Yazar "Yılmaz, Ersin" için listeleme
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Bandwidth Selection Problem for Nonparametric Regression Model with Right-Censored Data
Aydın, Dursun; Yılmaz, Ersin (Natl Inst Statistics, 2017)In this paper, the proposed estimator for the unknown nonparametric regression function is a Nadarya-Watson (Nadarya, 1964; Watson, 1964) type kernel estimator. In this estimation procedure, the censored observations are ... -
Censored Nonparametric Time-Series Analysis with Autoregressive Error Models
Aydın, Dursun; Yılmaz, Ersin (Springer, 2020)This paper focuses on nonparametric regression modeling of time-series observations with data irregularities, such as censoring due to a cutoff value. In general, researchers do not prefer to put up with censored cases in ... -
Choice of smoothing parameter for kernel type ridge estimators in semiparametric regression models
Yılmaz, Ersin; Yüzbaşı, Bahadır; Aydın, Dursun (National Statistical Institute, 2021)This paper concerns kernel-type ridge estimators of parameters in a semiparametric model. These estimators are a generalization of the well-known Speckman’s approach based on kernel smoothing method. The most important ... -
Comparison of parametric and semi-parametric models with randomly right-censored data by weighted estimators: Two applications in colon cancer and hepatocellular carcinoma datasets
Yenilmez, İsmail; Yılmaz, Ersin; Mert Kantar, Yeliz; Aydın, Dursun (SAGE Publications Inc., 2021)In this study, parametric and semi-parametric regression models are examined for random right censorship. The components of the aforementioned regression models are estimated with weights based on Cox and Kaplan-Meier ... -
Completing right-censored data in time-series modelling
Yılmaz, Ersin; Bal, Çağatay; Doğu, Zeynep Filiz Eren (Institute of Electrical and Electronics Engineers Inc., 2019)This paper focuses on nonparametric regression modelling of time series observations with data irregularities, such as censoring due to a cutoff value. In general, researchers do not prefer to put up with censored cases ... -
Determination of Exogenous Adrenaline Levels in Patients Undergoing Cardiopulmonary Resuscitation
Altuntaş, Mehmet; Altuntaş, Derya Bal; Aslan, Sema; Yılmaz, Ersin; Nalbant, Ercan (American Chemical Society, 2023)Core-shell quantum dot ZnS/CdSe screen-printed electrodes were used to electrochemically measure human blood plasma levels of exogenous adrenaline administered to cardiac arrest patients. The electrochemical behavior of ... -
Effects of Lunar Phases and Weather Conditions on Small-scale and Trawl Fishery Landings in Southern Aegean Sea, Turkiye
Cerim, HasanCerim, Hasan; Yılmaz, Ersin; Doğu, Eralp (SPRINGER INT PUBL AG, 2023)Several studies have investigated the effect of the lunar phase and weather conditions on animal behaviour. As in other parts of the world, fishermen may modify their behaviour in response to the weather conditions and the ... -
Estimating the Nonparametric Regression Function by Using Pade Approximation Based on Total Least Squares
Ahmed, Syed Ejaz; Aydın, Dursun; Yılmaz, Ersin (Taylor & Francis Inc, 2020)In this paper, we propose a Pade-type approximation based on truncated total least squares (P - TTLS) and compare it with three commonly used smoothing methods: Penalized spline, Kernel smoothing and smoothing spline methods ... -
Estimation of Right Censored Nonparametric Regression Solved by kNN Imputation: A Comparative Study
Yılmaz, Ersin; Aydın, Dursun (2019)This paper introduces an estimation procedure for the right-censored nonparametric regression model using smoothing spline method. In this process, to overcome the censorship problem we used an imputation method based on ... -
Estimation of Right-censored SETAR-type Nonlinear Time-series Model
Ahmed, Syed Ejaz; Aydın, Dursun; Yılmaz, Ersin (EDP Sciences, 2023)This paper focuses on estimating the Self-Exciting Threshold Autoregressive (SETAR) type time-series model under right-censored data. As is known, the SETAR model is used when the underlying function of the relation-ship ... -
Estimation of semiparametric regression model with right-censored high-dimensional data
Aydın, Dursun; Ahmed, S. Ejaz; Yılmaz, Ersin (Taylor & Francis Ltd, 2019)In this paper, we consider the estimation problem for the semiparametric regression model with censored data in which the number of explanatory variables p in the linear part is much larger than sample size n, often denoted ... -
Imputation Method Based on Sliding Window for Right-Censored Data
Ahmed, Syed Ejaz; Aydın, Dursun; Yılmaz, Ersin (Springer, 2020)Censored data arise in almost all important statistical analyses. For example, in patient-based studies, biostatistics data often subject to right censoring due to the detection limits, or to incomplete data. In the context ... -
Kernel Ridge Estimator for the Partially Linear Model under Right-Censored Data
Ahmed, Syed Ejaz; Aydın, Dursun; Yılmaz, Ersin (IRANIAN STATISTICAL SOC, 2021)Objective: This paper aims to introduce a modified kernel-type ridge estimator for partially linear models under randomly-right censored data. Such models include two main issues that need to be solved: multi-collinearity ... -
Modelling Right-Censored Data with Partially Linear Model and Feed Forward Neural Networks: A Methodological Study
Bal, Çağatay; Yılmaz, Ersin (Türkiye klinikleri, 2022)Objective: Modeling right-censored data becomes a challenging task in survival analysis, due to having an incomplete data structure. When the response variable is rightcensored, classical estimation methods cannot be used ... -
Modified estimators in semiparametric regression models with right-censored data
Aydın, Dursun; Yılmaz, Ersin (Taylor & Francis Ltd, 2018)In this work we introduce different modified estimators for the vector parameter and an unknown regression function g in semiparametric regression models when censored response observations are replaced with synthetic data ... -
Modified Local Linear Estimators in Partially Linear Additive Models with Right-Censored Data Based on Different Censorship Solution Techniques
Yılmaz, Ersin; Aydın, Dursun; Ahmed, Syed Ejaz (MDPI, 2023)This paper introduces a modified local linear estimator (LLR) for partially linear additive models (PLAM) when the response variable is subject to random right-censoring. In the case of modeling right-censored data, PLAM ... -
Modified spline regression based on randomly right-censored data: A comparative study
Aydın, Dursun; Yılmaz, Ersin (Taylor & Francis Inc, 2018)In this paper, we propose modified spline estimators for nonparametric regression models with right-censored data, especially when the censored response observations are converted to synthetic data. Efficient implementation ... -
Nonparametric regression estimates based on imputation techniques for right-censored data
Ahmed, Syed Ejaz; Aydin, Dursun; Yılmaz, Ersin (Springer Verlag, 2020)Censored data is a kind of data type where the exact value of a response variable is not completely known. Therefore, this case is a problem that should be solved in order to obtain an accurate and efficient data analysis. ... -
Optimum shrinkage parameter selection for ridge type estimator of Tobit model
Aydın, Dursun; İşçi Güneri, Öznur; Yılmaz, Ersin (Taylor and Francis Ltd., 2020)This paper presents different ridge type estimators based on maximum likelihood ((Formula presented.)) for parameters of a Tobit model. In this context, an algorithm is introduced to get the estimators based on (Formula ... -
Penalty and Shrinkage Strategies Based on Local Polynomials for Right-Censored Partially Linear Regression
Ahmed, Syed Ejaz; Aydın, Dursun; Yılmaz, Ersin (MDPI, 2022)This study aims to propose modified semiparametric estimators based on six different penalty and shrinkage strategies for the estimation of a right-censored semiparametric regression model. In this context, the methods ...
