检索结果-南通市图书馆

PROPERTIES OF SOME SETS OF SEQUENCES DEFINED BY A MODULUS FUNCTION

在线全文

学校读者我要写书评

暂无评论

Acta Mathematica Scientia 2009年第2期29卷 427-434页

作者： yavuz Altin Department of Mathematics Firat University

In this article, the author introduces the generalized difference paranormed sequence spaces c （△v^m, f, p, q, s）, c0 （△v^m, f, p, q, s）, and l∞ （△v^m, f, p, q, s） defined over a seminormed sequence space （... 详细信息

关键词： Difference sequence modulus function seminorm

The REE Characteristics of Oil Shales in the Lower Eocene Celtek Formation (Yozgat,Turkey) and their Relation to Tectonic Provenance

在线全文

学校读者我要写书评

暂无评论

Acta Geologica Sinica(English Edition) 2019年第3期93卷 604-621页

作者： yavuz PEHLIVANLI Berna Department of Geological Engineering Bozok University

The Lower Eocene Celtek Formation is located in the Sorgun district of thecity of Yozgat in *** the study area,Paleozoic,Campanian-Maastrichtian,Eocene,Miocene and Quaternary units are *** Celtek Formation is noteworthy with its coal and oil shale *** were collected from one exposure(YCOSK)and two boreholes(SJ and C boreholes)at the facility operated by the Yeni Celtek Coal *** of REE in oil shales from these localities were determined using the ICP-MS *** and total organic carbon(TOC)values of a total of 32 samples were compared with normalized REE contents of various *** contents of the samples ranged from 1.37wt%to 11.8wt%(mean 4.96wt%).The averages of all samples for the all normalized values show similar *** REE patterns are represented by the enrichment in the order of LREE>MREE>HREE and display negative Ce and positive Eu anomalies.ΣREE *** were compared.ΣREE *** showed a weak positive correlation,whereasΣLREE vs.(M+HREE)andΣLREE vs.ΣREE were positively *** tectonic provenance characteristics,the Celtek Formation oil shales were formed in microenvironments with physicochemical conditions changing in character from oxic to euxinic,representing a transitional terrestrial–marine environment.

关键词： rare earth element geochemistry Ce anomaly Eu anomaly tectonic provenance Celtek Formation oil shale Sorgun(Yozgat) Turkey

Aerodynamics of non-slender delta and reverse delta wings:Wing thickness,anhedral angle and cropping ratio

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Aeronautics 2023年第4期36卷 79-91页

作者： Göktug KOCAK Mehmet Metin yavuz Turkish Aerospace Industries Inc.Aerodynamics Chief Engineer at TF-XProjectAnkara 06980Turkey Mechanical Engineering Department Middle East Technical UniversityAnkara 06800Turkey

The effects of thickness-to-chord(t=c)ratio,anhedral angle(d),and cropping ratio from trailing-edge(Cr%)on the aerodynamics of non-slender reverse delta wings in comparison to non-slender delta wings with sweep angle of 45°were characterized in a low-speed wind tunnel using force and pressure *** measurements were conducted for total of 8 different delta and reverse delta *** different t/c ratios of 5.9%and 1.1%,and two different anhedral angles ofd=15°and 30°for non-cropped and cropped at Cr=30%conditions were *** results indicate that the reverse delta wings generate higher lift-to-drag ratio and have better longitudinal static stability characteristics compared to the delta *** wing thickness has favorable effect on longitudinal static stability for the reverse delta wing whereas longitudinal static stability is not influenced by wing thickness for the delta *** reverse delta wings,the anhe-draled wing without cropping has adverse effect on aerodynamic performance and decreases the lift-to-drag *** in anhedraled wing causes significant improvement in lift-to-drag ratio,shift in aerodynamic and pressure centers towards the trailing-edge,and enhancement in longitudi-nal static stability.

