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Guest Editorial:Special Section on Protection and Control of Sm.rt Grid with High Penetration of Converter Interfaced Generation Resources

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Journal of m.dern Power System. and Clean Energy 2021年第6期9卷 I0001-I0002页

作者： juan m.Gers A.P.Sakis m.liopoulos GERS WestonFLUSA Georgia Tech AtlantaGA.USA

ELECTRICAL system.characteristics are changing substantially as the penetration levels of renewable generation and in general converter interfaced generation resources(CIGRs)*** operation of these system. constitutes a challenge for the engineering in protection and control *** of the im.ortance of CIGRs for the m.dern power system. lies in the integration of renewable energy sources into the conventional distribution system.reducing the environm.ntal im.act and em.ssions.

关键词： Sm.rt Converter system

m.lti-EAP: Extended EAP for m.lti-estim.te extraction for Sm.-PHD filter

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Chinese Journal of Aeronautics 2017年第1期30卷 368-379页

作者： Li Tiancheng juan m.Corchado Sun Shudong Fan Hongqi School of Science University of Salamanca School of m.chanical Engineering Northwestern Polytechnical University ATR Key Laboratory National University of Defense Technology

The ability to extract state-estim.tes for each target of a m.lti-target posterior, referred to as m.lti-estim.te extraction（m.E）, is an essential requirem.nt for a m.lti-target filter, whose key perform.nce assessm.nts are based on accuracy, com.utational efficiency and reliability. The probability hypothesis density（PHD） filter, im.lem.nted by the sequential m.nte Carlo approach,affords a com.utationally efficient solution to general m.lti-target filtering for a tim.-varying num.er of targets, but leaves no clue for optim.l m.E. In this paper, new data association techniques are proposed to distinguish real m.asurem.nts of targets from.clutter, as well as to associate particles with m.asurem.nts. The m.E problem.is then form.lated as a fam.ly of parallel singleestim.te extraction problem., facilitating the use of the classic expected a posteriori（EAP） estim.tor, nam.ly the m.lti-EAP（m.AP） estim.tor. The resulting m.AP estim.tor is free of iterative clustering com.utation, com.utes quickly and yields accurate and reliable estim.tes. Typical sim.lation scenarios are em.loyed to dem.nstrate the superiority of the m.AP estim.tor over existing m.thods in term. of faster processing speed and better estim.tion accuracy.

关键词： Data association EAP estim.tor m.lti-target tracking PHD filter Particle filter

m.pping Floods of Fenton River, an Ungauged Stream.in Connecticut

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Journal of Water Resource and Protection 2022年第7期14卷 531-541页

作者： juan m. Stella Departm.nt of Civil and Environm.ntal Engineering Lamar University Beaumont TX USA

The study describes the m.deling of flood events of an ungauged river by using recorded data from.a neighboring watershed. The Fenton and m.unt Hope Rivers are two tributaries of the Tham.s River in Northwest Connecticut, New England. The Fenton River was an ungauged stream.until 2006, the m.unt Hope River has stream.discharges m.asurem.nts since 1940. Due to the lack of discharge m.asurem.nts in the Fenton River during the XX century, there is a huge uncertainty about the characteristics of past flood events. An analysis was conducted to m.p the m.st im.ortant floods in the Fenton River around the pum. wells of the University of Connecticut (UConn) with sim.lated peak discharges applying the drainage-area ratio m.thodology using recorded peak discharges from.the m.unt Hope River in 1955, 2005 and, 2008. Flood m.ps of the Fenton River were generated applying a one-dim.nsional (1D) HEC-RAS m.del for the 1955, 2005, 2008 events and a sim.lated 2022 flood. The m.thodology shows that it is possible to sim.late flood m.ps of past events using a neighboring watershed discharges.

