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a.proxima.ions of the Fra.tiona. Integra. a.d Numerica. Solutions of Fra.tiona. Integra. Equa.ions

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Communica.ions on a.plied Ma.hema.ics a.d Computa.ion 2021年第3期3卷 545-569页

作者： yuri Dimitrov Depa.tment of Ma.hema.ics a.d Physics University of Forestry1756 SofiaBulgaria Institute of Ma.hema.ics a.d Informa.ics Bulgarian Academy of Sciences1113 SofiaBulgaria

In the present pa.er,we derive the a.ymptotic expa.sion formula.for the tra.ezoida. a.proxima.ion of the fra.tiona. *** use the expa.sion formula.to obta.n a.proxima.ions for the fra.tiona. integra. of ordersα,1+α,2+α,3+αa.d 4+α.The a.proxima.ions a.e a.plied for computa.ion of the numerica. solutions of the ordina.y fra.tiona. rela.a.ion a.d the fra.tiona. oscilla.ion equa.ions expressed a. fra.tiona. integra. equa.ions.

关键词： Fra.tiona. integra. Tra.ezoida. a.proxima.ion Fra.tiona. integra. equa.ion Finite-difference scheme

Strengthening of tungsten by coherent rhenium precipita.es formed during low fluence irra.ia.ion

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Tungsten 2022年第1期4卷 20-27页

作者： yuri Osetsky Ma.eria.s Science a.d Technology Division Oak Ridge National LaboratoryOak RidgeTN 37831USA

Experimenta. da.a.show tha. the a.cumula.ion of rhenium a.d osmium from tra.smuta.ion rea.tions severely a.fect the microstructura. evolution a.d property degra.a.ion of tungsten-ba.ed ma.eria.s under neutron *** a.d modeling ha.e confirmed tha. Re a.om tra.sport in W is by irra.ia.ion-produced migra.ing self-interstitia. *** this diffusion mode in opera.ion,a.specific microstructure evolution is rea.ized when a. rela.ively low neutron fluence the Re-rich precipita.es a.e formed,while the void a.d interstitia. loop popula.ion development is suppressed,a.fecting the mecha.ica. *** resea.ch shows the effect of sma.l coherent Re-rich precipita.es on the disloca.ion glide under stress,investiga.ed using the molecula. dyna.ics a.proa.h with empirica. intera.omic *** results a.e compa.ed with a. ea.lier simula.ion of void ha.dening in *** is demonstra.ed tha. sma.l coherent Re-rich precipita.es of less tha. 6 nm dia.eter represent rela.ively wea. obsta.les for moving edge *** implica.ion of these results on the interpreta.ion of experimenta. results is discussed.

关键词： Tungsten-rhenium a.loys Molecula. dyna.ics Re-rich precipita.es Disloca.ion obsta.le intera.tion Disloca.ion dyna.ics Obsta.le strength

a.ta.hment a.ility of combined biomimetic a.hesive micro-textures of different sha.es

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Friction 2023年第8期11卷 1430-1441页

作者： Da.id Ba.LER yuri KLIGERMa. Ha.ta. Ka.EM Fa.ulty of Mecha.ica. Engineering Technion-Israel Institute of TechnologyHaifa 3200003Israel Depa.tment of Mecha.ica. Engineering Azrieli College of EngineeringJerusalem 9103501Israel

There a.e va.ious potentia. a.plica.ions of biomimetic a.hesive solutions including climbing robotic systems,mobile sensor pla.forms,a.d biomedica. a.plica.ions such a. pa.ches for externa. *** resista.ce to both norma. a.d ta.gentia. loa.s,however,is a.critica. issue tha. still needs to be *** a.ima.s ha.e developed exceptiona. a.ta.hment mecha.isms ba.ed on combined fibrilla. elements of different sha.es a.d *** investiga.ion of combined biomimetic a.hesive micro-textures on tribologica. performa.ces such a. a.hesion,friction,a.d peeling resista.ce is needed to a.ply this idea.to the design of a. a.tificia. texture ha.ing simila.“biomimetic”*** the present study,we demonstra.e tha. combina.ions of different sha.es of biomimetic a.hesive micro-textures show increa.ed efficiency under different conta.t environments a.d ena.le long-term a.hesive *** work sheds light on combina.ions of different element sha.es inspired by na.ure a.d their a.hesive efficiency a. a.function of the ra.io of ea.h biomimetic element,a. well a. their spa.ia. repa.tition.

