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finitedif
石油行业软件,有限差分法在地震资料处理中的应用程序源码(The oil industry software, finite difference method in seismic data processing application source code)
- 2007-10-29 18:28:53下载
- 积分:1
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wimax_ofdm_ber_snr
ofdm simulation, cantains ber, snr. it s short code ofdm mimo, wimax wide.
- 2010-01-02 22:38:22下载
- 积分:1
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sinorder
为sinudoidal模型的AIC阶估计.AIC信息准则即Akaike information criterion,是衡量统计模型拟合优良性的一种标准,又由于它为日本统计学家赤池弘次创立和发展的,因此又称赤池信息量准则。它建立在熵的概念基础上,可以权衡所估计模型的复杂度和此模型拟合数据的优良性。
在一般的情况下,AIC可以表示为: AIC=2k-2ln(L)
其中:k是参数的数量,L是似然函数。 假设条件是模型的误差服从独立正态分布。 让n为观察数,RSS为剩余平方和,那么AIC变为: AIC=2k+nln(RSS/n)
增加自由参数的数目提高了拟合的优良性,AIC鼓励数据拟合的优良性但是尽量避免出现过度拟合(Overfitting)的情况。所以优先考虑的模型应是AIC值最小的那一个。赤池信息准则的方法是寻找可以最好地解释数据但包含最少自由参数的模型。(AIC order estimation for sinudoidal model)
- 2013-12-05 13:18:54下载
- 积分:1
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四步相移法程序
说明: 实现光栅投影,并将光栅投影到物体上,然后解相位(Realize the grating projection, project the grating onto the object, and then solve the phase)
- 2020-12-08 19:39:20下载
- 积分:1
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condmutualinfo
计算时间序列的熵信号,用以获取信号统计分析(Calculate the entropy of the signal time series, statistical analysis to obtain the signal)
- 2010-09-25 21:51:36下载
- 积分:1
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MUSIC
MUSIC算法是一种基于矩阵特征空间分解的方法。从几何角度讲,信号处理的观测空间可以分解为信号子空间和噪声子空间,显然这两个空间是正交的。信号子空间由阵列接收到的数据协方差矩阵中与信号对应的特征向量组成,噪声子空间则由协方差矩阵中所有最小特征值(噪声方差)对应的特征向量组成。MUSIC算法就是利用这两个互补空间之间的正交特性来估计空间信号的方位。噪声子空间的所有向量被用来构造谱,所有空间方位谱中的峰值位置对应信号的来波方位。MUSIC算法大大提高了测向分辨率,同时适应于任意形状的天线阵列,但是原型MUSIC算法要求来波信号是不相干的。(MUSIC algorithm is a matrix decomposition method based on feature space. From the geometric point of view, the observed spatial signal processing can be decomposed into signal subspace and noise subspace, it is clear that the two spaces are orthogonal. The signal received by the array to the subspace of the covariance matrix of the signal component corresponding eigenvectors, the noise subspace of the covariance matrix of all by the smallest eigenvalue (noise variance) eigenvectors corresponding to the composition. MUSIC algorithm is the use of orthogonal properties between these two complementary space to estimate the spatial orientation of the signal. Noise subspace of all vectors are used to construct the spectrum, all the spatial orientation of the spectrum corresponding to the peak position of the signal wave direction. MUSIC algorithm greatly improves the resolution measurements, while the antenna array adapted to any shape, but the prototype MUSIC algorithm requires to wave sign)
- 2014-02-19 13:23:48下载
- 积分:1
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SVM
支持向量机方法是建立在统计学习理论的VC 维理论和结构风险最小原理基础上的,根据有限的样本信息在模型的复杂性(即对特定训练样本的学习精度,Accuracy)和学习能力(即无错误地识别任意样本的能力)之间寻求最佳折衷,以期获得最好的推广能力[14](或称泛化能力)。 (SVM is based on statistical learning theory and the theory of VC dimension based on structural risk minimization principle, according to the limited sample of information in the model complexity (ie, training samples of a specific learning accuracy, Accuracy) and learning ability (ie, error-free samples to identify any capacity) to find the best compromise between, in order to obtain the best generalization ability [14] (or generalization).)
- 2010-10-25 17:19:32下载
- 积分:1
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111232142343243
例3.3 以年龄为论域,取 。Zadeh给出了“年轻”的模糊集Y,其隶属函数为
(Example 3.3 domain of age, to take. Zadeh gives the " young" fuzzy sets Y, its membership function)
- 2015-03-18 17:35:29下载
- 积分:1
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59564322Simulink2
SIMULINK仿真实现BPSK在莱斯衰落+AWGN信道中的调制与解调,并分析了误码率和星座图等等参数。(SIMULINK simulation of BPSK in Rician Fading realize+ AWGN channel modulation and demodulation, and analyzes the bit error rate and constellation parameters and so on.)
- 2009-05-05 18:17:44下载
- 积分:1
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AF_Simulation
说明: 此程序的功能:在协作通信中,主要有AF,DF和CC三种传输方式,此程序完成对AF传输过程的MATLAB仿真。(This program implements AF simulation using Matlab.)
- 2011-02-24 11:11:18下载
- 积分:1