关键词： Aerodynamic coefficients Anhedral Cropping Leading-edge vortex Longitudinal static stability Non-slender delta wing Non-slender reverse delta wing Stall Three-dimensional surface separation

Model Predictive Control Coupled with Artificial Intelligence for Eddy Current Dynamometers

在线全文

学校读者我要写书评

暂无评论

Computer Systems Science & Engineering 2023年第1期44卷 221-234页

作者： İhsan Uluocak Hakan yavuz Çukurova University Ceyhan Engineering FacultyMechanical Engineering DepartmentAdanaTurkey Çukurova University Faculty of EngineeringMechanical Engineering DepartmentAdanaTurkey

The recent studies on Artificial Intelligence(AI)accompanied by enhanced computing capabilities supports increasing attention into traditional control methods coupled with AI learning methods in an attempt to bringing adap-tiveness and fast responding *** Model Predictive Control(MPC)tech-nique is a widely used,safe and reliable control method based on *** the other hand,the Eddy Current dynamometers are highly nonlinear braking sys-tems whose performance parameters are related to many processes related *** study is based on an adaptive model predictive control that utilizes selected AI *** presented approach presents an updated the mathema-tical model of an Eddy Current Dynamometer based on experimentally obtained system operational ***,the comparison of AI methods and related learn-ing performances based on the assessment technique of mean absolute percentage error(MAPE)issues are *** results indicate that Single Hidden Layer Neural Network(SHLNN),General Regression Neural Network(GRNN),Radial Basis Network(RBNN),Neuro Fuzzy Network(ANFIS)coupled MPC have quite satisfying *** presented results indicate that,amongst them,GRNN appears to provide the best performance.

关键词： Model predictive control eddy current dynamometer artificial intelligence GRNN RBNN ANFIS

Fundamental calculus of the fractional derivative defined with Rabotnov exponential kernel and application to nonlinear dispersive wave model

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Ocean Engineering and Science 2021年第2期6卷 196-205页

作者： Mehmet yavuz Ndolane Sene Department of Mathematics and Computer Sciences Faculty of ScienceNecmettin Erbakan University42090 KonyaTurkey Department of Mathematics College of EngineeringMathematics and Physical SciencesUniversity of ExeterCornwall TR10UK Laboratoire Lmdan Département de Mathématiques de la DécisionUniversitéCheikh Anta Diop de DakarFacultédes Sciences Economiques et GestionBP 5683 Dakar FannSenegal

Before going further with fractional derivative which is constructed by Rabotnov exponential kernel,there exist many questions that are not *** this paper,we try to recapitulate all the fundamental calculus,which we can obtain with this new fractional *** problems in this paper are to determine the solutions of the fractional differential equations where the second members are constant functions,polynomial functions,exponential functions,trigonometric functions,or Mittag-Leffler *** all the fractional differential equations,the obtained solutions are represented *** Laplace transform of the fractional derivative with Rabotnov exponential kernel is the primary tool in the ***,we give the fundamental solution to the nonlinear time-fractional modified Degasperis-Procesi equation by considering the fractional operator with Rabotnov exponential kernel.

关键词： Fractional differential equation Nonlinear dispersive wave model Rabotnov exponential kernel Mittag-Leffler function Laplace transformation

Finite element analysis of elasto-plastic plate bending problems using transition rectangular plate elements

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Mechanica Sinica 2006年第4期22卷 355-365页

作者： B. Kanber O. yavuz Bozkurt University of Gaziantep Mechanical Engineering Department 27310 Gaziantep Turkey

In this work, the finite element analysis of the elasto-plastic plate bending problems is carried out using transition rectangular plate elements. The shape functions of the transition plate elements are derived based on a practical rule. The transition plate elements are all quadrilateral and can be used to obtain efficient finite element models using minimum number of elements. The mesh convergence rates of the models including the transition elements are compared with the regular element models. To verify the developed elements, simple tests are demonstrated and various elasto-plastic problems are solved. Their results are compared with ANSYS results.

