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Performance analysis of a distributed power control algorithm for shared and split spectrum femtocell networks

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Control Theory and Technology 2016年第4期14卷 314-322页

作者： Kamil SENEL mehmet AKAR Department of Electrical and Electronics Engineering Bogazici University Istanbul 34342 Turkey

In this paper, we study the performance of a distributed power adjustment algorithm for shared and split spectrum allocation setups. The theoretical analysis reveals that the convergence of the power control algorithm is guaranteed under different spectrum allocation schemes and the convergence rate is exponential. The performance analysis is also carried out via simulations which demonstrate the algorithm fairness under Jain＇s and Atkinkons＇ fairness indices.

关键词： Femtocell networks power control consensus

NONLINEAR DYNAMIC ANALYSIS OF A LAMINATED HYBRID COMPOSITE PLATE SUBJECTED TO TIME-DEPENDENT EXTERNAL PULSES

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Acta Mechanica Solida Sinica 2012年第6期25卷 586-597页

作者： mehmet Senyer Zafer Kazanci Turkish Air Force Academy Aeronautics and Space Technologies Institute34149 Ye silyurt Istanbul Turkey Turkish Air Force Academy Aerospace Engineering Department34149 Ye silyurt Istanbul Turkey

Nonlinear dynamic responses of a laminated hybrid composite plate subjected to time-dependent pulses are investigated. Dynamic equations of the plate are derived by the use of the virtual work principle. The geometric nonlinearity effects are taken into account with the yon Karman large deflection theory of thin plates. Approximate solutions for a clamped plate are assumed for the space domain. The single term approximation functions are selected by considering the nonlinear static deformation of plate obtained using the finite element method. The Galerkin Method is used to obtain the nonlinear differential equations in the time domain and a MATLAB software code is written to solve nonlinear coupled equations by using the Newmark Method. The results of approximate-numerical analysis are obtained and compared with the finite element results. Transient loading conditions considered include blast, sine, rectangular, and triangular pulses. A parametric study is conducted considering the effects of peak pressure, aspect ratio, fiber orientation and thicknesses.

关键词： nonlinear vibration hybrid composite plate Newmark method dynamic loads

On Gauss-Weierstrass Semigroups and Inversion of Potentials Associated with the Bessel Differential Operator

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Acta Mathematica Sinica,English Series 2009年第10期25卷 1741-1758页

作者： mehmet ZekiSARIKAYA HüseyinYILDIRIM Department of Mathematics Faculty of Science and ArtsAfyon Kocatepe University

In this paper, we define the generalized Gauss Weierstrass semigroups with Weierstrass kernel, and give some of their properties. Using them, we study the inversion formulas for the generalized Riesz and Bessel potent... 详细信息

关键词： Bessel differential operator Bessel potential Riesz potential Schwartz space convolution,semigroup Gauss-Weierstrass kernel

Spiraea cudidaghense:a new species from south-eastern Anatolia,Turkey

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Journal of Forestry Research 2018年第6期29卷 1751-1756页

作者： mehmet Firat Necmi Aksoy Department of Biology Faculty of EducationYuzucu Yil University65080 VanTurkey Faculty of Forestry&DUOF Herbarium Duzce University81620 DuzceTurkey

A new species, Spiraea cudidaghense(sect. Spiraeoideae, Rosaceae), is described and illustrated with diagnostic characters and taxonomic comments. Its characteristics are compared with those of the type species from which it differs mainly in compound corymbs inflorescence, ovate-obovate leaves, white petals, glabrous branches and densely pilose corymbs. In addition, a map of the geographic distribution of the new species, an IUCN ranking and notes on taxonomic affinities are also provided.

关键词： Spiraea cudidaghense Taxonomy New species Turkey

The First Photometric Study of W UMa Binary System V1833 Ori

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Research in Astronomy and Astrophysics 2022年第8期22卷 258-269页

作者： mehmet Tanrıver Ahmet Bulut Astronomy and Space Science Science FacultyUniversity of ErciyesTR-38039KayseriTürkiye Erciyes University Astronomy and Space Science Observatory Application and Research CenterTR-38039KayseriTürkiye Department of Physics Faculty of Arts and SciencesÇanakkale Onsekiz Mart UniversityTerzioglu CampusTR-17020ÇanakkaleTürkiye Astrophysics Research Center and Observatory Çanakkale Onsekiz Mart UniversityTerzioglu CampusTR-17020ÇanakkaleTürkiye

The first photometric solution in the B,V,R_(c) and I_(c) filters of the short period V1833 Ori eclipsing binary is presented based on new ground-based CCD photometric *** analyzed the BVRI photometric light curves of the system,using PHOEBE 0.31 a,a binary star modeling program,with the Wilson-Devinney method based on Roche geometry to achieve the best accordance with the photometric observations to determine their absolute parameters from the light *** updated the ephemeris of V1833 Ori using two new light curve minima derived by our new observational data from those collected in the literature and analyzed the change of the system's orbital *** O-C analysis indicates that the variations of the orbital period of V1833 Ori with time are increasing at a rate of 3.03×10^(-7)days yr^(-1).The distance of V1833 Ori is 173.7±15.6 *** the solutions,we find that V1833 Ori is an A-subtype W UMa overcontact binary with q=0.701 mass ratio and f=1.14 fill-out *** HR diagram positions of the eclipsing binary system's components are *** system's absolute dimensions were compared to those of similar binaries in the log T_(eff)-log L,logM-logL,1 ogM-logR and logM-log J_(0)diagrams.

