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one
产生右图所示图像f1(m,n)，其中图像大小为256×256，中间亮条为128
×32，暗处=0，亮处=100。对其进行FFT：
① 同屏显示原图f1(m,n)和FFT(f1)的幅度谱图；
② 若令f2(m,n)=（-1）m+n f1(m,n)，重复以上过程，比较二者幅度
谱的异同，简述理由；
③ 若将f2(m,n)顺时针旋转90 度得到f3(m,n)，试显示FFT(f3)的幅
度谱，并与FFT(f2)的幅度谱进行比较；
④ 若将f1(m,n) 顺时针旋转90 度得到f4(m,n)，令f5(m,n)=f1(m,n)+f4(m,n)，试显
示FFT(f5)的幅度谱，并指出其与FFT(f1)和FFT(f4)的关系；
⑤ 若令f6(m,n)=f2(m,n)+f3(m,n)，试显示FFT(f6)的幅度谱，并指出其与FFT(f2)和
FFT(f3)的关系，比较FFT(f6)和FFT(f5)的幅度谱。(Generating an image f1 (m, n) shown in the figure, wherein the image size is 256 256, the intermediate light bar 128 32 0 = dark, bright Department 100. Its FFT: ① screen display picture f1 (m, n) and the FFT (f1) of the amplitude spectrum ② If so f2 (m, n) = (-1) m+n f1 (m, n), repeat The above process, comparing the amplitude spectrum of the similarities and differences between the two, brief reasons ③ If f2 (m, n) 90 degrees clockwise to get f3 (m, n), try to display FFT (f3) the amplitude spectrum and with the FFT (f2) comparing the amplitude spectrum ④ If f1 (m, n) obtained by 90 degrees clockwise f4 (m, n), so f5 (m, n) = f1 (m, n)+f4 (m, n ), try to display FFT (f5) amplitude spectrum, and pointed out its relationship with the FFT (f1) and FFT (f4) of ⑤ If so f6 (m, n) = f2 (m, n)+f3 (m, n) and try to display the FFT (f6) amplitude spectrum, and pointed out its relationship with the FFT (f2) and FFT (f3), comparing FFT (f6) and FFT (f5) amplitude spectrum.)
- 2013-11-26 16:24:18下载
- 积分：1
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LG-BPNN
基于遗传算法的神经网络例子，运行结果相当理想，每一步都是源代码，宝贵。(Examples of genetic algorithms based on neural networks, operating result is quite satisfactory, every step is the source code, valuable.)
- 2015-04-11 08:20:30下载
- 积分：1
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CREATION-OF-SYMBOL-TABLE
This program is for the implementation of Symbol table using C language in which we can create a symbol table and also insert, modify, search and display the elements in the symbol table.
- 2014-01-23 16:27:36下载
- 积分：1
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11912917rayleigh
两个重要文件：
1、Rayleigh_Doppler_singlePath.m
产生单径Rayleigh衰落，采用了6种方法并进行了比较，推荐使用第6种方法；
2、Rayleigh_Doppler_multiPath.m
根据多条径的延时和强度，产生频率选择性衰落；
在单径和多径两个程序中，均提供了其功率谱的输出代码； (Two important documents: 1, Rayleigh_Doppler_singlePath.m to generate a single path Rayleigh fading, using six kinds of ways and compared, 6 recommended methods 2, Rayleigh_Doppler_multiPath.m under a number of path delay and intensity, resulting in frequency selective fading in both single path and multi-path process, provide the output of its power spectrum code )
- 2010-08-28 09:26:49下载
- 积分：1
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Wiley.Cognitive.Networks.Sep.2007
这本书讲述了认知无线电的发展，以及认知无线电的重要性，是认知无线电的开山之作，里面的理论通俗易懂，容易理解，有很多仿真图形(This book describes the development of cognitive radio, as well as the importance of cognitive radio, cognitive radio for the mountains, which the theory easy to understand, easy to understand, a lot of graphic simulation)
- 2010-12-25 10:14:52下载
- 积分：1
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LDPC-2012-02-11
LDPC编码的C语言实现。包括校验矩阵，生产矩阵的生成，编码，译码等。(LDPC coding in C language. Including the parity matrix, matrix production generation, encoding, decoding and the like.)
- 2013-12-14 21:18:48下载
- 积分：1
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ADDC
上线（单通）的聚类算法，它接受在每一步的单个样品，更新聚类中心，并产生新的中心，根据需要。该算法是有效的，在它生成一个单传的数据集群中心。(ADDC algorithm)
- 2012-01-29 20:53:54下载
- 积分：1
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zemax-Matlab
ppt文件，讲述如何使用matlab调用zemax中数据的文档(ppt file explains how to use the data in matlab call zemax document)
- 2013-08-07 13:09:18下载
- 积分：1
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collision-avoidance-channel-access-scheme-(1)
collision avoidance channel
- 2014-12-18 00:15:06下载
- 积分：1
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DihotomiGoldenRatioFibonacci
Implemented methods are:
Bisection method
The method of the golden section
Fibonacci method
Development Environment Visual Studio 2010.
no comments
C / C ++ | Windows NT / 2000 / XP / Vista / 7
- 2016-12-09 00:53:22下载
- 积分：1
