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Concentrated windings permanent magnet machines are becoming a promising choice in aircraft generator application due to their advantages of compact structure, small short-circuit current and high power density. In this paper, the concentrated-windings permanent magnet synchronous machines (CW-PMSM) with four different types of rotor structure are investigated for the application of the aircraft starter/generators...
Iris location is an essential step and an important part in an iris recognition system. However, traditional iris location methods often involve a large space of search, which is calculation wasting and sensitive to noise. And these methods adopt circular orientation to locate the pupillary boundary; it may lead to inaccurate location result and influence the subsequent feature extraction and recognition...
For personal identification, iris recognition is an excellent biometrics method with high accuracy, but it is very difficult to acquire good-quality iris images in real time. In order to make iris recognition more convenient to use, we design an iris recognition system at a distance about 30 centimeters. There are five key modules to design such a system, including image focusing, iris images acquisition,...
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