low-frequency-oscillation--analysis

matlab, this is Ljapunov (variant2) function for linear unstable system

Spectral analysis of discrete deterministic signals

设计音频降噪算法，并用MATLAB仿真实现。 1）读入一段音频后添加噪声，必须包括两种不同的噪声，信噪比：0dB~10dB； 2）分别采用滑动平均滤波器，直接频域滤波，以及谱分析后设计滤波器滤波三种方法实现，并对比效果。 3）给出各种方案的设计依据、代码、频响曲线，以及输入输出对比图。(Audio noise reduction algorithm design, and use MATLAB Simulation. 1) Read after adding noise into an audio, it must include two different kinds of noise, SNR: 0dB ~ 10dB 2) respectively moving average filter directly in the frequency domain filtering, and the filter is designed to achieve three methods filter after spectral analysis and contrast. 3) Give the design basis, code, frequency response curve, and input and output comparison chart of the various programs.)

说明：  用pso对bp神经网络进行优化，对pid控制器进行优化设计(Using PSO to optimize BP neural network and PID controller)

说明：  应用music算法和esprit算法在进行谱估计中的matlab源程序 (Music and esprit algorithm application in spectral estimation algorithm in the matlab source code)

卡尔曼滤波器设计的完整的MATLAB程序(Kalman filter design is complete MATLAB program)

说明：  利用matlab，实现插值滤波器的设计 有需要的朋友可以(Using matlab, realize the design of interpolation filters can have a friend in need)

说明：  matlab仿真的，功能是实现相关峰值的提取。能够在低信噪比下得到效果较好的相关峰(matlab simulation, feature extraction is to achieve correlation peak. Able to get better low SNR correlation peak)

罚函数法将有约束最优化问题转化为求解无约束最优化问题。在此给出罚函数法Matlab源程序(Penalty function method will be constrained optimization problem into solving unconstrained optimization problems. This gives the penalty function method in Matlab source)

信号稀疏表示，去噪处理，稀疏分解后重构性能非常好(Signal sparse representation, de-noising, sparse decomposition and reconstruction after the performance is very good)