PRACTICA-4---DELTA

gaussian filtering for images

说明：  一个很好的模拟退火反演算法程序，例子是地球物理重力反演(A good simulated annealing inversion procedure, example is the geophysical inversion of gravity)

说明：  Mie散射系数也叫米散射的Matlab计算程序。 当球形粒子的尺度与波长可比拟时，发生的散射为米散射。此时必须考虑散射粒子体内电荷的三维分布。此散射情况下，散射粒子应考虑为由许多聚集在一起的复杂分子构成，它们在入射电磁场的作用下,形成振荡的多极子,多极子辐射的电磁波相叠加，就构成散射波。又因为粒子尺度可与波长相比拟，所以入射波的相位在粒子上是不均匀的，造成了各子波在空间和时间上的相位差。在子波组合产生散射波的地方，将出现相位差造成的干涉。这些干涉取决于入射光的波长、粒子的大小、折射率及散射角。当粒子增大时，造成散射强度变化的干涉也增大。因此，散射光强与这些参数的关系,不象瑞利散射那样简单,而用复杂的级数表达，该级数的收□相当缓慢。这个关系首先由德国科学家G.米得出，故称这类散射为米散射。 (Mie Efficiencies)

说明：  混沌计算程序源文件——包括计算Lyapunov指数的5种方法：C-C算法,最小数据量算法，G-P算法，关联维数法，互信息量法。(the original programs to calculate chaos in order to count the Lyapunov index out. Including 5 such methods: c-c method, minimum data method, G-P, mutual information method and correlation dimentional method.)

this is a matlab code for classify the iris dataset

实现维纳滤波用于语音增强。第一步采用频域谱函数计算最佳的维纳滤波器，再对输入带噪信号进行滤波；第二步是在此基础上的改进，用了自适应的思想，及时根据当前帧的状态更新修正滤波器的系统函数，得到更精确的无噪语音信号。第三步是采用自适应LMS方法，在时域迭代计算滤波器系数，迭代次数足够多时可得到较准确的有用信号。(Implement wiener filtering used in speech enhancement. First step optimum wiener filter is obtained by using the frequency spectrum function, again to input the signal with noise filtering The second step is the improvement on the basis of this, with the idea of adaptive, and in a timely manner according to the current frame updates correction system function of the filter, get a more accurate without noise speech signal. The third step is to use the adaptive LMS method, iterative calculation in time domain filter coefficient, the number of iterations enough to get the useful signal accurately.)

病态方程组的数值解法，Guass，Jacobi，SOR iteration，conjugate gradient method(numerical solution of ill-conditioned system of equations，Guass，Jacobi，SOR iteration，conjugate gradient method )

Generalized Bode plot for linear time invariant system (Bode plot on arbitrary contour).

eemd的源码,内含5个m文件，分别求取不同参数(the source code of eemd the source code of eemd the source code of eemd the source code of eemd...the source code of eemd)

LMS自适应算法matlab程序，能够运行(LMS adaptive algorithm matlab program to run)