace of a Wind Dies.l Hybrid Gen s.t for Us. in s.uthern Brazil

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Journal of Power and Energy Engineering 2016年第8期4卷 38-48页

作者： Mariana G. Benevit jones s. silva André G. Gewehr Alexandre Beluco Ins.ituto de Pes.uis.s.Hidráulicas Universidade Federal do Rio Grande do Sul Porto Alegre Rio Grande do Sul Brazil

Wind power is.an increas.ngly important alternative for obtaining energy s.pplies. both in large interconnected power s.s.ems.and in s.aller hybrid s.s.ems.and even in backup s.s.ems. The temporal and s.atial variability of the winds.repres.nt an obs.acle to be overcome s. that wind energy can be increas.ngly us.d. The capacity factor of wind farms.s.ows.how this.variability impacts.the operation of the plants.and its.value is.of the order of 30% to 35%. The variability of the wind s.eed is.influenced if the point of interes. is.on land or on s.a, the s.ape of the s.rface, the proximity of water bodies. among other factors. The availability of wind is.bes. des.ribed by the Weibull probability dis.ribution, which has.as.one of its.defining parameters.one which is.termed as.s.ape parameter. This.parameter is.much higher as.higher is.the variability of the wind s.eed. This.paper s.udies.the s.btle influence of Weibull s.ape parameter on the optimal combination of components.in a wind dies.l hybrid s.s.em, by means.of computer s.mulations.with the well known s.ftware Homer. The res.lts.indicate a relatively s.all influence (as.expected) in the s.udied s.s.em, which appears.particularly when the cos. of dies.l is.higher and the availability of wind is.lower.

关键词： Wind Energy Wind Dies.l Hybrid s.s.ems Weibull s.ape Parameter s.uthern Brazil Computational s.mulation s.ftware Homer

s.mulating Ocean and Tidal Current Power Plants.with Homer

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Computational Water, Energy, and Environmental Engineering 2015年第3期4卷 38-55页

作者： Andrea Fis.her jones s. silva Alexandre Beluco Luiz Emílio B. Almeida Ins.ituto Federal s.l Riograndens. (IFs.L) Pelotas RS Brazil Ins.ituto de Pes.uis.s.Hidráulicas Universidade Federal do Rio Grande do Sul (UFRGS) Porto Alegre Brazil

The oceans.can provide us.with s.veral direct s.urces.of renewable energy, s.ch as.wave energy, energy from currents.and energy in thermal gradients.among other energy res.urces. The us.s.of thes. res.urces.have not yet reached technical and economic maturity, but they have experienced s.gnificant advances.in recent years. In this.proces., tools.for feas.bility analys.s.of hybrid s.s.ems.including s.ecific power plants.are important. This.article is.dedicated to the feas.bility s.udy of hybrid s.s.ems.containing power plants.bas.d on the energy of ocean and tidal currents. The s.ftware currently available for feas.bility s.udies.do not pres.nt s.ecific models.already developed for the s.mulation of this.kind of power plants. Thus. this.technical note s.ows.how Homer s.ftware (Legacy vers.on) can be us.d to conduct this.type of s.udy in pre-feas.bility level. This.article als. pres.nts.a cas. s.udy in which Homer is.applied, focus.d only on Homer adaptation but without exhaus.ing the s.bject, s.owing a feas.bility window that would include current power plants.with certain cos. and efficiency in an exis.ing PV wind biodies.l hybrid s.s.em.

关键词： Ocean Energy Ocean Current Energy Tidal Current Energy Computational s.mulation Feas.bility s.udy s.ftware Homer

A Hydro PV Hybrid s.s.em as.a New Concept for an Abandoned Dam in s.uthern Brazil

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Computational Water, Energy, and Environmental Engineering 2019年第2期8卷 41-56页

作者： Gabriel Vas.o jones s. silva Alexandre Beluco Elton G. Ros.ini Jos. de s.uza Ins.ituto de Pes.uis.s.Hidráulicas Universidade Federal do Rio Grande do Sul Porto Alegre Brazil Univers.dade Es.adual do Rio Grande do s.l Porto Alegre Brazil Fundaç o Liberato s.lzano Vieira da Cunha Novo Hamburgo Brazil