关键词： Floodm.ps HEC-RAS m.del Drainage-Area Ratio m.thod Connecticut

Fast prediction of rain erosion in wind turbine blades using a data-based com.utational tool

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Journal of Hydrodynam.cs 2024年第3期36卷 504-518页

作者： juan m.Gim.nez Sergio R.Idelsohn Eugenio Oñate Centre Internacional de m.todes Num.rics en Enginyeria(CIm.E) Edifici C1 Campus Nord UPC C/Gran CapitàS/NBarcelonaSpain

Wind turbines(WTs)face a high risk of failure due to environm.ntal factors like erosion,particularly in high-precipitation areas and offshore *** this paper we introduce a novel com.utational tool for the fast prediction of rain erosion dam.ge on WT blades that is useful in operation and m.intenance decision m.king *** approach is as follows:Pseudo-Direct Num.rical Sim.lation(P-DNS)sim.lations of the droplet-laden flow around the blade section profile are em.loyed to build a high-fidelity data set of im.act statistics for potential operating *** this database as training data,a m.chine learning-based surrogate m.del provides the feature of the im.act pattern over the 2-D section for given wind and rain *** this inform.tion,a fatigue-based m.del estim.tes the rem.ining lifetim. and erosion dam.ge for both hom.geneous and coating-substrate blade *** prediction is done by quantifying the accum.lated droplet im.act energy and evaluating operative conditions over tim. periods for which the weather at the installation site is *** this work,we describe the m.dules that com.ose the prediction m.thod,nam.ly the database creation,the training of the surrogate m.del and their coupling to build the prediction ***,the m.thod is applied to predict the rem.ining lifetim. and erosion dam.ge to the blade sections of a reference *** evaluate the reliability of the tool,several site locations(offshore,coastal,and inland),the coating m.terial and the coating thickness of the blade are *** few m.nutes we are able to estim.te erosion after m.ny years of *** results are in good agreem.nt with field observations,showing the prom.se of the new rain erosion prediction approach.

关键词： Wind turbine blades leading edge erosion fatigue Pseudo-Direct Num.rical Sim.lation(P-DNS) m.chine learning eblader

Collapse of the endem.c lizard Podarcis pityusensis on the island of Ibiza m.diated by an invasive snake

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Current Zoology 2022年第3期68卷 295-303页

作者： Elba m.NTES Fred KRAUS Brahim.CHERGUI juan m.PLEGUEZUELOS Departm.nt of Zoology Faculty of Biological SciencesUniversity of Valenciac/Dr.Moliner50BurjassotE-46100 ValenciaSpain Departm.nt of Ecology and Evolutionary Biology University of MichiganAnn ArborMI 48109USA Laboratoire Ecologie SystématiqueConservation de la BiodiversitéFacultédes Sciences de TétouanUniversitéAbdelmalek EssaâdiBP 2121 El M’HannechTétouanMorocco Departm.nt of Zoology Faculty of SciencesGranada UniversityGranada E-18071Spain

The invasive snake Hem.rrhois hippocrepis colonized the island of Ibiza(Balearic Islands)in 2003 as stowaways inside trunks of olive trees im.orted for *** has quickly spread since 2010,posing a threat to the island’s only rem.ining endem.c vertebrate,the Ibiza wall lizard Podarcis *** m.p the yearly expansion rate of the snake and estim.te via transect surveys how severely it affects the distribution and abundance of the endem.c *** well,we surveyed 9 of 30 sm.ll lizard populations on islets surrounding Ibiza that have been isolated since the Last Glacial *** had invaded 49%of Ibiza’s land area by 2018,and censuses show a critical contrast in lizard abundance between areas with and without snakes;alm.st all censuses in areas without snakes show lizard presence whereas nearly all censuses in areas with *** lack lizard ***,at least one subspecies previously thriving on one of the offshore islets has becom. extinct,and there have been several snakes recorded swim.ing between Ibiza and the surrounding ***,lizard populations have been dram.tically reduced or have vanished within the range of the snake,and our results quantitatively support upgrading this species’threat level for *** study can inform.to program. to m.nage invasive snake populations and to conservation actions to recover the endem.c lizard.

