lorenzhundun

consider the power and spectrum

深刻蚀光栅的色散方程，可以得到有效折射率，(Deep etching the grating dispersion equation can be effective refractive index)

基于matlab环境，利用舍选法，逆函数法生成随机数(Based on matlab environment, using rejection method, the inverse function method for generating random numbers)

Matlab, picture, example of impsnr function

Continuous efforts have been made to process degraded iris images for enhancement of the iris recognition performance in unconstrained situations. Recently, many researchers have focused on developing the iris segmentation techniques, which can deal with iris images in a non-cooperative environment where the probability of acquiring unideal iris images is very high due to gaze deviation, noise, blurring, and occlusion by eyelashes, eyelids, glasses,

一个完整的1.5MW双馈风力发电机组的matlab仿真模型可以进行低电压穿越仿真。(A complete 1.5MW double-fed wind turbine matlab simulation model can be low voltage through simulation.)

关于数字通信中DFT和FFT的仿真程序，真正有用(On DFT and FFT digital communication simulation program, really useful)

说明：  一种未知信源数的高分辨DOA 估计算法：众多性能优良的超分辨波达方向(DOA)估计算法通常需要预先判定信源数目，然而，现有的信源数估计 算法在有限采样快拍条件下，估计性能随着信噪比的降低而下降，错误概率也相应增加，最终导致DOA 估计失败。 该文提出一种超分辨的DOA 估计算法，此算法不需要预判信源个数和进行特征值分解，同时在时变环境中，针对 快拍数较少的情况下，依然保持较高的角度分辨能力，可以被认为是综合了Capon 法和MUSIC 法的优点。(Algorithm on High Resolution DOA Estimation without Sources Number：Many of the super resolution DOA(Direction-Of-Arrival) estimation algorithms presume the number of signal sources. Since the sample snapshot is limited, however, the available algorithms on source number estimation may fail at lower SNR. In this paper, a novel algorithm for high resolution DOA estimation is proposed, which not only skips sources number estimation and EVD, but also behaves satisfactorily with a few snapshot, it may be viewed as a combination of merit of conventional Capon and MUSIC method.)

采用熵值法求特征分量的权重，一般可用于特征选择与特征提取(Entroy algorithm ia used to be calculate the weight of each element,and is helpful in the selection and extraction of features)

本程序是一个数据预处理的程序，首先通过KL变换将数据进行一次降维，然后通过LDA对数据进一步降维(This program is a data preprocessing procedure, first by a KL transform data dimensionality reduction, then the data further by LDA dimensionality reduction)