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Modelling of nanostructured TiO_2-based memristors

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Journal of semiconductors 2015年第3期36卷 52-54页

作者： s.s.shinde T.d.dongle shivaji University Korea Research Institute of standards and science

The fourth fundamental circuit element memristor completes the missing link between charge and mag- netic flux. It consists of the function of the resistor as well as memory in nonlinear fashion. The property of the memristor depends on the magnitude and direction of applied potential. This unique property makes it the primi- tive building block for many applications such as resistive memories, soft computing, neuromorphic systems and chaotic circuits etc. In this paper we report TiO2-based nanostructured memristor modelling. The present memris- tor model is constructed in MATLAB environment with consideration of the linear drift model of memristor. The result obtained from the linear drift model is well matched with earlier reported results by other research groups.

关键词： memristor linear drift model TiO2

Titanium Technology in the UsA - an Overview

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Journal of Materials science & Technology 2001年第4期17卷 439-443页

作者： d.Eylon s.R.seagle GraduateMaterialsEngineering UniversityofDaytonDaytonOhio45469USA Consultant 60HeronCircleCortlandOH44410USA

The state of Ti research, development and industry is reviewed in this article. The fifty-year anniversary of Ti technology commercialization in the UsA provides an opportunity for a historical perspective. Incorporation of 'information-age' tools into alloy development, processing, and production invigorates the technology. Consolidation, diversification and globalization have been transforming the Ti industry in the recent years.

关键词： Titanium

Co-evolution of nuclear rings,bars and the central intensity ratio of their host galaxies

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Research in Astronomy and Astrophysics 2020年第2期20卷 15-20页

作者： s.Aswathy C.d.Ravikumar department of Physics University of Calicut

Using a sample of 13 early-type spiral galaxies hosting nuclear rings,we report remarkable correlations between the properties of the nuclear rings and the central intensity ratio(CIR) of their host *** CIR,a function of intensity of light within the central 1.5 and 3 arcsec region,is found to be a vital parameter in galaxy evolution,as it shares strong correlations with many structural and dynamical properties of early-type galaxies,including mass of the central supermassive black hole(sMBH).We use archival HsT images for aperture photometry at the centre of the galaxy image to compute the *** observe that the relative sizes of nuclear rings and ring cluster surface densities strongly correlate with the *** correlations suggest reduced star formation in the centres of galaxies hosting small and dense nuclear *** scenario appears to be a consequence of strong bars as advocated by the significant connection observed between the CIR and bar *** addition,we observe that the CIR is closely related with the integrated properties of the stellar population in the nuclear rings,associating the rings hosting older and less massive star clusters with low values of ***,the CIR can serve as a crucial parameter in unfolding the coupled evolution of bars and rings as it is intimately connected with both their properties.

关键词： galaxies:evolution galaxies:formation galaxies:photometry galaxies:spiral galaxies:starburst

Interacting tachyonic scalar field

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Communications in Theoretical Physics 2021年第2期73卷 102-107页

作者： A Kundu s d Pathak V K Ojha department of Physies Lovely Professional UniversityPhagwaraPunjab144411India school of sciences SAGE University BhopalMadhya Pradesh462022India

We discuss the coupling between dark energy and matter by considering a homogeneous tachyonic scalar field as a candidate for dark *** obtained the functional form of scale factor by assuming that the coupling strength depends linearly on the Hubble parameter and energy *** also estimated the cosmic age of the Universe for different values of coupling constant.

关键词： dark energy dark matter scalar field achyonic scalar field

Optical theorem,crossing property,and derivative dispersion relations:implications on the asymptotic behavior of σ_(tot)(s) and ρ(s)

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Chinese Physics C 2022年第8期46卷 72-90页

作者： s.d.Campos V.A.Okorokov Applied Mathematics Laboratory-CCTs/dFQM Federal University of São CarlosSorocaba CEP 18052-780Brazil Moscow Engineering Physics Institute National Research Nuclear University MEPhI115409 MoscowRussia

In this paper,we present some results on the behavior of the total cross section and p-parameter at asymptotic energies in proton-proton(pp) and antiproton-proton(pp) ***,we consider three of the main theoretical results in high energy physics:the crossing property,derivative dispersion relation,and optical *** use of such machinery facilitates the derivation of analytic formulas for a wide set of the measured global scattering parameters and some important relations between *** suggested parameterizations approximate the energy dependence for the total cross section and ρ-parameter for pp and pp with a statistically acceptable quality in the multi-TeV ***,the qualitative description is obtained for important interrelations,namely difference,sum,and ratio of the antiparticle-particle and particle-particle total cross *** the reduced number of experimental data for the total cross section and p-parameter at the TeV-scale,which complicates any prediction for the beginning of the asymptotic domain,the fitting procedures indicates that asymptotia occur in the energy range 25.5-130 ***,in the asymptotic regime,we obtain α_(P)=1.A detailed quantitative study of the energy behavior of the measured scattering parameters and their combinations in the ultra-high energy domain indicates that the scenario with the generalized formulation of the Pomeranchuk theorem is more favorable with respect to the original formulation of this theorem.

