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252   Chapter 9 Applications of deep learning in biomedical engineering
























                                                    Figure 9.5 Recurrent neural network.


                                    dealing with static and dynamic situations. The architecture can be
                                    highly recommended to classify time series data.
                                       RNN can provide insight feature, which can be utilized to
                                    modeling biological signals such as ECG and EEG. Some of the
                                    recent applications of RNN in biomedicine are as follows:
                                    1. Reconstruction of missing data from time series signals
                                    2. Finding the relationship between muscle activity and arm
                                       kinematics
                                    3. Real-time applications such as detecting glucose level of
                                       children
                                    4. Classification of biological signals
                                    5. Classifying snoring and nonsnoring signals
                                    6. Blood cell classification methods
                                    7. Sleep-stage segmentation [12]


                                    12. Generative adversarial networks
                                       GAN is an emerging technique of generative models. It can be
                                    employed for both semisupervised and unsupervised learning. It
                                    has been attained by modeling distributions of data with high
                                    dimension. GAN aims to generate new samples by learning the
                                    input data patterns. It consists of two types of network
                                    [13].They are as follows.

                                    12.1 Generator network

                                       It focuses on image generation. It takes the input as fixed-
                                    length random vector and produces samples. This vector acts
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