关键词： biomimetic micro-textures a.hesion friction peeling

Electric resistivity of pa.tia.ly ionized pla.ma.in the lower sola. a.mosphere

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Resea.ch in a.tronomy a.d a.trophysics 2021年第9期21卷 193-201页

作者： Jongchul Cha. yuri ELitvinenko a.tronomy Progra. Department of Physics and AstronomySeoul National UniversitySeoul 08826Korea Depa.tment of Ma.hema.ics University of WaikatoP.B.3105Hamilton 3240New Zealand

The lower sola. a.mosphere is a.gra.ita.iona.ly stra.ified la.er of pa.tia.ly ionized *** ca.cula.e the electric resistivity in the sola. photosphere a.d chromosphere,which is the key pa.a.eter tha. controls the ra.e of ma.netic reconnection in a.Sweet-Pa.ker current *** ca.cula.ion ta.es into a.count the collisions between ions a.d hydrogen a.oms a. well a. the electron-ion collisions a.d the electron-hydrogen a.om *** find tha. under the typica. conditions of the quiet Sun,electric resistivity is determined mostly by the electron-hydrogen a.om collisions in the photosphere,a.d mostly by the ion-hydrogen collisions,*** diffusion,in the *** ma.netic reconnection events with strong ma.netic fields,the a.bipola. diffusion,however,ma. be insignifica.t beca.se the hea.ing by the reconnection itself ma. lea. to the full ioniza.ion of hydrogen *** conclude tha. a.bipola. diffusion ma. be the most importa.t source of electric resistivity responsible for the ma.netic flux ca.cela.ion a.d energy relea.e in chromospheric current sheets tha. ca. keep a.significa.t fra.tion of neutra. hydrogen a.oms.

关键词： pla.ma. a.omic processes ma.netohydrodyna.ics(MHD) Sun:a.mosphere Sun:chromosphere

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Seeing is believing

Light(Science & a.plica.ions) 2022年第3期11卷 6-7页

作者： Sergey Kra.ikov yuri Kivsha. Nonlinea. Physics Center Research School of PhysicsAustralian National UniversityCanberra ACT 2601Australia and School of Physics and EngineeringITMO UniversitySt.Petersburg197101Russia

Bound sta.es in the continuum a.e rea.ized in ma.y optica. systems a.“da.k sta.es”,a.d their presence ca. be detected in the regime of lea.y modes via.resona.ces in *** the a.thors revea. previously unseen structure... 详细信息

关键词： sta.es dielectric continuum

a.r qua.ity short-term control in a. industria. region under a.verse wea.her conditions

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Control Theory a.d Technology 2020年第3期18卷 257-268页

作者： yuri SKIBa.Da.id Pa.Ra.CUEVa.A Center for a.mospheric Sciences National Autonomous University of MexicoCircuito ExteriorCiudad UniversitariaCDMX04510Mexico

a.new short-term optima. control of a.r qua.ity in a. industria. region during a.mospheric inversions is *** goa. is to prevent viola.ion of hea.th sta.da.d of a.r qua.ity in a.few monitored *** control esta.lishes restrictions on the emission ra.es of industria. sources a.d includes the identifica.ion of the industria. sources viola.ing(exceeding)the emission ra.es set by the *** control a.d identifica.ion a.e ba.ed on using solutions to a. a.joint dispersion *** tha. show the convergence of the emission ra.es,prescribed by the control,to the origina. emission ra.es of the industria. sources a.e given(Theorems 4 a.d 5).These results ensure tha. the new emission ra.es of industria. sources(esta.lished by the control)will be a. close a. possible to the origina. emission ra.es throughout the entire period of a.plica.ion of the *** crea.es the minimum possible restrictions on the functioning of industria. *** highlight of the new control is the possibility of selecting specia. weights for ea.h pollution source in the goa. function tha. is *** weights a.e ma.nly a.med a. reducing the intensity of emissions of the ma.n sources of *** exa.ple demonstra.es the a.ility of the new method.a.simila. a.proa.h ca. a.so be used to develop methods for clea.ing wa.er zones polluted by oil(the problem of bioremedia.ion),a.d to prevent excessive pollution of urba. a.ea. with a.tomobile emissions.

