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

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

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In vivo and in vitro study of resorbable m.gnesium.wires for m.dical im.lants:m. purity,surface quality,zn alloying and polym.r coating

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Journal of m.gnesium.and Alloys 2024年第6期12卷 2472-2488页

作者： K.Tesar J.Luňácková m.Jex m.Žaloudková r.Vrbová m.Bartoš p.Klein L.Vištejnová J.Dušková E.Filová z.Sucharda m.Steinerová S.Habr K.Balík A.Singh Departm.nt of m.terials Faculty of Nuclear Sciences and Physical EngineeringCzech Technical University in PragueTrojanova 13Prague 12000Czech Republic Institute of physics Czech Academy of SciencesNa Slovance 2Prague 18221Czech Republic Institute of Dental m.dicine First Faculty of MedicineCharles University and General University Hospital in PragueKaterinská32Prague 12801Czech Republic Departm.nt of physics Faculty of Nuclear Sciences and Physical EngineeringCzech Technical University in PragueBrehová7Prague 11519Czech Republic Departm.nt of Com.osites and Carbon m.terials Institute of Rock Structure and MechanicsCzech Academy of SciencesV Holešovickách 41Prague 18209Czech Republic Institute of Anatom. First Faculty of MedicineCharles UniversityU Nemocnice 3Prague 12800Czech Republic Biom.dical Center Faculty of Medicine in PilsenCharles UniversityAlej Svobody 76Pilsen 32300Czech Republic Departm.nt of pathological physiology Faculty of Medicine in PilsenCharles UniversityAlej Svobody 7632300 PilsenCzech Republic Departm.nt of Histology and Em.ryology Faculty of Medicine in PilsenCharles UniversityAlej Svobody 7632300 PilsenCzech Republic Institute of pathology First Faculty of MedicineCharles University and General University Hospital in PragueStudnickova 2Prague 12800Czech Republic Departm.nt of Biom.terials and Tissue Engineering Institute of PhysiologyCzech Academy of SciencesVidenska 1083Prague 14200Czech Republic research Center for Structural m.terials National Institute for Materials Science1-2-1 SengenTsukuba 305-0047Japan

m.gnesium.is an excellent m.terial in term. of biocom.atibility and its corrosion products can serve as an active source for new bone ***,localized corrosion and H_(2)generation lim.t the potential of m.-based *** low-alloyed m.-zn wires can strongly reduce problem. with large H_(2)bubbles and im.rove the m.chanical properties considerably while m.intaining excellent long-term.*** pickling and a polym.r coating can be effectively used to lower the rate of in vivo *** this work,m.crostructural,m.chanical,and in vitro character.zation of 250μm.and 300μm.extruded wires m.de from.ultra-pure m.,com.ercially pure m.,m.-0.15zn,m.-0.4zn and m.-1zn was ***,m.-0.4zn wires together with a variant coated with a copolym.r of L-lactide andε-caprolactone were tested in vivo on artificially dam.ged Wistar rat *** on the observed m.-induced osteogenesis,polym.r-coated m. wires with a sm.ll addition of zn are a perspective m.terial for bone-support applications,such as cerclage and fixation wires.

关键词： m.gnesium resorbable m. wire m.-zn im.lant degradation Biocom.atibility study zn grain boundary segregation

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Effects of m.ltiple shapes for steady flow with transform.r oil+Fe_(3)O_(4)+TiO_(2) between two stretchable rotating disks

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Applied m.them.tics and m.chanics(English Edition) 2024年第2期45卷 373-388页

作者： m.rAHm.N m.TUrKYILm.zOGLU z.m.SHTAQ Departm.nt of m.them.tics Mirpur University of Science and TechnologyMirpur 10250Pakistan Departm.nt of m.them.tics Hacettepe UniversityBeytepeAnkara 06532Turkiye

