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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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Airfoil
实现B样条曲线画机翼，可输入自选参数得到不同展弦比，后掠角，上反角的机翼(B-spline curve to achieve painting wing, enter the optional parameters of different aspect ratio,后掠角, on the wing angle)
- 2009-06-15 09:31:35下载
- 积分：1
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fengji-pscad
用PSCAD对文献中的永磁直驱风机模型进行了仿真，并且能够可靠运行。(PSCAD for literature with permanent magnet direct drive wind turbine models for simulation, and reliable operation.)
- 2021-03-18 15:39:20下载
- 积分：1
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测试版本
建筑铝合金模板楼面布板，基于cad平台二次开发，使用lisp语言。(Building Aluminum Alloy floor layout template)
- 2017-12-11 17:37:46下载
- 积分：1
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MyDraw
使用C#实现的一个绘图程序，在绘图结束后双击鼠标会得到一条跟踪的直线(Using C# implementation of a drawing program, double-click in the drawing after the end of the line will get a tracking)
- 2013-05-31 16:43:38下载
- 积分：1
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光强及相位
MATLAB仿真模拟了LG光束的光强及相位的3维图与2维图(MATLAB simulation of LG beam intensity and phase of the 3-dimensional diagram and 2-dimensional diagram)
- 2021-04-09 12:49:00下载
- 积分：1
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读取dxf
说明： 实现对单图层dxf文件的信息采集，例如直线的起止点、圆弧的圆心与半径等(Achieving Information Collection of DXF Files with single layer)
- 2019-06-29 10:47:57下载
- 积分：1
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Draw
c++图形的绘制(曲线图.饼状图.柱状图) 以及 图形的打印 与打印预览(c++ graphics rendering (curves. caky Fig. histogram), and graphics printing and print preview)
- 2008-07-21 10:49:43下载
- 积分：1
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UseBrush
教你如何使用画刷，MFC里面的画刷，文件里面是相关的代码。(tell you how to use the brush of MFC,there s the relative code inside the file.)
- 2010-05-09 21:30:59下载
- 积分：1
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10kV_SVG
PSCAD做的12模块H桥SVG模型，电流矢量控制，运行良好。(PSCAD do SVG module 12 H bridge model, the current vector control, work well.)
- 2017-01-01 18:07:49下载
- 积分：1
