Based on parameterized algebraical method, the non-prefect reconstruction (NPR) biorthogonal wavelet is presented. According to the particularity of image edge detection process, the perfect construction condition is ...
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Free space optical communications have potential applications in the future global communication network. However, performance of free space optical communication is degraded by atmospheric turbulence. In this paper, ...
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The intelligent prediction of fault is an important and difficult modern technique in our world, and the Technique can assure the safe running of key equipment and improve the working condition of it. The Technique is...
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Traditional on-site fault diagnosis means cannot meet the needs of large rotating machinery for its performance and complexity. Remote monitoring and diagnosis technology is a new fault diagnosis mode combining comput...
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Traditional on-site fault diagnosis means cannot meet the needs of large rotating machinery for its performance and complexity. Remote monitoring and diagnosis technology is a new fault diagnosis mode combining computer technology, communicationtechnology, and fault diagnosis technology. The designed remote monitoring and diagnosis and prediction system for large rotating machinery integrates the distributed resources in different places and breaks through shortcomings as the offline and decentralized information. The system can make further implementation of equipment prediction technology research based on condition monitoring and fault diagnosis, provide on-site analysis results, and carry out online actual verification of the results. The system monitors real-time condition of the equipment and achieves early fault prediction with great significance to guarantee safe operation, saves maintenance costs, and improves utilization and management of the equipment.
In order to improve the performance of servo-valve and reduce its cost, a new type of piezoelectric hydroelectric servo-valve is developed. The electrical-mechanical converter of the servo-valve is constructed by piez...
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The focus of this investigation lies on controlling the lift generated in a 3D simulation of a three-element high-lift configuration using segmented actuation slots. The lift is controlled by adjusting the peak amplit...
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The transmission eigenvalue problem has important applications in inverse scattering theory. In this paper, based on the series solutions for the Hemholtz equation, we derived the solutions for the Maxwell's trans...
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Wireless channel capacity is an important indicator for a measure of mobile communications network to accommodate the largest number of users. The analysis and study on MIMO channels capacity is benifit to network'...
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Waveguides are structures consisting of geometrically identical subdomains, usually called periodic cells which have many practical applications, for example, optical communications, filters, lasers, and microwaves. F...
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On the basic of the representation of the principle of Doppler imaging, an echo model of high-speed target illuminated by broadband linear frequency modulated (LFM) signal was established in this paper. For high-speed...
On the basic of the representation of the principle of Doppler imaging, an echo model of high-speed target illuminated by broadband linear frequency modulated (LFM) signal was established in this paper. For high-speed target, because of its nonlinear echo phase and time-varying Doppler frequency shift, the Doppler spectrum of the target acquired by the traditional Fourier method was ambiguous, and the same in the radar images of the target. Therefore, an adaptive Wigner-Ville time-frequency analysis method was presented in the paper, that is, the local fuzzy function could be obtained by applying the two-dimensional adding Window Fourier Transform to signal's Wigner-Ville distribution, which made the kernel function, not only be adaptive to time, but also to the frequency. Finally, the simulation results show that the method has a good time-frequency concentration, and effectively control the cross-term interference.
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