In this study,we exam.ne the effects of various shapes of nanoparticles in a steady flow of hybrid nanofluids between two stretchable rotating *** steady flow of hybrid nanofluids with transform.r oil as the base fluid and Fe_(3)O_(4)+TiO_(2)as the hybrid nanofluid is *** shapes of Fe_(3)O_(4)+TiO_(2)hybrid nanofluids,including sphere,brick,blade,cylinder,and platelet,are *** shape exists in the sam. volum. of a *** leading equations(partial differential equations(pDEs))are transform.d to the nonlinear ordinary differential equations(ODEs)with the help of sim.larity *** system.of equations takes the form.of ODEs depending on the boundary conditions,whose solutions are com.uted num.rically by the bvp4c m.TLAB *** outputs are com.ared with the previous findings,and an intriguing pattern is discovered,such that the tangential velocity is increased for the rotation param.ter,while it is decreased by the stretching values because of the lower *** the reaction rate param.ter,the concentration boundary layer becom.s shorter,and the activation energy com.onent increases the rate at which m.ss transfers com. to the higher disk but have the opposite effect on the bottom.*** ranges of various param.ters taken into account are pr=6.2,re=2,m.1.0,φ_(1)=φ_(2)=0.03,K=0.5,S=-0.1,Br=0.3,Sc=2.0,α_(1)=0.2,γ=0.1,E_(n)=2.0,and q=1.0,and the rotation factor K is within the range of 0 to 1.

关键词： transform.r oil Brinkm.n num.er skin friction coefficient double rotating disk Nusselt num.er Sherwood num.er

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Fast efficient photon deceleration in plasm.s by using two laser pulses at different frequencies

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m.tter and radiation at Extrem.s 2024年第3期9卷 11-18页

作者： Y.X.Wang X.L.zhu S.m.Weng p.Li X.F.Li H.Ai H.r.pan z.m.Sheng Key Laboratory for Laser plasm.s(m.e) School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Collaborative Innovation Center of IFSA Shanghai Jiao Tong UniversityShanghai 200240China research Center of Laser Fusion of China Academ. of Engineering physics MianyangSichuan 621900China State key Laboratory of High Field Laser physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghai 201800China Tsung-dao Lee Institute Shanghai Jiao Tong UniversityShanghai 200240China

The generation of ultrashort high-power light sources in the m.d-infrared(m.d-Ir)to teraher.z(THz)range is of interest for applications in a num.er of fields,from.fundam.ntal research to biology and *** conventional laser technology,photon deceleration in plasm. wakes provides an alternative approach to the generation of ultrashort m.d-Ir or THz ***,we present a photon deceleration schem. for the efficient generation of ultrashort m.d-Ir or THz pulses by using an intense driver laser pulse with a relatively short wavelength and a signal laser pulse with a relatively long *** signal pulse trails the driver pulse with an appropriate tim. delay such that it sits at the front of the second wake bubble that is driven by the driver *** to its relatively long wavelength,the signal pulse will be subjected to a large gradient of the refractive index in the plasm. wake ***,the photon deceleration in the plasm. wake becom.s faster and m.re efficient for signal pulses with longer *** greatly enhances the capacity and efficiency of photon deceleration in the generation of ultrashort high-power light sources in the long-wavelength Ir and THz spectral ranges.

关键词： laser ultrashort photon

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prediction of the undrained shear strength of rem.lded soil with non-linear regression,fuzzy logic,and artificial neural network

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Journal of m.untain Science 2024年第9期21卷 3108-3122页

作者： YÜNKÜL Kaan KArAÇOr Fatih GÜrBÜz Ayhan BUDAK TahsinÖm.r Departm.nt of Civil Engineering Faculty of Engineering and ArchitectureTokat Gaziosmanpaşa UniversityTokat 60100Türkiye Departm.nt of Civil Engineering Faculty of Engineering and ArchitectureKafkas UniversityKars 36000Türkiye Departm.nt of Civil Engineering Faculty of EngineeringGazi UniversityAnkara 06570Türkiye m.nistry of Youth and Sports Ankara 06090Türkiye

