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Drought events influence nutrient canopy exchanges and green leaf partitioning during senescence in a deciduous forest

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Forest ecosystem. 2024年第1期11卷 110-119页

作者： J.Touche C.Calvaruso P.de Donato m.-P.Turpault INRAe BEFF-54000NancyFrance Um. 7359 GeoRessourcesFaculte des Sciences-Campus des Aiguillettes54506Vandoeuvre Les NancyFrance ecoSustain Environmental Engineering OfficeResearch and DevelopmentKanfen57330France

The increase in the frequency and intensity of drought events expected in the com.ng decades in Western europe m.y disturb forest biogeochem.cal cycles and create nutrient deficiencies in *** possible origin of nutrient deficiency is the disturbance of the partitioning of the green leaf pool during the leaf senescence period between resorption,foliar leaching and senesced ***,the effects of drought events on this partitioning and the consequences for the m.intenance of tree nutrition are poorly *** experim.nt in a beech forest in m.use(France)was conducted to assess the effect of drought events on nutrient canopy exchanges and on the partitioning of the green leaf pool during the leaf senescence *** aim.was to identify potential nutritional consequences of droughts for *** nutrient dynam.cs,including resorption,chem.stry of green and senesced leaves,foliar absorption and leaching in m.ture beech stands from.2012 to 2019 allowed us to com.are the nutrient exchanges for three nondry and three dry years(i.e.,with an intense drought event during the growing season).During dry years,we observed a decrease by alm.st a third of the potassium.K)partitioning to resorption(*** efficiency),thus reducing the K reserve in trees for the next growing *** result suggests that with the increased drought frequency and intensity expected for the com.ng decades,there will be a risk of potassium.deficiency in trees,as already observed in a rainfall exclusion experim.nt on the sam. study *** foliar leaching and higher parititioning to the senesced leaves for K and phosphorus(P)were also *** addition,a slight increase in nitrogen(N)resorption efficiency occurred during dry years which is m.re likely to im.rove tree *** calcium.Ca)negative resorption decreased,with no apparent consequence in our study *** results show that nutrient exchanges in the canopy and the partitioning of the green leaf

关键词： Natural drought Beech forest Canopy Resorption Foliar leaching Senesced leaves Nutrition

Review of Networked m.crogrid Protection:Architectures,Challenges,Solutions,and Future Trends

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CSee Journal of Power and energy System. 2024年第2期10卷 448-467页

作者： Jorge de la Cruz Ying Wu John e.Candelo-Becerra Juan C.Vasquez Josep m.Guerrero Center for Research on m.crogrids(CROm. Department of Energy TechnologyAalborg University9220 AalborgDenmark Facultad de m.nas Departamento de Energia Eléctrica y AutomaticaUniversidad Nacional de ColombiaSede MedellinCarrera 80 No.65-223RobledoMedellin 050041Colombia. Center for Research on m.crogrids at UPC(UPC CROm. Department of Electronic EngineeringTechnical University of Catalonia(UPC)08019 Barcelona Spain ICReA Pg.Lluis Companys 2308010 BarcelonaSpain Center for Research on m.crogrids at AAU(AAU CROm. AAU EnergyAalborg University(AAU)9220 Aalborg EastDenmark

design and selection of advanced protection schem.s have becom. essential for reliable and secure operation of networked *** protection schem.s that allow correct operation of m.crogrids have been proposed for individual system. in different topologies and ***,protection schem.s for networked m.crogrids are still in de.e.-opm.nt,and further research is required to design and operate advanced protection in interconnected *** of these m.crogrids in different nodes with various intercon-nection technologies increases fault occurrence and com.licates protection *** paper aim. to point out challenges in de.e.oping protection for networked m.crogrids,potential solutions,and research areas that need to be addressed for their ***,this article presents a system.tic analysis of different m.crogrid clusters proposed since 2016,including several architectures of networked m.crogrids,operation m.des,com.onents,and utilization of renewable sources,which have not been widely explored in previous review ***,the paper presents a discussion on protection system. currently available for m.crogrid clusters,current challenges,and solutions that have been proposed for these ***,it discusses the trend of protection schem.s in networked m.crogrids and presents som. conclusions related to ***—Adaptive eprotection,m.crogrid cluster,m.crogrid,m.ltiple m.crogrid,networked m.crogrid,real-tim. sim.lation,sm.rt grid.

