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stm32 平台下sht11 的完整程序。包含驱动(STM32 platform SHT11 complete program. Include drive)

说明：  基于FFT的谐波检测,采用快速傅里叶算法后得到原始波形中各次分量的频率和幅值特性，从中可以直接观测出各次谐波分量的频率和幅值信息. 程序1采用快速傅里叶算法后得到原始波形中各次分量的频率和幅值特性图 程序2输入信号经过FFT变换得到的频谱特性图 程序3对输入信号进行采样，应用一维小波变换函数进行三层小波分析(Based on FFT harmonic detection, the frequency and amplitude characteristics of each harmonic component in the original waveform are obtained by using fast Fourier algorithm, from which the frequency and amplitude information of each harmonic component can be directly observed In program 1, the frequency and amplitude characteristics of each component in the original waveform are obtained by using the fast Fourier algorithm The spectrum characteristic diagram of program 2 input signal through FFT transformation Program 3 samples the input signal and applies one-dimensional wavelet transform function to three-level wavelet analysis)

俄罗斯方块源程序 玩过俄罗斯方块的，都知道-Russian box source played the Russian box, we would have known

VC++演示如何实现ODBC异步调用，好像比较高级的数据库编程技巧，其实实现方法并不复杂，而且异步调用ODBC还可以解决很多普通模式下不能解决的问题。

多分布式电源的下垂控制器和PQ控制器设计(Design of droop controller and PQ controller for multi - distributed power supply)

说明：  i2c 测试demo，适用于i2c调试，可以适用示波器测量波形确认i2c是否通。(I2C test demo, suitable for I2C debugging, can be applied to oscilloscope measurement waveform to confirm whether I2C is passable.)

该软件使用于安卓系统，可使用该软件在线查询全国各省各市的天气情况，随时了解天气变化。(Reporting Weather)

GRNN神经网络模型 可以预测各类数据 只需要载入自己的数据即可运行(GRNN BP optimization algorithm)

大一c++练习题库，题库中有所需的填空题，选择题，改错题，以及程序设计题，可供大一学子参考(Freshman c++ exercises database, questions in the library filled questions, multiple choice, error correction, and programming problems, for freshmen reference.)

FFT 算法和功能测试，已经测试通过，可以直接使用-FFT