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A Survey on Belief Propagation Decoding of Polar Codes

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China Communications 2021年第8期18卷 133-168页

作者： ahmet Cagrı Arlı Orhan Gazi Digital Design and Verification Engineering Department Electra ICAnkaraTurkiye Electronic and Communication Engineering Cankaya UniversityAnkaraTurkiye

The increasing data traffic rate of wireless communication systems forces the development of new technologies *** high data rate,extremely low latency and improvement on quality of service are the main subjects of next generation 5G wireless communication systems which will be in the people’s life in the years of *** the newest and first mathematically proven forward error correction code,polar code is one of the best candidates among error correction methods that can be employed for 5G wireless *** aim of this tutorial is to show that belief propagation decoding of polar codes can be a promising forward error correction technique in upcoming 5G ***,we survey the novel approaches to the belief propagation based decoding of polar codes and continue with the studies about the simplification of these ***,early detection and termination methods and concept of scheduling are going to be presented throughout the ***,polar construction algorithms,error types in belief propagation based decoders and hardware implementations are going to be ***,this tutorial proves that the BP based decoding of polar codes has a great potential to be a part of communication standards.

关键词： polar codes belief propagation 5G

An Experimental Study on Thermal Characteristics of Laurie Acid as a Latent Heat Storage Material during Melting Process

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Chinese Journal of Chemical Engineering 2003年第2期11卷 240-243页

作者： ahmet SARI Department of Chemistry Gaziosmanpasa University

The objective of this study was to establish the thermal characteristics of the lauric acid (95% purity) as a latent heat storage material filled in the annulus of vertical concentric double pipe during its melting process,The temperature data were used to determine the thermal characteristics,including the temporal temperature variations and the effects of the mass flow rate and the inlet temperature of the heat transfer fluid on the heat transfer coefficient and the heat charging fraction during the melting process,The results indicated that the time to reach to heat charging fraction of 1.0 could be altered by changing the mass flow rate and the inlet temperature of the heat transfer fluid.

关键词： lauric acid phase change material thermal characteristics melting process

Orientation in Nematic Liquid Crystals Doped with Orange Dyes and Effect of Carbon Nanoparticles

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Chinese Journal of Chemical Physics 2010年第3期23卷 368-372,I0002页

作者： ahmet Alicilar Fatih Akkurt Nihan Kaya 加辛大学工学院化学工程系马尔泰佩安卡拉06570

Some properties of nematic liquid crystal E7 doped with two disperse orange dyes used together and effect of addition of carbon nanoparticles （single walled carbon nanotube or fullerene C60） on them were studied. Two dyes （disperse orange 11 and 13） having high solubility and order parameter were used as co-dopants. A notable increase in order parameter was obtained comparing to that of liquid crystal doped with single dye. When carbon nanoparticles were used as dopant, a decrease in order parameter was observed at low temperatures while it increased at high temperatures. When applied voltage changed, the order parameter abruptly increased in its threshold value and saturated in higher voltages as expected. An appreciable change in textures was not observed with addition of dopants. This addition gave rise to an increase in nematic-isotropic phase transition temperatures compared with that of pure liquid crystal.

关键词： Liquid crystal Disperse orange dye Carbon nanoparticle Order parameter

The Exp-function Method for Some Time-fractional Differential Equations

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IEEE/CAA Journal of Automatica Sinica 2017年第2期4卷 315-321页

作者： ahmet Bekir Ozkan Guner Adem Cevikel Department of Mathematics-computer Eskisehir Osmangazi University Department of International Trade Cankiri Karatekin University Department of Mathematics Education Yildiz Technical University

In this article, the fractional derivatives in the sense of modified Riemann-Liouville derivative and the Exp-function method are employed for constructing the exact solutions of nonlinear time fractional partial differential equations in mathematical physics. As a result, some new exact solutions for them are successfully established. It is indicated that the solutions obtained by the Exp-function method are reliable, straightforward and effective method for strongly nonlinear fractional partial equations with modified Riemann-Liouville derivative by Jumarie's. This approach can also be applied to other nonlinear time and space fractional differential equations.

