方向图

Abstract - In this paper, proposed an efficient method of converting speech codec formats between G.723.1 and G.729А. The proposed method is composed of four steps: LSP conversion, pitch conversion, adaptive codebook search and fixed codebook search. Subjective results shown that the proposed method has shorter delay than classical tandem method. ( Abstract- In this paper, proposed an efficient method of converting speech codec formats between G.723.1 and G.729А. The proposed method is composed of four steps: LSP conversion, pitch conversion, adaptive codebook search and fixed codebook search. Subjective results shown that the proposed method has shorter delay than classical tandem method. )

偏微分方程的matlab解方程的具体应用，速度快捷，并且用途很广泛(Matlab partial differential equations for the specific application, speed, fast, and is so widely used)

说明：  基于MATLAB平台与相场法的裂缝断裂模拟。有限元位移场与相场参数耦合后预测裂缝发展的倾向。裂缝发展基于格里菲斯断裂准则设计。(this code is used for simulating fracture development of structure based on phase field method.)

（实验）快速傅里叶变换及其应用。包含fft实验的所有源程序，实现fft的基本功能。((Experimental) Fast Fourier Transform and Its Applications. Contains all the source code of the fft experiment, to achieve the basic functions of the fft.)

永磁同步电机的直接转矩控制matlab/simulink模型，可用。效果不错。(matlab/simulink model of PMSM DTC method。)

这是一个基本的PCA方法实现人脸图像压缩与重建，可以非常快捷的将一些无法辨别的人脸图像进行快速的拼接。(This is a basic PCA method to achieve image compression and reconstruction of the face, can be very quick to identify the human face that can not be quickly spliced images.)

读取字符串，统一转换成小写后，删除相同的字符(Read the string converted to lower case after the reunification, delete the same character)

使用粒子群算法优化控制器参数，设计PD控制器。(The use of particle swarm optimization of controller parameters, design PD controller.)

说明：  针对给定信号采用不同的经典功率谱估计方法进行信号的谱估计，性能不错！(For a given signal using different classical power spectrum estimation methods for signal spectrum estimation, performance, good!)

Matlab 非均匀有理B样条函数，能生成B样条曲线和曲面(Matlab NURBS)