关键词： Dispersion model a.joint model a.joint estima.es optima. control source detection

Meta.optics a.d bound sta.es in the continuum

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Science Bulletin 2019年第12期64卷 836-842页

作者： Kirill koshelev a.drey Bogda.ov yuri Kivsha. Nonlinea. Physics Centre Australian National UniversityCanberra ACT 2601Australia ITMO University St. Petersburg 197101Russia

We discuss the recent a.va.ces in meta.optics a.d na.ophotonics a.socia.ed with the physics of bound sta.es in the continuum(BICs). Such resona.t sta.es a.pea. due to a.strong coupling between lea.y modes in optica. guiding structures being supported by subwa.elength high-index dielectric Mieresona.t na.oa.tenna. or a.l-dielectric meta.urfa.es. First, we review briefly very recent developments in the BIC physics in a.plica.ion to isola.ed subwa.elength pa.ticles. We pa. a.specia. a.tention to novel opportunities for nonlinea. na.ophotonics due to the la.ge field enha.cement inside the pa.ticle volume crea.ing the resona.t sta.es with high-qua.ity(high-Q) fa.tors, the so-ca.led qua.i-BIC, tha. ca. be supported by the subwa.elength pa.ticles. Second, we discuss novel a.plica.ions of the BIC physics to a.ldielectric optica. meta.urfa.es with broken-symmetry meta.a.oms when tuning to the BIC conditions a.lows to enha.ce substa.tia.ly the Q fa.tor of the fla.-optics dielectric structures. We a.so present the origina. results on nonlinea. high-Q meta.urfa.es a.d predict tha. the frequency conversion efficiency ca. be boosted dra.a.ica.ly by sma.t engineering of the a.ymmetry pa.a.eter of dielectric meta.urfa.es in the vicinity of the qua.i-BIC regime.

关键词： Bound sta.es in the continuum Meta.optics Second-ha.monic genera.ion Na.oresona.or Meta.urfa.es

a.oustics of a.viscoela.tic medium with enca.sula.ed bubbles

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Journa. of Hydrodyna.ics 2021年第1期33卷 55-62页

作者： Da.ir a.Guba.dullin yuri V.Fedorov La.ora.ory of Continuum Mecha.ics Institute of Mechanics and EngineeringFRC Kazan Scientific CenterRussian Academy of SciencesKazanRussia

In this pa.er,a.modified Ra.leigh-La.b equa.ion is derived tha. ta.es into a.count the ra.ia. vibra.ions of a.ga. bubble coa.ed with a.viscoela.tic shell a.d loca.ed in a. ela.tic *** sma.l oscilla.ions of inclusion,the problem of hea. excha.ge between a.ga.,a.liquid pha.e,a.viscoela.tic shell,a.d a. ela.tic medium is *** energy integra. is *** the ca.e of sma.l disturba.ces,the dispersion rela.ion is found from the Ra.leigh-La.b equa.ions,energy,a.d the known wa.e equa.ion for the bubbly *** a.a.ytica. expression of the equilibrium speed of sound is written out a.d its dependence on the size of the viscoela.tic shell a.d the disturba.ce frequency is *** exa.ple of a.mixture of polydimethylsiloxa.e with a.r bubbles coa.ed with a.rubber shell illustra.es the influence of the ela.ticity of the ca.rier medium a.d the shell of the bubbles on the dependence of the pha.e velocity a.d a.tenua.ion coefficient on the perturba.ion *** a.mixture of wa.er with a.r bubbles coa.ed with a.rubber shell,the influence of the dependences of the shea. modulus a.d viscosity of butyl rubber on the frequency of disturba.ces a. different tempera.ure on the dispersion curves is shown.a.compa.ison of the theory with experimenta. da.a.is given.

关键词： a.oustic wa.e ga. bubbles viscoela.tic medium a.d shell shea. modulus dispersion equa.ion

Intra.olecula. C→N 1,3-Migra.ion of a.koxyca.bonyl or a.etyl Group-a.plica.ions, Limita.ions a.d Mecha.ism

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Chinese Journa. of Chemistry 2005年第8期23卷 1103-1105页

作者： GOLOLOBOV, yuri G. a. N. Nesmeya.ov Institute of Orga.oelement Compounds Russian Academy of Sciences 28 ul. Vavilova 119991 Moscow Russia

a.new type of intra.olecula. electrophilic rea.ra.gements involving the shift of a.koxyca.bonyl or a.etyl groups from a.ca.bon a.om to a. N-a.ionic center is presented.

关键词： intra.olecula. rea.ra.gement a.koxyca.bonyl a.etyl