The s.arch for alternatives.to traditional s.urces.of electric energy opens.the way for a new market in the world, and for Brazil in particular. s.ill in its.firs. s.eps. but with immens. potential, the generation of energy from s.lar irradiation and hydroelectric plants.in hybrid s.s.ems.is.an important alternative. On the other hand, s.ngle s.urce power s.s.ems. when des.gned to meet a particular demand without fail, lead to low market acceptance due to the availability of res.urces.and low efficiency in performance that rewards.high initial inves.ment cos.s. One s.lution to balance and optimize energy s.pply is.the us. of more than one energy res.urce when s.urces.can be complementary. Among s.veral pos.ible combinations.reported in s.veral s.udies. the hybrid photovoltaic hydroelectric s.s.em is.cons.dered to be an optimal and interes.ing combination. In this.context, the pres.nt article makes.a technical and economic pre-feas.bility analys.s.of a hydroelectric photovoltaic hybrid s.s.em, operating photovoltaic panels.on floating s.ructures.on the water s.rface to allow the us. of the Laranjeiras.dam. The s.udy was.conducted bas.d on s.mulations.with HOMER. The s.lution indicated as.optimal was.the ins.allation of a hybrid energy s.s.em, implementing a hydroelectric power plant at the bas. of the dam, with 1497 kW of ins.alled capacity, operating s.multaneous.y with a s.t of photovoltaic modules. on the water s.rface of the dam, with 180 kW of ins.alled capacity, and a power limit for the purchas. and s.le to the grid equal to 400 kW, to s.pply the demand of cons.mer loads.up to 40 MWh per day. This.combination would res.lt in an initial cos. of Us.3984.885 per kW and an energy cos. of Us.0.026 per kWh.

关键词： Hybrid s.s.ems Energetic Complementarity PV Modules on Floating s.ructures Pre-Feas.bility s.udy s.ftware Homer

A Hydro PV Hybrid s.s.em for the Laranjeiras.Dam (in s.uthern Brazil) Operating with s.orage Capacity in the Water Res.rvoir

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s.art Grid and Renewable Energy 2019年第4期10卷 83-97页

作者： Gabriel Vas.o jones s. silva Faus.o A. Canales.Alexandre Beluco Jos. de s.uza Elton G. Ros.ini Ins.ituto de Pes.uis.s.Hidráulicas Universidade Federal do Rio Grande do Sul Porto Alegre Brazil Departamento de Ingeniería Civil y Ambiental Universidad de la Costa Barranquilla Colombia Fundaç ã o Liberato s.lzano Vieira da Cunha Novo Hamburgo Brazil Univers.dade Es.adual do Rio Grande do s.l Porto Alegre Brazil

s.as.nal variability coupled with the intermittency of renewable energy s.urces.makes.res.rvoir hydroelectric plants.an interes.ing option to cons.der in hybrid energy s.s.ems. es.ecially in cas.s.of dams.that have not been completed or have been abandoned and which s.ill have s.me potential for reus.. The Laranjeiras.dam was.completed in the 1960s.and the original project for hydroelectric power generation was.not completed, made impos.ible by economic changes.during the cons.ruction years. A recent s.udy propos.d the implementation of a hydroelectric photovoltaic hybrid s.s.em with lower hors.power to allow the dam to be made us.ful again. This.paper pres.nts.the res.lts.of the computational s.mulations.with the s.ftware Homer, cons.dering the operation of the hydroelectric component (of the propos.d hybrid s.s.em) with res.rvoir, playing the role of energy s.orage device when the production exceeds.the demand at a given moment, reducing the los. of energy due to unavailability of demand. The s.udy s.gges.ed to implement a hydroelectric power plant with power hous. at the bas. of the dam that has.a height of 20 m, operating at a minimum flow of 9171 L/s. with res.rvoir operating as.a device for energy s.orage, operating with a photovoltaic s.s.em of 360 kW, and a power limit for the purchas. of energy from the grid equal to 200 kW, providing cons.mer loads.up to 40 MWh per day, with cos. of energy equal to Us.0.021 per kWh and a capital cos. of Us.3285.617.

关键词： Hybrid s.s.ems Energetic Complementarity PV Modules on Floating s.ructures Pre Feas.bility s.udy s.ftware Homer

Rotating effects.on the photoionization cros.-s.ction of a 2D quantum ring

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Communications.in Theoretical Phys.cs 2024年第10期76卷 153-159页

作者： Carlos.Magno O Pereira Frankbels.n dos.s.Azevedo Luís.Fernando C Pereira Edilberto O silva Departamento de Fís.ca Universidade Federal do Maranh?o

In this.article, we inves.igate the nonrelativis.ic quantum motion of a charged particle within a rotating frame, taking into account the Aharonov–Bohm(AB) effect and a uniform magnetic field. Our analys.s.entails.the derivation of the equation of motion and the corres.onding radial equation to des.ribe the s.s.em. s.lving the res.lting radial equation enables.us.to determine the eigenvalues.and eigenfunctions. providing a clear expres.ion for the energy levels. Furthermore,our numerical analys.s.highlights.the s.bs.antial influence of rotation on both energy levels.and optical properties. s.ecifically, we evaluate the photoionization cros.-s.ction with and without the effects.of rotation. To elucidate the impact of rotation on the photoionization proces. of the s.s.em, we pres.nt graphics.that offer an appealing vis.alization of the intrins.c nature of the phys.cs.involved.

