Yazar "Alpu, Özlem" için Makale Koleksiyonu listeleme
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Combining some biased estimation methods with least trimmed squares regression and its application [Combinación de algunos métodos de estimación sesgados con regression de mínimos cuadrados recortados y su aplicación]
Kan Kılınç, Betül; Alpu, Özlem (Universidad Nacional de Colombia, 2015)In the case of multicollinearity and outliers in regression analysis, the researchers are encouraged to deal with two problems simultaneously. Biased methods based on robust estimators are useful for estimating the regression ... -
Estimation of clearness index model via CRS, TPRS and mars
Alpu, Özlem; Kan Kılınç, Betül; Yazıcı, Berna (2011)Nonparametric approach is more flexible than parametric approach in assuming that f belongs to a smooth family of functions. Hence, a nonparametric approach does not require an assumption of linearity. Based on our motivating ... -
Estimation of Clearness Index Model Via Crs, Tprs and Mars
Alpu, Özlem; Kan Kılınç, Betül; Yazıcı, Berna (Isoss Publ, 2011)Nonparametric approach is more flexible than parametric approach in assuming that f belongs to a smooth family of functions. Hence, a nonparametric approach does not require an assumption of linearity. Based on our motivating ... -
Robust ridge and robust Liu estimator for regression based on the LTS estimator
Kan Kılınç, Betül; Alpu, Özlem; Yazıcı, Berna (Taylor & Francis LTD, 2013)In the multiple linear regression analysis, the ridge regression estimator and the Liu estimator are often used to address multicollinearity. Besides multicollinearity, outliers are also a problem in the multiple linear ...