junhenghu-

解非线性方程 能过解复根 实根 但需要逼近(help you save equation conclude different answer)

说明：  matlab教程 提供详细的技术说明，并附上源代码(matlab tutorials provide detailed technical description, together with the source code)

Simulation of three phase harmonics Phase Locked Loop (PLL)

阵列声源声场模拟的matlab程序（包括声柱，同相点声源等）( simulation of spk arriys’acoustic performance )

针对电压暂降的问题,按照“DVR系统设计→检测算法研究→控制方法研究→系统建模→结果分析→硬件实现”的思路,利用参数模糊自整定PID控制方法,对三相无串联变压器型DVR进行控制,实现了对系统电压暂降快速、准确的补偿。(Aiming at the problem of sags, a fuzzy PID control strategy is proposed to the transformerless DVR following the idea of “DVR system→detection algorithm→control strategies→system modeling→results analysis→hardware implementing”. )

多方向灰度变换源代码（本子程序为单方向，多方向修改一下即可）(Multi-directional gray transform source code (book program for single-direction, multi-directional modify click))

用matlab的9个编程例子附程序，可以更好的理解掌握MATLAB，供大家学习与交流。(9 programming example attached matlab program, you can better understand and grasp the MATLAB for everyone to learn and exchange.)

关于白噪声的仿真程序，有功率谱及fft的变换等，很有用(About the white noise simulation program, a power spectrum and FFT transformation and so on, is very useful )

采用距离环法对地杂波进行建模并仿真其功率谱(model ground clutter by ranging ring and simulate its power spectrum)

SIMPSON S 1/3RD INTEGRATION RULE