CODES-APR-2010

see guys here is the code refer and take it

此程序是matlab中有关平滑去噪中常用的小波包的程序，简单使用，其中的注释详细，对每个变量的注释都很清楚(Sen)

二次采样以确定像素间的相关性，然后对两个采样结果同时嵌入水印，利用的是倒谱变换(second sampling to determine the correlation between pixels, then the two sampling results also embedded watermark, make use of Cepstrum)

卷积运算：取x(t)和h(t)的长度为nx,nh。平移量n=nh+nx-1，利用for和if语句实现倒序求和运算。外循环用一个for语句实现平移，通过在求和时取数组元素的顺序实现倒序求和(Convolution operation: take x (t) and h (t) of length nx, nh. Translational volume n = nh+ Nx-1, use for and if statements to achieve reverse summation operator. Outside the circle with a for statement to achieve translation, when taken in sum array elements to achieve reverse the order of summation)

This is a matlab software package for butterworth band pass filter design. you could change the high pass and low pass frequency to design the betterworth filter.

提取音频信号的带宽，matlab源代码，仅供参考 (Extract audio signal bandwidth, matlab source code, for reference only)

Gemesa_E-diagram Gemesa_E-diagram Gemesa_E-diagram

大地电磁测深（MT）一维层状模型电阻率正演。计算不同频率的电阻率，反应电阻率随深度的变化。(Magnetotelluric sounding (MT) one-dimensional layered model of resistivity forward modeling. Calculate the resistivity of different frequencies, the reaction changes in resistivity with depth.)

Matlab环境下的基于平滑宽带信号的编程(Matlab environment based on the smooth programming of broadband signals)

计算自由空间FDTD程序，包括信号初始化和矩阵初始化和场计算(free space FDTD calculation procedures, including the initialization signal and matrix initialization and field calculation)