APF_Threelevel

基于MATLAB的短时傅里叶变换（STFT）的语谱图的画法，MATLAB环境下(MATLAB-based short-time Fourier transform (STFT) of the spectrogram of the painting, MATLAB environment)

说明：  swarm模型代码--3D 用matla开发，模拟集群功能(swarm model code- 3D with matla development, simulation cluster function)

QaM在加性高斯白噪声下的系统仿真模型，使用的是simulink(QAM in additive white Gaussian noise of system simulation models, using simulink)

genetic algorithm for an application of inverse synthetic aperture radar

matlab编写的视频关键帧提取程序，可自动从视频中提取帧，提取第几帧可在程序中自行设定，另附有批量处理视频的主函数。(matlab prepared video key frame extraction procedures can be automatically extracted from video frames to extract the first few frames can be set in the program, batch processing video attached with the main function.)

相场模拟晶枝生长，采用有限差分法计算，可更改参数获得不同结果(Phase field simulated dendrite growth)

说明：  使用ReliefF算法实现特征排序，进行特征选择，上传数据集为UCI乳腺癌数据。(The data set is UCI breast cancer data, and the ReliefF algorithm is used to sort its features to realize feature selection.)

點雲做三角連線，先找出一點，再找出最近兩點，並輸出成矩陣，使用三角外膜連線並畫出圖形。(Triangle nearest point connection Triangle nearest point of connection Triangle nearest point to connect the the triangle nearest point connection Triangle nearest point to connect the the triangle nearest point of connection triangle nearest point connection Triangle nearest point connection Triangle nearest point to connect the the triangle nearest point connection the triangle nearest point connection)

matlab中PCA-fisher判别法，对数据降维有很好的效果，附件中是matlab2007源程序，不同的matlab版本需要稍微修改一下；谢谢(Discriminant law PCA-fisher MATLAB, to reduce the dimension of data have a good effect, accessory is the MATLAB2007 source code, a different version of the MATLAB needs to be slightly modified thank you )

用于查找二维曲面的极值点，适用于波束方向图最大值及其坐标确定(determining the extreme point of 2-D curve )