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Communications in theoretical Physics 2019年第9期71卷 1127-1138页

作者： B.C.Lütfüoglu A.N.Ikot u.S.Okorie A.t.Ngiangia Department of Physics Faculty of ScienceAkdeniz University07058AntalyaTurkey Department of Physics Faculty of ScienceUniversity of Hradec KraloveRokitanskeho6250003Hradec KraloveCzechia Department of Physics Theoretical Physics GroupUniversity of Port HarcourtChobaPort HarcourtNigeria Department of Physics Akwa Ibom State UniversityIkot AkpadenP.M.B.1167UyoNigeria

In this article, we investigate the bound state solution of the Klein Gordon equation under mixed vector and scalar coupling of an energy-dependent deformed Hulthén potential in D dimensions. We obtain a transcendental equation after we impose the boundary conditions. We calculate energy spectra in four different limits and in arbitrary dimension via the Newton-Raphson method. then, we use a statistical method, namely canonical partition function, and discuss the thermodynamic properties of the system in a comprehensive way. We find out that some of the thermodynamic properties overlap with each other, some of them do not.

关键词： Klein-Gordon equation energy-dependent deformed Hulthén potential energy bound state solution thermodynamic properties

Instanton effects on the heavy-quark static potential

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Chinese Physics C 2017年第8期41卷 19-30页

作者： u.t.Yakhshiev Hyun-Chul Kim B.turimov M.M.Musakhanov Emiko Hiyama Department of Physics Inha UniversityIncheon 22212Republic of Korea RIKEN Nishina Center RIKEN2-1 Hirosawa351-0115 SaitamaJapan School of Physics Korea Institute for Advanced Study(KIAS)Seoul 02455Republic of Korea theoretical Physics Department National University of UzbekistanTashkent-174Uzbekistan

We investigate instanton effects on the heavy-quark potential, including its spin-dependent part, based on the instanton liquid model. Starting with the central potential derived from the instanton vacuum, we obtain the spin-dependent part of the heavy-quark potential. We discuss the results of the heavy-quark potential from the instanton vacuum. Finally, we solve the nonrelativistic two-body problem, associated with the heavy-quark potential from the instanton vacuum. the instanton effects on the quarkonia spectra are marginal but are required for quantitative description of the spectra.

关键词： instanton-induced interactions heavy-quark potential quarkonia

Photoproduction of multi-meson final states–recent results from the Crystal-Barrel/tAPS experiment at ELSA-

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Chinese Physics C 2009年第12期33卷 1105-1112页

作者： u. thoma HISKP Universitt Bonn Nussallee 14-16 53115 Bonn Germany

Multi-meson final states such as γp →pπ0π0 and γp →pπ0η have been investigated with the Crystal-Barrel/tAPS experiment at ELSA. Baryon cascades via △π and △η and also via higher mass baryon resonances are clearly observed. Based on this data and on data from other reactions a partial wave analysis has been performed from which partial decay widths of various N＊ and △＊ states into the different pπ0π0 and pπ0η decay channels have been determined, leading partly to unexpected results. In addition, polarisation observables have been investigated. the beam asymmetry X has been determined for both reactions and double polarisation data using a longitudinally polarised target and a circularly or linearly polarised photon beam has been taken. Given the angular coverage of the Crystal-Baxrel/tAPS experiment this data covers almost the full angular range and phase space. this data will provide new and important information for the partial wave analyses and bring us one step closer towards a complete experiment.

关键词： baryon spectroscopy photoproduction multi-meson final states polarisation observables

Impact of Radiation and Slip on Newtonian Liquid Flow Past a Porous Stretching/Shrinking Sheet in the Presence of Carbon Nanotubes

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Fluid Dynamics & Materials Processing 2023年第4期19卷 929-939页

作者： u.S.Mahabaleshwar t.Anusha M.EL Ganaoui R.Bennacer Department of Mathematics Davangere UniversityShivagangothriDavangere577007India Institut universitaire de technologie de Longwy Universitéde Lorraine186 rue de LorraineCosnes et Romain54400France LMt/ENS-Cachan/CNRS/universitéParis Saclay Cachan94235France

the impacts of radiation,mass transpiration,and volume fraction of carbon nanotubes on the flow of a Newtonian fluid past a porous stretching/shrinking sheet are *** this purpose,three types of base liquids are considered,namely,water,ethylene glycol and engine ***,single and multi-wall carbon nanotubes are examined in the *** overall physical problem is modeled using a system of highly nonlinear partial differential equations,which are then converted into highly nonlinear third order ordinary differential equations via a suitable similarity *** equations are solved analytically along with the corresponding boundary *** is found that the carbon nanotubes can significantly improve the heat transfer *** potential application in cutting-edge areas is also discussed to a certain extent.

