摘要 :
At present, there are various methods of fire detection. The pure software-based fire identification systems have problems such as higher requirements on the hardware system, identification jams and poor efficiency etc. The rapid ...
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At present, there are various methods of fire detection. The pure software-based fire identification systems have problems such as higher requirements on the hardware system, identification jams and poor efficiency etc. The rapid development of FPGA (Field Programmable Gate Array) and processor combination technology provides a new solution for fire detection based on video images. The system completes the FPGA system architecture construction through the combination of software and hardware. We use the inter-frame difference method of the image R (Red) component and LK (Lucas-Kanade) pyramid optical flow method for the early image extraction and judgment, and later introduce the image processing methods such as the median filter, mean filter, Gaussian filter and grayscale processing etc., so as to realize the soft-core design and packaging of the flame recognition FPGA. Finally, the identification and boundary calibration of the flame in the video are simulated by MATLAB, and the detection process is fast and accurate. The method is realized by building FPGA and Nois II video capture system, which provides an effective solution for rapid fire identification.
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摘要 :
Aiming at the problem of optimizing the structural of X-band standing wave accelerator with multi-parameter, a method for automatic cavities structure optimized and based on genetic algorithm was proposed in this paper. In this me...
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Aiming at the problem of optimizing the structural of X-band standing wave accelerator with multi-parameter, a method for automatic cavities structure optimized and based on genetic algorithm was proposed in this paper. In this method accelerated structure model was built with multi-parameter, using MATLAB and electromagnetic stimulation software CST to work together to optimize multi-parameter structure, and an accelerated structure with high shunt impedance had been obtained. Compared with traditional single variable debug, plenty of time is saved, and design efficiency is improved. In addition, this method adds a function of stabilizing frequency which made the optimization process more intelligent and the optimization results more accurate.
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摘要 :
Aiming at the problem of optimizing the structural of X-band standing wave accelerator with multi-parameter, a method for automatic cavities structure optimized and based on genetic algorithm was proposed in this paper. In this me...
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Aiming at the problem of optimizing the structural of X-band standing wave accelerator with multi-parameter, a method for automatic cavities structure optimized and based on genetic algorithm was proposed in this paper. In this method accelerated structure model was built with multi-parameter, using MATLAB and electromagnetic stimulation software CST to work together to optimize multi-parameter structure, and an accelerated structure with high shunt impedance had been obtained. Compared with traditional single variable debug, plenty of time is saved, and design efficiency is improved. In addition, this method adds a function of stabilizing frequency which made the optimization process more intelligent and the optimization results more accurate.
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摘要 :
The structural damages, which result from the inadequate bearing capacity or the asymmetric support of foundation, are one of the crucial works in the conservation of historical masonry constructions. A new underpinning technique,...
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The structural damages, which result from the inadequate bearing capacity or the asymmetric support of foundation, are one of the crucial works in the conservation of historical masonry constructions. A new underpinning technique, applying the principle of pipe-jacking, is presented in this paper, which can build a new foundation system having sufficient rigidity under the bearing wall of the upper building. The technique has been successfully used in the conservation practices of masonry constructions, but the basic problems involved in the technique has not yet studied. Based on the field test, the principle of the underpinning by manual pipe-jacking, the mutual effect mechanism between box girders and soil, the calculation of jacking force and its influence factors are investigated in detail, and the empirical formula of calculating jacking force is also presented.
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摘要 :
The structural damages, which result from the inadequate bearing capacity or the asymmetric support of foundation, are one of the crucial works in the conservation of historical masonry constructions. A new underpinning technique,...
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The structural damages, which result from the inadequate bearing capacity or the asymmetric support of foundation, are one of the crucial works in the conservation of historical masonry constructions. A new underpinning technique, applying the principle of pipe-jacking, is presented in this paper, which can build a new foundation system having sufficient rigidity under the bearing wall of the upper building. The technique has been successfully used in the conservation practices of masonry constructions, but the basic problems involved in the technique has not yet studied. Based on the field test, the principle of the underpinning by manual pipe-jacking, the mutual effect mechanism between box girders and soil, the calculation of jacking force and its influence factors are investigated in detail, and the empirical formula of calculating jacking force is also presented.
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