kalman

Matlab source code for DCT-based watermarking for grayscale images. DCT-based watermark recovering without resorting to the uncorrupted original image. Digital watermarking has been proposed as a viable solution to the need of copyright protection and authentication of multimedia data in a networked environment, since it makes possible to identify the author, owner, distributor or authorized consumer of a document. A new watermarking technique to add a code to digital images is presented: the method operates in the frequency domain embedding a pseudo-random sequence of real numbers in a selected set of DCT coefficients. Watermark casting is performed by exploiting the masking characteristics of the Human Visual System, to ensure watermark invisibility. The embedded sequence is extracted without resorting to the original image, so that the proposed technique represents a major improvement to methods relying on the comparison between the watermarked and original images.

说明：  详细的双馈发电机模型，包括变桨系统、偏航系统、控制系统、齿轮箱等。(Detailed model of doubly-fed generator, including the pitch system, yaw system, control system, gear boxes.)

it is so important file

用径向基神经网络和BP网络预测的源码，径向基神经网络优于BP网络预测。(With RBF neural network and BP network prediction source, RBF neural network is better than BP network prediction.)

基于optical flow的机器人导航和避障算法，并在一虚拟机器人进行了仿真。(This is a project where a virtual robot avoids obstacles in a virtual environment without knowing the environment- the robot navigates autonomously, only by analysing it’s virtual camera view. The algorithm for obstacle avoidance is optical flow based.)

《计算物理基础》是北师大彭老师写的，对学习用matlab解决物理问题很有帮助(this is a book about Computational Physics used matlab,the author is Mr peng and come from Beijing Normal University)

把雷克子波离散，对其做fft变换到频率域，然后滤波，再做ifft变换回时间域。(To Leike Zi wave dispersion, its to do fft transform into the frequency domain and then filter, do ifft transform back to time domain.)

Direct sequency spread spectrum

this code corospondes bwlableing in matlab

把信号分为重叠或不重叠的小段，对每小段信号序列进行功率谱估计，然后取平均值作为整个序列的功率谱(The signal into overlapping or non-overlapping short paragraphs, short paragraphs on each of the power spectrum estimation signal sequence, and then averaged Fourier power spectrum as a whole)