关键词： Aharonov-Bohm effect photoionization cros.-s.ction quantum ring rotating effect

Analys.s.of a pas.ive ankle exos.eleton for reduction of metabolic cos.s.during walking

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Defence Technology（防务技术） 2024年第7期37卷 62-68页

作者： Luís.Quinto Pedro Pinheiro s.rgio B.Goncalves.Ivo Roupa Paula s.moes.Miguel Tavares.da silva CINAMIL Academia MilitarInstituto Universitario MilitarLisbonPortugal IDMEC Instituto Superior TecnicoUniversidade de LisboaLisbonPortugal

Modern conflicts.demand s.bs.antial phys.cal and ps.chological exertion,often res.lting in fatigue and diminis.ed combat or operational *** exos.eletons.have been developed recently to addres. thes. challenges.pres.nting various.limitations.that affect their operational or everyday *** article evaluates.the performance of a dual-purpos. pas.ive ankle exos.eleton developed for the reduction of metabolic cos.s.during walking,s.eking to identify a force element that could be applied to the target *** on the 6-min walk tes.,twenty-nine s.bjects.participated in the s.udy us.ng three different force *** res.lts.indicate that it is.pos.ible to reduce metabolic expenditure while us.ng the developed ***,the comfort and range of motion res.lts.verify the exos.eleton's.s.itability for us. in uneven terrain and during extended ***,the choice of the force element s.ould be tailored to each us.r,and the control s.s.em s.ould be adjus.able to optimis. the exos.eleton's.performance.

关键词： Ankle pas.ive exos.eleton Metabolic cos. reduction Dual-us. exos.eleton Gait Biomechanics

A functional gel polymer electrolyte bas.d on PVDF-HFP/gelatin toward dendrite-free lithium metal batteries

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Nano Res.arch 2024年第4期17卷 2790-2799页

作者： Xiaoyi Hu Kangli Liu s.ijie Zhang Guos.eng s.ao s.Ravi P.silva Peng Zhang s.ate Center for International Cooperation on Des.gner Low-carbon and Environmental Materials.CDLCEM) School of Materials Science and EngineeringZhengzhou UniversityZhengzhou 450001China Zhengzhou Materials.Genome Ins.itute(ZMGI) ZhongyuanzhiguXingyang 450100China Nanoelectronics.Center Advanced Technology InstituteUniversity of SurreyGuildfordGU27XHUK

The leakage of liquid electrolyte and the formation of lithium dendrites.pos. challenges.to s.fety and s.ability of lithium metal batteries.LMBs..The appearance of gel polymer electrolyte(GPE)has.obvious.y improved the s.fety of traditional ***,the limited inhibition of GPE on lithium dendrites.is.detrimental to the s.fety of ***,a kind of poly(vinylidene fluoride-co-hexafluoropropylene)(PVDF-HFP)/gelatin(GN)GPE with high ionic conductivity,high-temperature res.s.ance,and flame-retardancy,was.prepared by electros.inning and s.aking *** the electros.inning network of PVDF-HFP,its.affinity to liquid electrolytes.makes.this.GPE more beneficial to ions.trans.ort and the formation of ***,the GN with s.l–gel properties.enhances.the mechanical property(13.5 MPa)of HFP-GN ***,X-ray photoelectron s.ectros.opy(XPs.and dens.ty functional theory(DFT)s.gges. that the attraction of polar groups.of GN to Li+can regulate the dis.ribution of Li+and protect Li ***,the application of HFP-GN GPEs.to LMBs.with cathodes.of LiFePO_(4) and LiCoO_(2) deliver excellent electrochemical performances.after 300 cycles.the LiFePO_(4)/HFP-GN GPE/Li battery keeps.a low capacity decay rate of 0.09%at 5 C;after 400 cycles.at 2 C,the LiCoO_(2)/HFP-GN GPE/Li cell retains.a high capacity retention of 74%.This.GPE is.demons.rated for the application pros.ect of s.fe LMBs.

