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How to do hanning window

该文研究了河南省不同年龄组的历史发展趋势和65岁以上人口未来发展趋势以及影响老龄化相关因素的问题。通过对不同时期的人口数据的分析和预测，从一个经典的模型入手，建立了三个不同的模型，分别 模型、 模型和关联分析模型，然后采用统计分析的方法来解决这些问题，预测出了河南省未来老龄化人口的发展。(This paper studies the different age groups in Henan Province of historical development trends and population over the age of 65, as well as the impact of future development trend of aging-related factors. Different stages of the analysis of population data and projections from a model of the classic, the establishment of three different models, namely, model, models and associated analysis model, and then using statistical analysis methods to solve these problems, predict the Henan Province, the future development of an aging population.)

超声波系统下的FFT仿真程序,可以将主要频率的波长滤波出来(FFT simulation program of ultrasonic system, can filter out the main frequency wavelength )

常微分方程的数值解法 包括RUNGE-KUTTA方法 Adams预估——校正算法 和MATLAB自带的ODE45解法(Numerical solution of ordinary differential equations including the method of Adams RUNGE-KUTTA predictor- corrector algorithm and ODE45)

QAM-OFDM调制解调,描述了原始信号经过QAM调制后又进行OFDM调制，最后经过高斯信道，解调的过程(QAM-OFDM modulation and demodulation)

计算海域潮汐的同潮图，字数字数字数字数字数字数(Calculate tide cotidal map)

1、 MATLAB的启动和退出； 2、 学习了解MATLAB的菜单栏、工具栏、命令窗口、工作台、工具箱窗口、工作空间窗口、“历史命令”窗口、当前工作路径下的目录窗口和Start菜单； 3、熟悉MATLAB的命令窗口； 4、熟悉系统演示和在线帮助。 (1, the start of MATLAB and exit; 2, the study and understanding of MATLAB menu bar, toolbars, order window, workstations, toolbox window, the window work space, "historical order" window. work under the current path to the directory window and Start menu; 3, MATLAB familiar with the order window; 4. familiar with the demonstration and online help.)

用平面波展开法计算二维声子晶体带隙,可以提取一幅图中想要的目标，能量谱分析计算。( Computation Method D phononic bandgap plane wave, Target can be extracted in a picture you want, Energy spectrum analysis and calculation.)

说明：  在MATLAB平台上通过实验进一步了解离散小波变换，加深对小波变换的理解(Digital watermarking based on Wavelet Transform)

read procpar file in NMR system