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    ARMAX Sistemlerinde Kontrol Problemi Üzerine Bir Çalışma
    (Selçuk Üniversitesi Fen-Edebiyat Fakültesi, 2006) Arslan, Fahrettin; Köksal, Ersin; Öztürk, Fikri
    Bu çalışmada, ARMAX ile modellenen sistemlerde parametrelerin bilinmesi ve bilinmemesi durumları için kontrol problemi ele alınmaktadır. En-küçük varyans, LQG ve kutup kaydırmalı kontrol üzerinde durulup, bazıları için simulasyon çalışmaları yapılmaktadır.
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    Selecting the suitable Copula function when only values of distribution functions are avaliable
    (Selcuk University Research Center of Applied Mathematics, 2012) Topçu, Çiğdem; Arslan, Fahrettin
    Copula functions is widely known tool to model dependence structure amaong multivariate random variables. In this paper, a special class of copula is called Archimedean is considered. Using bivariate Archimedean copula functions, specifying the dependence structure for modelling bivariate distribution is investigated when only the values of distribution functions are avaliable.
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    Wheat yield dynamics: A structural econometric analysis
    (Asian Network for Scientific Information, 2007) Şahin, Afşin; Akdi, Yılmaz; Arslan, Fahrettin
    In this study we initially have tried to explore the wheat situation in Turkey, which has a small-open economy and in the member countries of European Union (EU). We have observed that increasing the wheat yield is fundamental to obtain comparative advantage among countries by depressing domestic prices. Also the changing structure of supporting schemes in Turkey makes it necessary to increase its wheat yield level. For this purpose, we have used available data to determine the dynamics of wheat yield by Ordinary Least Square Regression methods. In order to find out whether there is a linear relationship among these series we have checked each series whether they are integrated at the same order or not. Consequently, we have pointed out that fertilizer usage and precipitation level are substantial inputs for producing high wheat yield. Furthermore, in respect for our model, fertilizer usage affects wheat yield more than precipitation level. © 2007 Asian Network for Scientific Information.