shuru1

恒频恒压(CVCF)逆变电源的输出电压波形质量是衡量其性能的重要指标之一。文章采用一种重复控制和双闭环控制相结合的电压波形控制策略，以重复控制器提高逆变电源输出电压的稳态精度，减小总谐波畸变率；以双闭环控制器达到较快的动态响应速度。该方案在一台采用TMS320F240 DSP控制芯片的50 Hz三相PWM逆变器上得到验证。(Constant voltage constant frequency (CVCF) Inverter output voltage waveform quality is an important measure of its performance indicators. Paper using a repetitive control and the combination of double closed loop control voltage waveform control strategy to improve the repetitive controller output voltage inverter steady-state accuracy and reduce total harmonic distortion to achieve a faster dual-loop controller dynamic response speed. The program uses TMS320F240 DSP in a 50 Hz phase control chip PWM inverter has been to verify.)

以图像处理和knn算法为基础，利用knn算法，在python开发环境中设计了一个手写数字识别系统，该系统采用28*28的模板对图新分成784块提取手写数字的784个特征，在二值图像数据基础上，通过朴素贝叶斯分类器算法，对0~9这十类手写数字进行学习和分类。(Based on image processing and KNN algorithm, a handwritten digit recognition system is designed in Python development environment by using KNN algorithm. The system uses 28*28 template to divide the graph into 784 blocks to extract 784 features of handwritten digits. On the basis of binary image data, it learns and classifies the ten types of handwritten digits, 0-9, through Naive Bayesian classifier algorithm.)

duffing振子的安全盆做法,运用Fortran软件运行，很方便，很实用，对学习非线性方面的同学很有帮助(duffing osillator for the safe basin)

说明：  The reference communication system for Orthogonal Time Frequency Space modulation

使用多媒体定时器，VC++精选编程学习源码，很好的参考资料。(Using multimedia timer, VC++ select learning programming source code, a good reference.)

说明：  MAX5980 四路，IEEE 802.3at / af PSE控制器 用于以太网供电(MAX5980 Quad, IEEE 802.3at/af PSE Controller for Power-over-Ethernet)

说明：  空间平滑music处理相干信号，相干信号的常用处理方法(Spatial smooth music processing coherent signal, coherent signal processing method)

stm8低功耗单片机，设置IO进行串口工作模拟，值得一看(This is a C++ compiled calculator source code, to achieve advanced computing functions, the interface is a bit rough, you can see the idea, thank you.)

说明：  Ho, K. C. , X. Lu , and L. Kovavisaruch . "Source Localization Using TDOA and FDOA Measurements in the Presence of Receiver Location Errors: Analysis and Solution." IEEE Transactions on Signal Processing, 2007, vlo.55, pp. 684-696)论文中传感器参数误差下的TDOA定位(Ho, K. C. , X. Lu , and L. Kovavisaruch . "Source Localization Using TDOA and FDOA Measurements in the Presence of Receiver Location Errors: Analysis and Solution." IEEE Transactions on Signal Processing, 2007, vlo.55, pp. 684-696))

this code will be useful in doppler effect simulation.a very useful code to say.