The steady increase in volume of current and future databases dictates the development of massive secondary storage devices that allow parallel access and exhibit high HO data rates. Optical memories, such as parallel...
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Recording and playback on a variety of high energy tape media have been simulated using a new 2-D vector Preisach model in a self-consistent calculation of the magnetization. Simulation results are compared against VS...
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Recording and playback on a variety of high energy tape media have been simulated using a new 2-D vector Preisach model in a self-consistent calculation of the magnetization. Simulation results are compared against VSM bulk measurements and experimental erasure data.
Experimental characteristics of monolithic In-AlAs/InGaAs HEMT mixers are presented together with a theoretical analysis. Experiments at W-band show a maximum conversion gain of 0.9 dB with 2 dBm of LO power level. Th...
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Experimental characteristics of monolithic In-AlAs/InGaAs HEMT mixers are presented together with a theoretical analysis. Experiments at W-band show a maximum conversion gain of 0.9 dB with 2 dBm of LO power level. This is the first demonstration of a monolithic HEMT mixer with conversion gain at W-band. The conversion gain dependence on LO power, RF frequency and gate bias is measured and compared with the theoretical predictions. Good agreement between the theory and experiment could be found.
A genetic algorithm is used to select the inputs to a neural network function approximator. In the application considered, modeling critical parameters of the Space Shuttle Main Engine, the functional relationships am...
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Algorithms for voice activity detection in the presence of vehicular noise and babble noise are presented. The voice activity detector (VAD) designed for vehicular noise is an improvement upon the VAD adopted for the ...
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Generally, calculation on transient stability takes much Colossal time. Such huge calculation time disturbs the real time analysis and control on power system. It is the purpose of this study that real time transient ...
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A bottom-up state-space size estimation algorithm for Petri nets (PNs) is described. The algorithm permits fairly arbitrary subnets and interconnections. State counting (SC) functions are associated with subnets and m...
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A bottom-up state-space size estimation algorithm for Petri nets (PNs) is described. The algorithm permits fairly arbitrary subnets and interconnections. State counting (SC) functions are associated with subnets and manipulated by the interconnections. As illustrated by a flexible manufacturing system (FMS) example, if no approximations of the subnets are needed, the state-space size estimation is exact. Other benefits include simple tabular representation of SC functions, and the ability to interject hand-computed results. While all conceivable PNs cannot be handled by any bottom-up method, the interconnection can be extended to permit analysis on a larger class of systems.< >
0.1 /spl mu/m Schottky-collector AlAs/GaAs resonant tunnel diodes were fabricated; from their measured DC and microwave parameters, and including the effect of the quantum well lifetime, a maximum frequency of oscilla...
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0.1 /spl mu/m Schottky-collector AlAs/GaAs resonant tunnel diodes were fabricated; from their measured DC and microwave parameters, and including the effect of the quantum well lifetime, a maximum frequency of oscillation of 900 GHz is computed. To the authors' knowledge this is the highest reported for any AlAs/GaAs resonant tunnel diode.< >
It is shown that fractal dimension estimates and Gabor wavelet coefficients are valid features of segmenting high-resolution polarimetric synthetic aperture radar imagery. Results of training a radial basis function n...
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It is shown that fractal dimension estimates and Gabor wavelet coefficients are valid features of segmenting high-resolution polarimetric synthetic aperture radar imagery. Results of training a radial basis function neural network using fractal dimension features, Gabor wavelet coefficients, and a combination of both fractal and Gabor wavelet features are presented. Current research into combining these two techniques both theoretically and empirically is presented. One-foot resolution polarimetric synthetic aperture radar imagery is successfully segmented into culture, tree, field, and shadow regions.< >
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