Yazar "Mert Kantar, Yeliz" için Fen Fakültesi listeleme
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Analysis of some flexible families of distributions for estimation of wind speed distributions
Usta, İlhan; Mert Kantar, Yeliz (Elsevier Sci LTD, 2012)The wind speed distribution is the basis for the assessment of wind energy potential needed for the design of wind farms. Therefore, the proper specification of the wind speed distribution is of special importance. In this ... -
Analysis of the modified weibull distribution for estimation of wind speed distribution
Yenilmez, İsmail; Mert Kantar, Yeliz; Arık, İbrahim; Usta, İlhan (Association for Computing Machinery, 2015)Finding suitable wind speed distribution is one of the most important tasks for the correct estimation of wind energy potential of the specified region. The Weibull distribution is the well-known and suggested distribution ... -
Analysis of the upper-truncated Weibull distribution for wind speed
Mert Kantar, Yeliz; Usta, İlhan (Pergamon-Elsevier Science LTD, 2015)Accurately modeling wind speed is critical in estimating the wind energy potential of a certain region. In order to model wind speed data smoothly, several statistical distributions have been studied. Truncated distributions ... -
Analysis of wind speed distributions: Wind distribution function derived from minimum cross entropy principles as better alternative to Weibull function
Mert Kantar, Yeliz; Usta, İlhan (Pergamon-Elsevier Science LTD, 2008)In this study, the minimum cross entropy (MinxEnt) principle is applied for the first time to the wind energy field. This principle allows the inclusion of previous information of a wind speed distribution and covers the ... -
Biquaternionic reformulation of multifluid plasma equations
Demir, Süleyman; Tanışlı, Murat; Şahin, Neslihan; Mert Kantar, Yeliz (Elsevier Science BV, 2017)Extending the biquaternionic generalization of the Maxwell type equations of compressible fluids, an effort has been introduced for the reformulation of analogous multifluid plasma equations. With the help of an exact ... -
A comparative study for the location and scale parameters of the Weibull distribution with given shape parameter
Mert Kantar, Yeliz; Şenoğlu, Birdal (Pergamon-Elsevier Science LTD, 2008)Nine parametric estimators of the location and scale parameters of a two-parameter Weibull distribution are compared in terms of their bias and efficiency in a simulation study. The estimators considered are the maximum ... -
Comparison of certain value-at-risk estimation methods for the two-parameter Weibull loss distribution
Gebizlioğlu, Ömer L.; Şenoğlu, Birdal; Mert Kantar, Yeliz (Elsevier Science BV, 2011)The Weibull distribution is one of the most important distributions that is utilized as a probability model for loss amounts in connection with actuarial and financial risk management problems. This paper considers the ... -
Comparison of six different parameter estimation methods in wind power applications
Mert Kantar, Yeliz; Kurban, M.; Hocaoğlu, F. O. (2011)In this paper, the different parameter estimation methods such as maximum likelihood method, least square method, weighted least square method, moments method, the method based on quantiles and maximum spacing method for ... -
Comparison of Some Estimation Methods of the two parameter Weibull Distribution for Unusual
Since the Weibull distribution has been accepted reference distribution in wind energy field, topics on its parameter estimation methods get much attention. In this context, the literature have generally focused on non-robust ... -
The distribution of minimizing maximum entropy: Alternative to Weibull distribution for wind speed
In the present study, we have constructed MinMaxEnt distribution alternative to the Weibull distribution for the wind speed. MinMaxEnt distribution minimizes the special maximum entropy functional in the concrete set of ... -
Distributions of Wind Speed at Different Heights
Mert Kantar, Yeliz; Usta, İlhan; Arık, İbrahim; Yenilmez, İsmail (IEEE, 2016)In this study, the parameters of different distributions such as the Weibull, Rayleigh, Lognormal, Gamma and Generalized Gamma, which are used for modelling wind speed, at the different heights 10 and 30 m, have been ... -
Elec tromagnetic energy conservation with complex octonions
Mert Kantar, Yeliz; Li, M. T.; Demir, Süleyman (2012)Octonions are the eight dimensional hypercomplex numbers that form a noncommutative and nonassociative division algebra. In this study, a general framework for the real, complex octonions and their algebra are provided by ... -
Estimating the location and scale parameters of the Weibull distribution: An application from engineering
Mert Kantar, Yeliz; Şenoğlu, Birdal (Acta Press Anaheim, 2007)There exist various methods for estimating the location and scale parameters of the Weibull distribution. The maximum likelihood estimators (MLE), moment estimators (ME), generalized spacing estimators (GSE), modified ... -
Estimating variances inweighted least-squares estimation of distributional parameters
Mert Kantar, Yeliz (Association for Scientific Research, 2016)Many estimation methods have been proposed for the parameters of statistical distribution. The least squares estimation method, based on a regression model or probability plot, is frequently used by practitioners since its ... -
Estimation of Censored Regression Model in the Case of Non-Normal Error
Yenilmez, İsmail; Mert Kantar, Yeliz; Acıtaş, Şükrü (Yildiz Technical University, 2018)For the censored regression model, it is well-known that while classical least squares estimation yields biased and nonconsistent estimator, maximum likelihood estimator (MLE) is consistent and efficient. Tobit estimator ... -
Estimator based on percentiles for log-logistic distribution
Arık, I.; Mert Kantar, Yeliz (2012)In this study, we consider the estimator based on percentiles for log-logistic distribution similar to the study of [6] and we also graph breakdown plots of the estimators that are considered below to have an opinion about ... -
Evaluation of robust estimation methods in estimating weibull parameters for wind energy application
Arık, I.; Mert Kantar, Yeliz; Usta, İlhan; Yenilmez, İsmail (Association for Computing Machinery, 2015)Two-parameter Weibull distribution has been widely-used reference distribution in wind energy studies and thus its parameter estimation methods have been well-studied in the literature. However, the literature have generally ... -
Farklı Olasılık Yoğunluk Fonksiyonları Kullanarak Rüzgar Gücü Potansiyelinin Tahmini
Usta, İlhan; Mert Kantar, Yeliz (2016)Sürekli rassal değişken olarak kabul edilen rüzgâr hızı istatistiksel dağılımlarla karakterize edilir ve ortalama rüzgâr gücü tahminleri yapılır. Weibull dağılımı rüzgar enerjisi alanında kabul edilmiş dağılımdır. Ancak ... -
Generalized Least Squares and Weighted Least Squares Estimation Methods for Distributional Parameters
Mert Kantar, Yeliz (Inst Nacional Estatistica-Ine, 2015)Regression procedures are often used for estimating distributional parameters because of their computational simplicity and useful graphical presentation. However, the resulting regression model may have heteroscedasticity ... -
M-estimation of log-logistic distribution parameters with outliers
Arık, I.; Mert Kantar, Yeliz (DAV College, 2014)Log-logistic distribution is widely-used in the analysis of agricultural, survival, hydrological and economics data. Therefore, its parameters have to be estimated accurately. Generally, traditional estimators such as ...