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In this paper, we describe an improved system that visualizes the 3-D vibration modes on the device surface in quasi-real time without precision optical adjustment. We used three visible semiconductor lasers with adequately separated wavelengths. The incident angles of the lasers are set to detect the two in-plane vibrations and one out-of-plane vibration. A color video camera using three CCDs (red,...
Several kinds of values have been employed with respect to the diversification of individuality in the market. Some of these values are currently supported by only a few people, who are referred to as a ldquominority grouprdquo. However, there is the possibility that such groups will grow into majority groups with changes in historical background or people's sensitivity. It is both important and effective...
Mode shape measurement is pivotal to the success of any piezoelectric and non-piezoelectric resonator design. This paper describes an improved laser-speckle mode shape visualization system for measuring speckle images simultaneously generated on device surfaces using a red and a violet semiconductor lasers.
An enhanced reactance-domain estimation of signal parameters via rotational invariance techniques (RD-ESPRIT) algorithm is proposed for direction-of-arrival (DoA) estimation in the full-azimuth plane. Unlike the classical RD-ESPRIT algorithm, the proposed method employs a generalized RD correlation matrix combined with soft selection. The proposed algorithm is expected to allow estimating more than...
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