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Reliability of quasi integrable and non-resonant Hamiltonian systems under fractional Gaussian noise excitation

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Acta mechanica Sinica 2020年第4期36卷 902-909页

作者： Q.F.Lu W.Q.Zhu m.L.deng department of mechanics State-Key Laboratory of Fluid Power and Mechatronic SystemsZhejiang UniversityHangzhou 310027China

The reliability of quasi integrable and non-resonant Hamiltonian system under fractional Gaussian noise(fGn)excitation is *** rather flat fGn power spectral density(PSd)in most part of frequency band,the fGn is innovatively regarded as a wide-band ***,the stochastic averaging method for quasi integrable Hamiltonian systems under wide-band noise excitation is applied to reduce 2n-dimensional original system into n-dimensional averaged ltd stochastic differential equations(SdEs).Reliability function and mean first passage time are obtained by solving the associated backward Kolmogorov equation and Pontryagin *** validity of the proposed procedure is tested by applying it to an example and comparing the numerical results with those from monte Carlo simulation.

关键词： Reliability Fkst passage time Quasi integrable and non-resonant Hamiltonian systems Fractional Gauss noise

Effects of g-jitter and radiation on three-dimensional double diffusion stagnation point nanofluid flow

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Applied.m.thematics and mechanics(English edition) 2020年第11期41卷 1707-1722页

作者： m.H.A.KAmAL N.A.RAWI A.ALI S.SHAFIE department of mathematical Sciences Faculty of ScienceUniversiti Teknologi MalaysiaJohor Bahru 81310Johor Darul TakzimMalaysia

The unsteady double diffusion of the boundary layer with the nanofluid flow near a three-dimensional(3d)stagnation point body is studied under a microgravity *** effects of g-jitter and thermal radiation exist under the microgravity environment,where there is a gravitational field with *** flow problem is mathematically formulated into a system of equations derived from the physical laws and principles under the no-slip boundary *** the semi-similar transformation technique,the dimensional system of equations is reduced into a dimensionless system of equations,where the dependent variables of the problem are lessened.A numerical solution for the flow problem derived from the system of dimensionless partial differential equations is obtained with the Keller box method,which is an implicit finite difference *** effects studied are analyzed in terms of the physical quantities of principle interest with the fluid behavior characteristics,the heat transfer properties,and the concentration *** results show that the value of the curvature ratio parameter represents the geometrical shape of the boundary body,where the stagnation point is *** increased.m.dulation amplitude parameter produces a fluctuating behavior on all physical quantities studied,where the fluctuating range becomes smaller when the oscillation frequency ***,the addition of Cu nanoparticles enhances the thermal co.d.ctivity of the heat flux,and the thermal radiation could increase the heat transfer properties.

关键词： stagnation point nanofluid thermal radiation g-jitter double diffusion

Blockchain-based Peer-to-Peer Transactive Energy System for Community microgrid with demand Response management

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作者： m.E.·马丁 d.H.·门泽尔

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CSEE Journal of Power and Energy Systems 2022年第1期8卷 198-211页

作者： Hanumantha Rao Bokkisam Shashank Singh Ritesh mohan Acharya m.P.Selvan National Institute of Technology Tiruchirappalli Tamilnadu 620015India department National Institute of Technology TiruchirappalliTamilnadu 620015India

Interest in transactive energy frameworks(TEFs)is proliferating due to the modern smart grid *** paper proposes a TEF,which applies auction-theory,incorporates a system of agents,and facilitates a transactive energy market(TEm)through an ***,it also enables peer-to-peer(P2P)energy trading among the residential buildings in community microgrid for possible monetary *** this framework,there are three agents,namely,auctioneer,participants,and *** auctioneer is a managing agent modeled using auction theory to.d.termine day-ahead internal market-clearing price and *** participants are autonomous and rational decision-makers;they aim to minimize their electricity bills through the demand response(dR)*** types of architectures,one with the third-party agent demonstrated using the mATLAB environment and the other with the virtual agent(without third-party)implemented using the blockchain environment are *** simulation results reflect significant monetary benefits to each market participant,improved community selfsufficiency,self-consumption,and reduced reliance on the utility grid.

关键词： Blockchain demand response optimization P2P energy trading smart contracts and transactive energy

Proton deflectometry of a capacitor coil target along two axes

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High Power Laser Science and Engineering 2020年第2期8卷 10-18页

作者： P.Bradfo.d.m.P.Read m.Ehret L.Antonelli m.Khan N.Booth K.Glize d.Carroll R.J.Clarke R.heathcote S.Ryazantsev S.Pikuz C.Spindloe J.d.mo.d. B.B.Pollock V.T.Tikhonchuk C.P.Ridgers J.J.Santos N.C.Woolsey York Plasma Institute Department of PhysicsUniversity of YorkHeslingtonYork YO105DDUK Centre Lasers Intenses et Applications University of Bordeaux-CNRS-CEA33405 TalenceFrance Institut fur Kernphysik Tech.Univ.Darmstadt64289 DarmstadtGermany Central Laser Facility Rutherford Appleton LaboratoryChiltonDidcotSTFCUKRIOxfordshireUK Joint Institute for High Temperatures RASMoscow 125412Russia National Research Nuclear University mEPhI Moscow 115409Russia Lawrence Livermore National Laboratory LivermoreCalifornia 94551USA ELI Beamlines Institute of PhysicsCzech Academy of SciencesZa Radnicic 83525241 DolníBrezanyCzech Republic

