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bpdetail
严格按照BP网络计算公式来设计的一个matlab程序,对BP网络进行了优化设计
优化1:设计了yyy,即在o(k)计算公式时,当网络进入平坦区时(<0.0001)学习率加大,出来后学习率又还原
优化2:v(i,j)=v(i,j)+deltv(i,j)+a*dv(i,j) (BP network in strict accordance with the formula to design a matlab program, the optimized BP network design optimization 1: Design of the yyy, that is, o (k) formula, when the network into the flat areas (< 0.0001) increase learning rate large, after the optimization of learning rate reduction 2: v (i, j) = v (i, j)+ deltv (i, j)+ a* dv (i, j) )
- 2009-04-24 13:12:18下载
- 积分:1
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ISODATA
说明: 模式识别中的ISODATA算法,以及利用模式相似性测度分类的源程序(The ISODATA algorithm for pattern recognition and classification using pattern similarity measure of the source)
- 2011-03-17 21:33:47下载
- 积分:1
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cp0802_IEEEuwb
本代码为IEEE S_V信道的仿真文件!通过修改相应的参数 还可成为其他三种SV信道(This archive is based on ultra-wideband radio all the simulation code book! Editor Ge Lijia)
- 2011-05-08 10:07:16下载
- 积分:1
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VCMatlab
VC++与Matlab混合编程实现图像处理(VC and Matlab Image Processing Mixed Programming)
- 2009-10-10 12:43:09下载
- 积分:1
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underwateracoustic
水声信道,水声模型 很不错的东西,经典中的经典,希望对大家有帮助-Acoustic model is a good thing, the classic of classics, and they hope to have everyone help(underwater acoustic,Acoustic model is a good thing, the classic of classics, and they hope to have everyone help)
- 2020-07-04 07:00:01下载
- 积分:1
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fft
matlab实现excel格式的数据的快速傅立叶变化程序(matlab excel format data fast Fourier transform program)
- 2012-10-11 16:41:51下载
- 积分:1
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xiaoboshangchengxu
使用与matlab中的小波熵程序,易于实现,注释清晰容易理解(With the the wavelet entropy program in matlab, easy to implement easy to understand, clear notes)
- 2020-07-02 17:00:02下载
- 积分:1
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FIR
1、验证窗函数 N 变化时,验证其频谱主瓣副瓣比、主瓣宽度的变化。
a)矩形窗函数的 N 变化时,验证其其频谱主瓣副瓣幅度比基本不会发生变化,
而主瓣宽度将会变窄。这说明,当用矩形窗函数设计滤波器时,增大 N 不能使
得阻带衰减减小,但能够减小过渡带。
b)再选取其他的窗如 hamming/hanning 窗,验证当 N 变化时,其频谱主瓣宽
度变化、主瓣副瓣比值变化情况。
2、用窗函数法设计线性相位 FIR 低通,通带截止频率 wp=0.5PI, 阻带截止频率 ws=0.6PI,
阻带衰减不小于 40dB,通带衰减不大于 3dB.
a)选取 Hanning,Hamming 窗查看设计出来的 FIR 的过渡带宽和阻带衰减是否
满足要求,二者有什么不同。
b)使用 hamming 窗,将窗长增大 1 倍,设计 FIR。验证同样的窗函数类型
(hamming),不同窗长度时,设计出来的 FIR 的过渡带宽和阻带衰减都有什么变
化。
3、不使用 Matlab 系统函数得到上一项指标的低通,并与上一项结果比较。
4 用窗函数法设计线性相位 FIR 高通,通带截止频率 wp=0.8PI, 阻带截止频率
ws=0.7PI, 阻带衰减不小于 30dB,通带衰减不大于 3dB.(An actual filter is implemented using the truncated unit impulse response sequence of the ideal filter.
For the ideal low pass filter, the unit impulse response h, N, D () is intercepted by a length of N, and the length is
The N sequence H (n), when intercepted, guarantees causality and linear phase requirements for the filter.
In order to reduce the Gibbs effect, the H (n) window is added, and the appropriate window function is selected to ensure the stopband attenuation and
Transition zone requirement. Note that the sidelobe of the window function affects the stopband attenuation of the filter, and the main lobe width affects the filter
Transition bandwidth.)
- 2017-07-06 11:55:24下载
- 积分:1
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WCDMA_Model
WCDMA model in symulink model in matlab
- 2009-04-28 15:07:02下载
- 积分:1
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LS-SVR
最小二乘支持向量回归算法:
训练数据用来得到回归模型,测试数据用来判断是否为显著武昌(Least squares support vector regression algorithm:
Training data to train the model, the test data for testing, to judge whether the data for gross error data)
- 2021-02-19 16:19:44下载
- 积分:1