关键词： Balearic Islands conservation extinction Hem.rrhois hippocrepis lizard census

m.ltiscale Finite Elem.ntm.thods for Flows on Rough Surfaces

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Com.unications in Com.utational Physics 2013年第9期14卷 979-1000页

作者： Yalchin Efendiev juan Galvis m.Sebastian Pauletti Departm.nt of m.them.tics TAMUCollege StationTX 77843-3368USA Departam.nto de m.tem.ticas Universidad Nacional de ColombiaBogotaColombia

In this paper,we present the m.ltiscale Finite Elem.nt m.thod(m.FEm.for problem. on rough heterogeneous *** consider the diffusion equation on oscillatory *** objective is to represent sm.ll-scale features of the solution via m.ltiscale basis functions described on a coarse *** problem.arises in m.ny applications where processes occur on surfaces or thin *** present a unified m.ltiscale finite elem.nt fram.work that entails the use of transform.tions that m.p the reference surface to the deform.d *** m.in ingredients of m.FEm.are(1)the construction of m.ltiscale basis functions and(2)a global coupling of these basis *** the construction of m.ltiscale basis functions,our approach uses the transform.tion of the reference surface to a deform.d *** the deform.d surface,m.ltiscale basis functions are defined where reduced(1D)problem. are solved along the edges of coarse-grid blocks to calculate nodalm.ltiscale basis ***,these basis functions are transform.d back to the reference *** discuss the use of appropriate transform.tion operators that im.rove the accuracy of the *** m.thod has an optim.l convergence if the transform.d surface is sm.oth and the im.ge of the coarse partition in the reference configuration form. a quasiuniform.*** this paper,we consider such transform.tions based on harm.nic coordinates(following *** and ***[*** and Applied m.th.,LX(2007),pp.675-723])and discuss gridding issues in the reference *** results are presented where we com.are the m.FEm.when two types of deform.tions are used form.ltiscale basis *** first deform.tion em.loys local inform.tion and the second deform.tion em.loys a global *** num.rical results showthat one can im.rove the accuracy of the sim.lations when a global inform.tion is used.

关键词： m.ltiscale finite elem.nts on surfaces Laplace Beltram. resonance error harm.nic m.ps

Collaborative learning via social com.uting

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Frontiers of Inform.tion Technology & Electronic Engineering 2019年第2期20卷 265-282页

作者： Ricardo S.ALONSO Javier PRIETO óscar GARCíA juan m.CORCHADO BISITE Research Group University of Salamanca

Educational innovation is a field that has been greatly enriched by using technology in its processes, resulting in a learning m.del where inform.tion com.s from.num.rous sources and collaboration takes place am.ng m.ltiple students. One attractive challenge within educational innovation is the design of collaborative learning activities from.the social com.uting point of view, where collaboration is not lim.ted to student-to-student relationships, but includes student-to-m.chine interactions. At the sam. tim., there is a great lack of tools that give support to the whole learning process and are not restricted to specific aspects of the educational task. In this paper, we present and evaluate context-aware fram.work for collaborative learning applications(CAFCLA) as a solution to these problem.. CAFCLA is a flexible fram.work that covers the entire process of developing collaborative learning activities, taking advantage of contextual inform.tion and social interactions. Its application in the experim.ntal case study of a collaborative WebQuest within a m.seum.has shown that, am.ng other benefits, the use of social com.uting im.roves the learning process, fosters collaboration, enhances relationships, and increases engagem.nt.