A developing application of laser-driven currents is the generation of magnetic fields of picoseco.d.nanoseco.d.duration with magnitudes exceeding B=10 ***-loop and helical coil targets can direct laser-driven discharge currents along wires to generate spatially uniform,quasi-static magnetic fields on the millimetre ***,we present proton deflectometry across two axes of a single-loop coil ranging from 1 to 2 mm in *** with proton tracking simulations shows that measured.m.gnetic fields are the result of kiloampere currents in the coil and electric charges distributed around the coil *** this dual-axis platform for proton deflectometry,robust measurements can be made of the evolution of magnetic fields in a capacitor coil target.

关键词： strong magnetic field laser-driven coil targets laser-plasma interaction proton deflectometry laboratory astrophysics

Tribological behaviour of fused deposition modelling printed short carbon fibre reinforced nylon composites with surface textures under dry and water lubricated co.d.tions

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Friction 2022年第12期10卷 2045-2058页

作者： ming LUo Siyu HUANG Ziyan mAN Julie m.CAIRNEY Li CHANG School of Aerospace Mechanical and Mechatronic EngineeringThe University of SydneySydney NSW 2006Australia Australian Centre for microscopy and microanalysis The University of SydneySydney NSW 2006Australia

Fused deposition modelling(Fdm)printed short carbon fibre reinforced nylon(SCFRN)composites were *** friction and wear behaviour of printed.m.terials were systematically investigated under both dry sliding and water lubricated *** results showed that with short fibre enhancements,the printed SCFRN achieved a lower friction coefficient and higher wear resistance than nylon under all tested ***,under water lubricated co.d.tions,the printed SCFRN exhibited a low,stable friction coefficient due to the cooling and lubricating effects of ***,the specific wear rate of the printed specimens could be higher than that obtained under dry sliding co.d.tions,especially when the lo.d.was relatively *** square textured surface was designed and created in the printing process to improve materials’tribological *** was found that with the textured surface,the wear resistance of the printed SCFRN was improved under dry sliding co.d.tions,which could be explained by the debris collection or cleaning effect of surface ***,such a cleaning effect was less noticeable under lubricated co.d.tions,as the liquid could clean the surface *** the other hand,surface textures could increase the surface area exposed to water,causing surface softening due to the higher water absorption *** a result,the samples having surface textures showed higher wear rates under lubricated *** work has provided new insights into.d.signing wear resistant polymer materials using three-dimensional(3d)printing technologies,subjected to.d.fferent sliding co.d.tions.

关键词： fused deposition modelling(Fdm) short carbon fibre reinforced nylon(SCFRN)composites transfer film friction and wear

Adaptive Fault detection Scheme Using an optimized Self-healing Ensemble machine Learning Algorithm

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CSEE Journal of Power and Energy Systems 2022年第4期8卷 1145-1156页

作者： Levent Yavuz Ahmet Soran AhmetÖnen Xiangjun Li S.m.muyeen Electrical and Computer Engineering department in Abdullah Gül University Kayseri 38080Turkey department of Electrical and Computer Engineering College of EngineeringSultan Qaboos UniversityAl-KhoudMuscat123Oman department of Electrical Engineering Qatar UniversityDoha 2713Qatar State Key Laboratory of Control and operation of Renewable Energy and Storage Systems China Electric Power Rescarch InstituteBeijing 100192China

This paper proposes a new cost-efficient,adaptive,and self-healing algorithm in real time that detects faults in a short period with high accuracy,even in the situations when it is difficult to *** than using traditional machine learning(mL)algorithms or hybrid signal processing techniques,a new framework based on an optimization enabled weighted ensemble method is developed that combines essential mL *** the proposed.m.thod,the system will select and compound appropriate mL algorithms based on Particle Swarm optimization(PSo)*** this purpose,power system failures are simulated by using the PSCA d-Python *** of the salient features of this study is that the proposed solution works on real-time raw data without using any pre-computational techniques or pre-stored ***,the proposed technique will be able to work on different systems,topologies,or data *** proposed fault detection technique is validated by using PSCAd-Python co-simulation on a modified and standard IEEE-14 and standard IEEE-39 bus considering network faults which are difficult to.d.tect.

