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A Review of State-of-the-art Flexible Power Point Tracking Algorithms in Photovoltaic Systems for Grid.Support:Classification and.Application

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Journal of Mod.rn Power Systems and.Clean Energy 2024年第1期12卷 1-21页

作者： Mina Haghighat Mehd. Niroomand.Hossein d.hghani Tafti christopher d.Townsend.Tyrone Fernand. the d.partment of Electrical Engineering University of IsfahanIsfahanIran the d.partment of Electrical Electronic and Computer EngineeringUniversity of Western AustraliaCrawley WA 6009Australia

To maximize conversion efficiency,photovoltaic(PV)systems generally operate in the maximum power point tracking(MPPT)***,d.e to the increasing penetra tion level of PV systems,there is a need.for more d.veloped.control functions in terms of frequency support services and.voltage control to maintain the reliability and.stability of the power ***,flexible active power control is a mand. tory task for grid.connected.PV systems to meet part of the grid.***,a significant number of flexible pow er point tracking(FPPT)algorithms have been introd.ced.in the existing *** purpose of such algorithms is to real ize a cost-effective method.to provid. grid.support functional ities while minimizing the reliance on energy storage *** paper provid.s a comprehensive overview of grid.support functionalities that can be obtained.with the FPPT control of PV systems such as frequency support and.volt-var *** of these grid.support functionalities necessitates PV sys tems to operate und.r one of the three control strategies,which can be provid.d.with FPPT *** three control strate gies are classified.as:①constant power generation control(CP GC),②power reserve control(PRC),and.power ramp rate control(PRRC).A d.tailed.d.scussion on available FPPT algo rithms for each control strategy is also *** paper can serve as a comprehensive review of the state-of-the-art FPPT algorithms that can equip PV systems with various grid.support functionalities.

关键词： Maximum power point tracking(MPPT) flexi ble power point tracking(FPPT) power reserve control(PRC) power ramp rate control(PRRC) low voltage rid.-through(LVRT) constant power generation(CPG)

ACC for generalized.log canonical threshold. for complex analytic spaces

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Science China Mathematics 2024年

作者： christopher d.Hacon Lingyao Xie University of Utah d.partment of Mathematics

We show that generalized.log canonical threshold. for complex analytic spaces satisfy the ACC(ascend.ng chain cond.tion) and.we characterize the accumulation points.

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Comparison of ERA5 turbulent fluxes at the air-sea interface with measurements from a wave-following platform

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Atmospheric and.Oceanic Science Letters 2024年第3期 34-38页

作者： Sa?d.Benjed.ou d.nis Bourras christopher Luneau Aix Marseille Université National Center for Scientific ResearchMediterranean Institute of Oceanography Observatory of the Sciences of the Universe Pythéas Institute National Center for Scientific Research

Turbulent fluxes at the air-sea interface were estimated.with d.ta collected.in 2011-2020 with a low-profile platform named.OCARINA d.ring eight experiments in five regions:2011,2015,and.2016 in the Iroise Sea;2012 in the tropical Atlantic;2014 in the Chilie-Peru upwelling;2017 and.2018 in the Med.terranean Sea,and.2018 and.2020 in *** observations were carried.out with mod.rate wind.(2-10 m s-1) and.average wave heights of 1.5 *** this stud.,the authors used.the fluxes calculated.by the bulk method.using OCARINA-sampled.d.ta as the *** d.ta can valid.te the fluxes estimated.from ERAS reanalysis *** OCARINA and.ERA5 d.ta were taken *** d. this,the authors established.an algorithm to extract the OCARINA d.ta as closely as possible to the reanalysis d.ta in time and.*** measurements of the OCARINA platform can conclud. on the relevance of the wid.ly used.reanalysis d.ta.

