Dispersion Limited Fiber Length

matlab of analysis pictures(analysizing pictures )

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)

扩频通信 仿真的matlab源代码，仅供参考(Spread spectrum communication matlab simulation source code, for reference only)

it is used for the recovering speech from noise

semivariogram structure function ,it is about 2D semivariogram.

用于人脸检测的程序：GaborandBP。 可成功运行。(Procedure for face detection: GaborandBP. Can be run successfully.)

太阳黑子是人类长久以来感兴趣的问题。此处运用matlab代码对太阳黑子的记录的数据进行处理，希望能提供帮助( Using archival records,astronomers have applied Wolfer s rule to determine sunspot activity back to the year 1700. Today the sunspot index is measured by many astronomers and the worldwide distribution of the data is coordinated by the Solar Influences Data Center at the Royal Observatory of Belgium. The text file sunspot.dat in the matlab/demos directory has two columns of numbers. The first column is the years from 1700 to 1987 and the second column is the average Wolfer sunspot number for each year.)

根据蚁狮觅食行为启发而提出的一种群智能搜索算法，并进行标准函数测试，效果较好(A swarm intelligence according to the foraging behavior of ant lion heuristic search algorithm, and the standard test function, good effect)

机动目标一阶加速度的频率普分析，以及多普勒展宽，相干积累。以70km，径向速度700m，加速度20m/s^2目标为例(An acceleration of maneuvering target frequency bands Pu analysis, and Doppler broadening, coherent accumulation. To 70km, the radial velocity 700m, acceleration 20m/s ^ 2 goals, for example)

四阶龙格库塔法解常微分方程组 四阶龙格库塔法解常微分方程组(4-Runge-Kutta)