Yazar "Hocaoğlu, Fatih Onur" için listeleme
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A 2 dimensional solar radiation model [2 Boyutlu bir güneş işinim şiddeti modeli]
In this study solar radiation data obtained from Eskisehir region is mathematically modeled using a two dimentional (2D) approach. The approach and model is novel in the literature of solar radiation modeling. The analysis ... -
Anadolu Üniversitesi İki Eylül Kampüsündeki Rüzgar Enerjisi Potansiyelinin Önsel İstatistiksel Analizi
Kurban, Mehmet; Hocaoğlu, Fatih Onur; Mert Kantar, Yeliz (Anadolu Üniversitesi, 2007)Bu çalışmada, 2005 yılı Temmuz, Ağustos, Eylül ve Ekim aylarında 15 s aralıklarla ölçülen rüzgar hızı verilerine dayanarak, Anadolu Üniversitesi İki Eylül Kampusu’ndeki rüzgar enerjisi potansiyeli istatistiksel olarak ... -
Determination of displacements on a cutting disc during sawing process
Ucun, İsmail; Hocaoğlu, Fatih Onur; Görgülü, Şükrü (Elsevier Science BV, 2016)In this paper, the displacement signals of a saw disc during cutting of square shaped metallic profiles are examined. The most important aspects of the study for sustainable manufacturing are reducing maintenance costs by ... -
The Effect of Markov Chain State Size for Synthetic Wind Speed Generation
Hocaoğlu, Fatih Onur; Gerek, Ömer Nezih; Kurban, Mehmet (IEEE, 2008)In this study hourly wind speed time series data of Eskisehir region, Turkey have been used for stochastic generation of wind speed data using the transition matrix approach of the Markov chain process. Previous work on ... -
The effect of missing wind speed data on wind power estimation
Hocaoğlu, Fatih Onur; Kurban, Mehmet (Springer-Verlag Berlin, 2007)In this paper, the effect of possible missing data on wind power estimation is examined. One-month wind speed data obtained from wind and solar observation station which is constructed at Iki Ey- Campus of Anadolu University ... -
The effect of model generated solar radiation data usage in hybrid (wind-PV) sizing studies
Hocaoğlu, Fatih Onur; Gerek, Ömer Nezih; Kurban, Mehmet (Pergamon-Elsevier Science LTD, 2009)Wind speed and solar radiation characteristics belonging to past years of a region are the main input parameters in wind-photovoltaic hybrid system (WPHS) sizing studies. Classically, these data are fed to several scenarios ... -
Effects of temperature and pressure information in a hybrid (fourier series / neural networks) solar radiation model
Solar radiation modeling is a critical step in efficient management of solar energy. In this study, a novel solar radiation modeling procedure is developed with the a-priori information of temperature and pressure values, ... -
Harmonic analysis based hourly solar radiation forecasting model
Fidan, Mehmet; Hocaoğlu, Fatih Onur; Gerek, Ömer Nezih (Inst Engineering Technology-Iet, 2015)In this study, a novel two-step hourly solar radiation modelling procedure is developed. In the first step, hourly solar radiation data of a single day is considered and its periodic Fourier series coefficients are calculated. ... -
Hourly solar radiation forecasting using optimal coefficient 2-D linear filters and feed-forward neural networks
Hocaoğlu, Fatih Onur; Gerek, Ömer Nezih; Kurban, Mehmet (Pergamon-Elsevier Science LTD, 2008)In this work, the hourly solar radiation data collected during the period August 1, 2005-July 30, 2006 from the solar observation station in Iki Eylul campus area of Eskisehir region are studied. A two-dimensional (2-D) ... -
Improved synthetic wind speed generation using modified Mycielski approach
Fidan, Mehmet; Hocaoğlu, Fatih Onur; Gerek, Ömer Nezih (Wiley-Blackwell, 2012)In this paper, novel approaches for wind speed data generation using Mycielski algorithm are developed and presented. To show the accuracy of developed approaches, we used three-year collected wind speed data belonging to ... -
Missing wind data forecasting with adaptive neuro-fuzzy inference system
Hocaoğlu, Fatih Onur; Oysal, Yusuf; Kurban, Mehmet (Springer, 2009)In any region, to begin generating electricity from wind energy, it is necessary to determine the 1-year distribution characteristics of wind speed. For this aim, a wind observation station must be constructed and 1-year ... -
Mycielski Algoritması ile Rüzgar Hızı Tahmini
Rüzgar hız tahmini, rüzgar ile ilgili mühendislik problemlerinde önemli bir yer tekil eder. Fakat her meteorolojik olay gibi rüzgar da rastsal davranışlar sergilemektedir. Dolayısıyla bilinen istatistiksel yöntemlerle duyarl ... -
Mycielski Approach for Synthetic Wind Speed Data Generation
Hocaoğlu, Fatih Onur; Fidan, Mehmet; Gerek, Ömer Nezih (IEEE, 2009)In this paper, a novel Mycielski based approach for wind speed data generation is developed and presented. The efficincy of the proposed approach is tested using hourly wind speed data obtained from Izmir region. To test ... -
Mycielski approach for synthetic wind speed data generation [Yapay rüzgar hizi verisi üretiminde mycielski yaklaşimi]
In this paper, a novel Mycielski based approach for wind speed data generation is developed and presented. The efficincy of the proposed approach is tested using hourly wind speed data obtained from İzmir region. To test ... -
Mycielski approach for wind speed prediction
Hocaoğlu, Fatih Onur; Fidan, Mehmet; Gerek, Ömer Nezih (Pergamon-Elsevier Science LTD, 2009)Wind speed modeling and prediction plays a critical role in wind related engineering studies. However, since the data have random behavior, it is difficult to apply statistical approaches with apriori and deterministic ... -
A novel 2-d model approach for the prediction of hourly solar radiation
Hocaoğlu, Fatih Onur; Gerek, Ömer Nezih; Kurban, Mehmet (Springer-Verlag Berlin, 2007)In this work, a two-dimensional (2-D) representation of the hourly solar radiation data is proposed. The model enables accurate forecasting using image prediction methods. One year solar radiation data that is acquired and ... -
A novel fourier based solar radiation model
Solar radiation modeling is an important issue for renewable energyengineering based problems. In this study, a novel solar radiation model isproposed. The model inputs are the solar radiation data belonging to first ... -
A novel hybrid (wind-photovoltaic) system sizing procedure
Hocaoğlu, Fatih Onur; Gerek, Ömer Nezih; Kurban, Mehmet (Pergamon-Elsevier Science LTD, 2009)Wind-photovoltaic hybrid system (WPHS) utilization is becoming popular due to increasing energy costs and decreasing prices of turbines and photovoltaic (PV) panels. However, prior to construction of a renewable generation ... -
Novel Models for Hourly Solar Radiation Using a 2-D Approach
Hocaoğlu, Fatih Onur; Gerek, Ömer Nezih; Kurban, Mehmet (Icic Int, 2009)In this work one year hourly solar radiation data are analyzed and modeled using a novel visualization method. Using a 2-D(Dimensional) surface fitting approach, the general behavior of the solar radiation in a year is ... -
A novel wind speed modeling approach using atmospheric pressure observations and hidden Markov models
Hocaoğlu, Fatih Onur; Gerek, Ömer Nezih; Kurban, Mehmet (Elsevier Science BV, 2010)Modeling the wind speed data has important implications in wind studies, providing valuable insight and parametric quantities for further engineering analysis. The classical modeling approach is to fit the probability ...