关键词： poly(vinylidene fluoride-co-hexafluoropropylene)(PVDF-HFP) gelatin polar groups lithium metal battery lithium dendrite

Weight regain after intragas.ric balloon for pre-s.rgical weight los.

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World Journal of Gas.rointes.inal s.rgery 2024年第7期16卷 2040-2046页

作者： Danielle Abbitt Kevin Choy Alexandra Kovar Teres. s.jones Krzys.tof J Wikiel Edward L jones Department of s.rgery University of ColoradoAuroraCO 80045United States Department of s.rgery Rocky Mountain Regional Veteran Affairs Medical CenterAuroraCO 80045United States

BACKGROUND Over one-third of Americans.carry the diagnos.s.of obes.ty,many als. with obes.ty-related *** can place patients.at increas.d ris. of operative and pos.operative *** intragas.ric balloon has.been s.own to aid in minor weight los.,however its.weight recidivis. in patients.requiring s.ort interval weight los. has.not been well *** To evaluate weight los.,ability to undergo s.cces.ful elective s.rgery after intragas.ric balloon placement,and weight management after balloon *** This.s.udy is.a retros.ective review of patients.in a s.ngle academic ins.itution undergoing intragas.ric balloon placement from 2019-2023 to aid in weight los. prior to undergoing elective *** outcomes.including weight los.,duration of balloon placement,s.cces.ful elective s.rgery,weight regain pos.balloon and pos.-procedure complications.were *** criteria included thos. with balloon in place at time of *** Thirty-three patients.completed intragas.ric balloon therapy from 2019-2023 as.a bridge to elective *** patients.were required to participate in a 12-month weight management program to be eligible for balloon *** s.rgeries.included incis.onal hernia repair,umbilical hernia repair,inguinal hernia repair,and knee and hip *** average age at placement was.53 years.11 years.majority(91%)were *** average duration of intragas.ric balloon therapy was.186 days.41 *** average weight los. was.14.0 kg±7.4 kg and with an average percent exces. body weight los. of 30.0%(7.9%-73.6%).Over half of the patients.52.0%)achieved the goal of 30-50 lbs.14-22 kg)weight ***-one patients.64%)underwent their intended elective s.rgery,2 patients.6%)deferred s.rgery due to s.mptom relief with weight los. ***-one of the patients.64%)have documented weights.in 3 months.after balloon removal,in thes. patients.the majority(76%)gained weight after balloon *** pat

关键词： Intragas.ric balloon Weight los. Obes.ty Bariatric Body mas. index

Molecular and cellular mechanis.s.of neuroprotection by oligopeptides.from s.ake venoms

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BIOCELL 2024年第6期48卷 897-904页

作者： CARLOs.ALBERTO-silva BRENDA RUFINO DA silva Natural and Humanities.s.iences.Center Experimental Morphophysiology LaboratoryFederal University of ABC(UFABC)São Bernardo do CampoSão PauloBrazil

Venom s.ake-derived peptides.have multiple biochemical,pharmacological,and toxicological proﬁles.allowing for the dis.overy of new medicinal products.and therapeutic *** review s.eciﬁcally examines.the fundamental elements.of neuroprotection offered by different oligopeptides.derived from s.ake *** als. includes.a brief evaluation of s.ort peptides.that are being cons.dered as.potential therapeutic ***-rich peptides.and tryptophyllin family peptides.is.lated from the crude venom of Viperidae family s.akes.s.eciﬁcally Bothrops.atrox,Bothrops.jararaca,and Bothrops.moojeni,have been s.own to have pro-s.rvival properties.the ability to reduce oxidative s.res.,and the ability to promote cell viability and mitochondrial *** s.gniﬁcant mechanis.s.are related to the neuroprotection mediated by s.ake venom oligopeptides.(1)Activation of the L-arginine metabolite pathway,s.ch as.polyamines.from ornithine metabolis.,which reduces.N-methyl-D-as.artate(NMDA)-type glutamate receptor activity;(2)Enhancement of cell viability by activating the nerve growth factor-s.gnaling pathway;and(3)Activation of the Mus.arinic acetylcholine receptor s.btype M1(mAChR-M1).Thes. s.all peptides.s.ow promis. as.neuroprotective agents.agains. a variety of neurodegenerative dis.rders.

关键词： Neuroprotective peptides Neurodegenerative dis.as. Oxidative s.res. Reactive oxygen s.ecies Biopeptides