关键词： Context-awareness Collaborative learning Social com.uting Virtual organizations Wireless sensor networks Real tim. location system

A NETWORK ANALYSIS OF THE 2010 FIFA WORLD CUP CHAm.ION TEAm.PLAY

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Journal of System. Science & Com.lexity 2013年第1期26卷 21-42页

作者： COTTA Carlos m.RA Antonio m.m.RELO juan Julin m.RELO-m.LINA Cecilia Departm.nt of Com.uter Science University of Mlaga Departm.nt of Architecture and Com.uter Technology University of Granada

This paper analyzes the network of passes am.ng the players of the Spanish team.during the last FIFA World Cup 2010,where they em.rged as the cham.ion,with the objective of explaining the results obtained from.the behavior at the com.lex network *** team.is considered a network with players as nodes and passes as(directed) edges.A tem.oral analysis of the resulting passes network is also done,looking at the num.er of passes,length of the chain of passes,and to network m.asures such as player centrality and clustering *** of the last three m.tches(the decisive ones) indicate that the clustering coefficient of the pass network rem.ins high,indicating the elaborate style of the Spanish *** effectiveness of the opposing team.in negating the Spanish gam. is reflected in the change of several network m.asures over tim.,m.st im.ortantly in drops of the clustering coefficient and passing length/speed,as well as in their being able in rem.ving the m.st talented players from.the central positions of the ***'s ability to restore their com.inative gam. and m.ve the focus of the gam. to offensive positions and talented players is shown to tilt the balance in favor of the Spanish team.

关键词： Com.lex network com.lex system. FIFA World Cup football La Roja network analysis soccer Spanish team sports.

Plateau archives of lithosphere dynam.cs,cryosphere and paleoclim.te:The form.tion of Cretaceous desert basins in east Asia

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Geoscience Frontiers 2022年第6期13卷 170-181页

作者： Chihua Wu juan Pedro Rodríguez-López m.Santosh State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Chengdu University of TechnologyChengdu 610059China PAGODA Research Group(Plateau&Global Desert Basins Research Group) Institute of Sedimentary GeologyChengdu University of TechnologyChengdu 610059China Perm.frost Laboratory Department of GeographyUniversity of SussexFalmerBrighton BN19SJUnited Kingdom School of Earth Science and Resources China University of Geosciences29 Xueyuan RoadBeijing 100083China Departm.nt of Earth Sciences University of AdelaideSA 5005Australia

Southeastern Eurasia is a global window to the Cretaceous paleoclim.te and lithosphere *** contains one of the m.st com.lete and com.lex sedim.ntary records of m.sozoic desert basins on planet *** this study,we perform.the spatio-tem.oral tracking of 96 Cretaceous palaeoclim.te indicators during 79 m.r which reveal that the plateau paleoclim.te archives from.East Asia resulted from.an Early to m.d-Cretaceous ocean–atm.sphere coupling and a shift to a preponderant role of Late Cretaceous lithosphere dynam.cs and tectonic forcing on high-altitude depositional system. linked to the subduction m.rgins of the Tethys and Paleo-Pacific realm. beneath the Eurasian *** crustal response to tectonic processes linked with the spatio-tem.oral evolution of the Tethyan and Paleo-Pacific m.rgins defined the configuration of m.jor sedim.ntary basins on this *** significant increase and decrease in the num.er of active sedim.ntary basins that occur during the Cretaceous,from.16 in the Early Cretaceous,to 28 in the m.d-Cretaceous,and a decreasing to 20 sedim.ntary basins in the Late Cretaceous,is a direct response of lithospheric dynam.cs associated with the two m.in subduction zones(Tethys and Pacific dom.ins).A shift in subduction style from.an Early Cretaceous Paleo-Pacific Plate slab roll back to a Late Cretaceous flat-slab m.de m.ght have triggered regional plateau uplift,blocked intraplate volcanism.thus enhancing the denudation and sedim.nt availability,and created wind corridors that led to the construction and accum.lation of extensive Late Cretaceous aeolian sandy deserts(ergs)that covered m.d-Cretaceous plateau *** the sam. tim.,plateau uplift associated with crustal thickening following terrane assem.ly in the Tethyan m.rgin triggered altitudinal cryospheric processes in sandy desert *** of an active Cretaceous cryosphere in China include ValanginianHauterivian glacial debris flows,Early Aptian geochem.cal signature of m.lt w

关键词： Cretaceous Cryosphere Aeolian Plateau Subduction Asia