15 research outputs found
A New Model for the Secondary Goal in DEA
The purpose of the current paper is to propose a new model for the secondary goal in DEA by introducing secondary objective function. The proposed new model minimizes the average of the absolute deviations of data points from their median. Similar problem is studied in a related model by Liang et al. (2008), which minimizes the average of the absolute deviations of data points from their mean. By using two well known data sets, which are also used by Liang et al.(2008), and Greene (1990) we compare the results of the proposed new model and several other models
A New Classification Approach Based On Support Vector Regression For Epileptic Seizure Detection
Although the classification problem is a subject that has been studied by researchers for a long time, it is still up-to-date. Especially the problems that image processing and diagnosis of disease are some of the most current application topics. This study presents a new data classification method based on support vector regression and mathematical programming. The proposed method consists of a two-stage hybrid structure. In the first step, the classification score is obtained for each unit with the support vector regression equation. In the second stage, using the classification scores of the units, a classification rule is created with the help of a mathematical model and the classification of the units is provided. The proposed method offers an alternative innovation to traditional methods. Methods based on traditional mathematical programming separate classes with a linear function. This situation limits the use of algorithms based on mathematical programming. The proposed method can be used in all linear or non-linearly separable data structures, as well as easily transforming into problem types with more than two groups. The model is first examined with simulation and then applied to the classification problem of Electroencephalograph (EEG) signals and the classification performance was compared with existing methods. The results obtained are given in the tables and it is shown that the proposed model can be an alternative to the existing algorithm