ref-1-lsb-method

关于使用MATLAB工具FDATOOL设计滤波器的说明，包括m文件(desicription about using matlab tool FDATOOL to design FIR filter,including m file )

本程序实现多模态故障检测与故障诊断，用的方法是LPP_GMM_FJ，GMM是用的FJ算法，效果很好(This procedure realize multimodal, fault detection and fault diagnosis method is LPP_GMM_FJ, GMM FJ algorithm is used, the effect is very good )

采用积分器方法在 SIMULINK 上建立微积分方程的模型 (Modeling methods using integral calculus equations on SIMULINK)

这个是有限数字滤波器的设计程序，有低通高通，带通等滤波器设计。(This is a limited number of filter design process, a low pass high pass, band pass and other filter design.)

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)

射频滤波器 利用综合优化后产生的耦合矩阵 生成在hfss中自动建模的脚本文件 (The coupling matrix is produced using the optimized integrated RF filters are generated in the HFSS script file automatically modeling)

适合初学者使用的图像水印代码，代码不长，大约70行(Image Watermarking code for beginners)

产生一个正交相位调制信号（QPSK），该信号可供复数解析，调制相位为（0，pi/2,pi,3*pi/2）(have an orthogonal signal phase modulation (QPSK), which is available for complex signal analysis, Phase modulation (0, pi/2, pi, pi* 3/2))

求联合概率密度的matlab编程，可用于大部分数学或曲线拟合的场合(Seek the joint probability density)

说明：  改进的蚁群算法的实用性很强，解决了很多问题(Improved ant colony algorithm is very practical and has solved many problems.)