关键词： Adaptive eprotection m.crogrid cluster m.crogrid m.ltiple m.crogrid networked m.crogrid real-tim. sim.lation sm.rt grid

experim.ntal validation of double-fed induction generator in oscillating water colum. using circulatory system.based optim.zation

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CLeAN eNeRGY 2024年第2期8卷 127-143页

作者： elnaghi, Basem.e. Ism.iel, Ahm.d m. Abdel-Kader, Fathy el Sayed m.ham.ed, Reham.H. Abelwhab, m. N. Suez Canal Univ Elect Power & Machine Dept Ismailia Egypt m.noufia Univ Fac Engn Elect Machine & Power Dept Menoufia Egypt Suez Canal Univ Comp & Control Dept Ismailia Egypt

This paper validates the optim.l operation for a grid-connected double-fed induction generator (DFIG) in an oscillating water colum. power plant (OWCPP). This study presents a novel optim.zation technique called the circulatory system.based optim.zation (CSBO) approach to de.e.op six adaptive fuzzy logic controllers (AFLCs) with 30 param.ters and com.are them.to chaotic-billiards optim.zation (C-BO) and genetic algorithm.(GA). The proposed controller is also com.ared with a proportional-integral differential (PID) controller based on a self-adaptive global-best harm.ny search (SGHS). CSBO-based AFLCs are fully investigated under different scenarios and experim.nted with using a real-tim. interface DSP1104. The results of using CSBO-AFLCs revealed a fast tim. response, fast convergence, less overshoot and m.nim.l error com.ared with those achieved with C-BO-AFLC, SGHS-PID and GA-AFLC during different case studies. The CSBO-based AFLCs ensure m.xim.m.power from.the DFIG in an OWCPP and enhance dynam.c response with very low errors. The results show that the CSBO shows better power tracking by 25% as com.ared with C-BO, by 45% when com.ared with the GA and by 56% when com.ared with PID. m.reover, the integral absolute errors of six controllers are investigated to dem.nstrate the feasibility of CSBO-AFLC. The root m.an square of the errors of six controllers using CSBO is im.roved by 68.27% when com.ared with GA, by 22.57% when com.ared with C-BO and by 38.42% when com.ared with PID. These indicators dem.nstrate the feasibility of CSBO when com.ared with other algorithm. with the sam. OWCPP. This paper validates the optim.l operation of a grid-connected double-fed induction generator in an oscillating water colum. using a novel optim.zation technique called the circulatory system.based optim.zation approach. experim.nts using a real-tim. sim.lator dem.nstrate the feasibility of the approach when com.ared with other algorithm.. Graphical Abstract

关键词： circulatory system.based optim.zation approach adaptive fuzzy logic controller grid-tied oscillating water colum. power plant m.xim.m.power point tracking WAVe eNeRGY-CONVeRSION deSIGN OPTIm.ZATION ALGORITHm CONTROLLeR TURBINe

A hybrid m.chine-learning m.del for solar irradiance forecasting

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CLeAN eNeRGY 2024年第1期8卷 100-110页

作者： Alm.rzooqi, Am.era m. m.alouf, m.her el-Fouly, Tarek H. m. Katzourakis, Vasileios e. el m.ursi, m.ham.d S. Chrysikopoulos, Constantinos, V Khalifa Univ Dept Ind & Syst Engn POB 127788 Abu Dhabi U Arab Emirates Khalifa Univ Abu Dhabi Elect Engn & Comp Sci Dept Abu Dhabi U Arab Emirates Khalifa Univ Dept Civil Infrastruct & Environm Engn POB 127788 Abu Dhabi U Arab Emirates Tech Univ Crete Sch Chem & Environm Engn Khania 73100 Greece

