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juleipingjia
为判断聚类结果质量的好坏，需要一个客观的评价指标来评价聚类结果的合理性。聚类性能评价方法通常分为三种：外部评价法，内部评价法，相对评价法。外部评价法将聚类结果得到类标签和已知类标签进行比较，此评价法的前提是数据集样本的类标签已知(In order to judge the quality of clustering results, good or bad, the need for an objective evaluation to assess the reasonableness of the clustering results. Clustering performance evaluation method is usually divided into three types: external evaluation method, internal evaluation method, relative evaluation method. External evaluation method of clustering results to obtain class labels and the known class labels are compared, the premise of this evaluation method is a class label known sample of the data set)
- 2021-04-10 00:38:59下载
- 积分：1
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OFDM
正交频分复用（OFDM）的调制与解调以及OFDM的误码率。(Orthogonal Frequency Division Multiplexing (OFDM) modulation and OFDM demodulation and bit error rate.)
- 2010-05-12 14:48:48下载
- 积分：1
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denoisingWavelet
Wavelet denoising
For using this code need to use signal toolbox and general toolbox in your matlab
In the first part of this assignment, we asked to obtain a (black-and-white) digital image of size
512 by 512 and then generate noisy image by adding a Gaussian noise but under the condition of
having SNR=20dB by select the suitable value of variance for Gaussian noise formula.
Second step is performing wavelet denoising using the hard thresholding (Use the db 6 for four
levels) in the condition of finding the optimal thresholding value of T in terms of the SNR obtained. It
means that, we should find the highest SNR value by finding the suitable value for threshold. Then we
asked to do the same process but this time using soft thresholding.
Finally for the last part of question one, we should compare the results of the obtained SNR
with the recommendations of 3*sigma for the hard thresholding and 3/2*sigma for the soft
thresholding.
- 2013-12-11 17:34:39下载
- 积分：1
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人口预测
说明： 时间序列的人口预测，采用三次指数平滑，还有灰色预测，有数据提供参考。(The population forecast of time series adopts three exponential smoothing and grey forecast, which provides reference for data.)
- 2020-11-10 16:59:46下载
- 积分：1
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31642-
MATLAB建模与仿真应用资源，内含丰富源码(MATLAB modeling and simulation application resources)
- 2012-07-31 00:54:02下载
- 积分：1
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chap4
.已知某炉温控制系统，要求温度保持在600℃恒定，针对该控制系统有以下控制经验：
（1）若炉温低于600℃，则升压，低的越多升压越高；
（2）若炉温高于600℃，则降压，高得越多降压越低；
（3）若炉温等于600℃，则保持电压不变。
设模糊控制器为一维控制器，输入语言变量为误差，输出为控制电压。输入输出变量的量化等级为7级，取5个模糊集，试设计隶属度函数误差变化划分表，控制电压变化划分表和模糊控制规则表。
(Known for a temperature control system that requires a constant temperature is maintained at 600 ℃, the following control experience for the control system:
(1) If the furnace temperature is below 600 ℃, the step-up, the more the higher the lower the boost
(2) if the furnace temperature is higher than 600 ℃, the blood pressure, high blood pressure, the lower the more
(3) If the furnace temperature is equal to 600 ℃, then keep the voltage constant.
Set of fuzzy controller for one-dimensional controller, input linguistic variables for error, the output control voltage. Input and output variables of quantization levels for seven, take five fuzzy sets, membership function test design error variance divided table, partition table and the control voltage variation fuzzy control rule table.)
- 2015-04-10 21:53:18下载
- 积分：1
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复件shupidwcandcontrolpid
说明： 单神经元PID控制的例子,用于伺服电机的调速(single neuron example PID control for the servo motor speed control)
- 2006-02-21 13:42:26下载
- 积分：1
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TRETE
完美非均匀质量载荷压电薄膜，这是一个MATLAB程序，可以运行。(Perfect non-uniform mass loading piezoelectric film, which is a MATLAB program that can run.)
- 2013-12-02 09:48:46下载
- 积分：1
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reconosimiento-de-voz
Get reduce the size of an original sound file between half to three quarters of the initial size. The FLAC format is often used to sell music online, and as an alternative to MP3 to share when you want to reduce the file size would have
- 2013-11-12 02:35:06下载
- 积分：1
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1Dphotoniccrtstaltoushelv
利用matlab计算一位光子晶体的透射率(Using matlab calculate one-dimensional photonic crystal transmittance)
- 2009-09-28 09:42:23下载
- 积分：1
