2016
DOI: 10.1109/tkde.2015.2457911
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Ordinal Regression Methods: Survey and Experimental Study

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Cited by 351 publications
(273 citation statements)
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“…Other methods in the literature have not been included in the experiments because they are based on other classification paradigms (such as Gaussian processes [17]) or focused on other slightly different settings such as the transductive one [19,20] or ordinal 390 clustering [21]. Note that the ordinal version of Gaussian processes has been already compared to the ordinal version of kernel discriminant analysis, resulting in worst performance for real ordinal datasets with a much higher computational cost [11]. Finally, we include four different versions of our proposals (S-DL, CES-DL, ES-DL and KES-DL), where the main differences revolve around the 395 space in which the neighbourhood information is computed for the inclusion of unlabelled data and the use of a kernel learning strategy to optimise the kernel parameters.…”
Section: Methodologies Testedmentioning
confidence: 99%
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“…Other methods in the literature have not been included in the experiments because they are based on other classification paradigms (such as Gaussian processes [17]) or focused on other slightly different settings such as the transductive one [19,20] or ordinal 390 clustering [21]. Note that the ordinal version of Gaussian processes has been already compared to the ordinal version of kernel discriminant analysis, resulting in worst performance for real ordinal datasets with a much higher computational cost [11]. Finally, we include four different versions of our proposals (S-DL, CES-DL, ES-DL and KES-DL), where the main differences revolve around the 395 space in which the neighbourhood information is computed for the inclusion of unlabelled data and the use of a kernel learning strategy to optimise the kernel parameters.…”
Section: Methodologies Testedmentioning
confidence: 99%
“…Semi-supervised learning has being mainly studied for binary classification [5,6] and regression [2], al- 20 though recently the main focus has shifted to multi-class problems [7,8,9] (and even multi-dimensional ones [10]). This paper tackles the use of unlabelled data in the context of ordinal classification [11], a learning paradigm which shares properties of both classification and regression.…”
Section: Introductionmentioning
confidence: 99%
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“…Examples are found in such areas as operations research [3], genetics [4], environmental science [5], meteorology [6], psychology [7], and many others. One can find very large-scale MR problems, e.g., in machine learning [8][9][10] and computer simulations [11].…”
Section: Introductionmentioning
confidence: 99%