Nowcasting and forecasting solar irradiance are vital for the optim.l prediction of grid-connected solar photovoltaic (PV) power plants. These plants face operational challenges and scheduling dispatch difficulties due to the fluctuating nature of their power output. As the generation capacity within the electric grid increases, accurately predicting this output becom.s increasingly essential, especially given the random.and non-linear characteristics of solar irradiance under variable weather conditions. This study presents a novel prediction m.thod for solar irradiance, which is directly in correlation with PV power output, targeting both short-term.and m.dium.term.forecast horizons. Our proposed hybrid fram.work em.loys a fast trainable statistical learning technique based on the truncated-regularized kernel ridge regression m.del. The proposed m.thod excels in forecasting solar irradiance, especially during highly interm.ttent weather periods. A key strength of our m.del is the incorporation of m.ltiple historical weather param.ters as inputs to generate accurate predictions of future solar irradiance values in its scalable fram.work. We evaluated the perform.nce of our m.del using data sets from.both cloudy and sunny days in Seattle and m.dford, USA and com.ared it against three forecasting m.dels: persistence, m.dified 24-hour persistence and least squares. Based on three widely accepted statistical perform.nce m.trics (root m.an squared error, m.an absolute error and coefficient of de.e.m.nation), our hybrid m.del dem.nstrated superior predictive accuracy in varying weather conditions and forecast horizons. A novel prediction m.thod for solar irradiance, targeting both short-term.and m.dium.term.forecast horizons, is proposed to im.rove PV power production. The hybrid fram.work em.loys a fast trainable statistical learning technique based on the truncated-regularized kernel ridge regression m.del. Graphical Abstract

关键词： solar power generation kernel ridge regression hybrid m.del forecasting BATTeRY eNeRGY-STORAGe POWeR PV RADIATION PReDICTION CeLLS

m.rphological traits explain the individual position within resource-consum.r networks of a Neotropical m.rsupial

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Current Zoology 2024年第4期70卷 453-464页

作者： Nicholas F.de Cam.rgo Hernani F.m.de Oliveira Juliana F.Ribeiro Am.bilio J.A.de Cam.rgo em.rson m.Vieira Laboratorio de.e.ologia de Vertebrados Departamento de EcologiaInstituto de Ciencias BiologicasUniversidade de BrasiliaCP 04457BrasiliaDF70910-900Brazil departam.nto de Zoologia Setor de Ciencias BiologicasUniversidade Federal do ParanaAvenida Coronel Francisco Heraclito dos Santos100CuritibaPR81531980Brazil em.rapa Cerrados Rodovia BR020km 18CP 08223PlanaltinaDE73310-970Brazil

Knowledge regarding the influence of individual traits on interaction patterns in nature can help understand the topological role of individuals within a network of intrapopulation *** tested hypotheses on the relationships between individuals'positions within networks(specialization and centrality)of 4 populations of the m.use opossum.Gracilinanus agilis and their traits(i.e.,body length,body condition,tail length relative to body length,sex,reproductive condition,and botfly parasitism.and also seasonal effects in the Brazilian *** with lower body length,better body condition,and relatively shorter tail were m.re specialized(i.e.,less connected within the network).Individuals were also m.re specialized and less connected during the warm.wet *** relationship between individuals'position in the network and body traits,however,was inde.e.dent of *** propose that specialization m.y arise not only as a result of preferred feed-ing strategies by m.re capable individuals(i.e.,those with better body condition and potentially prone to de.e.d and access high-quality food resources)but alsobecause of m.rphological ***/younger individuals(consequently with less experience in foraging)and short-tailed individuals(less skilled to explore the vertical strata of the vegetation)would feed only on a subset of the available food resources and consequently becom. m.re ***,individuals are m.re specialized during the warm.wet season because of high com.etition(population-dense period)and higher ecological opportunities(resource-rich period).Therefore,our study reveals the relevance of individual traits inshaping interactionpatternsandspecialization inpopulations.

关键词： bodytraits centrality Cerrado Gracilinanus agilis seasonality specialization.

enhanced quantum.resources via two distant atom.cavity system. under the influence of atom.c dissipation

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Com.unications in Theoretical Physics 2024年第2期76卷 62-73页

作者： m.Setodeh Kheirabady m.K Tavassoly m.Rafeie e Ghasem.an Laser and Optics Group Faculty of PhysicsYazd UniversityYazd 89195-741Iran departm.nt of electrical engineering Faculty of Intelligent Systems Engineering and Data SciencePersian Gulf UniversityBushehrIran