关键词： Carbon nanotubes porous media newtonian fluid radiation

Drilling study on lightweight structural Mg/SiC composite for defence applications

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Defence technology（防务技术） 2019年第4期15卷 557-564页

作者： K. Balamurugan M. uthayakumar S. thirumalai Kumaran G.S. Samy u.t.S. Pillai Department of Mechanical Engineering VFSTR (Deemed to be University) Guntur 522213 India Faculty of Mechanical Engineering Kalasalingam University Krishnankoil 626126 Tamil Nadu India CSIR-NIISt Material Science and Technology Division Thiruvananthapuram 695019 India

Heat energy generated during machining has been found to have a greater influence on determining the machinability of the *** this work,magnesium-based silicon carbide composite,which has been identified as a suitable lightweight application material,is prepared with the weight ratio of 90:10 by a stir casting *** available HSS drill tools with different diameters of 4,6 and 8 mm are used to perform the drilling operations with governing parameters of spindle speed,feed rate and constant depth of *** image camera of the FLIR E60 series is used to measure the temperature variation in the cutting zone at different operating *** influences of machining temperature on chip morphology,tool wear and surface profile of the machined samples are *** speed has been found to have a significant effect on machining *** spindle speed increases,the diameter of drill tool increases the tool wear and surface profile,*** abrasion and adhesive type of wears are observed in the drill ***,change from abrasion to adhesive wear is noticed with the increase of the diameter of the drill *** plots are drawn with respect to the interaction of governing parameters along with the working temperatures obtained under different machining conditions.

关键词： Magnesium SiC Drilling thermal effect Chip morphology tool wear

CONVERGENCE OF LOGARItHMIC MEANS OF MuLtIPLE WALSH-FOuRIER SERIES

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Analysis in theory and Applications 2005年第4期21卷 326-338页

作者： G.Gát u.Goginava G.tkebuchava College of Nyíregyháza Hungary tbilisi State university Georgia

Norlund logarithmic means of multiple Walsh-Fourier series acting from space L In^d-1 L （[0, 1）d）, d≥1 into space weak - LI（[0,1）^d） are studied. the maximal Orlicz space such that the Norlund logarithmic means... 详细信息

关键词： Multiple Walsh-Fourier series convergence in metric and in measure Norlund means

Improving the photocatalytic performance of tiO2 via hybridizing with graphene

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Journal of Semiconductors 2017年第6期38卷 24-31页

作者： K S Divya Athulya K Madhu t u umadevi t Suprabha P.Radhakrishnan Nair Suresh Mathew School of Chemical Sciences Mahatma Gandhi University Kottayam 686 560 Kerala India Advanced Molecular Materials Research Centre Mahatma Gandhi University Kottayam 686 560 Kerala India

In this paper an improvement in the photocatalytic performance of tiO2 was carried out via hybridizing with ***-tiO2（GR-tiO2/nanocomposites with different weight addition ratios of graphene oxide（GO）have been prepared via a facile microwave irradiation of GO and tetrabutyl titanate in isopropyl *** spectroscopy（RS）,X-ray diffraction（XRD）,scanning electron microscopy（SEM）,transmission electron microscopy（tEM）,uV–visible spectroscopy（uV–vis）,Fourier transform infrared spectra（FtIR）,energy dispersive X-ray spectroscopy（EDX）and photoluminescence spectra（PL）are employed to determine the properties of the *** irradiation can heat the reactant to a higher temperature in a short time,simultaneously GO is reduced to graphene and tiO2 nanoparticles grown on the surface of ***-tiO2 nanocomposites synthesized via this approach have efficient electron conductivity in GR,resulting in a reduced electron–hole recombination *** the synthesized nanocomposites,Gt-8wt% exhibited the best photocatalytic activity toward photocatalytic degradation of *** current work provides a new insight for the fabrication of GR-tiO2 nanocomposites within a short reaction time and also explains the mechanism of photocatalysis employing radical and hole scavengers.

