outdated_part_AF

用51实现播放音乐盒可以烧入51单片机中实现。播放音乐等，(Playing Music Box with 51)

说明：  it680pdf hdmirx mainmcu

说明：  期望最大化算法。假设数据服从高斯分布时，用于寻找全局最优解。(Expectation-Maximization algorithm)

将调制信号通过Hilbert变换，解调出低频信号(Demodulating the low frequency signal through the modulation signal through the Hilbert transform)

说明：  粒子群优化极限学习机的参数。最佳粒子位置即为最优输入权值和隐层阈值。自己跑过的，放数据匹配一下就可以用(PSO optimizes the parameters of extreme learning machine. The optimal particle position is the optimal input weight and hidden layer threshold. Run their own, put data matching can be used)

华为内部程序设计培训,对c++语言规范的一些解释说明。-Huawei internal procedures in designing the training, the c++ Language specification of a number of explanations.

认知无线电，宽频带频谱感知算法仿真。包括频谱感知算法，信号建模，仿真图(cognitive radio. wide frequency band spectrum sensing, including algorithm, modeling, figures)

说明：  大型通用有限元软件ansys的一些入门实例分析，命令流(Some examples of large general finite element software ansys, command flow)

说明：  A new ocfjdfn picitisfdcxdvccd!

说明：  防风栏设置udf ,使用好用，总结宏的使用(A windbreak bar set udf ,use it well and summarize the use of macros)