NodeAdmittanceMatrix

说明：  三点最小覆盖圆法,给出三点坐标，可以求得其三点的最小覆盖圆的圆心坐标和半径(mincircle of three points)

因子分析法matlab源代码，能将为数众多的原始指标变量经过分析综合为少数几个公共因子变量,从而大大减少计算的复杂度。(Factor analysis matlab source code, can go through a large number of original indicator variables comprehensive analysis to a few common factor variables, thus greatly reducing the computational complexity.)

这是一个相对完整的OFDM通信系统的仿真设计，包括编码，调制，IFFT，上下变频，高斯信道建模，FFT，PAPR抑制，各种同步，解调和解码等模块，并统括系统性能的仿真验证了系统设计的可靠性。 (This is a relatively complete OFDM communication system simulation design, including coding, modulation, IFFT, and down conversion, Gaussian channel model, the FFT, PAPR suppression, and a variety of synchronization, such as demodulation and decoding module and system performance omnibus The simulation results show the reliability of system design.)

(1) 在某些无线信道中，多普勒频移会引起无线信道输出信号的混叠。请描述产生混叠的各种原因； (2) 无线信道中的多普勒谱有一种经典谱(classic spectrum)，请解释产生这种谱形状的机理； (3) 请用Simulink工具编写代码(S-Function方式)，产生一单径瑞利信道，其多普勒谱为经典谱，其中移动速率为120km/h。并请回答：证明自己用计算机产生的经典谱是正确的可能方法。 ((1) in certain wireless channel, the Doppler frequency shift will be caused by wireless channel output signal aliasing. Please describe the resulting aliasing of a variety of reasons (2) wireless channel Doppler spectrum there is a classical spectrum (classic spectrum), please explain such a spectral shape of the mechanism (3) Please use Simulink tools for writing code ( S-Function mode), resulting in a single Path Rayleigh channel, the Doppler spectrum for the classical spectrum, including mobile rate of 120km/h. And please answer: prove that they used computer-generated classical spectrum is correct possible ways.)

对30*30的bin行数据进行立体可视化显示，程序中数据的大小可以进行任意修改(30* 30 of the bin on the line three-dimensional data visualization, the size of the program data can be freely modified)

duffing混沌振子的实现代码，以及绘制duffing系统分岔图的源代码，matlab程序。(duffing chaotic oscillator realization of the code, as well as the bifurcation diagram drawing duffing system source code, matlab procedures.)

ARX model for a exchenger from daisy site

matlab socket example

永磁同步电机无速度传感器滑模控制论文，基于改进卡尔曼滤波的无速度传感器探究_张海刚(Speed Sensorless Sliding Mode Control of Permanent Magnet Synchronous Motor)

buck电路的matlab仿真，单环控制(matlab simulink of buck circuit)