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generating_random_samples.m
根据一组样本数据的均值和协方差矩阵随机产生正态分布以及对数正态分布的任意规模的样本数据。(According to a set of sample data mean and covariance matrix randomly generated normal and lognormal distribution of the sample data of any size.)
- 2013-10-02 08:58:18下载
- 积分：1
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DCTlicheng
研究表明，构成K一L变换矩阵的向量也就是ToePhtz矩阵的特征向量。与此同时，离散
余弦变换矩阵逼近于ToePutz矩阵的特征向量矩阵，所以离散余弦变换矩阵与自然图像的
K一L变换矩阵十分相似。经过离散余弦变换后的变换系数块的协方差矩阵Cy非常接近对角
阵，即除了对角线元素以外，其它很多元素都近似为0，并且在左上角集中了主要能量。这
反映了自然图像大部分区域变化不大，亮度突变只占少数，即图像能量以低频成分为主的特
性。通过变换后的量化，舍弃对视觉效果影响较小的次要信息，可达到进一步的压缩效果。
虽然从去相关性能的意义上讲，DCT是一种次于K一L变换的准最佳变换，但是从算法实现的角度来看，DCT则远远优于K一L变换。首先，当图像的分块大小确定后，DCT的变换矩阵也就随之确定了，不随输入信号的统计特性变化而变化 其次，二维DCT能够分解成两次一维DCT，有利于硬件实现。
(Studies have shown that constitute a K L transformation matrix vector is ToePhtz eigenvector of the matrix. At the same time, discrete
The cosine transform matrix approximation in ToePutz matrix eigenvector matrix, so the discrete cosine transform matrix and natural images
Is very similar to a K L transformation matrix. After discrete cosine transform, the transform coefficient block of Cy is very close to the diagonal of covariance matrix
Matrix, namely except diagonal elements, many other elements are approximate to 0, and focused the main energy in the upper left corner. this
Reflects the natural images most area changed little, brightness mutations accounted for only a few, the energy is given priority to with low frequency components of image
Sex. Through quantitative after transformation, abandoning smaller effect on the visual performance of secondary information, can achieve further compression effect.
Although from related to the performance of the sense, DCT is a kind o)
- 2013-11-25 16:00:24下载
- 积分：1
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power_HEV_powertrain
混合动力汽车的仿真模型，在修改参数之后，可以广泛用于电动汽车的开发与仿真。(Hybrid simulation model, the modified parameters, can be widely used in the development of the electric car and simulation.)
- 2015-07-06 14:53:03下载
- 积分：1
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acquisition-for-DF
说明： 这是一篇关于GPS信号的捕获文章，采用的是DF差分相关捕获的算法，具有在较低信噪比的情况下捕获信号(This is an article about the capture of GPS signal, using the DF algorithm to capture differential associated with low signal to noise ratio in the case of capture signal)
- 2011-03-09 15:14:39下载
- 积分：1
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huidu
最大熵图像分割，希望能帮助到大家~~~~~~~~~~~~(Maximum Entropy Image Segmentation)
- 2010-05-06 01:29:28下载
- 积分：1
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range-kuta_4
range kutta 4 matlab program
- 2012-04-23 20:33:07下载
- 积分：1
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robotmove
this is matlab for codesing
- 2012-08-02 13:36:29下载
- 积分：1
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coordinate
利用matlab的基本方法，求出矩阵的逆，体现matlab的矩阵功能。(Matlab using the basic method to derive the inverse matrix, the matrix reflect the matlab function.)
- 2008-06-15 08:23:42下载
- 积分：1
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matlabpmsmdtc
永磁同步电动机直接转矩控制系统研究，内容新颖，浅显易懂(Permanent Magnet Synchronous Motor Direct Torque Control System, innovative, and easy to understand)
- 2016-07-15 11:10:49下载
- 积分：1
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ruilixindao
瑞利信道的仿真，里面有瑞利的文档知识，仿真最后出瑞利分布的概率分布密度图和多普勒滤波器的频响图(Rayleigh channel simulation, which has knowledge of the Rayleigh documentation, simulation finally the probability distribution of the Rayleigh distribution density map and Doppler filter response chart)
- 2013-05-26 18:57:05下载
- 积分：1
