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ghmm470
- 对具有随机噪声的二阶系统的模型辨识,进行标幺化以后系统的参考模型差分方程为: y(k)=a1*y(k-1)+a2*y(k-2)+b*u(k-1)+s(k) 式中,a1=0.3366,a2=0.6634,b=0.68,s(k)为随机噪声。由于神经网络的输出最大为1,所以,被辨识的系统应先标幺化,这里标幺化系数为5。采用正向建模(并联辨识)结构,神经网络选用3-9-9-1型,即输入层i,隐层j包括2级,输出层k的节点个数分别为3、9、9、1个;由于神经网络的最大输出为1,因此在辨识前应对原系统参考模
RC
- 差分方程的递推解法,对于一个差分方程,如果能找出这样的数列通项,将它带入差分方程后,该方程成为恒等式,这个通项叫做差分方程的解。 -Recursive solution of differential equations, for a difference equation, if we can find this series passed it into the differential equation, the equations become identities, the ge
FDM_xiangqian
- 偏微分方程抛物型向前差分格式的C++程序-Parabolic partial differential equations forward differencing format C++ program
migration
- 程序为叠前偏移c语言程序,利用双程波波动方程有限差分法,此程序可以进行大角度成像。还有prestack common-shot split-step Fourier migration源代码-prestack fd migration,The 2-D prestack common-shot split-step Fourier migration
PML_10
- 交错网格声波方程正演模拟,PML吸收边界,比较适合刚刚接触的学者。交错网格有限差分地震波场计算,二维的声波正演,利用空间10阶,时间2阶。-The CalCulation of the SeismiC Wave一 fieldwith Staggered-grid Finite difference Sheme
Acoustic(PML)
- 一阶速度-应力弹性波方程高阶交错网格高阶有限差分数值模拟,PML吸收边界条件-An order velocity- stress elastic wave equation order staggered grid high-order finite difference numerical simulation, PML absorbing boundary conditions
基于声波方程有限差分数值模拟
- 基于声波方程有限差分数值模拟,这是中国海洋大学场论1课程的大作业。-Finite difference based on acoustic wave equation, which is the China Ocean University Field Theory 1 course a big operation.
waveforward
- 基于vs2008编程的有限差分波动方程正演,有2D和3D的-Based vs2008 programming finite difference method wave equation forward with 2D and 3D
MPI并行FDTD
- FDTD是时域有限差分方法计算电磁方程,本源码是MPI实现并行计算的方法
