Brno University of Technology

About: Brno University of Technology is a education organization based out in Brno, Czechia. It is known for research contribution in the topics: Computer science & Fracture mechanics. The organization has 6339 authors who have published 15226 publications receiving 194088 citations. The organization is also known as: Vysoké učení technické v Brně & BUT.

End-to-end DNN Based Speaker Recognition Inspired by i-vector and PLDA

Abstract: Recently several end-to-end speaker verification systems based on deep neural networks (DNNs) have been proposed. These systems have been proven to be competitive for text-dependent tasks as well as for text-independent tasks with short utterances. However, for text-independent tasks with longer utterances, end-to-end systems are still outperformed by standard i-vector + PLDA systems. In this work, we develop an end-to-end speaker verification system that is initialized to mimic an i-vector + PLDA baseline. The system is then further trained in an end-to-end manner but regularized so that it does not deviate too far from the initial system. In this way we mitigate overfitting which normally limits the performance of end-to-end systems. The proposed system outperforms the i-vector + PLDA baseline on both long and short duration utterances.

Interpreting area of pinched memristor hysteresis loop

Abstract: It is shown that the area of the pinched hysteresis loop of the current-controlled ideal memristor represents the quantity `content', which was introduced into the theory of nonlinear systems by Millar in 1951. Two parts of the content are identified which correspond to distinct parts of the area below the v-i characteristic of the memristor: one is related to the power conditions and the other to the instantaneous state of the memristor memory. It is demonstrated for a memristor driven by the sinusoidal current that the power part of the content depends on the fundamental harmonic of the voltage, whereas the memory part of the content is given only by the higher harmonics of the voltage, and only by the even harmonics in the case of entirely closed loops. The analogous conclusions also hold for the voltage-controlled memristor.

Survey of distance laboratories in power electronics

Abstract: The paper presents an overview of the current state of development of distance and virtual laboratories in Electrical Engineering with a special attention to the fields of Power Electronics and Electrical Drives. Based on a broad overview of the open Internet resources from fields of Electrical Drives and Power Electronics and taking into consideration the ideas presented recently at conferences and published in journals and own experiences, the challenges and ways of future development of e-learning in the presented fields are sketched. This survey brings an overview of the contents of real experiments of the remote controlled laboratories that are placed at various universities. A special care is devoted to preparation of the learners to experimentation, including examining their knowledge before joining to the experiment. In the Appendix a complete survey of distance laboratories is given.

Design of magnetorheological damper with short time response

Abstract: For efficient fast control of suspension systems with magnetorheological dampers controlled by semi-active algorithms, the time response of the magnetorheological damper is one of the most importan...