nurbs_toolbox

二维功率谱密度换算一维功率谱密度的程序,对表面质量的计算尤为使用(two dimensional power spectral density to one dimensional psd)

说明：  一个人工智能的算法求解组合优化问题的源码(an artificial intelligence algorithms to solve combinatorial optimization problems FOSS)

dct隐写技术matlab实现资料。算法原理：通过在一个图像块中调整两个DCT系数的相对大小，隐藏秘密信息。 将载体图像分为8×8的块，做二维DCT变换 用来表示选中的两个系数的坐标对于第i bit秘密信息 if（要隐藏信息‘1’） make else make 逆DCT变换，还原图像 (dct steganography matlab implementation information. Algorithm principle: an image block by adjusting the relative size of the two DCT coefficients, hidden secret information. The vector image is divided into 88 blocks, making two-dimensional DCT transform coefficients used to represent the coordinates of the selected two for the first i bit secret information if (to hide information ' 1 ' ) make else make the inverse DCT, restore image)

说明：  煤焦在氧气氮气气氛下燃烧时内扩散因子的运算(Char under an atmosphere of nitrogen diffusion of oxygen within the combustion operation Factor)

“cppmathref2b.pdf”Matlab 6.5的C++数学库函数及用法详细参考手册，包含全部内容，很详尽，做Matlab和VC混合编程必不可少的工具书。(" Cppmathref2b.pdf" Matlab 6.5 for C++ Math Library function and the use of detailed reference manual, including all content, very detailed, so Matlab and VC hybrid programming tool indispensable.)

code can used for determining correlation value to analyze rho based on s11, s12, s21, s22.

用来学习matlab gui的各种小程序，配套《MATLAB GUI设计学习手记第二版》视频教程。(gui example)

通过此代码，实现OFDM调制。设定子载波个数为6，每个信道的比特数是4000(OFDM MODULATION)

说明：  删除新到下的LDPC度分布的matlab程序，帮助初学者进一步了解LDPC码的仿真。(Remove New LDPC degree distribution under the matlab program to help beginners learn more about the simulation LDPC codes.)

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.)