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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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c
说明： 问题的提出：根据“心”形曲线的数学参数方程，绘制曲线并输出屏幕。在各坐标点处循环显示“LOVE”的各字母。
编程思路：“心”形曲线的数学参数方程为:
(Of the problem: According to the " heart" -shaped mathematical curve parameter equation, drawing curves and output screen. Coordinates of points in the cycle show " LOVE" in the letter. Programming idea: " heart" -shaped mathematical curve parameter equation:)
- 2010-06-02 02:28:36下载
- 积分：1
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9
说明： 基于配电网pscad仿真 ，电压等级为10.4kV(Pscad distribution network based simulation, the voltage rating of 10.4kV)
- 2014-05-17 14:20:29下载
- 积分：1
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500KVGrounded-to-short-circuit.zip
基于PSCAD的关于500kV对地短路仿真与建模(500kVGrounded to short-circuit)
- 2021-04-10 16:38:59下载
- 积分：1
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getcolor
说明： java颜色获取和调色源码，功能不是特别强，但是简单实用(java color palette to access and source, function is not particularly strong, but simple and practical)
- 2008-10-01 06:23:26下载
- 积分：1
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drawMFC
一个简单的程序，可以绘制点、线、圆、方。可以保存成一定格式的图片文件。软件最大的问题是绘图基本在对应的鼠标事件里进行，而没有在paint方法里进行，可借鉴。(A simple program, you can draw points, lines, circles, square. Can be saved into a certain format image files. The biggest problem is the graphics software basic mouse events in the corresponding conduct, but not in the paint method in the conduct, we may learn.)
- 2013-09-13 09:27:12下载
- 积分：1
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Afuzhuangcadsp
服装CAD源代码，可以进行bspline的打断分割割，裁减操作，而且还可以解析shx字库，进行标注等。
(Garment CAD source code can be bspline split the interrupted cut cut operation, but also can resolve shx font marked.)
- 2012-09-08 12:55:50下载
- 积分：1
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wenli
纹理谱直方图的制作与相关代码，附说明。matlab(Texture spectrum histogram produced with the relevant code, annotated. matlab)
- 2008-04-06 12:50:22下载
- 积分：1
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Yangtiao
自己编的可输入数据的，三次B样条曲线程序源码(nurbs spline)
- 2014-01-02 14:45:59下载
- 积分：1
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yixiang
PSCAD 自建移相变压器模型 实现正负7.5度移相(The PSCAD self phase-shifting transformer model plus or minus 7.5 degrees phase shift)
- 2012-12-12 08:58:39下载
- 积分：1
