pressf

powell code for matlab

考虑L的三个不同值：L＝256（3个数据段），L＝128(7个数据段)和L=64（15个数据段）。各自的谱估计图如上图所示。可以明显的看到，加窗明显的减小了频谱上的假谱峰，但也更加进一步平滑了谱峰。所以，对于L＝64的情况，在ω＝0.8π的谱线可以很确定的辨认，但是那两个靠近的谱峰不容易区分。对于L＝128的情况，这种情况提供了在分离和检测间最好的均衡。当然，对于在L＝256时的情况，效果是更好的，能够从谱估计图上明显的分辨出三条谱线的存在以及它们幅度关系的强弱。 除了Welch法外，还可以采用对多个周期图求平均的功率谱估计方法的其他方法如Bartlett法等等，在功率谱估计上也能取得较好的结果。(consider three different values : L = 256 (3 data), L = 128 (7 data) and L = 64 (15 data). Their spectral estimation map as shown in Fig. It is clear to see that increase significantly decreasing window of the spectrum of false peaks, but much more to further smooth the peaks. Therefore, L = 64, in the case = 0.8 spectrum can determine the identification, but that the two peaks around is not easy to distinguish. L = 128 for the situation, which provided the separation and detection among the best balanced. Of course, L = 256 in the case, the effect is better, from the spectral estimation map clearly distinguish between the three lines of the existence and their relationship to the rate of strength. In addition to Welch law, but also can be used to map multiple cycle for the average power)

两个关于子空间语音增强的算法，都是基于Loizou的文章的(Two on subspace speech enhancement algorithms are based on the article Loizou)

系统详细的介绍了matlab软件在各个领域中的应用以及其在科学计算语言中的应用(System is described in detail matlab software applications in various fields as well as their application in scientific computing language)

说明：  选择快速分析法，进行信号分离，所得到的结果，可以很好的与源信号相匹配。(Select the fast analysis method to separate the signal, the result can match the source signal very well.)

这是我收集到的最全的关于matlab程序实例应用，尤其对于学习数学的同学最有帮助。很牛的，有需要的我还可以再传一些。免费为有需求的人写程序。(This is my collection of the most complete examples of the application of Matlab procedures, especially for students studying mathematics most helpful. Niu is, I need the re-some can. Free for the demand for a written procedure.)

Symmetrical component analysis

USING MATLAB TO CREATE AN IMAGE FROM RADAR

介绍了如何通过matlab仿真软件进行电力系统仿真分析(Describes how matlab simulation software for power system simulation and analysis)

利用matlab绘制三维图形，有源程序和案例。比较适合初学者，及图形编制爱好者。(Draw three-dimensional graphics using MATLAB method and case study. More practical. There is a great help for beginners. )