关键词： graphene (GR) tetrabutyl titanate (tBt) GR-tiO2 nanocomposites methylene blue photocatalysis

Synthesis and Crystal Structure of trans-bis(acesulfamato-O)tetraaquazinc(Ⅱ)

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Chinese Journal of Structural Chemistry 2010年第7期29卷 1047-1050页

作者： SAHIN Onur ICBuDAK Hasan B(u|¨)Y(u|¨)KG(u|¨)NG(O|¨)R Orhan Department of Physics Faculty of Arts and SciencesOndokuz Mayis UniversitySamsunTurkey Department of Chemistry Faculty of Arts and SciencesOndokuz Mayis UniversitySamsunTurkey

the title compound, trans-bis（acesulfamato-O）tetraaquazinc（Ⅱ）（I, C8H16N2O12S2Zn）, crystallizes in the triclinic system, space group P1 with a = 5.1638（5）, b = 8.5338（9）, c = 9.9583（9）A, α = 74.325（8）, β = 81.112（7）, γ = 75.800（8）°, V= 407.77（7） A3, Z = 1, F（000） = 236, Rint = 0.085, t= 296 K, the final R = 0.029 and wR = 0.078 for 1832 observed reflections with I〉 2σ（0. the ZnⅡcentre resides on a centre of symmetry and has a distorted octahedral geometry. the basal plane is defined by two carbonyl O atoms of two monodentate trans-oriented acesulfamato ligands and two trans-aqua ligands. the axial positions in the octahedron are occupied by two trans-aqua ligands. Intermolecular O-H…O hydrogen bonds produce R22（8） and R22（16） rings, which lead to two- dimensional polymeric chains.

关键词： crystal structure zinc(Ⅱ) octahedral complex hydrogen bonds

Identification of expected seismic activity areas by forecasting complex seismic-mode parameters in uzbekistan

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Geodesy and Geodynamics 2018年第2期9卷 121-130页

作者： t.u.Artikov R.S.Ibragimov t.L.Ibragimova M.A.Mirzaev Institute of Seismology

In this paper, the author proposed a methodology to reveal expected seismic activation places for coming years by a complex of forecasting parameters of a seismic mode. Areas in uzbekistan where currently observed anomalies in various parameters of a seismic mode has been revealed. By number of displayed abnormal signs the areas has been ranked based on probability of occurrence of strong earthquakes there. It has prepared schemes of the synoptic forecast of expected seismic activation places in case of occurrence of strong earthquakes in the Central-Asian region.

关键词： Long-term forecast of earthquakes Parameters of seismic mode Seismic activity Seismic gap

Study of modern seismic zoning maps'accuracy(case for Eastern uzbekistan)

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Geodesy and Geodynamics 2016年第6期7卷 416-424页

作者： t.u.Artikov R.S.Ibragimov t.L.Ibragimova M.A.Mirzaev Institute of Seismology Academy of Science of the Republic of UzbekistanTashkentUzbekistan

Influence of uncertainty factors of input parameters on results of the estimation of seismic hazard has been researched. It is found that the largest deviations, from seismic hazard maps designed on the basis of average values of distribution of seismic mode and seismic load parameters, may arise due to the imprecise depth of earthquake sources （H）, uncertain estimations of seismic potential and slope of recurrence curve （v）. the contribution of such uncertainty factors, like imprecise definition of seismic activity Alo, incorrect choice of prevailing type of a motion in the source, using regional laws of attenuation of seismic load intensity in distance instead of local once are substantially small. For Eastern uzbekistan, it was designed the seismic hazard map with the highest value which takes into account every possible factors of uncertainty in parameters of seismic mode and seismic load.

关键词： Seismic hazardSeismic potentialSeismic activitySeismic intensitySeismic zoningSeismic sources