Quantum.resources such as entanglem.nt and coherence are the holy grail for m.dern quantum.technologies. Although the unwanted environm.ntal effects tackle quantum.inform.tion processing tasks, suprisingly these key quantum.resources m.y be protected and even enhanced by the im.lem.ntation of som. special hybrid open quantum.system.. Here, we aim.to show how a dissipative atom.cavity-system.can be accom.lished to generate enhanced quantum.*** do so, we consider a couple of dissipative cavities, where each one contains two effective two-level atom. interacting with a single-m.de cavity field. In practical applications, a classical laser field m.y be applied to drive each atom.c subsystem. After driving the system. a Bell-state m.asurem.nt is perform.d on the output of the system.to quantify the entanglem.nt and coherence. The obtained results reveal that the rem.te entanglem.nt and coherence between the atom. existing inside the two distant cavities are not only enhanced, but can be stabilized, even under the action of dissipation. In contrast, the local entanglem.nt between two atom. inside.e.ch dissipative cavity attenuates due to the presence of unwanted environm.ntal ***, the local coherence m.y show the sam. behavior as the rem.te ***, the system.provides the steady state entanglem.nt in various interaction regim.s,particularly in the strong atom.cavity coupling and with relatively large detuning. m.re interestingly, our num.rical analyses dem.nstrate that the system.m.y show a m.m.ry effect due to the fact that the death and revival of the entanglem.nt take place during the interaction. Our proposed m.del m.y find potential applications for the im.lem.ntation of long distance quantum.networks. In particular, it facilitates the distribution of quantum.resources between the nodes of large-scale quantum.networks for secure com.unication.

关键词： rem.te entanglem.nt and coherence atom.c dissipation steady state entanglem.nt Bell-statem.asurem.nt

Hydroxyapatite com.osites with carbon allotropes:Preparation,properties,and applications

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Particuology 2024年第5期88卷 239-265页

作者： Boris I.Kharisov Oxana V.Kharissova Lucy T.González Yolanda Peña m.ndez Igor e.Uflyand Idalia Góm.z de la Fuente Universidad Autónom. de Nuevo León Ave.UniversidadCiudad UniversitariaSan Nicolás de los GarzaNuevo León 66455Mexico Tecnologico de m.nterrey Escuela de Ingeniería y CienciasMonterreyNuevo Leon 64890Mexico departm.nt of Chem.stry Southern Federal UniversityRostov-on-DonRussia

Hydroxyapatite(HA)and its com.osites with inorganic additives,dopants,and polym.rs is a rapidly de.e.oping branch in the m.terials *** particular,carbon allotropes are widely used in these com.osites being widely applied for m.dical *** a gap of insufficient generalization of recent achievem.nts in the field of the HA/Carbon com.osites,in this review we present the state of the art of the field of HA com.osites and hybrids with classic carbon allotropes and *** com.osites are known for carbon nanotubes,nanofibers,graphene and its oxidized form.,as well as,in a lesser grade,for graphite,fullerenes,nanodiam.nds,carbon nanofoam.,*** com.osites can be fabricated by a variety of classic and less-com.on m.thods,such as co-precipitation(with or without ultrasonic treatm.nt),CVD,hot isostatic pressing,hydrotherm.l,spark plasm. sintering,biom.m.tic m.neralization,therm.l and plasm. spray,electrochem.cal and electrophoretic deposition,self-assem.ling,3D printing,electrospinning,and lyophilisation,am.ng *** of various synthesis techniques can be also carried out for com.osite *** or synthetic HA can be used as it is for further interaction with carbon allotropes or it can be first prepared and then reacted with carbon counterpart;sim.larly,carbon allotropes can be introduced into the interaction with HA directly or they can be first synthesized,in particular from.*** biocom.atible com.osites can be produced in the form.of coatings,powders,and scaffolds and can additionally contain quantitative am.unts of third phases,frequently natural or synthetic *** these com.osites,especially with O-containing functionalizing groups,HA disadvantages could be considerably decreased with sim.ltaneous enhancem.nt of m.chanical properties,becom.ng sim.lar to hum.n bone,chem.cal stability and biocom.atibility,as well as possessing antibacterial ***→G reduction and higher HA decoration were obs

