The dynamic behavior of a neural network is demonstrated by its interconnection weighted matrix. In this paper, we present a Feature Enhanced Interpattern Association (FEIPA) neural network model which is sensitive to...
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ISBN:
(纸本)0819412759
The dynamic behavior of a neural network is demonstrated by its interconnection weighted matrix. In this paper, we present a Feature Enhanced Interpattern Association (FEIPA) neural network model which is sensitive to special features of reference patterns in the reconstruction. We think of the common part of the stored patterns as redundance and discard its contributions in the associating process. It is equal to enhance the role of special features of the reference pattern in the IWM and in the reconstruction procession. Therefore the IWM of FEIPA is well-distributed and the output before threshold is a little more uniform than that of IPA model. A 2D (8 X 8) opticalsystem is constructed using lenslet array as interconnection to realize the FEIPA model. Digital simulation and experiment results are provided.
作者：
CHEN, RYZHEJIANG UNIV
DEPT OPT & SCI INSTRUMENT ENGNNATL MAJOR LABHANGZHOU 310027PEOPLES R CHINA
A Vicker M55 inverted microscope (Vickers Instrument, U.K.) with a stage upward at the top is refitted for normal indentation and scratch indentation tests of epoxy coating debonding induced by indenters of tungsten c...
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ISBN:
(纸本)0819412481
A Vicker M55 inverted microscope (Vickers Instrument, U.K.) with a stage upward at the top is refitted for normal indentation and scratch indentation tests of epoxy coating debonding induced by indenters of tungsten carbide (WC) spheres and cones on the soda-lime glass substrates. A special designed apparatus assembled on the microscope stage can load the indenter quantitatively onto the coating and the amounts entering into the coating of indenter can be read out by an alignment microscope. The model system of the coating/substrate combination between the indenter and the objectives of Vicker microscope can be slide by handle and motor with velocity of 0.8 mm/min. Lots of experiments are done with satisfactory results by the use of the refitted microscope.
Radiographic image simulations using a spectrum simulation system SPECTRA are presented. SPECTRA calculated the x-ray spectra using the data of tube voltage and current obtained from a soft flash x-ray generator. The ...
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ISBN:
(纸本)0819412511
Radiographic image simulations using a spectrum simulation system SPECTRA are presented. SPECTRA calculated the x-ray spectra using the data of tube voltage and current obtained from a soft flash x-ray generator. The x-ray generator used in the present work consisted of a high-voltage power supply, an oil condenser of 10 nF, a turbo molecular pump, a thyristor pulser as a trigger device, and a cold-cathode triode. After the main condenser was charged from 60 to 80 kV, the electric charges in the condenser were discharged. We obtained the maximum tube voltage which was equivalent to the initial charged voltage in the condenser. Bremsstrahlung x-ray intensities were derived from the Kramers' empirical equation and the intensities of the characteristic x rays were approximately calculated on the basis of the experimental results by Birch and Marshall. In the present work, we used two 3-dimensional models provided by SPECTRA as radiographed objects. We saved the measured data of the tube voltage and current for the flash x rays with charged voltages of 60, 70, and 80 kV. Then, assuming that these flash x rays were applied to the above models at a distance of 1 m, we obtained simulated images with filtration of aluminum. The obtained images fairly agreed with real radiographs which were achieved with a Computed Radiography system.
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