A new system to segment and label CTrMRI brain slices using feature extraction and unsupervised clustering is Ž . presented. Each volume element voxel is assigned a feature pattern consisting of a scaled family of differential geometrical invariant features. The invariant feature pattern is then assigned to a specific region using a two-stage neural network Ž . system. The first stage is a self...

Data envelopment analysis (DEA) is a useful mathematical tool for evaluating the performance of production units and ranking their relative efficiency. In many real-world applications, belong to several separate groups also consist sub-units. this paper, we introduce new method group efficiency two-stage systems. To end, some DEA models are introduced systems based on average weakest criteria. ...

Sleep is an essential process for the body that helps to maintain its health and vitality. The first stage in diagnosis treatment of sleep disorders staging. Due complications manual staging by physician, computer-aided classification algorithms are gaining attention. In this study, a novel approach was introduced extract distinctive representations from single-channel EEG signal automatic Stan...