pcacov

实现了自动解方程的功能，并有详细的使用方法说明(Realize the automatic solution of functional equations, and have a detailed description of the use of methods)

Simple show in 3D model of Single-slit diffraction.

共轭梯度平方法的matlab代码，可用于解线性方程组(cgs method is used to solve linear functions)

说明：  Chec this options of transform in matlab

利用双线性变换法，设计一个0.4dB截止频率为10kHz且在30kHz处有最小阻带衰减为50dB的数字巴特沃兹低通滤波器，其抽样率为100kHz。利用教材（4.35）式求解原型模拟滤波器的阶数，并利用Matlab的M文件buttap设计模拟原型滤波器。用M文件bilinear将模拟滤波器传输函数变换成期望的数字传输函数。请用Matlab画出其增益和相位响应，并给出设计的具体步骤。(fuck!!!)

It is the document related to noise reduction

LEACH (Low Energy Adaptive Clustering Hierarchy) is designed for sensor networks where an end-user wants to remotely monitor the environment. In such a situation, the data from the individual nodes must be sent to a central base station, often located far from the sensor network, through which the end-user can access the data.

说明：  用于优化算法的萤火虫算法，整理和很多资料，很有用的(Optimization algorithm for fireflies, organize and a lot of information, very useful)

信号包络求法,此法为hilbert变换和微分法的matlab源程序，有注释；(envelope curve calculation)

基于TDOA定位，用卡尔曼滤波器的算法减小误差更准确地的去追踪和定位目标。(use the EKF algorithm to track the localization)