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Hierarchical dispatch of multiple microgrids using nodal price:an approach from consensus and replicator dynamics

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Journal of Modern Power Systems and Clean Energy 2019年第6期7卷 1573-1584页

作者： miguel A.VELASQUEZ Oscar TORRES-PEREZ Nicanor QUIJANO Angela CADENA Department of Electrical and Electronics Engineering Universidad de los AndesBogotaColombia

A hierarchical approach for the energy management of geographically close microgrids connected through a dedicated AC power network is proposed in this *** proposed approach consists of a two-layer energy management system(EMS)for networked *** the lower layer,each micro grid solves its own economic dispatch problem through a distributed model predictive control approach that respects capacity limits and ramp-rate constraints of distributed *** the upper layer,the energy trading in the network of microgrids decides how to optimally trade the energy based on the marginal cost information from the lower layer in order to improve global optimization objectives,e.g.,social *** order to solve the trading problem,a consensusbased algorithm and a replicator dynamics algorithm are proposed assuming that the marginal cost function of the microgrid is known and *** is shown that both algorithms converge to the same solution,which is equivalent to the minimization of operation *** consensus-based algorithm is extended in order to tackle more general marginal cost functions and trading network ***,the effect of ramp constraints and network limits is *** show the effectiveness of the proposed algorithms for three interconnected microgrids with different characteristics.

关键词： Consensus Economic dispatch Hierarchical control Networked microgrids Ramp limits Replicator dynamics

NDRank: optimised parallel search for weather analogues

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Big Earth Data 2023年第2期7卷 276-297页

作者： David Martins miguel Ferreira João Nuno Silva Instituto Superior Técnico Universidade de LisboaLisboaPortugal Caravela Energy Partners DarienConnecticutUSA Distributed Parallel and Secure Systems GroupINESC-ID LisboaLisboaPortugal

Global meteorology data are now widely used in various areas, but one of its applications, weather analogues, still require exhaustive searches on the whole historical data. We present two optimisations for the state-of-the-art weather analogue search algorithms: a parallelization and a heuristic search. The heuristic search (NDRank) limits of the final number of results and does initial searches on a lower resolution dataset to find candidates that, in the second phase, are locally validated. These optimisations were deployed in the Cloud and evaluated with ERA5 data from ECMWF. The proposed parallelization attained speedups close to optimal, and NDRank attains speedups higher than 4. NDRank can be applied to any parallel search, adding similar speedups. A substantial number of executions returned a set of analogues similar to the existing exhaustive search and most of the remaining results presented a numerical value difference lower than 0.1%. The results demonstrate that it is now possible to search for weather analogues in a faster way (even compared with parallel searches) with results with little to no error. Furthermore, NDRank can be applied to existing exhaustive searches, providing faster results with small reduction of the precision of the results.

关键词： Multidimensional arrays weather analogues search parallel computing algorithm optimisation

Comparative Analysis of Tsunami Casualty Estimation Approaches: Agent-Based Modeling versus Simplified Approach in Japanese Coastal Cities

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International Journal of Disaster Risk Science 2024年第5期15卷 719-737页

作者： Tomoyuki Takabatake Nanami Hasegawa Keita Yamaguchi miguel Esteban Department of Civil and Environmental Engineering Kindai University Department of Civil and Environmental Engineering Waseda University

Estimating potential casualties from a significant earthquake and tsunami event is crucial to enhance disaster preparedness and response. Although various approaches exist to assess potential casualties, few studies have made direct comparisons between them. The present study aimed to clarify the diff erences in the estimation of casualties between an agent-based model(ABM), which can capture detailed evacuation behavior but demands significant computational resources, and a simplified approach at less computational cost by assuming that evacuees would move along a straight line from their initial location to the closest evacuation destination. These diff erent approaches were applied to three coastal cities in Japan—Mihama,Kushimoto, and Shingu in Wakayama Prefecture—revealing significant diff erences in the estimated results between the ABM and the simplified approach. Notably, when the eff ects of building collapse due to an earthquake were considered, the mortality rates estimated by the ABM were higher than those estimated by the simplified approach in the three cities. There were also significant diff erences in the spatial distribution of the estimated mortality rates between the ABM and the simplified approach. The findings suggest that while the simplified approach can yield results more quickly, casualty estimates derived from such models should be interpreted with caution.