关键词： optical theorem derivative dispersion relations asymptotic behavior Pomeranchuk theorem

The sharma-Tasso-Olver-Burgers equation:its conservation laws and kink solitons

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Communications in Theoretical Physics 2022年第2期74卷 1-8页

作者： K Hosseini A Akbulut d Baleanu s salahshour department of Mathematics Near East University TRNCMersin 10Turkey department of Mathematics-Computer Art-Science FacultyEskisehir Osmangazi UniversityEskisehirTurkey department of Mathematics Faculty of Arts and SciencesCankaya UniversityAnkara 06530Turkey Institute of space sciences Magurele-BucharestRomania Faculty of Engineering and Natural sciences Bahcesehir UniversityIstanbulTurkey

The present paper deals with the sharma-Tasso-Olver-Burgers equation(sTOBE)and its conservation laws and kink *** precisely,the formal Lagrangian,Lie symmetries,and adjoint equations of the sTOBE are firstly constructed to retrieve its conservation *** solitons of the sTOBE are then extracted through adopting a series of newly well-designed approaches such as Kudryashov and exponential *** graphs in 2 and 3d postures are formally portrayed to reveal the dynamical features of kink *** to the authors’knowledge,the outcomes of the current investigation are new and have been listed for the first time.

关键词： sharma-Tasso-Olver-Burgers equation conservation laws Kudryashov and exponential methods kink solitons dynamical features

Charge self-trapping in two strand biomolecules:Adiabatic polaron approach

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Chinese Physics B 2023年第1期32卷 253-263页

作者： d Chevizovich s Zdravković A V Chizhov Z Ivić University of Belgrade Vinča Institute of Nuclear SciencesP.O.Box 522Belgrade 11001Serbia Joint Institute for Nuclear Research Laboratory for Radiation BiologyDubna 141980Russia dubna state University Dubna 141980Russia department of Physics University of CreteP.O.Box 2208Heraklion 71003Greece National University of science and Technology MIsis Leninsky prosp.4Moscow 119049Russia

We investigate the properties of the excess charge(electron, hole) introduced into a two-strand biomolecule. We consider the possibility that the stable soliton excitation can be formed due to interaction of excess charge with the phonon subsystem. The influence of overlap of the molecular orbitals between adjacent structure elements of the macromolecular chain on the soliton properties is discussed. special attention is paid to the influence of the overlapping of the molecular orbitals between structure elements placed on the different chains. Using the literature values of the basic energy parameters of the two-chain biomolecular structures, possible types of soliton solutions are discussed.

关键词： charge self-trapping adiabatic polaron soliton two-stranded biomolecules

Effects of bottom shear stresses on the wave-induced dynamic response in a porous seabed:PORO-WssI (shear) model

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Acta Mechanica sinica 2011年第6期27卷 898-910页

作者： J.Ye d.-s.Jeng division of Civil Engineering University of Dundee Center for Marine Geotechnical Engineering State Key Laboratory of Ocean EngineeringShanghai Jiao Tong University

When ocean waves propagate over the sea floor,dynamic wave pressures and bottom shear stresses exert on the surface of *** bottom shear stresses provide a horizontal loading in the wave-seabed interaction system,while dynamic wave pressures provide a vertical loading in the ***,the bottom shear stresses have been ignored in most previous studies in the *** this study,the effects of the bottom shear stresses on the dynamic response in a seabed of finite thickness under wave loading will be examined,based on Biot＇s dynamic poro-elastic *** the model,an ＂u-p＂ approximation will be adopted instead of quasi-static model that have been used in most previous *** results indicate that the bottom shear stresses has certain influences on the wave-induced seabed dynamic ***,wave and soil characteristics have considerable influences on the relative difference of seabed response between the previous model（without shear stresses） and the present model（with shear stresses）.As shown in the parametric study,the relative differences between two models could up to 10% of p0,depending on the amplitude of bottom shear stresses.

关键词： Bottom shear stresses Wave-induced dynamicresponse Porous seabed - "u-p" approximation - Biot's the-ory

Notch severity Effect on Hydrogen Embrittlement of Type 4340 steel

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Journal of Materials science & Technology 1996年第1期12卷 51-56页

作者： Liu, s Zhu, ZY Ke, W Hardie, d UNIV NEWCAsTLE UPON TYNE DEPT MECH MAT & MFG ENGNNEWCASTLE TYNE TE1 7RUTYNE & WEARENGLAND

Hydrogen embrittlement of Type 4340 steel has been investigated by straining round-notched specimens in 10(5) Pa hydrogen atmosphere at a constent cross-head spead of 1.4x10(-4) mm/s. The circumferentially notched specimens exhibited a significant embrittlement when their mechanical behaviour in hydrogen was compared with that in air. Although the effect of notch depth on fracture strength in air is negligible, an increase in the depth of notch increase susceptibility to embrittlement when testing in gaseous hydrogen. However, analysis of the effects is complicated by the facts that (i) the specimens show some degree of notch severity even when strained in air and (ii) the behaviour is complicated by the localised plastic deformation that may occur for relatively shallow notches. such effects are eliminated at high stress concentration factors, so there is a systematic loss in fracture stress in hydrogen as the notch sensitivity increases from K-t=2.6 to 5.7 (where a 87% reduction of fracture stress occurs) but a relatively stable value is then reached even for very severe notching by fatigue pre-cracking. Whether or not the effect is due to increasing concentration of hydrogen in the triaxial stress region ahead of the notch, there is no doubt that increasing the stress concentration makes hydrogen more effective as an embrittlement agent.

关键词： Carbon steel