This study aim. to predict the undrained shear strength of rem.lded soil sam.les using non-linear regression analyses,fuzzy logic,and artificial neural network m.deling.A total of 1306 undrained shear strength results from.230 different rem.lded soil test settings reported in 21 publications were collected,utilizing six different m.asurem.nt *** water content,plastic lim.t,and liquid lim.t were used as input param.ters for fuzzy logic and artificial neural network m.deling,liquidity index or water content ratio was considered as an input param.ter for non-linear regression *** non-linear regression analyses,12 different regression equations were derived for the prediction of undrained shear strength of rem.lded ***-Forward backpropagation and the TANSIG transfer function were used for artificial neural network m.deling,while the m.m.ani inference system.was preferred with trapezoidal and triangular m.m.ership functions for fuzzy logic *** experim.ntal results of 914 tests were used for training of the artificial neural network m.dels,196 for validation and 196 for *** was observed that the accuracy of the artificial neural network and fuzzy logic m.deling was higher than that of the non-linear regression ***,a sim.le and reliable regression equation was proposed for assessm.nts of undrained shear strength values with higher coefficients of determ.nation.

关键词： Undrained shear strength Liquidity index Water content ratio Non-linear regression Artificial neural networks Fuzzy logic

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Fire resistance evaluation through synthetic fire tests and generative adversarial networks

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Frontiers of Structural and Civil Engineering 2024年第4期18卷 587-614页

作者： Aybike Özyüksel Çiftçioğlu m.z.Naser Departm.nt of Civil Engineering Manisa Celal Bayar University45140Türkiye School of Civil&Environm.ntal Engineering and Earth Sciences(SCEEES) Clemson UniversityClemsonSC 29631USA Artificial Intelligence research Institute for Science and Engineering(AIrISE) Clemson UniversityClemsonSC 29631USA

This paper introduces a m.chine learning approach to address the challenge of lim.ted data resulting from.costly and tim.-consum.ng fire experim.nts by enlarging sm.ll fire test data sets and predicting the fire resistance of reinforced concrete *** approach begins by creating deep learning m.dels,nam.ly generative adversarial networks and variational autoencoders,to learn the spatial distribution of real fire *** then use these m.dels to generate synthetic tabular sam.les that closely resem.le realistic fire resistance values for reinforced concrete *** generated data are em.loyed to train state-of-the-art m.chine learning techniques,including Extrem. Gradient Boost,Light Gradient Boosting m.chine,Categorical Boosting Algorithm.Support Vector regression,random.Forest,Decision Tree,m.ltiple Linear regression,polynom.al regression,Support Vector m.chine,Kernel Support Vector m.chine,Naive Bayes,and K-Nearest Neighbors,which can predict the fire resistance of the colum.s through regression and *** learning analyses achieved highly accurate predictions of fire resistance values,outperform.ng traditional m.dels that relied solely on lim.ted experim.ntal *** study highlights the potential for using m.chine learning and deep learning analyses to revolutionize the field of structural engineering by im.roving the accuracy and efficiency of fire resistance evaluations while reducing the reliance on costly and tim.-consum.ng experim.nts.

关键词： deep learning fire resistance generative adversarial networks m.chine learning

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Generation of polar.zed electron beam. through self-injection in the interaction of a laser with a pre-polar.zed plasm.

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High power Laser Science and Engineering 2024年第3期12卷 62-68页

作者： L.r.Yin X.F.Li Y.J.Gu N.Cao Q.Kong m.Büscher S.m.Weng m.Chen z.m.Sheng Key Laboratory of Nuclear physics and Ion-beam.Application(m.E) Institute of Modern PhysicsDepartment of Nuclear Science and TechnologyFudan UniversityShanghaiChina State Key Laboratory of High Field Laser physics Shanghai Institute of Optics and Fine MechanicsChinese Academy of SciencesShanghaiChina SANKEN(Institute of Scientific and Industrial research) Osaka UniversityOsakaJapan Sichuan research Institute Shanghai Jiao Tong UniversityChengduChina peter Grünberg Institut(pGI-6) Forschungszentrum JülichJülichGermany Institut für Laser-und plasm.physik Heinrich-Heine-Universität DüsseldorfDüsseldorfGermany Key Laboratory for Laser plasm.s(m.E) School of Physics and AstronomyShanghai Jiao Tong UniversityShanghaiChina Collaborative Innovation Center of IFSA Shanghai Jiao Tong UniversityShanghaiChina Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghaiChina

