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In this paper, by defining different error functions, two continuous-time models of Zhang neural net (ZNN) termed the ZNN-I and ZNN-II models are developed and investigated to solve for time-varying generalized inverse (i.e., Zhang generalized inverse, ZGI). In addition, comparing the ZNN models with the dynamic system proposed by Getz and Marsden (G-M), we show that such a G-M dynamic system can...
n this dissertation, we have provided a system of visualization for people's interest in music on social networks. This visualization system designed for interest in music on social networks provides several capabilities: (A) visualization for friends who share the same interest in music, (B) to group people who share the same interest in music into categories, and (C) to recommend songs function...
Compressed sensing has the potential to enable high-quality photoacoustic tomographic imaging using sparsely positioned ultrasonic transducers. As a result, the speed for image acquisition may be increased significantly due to less data flow and the cost be reduced because of the use of fewer transducers. We demonstrate that compressed sensing can be used for both time- and frequency-domain photoacoustic...
Pitch extraction is important for communication robots, since pitch may carry information about intention, attitude or emotion expression from the user's speech. However, current pitch extraction methods are not robust enough in real noisy environments. In the present work, we propose pitch extraction methods by combining microphone array and auditory scene analysis technologies, and evaluate pitch...
State-of-the-art III-V multijunction cells have achieved a record efficiency of 42.8%, which has fueled great interest in the utility sector for large-scale deployment. However, III-V solar cells have thus far proven too expensive for widespread terrestrial applications due to the combined cost of substrates, growth processes, and materials. Here, we propose a novel III-V solar cell based on the epitaxial...
A compact millimeter wave Vivaldi antenna array printed on thick substrate and fed by a substrate integrated waveguide (SIW) structure was proposed in this paper. It consists of a compact SIW binary divider, which has minimize significantly the feed structure insertion losses and achieve a broadband performance in millimeter wave range, and four-elements printed Vivaldi array. The whole antenna array...
In this paper we consider image reconstruction from multichannel phased array MRI data without prior knowledge of the coil sensitivity functions. A new framework based on multichannel blind deconvolution (MBD) is developed for joint estimation of the image function and the sensitivity functions in k-space. By exploiting the smoothness of the estimated functions in the spatial domain, we develop a...
In mobile communication, space is a very important domain to use. Two kinds of leading techniques are beamforming and STBC in MIMO system. This paper investigates the relation between beamforming and STBC at the capacity perspective. Both techniques can improve system performance at the cost of the capacity, which shows that they convert the matrix channel into a scalar AWGN channel. At low SNR, the...
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