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FrequencyDomainAnalysisOfTheSystem
信号频谱分析
1. 观测已知方波信号、正弦波信号的频谱
分析频率为4KHz、8KHz的占空比为50 的方波信号、正弦波信号的频谱。记录所得频谱图。
观测实时模拟信号（语音）的频谱
用音频设备采集一段语音，将语音存为.wav格式。对wav文件作分段傅里叶变换分析。语音是分音节的，应把它分段分析，而且实际运用中的数字信号处理的FFT的点数是有限的，一般只能达到千点。用傅里叶反变换IFFT，从频域恢复信号。画出频谱图和语音波形图(Signal spectrum analysis 1. Observing a known square-wave signal, sine wave signal frequency spectrum analysis 4KHz, 8KHz for the 50 duty cycle square wave signal, sine wave signal frequency spectrum. The recorded frequency spectrum. Observing real-time analog signal (voice) of the spectrum collected with the audio devices section of voice, voice saved as. Wav format. Wav file of the sub-Fourier transform analysis to make. Speech is divided into syllables, it should be sub-analysis, and practical application of digital signal processing of the FFT points is limited, generally only reach 1000 points. Fourier inverse transform IFFT, to restore the signal from the frequency domain. Draw maps and voice waveform spectrum)
- 2010-01-27 16:23:22下载
- 积分：1
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migong
一个完整的图形编程源程序，可供图形编程者学习(A complete graphical programming source code available for graphics programmers to learn)
- 2009-12-02 18:16:56下载
- 积分：1
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Chap03
《AutoCAD VBA & VB.NET开发基础与实例教程》（C#版)代码-Chap03(" AutoCAD VBA & VB.NET development infrastructure and tutorial examples" (C# version) Code-Chap03)
- 2015-09-21 15:35:57下载
- 积分：1
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34123412313
2个基于pscad的微型燃气轮机模型，适合模型仿真的人使用(2 pscad microturbine-based model for people to use simulation models)
- 2020-10-15 16:57:30下载
- 积分：1
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fangwindowshuatuchengxu
一个仿windows画图程序AppWizard has created this photo application for you. This application
not only demonstrates the basics of using the Microsoft Foundation classes
but is also a starting point for writing your application.
This file contains a summary of what you will find in each of the files that
make up your photo application.
(An imitation of windows drawing program AppWizard has created this photo application for you. This application not only demonstrates the basics of using the Microsoft Foundation classes but is also a starting point for writing your application. This file contains a summary of what you will find in each of the files that make up your photo application.)
- 2010-12-24 22:08:29下载
- 积分：1
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mutualDCDC
基于PSCAD/EMTDC搭建的双向dcdc，可做参考(Bidirectional dcdc based on PSCAD/EMTDC，provide you a strategy to build DCDC)
- 2016-01-21 11:11:26下载
- 积分：1
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MFC_draw
说明： 用VC++编写，MFC文档框架，是一个简易的画图小程序，在文档界面上画图(With VC++ Prepared, MFC framework document is a simple drawing of small procedures, the document interface drawing)
- 2008-09-26 15:11:27下载
- 积分：1
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GMTrumen
GMT是一个很强大的地学绘图软件，应用于很多专业，很实用，这是一篇很好的GMT入门教程(GMT is a very powerful geoscience mapping software, used in many professional and very practical, this is a good introductory tutorial GMT)
- 2013-11-18 14:27:10下载
- 积分：1
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ThreeBSpline_VC
说明： 三次B样条,程序中有部分说明,可以自由在其中进行扩展设计其它类似样条程序.(cubic B-spline, some procedures that can be carried out in one free expansion design similar kind of procedure.)
- 2006-05-09 10:13:42下载
- 积分：1
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brezenham
Bresenham algorithm (realization was created by russian student)
- 2013-05-29 23:50:09下载
- 积分：1