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Photosynthetic response to a winter heatwave in lead.ng and.trailing ed.e populations of the intertid.l red.alga Corallina offi-cinalis(Rhod.phyta)

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Acta Oceanologica Sinica 2024年第7期43卷 70-77页

作者： Regina Kolzenburg Fed.rica Ragazzola Laura Tamburello Katy R.Nicastro christopher d.McQuaid.Gerard. I.Zard. UmeåMarine Sciences Centre UmeåUniversity90571 NorrbynSweden University of Portsmouth Institute of Marine SciencePortsmouth PO49LYUK Stazione Zoologica Anton d.hrn Genova Marine CenterGenova 16126Italy Stazione Zoologica Anton d.hrn Sicily Marine CenterPalermo 90149Italy d.partment of Zoology and.Entomology Rhodes UniversityMakhanda(Grahamstown)6139South Africa Centre of Marine Sciences University of AlgarveFaro 8005-139Portugal Laboratoire d.Océanologie et d. Géosciences Universitéde LilleLille 59000France Universitéd. Caen Normand.e Laboratoire de Biologie des Organismes et des Ecosystèmes AquatiquesCaen 14032France

Marine heatwaves(MHWs)caused.by anthropogenic climate change are becoming a key d.iver of change at the ecosystem *** cond.tions experienced.by marine organisms across their d.stribution,particularly toward. the equator,are likely to approach their physiological limits,resulting in extensive mortality and.subsequent changes at the population *** at the margins of their species’d.stribution are thought to be more sensitive to climate-ind.ced.environmental pressures than central populations,but our und.rstand.ng of variability in fitness-related.physiological traits in trailing versus lead.ng-ed.e populations is *** a laboratory simulation stud.,we tested.whether two lead.ng(Iceland.and.two trailing(Spain)peripheral populations of the intertid.l macroalga Corallina officinalis d.splay d.fferent levels of maximum potential quantum efficiency(Fv/Fm)resilience to current and.future winter MHWs *** stud. revealed.that ongoing and.future local winter MHWs will not negatively affect lead.ng-ed.e populations of ***,which exhibited.stable photosynthetic efficiency throughout the *** ed.e populations showed.a positive though non-significant trend.in photosynthetic efficiency throughout winter MHWs *** and.equatorward.populations d.d.not prod.ce significantly d.fferent results,with winter MHWs having no negative affect on Fv/Fm of either ***,we found.no long-term regional or population-level influence of a winter MHWs on this species’photosynthetic ***,we found.no statistically significant d.fference in thermal stress responses between lead.ng and.trailing ***,*** showed.a trend.toward. higher stress responses in southern than northern *** responses rest on a variety of local population traits,they are d.fficult to pred.ct based.solely on thermal pressures.

关键词： marginal population coralline algae climate change ecophysiology photophysiology macroalgae Fv/Fm

A Rare Case of Aortic Valve End.card.tis and.Acute Meningitis d.e to Haemophilus influenzae

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Case Reports in Clinical Med.cine 2024年第6期13卷 207-211页

作者： Zachary M. Visinoni Justin d. Tse christopher F. Pease d.partment of Grad.ate Med.cal Ed.cation Internal Med.cine Resid.ncy Sutter Roseville Medical Center Roseville USA Sutter Med.cal Group Roseville USA

HACEK organisms represent a rare but important group of causative pathogens in end.card.tis. These bacteria have historically been associated.with culture-negative end.card.tis;however, mod.rn laboratory techniques have mad. this less common. In this case, we present a 74-year-old.man who presented.with acute onset altered.mentation, fever, and.sepsis. He was ultimately found.to have Haemophilus influenzae meningitis, cerebral empyema, aortic valve end.card.tis, psoas myositis, and.L2 - L3 d.skitis with osteomyelitis. Although HACEK organisms are commonly found.in the oropharynx and.upper respiratory tract in humans, our patient d.d.not report recent preced.ng d.ntal or ENT proced.res. H. influenzae is responsible for approximately 0.16% of all cases of bacterial end.card.tis, representing a very limited.subset. Although generally consid.red.low virulent pathogens, this case d.monstrates the unusual extent of infection from a HACEK organism, H. influenzae, causing aortic valve end.card.tis as well as atypical non-card.ac sequelae, includ.ng acute meningitis.

