Signal_and_Systems_Lab_6

说明：  该代码完成用光流匹配法实现图像匹配，提供代码和参考图(The code to complete using the optical flow matching method for image matching, to provide the code and reference map)

1. 给一段原始的语音信号（可以是自己录制的一段语音），加上一频率为3.8kHz的高频余弦噪声和频率为3.6kHz的高频正弦噪声（幅度自己可以选择），用窗函数设计一滤波器（要求最小阻带衰减为50dB）对加噪后的语音信号进行滤波，画出滤波器的频率响应曲线，画出滤波前后的时域图和频谱图。 需要用到的函数： fir1 用窗函数设计FIR滤波器的函数 2. 用GUI设计一界面（如图1所示）完成如下功能： 1） 输入一语音信号，画出语音信号的时域图和频谱图； 2） 对语音信号加噪处理，画出加噪后的时域图和频谱图； 3） 给定滤波器的性能指标，采用几种不同的方法设计滤波器对加噪信后进行滤波，画出各滤波器的频率响应曲线，画出滤波后的时域图和频谱图。 (1. to some of the original speech signal (which can be a voice you record yourself), plus a cosine frequency of 3.8kHz frequency noise and frequency of 3.6kHz frequency sinusoidal noise (in the range that they can choose), with a window function to design a filter (requires a minimum stop band attenuation is 50dB) after adding noise to the speech signal is filtered, the filter frequency response curve to draw, draw diagrams and time-domain spectrum before and after filtering. Need to use the function: function fir1 with window function design FIR filter design 2. Using a GUI interface (Figure 1) complete the following functions: 1) an input speech signal, the speech signal in the time domain to draw graphs and spectrum 2) adding noise to the speech signal processing, draw diagrams and time-domain plus noise spectrum after 3) to set the filter performance, using several different methods designed to filter letter after adding noise filtering, draw the frequency response curve of each )

Photonic crystals are attractive optical materials for controlling and manipulating the flow of light. One dimensional photonic crystals are already in widespread use in the form of thin-film optics with applications ranging from low and high reflection coatings on lenses and mirrors to colour changing paints and inks. Higher dimensional photonic crystals are of great interest for both fundamental and applied research, and the two dimensional ones are beginning to find commercial applications. The first commercial products involving two-dimensionally periodic photonic crystals are already available in the form of photonic-crystal fibers, which use a microscale structure to confine light with radically different characteristics compared to conventional optical fiber for applications in nonlinear devices and guiding exotic wavelengths. The three-dimensional counterparts are still far from commercialization but may offer additional features such as optical nonlinearity require

卡尔曼滤波在boost电路中的应用simulink仿真(Kalman filter simulink in the boost circuit simulation)

采用matlab中的simulink模块编写的二阶倒立摆仿真程序，对象了解倒立摆和学习simulink的人很有帮助。(The second inverted pendulum simulation program written using Matlab Simulink module, object, inverted pendulum and helpful learning simulink people.)

混沌时间序列算法中进行FFT变换程序，求解平均周期及功率谱。(Chaotic time series algorithm the FFT transform procedure for solving the average cycle power spectrum.)

this project show the bearing selection

预测控制，DMC算法，对于理解预测控制原理非常有用的程序(Predictive control, DMC algorithm ，for understanding predictive control principle is very useful program)

纵横向拉开档次法的MATLAB实现，对于动态评价方法的编程实现(Vertical and horizontal method of MATLAB implementation, evaluation method for dynamic programming)

偏微分方程的Matlab解法，方便你使用MATLAB来解决偏微分问题！(Solution of Partial Differential Equations Matlab for you to use MATLAB to solve the partial differential problem!)