app4

Hamming 7,4 MAP algorithm step by step explained.

dct隐写技术matlab实现资料。算法原理：通过在一个图像块中调整两个DCT系数的相对大小，隐藏秘密信息。 将载体图像分为8×8的块，做二维DCT变换 用来表示选中的两个系数的坐标对于第i bit秘密信息 if（要隐藏信息‘1’） make else make 逆DCT变换，还原图像 (dct steganography matlab implementation information. Algorithm principle: an image block by adjusting the relative size of the two DCT coefficients, hidden secret information. The vector image is divided into 88 blocks, making two-dimensional DCT transform coefficients used to represent the coordinates of the selected two for the first i bit secret information if (to hide information ' 1 ' ) make else make the inverse DCT, restore image)

使用Matlab编程实现发送端信源编码（图像压缩）和接收端信源解码（图像重建），其中的编解码算法可采用基于DCT变换的JPEG图像压缩标准；测试图像加噪，然后对去噪后的图像进行压缩与重建，分析压缩性能；研究基于下采样和内插的图像压缩算法；可将8bit/pixel灰度图像扩展至24bit/pixel彩色图像，或者采用无损压缩算法对图像压缩。(Sender using the Matlab programming source coding (image compression) and the receiver source decoding (image reconstruction), one of the decoding algorithm can be used DCT-based JPEG image compression standard test image with noise, then the denoised image compression and reconstruction, compression performance analysis of down-sampling and interpolation based on image compression algorithm 8bit/pixel grayscale images can be extended to 24bit/pixel color images, or the use of lossless compression algorithms for image compression. )

FDTD法模拟无源区域二维TE波的传播(Mur二阶吸收边界条件)(FDTD method to simulate passive regional 2D TE wave propagation (Mur absorbing boundary conditions))

Advances of Research in Independent Component Analysis

实现极化码的编码和译码算法，其中译码部分采用的是SCL算法来实现译码的。(Polarization code coding and decoding algorithm, including decoding part adopts the SCL algorithm to realize the decoding.)

从excel中提取数据，应用小波包分解提取特征频段能量值的matlab程序(Extracting data from excel, the wavelet packet is used to decompose the matlab program that can measure the value of the feature frequency)

捷联惯导系统的陀螺及加速度计数据发生器。(SINS gyro and accelerometer data generator)

埃尔米特插值和分段埃尔米特插值，对船体型线绘制及其局部光顺具有一定作用(Hermite interpolation and piecewise Hermite interpolation drawn shiplines its local fairing has a certain role)

这是一个SVM与ANN预测的代码，这个网站看起来不错，看起来不错(This is a prediction code of SVM and ANN. This website looks good and looks good.)