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vt8500 update software tool user guide

使用field ii包编写的界面程序，可以仿真相控阵超声成像(Use field ii packet interface prepared program can simulate phased array ultrasound imaging)

MUSIC算法matlab代码。文件中给出了基于MUSIC算法进行阵列信号估计的程序(MUSIC algorithm matlab code. Documents given array signal based on MUSIC algorithm for estimation procedure)

说明：  用matlab建立任意桁架模型，计算节点矩阵，约束矩阵等(Using matlab to establish any truss model, compute node matrix, constraint matrix, etc.)

用HOMER软件画出的某地区一年每小时的光照，将其导出为文本格式，可导入到MATLAB中供研究人员使用(HOMER software to draw an area with a light year per hour, export it to a text format that can be imported into MATLAB for researchers)

说明：  关于短波通信中多径的Matlab仿真代码(On short-wave communications in multi-path simulation of Matlab code)

matlab学习的相关例程，供大家学习参考，希望多多交流，共促进步！(Matlab learning related routines for people to study, reference, hope more exchange, total promote steps)

5节点潮流计算，牛顿拉夫逊，如果需要多节点的话，自行改设参数(5-bus power flow calculation, Newton Raphson, if you need multi-node, then re-established parameters of their own)

线性最优状态调节器，一阶系统，Riccati方程的求解(Linear optimal state regulator, first-order system, Riccati equation)

雷达信号瞬时自相关处理，计算信号瞬时频率，计算雷达信号参数等(instant auto-corelation)