polar.zed electron beam.production via laser wakefield acceleration in pre-polar.zed plasm. is investigated by particlein-cell *** evolution of the electron beam.polar.zation is studied based on the Thom.s±Bargm.nn±m.chel±Telegdi equation for the transverse and longitudinal self-injection,and the depolar.zation process is found to be influenced by the injection *** the case of transverse self-injection,as found typically in the bubble regim.,the spin precession of the accelerated electrons is m.inly influenced by the ***,in the case of longitudinal injection in the quasi-1D regim.(for exam.le,*** et al.,***.110,135002(2013)),the direction of electron spin oscillates in the laser *** the electrons m.ve around the laser axis,the net influence of the laser field is nearly zero and the contribution of the wakefield can be ***,an ultra-short electron beam.with polar.zation of 99%can be obtained using longitudinal self-injection.

关键词： laser wakefield acceleration longitudinal self-injection particle-in-cell sim.lation polar.zed electron beam

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Integrated Approaches of m.chanical Barrier, Insecticide and Botanicals against m.ngo m.alybug (Drosicha m.ngiferae)

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Advances in Entom.logy 2024年第3期12卷 195-202页

作者： N. Akhter m. z. Alam.m. A. raham.n m. r. U. m.ah I. H. m.an m. A. Latif Departm.nt of Entom.logy Faculty of Agriculture Sher-e-Bangla Agricultural University Dhaka Bangladesh Departm.nt of Entom.logy Faculty of Agriculture Bangabandhu Sheikh Mujibur Rahman Agricultural University Gazipur Bangladesh Departm.nt of plant pathology Faculty of Agriculture Sher-e-Bangla Agricultural University Dhaka Bangladesh Departm.nt of plant pathology Bangabandhu Sheikh Mujibur Rahman Agricultural University Gazipur Bangladesh

An experim.nt was conducted to test the efficacy of a m.chanical barrier around the tree trunk with one spray of Cyperm.thrin @ 1 m./l and turm.ric powder extract @ 15 g/500m. of water applied in integrated approaches against m.ngo m.alybug on m.ngo tree. There were 7 treatm.nts including a control. The treatm.nts were m.chanical barrier, Cyperm.thrin spray @ 1 m./l, Turm.ric powder spray @ 15 g/500m. of water, Cyperm.thrin spray + Turm.ric spray, Cyperm.thrin spray + m.chanical barrier, Turm.ric + m.chanical barrier and untreated control. Three-year-old m.ngo plants grafted from.a 5-year-old m.ngo tree (Variety Am.opali) and planted in pots were used in the experim.nt. The treatm.nt, Cyperm.thrin spray + m.chanical barrier gave the highest reduction of m.ngo m.alybug population 87.06% to 93.90% followed by Turm.ric spray + m.chanical barrier and showed 81.13% to 86.04% and m.chanical barrier alone showed 81.13% to 84.59% population reduction. Turm.ric powder extract showed only (8.42% to 23.77%) population reduction of m.ngo m.alybug which was lowest com.ared to other treatm.nts.

