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Analyzed the structure and forming technology of the imported Benz Unimog car models gate. In order to improve the manufacturing efficiency, we reformed technologies in the traditional industrial production, such as mechanic, metal plate and studied the fractional-step forming stamping die of the car gate, in the reference of the cold stamping die. In this paper, we compared and analyzed the present...
In this paper, a phased array antenna system with a single receiver is proposed and Stochastic Parallel Gradient Descent (SPGD) algorithm is introduced to implement adaptive beamforming. In this system the power level of the output from the single receiver is the only criterion for beamforming. SPGD algorithm searches the optimum phase shift values of the phase shifters to produce a beam pointing...
According to the Fourier transform relationship between target scattering function in the space domain and the echoes in the wavenumber domain, the distribution of echoes in the wavenumber domain is inherently linked to both the bandwidth of transmitted signal and the configuration of the illuminators and receivers. Therefore, a multi-aperture passive radar imaging system, which consists of multiple...
Image segmentation is a key step in image processing and image analysis and occupies an important position in image engineering. In this paper, basing on maximum variance between-class, an adaptive and multi-objective image segmentation method is proposed. The concrete implement is to determine adaptively the optimum number of threshold of image using the idea of variance decomposition, while calculating...
A FBG-GMM dynamic strain measurement setup with ferromagnetic circuit was established based on the magnetostriction characteristic of Giant magnetostrictive material (GMM) and the susceptibility of fiber Bragg grating (FBG) to strain. This system was constructed using the FBG dynamic strain demodulating scheme of optical filter linear sideband. The finite element analysis and experimental result show...
The embedded wireless application for vehicle diagnosis is presented. The design uses an ATmega16 microcontroller as a master which controls the wireless RF transceiver module nRF905 to realize the wireless vehicle diagnosis function. The nRF905 module is used for signal transmission between diagnostic-tester and vehicle ECU. Diagnosis application software is also developed on the PC Windows platform...
Flow regeneration noise is a main reason effect on attenuation performance of mufflers, at present no sophisticated software or tool is found to predict effectively flow regeneration noises from mufflers. Prediction of flow regeneration noise from a muffler element of simple expansion chamber is realized using Bp neural network, and comparison of prediction with experiment is carried out. Results...
A new method to select a segment-to-segment matching by analyzing signature verification is presented, accordingly curve segments used in signature verification and the regional feature contained in the curve segment are picked-up and the regional features are selected by GAs. Namely, features selected are first encoded into chromosome, and descendible types are founded by GAs improved locally. A...
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