This report summarizes our effort towards building a robust open-set speaker recognition system. It reviews the various techniques we have used for acoustic feature extraction, speaker modeling, scoring and score normalization, and presents experiment results. We have worked on all the modules of speaker recognition systems. At the front end, we have studied a variety of acoustic features and pre-/post-processing techniques, and have come up with a PPMD feature that ...
Under this MRI funded by HEL JTO and AFOSR, UCLA, in collaboration with Michigan Tech, Georgia Tech, MZA Associates Corporation, Tempest Technologies, Trex Enterprises Corporation, ATK Mission Research and the Air Force Institute of Technology (AFIT), has established a comprehensive research program in high-performance control of high energy lasers (HEL), modeling and simulation of HEL, wavefront sensing, and target tracking. Under this program, researchers have developed adaptive filtering and control ...
Passivation of GaAs (100) surfaces with chemical solutions containing P2s5 has been studied using photoluminescence, electrical tests(I-V, C-V), Auger electron and X-ray photoelectron spectroscopies, and scanning electron microscopy. The time stability of the interfacial passivation was a particular concern, and passivation protocols were developed to prolong the effects. The lifetime of passivation at contact interfaces were studied in particular. In addition, techniques to improve the uniformity of passivation and reduce ...
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