关键词： Agent-based modeling Building collapse Casualty estimation Evacuation Japan, Tsunami

Thermo-electro-mechanical microstructural interdependences in conductive thermoplastics

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npj Computational Materials 2023年第1期9卷 955-965页

作者： Javier Crespo-miguel Sergio Lucarini Angel Arias Daniel Garcia-Gonzalez Department of Continuum Mechanics and Structural Analysis Universidad Carlos III de MadridAvda.de la Universidad 3028911 LeganésMadridSpain Department of Civil and Environmental Engineering Imperial College of LondonSouth Kensington CampusLondon SW72AZUK

Additive manufacturing has enabled the design of thermoplastic components that provide structural support,electrical conductivity and heat generation modulated by mechanical *** mechanisms and interplays that govern the material response at the microstructural level remain,however,***,we develop an experimental method to characterise conductive filaments from a combined mechanical,electrical and thermal *** approach is used to unravel exciting material interplays of conductive polylactic *** overcome experimental limitations that prevent a complete microstructural analysis of the problem,we develop a full-field homogenisation framework and implement it for finite *** framework accounts for viscoplasticity,electrical and thermal conduction,convection and heat generation via Joule effect,as well as for the interdependences between *** experimental validation,the framework is applied to virtually optimise fabrication requirements to obtain desired properties in final products,i.e.,stiffer products,filaments with higher conductivities or with better sensing capabilities.

关键词： conductive electrical overcome

Are ATXN2 variants modifying our understanding about neural pathogenesis,phenotypes,and diagnostic?

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Neural Regeneration Research 2022年第11期17卷 2445-2447页

作者： Jose miguel Laffita-Mesa Martin Paucar Per Svenningsson Department of Clinical Neuroscience(CNS) Karolinska Universitetssjukhuset

ATXN2 one gene with multiple phenotype effects:ATXN2 gene encodes a cytosolic protein(ataxin-2)with pleiotropic functions(see below).This gene contains a number of exonic Cytosine-Adenine-Guanine(CAG)-repeats which encodes a polyglutamine tract(polyQ)in the N-terminal intrinsically disordered region(IDR)of the ***2CAG repeats are interrupted by CAA codons which is relevant only for DNA and RNA but not for protein since CAA also encodes glutamine(Q).

关键词： pathogenesis neural interrupted

Comparisons of JOULE 1 rocket thermospheric wind observations in high latitudes with GITM simulations

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Science China(Technological Sciences) 2017年第3期60卷 412-418页

作者： DENG Yue LARSEN miguel F RIDLEY Aaron J ZHAN TianYu Department of Physics University of Texas at Arlington Department of Physics Clemson University Center for Space Environment Modeling The University of Michigan

4 Summary and conclusion The JOULE sounding rocket 1 experiment was carried out at Poker Flat Research Range in Alaska around 1200 UT on March 27th,2003 with two instrumented rockets and one chemical tracer *** the released TMA trails,neutral wind measurements from approximately 85 to 160 km altitude showed a vertically propagating wave and a jet structure around 120 km *** shears appeared at the bottom side of the jet with Richardson numbers close to or smaller than the critical value of 0.25,which implies the possible existence of Kelvin-Helmholtz instabilities caused by the vertical shear in the fast flows.

关键词： target tracking parallel vision processor MRID skipping searching image processing

Methylation changes at the GNAS imprinted locus in pancreatic cystic neoplasms are important for the diagnosis of malignant cysts

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World Journal of Gastrointestinal Oncology 2020年第9期12卷 1056-1064页

作者： Sandra Faias Marlene Duarte Luísa pereira Paula Chaves Marília Cravo Antonio Dias pereira Cristina Albuquerque Department of Gastroenterology Instituto Português de Oncologia de Lisboa Francisco GentilEPELisboa 1099-023Portugal Faculty of Health Sciences University of Beira InteriorCovilhã6200-506Portugal Unidade de Investigação em Patobiologia Molecular(UIPM) Instituto Português de Oncologia de Lisboa Francisco GentilEPELisboa 1099-023Portugal Centro de Matemática e Aplicações(CMA-UBI) Universidade da Beira InteriorCovilhã6200-506Portugal Department of Pathology Instituto Português de Oncologia de Lisboa Francisco GentilEPELisboa 1099-023Portugal Department of Gastroenterology Hospital BeatrizÂngeloLoures 2674-514Portugal

BACKGROUND Guanine nucleotide-binding protein,alpha stimulating(GNAS)mutations are characteristic of intraductal papillary mucinous neoplasms(IPMNs).Pancreatic ductal adenocarcinomas(PDACs)harboring GNAS mutations originate in *** is a complex imprinted locus that produces five transcripts regulated by differential methylated regions,NESP55,GNASAS,GNASXL,GNAS1A,and *** To evaluate if methylation changes in the differential methylated regions of GNAS locus contributed to malignant progression of pancreatic *** GNAS locus methylation was analyzed in archival pancreatic cyst fluid(PCF)obtained by endoscopic ultrasound with fine-needle aspiration by methylation specific–multiplex ligation dependent probe *** were normalized and analyzed using *** *** Fifty-two PCF samples obtained by endoscopic ultrasound with fine-needle aspiration and previously characterized for KRAS and GNAS mutations were *** final diagnoses were surgical(11)and clinicopathological(41),including 30 benign cysts,14 pre-malignant cyst,and eight malignant *** changes at NESP55,GNASAS,GNAS1A,and especially GNASXL were more frequent in malignant cysts,and NESP55 and GNASAS were useful for diagnosis.A combined variable defined as“GNAS locus methylation changes”was significantly associated with malignancy(6/8 malignant cysts and only 2/20 benign cysts)and improved *** in both maternally(NESP55)and paternally(GNASXL)derived promoters was found in 3/3 *** This is the first study to identify methylation changes in the GNAS locus,improving the diagnosis of malignant pancreatic cysts and suggesting a role in progression to PDAC.

