An architecture is presented for low-cost and flexible realisation of image processing and analysis algorithms of binary images. The flexibility of the architecture is due to reconfigurable network of simple boolean f...
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An architecture is presented for low-cost and flexible realisation of image processing and analysis algorithms of binary images. The flexibility of the architecture is due to reconfigurable network of simple boolean functions. It is shown that this architecture can readily be implemented by low-cost off-the-shelf components. This is illustrated by some simulations of a hypothetical realisation.< >
Sufficient conditions for C-testability of one-dimensional CMOS iterative logic arrays without vertical outputs are given in the paper. Stuck-open faults in a cell are detected by pairs of input patterns with Hamming ...
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Sufficient conditions for C-testability of one-dimensional CMOS iterative logic arrays without vertical outputs are given in the paper. Stuck-open faults in a cell are detected by pairs of input patterns with Hamming distance 1. Procedure that generates pairs or triples of C-test vectors for a CMOS ILA is introduced. The flow table augmentation procedure which requires an addition of at most three columns to an original flow table and enables the design of C-testable CMOS ILA's is given.< >
A novel approach of wideband beamforming using FIR fan filters is presented. The method is based on two-dimensioal filtering for the outputs of a linear array of sensors. To beamform in the broadside of the array, sym...
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A novel approach to wideband beamforming using FIR (finite impulse response) fan filters is presented. The method is based on two-dimensional filtering for the outputs of a linear array of sensors. To beamform in the ...
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A novel approach to wideband beamforming using FIR (finite impulse response) fan filters is presented. The method is based on two-dimensional filtering for the outputs of a linear array of sensors. To beamform in the broadside of the array, a symmetrical 90 degrees /n filter is employed. The filter in which the angle of fan is more acute can form the narrower beam over the full band while the order of the filter becomes higher. To beamform in the direction along the array, an asymmetrical 45 degrees fan filter is used. As aliasing occurs in this beamforming, the band which is available is limited a little in width. A general implementation of the FIR fan filter beamformer is given as the parallel connection of one-dimensional FIR filters.< >
Kerr electro-optic field mapping measurements using the sensitive AC modulation method were made in liquid nitrogen. The steady-state electric fields between parallel stainless steel electrodes that had a gap of 7 mm ...
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Kerr electro-optic field mapping measurements using the sensitive AC modulation method were made in liquid nitrogen. The steady-state electric fields between parallel stainless steel electrodes that had a gap of 7 mm are shown to be essentially uniform for voltages up to 70 kV with no significant space charge distortion. The Kerr constant B of liquid nitrogen is constant over the AC modulation frequency range of 1-20 kHz, while increasing above 20 kHz. This change of B with the modulation frequency coincides with the frequency-amplitude gain characteristic of the lock-in amplifier used, so that B is independent of the AC modulation frequency within the range of this study. B monotonically decreases with increasing temperature, T, thus decreasing liquid nitrogen density, rho , so that B is related linearly to rho /T. The polarizability anisotropy of liquid nitrogen is evaluated to be 8.3*10/sup -41/ F-m/sup 2/ from the slope of the B-( rho /T) characteristic, obtained from a simple physical model.< >
Scheduling packets to be forwarded over a link is an important subtask of the routing process both in parallel computing and in communication networks. This paper investigates the simple class of greedy scheduling alg...
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electrical stimulation with weak constant direct currents is the treatment of choice for enhancement of wound healing. The use of a negative electrode placed in the wound has been reported to be successful in treating...
作者：
TREW, RJHigh Frequency Electronics Laboratory
Electrical and Computer Engineering Department North Carolina State University Raleigh North Carolina 27695-7911 Robert J. Trew received the PhD degrecin Electrical Engineering from the Uni-versity o l Michigan in 1974. From 1975 to 1977 he was employed by the Watkins Johnson Company in Palo Alto
CA where he was involved in the design and development of various microwave solidstate components. in 1977 Dr. Trew joined the faculty of North Carolina State University. Raleigh. NC. where he IS currently Professor of Electrical and Computer Engineering and Director of the High Frequency Electronics Laboratory. Dr. Trew's research interests are in the areas of microwaveimillimeter wave solid-state device modeling microwave device and circuit design and high frequency experimental characterization and parameter extraction techniques. Dr. Trew is a Fellow of the IEEE and a memhcr of Eta Kappa Nu. Sigma Xi and Tau Beta Pi.
A review of active device models for microwave CAD simulators is presented. Large-signal, nonlinear models are of particular interest. The basic techniques employed in deriving equivalent circuit and physically based ...
A review of active device models for microwave CAD simulators is presented. Large-signal, nonlinear models are of particular interest. The basic techniques employed in deriving equivalent circuit and physically based models are reviewed. Various methods for solving the semiconductor device equations to establish physically based models are indicated. Finally, it is proposed that physically based, analytic GaAs MESFET models offer an attractive compromise between simulation efficiency and quantitative accuracy. The use of such a model is demonstrated by several examples, including comparison with experimental data. These models are suitable for use in comprehensive CAD workstation environments and allow process-type device models to be interfaced directly with RF circuit simulators.
This work concerns the problem of broadcasting a large message efficiently when each processor has partial prior knowledge about the contents of the broadcast message. The partial information held by the processors mi...
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