sound_check_by_MCU

离散傅立叶反变换 (ＩＤＦＴ)及其快速算法 (ＩＦＦＴ)通常是针对一般的复数序列定义和推导的 , 而在实际应用中 ,进行时频分析的信号大多是实数信号 ,即实序列。 是基于C语言编写的基于时间抽取的基二实序列FFT傅里叶变换算法和IFFT傅里叶反变换算法。

经典MUSIC算法估计来波方向，通过谱峰搜索获得，不同阵元数和信噪比会影响估计结果。

研究生期间上《数值计算方法》课的作业，所有代码都是C语言实现并调试通过，现在上传为大家服务。这是Jacobi算法-Jacobi algorithm with C language

信息论中唯一可译码的判断，比较实用。学习信息论的同学可以参考。-Information theory can only decode the judge, more practical. Learning students can refer to information theory.

一个黄金分割法求最优区间-golden section method

近年数学建模竞赛优秀论文，具有较大参考价值-Mathematical Contest in Modeling in recent years excellent papers, with a larger reference value

神经网络BP改进算法：对开发神经网络BP算法的人员大有帮助-neural network algorithm improvements : the development of neural network algorithm greatly assist the staff

       Dual Tone Multi Frequencies (DTMF tones) are two different tones at two ends of a spectrum that are used to send information in telephonic communication mediums. The tones represent numbers 0-9 and the symbols * and #. A series of these numbers may be assigned to individuals as points of contact, as in a phone number, or the numbers can be used to relay other sorts of information.       While it may seem confusing, it should be noted that all numbers on a telephone are assigned two DTMF tones, and in all, seven different frequencies are assigned. Some numbers will have the same lower frequency, but different higher frequency, while others will have the same higher frequency but a different lower frequency. The range is between 697 Hz and 941 Hz for the lower frequencies and 1209 Hz and 1633 Hz for

LZW压缩算法和RLE压缩算法的实现源码及Demo。本Demo未经过严格测试，请先保存待压缩文件再进行压缩测试。其中实现了LZW和RLE算法的编码和解码的压缩比、时间等性能指数的计算。

这个Matlab的m代码解决了薛定谔方程，沿着带宽频率和相位偏移，显示三维图像。-The Matlab m-code to solve the Schrodinger equation along the bandwidth of the frequency and phase offset, showing three-dimensional image.