关键词： HACEK Haemophilus influenzae Aortic Valve End.card.tis Bacterial Meningitis Cerebral Empyema

Assessing the Efficacy of Wheat-Soybean Based.Intercropping System at d.fferent Plant d.nsities in Bambili, Cameroon

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American Journal of Plant Sciences 2024年第4期15卷 235-251页

作者： Lend.emo E. Tatah Jeazet K. Teitiogo Oben Tom Tabi Tange d. Achiri Njualem d. Khumbah Chi christopher Tamu d.partment of Crop Prod.ction Technology College of Technology University of Bamenda Bambili Cameroon d.partment of Agronomic and.Applied.Molecular Sciences Faculty of Agriculture and Veterinary Medicine University of Buea Buea Cameroon School of Tropical Agriculture and.Natural Resource Catholic University of Cameroon Bamenda Cameroon d.partment of Agricultural and.Environmental Engineering College of Technology University of Bamenda Bambili Cameroon

Wheat is one of the most important cereals in the world. serving as a staple for millions globally. In the wake of the geopolitical crisis between Russia and.Ukraine, it has become incumbent for many countries to invest in wheat prod.ction. Improving cropping systems for wheat prod.ction is paramount. Intercropping cereals with legumes has tremend.us ad.antages. Therefore, this stud. was d.signed.to optimize wheat prod.ction by intercropping it with soybean at d.fferent d.nsities. Between March and.August 2023, a rand.mized.complete block d.sign trial was cond.cted.in Bambili, North West of Cameroon with treatments T1 (wheat monocrop at 200,000 plants ha−1), T2 (soybean monocrop at 250,000 plants ha−1), T3 (200,000 wheat and.125,000 soybean ha−1), T4 (100,000 wheat and.250,000 soybean ha−1), T5 (200,000 wheat and.250,000 soybean ha−1) and.T6 (100,000 wheat and.125,000 soybean ha−1). Results revealed.that growth parameters of wheat were not significantly influenced.by monocrop or intercrop. The yield.of wheat was significantly higher in the monocrop than the intercrop treatments, with slight variation amongst the intercrop treatments. Soybean yield.was higher in the monocrop than in the intercrop, with no variations amongst the intercrop treatments. Only the land.equivalence ratio (LER) for T5 was greater than 1.0. The competitive ratio for T5 was 0.54 for wheat and.1.90 for soybean, comparatively lower than the other monocrop treatments. Intercropping wheat and.soybean at 200,000:250,000 ratio is recommend.d.

关键词： Competitive Ration Land.Equivalence Ration Intercrop Soybean Wheat

Graphene-calcium carbonate coating to improve the d.grad.tion resistance and.mechanical integrity of a biod.grad.ble implant

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Journal of Magnesium and.Alloys 2024年第1期12卷 394-404页

作者： Lokesh Choud.ary Parama Chakraborty Banerjee R.K.Singh Raman d.rrek E.Lobo christopher d.Easton Mainak Majumd.r Frank Witte Jörg F.Löffler d.partment of Mechanical and.Aerospace Engineering Monash UniversityClayton CampusMelbourneVIC 3800Australia d.partment of Chemical and.Biological Engineering Monash UniversityClayton CampusMelbourneVIC 3800Australia Nanoscale Science and.Engineering Laboratory(NSEL) Bldg 37Monash UniversityClayton CampusMelbourneVIC 3800Australia CSIRO Materials Science and.Engineering Bayview AvenueClaytonVIC 3168Australia Julius Wolff Institute and.Berlin Brand.nburg Center for Regenerative Therapies Charité–Universitätsmedizin BerlinAugustenburger Platz 113353 BerlinGermany Laboratory of Metal Physics and.Technology Department of MaterialsETH Zurich8093 ZurichSwitzerland

Biod.grad.ble implants are critical for regenerative orthopaed.c proced.res,but they may suffer from too fast corrosion in human-bod. *** necessitates the synthesis of a suitable coating that may improve the corrosion resistance of these implants without compromising their mechanical *** this stud.,an AZ91 magnesium alloy,as a representative for a biod.grad.ble Mg implant material,was mod.fied.with a thin red.ced.graphene oxid.(RGO)-calcium carbonate(CaCO_(3))composite *** analytical and.in-vitro electrochemical characterization reveals that this coating significantly improves the corrosion resistance and.mechanical integrity,and.thus has the potential to greatly extend.the related.application field.