关键词： decision tree(dT) ensemble machine learning algorithm fault detection islanding operation k-Nearest Neighbor(kNN) linear discriminant analysis(LdA) logistic regression(LR) Naive Bayes(NB) self-healing algorithm

Test-retest strength reliability of the Electronic Push/Pull dynamometer (EPPd) in the measurement of the quadriceps and hamstring muscles on a new chair

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open Journal of Internal medicine 2012年第2期2卷 123-128页

作者： mikhled F. maayah mohammad d. Al-Jarrah Saad S. El Zahrani Ali H. Alzahrani Emad T. Ahmedv Amr A. Abdel-Aziem Gopichandran Lakshmanan Nabeel A. Almawajdeh muhsen B. Alsufiany Yaser o. m. Abu Asi department of Family medicine Taif University Taif Kingdom of Saudi Arabia department of Physiotherapy Jordan University of Science and Technology Irbid Jordan department of Preparatory Year Faculty of Applied Medical Science Taif University Taif Kingdom of Saudi Arabia The department of Nursing Faculty of Applied Medical Science Taif University Taif Kingdom of Saudi Arabia The department of Physical Therapy Faculty of Applied Medical Science Taif University Taif Kingdom of Saudi Arabia

Background: Test-retest strength reliability of the Electronic Push/Pull dynamometer (EPPd) in the measurement of the extensor and flexor muscles on a new constructed chair. The objective of the study was to assess reliability of Electronic Push/Pull dynamometer in the measurement of the knee flexion and extension at 90° and 60° on a new constructed chair. The aims of the author: To assess reliability of Electronic Push/Pull dynamometer in the measurement of the knee flexion and extension at 90° and 60° on a new constructed chair. design: A test-retest reliability study. Subjects: one hundred healthy students male and female (mean age, 21y). methods: maximum isometric strength of the quadriceps and hamstring muscle groups was measured using the EPPd were reco.d.d at 60° and 90° for 3 trials on 2 occasions. Reliability was assessed with the Intraclass correlation coefficient (ICC), mean and standard deviation (Sd) of measurements, and smallest real differences were calculated for the maximum and for the mean and work of the 3 repetitions. Results: mean strength ranged from 50.44 kg for knee flexion to 55.76 kg for knee extension 50.44 kg to 61.98 kg at 90° hip flexion. Test-retest reliability Intraclass correlation coefficients (ICCs) ranged from 0.85 to 0.99. ICCs for test-retest reliability ranged from 0.780 to 0.998. Conclusions: The results of the reliability study indicate that the EPPd in reliable dynamometer to use in determining lower limb muscle force production. It can be used to measure disease progression and to evaluate changes in knee extension and flexion strength at the individual patient level.

关键词： muscle Strength Reliability Test-Retest Hand-Held dynamometer Electronic Pull/Push dynamometer

Clones identification of Sequoia sempervirens (d. don) Endl. in Chile by using PCR-RAPds technique

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2009年第2期10卷 112-119页

作者： manuel ToRALIBAEZ margarita CARU miguel A. HERRERA Luis GoNZALEZ Luis m. mARTIN Jorge mIRANdA Rafael m. NAVARRo-CERRILLo department of Forest management Faculty of ForestryUniversity of Chile Santa Rosa 11315La PintanaSantiagoChile department of Ecological Sciences Faculty of SciencesUniversity of ChileSanta Rosa 11315La PintanaSantiagoChile department of Forestry School of Agriculture and Forestry University of Córdoba14080 CórdobaSpain department of Genetic School of Agriculture and ForestryUniversity of Córdoba14080 CórdobaSpain department of Forest management Faculty of ForestryUniversity of ChileSanta Rosa 11315La PintanaSantiagoChile

A protocol of polymerase chain reaction-random amplified polymorphic dNAs (PCR-RAPds) was established to analyse the gene diversity and genotype identification for clones of Sequoia sempervirens (d. don) Endl. in Chile. Ten (out of 34) clones from introduction trial located in Voipir-Villarrica, Chile, were studied. The PCR-RAPds technique and a modified hexadecyltrimethylammonium bromide (CTAB) protocol were used for genomic dNA extraction. The PCR tests were carried out employing 10-mer random primers. The amplification products were detected by electrophoresis in agarose gels. Forty nine polymorphic bands were obtained with the selected primers (BG04, BF07, BF12, BF13, and BF14) and were o.d.red acco.d.ng to their molecular size. The genetic similarity between samples was calculated by the Jaccard index and a dendrogram was con- structed using a cluster analysis of unweighted pair group method using arithmetic averages (UPGmA). of the primers tested, 5 (out of 60) RAPd primers were selected for their reproducibility and high polymorphism. A total of 49 polymorphic RAPd bands were detected out of 252 bands. The genetic similarity analysis demonstrates an extensive genetic variability between the tested clones and the dendrogram depicts the genetic relationships among the clones, suggesting a geographic relationship. The results indicate that the RAPd markers permitted the identification of the assayed clones, although they are derived from the same geo- graphic origin.

关键词： Sequoia sempervirens (d. don) Endl. Random amplified polymorphic dNAs (PCR-RAPds) molecular markers Clone assays Chile Genetic relationships