关键词： Intraductal papillary mucinous neoplasms Pancreas cyst Methylation Biomarker GNAS locus Pancreatic neoplasm

Application of wave equation theory to improve dynamic cone penetration test for shallow soil characterisation

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Journal of Rock Mechanics and Geotechnical Engineering 2022年第1期14卷 289-302页

作者： miguel Angel Benz Navarrete Pierre Breul Roland Gourvès Sol Solution Géotechnique Réseaux ZA des Portes de Riom Nord23 Avenue Georges GershwinRiom Cedex63204France UniversitéClermont Auvergne Institut PascalUMR CNRS 6602Clermont-Ferrand63000France Polytech Clermont-Ferrand Campus des Cézeaux 2 Avenue Blaise PascalAubière Cedex63178France

Among the geotechnical in situ tests,the dynamic penetration test(DPT)is commonly used around the ***,DPT remains a rough technique and provides only one failure parameter:blow count or cone *** paper presents an improvement of the dynamic cone penetration test(DCPT)for soil characterisation based on the wave equation *** on an instrumented lightweight dynamic penetrometer driving with variable energy,the main process of the test involves the separation and reconstruction of the waves propagating in the rods after each blow and provides a dynamic cone load-penetration(DCLT)*** analytical methodology is used to analyse this curve and to estimate additional strength and deformation parameters of the soil:dynamic and pseudo-static cone resistances,deformation modulus and wave *** carried out in the laboratory on different specimens(wood,concrete,sand and clay)in an experimental sand pit and in the field demonstrated that the resulting DCLT curve is reproducible,sensitive and reliable to the test conditions(rod length,driving energy,etc.)as well as to the soil properties(nature,density,etc.).Obtained results also showed that the method based on shock polar analysis makes it possible to evaluate mechanical impedance and wave velocity of soils,as demonstrated by the comparisons with cone penetration test(CPT)and shear wave velocity measurements made in the *** technique improves the method and interpretation of DPT and provides reliable data for shallow foundation design.

关键词： In situ test Dynamic cone penetrometer P.A.N.D.A. Wave equation Wave decoupling Dynamic cone load-penetration(DCLT)curve

Cerium,manganese and cerium/manganese ceramic monolithic *** of VOCs and PM removal

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Journal of Rare Earths 2016年第7期34卷 675-682页

作者： COLMAN-LERNER Esteban PELUSO miguel Andres SAMBETH Jorge THOMAS Horacio Centro de Investigacion y Desarrollo en Ciencias Aplicadas"Dr.Jorge J.Ronco"CONICET CCT La Plata UNLP47 N0 257(1900)La PlataArgentina Fac.de Ciencias Exactas UNLP47 and 115(1900)La PlataArgentina Centro de Investigaciones del Medio Ambiente(CIMA).Facultad de Ciencias Exactas UNLP.47y 115.1900-La Plata Planta Piloto Multiproposito PLAPIMU CICPBA-UNLPC.Centenario and 506M ***Argentina

Ceramic supported cerium, manganese and cerium-manganese catalysts were prepared by direct impregnation of aq precursor, and characterized by scanning electron microscopy （SEM）, X-ray diffraction （XRD）, Brunauer-Emmett-Teller rn （BET）, temperature programmed reduction （Ha-TPR）, X-ray photoelectron spectroscopy （XPS） acidity measurements and elec conductivity. The catalytic activity was evaluated for volatile organic compounds （VOC）（ethanol, methyl ethyl ketone and tol oxidation. Additionally, catalysts were tested in particulate matter （PM） combustion. The characterization results indicated that Ce was in the form of Ce4＋ and Ce3＋, and Mn existed in the form of Mn4＋ and Mn3＋ on the surface of the Mn/AC sample and in the of Mn4＋ in the Ce/Mn/AC monolith. VOC oxidation results revealed that the Ce/Mn/AC sample showed an excellent perforr compared with ceramic supported CeO2 （Ce/AC） and MnO, （Mn/AC） samples. The PM combustion was also higher on Ce/M monoliths. The enhanced catalytic activity was mainly attributed to the Ce and Mn interaction which enhanced the acidity, cond ity and the reducibility of the oxides.

关键词： monolith VOCs MnOx Ce PM clays rare earths