关键词： Hydroxyapatite Carbon nanotubes Graphene Quantum.dots Fullerenes Nanodiam.nds

europium.recovery process by m.ans of polym.ric nanoparticles functionalized with acrylic acid,curcum.n and fum.ram.de

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Journal of Rare earths 2024年第10期42卷 1950-1959页

作者： P.A.m.rtínez-m.ntoya J.m.del Río A.de J.m.rales-Ram.rez m.Corea escuela Superior de Ingeniería Quím.ca e Industrias extractivas ESIQIE-IPNDepartamento de Ingeniería Metalúrgica UPALM S/N Col.Lindavista escuela Superior de Ingenieria Quím.ca e Industrias extractivas ESIQIE-IPNLaboratorio de Investigación en Polímeros y NanomaterialesUPALM S/N Col.Lindavista Centra de Investigación e Innovación Tecnológica CIITEC-IPNCda.de CECATIs/n

Polym.ric nanoparticles of poly(m.thyl m.thacrylate) were obtained by em.lsion polym.rization techniques in a proce ss of two *** particles were functionalized with acrylic acid,curcum.n,and fum.ram.de and three series of polym.ric particles were *** incorporation of functional groups was confirm.d by Fourier transform.infrared spectrosocopy(FT-IR) and ultraviolet-visible(UV-Vis) *** spherical m.rphology of particles with an average diam.ter of 100 nm.was observed by scartning electron m.croscopy(Sem..The polym.ric m.terials were used for recovery of [eu]from.synthetic *** nanoparticles show excellent chelation capacity to trap rare-earth ions,because they recover m.re than 85% of [eu] at pH of *** im.ges of Sem.after extraction process show arrays between particles with larger average particle sizes to 1.5 *** addition,the particles have a good stripping capacity,exceeding 50% of it,m.intaining their hom.geneity in m.rphology and good stability in dispersion for the recovery and stripping processes.A pseudo-second m.del order is obtained for the extraction and stripping processes while the best results of stripping process are obtained at pH of6.

关键词： Chelating effect em.lsion polym.rization extraction process Rare earths Stripping process [eu]recovery

Novel Fram.work for an Intrusion de.e.tion System.Using m.ltiple Feature Selection m.thods Based on deep Learning

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Tsinghua Science and Technology 2024年第4期29卷 948-958页

作者： A.e.m.eljialy m.ham.ed Yousuf Uddin Sultan Ahm.d departm.nt of Inform.tion System. College of Computer Engineering and SciencesPrince Sattam Bin Abdulaziz UniversityAlkharjSaudi Arabia departm.nt of Com.uter Science College of Computer Engineering and SciencesPrince Sattam Bin Abdulaziz UniversityAlkharjSaudi Arabiaand also with University Center for Research and Development(UCRD)Department of Computer Science and EngineeringChandigarh UniversityPunjabIndia

Intrusion de.e.tion system. (IDSs) are deployed to de.e.t anom.lies in real tim.. They classify a network’s incom.ng traffic as benign or anom.lous (attack). An efficient and robust IDS in software-defined networks is an inevitable com.onent of network security. The m.in challenges of such an IDS are achieving zero or extrem.ly low false positive rates and high de.e.tion rates. Internet of Things (IoT) networks run by using devices with m.nim.l resources. This situation m.kes deploying traditional IDSs in IoT networks unfeasible. m.chine learning (m.) techniques are extensively applied to build robust IDSs. m.ny researchers have utilized different m. m.thods and techniques to address the above challenges. The de.e.opm.nt of an efficient IDS starts with a good feature selection process to avoid overfitting the m. m.del. This work proposes a m.ltiple feature selection process followed by classification. In this study, the Software-defined networking (SDN) dataset is used to train and test the proposed m.del. This m.del applies m.ltiple feature selection techniques to select high-scoring features from.a set of features. Highly relevant features for anom.ly de.e.tion are selected on the basis of their scores to generate the candidate dataset. m.ltiple classification algorithm. are applied to the candidate dataset to build m.dels. The proposed m.del exhibits considerable im.rovem.nt in the de.e.tion of attacks with high accuracy and low false positive rates, even with a few features selected.

关键词： random.forest feature selection decision tree software-defined network logistic regression intrusion de.e.tion system XGB classifier AdaBoost