关键词： Exact solution exp-function method fractional differential equation

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)

Airborne Pollen Grains of Burdur, Turkey

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Acta Botanica Sinica 2000年第8期42卷 864-867页

作者： Adem BIC ahmet AK Depsrtment of Biology Faculty

The pollen grains in the atmosphere of Burdur have been studied for a two_year period (1996 through 1997) with a Durham sampler. A total of 11?881 pollen grains belonging to 39 taxa have been identified and recorded with some unidentified ones. Of them, 5?726 were identified in 1996 and 6?155 in 1997. Of the total pollen grains, 76.51% were arboreal, 21.62% non_arboreal and 1.87% unidentified. The majority of the investigated pollen grains were from Pinus L., Cupressaceae, Gramineae, Quercus L., Platanus L., Chenopodiaceae/Amaranthaceae, Salix L., Cedrus L., Compositae, Juglans L. and Urticaceae respectively. The highest level of pollen concentration was in May.

关键词：土耳其空气花粉浓度花粉过敏周变化月变化

Singular 1-soliton and Periodic Solutions to the Nonlinear Fisher-Type Equation with Time-Dependent Coefficients

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Communications in Theoretical Physics 2016年第4期65卷 405-409页

作者： Ozkan Guner ahmet Bekir Cankiri Karatekin University Faculty of Economics and Administrative SciencesDepartment of International Trade Eskisehir Osmangazi University Art-Science FacultyDepartment of Mathematics and Computer Science

In this article,we establish exact solutions for the variable-coefficient Fisher-type *** solutions are obtained by the modified sine-cosine method and ansatz *** soliton and periodic solutions and topological as well as the singular 1-soliton solution are obtained with the aid of the ansatz *** solutions are important for the explanation of some practical physical *** obtained results show that these methods provide a powerful mathematical tool for solving nonlinear equations with variable coefficients.

关键词： modified sine-cosine method ansatz method the variable-coefficient Fisher-type equation

3-D Gait Identification Utilizing Latent Canonical Covariates Consisting of Gait Features

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Computers, Materials & Continua 2023年第9期76卷 2727-2744页

作者： Ramiz Gorkem Birdal ahmet Sertbas Department of Computer Engineering Istanbul UniversityCerrahpasaIstanbul34300Turkey

Biometric gait recognition is a lesser-known but emerging and effective biometric recognition method which enables subjects’walking patterns to be *** research in this area has primarily focused on feature analysis through the extraction of individual features,which captures most of the information but fails to capture subtle variations in gait ***,a novel feature taxonomy and an approach for deriving a relationship between a function of one set of gait features with another set are *** gait features extracted from body halves divided by anatomical planes on vertical,horizontal,and diagonal axes are grouped to form canonical gait *** Correlation Analysis is utilized to measure the strength of association between the canonical covariates of ***,gait assessment and identification are enhancedwhenmore semantic information is available through CCA-basedmulti-feature ***,CarnegieMellon University’s 3D gait database,which contains 32 gait samples taken at different paces,is utilized in analyzing gait *** performance of Linear Discriminant Analysis,K-Nearest Neighbors,Naive Bayes,Artificial Neural Networks,and Support Vector Machines was improved by a 4%average when the CCA-utilized gait identification approachwas *** maximumaccuracy rate of 97.8%was achieved throughCCA-based gait *** that,the rate of false identifications and unrecognized gaits went down to half,demonstrating state-of-the-art for gait identification.

关键词： Gait identification canonical covariates multivariate data analysis gait determinant

Analytical Approach to Fractional Zakharov-Kuznetsov Equations by He's Homotopy Perturbation Method

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Communications in Theoretical Physics 2010年第6期53卷 1005-1010页

作者： ahmet Yildirim Yagmur Gülkanat Ege University Department of Mathematics

The aim of this paper is to obtain the approximate analytical solution of a fractional Zakharov-Kuznetsov equation by using homotopy perturbation method (HPM). The fractional derivatives are described in the Caputo sense. Several examples are given and the results are compared to exact solutions. The results reveal that the method is very effective and simple.

关键词： homotopy perturbation method fractional Zakharov-Kuznetsov equations fractional calculus Caputo sense