关键词： Finite element method Transition plate elements Elasto-plastic analysis. Plate bending problems

Microstructure,mechanical properties and corrosion resistance of as-cast and as-extruded Mg-4Zn-1La magnesium alloy

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2020年第8期39卷 909-917页

作者： Huseyin Zengin Yunus Turen Hayrettin Ahlatci yavuz Sun Department of Metallurgy and Materials Engineering Karabuk University78050 KarabukTurkey Iron and Steel Institute Karabuk University78050 KarabukTurkey

Microstructure,mechanical properties and corrosion resistance of as-cast and as-extruded Mg-4 wt%Zn-1 wt%La magnesium alloys were *** alloys were produced by low-pressure die casting method and extruded at 350℃after homogenization at 400℃for 24 *** results show that the as-cast alloy mainly consists of primaryα-Mg matrix and Mg-Zn-La ternary second phases(also called T-Phase)along grain boundaries and isolated spherical particles inside the *** extrusion at350℃,the average grain size decreases by 81%due to dynamic recrystallization mechanism and T-phase particles are distributed along the extrusion *** elongation,yield strength and tensile strength of the as-cast Mg-4Zn-1La alloy increase by 179%,90%and 40%,respectively,as a result of the extrusion *** as-extruded Mg-4Zn-1La alloy shows better corrosion resistance than the as-cast alloy due to increased grain boundaries and decreased content of T-phase.

关键词： Magnesium alloys La modification Extrusion Microstructure Mechanical properties Corrosion

Sustainability of lime stabilized road subgrade in mountainous regions of Türkiye

在线全文

学校读者我要写书评

暂无评论

Journal of Mountain Science 2023年第8期20卷 2436-2452页

作者： yavuz ABUT İlknur BOZBEY Ece KURT BAL Department of Transportation Engineering Faculty of EngineeringYalova UniversityYalova 77200Türkiye Geotechnical Engineering Division Civil Engineering DepartmentAvcilar CampusIstanbul University-CerrahpasaAvcilar/Istanbul 34320Türkiye Civil Eng. M.Sc.&Geoph.Eng.Sentez Geopier FoundationsIstanbul 34320Türkiye

In this paper the use of lime stabilized subgrade for low volume roads in two regions with high mountains and different frost penetration conditions in Türkiye was investigated in terms of design,performance,and *** on unstabilized and stabilized subgrade were designed for two regions(Izmir and Van),covering all climate *** resilient modulus of the lime stabilized subgrade with different soil pulverization levels for non-freezing and freezing conditions were taken from a previous laboratory *** effects were considered in pavement design using two different approaches,including limited subgrade frost penetration method and reduced subgrade strength *** application and evaluation were performed for all *** stabilized subgrades significantly reduced the thickness of base courses,and the benefit of lime stabilization was highly dependent on soil pulverization level.A detailed cost analysis on the unstabilized and stabilized cases found that the use of lime stabilization in the subgrade provided significant initial cost *** analysis by using the AASHTO(1993)method and KENPAVE software,and quantity effect of soil pulverization level on the performance of low volume roads from a service life perspective,show that subgrade resilient modulus can be *** is also possible to make correct performance estimation in the *** results of the study show that lime stabilization is a good solution for low volume roads in the mountainous regions of Türkiye.

关键词： Aggregate Surfaced Roads Lime Stabilization Soil Pulverization Levels Road Design Service Life Cost analyses

Fitting Single Particle Energies in sdgh Major Shell

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2015年第2期63卷 222-228页

作者： Erdal Dikmen Oguz ztrk yavuz Cengiz Department of Physics Sleyman Demirel University Department of Electronics and Communication Engineering Sleyman Demirel University

We have performed two kinds of non-linear fitting procedures to the single-particle energies in the sdgh major shell to obtain better shell model results. The low-lying energy eigenvaiues of the light Sn isotopes with A = 103 - 110 in the sdgh-shell are calculated in the framework of the nuclear shell model by using CD-Bonn two-body effective nucleon- nucleon interaction. The obtained energy eigenvalues are fitted to the corresponding experimental values by using two different non-linear fitting procedures, i.e., downhill simplex method and clonai selection method. The unknown single-particle energies of the states 2s1/2, ld3/2, and Oh11/2 are used in the fitting methods to obtain better spectra of the 104,106,108,110Sn isotopes, We compare the energy spectra of the 104,106,108,110Sn and 103,105,107,109Sn isotopes with/without a nonlinear fit to the experimental results.

关键词： shell model optimization of single-particle energies Sn isotopes