关键词： (stars:)binaries:eclipsing stars:fundamental parameters stars:individual(V1833 Ori)

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

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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

Quantification of methyldopa in pharmaceuticals using a glassy carbon electrode modified with carbon nanotubes

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Chinese Chemical Letters 2016年第1期27卷 91-95页

作者： Aysegul Kutluay mehmet Aslanoglu Department of Chemistry University of Harran

The quantification of methyldopa in pharmaceuticals has been carried out using a glassy carbon electrode（GCE） modified with multi-walled carbon nanotubes（MWCNTs）. Methyldopa exhibited a quasi-reversible response with a peak potential separation of 473 m V on a bare GCE. However, the cyclic voltammetric behaviour of methyldopa was improved with the increase of the amount of MWCNTs. It was also shown that the electrocatalytic activity of the electrode towards the response of methyldopa was higher with larger amount of film on the surface. The results showed that the peak current was proportional to the concentration of methyldopa with a linear dynamic range of 0.005-0.388 mmol/L and a detection limit of 1.0 nmol/L was obtained using square wave voltammetry. The experimental data showed that the detection limit of methyldopa and peak separation from interfering compounds such as ascorbic acid（AA） and uric acid（UA） were improved using the proposed procedure. The method was successfully applied for the determination of methyldopa in pharmaceuticals.

关键词： Methyldopa Carbon nanotubes Ascorbic acid Uric acid

Deep tissue near-infrared imaging for vascular network analysis

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Journal of Innovative Optical Health Sciences 2017年第3期10卷 12-23页

作者： Kübra Seker mehmet Engin Department of Electrical&Electronics Engineering Faculty of Engineering Ege University Bornova IzmirTurkey35100

Subcutaneous vein network plays important roles to maintain microcirculation that is related to some diagnostic *** developments of optical imaging technologies,still the difficulties about deep skin vascular imaging have been *** the other hand,since hemoglobin con-centration of human blood has key role in the veins imaging by optical manner,the used wavelength in vascular imaging,must be chosen considering absorption of *** this research,we constructed a near infrared(NIR)light source because of lower absorption of hemoglobin in this optical *** obtain vascular image,reflectance geometry was ***,from recorded images,vascular network analysis,such as calculation of width of vascular of interest and complexity of selected region were *** comparing with other modalities,we observed that proposed imaging system has great advantages including nonionized radiation,moderate penetration depth of 0.5-3 mm and diameter of 1 mm,cost-effective and algorit hmic simplicity for analysis.

关键词： Vascular NIR imaging manufacturing liquid and solid phantoms difuse optical imaging image processing and analysis optical imaging system design.

Investigation of Single-Wall MoS_2 Monolayer Flakes Grown by Chemical Vapor Deposition

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Nano-Micro Letters 2016年第1期8卷 70-79页

作者： Nihan Kosku Perkgoz mehmet Bay Department of Electrical and Electronics Engineering Faculty of Engineering Anadolu University

Recently, two-dimensional monolayer molybdenum disulfide(MoS_2), a transition metal dichalcogenide, has received considerable attention due to its direct bandgap, which does not exist in its bulk form, enabling applications in optoelectronics and also thanks to its enhanced catalytic activity which allows it to be used for energy harvesting. However,growth of controllable and high-quality monolayers is still a matter of research and the parameters determining growth mechanism are not completely clear. In this work, chemical vapor deposition is utilized to grow monolayer MoS_2 flakes while deposition duration and temperature effect have been systematically varied to develop a better understanding of the MoS_2 film formation and the influence of these parameters on the quality of the monolayer flakes. Different from previous studies, SEM results show that single-layer MoS_2 flakes do not necessarily grow flat on the surface, but rather they can stay erect and inclined at different angles on the surface, indicating possible gas-phase reactions allowing for monolayer film formation. We have also revealed that process duration influences the amount of MoO_3/MoO_2 within the film network. The homogeneity and the number of layers depend on the change in the desorption–adsorption of radicals together with sulfurization rates, and, inasmuch, a careful optimization of parameters is crucial. Therefore, distinct from the general trend of MoS_2 monolayer formation, our films are rough and heterogeneous with monolayer MoS_2 nanowalls. Despite this roughness and the heterogeneity, we observe a strong photoluminescence located around 675 nm.

关键词： Monolayer Chemical vapor deposition Two-dimensional materials Molybdenum disulfide(MoS2)