EWT20140424

绝对的lowe老人家提出的sift算法源码，配套有文档说明，对于初学者极度有用，还有我添加的注释我移植的仿射变换函数，绝对值得下的资源~！(The absolute lowe elderly sift algorithm proposed source code, supporting have documented for beginners extremely useful, and I add comments I transplanted affine transformation function, absolute worthy resource ~!)

共轭梯度法，优化算法的一种，具有二次收敛性，若目标函数为二次正定函数，经有限步可达到极小点(Conjugate gradient method, an algorithm with quadratic convergence, if the objective function is quadratic positive definite function can be achieved by the finite step minima)

说明：  函数子程序，用于多分辨率分解，使用 A trous 算法； 在分解的过程中，同时给出各级的细节和概貌，它们 和原数据有着同样的长度。(Function, subroutine, for multi-resolution decomposition, the use of A' trous algorithm in the decomposition process, and gives details of all levels and profiles, they have the same and the length of the original data.)

说明：  对示波器采集数据进行AR谱估计，并进行功率误差分析(Collecting data on the oscilloscope AR spectral estimation and error analysis of power)

说明：  从2维空间向三维空间的转换 matlab版的(From 2-dimensional space to three-dimensional space conversion matlab version of the)

sphere decoding for MIMO communication system (sphere decoding for MIMO communication sy stem)

六杆机构可以用来做插床和牛头刨床，六杆机构子程序(Six bodies can be used for grooving and Shaper, six institutions subroutine)

说明：  matlab图形化一个矩阵，并对矩阵进行重新排序(matlab a graphical matrix, and reorder the matrix)

计算在光纤长度一定时，不同功率抽运光对激光器输出特性的影响(A certain length in the fiber, the different power pump laser output characteristics on the impact of)

设采样频率为1Hz，对于淹没在复高斯白噪声中的信噪比为 的两个复LFM信号，采用子带带宽为0.1Hz的升余弦滤波器，共9个子带滤波器构成的滤波器组，时间窗为窗长为256的矩形窗，进行仿真(based sampling frequency of 1Hz. For drowned in the complex Gaussian white noise to the signal-to-noise ratio of 2 Minute LFM, using sub-band bandwidth of 0.1 Hz or cosine filter, a total of nine sub-band filter a filter group, time window to window to 256 long rectangular window simulation)