MK

the code is written to watermark the video

用MATLAB语言根据成形滤波器法实现通信环境中的瑞利信道的仿真(using MATLAB under the shaping filter method is the communications environment Rayleigh Channel Simulation)

16QAM调制和16psk调制的眼图程序(Modulation and 16QAM modulation eye procedures 16psk)

实现火箭的垂直发射，并在重力作用下实现转弯。(Achieve vertical launch rocket and turn under the influence of gravity.)

设计一个数字滤波器，在频率低于 的范围内，低通幅度特性为常数，并且不低于0.75dB。在频率 和 之间，阻带衰减至少为20dB。 (1)试求满足这些条件的最低阶Butterworth滤波器。(Design a digital filter, in the range of frequencies below the low-pass amplitude characteristic is constant, and not less than 0.75dB. Between the frequency and stop-band attenuation of at least 20dB. (1) Determine the lowest-order Butterworth filter to meet these conditions.)

说明：  国外课件：Active shape model 和 active contour model(snake)的matlab 原码，包括PDF格式的程序使用说明(Foreign courseware: Active shape model and active contour model (snake) in the matlab source, including the PDF format of the program instructions)

matlab例程，实现将图像样本转换成libsvm数据格式，并写入txt文件（附有测试和训练数据）(matlab routine to achieve the image samples into libsvm data format, and write txt file (with the test and training data))

说明：  m序列发生器及其自相关 m序列构成的信号(矩形脉冲） m序列sinc成形信号的自相关(m-sequence generator and its associated m-sequences formed from the signal (rectangular pulse) m sinc sequence forming signal autocorrelation)

以实际所测随机中子脉冲数据的自相关函数为研究对象，借助仿真实验，开展Elman神经网络对不同浓度核材料进行识别的研究。在实测数据的基础上，通过叠加随机噪声，模拟产生了不同浓度核材料的相关函数样本用于神经网络的训练与测试，实验结果表明，(Calculating the stochastic neutron pulse autocorrelation function with the actually measured data as the research object, we carry out different simulate experiments in concentration identification of varied nuclear materials using Elman neural network. Superimposing random noise on the measured data, we get correlation function samples simulating the different concentrations of nuclear material for training and testing the neural network.)

两个轨道计算的子程序，四元素乘积计算法和空间轨道动力学方程递推的扩展卡尔曼滤波算法。(Calculation subroutine two tracks, the four elements of the product of calculation and orbital dynamics space equation recursive extended Kalman filter algorithm.)