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In this paper we focus on two types of hydropower sources that offer the greatest potential for harvesting or scavenging the unused energy, namely, energy from urban water treatment and water supply systems, and energy from free-flowing waterways where there is existing infrastructure. The continuous flow of water in urban wastewater treatment and water supply systems provides an uninterrupted source...
The paper presents a novel universal offset based PWM method for 3f ac-ac matrix converter, whose characteristics can be controlled by the offset regulation. Typical characteristics of the offset based PWM control for the matrix converter will be described. The proposed PWM algorithm may help to simplify further study of PWM techniques for ac-ac matrix converter. Different variants of the offset functions...
Matrix converter is a single-stage Converter which directly connects a three- phase voltage source to a three- phase load without dc - elements. Therefore, the ac line side abnormal input can deteriorate its output characteristics. In this paper, the indirect space vector modulation method of the matrix converter is investigated and a feed-forward compensation technique to prevent the input voltage...
In this paper, we propose an efficient approach for real-time eye-gaze detection from images acquired from a web camera. The measured data is sufficient to describe the eye movement, because the web camera is stationary with respect to the head. First, the image is binarized with a dynamic threshold. Then geometry features of the eye image are extracted from binary image. Next using estimation method...
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