negentropy_grad

说明：  这是一个关于小波阈值图像去噪的程序，通过对分解后的系数各层进行不同的阈值处理，最后得到去噪后图像。(It s about a wavelet threshold program well worth beginners reference! )

利用matlab语言实现的DES算法，其特点是加入了UDP发送与接收模块，可以实现加密数据后的网络发送与接受后的解密(The use of DES algorithm matlab language, which is characterized by adding UDP send and receive modules can realize the network send and receive encrypted data after decryption post)

波达方向（Direction Of Arrival）估计，又称为谱估计（spectral estimation）、波达角（Angle Of Arrival）估计。一个信源有很多可能的传播路径和到达角。如果几个发射机同时工作，每个信源在接收机处形成潜在的多径分量。因此，接收天线能估计出这些到达角就显得很重要，目的是破译出哪个发射机在工作以及发射机所处的可能位置。通过测量辐射信号的波达方向（DOA全称Direction Of Arrival）或波达角（AOA）来估测辐射源的位置。理论上这种估计只需要两个接收阵元就可以确定辐射源的位置，但在实际中，由于受到角度分辨率、多径和噪声限制，所需阵元通常要多于两个。DOA定位技术原理是利用接收机处的阵列天线和波达方向（DOA）估计技术来确定一个从接收机到信源的波达方向线，即为方向线（LOB），最后利用多个接收机估计的DOA进行三角测量，方向线的交点就是信源的估计位置。(DOA (Direction Of Arrival) estimation , also known as spectral estimation (spectral estimation), angle of arrival (Angle Of Arrival) estimation. There are many possible sources a propagation path and the angle of arrival . If several transmitters simultaneously, a potential source for each multipath component at the receiver. Therefore, the receiving antenna can estimate the angle of arrival becomes very important, which aims to decipher the location of the transmitter at work as well as possible in which the transmitter . By measuring the radiation signal DOA (DOA stands for Direction Of Arrival) or the angle of arrival (AOA) to estimate the location of the radiation source . Theoretically this estimate requires only two receiving array element can determine the position of the radiation source , but in practice , due to the angular resolution , multipath and noise limits , usually required more than two array elements . DOA positioning technology is the use of an array of antennas at)

说明：  构建三层次的BP神经网络，通过多项指标预测含水层涌水能力，(Prediction of aquifer water inflow capacity based on BP neural network)

用matlab的simulink环境下搭建的光伏发电仿真模型，内含三个simulink文件，解压后直接运行(PV simulation model used to build the next matlab simulink environment, containing three simulink file, run directly after decompression)

this is ADM codes for the Compressive sensing

说明：  mexcn工具包(2010bmatlab)(mexcn tool box(2010bmatlab))

滑模变结构仿真，malab源程序。滑模变结构控制算法简单、鲁棒性好和可靠性高，故被广泛应用于运动控制中，尤其被用于可建立精确数学模型的确定性控制系统中(SMVSC simulation, malab source. Sliding mode variable structure control algorithm is simple, good robustness and high reliability, it is widely used in motion control, especially be used to establish a precise mathematical model can be deterministic control system)

《高等光学仿真》第一版的第三章源程序，主要是关于单模光纤和多模光纤的特征方程(" Advanced optical simulation," the third chapter of the first edition of the source, mainly on single-mode fiber and multimode fiber characteristic equation)

说明：  logsitic模型的极大似然估计算法，最小二乘估计算法(logsitic model maximum likelihood estimation, least squares estimation algorithm)