Speech Emotion Recognition (SER) is a new and challenging research area with a wide range of applications in man-machine interactions. The aim of a SER system is to recognize human emotion by analyzing the acoustics of speech sound. In this study, we propose Spectral Pattern features (SPs) and Harmonic Energy features (HEs) for emotion recognition. These features extracted from the spectrogram ...

Due to the ever-increasing in non linear loads and the worldwide trend to establish smart grids, harmonic level in the electricity grids is significantly increased. In addition to their impact on power quality, harmonic current can have a devastating effect on the operation of over current relays as they are designed to operate efficiently at the fundamental frequency. The distorted waveform wi...

A method for assessing the operation of analog filters installed in measuring paths current and voltage converters power supply system a mining machine motor, using example driving unit roadheader’s cutterhead, is presented. The suggested based on identification fundamental harmonic signals from sensors observed at input output tested filters, respectively. identified parameters before after fi...

Nowadays, AC distributed power networks are facing many challenges in guaranteeing and improving the required level of quality indices with increasing nonlinear, time-variable unbalanced loads. Power can benefit from avoiding minimizing different problems, such as frequency fluctuation Total Harmonic Distortions (THDs), by using filters, Hybrid Active Filters (HAPFs). Therefore, attention towar...

Applications of surface acoustic wave (SA W) and shallow bulk acoustic wave (SBA W) devices are reviewed. SA W-device coverage includes delay lines and filters operating at selected frequencies in the range from about 10 MHz to 11 GHz, modeling with singlecrystal piezoelectrics and layered structures, resonators and lowloss filters, comb filters and multiplexers, antenna duplexers, harmonic dev...

Electrical grid power quality is a global issue. The must supply electricity at sinusoidal voltages and currents without frequency or amplitude fluctuations. Harmonics from non-linear loads change the stable reference point voltage waveform cause other problems. Harmonic reduction essential for health. electronic equipment users, manufacturers, suppliers all contribute. This article presents ca...

Active filters have proven to be more effective than passive techniques to improve power quality and to solve harmonic and power factor problems due to nonlinear loads. This paper proposes a control scheme based on the instantaneous active and reactive power. The inverter of this active filter is a three-phase, two-level converter. Space vector technique is used as modulators and pattern genera...