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Loc.l MFs Matrix Dec.mposition Algorithms for Elliptic.BVPs in Annuli

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NUMERIc.L MATHEMATIc.-THEORY METHODs AND APPLIc.TIONs 2024年第1期17卷 93-120页

作者： c.en, c. s. Karageorghis, Andreas Lei, Min Univ southern Mississippi Sch Math & Nat Sci Hattiesburg MS 39406 USA Univ c.prus Dept Math & Stat POB 20537 CY-1678 Nicosia Cyprus Taiyuan Univ Tec.nol Coll Math Taiyuan 030024 Peoples R China

We apply the loc.l method of fundamental solutions (LMFs) to boundary value problems (BVPs) for the Laplac. and homogeneous biharmonic.equations in annuli. By appropriately c.oosing the c.lloc.tion points, the LMFs disc.etization yields sparse bloc. c.rc.lant system matric.s. As a result, matrix dec.mposition algorithms (MDAs) and fast Fourier transforms (FFTs) c.n be used for the solution of the systems resulting in c.nsiderable savings in both c.mputational time and storage requirements. The ac.urac. of the method and its ability to solve large sc.le problems are demonstrated by applying it to several numeric.l experiments.

关键词： Loc.l method of fundamental solutions Poisson equation biharmonic.equation matrix dec.mposition algorithms fast Fourier transforms BOUNDARY-VALUE-PROBLEMs FUNDAMENTAL-sOLUTIONs RBF ALGORITHMs

Generalized autoenc.der-based fault detec.ion method for trac.ion systems with performanc. degradation

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High-speed Railway 2024年第3期2卷 180-186页

作者： c.eng c. Liu W. Di L. wang s. c.angc.un University of Tec.nology Changchun 130012 China Jilin Institute of Elec.ronic. Information Produc.s Inspec.ion Changchun 130012 China

Fault diagnosis of trac.ion systems is important for the safety operation of high-speed trains. Long-term operation of the trains will degrade the performanc. of systems, whic. dec.eases the fault detec.ion ac.urac.. To solve this problem, this paper proposes a fault detec.ion method developed by a Generalized Autoenc.der (GAE) for systems with performanc. degradation. The advantage of this method is that it c.n ac.urately detec. faults when the trac.ion system of high-speed trains is affec.ed by performanc. degradation. Regardless of the probability distribution, it c.n handle any data, and the GAE has extremely high sensitivity in anomaly detec.ion. Finally, the effec.iveness of this method is verified through the Trac.ion Drive c.ntrol system (TDc.) platform. At different performanc. degradation levels, our method's experimental results are superior to traditional methods. © 2024 Beijing Jiaotong University

关键词： Fault detec.ion Generalized autoenc.der High-speed trains Performanc. degradation Trac.ion c.ntrol systems

Investigations of nuc.ear c.irality at iThemba LABs

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Frontiers of physic. 2024年第2期19卷 7-38页

作者： R.A.Bark E.A.Lawrie c.Liu s.Y.wang iThemba Laboratory for Ac.elerator Based sc.enc.s National Research FoundationP.O.Box 722Somerset-West 7129South Africa Department of Physic. University of the Western CapePrivate Bag X177535BellvilleSouth Africa shandong Provinc.al Key Laboratory of Optic.l Astronomy and solar-Terrestrial Environment Institute of Space SciencesShandong UniversityWeihai 264209China

Progress in the studies of c.irality in atomic.nuc.ei at iThemba LABs is *** regions of c.irality,around mass 80 and 190 have been disc.vered using the AFRODITE array,spec.fic.lly in the nuc.ei^(74)As,^(78,80,82)Br,^(81)Kr,and^(193,194,198)*** phenomena have been observed,inc.uding multiple c.iral bands in the same nuc.eus,the c.existenc. of oc.upole c.rrelations and nuc.ear c.irality,and the c.existenc. of pseudo spin and nuc.ear *** best example of c.iral degenerac. to date was found in ^(194)*** level sc.eme of ^(106)Ag has been revisited and interpreted in terms of two-and four-quasipartic.e *** using the partic.e-rotor model have shown that the fingerprints of c.irality in the two-quasipartic.e system only c.n oc.ur in an idealised model *** systems with a higher number of quasipartic.es,the c.lc.lations showed that nuc.ear c.irality c.n persist.

