Vv(CRH3)

读取IGS数据中心提供的sinex文件 并恢复法方程(Read sinex file IGS data centers and to restore normal equation)

此程序用于sgy地震数据添加噪声，输入文件名为pp.sgy，输出文件名为ppwithnoise0.8.sgy（可修改），参数d为添加的随机噪声系数（一般取0~1.0）。

康国政基于ow-af模型，采用Mises屈服准则针对ABAQUS本构模型进行二次开发，子程序类型为UMAT。可以计算3D/轴对称实体和平面应变单元。(Fully implicit integration of the combined ow-af model for 3d/axisymmetric soild and plane strain element.)

轴承热弹流计算程序，很好用。可以计算高端轴承。(thermal、elastic DEFORM and fulid model，solving reynold eqn)

计算系统的lyapunov指数，利用wolf方法。(Lyapunov exponent calculated using the wolf approach.)

采用Drucker-Prager本构，利用ansys的umat进行边坡稳定性分析，求解可获得等效塑性应变(Using Drucker-Prager constitutive model and ANSYS UMAT to analyze slope stability, the equivalent plastic strain can be obtained)

umat基础知识教学，适合刚接触UMAT的新手做参考(UMAT basic knowledge teaching, suitable for beginners)

The model used for creating the reference voltage is shown in Fig. 4. First, photovoltaic output current (Ipv) and output voltage (Vpv) are passed through a first order low pass filter with a magnitude of G = 1 and a time constant of T = 0.01 seconds in order to filter out the high frequency components or harmonics from these signals as shown in Fig. 5 and Fig. 6. The filtered current and voltage signals (Ipv_F and Vpv_F) are then fed into the MPPT control block that uses the Incremental Conductance Tracking Algorithm. An algorithm that is based on the fact the slope of the PV array power curve shown in Fig. 7 is zero at the Maximum Power Point (MPP), positive on the left of the MPP, and negative on the right. The MPP can thus be tracked by comparing the instantaneous conductance (I/V) to the incremental conductance (∆ I/∆ V) [11] as in (1):

地球科学：重力场积分(Fortran90) Stokes/Hotine/V_M垂线偏差积分：数值积分、二维平面FFT、二维球面FFT、一维FFT(Earth Sciences: Gravity Field Points (Fortran90) Stokes/Hotine/V_M deflection of the vertical integration: numerical integration, the two-dimensional plane FFT-dimensional sphere FFT, one-dimensional FFT)

求解线性方程组，高斯消去法精确求解出任意个方程组的解，(Solving linear equations, Gaussian elimination exact solution,)