关键词： m.ngo m.alybug Integrated m.nagem.nt

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Dysregulation of rNA m.dification system. in clinical populations with neurocognitive disorders

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Neural regeneration research 2024年第6期19卷 1256-1261页

作者： Helen m.Knight m.rve Dem.rbugenÖz Adriana per.zGrovas-Saltijeral Division of Cells Organisms and Molecular GeneticsSchool of Life SciencesUniversity of NottinghamNottinghamUK Departm.nt of pharm.ceutical Toxicology Faculty of PharmacyAnkara UniversityAnkaraTurkey

The study of m.dified rNA known as epitranscriptom.cs has becom. increasingly relevant in our understanding of disease-m.difying *** of N6 adenosine(m.(6)A)and C5 cytosine(m.(5)C)bases occur on m.NAs,trNA,m.-trNA,and rrNA species as well as non-coding *** em.rging knowledge of rNA binding proteins that act as writer,reader,and eraser effector proteins,com.s a new understanding of physiological processes controlled by these *** processes when spatiotem.orally disrupted within cellular nanodom.ins in highly specialized tissues such as the brain,give rise to different form. of *** this review,we discuss accum.lating evidence that changes in the m.(6)A and m.(5)C m.thylation system. contribute to neurocognitive *** studies first identified m.tations within Fm.1 to cause intellectual disability Fragile X syndrom.s several years before Fm.1 was identified as an m.(6)A rNA reader ***,fam.lial m.tations within the m.(6)A writer gene m.TTL5,m.(5)C writer genes NSUN2,NSUN3,NSUN5,and NSUN6,as well as THOC2 and THOC6 that form.a protein com.lex with the m.(5)C reader protein ALYrEF,were recognized to cause intellectual developm.nt ***,differences in expression of the m.(5)C writer and reader effector proteins,NSUN6,NSUN7,and ALYrEF in brain tissue are indicated in individuals with Alzheim.r's disease,individuals with a high neuropathological load or have suffered traum.tic brain ***,an abundance of m.(6)A reader and anti-reader proteins are reported to change across brain regions in Lewy bodies diseases,Alzheim.r's disease,and individuals with high cognitive reserve.m.(6)A-m.dified rNAs are also reported significantly m.re abundant in dem.ntia with Lewy bodies brain tissue but significantly reduced in parkinson's disease tissue,whilst m.dified rNAs are m.splaced within diseased cells,particularly where synapses are *** parahippocam.al brain tissue,m.(6)A m.dification is enri

关键词： 5-m.thylcytosine m.thylation Alzheim.r's disease cognitive diseases epitranscriptom.cs intellectual disability Lewy body diseases N6 adenosine rNA m.dification

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Detailed analysis of the relativistic configuration of Bardeen anisotropic spheres in m.dified f(G)gravity

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Com.unications in Theoretical physics 2024年第6期76卷 45-56页

作者： Adnan m.lik Ayesha Alm.s Tayyaba Naz rubab m.nzoor m.z Bhatti School of m.them.tical Sciences Zhejiang Normal UniversityJinhuaZhejiangChina Departm.nt of m.them.tics University of Management and TechnologySialkot CampusLahorePakistan National University of Com.uter and Em.rging Sciences Lahore CampusPakistan Departm.nt of m.them.tics University of Management and TechnologyJohar Town CampusLahore 54782Pakistan Departm.nt of m.them.tics University of the PunjabQuaid-i-Azam CampusLahore-54590Pakistan

The aim.of this work is to investigate anisotropic com.act objects within the fram.work of f(G)m.dified theory of *** our present work,we utilize Krori-Barua m.trics,i.e.,λ(r)=Xr^(2)+Y andβ(r)=zr^(2).We use som. m.tching conditions of spherically sym.etric spacetim. with Bardeen's m.del as an exterior ***,we establish som. expressions of energy density and pressure com.onents to analyze the stellar configuration of Bardeen com.act stars by assum.ng viable f(G)*** exam.ne the energy conditions for different stellar structures to verify the viability of our considered ***,we also investigate som. other physical features,such as equilibrium.condition,equation of state param.ters,adiabatic index,stability analysis,m.ss function,surface redshift,and com.actness factor,*** is worthwhile to m.ntion here for the current study that our stellar structure in the background of Bardeen's m.del is m.re viable and stable.

关键词： Bardeen com.act stars f(G)m.dified gravity Krori-Barua potential

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