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BiotModel
说明： 求基于Biot模型的饱含流体介质的速度和衰减。(Solve the equation of Biot high-frequency and low-frequency equation based on Biot's paper(1956a,b) and calculate the seismic velocity and attenuation of the fluid-saturated medium.)
- 2017-06-29 22:37:11下载
- 积分：1
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mfile
ForMATLAB_2011a教程，matlab教程源代码，MATLAB使用和数学知识的丰富层次(ForMATLAB_2011a tutorials, matlab tutorial source code, MATLAB mathematical knowledge to use and rich gradation)
- 2013-07-10 20:00:09下载
- 积分：1
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shot.c
shortest path algorithms
- 2014-09-05 05:42:27下载
- 积分：1
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iriswavepr
decomposition image
- 2009-04-23 05:21:29下载
- 积分：1
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ZCR
autocov computes the autocovariance between two column vectors X and Y with same length N using the Fast Fourier Transform algorithm from 0 to N-2.
The resulting autocovariance column vector acv is given by the formula:
acv(p,1) = 1/(N-p) * sum_{i=1}^{N}(X_{i} - X_bar) * (Y_{i+p} - Y_bar)
where X_bar and Y_bar are the mean estimates:
X_bar = 1/N * sum_{i=1}^{N} X_{i} Y_bar = 1/N * sum_{i=1}^{N} Y_{i}
It satisfies the following identities:
1. variance consistency: if acv = autocov(X,X), then acv(1,1) = var(X)
2. covariance consistence: if acv = autocov(X,Y), then acv(1,1) = cov(X,Y)
- 2013-05-26 22:12:50下载
- 积分：1
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Detection-of-short-duration-power-quality-disturba
优秀论文及配套源码。电压暂降是动态电能质量问题中最受关注的热点之一。大量新型电力电子设备的广泛使用对电网电能质量的要求越来越高，而且电压暂降在电网中又具有一定的传播性。因此，无论从电网还是用户都迫切需要对电压暂降进行研究和治理。对电压暂降的检测是解决电压暂降的前提条件，故本论文主要对电压暂降的检测方法进行研究。
本文分析了国内外短时电能质量扰动检测的研究现状，并着重讨论了短路故障、感应电动机启动和变压器激磁三种电压暂降扰动情况下电压暂降的特性；在此基础上选择了基于S变换的短时电能质量扰动检测方法，从S变换的结果S模矩阵及S复矩阵中提取出所需数据并以此来对各种扰动情况下的电压暂降的幅值、相位跳变、持续时间和谐波含量进行分析。仿真结果表明，该方法很好地实现了对电压暂降各特征量的检测。
(The voltage sag is one of most hot topics in dynamic electric energy problems. Masses of new power and electron facilities have been put into use widely, requiring a high quality of electric network and power, chiefly the voltage sag. Moreover, the voltage sag can spread in the electric network. So people have every reason to research and control the voltage sag. However, before developing the voltage sag, people have to detect it. On account of the above, this essay will chiefly focus on the detect methods of the voltage sags.
In this paper, the status of the short duration power quality disturbance based on the different method are researched firstly, and emphasizes the characteristic of the voltage sag under the situation of the three kinds of voltage sag disturbances like the short circuit fault, induction motor start-up and transformer excitation. On the basis of the above, the short duration power quality disturbance detection method based on S transform is chosen. The complex m)
- 2021-04-08 19:39:00下载
- 积分：1
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fangxiangtu
各种形式的方向图，波束形成中有常规波速形成，等等(Various forms of pattern, with a conventional beamforming beamforming, etc.)
- 2013-11-14 19:52:33下载
- 积分：1
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OFDM-communication-system
《MATLABSimulink通信系统建模与仿真实例精讲》OFDM通信系统(" MATLABSimulink communications system modeling and simulation examples succinctly" OFDM communication system)
- 2013-10-24 15:09:41下载
- 积分：1
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111111111111
利用matlab实现数据模糊查询的功能，实现了在不精确数据中验证数据属于那个集合(Matlab fuzzy query data using the function
)
- 2011-10-17 11:26:01下载
- 积分：1
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Matlab
Matlab codes for descriptors
- 2014-01-28 18:01:26下载
- 积分：1
