检索结果-南通市图书馆

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

在线全文

学校读者我要写书评

暂无评论

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

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

在线全文

维普期刊数据库

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

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

在线全文

学校读者我要写书评

暂无评论

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

在线全文

学校读者我要写书评

暂无评论

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

在线全文

学校读者我要写书评

暂无评论

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)

Emergency admissions due to swallowed foreign bodies in adults

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2013年第38期19卷 6447-6452页

作者： Bülent Erbil mehmet Ali Karaca mehmet Ali Aslaner Zaur Ibrahimov mehmet Mahir Kunt Erhan Akpinar mehmet Mahir zmen Department of Emergency Medicine Faculty of MedicineHacettepe University06100 AnkaraTurkey Department of Radiology Faculty of MedicineHacettepe University06100 AnkaraTurkey Department of General Surgery Faculty of MedicineHacettepe University06100 AnkaraTurkey

AIM:To study a retrospective analysis of patients who presented to the emergency departments(ED)with complaints related to foreign body ***:Patients older than 16 years of age who presented to the ED between January 1stand December 31stof 2010 with complaints related to swallowed foreign bodies were identified from electronic health records and patient ***:A total of 100 patients presented with a complaint of foreign body ingestion during the study ***,an X-ray was performed on 75 patients,and a fiberoptic evaluation was performed on45 patients.A foreign body was detected in 46(46%)*** diagnostic yield of the X-ray was 27(36%)out of 75 patients,while the diagnostic yield of the fiberoptic evaluations was 21(47%)out of 45 *** detected foreign bodies were mostly located in the esophagus(17 out of 46 foreign bodies detected).When the types of ingested foreign bodies were evaluated,52(52%)patients reported ingesting food,and19(19%)patients reported swallowing *** X-ray was performed on 33 patients with accidental food ingestions but yielded a positive result in only two *** 12 out of 21 patients with accidental food ingestion who underwent fiberoptic evaluation,the foreign material was detected and ***:Plain radiography is helpful in the localization of radiopaque swollen foreign bodies,while fiberoptic methods are useful as both diagnostic and therapeutic tools,regardless of radiopacity.

关键词： Foreign body Ingestion Gastrointestinal tract Endoscopy Emergency

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

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

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

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

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

在线全文

学校读者我要写书评

暂无评论

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.