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—In this paper, a robust secure spread based image watermarking scheme based on 3-dimensional discrete cosine transform(3D-DCT) is proposed for copyright protection. Firstly, the color image is divided into 3-D blocks, and then these blocks are transformed into transform domain by 3D DCT transform, finally, the generated pseudo random sequence, as the(More)
The mathematical model of DC(direct current) motor as the controlled object is established in this paper,and combines the algorithms of the neural network and PID control.With the self-learning function of the neural network,the self-tunings for parameters of PID are realized. This method can overcome disadvantages of PID as parameters which are difficult(More)
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