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ding
选取windows系统自带的ding.wav信号作为分析对象,在Matlab软件平台下,利用函数wavread对音频信号进行采样,记住采样频率和采样点数,听一下原始声音sound(y, fs, bits)。
(2)音频信号的频谱分析,先画出音频信号的时域波形;然后对音频号进行快速傅里叶变换fft(y,N),N取32768,画出信号的频谱特性,加深对频谱特性的理解。
(3)根据频谱,反演时域特性,画出时域波形。寻找幅值最大的两个频率,此频率除以fft点数在乘以采样频率就是信号的主频,即可合成信号的时域图形,听一下声音。
(4)对原音频信号进行1024点的分段付立业分析meshgrid
(5)根据主要频线合成音频,并画出时域图形,试听合成效果。
(6)采用线性插值(linspace)和傅立业反变换(fliplr, ifft)分别合成音频,并画出时域图形,试听效果。
(err)
- 2009-01-13 16:23:47下载
- 积分:1
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0-1programming
0-1整数规划有很广泛的应用背景,比如指派问题,背包问题等等,实际上TSP问题也是一个0-1问题,当然这些问题都是NP问题,对于规模较大的问题用穷举法是没有办法在可接受的时间内求得最优解的,本程序只不过是一个练习,得意之处是用递归法把所有解都排列出来。另:胡运权所著的《运筹学基础及应用(第三版)》第97页的例3,我用本程序求解得到的结果是:最优解是x*=(1,0, 0, 0, 0),最优值是f(x*)=8,但书求得最优解是x*=(1,0, 1, 0, 0),最优值是f(x*)=4,是不是书中写错了,请大家验证。以下是源程序,大家可以任意使用无版权问题,另外,如果大家有大规模的0-1规划的问题也希望提供给我,谢谢。变量个数至少是3个(0-1 Integer Programming is a very broad background, such as assignment, bags and so on. actually TSP is a 0-1, of course, these problems are NP, for larger problem with the law is not exhaustive approach in an acceptable time frame to obtain the optimal solution. this procedure is only one practice, farewell tour is the method used recursive all of the solutions to show. Another : Hu Yun-author of "operational research, and application base (third edition)" Article 97 of the three cases, I use this procedure to solve the result is : is the optimal solution x = (1,0, 0, 0, 0), the optimal values of f (x*) = 8, but the book is to find the optimum solution x = (1,0, 1, 0, 0), the optimal values of f (x*) = 4, the book is not a mistake, please certification. Following is the source)
- 2006-07-01 10:33:18下载
- 积分:1
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a002
光子晶体点缺陷程序,特别是做光子晶体缺陷的同行,可以借鉴一下。(Photonic crystal point defect procedures, especially peers to do the photonic crystal defects, can learn.)
- 2012-04-19 13:15:13下载
- 积分:1
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kstest-testing
如何检测数据是否服从正态分布,kstest检测。(How to detect whether the data follow a normal distribution, kstest testing.)
- 2014-09-29 14:22:16下载
- 积分:1
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digital-communications-fundamentals-and-applicati
This is one of the best books i have ever used in digital communication. It is really helpful.
- 2015-01-13 17:45:45下载
- 积分:1
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MATLAB2019官方入门
说明: MATLAB2019官方入门文档,详细介绍了MATLAB2019的使用方法与技巧(The official entry document of matlab2019 introduces the use methods and skills of matlab2019 in detail.)
- 2020-03-13 22:33:25下载
- 积分:1
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nihe
拟合 matlab!拟合 matlab!拟合 matlab!拟合 matlab!(matlab nihequxian.matlab nihequxian.matlab nihequxian.)
- 2010-06-03 15:27:25下载
- 积分:1
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LBM_poiseuille_matlab
LBM法求解流体力学中的泊肃叶流问题,输入迭代次数,输出动态速度分布图。(LBM method in fluid mechanics Poiseuille flow problem, enter the number of iterations, output dynamic velocity distribution.)
- 2011-06-10 10:41:51下载
- 积分:1
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experiment1
噪声中正弦信号的现代法谱分析,采用了直接法、间接法、Bartlett法和Welch法,分别分析了不同窗长度、不同窗函数和不同信噪比对谱估计的影响。(Modern normal spectrum analysis of sinusoidal signal in noise adopts direct method, indirect method, Bartlett method and Welch method. The effects of different window lengths, different window functions and different signal-to-noise ratios on spectrum estimation are analyzed respectively.)
- 2019-03-06 15:41:52下载
- 积分:1
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Disaggregation
解集模型,将一年的径流分解为月径流 程序中含有解释说明(Disaggregate yearly streamflow to monthly streamflow)
- 2010-08-09 01:56:39下载
- 积分:1