Speech recognition and speaker identification are important for authentication and verification in security purpose, but they are difficult to achieve. Speaker identification methods can be divided into text-independent and text-dependent. This paper presents a technique of text-dependent speaker identification using MFCC-domain support vector machine… (More)
Integration of active optical components typically serves five goals: enhanced performance, smaller size, lower power dissipation, higher reliability, and lower cost. We can differentiate between horizontal and vertical integration schemes. Horizontal integration combines many elements of the same functionality, like laser arrays. Vertical integration… (More)
Principle Component Analysis (PCA) is an important and well-known technique of face recognition, where eigenvectors are used. In this paper, we propose a face recognition technique, which combines Eigenvectors with Singular Value Decomposition (SVD) techniques to reduce size of the Eigen-matrix. The detailed theoretical derivation and analysis are presented… (More)
We report on a sampled grating DBR laser monolithically integrated with an electroabsorption modulator and semiconductor optical amplifier. A fiber coupled time-averaged power in excess of 3 dBm across a 40 nm tuning range and 2.5 Gb/s transmission over 200 km of standard fiber are achieved.
Three phase induction motor has proven to be an extremely reliable electromechanical energy conversion device for over 100 years. The speed control of induction motor is a crying need for the real world industrial applications. However, there are so many options available for the precise speed control of induction motor except by changing the frequency.… (More)
Vision-based systems for remote surveillance usually involve change detection algorithms for intruders, obstacles or irregularities detection. Real time applications require simple, fast and reliable algorithms for change detection methodology. Morphological change detection algorithm satisfies these requirements. Threshold is a very important issue for… (More)
—We report on the fabrication and operation of the first electrically pumped 1.55-m vertical-cavity laser array for wavelength-division-multiplexing applications. The array consisted of four channels operating between 1509 and 1524 nm. Wafer bonding was used to integrate GaAs–AlGaAs distributed Bragg reflectors with an InP–InGaAsP active region.
uoyant cable antennas (BCAs) are long, towed antennas used by submarines to receive RF signals. Deployed while the submarine is operating at depth, the cable is managed so that the internal antenna element or elements are positioned near the ocean surface. The received signal is sent to the submarine for processing over a transmission line within the cable.… (More)