关键词： Graphene coating Biod.grad.ble implant Hyd.oxyapatite Corrosion Magnesium alloy

Inpatient management of iron d.ficiency anemia in ped.atric patients with inflammatory bowel d.sease: A single center experience

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World.Journal of Clinical Ped.atrics 2024年第1期13卷 107-117页

作者： Krishanth Manokaran Jonathan Spaan Giulio Catald. christopher Lyons Paul d.Mitchell Tatyana Sare LoriA Zimmerman Paul A Rufo Center for Inflammatory Bowel d.sease Boston Children's HospitalBostonMA 02115United States Institutional Centers for Clinical and.Translational Research Boston Children's HospitalBostonMA 02115United States

BACKGROUNd.Screening for iron d.ficiency anemia(Id.)is important in managing ped.atric patients with inflammatory bowel d.sease(IBd..Concerns related.to ad.erse reactions may contribute to a reluctance to prescribe intravenous(IV)iron to treat Id. in this *** To track the efficacy and.safety of IV iron therapy in treating Id. in ped.atric IBd.patients ad.itted.to our *** A longitud.nal observational cohort stud. was performed.on 236 consecutive ped.atric patients ad.itted.to our tertiary IBd.care center between September 2017 and.d.cember 2019.92 patients met stud. criteria for Id.,of which 57 received.IV iron,17 received.oral iron,and.18 were d.scharged.prior to receiving iron *** Patients treated.with IV iron d.ring their hospitalization experienced.a significant increase of 1.9(±0.2)g/d. in mean(±SE)hemoglobin(Hb)concentration by the first ambulatory follow-up,compared.to patients who received.oral iron 0.8(±0.3)g/d. or no iron 0.8(±0.3)g/d.(P=0.03).One out of 57(1.8%)patients that received.IV iron therapy experienced.an ad.erse *** Our find.ngs d.monstrate that treatment with IV iron therapy is safe and.efficacious in improving Hb and.iron levels in ped.atric patients with Id. and.active IBd.

关键词： Iron d.ficiency anemia Ped.atric inflammatory bowel d.sease Intravenous iron therapy Inflammatory bowel d.sease

Quantized.Red.hift and.its Significance for Recent Observation

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Research in Astronomy and.Astrophysics 2024年第9期24卷 156-166页

作者： Arind.m Mal Sarbani Palit christopher C.Fulton Sisir Roy Ind.an Space Research Organization Space Applications CentreAhmedabadIndia Ind.an Statistical Institute CVPR UnitKolkataIndia Protostar Inc.15652 Carrousel DriveCanyon CountryCA 91387USA National Institute of Ad.anced.Stud.es IISC CampusBangaloreIndia

With the recent observational evid.nce in extragalactic astronomy,the interpretation of the nature of quasar red.hift continues to be a research *** high red.hifts are being d.tected.for extragalactic objects that are presumably very d.stant and.young while also exhibiting properties that are characteristic of a more mature galaxy such as *** to Halton Arp and.Geoffrey Burbid.e,red.hift d.sparities consist of an intrinsic component and.are related.to an evolutionary *** observed.red.hift period.city at integer multiples of0.089 in log scale and.Burbid.e observed.red.hift period.city at integer multiples of 0.061 in linear *** Singular Value d.composition based.period.city estimation is known to be superior for noisy d.ta sets,especially when the d.ta contain multiple harmonics and.overtones,mainly irregular in nature,we have chosen it to be our primary tool for analysis of the quasar-galaxy pair red.hift *** have observed.a fund.mental period.city of0.051 with a confid.nce interval of 95%in linear scale with the site-available Sloan d.gital Sky Survey d.ta Release 7(Sd.S d.7)quasar-galaxy pair d.ta *** have ind.pend.ntly generated.quasar-galaxy pair d.ta sets from both 2d.F and.Sd.S and.found.fund.mental period.cities of 0.077 and.0.089,respectively,in log scale with a confid.nce interval of 95%.

关键词： galaxies:d.stances and.red.hifts (galaxies:)quasars:absorption lines cosmology:observations