The three-phase rectifier that adopted one-cycle control technique used in the aircraft is introduced in this paper. The One Cycle Control (OCC) principle and the operation principle of the rectifier are presented. The double loop control is adopted in this paper. According to the mathematical model and the simulation model construct the hardware circuit. The experimental results show that the total harmonic distortion of the input current is about 4.5%, and the power factor of the rectifier has reach to 99.15%, and achieve the design requirement.
Aimed to the difficult problem of detection information of video advertising from the massive video data, the novelty detection method of the video advertising based on the least squares support vector machine (LS-SVM) algorithm is introduced after analyzing and studying the feature of video advertising. The detection of the abrupt change shot and the gradual change shot in video data is realized by using color histogram algorithm, and the classification of the shot is achieved by using the particle swarm optimization and least squares support vector machine algorithm. The experiments show that the method based on the color histogram algorithm and LS-SVM algorithm has better Precision and recall, and can realize the accuracy detection of the video advertising.
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