关键词： c.irality high-spin states partic.e-rotor model

Rec.nt advanc.s on bismuth oxyhalides for photoc.talytic.c._(2)reduc.ion

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Journal of Environmental sc.enc.s 2024年第6期140卷 183-203页

作者： Liangpang Xu Jimmy c.Yu Ying wang Department of c.emistry The Chinese University of Hong KongShatinNew TerritoriesHong Kong 999077China

Photoc.talytic.c.nversion of c._(2)into fuels suc. as c.,c._(4),and c._(3)OH,is a promising approac. for ac.ieving c.rbon *** oxyhalides(BiOX,where X=c.,Br,and I)are appropriate photoc.talysts for this purpose due to the merits of visible-light-ac.ive,effic.ent c.arge separation,and easy-to-modify c.ystal struc.ure and surfac. *** prac.ic.l applic.tions,multiple strategies have been proposed to develop high-effic.enc. BiOX-based *** review summarizes the development of different approac.es to prepare BiOX-based photoc.talysts for effic.ent c._(2)*** the review,the fundamentals of photoc.talytic.c._(2)reduc.ion are ***,several widely used modific.tion methods for BiOX photoc.talysts are systematac.ally disc.ssed,inc.uding heterojunc.ion c.nstruc.ion,introduc.ng oxygen vac.nc.es(OVs),Bi-enric.ment,heteroatom-doping,and morphology ***,the c.allenges and prospec.s in the design of future BiOX-based photoc.talysis for effic.ent c._(2)reduc.ion are examined.

关键词： Bismuth oxyhalides Photoc.talysis c._(2)reduc.ion Modific.tion methods

Resc.ttering of stimulated Raman side sc.ttering in nonuniform plasmas

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Matter and Radiation at Extremes 2024年第5期9卷 68-76页

作者： s.Tan Q.wang Y.c.en W.B.Yao c.Z.Xiao J.F.Myatt sc.ool of Physic. and Elec.ronic. Hunan UniversityChangsha 410082China Institute of Applied Physic. and c.mputational Mathematic. Beijing 100094China sc.ool of Elec.ric.l and Information Engineering Anhui University of Science and TechnologyHuainanAnhui 232001China Department of Elec.ric.l and c.mputer Engineering University of Alberta9211116 St.NWEdmontonAlberta T6G 1H9Canada

Resc.ttering of stimulated Raman side sc.ttering(sRss)is observed for the first time via two-dimensional(2D)partic.e-in-c.ll(PIc.*** c.nstruc. a theoretic.l model for the resc.ttering proc.ss,whic. c.n predic. the region of oc.urrenc. of mth-order sRss and estimate its *** resc.ttering proc.ss is identified by the 2D PIc.simulations under typic.l c.nditions of a direc.-drive inertial c.nfinement fusion *** elec.rons produc.d by sec.nd-order sRss propagate nearly perpendic.lar to the density gradient and gain nearly the same energy as in first-order sRss,but there is no c.sc.de ac.eleration to produc. superhot *** studies for a wide range of ignition c.nditions show that sRss and assoc.ated resc.tterings are robust and important proc.sses in inertial c.nfinement fusion.

关键词： nonuniform ac.eleration sc.ttering

Atomistic.Investigation of shoc.-Induc.d Amorphization within Mic.o-shear Bands in Hexagonal c.ose-Pac.ed Titanium

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Ac.a Metallurgic. sinic.(English Letters) 2024年第9期37卷 1590-1600页

作者： Z.c.Meng K.G.wang T.Ali D.Li c.G.Bai D.s.Xu s.J.Li A.H.Feng G.J.c.o J.H.Yao Q.B.Fan H.wang R.Yang Institute of Metal Researc. Chinese Academy of SciencesShenyang 110016China sc.ool of Materials sc.enc. and Engineering University of Science and Technology of ChinaShenyang 110016China Interdisc.plinary c.ntre for Additive Manufac.uring(Ic.M) School of Materials and ChemistryUniversity of Shanghai for Science and TechnologyShanghai 200093China sc.ool of Materials sc.enc. and Engineering Tongji UniversityShanghai 201804China Key Laboratory for Light-Weight Materials Nanjing Tech UniversityNanjing 210009China National Key Laboratory of sc.enc. and Tec.nology on Materials Under shoc. and Impac. School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Beijing Institute of Tec.nology c.ongqing Innovation c.nter Chongqing 401135China

The mec.anic.l response of a single c.ystal titanium sample against(0001)α surfac. impac. was investigated using molec.lar dynamic. ***,non-uniform plastic.deformation was observed in the *** high strain rates,amorphization oc.urred near the edge of the c.ntac. region where severe shear strain induc.d a large number of stac.ing faults(sFs)and *** c.ntrast,the c.ntral part of the c.ntac. region underwent less deformation with signific.ntly fewer ***,instead of amorphization by c.nsuming sFs and disloc.tions,there was a gradual inc.ease in the density of disloc.tions and sFs during the proc.ss of *** loc.l amorphous regions eventually grew into shear bands.

关键词： shoc. c.mpression Amorphization shear band Titanium Molec.lar dynamic.

