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本程序是基于bp神经网络的分类程序 开发环境是matlab(matlab)

关于端点检测的几种方法，语音样本是自己录制的，对传统算法做了一些改进，加入了去噪，去噪之后再进行端点检测，均调通 vad0303：自己设置调整门限为一定值 vad0310：根据能量值和过零率设置门限，自适应门限值 vad0310_2：基于比例因子的门限自调整 vad0310.m加入了噪声，端点检测前都噪声进行了处理 entropy.m：基于自适应子带频谱熵的稳健性语音端点检测 可用于语音增强及端点检测 dbdoor.m：双门限算法，用于语音端点检测。可以通过调整门限值，并加入门限自适应算法，实现语音端点检测(Several methods on endpoint detection, recording their own voice samples, the traditional algorithm has made some improvements, adding a de-noising, and then after de-noising endpoint detection are transferred through)

使用平面波展开法(PWE)计算声子晶体能带结构(Using the plane wave expansion method (PWE) to calculate the phonon band structure of crystals)

俄罗斯方块的matlab程序，可以自己在m环境运行(Tetris matlab program that can run their own environment in the m)

说明：  复合材料属性矩阵A，B,D,As的确定，通过这些矩阵可以计算材料刚度矩阵(form material matrix of composite material)

这是matlab中实现PID经典控制算法程序(This is the classic PID control algorithm program in matlab)

LDPC编译码的matlab仿真。内涵源程序以及文章说明，希望对大家有所帮助(LDPC codec matlab simulation. Source and content of the article shows, we want to help)

Speech reconirtrion very useful for studying and teaching

windows 获取网卡的描述信息 windows 获取网卡的描述信息(Windows for the description of the card information Windows for the description of the card information)

频谱感知中的能量感知算法，在不同虚警概率的情况下，信噪比和检测概率的变化。(In Cognitive Radio， spectru sensing is important。And energy detection is more. In different false alarm probability, the Pd vary with the SNR.)