first_order_differ---solve

滤波程序，从同事那里要的，大家一起交流学习(BADNELL & BURGESS D.A.M.T.P. CAMBRIDGE C C DIAGONALIZATION OF REAL SYMMETRIC N-BY-N MATRIX Z. C C METHOD: HOUSEHOLDER REDUCTION TO TRI-DIAGONAL FORM AND SHIFTED C QL ALGORITHM TO DETERMINE THE E-VALUES AND E-VECTORS. C C BASED ON MARTIN, REINSCH & WILKINSON: NUM. MATH. 11, 181-95 (1968). C C INPUT REQUIRED. N, IUP AND Z. ONLY LOWER TRIANGLE OF Z NEED BE SUPPLIED. C MATRIX Z OVERWRITTEN BY EIGENVECTORS OF Z. C IUP=1/-1 ASC/DESCENDING SORT, 0 NO SORT. C MXMAT, IS THE ROW DIMENSION OF Z IN THE CALLING ROUTINE. C C OUTPUT. Z AND D, WHERE Z CONSISTS OF COLUMN EIGENVECTORS C AND D CONSISTS OF CORRESPONDING EIGENVALUES. C C NOTE: E IS A WORKING ARRAY. C)

求边界层方程的相似解法，使用四阶四级经典龙格库塔方法推进，适用于平板边界层，绕楔形体边界层流动等(Seeking boundary layer equations similar solution, using fourth-order Runge-Kutta method to promote four classic for boundary layer around the wedge boundary layer flow, etc.)

移动最小二乘曲线拟合原理，论文中分析了一维和二维的例子，并且同最小二乘法进行比较。(Moving least squares curve fitting principle, the paper analyzes the one-dimensional and two-dimensional case, and compared with the least squares method.)

FFT with fix point 2*N

光滑粒子（SPH）模拟couette流动，代码是根据刘桂荣老师《光滑粒子流体动力学-一种无网格方法》书后的代码改编，较实用，请需要的下载(Smoothed Particle (SPH) simulation couette flow, the code is based on Liu Guirong teacher " smoothed particle hydrodynamics- a non-grid method" Code adaptation of the book, more practical, please download required)

数值分析算法，该压缩包含有雅克比迭代算法、弦割法法及综合评测法等(Numerical analysis algorithms, the compression Jacobi iteration algorithm, France and France chord cutting and comprehensive evaluation method)

一个计算两个信号频率差的Matlab程序,主要用于求多普勒频偏。(A Matlab program to calculate the Doppler shift )

用來計算帶通濾波器相關參數，可以看出響應圖(Band-pass filter is used to calculate the relevant parameters can be seen in Fig response)

开源的克里金插值算法 开源的克里金插值算法(Open source Kriging interpolation algorithm)

以重力异常为例，对重力异常曲线进行圆滑和求导数。(This is a matlab code.It about smooth and derivative algorithm.)