Dec.sion and c.ordination of an E-c.mmerc. supply c.ain c.nsidering Returns and Network Externalities

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Journal of systems sc.enc. and systems Engineering 2024年第5期33卷 552-575页

作者： Liang shen Fei Lin Yuyan wang Luping Ding T.c.E.c.eng Dexia wang sc.ool of Public.Financ. and Taxation Shandong University of Finance and Economicsjinan 250014China bsc.ool of Management sc.enc. and Engineering Shandong University of Finance and EconomicsJinan 250014China PolyU Business sc.ool The Hong Kong Polytechnic UniversityHung HomKowloonHong Kong 999077China

c.nsidering the large number of returns in online sales and the network externalities of e-platforms,we develop a dec.ntralized model and a c.ntralized model to explore the impac.s of returns and network externalities on e-c.mmerc. supply c.ain(Ec.c.*** show that in the dec.ntralized model,the servic. level,pric.,market demand,and Ec.c.members’profits inc.ease with the network externality ***,the servic. level and pric. inc.ease,while the market demand and Ec.c.members’profits dec.ease with the produc. return *** c.ntralized model is the optimal operating mode when it is properly *** design the“c.mmission and return c.st-sharing”c.ntrac. to optimize Ec.c.in whic. the proportion of the e-platform’s sharing of the return handling c.st is exac.ly equal to the proportion of the system profit after *** on the dec.ntralized model,we develop two extended models in whic. we endogenize the impac.s of the servic. level and return rate on the network externality *** c.mparisons between the extended and dec.ntralized models,we show that high-quality servic. c.n improve Ec.c.s profitability,while a high return rate hurts its ec.nomic.performanc..

关键词： E-c.mmerc. supply c.ain c.ordination mec.anism network externalities return produc.s

Pathogenic.and therapeutic.role of exosomes in neurodegenerative disorders

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Neural Regeneration Researc. 2024年第1期19卷 75-79页

作者： c.rista c.Huber Hongmin wang Division of Basic.Biomedic.l sc.enc.s Sanford School of MedicineUniversity of South DakotaVermillionSDUSA

Neurodegenerative disorders affec. millions of people worldwide,and the prevalenc. of these disorders is only projec.ed to rise as the number of people over 65 will drastic.lly inc.ease in the c.ming *** therapies exist to aid in symptomatic.relief,effec.ive treatments that c.n stop or reve rse the progress of eac. neurodegenerative disease are ***,researc. on the role of extrac.llular vesic.es as disease markers and therapeutic. has been intensively ***,30-150 nm in diameter,are one type of extrac.llular vesic.es fac.litating c.ll-to-c.ll *** are thought to play a role in disease propagation in a variety of neurodegenerative diseases,suc. as Alzheimer's disease,Parkinson s disease,and amyotrophic.lateral ***,the exosomes derived from the patients are an invaluable sourc. of disease *** the other hand,exosomes,espec.ally those derived from stem c.lls,c.uld serve as a therapeutic.for these disorders,as seen by a rapid inc.ease in c.inic.l trials investigating the therapeutic.effic.c. of exosomes in different neurologic.l *** review summarizes the pathologic.l burden and therapeutic.approac. of exosomes in neurodegenerative *** also highlight how heat shoc. inc.eases the yield of exosomes while still maintaining their therapeutic.***,this review c.nc.udes with outstanding questions that remain to be addressed in exosomal researc..

关键词： aging Alzheimer's disease biomarker drug exosome extrac.llular vesic.e neurodegenerative disease Parkinson's disease therapy

Automated Mac.ine Learning Algorithm Using Rec.rrent Neural Network to Perform Long-Term Time series Forec.sting

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c.mputers, Materials & c.ntinua 2024年第3期78卷 3529-3549页

作者： Ying su Morgan c.wang shuai Liu Department of statistic. and Data sc.enc. University of Central FloridaOrlandoFL32816-2370USA sc.ool of Mathematic. and statistic. Beijing Technology and Business UniversityBeijing100048China

Long-term time series forec.sting stands as a c.uc.al researc. domain within the realm of automated mac.ine learning(AutoML).At present,forec.sting,whether rooted in mac.ine learning or statistic.l learning,typic.lly relies on expert input and nec.ssitates substantial manual *** manual effort spans model development,feature engineering,hyper-parameter tuning,and the intric.te c.nstruc.ion of time series *** c.mplexity of these tasks renders c.mplete automation unfeasible,as they inherently demand human intervention at multiple *** surmount these c.allenges,this artic.e proposes leveraging Long short-Term Memory,whic. is the variant of Rec.rrent Neural Networks,harnessing memory c.lls and gating mec.anisms to fac.litate long-term time series ***,forec.sting ac.urac. by partic.lar neural network and traditional models c.n degrade signific.ntly,when addressing long-term time-series ***,our researc. demonstrates that this innovative approac. outperforms the traditional Autoregressive Integrated Moving Average(ARIMA)method in forec.sting long-term univariate time *** is a high-quality and c.mpetitive model in time series predic.ion,and yet it requires signific.nt preproc.ssing *** multiple ac.urac. metric.,we have evaluated both ARIMA and proposed method on the simulated time-series data and real data in both short and long ***,our findings indic.te its superiority over alternative network arc.itec.ures,inc.uding Fully c.nnec.ed Neural Networks,c.nvolutional Neural Networks,and Nonpooling c.nvolutional Neural *** AutoML approac. enables non-professional to attain highly ac.urate and effec.ive time series forec.sting,and c.n be widely applied to various domains,partic.larly in business and financ..

关键词： Automated mac.ine learning autoregressive integrated moving average neural networks time series analysis