Surveying_2006

用于求多多数据的均值和方差，希望对大家有用(Seek more data for the mean and variance, in the hope that useful)

finite element method code

三次样条插值函数边界条件由实际问题对三次样条插值在端点的状态要求给出.以第1边界条件为例,用节点处二阶导数表示三次样条插值函数,用追赶法求解相关方程组.通过Matlab编制三次样条函数的通用程序,可直接显示各区间段三次样条函数体表达式,计算出已给点插值并显示各区间分段曲线图.(Cubic spline interpolation function from the real problems of boundary conditions cubic spline interpolation is required to give the state of the endpoint. Boundary conditions in the first example, the second derivative with node represents a cubic spline interpolation function, solving equations associated with catch-up method group. preparation of common procedures cubic spline function through Matlab, can directly display each range segment cubic spline function body expression, to the point of interpolation has been calculated and displayed for each sub-interval graphs.)

三维有限差分算法，使用matlab编程，可以进行数值模拟(3-D FDTD code with PEC boundaries)

针对医疗中的心电信号，利用奇异性检测的方法检测R波的位置,并给出模极大曲线(against the medical ECG, the use of the singular method of detection of R-wave detection of the location, and gives modulus maxima curve)

利用差拍法求宽带阵列通道延时，可用于宽带阵列通道延时测量以及校正。(Computing the channel delay of broadband array by using beat method, which can be used for wideband channel delay measurement and calibration.)

simulator in matlab for WSN

fit_ML_normal - Maximum Likelihood fit of the laplace distribution of i.i.d. samples!. Given the samples of a laplace distribution, the PDF parameter is found fits data to the probability of the form: p(x) = 1/(2*b)*exp(-abs(x-u)/b) with parameters: u,b format: result = fit_ML_laplace( x,hAx ) input: x - vector, samples with laplace distribution to be parameterized hAx - handle of an axis, on which the fitted distribution is plotted if h is given empty, a figure is created. output: result - structure with the fields u,b - fitted parameters CRB_b - Cram?r-Rao Bound for the estimator value RMS - RMS error of the estimation type - ML

说明：  所传为共轭梯度法和线性加权法，这两种方法在优化中有较大的作用！(The transfer to the conjugate gradient method and linear weighted method, the two methods in optimization have a greater role!)

说明：  本压缩文件包含了用MATLAB做的几种fir滤波器，功能强大，可用性强！(This compressed file contains the use of MATLAB to do some fir filter, powerful, and the availability of strong!)