nw

说明：  计算时程信号数据的快速傅里叶变换，进行频谱分析(The fast Fourier transform of time history signal data is calculated and the spectrum analysis is carried out)

利用M序列作输入估计脉冲响应值，完成对连续和离散系统传递函数参数的辨识(Use of M sequence as the input impulse response estimated value to complete the continuous and discrete transfer function parameter identification)

使用Y矩阵来综合得到耦合矩阵M中各元素的matlab源代码(The Y matrix to obtain an integrated coupling matrix M of each element matlab source code)

施威德勒球壳在ansys中的建模分析，APDL语言(Of Schwedler shell modeling in ansys, APDL language)

利用c语言编写了迭代法解线性方程组的源程序，大大简化了计算量。(Use the C language source code of the iterative method for solving linear equations, which greatly simplify the calculation, suitable for solution of complex equations)

统计格点数据文件A和文件B中物理量间的相关系数，平均误差，均方根误差，绝对误差。(Statistics grid data file A and file B, the correlation between physical quantities, the average error, root mean square error, absolute error.)

三次样条曲线拟合代码，先训练，后差值，计算非常准确(Three times spline curve fitting, the first training, and after, computation is very accurate)

适用于ABAQUS的自定义材料子程序，适用于Johnson-Cook材料模型(Apply to custom material ABAQUS subroutine for Johnson-Cook material model)

对于协方差矩阵的一种计算方法，对于地震中的反演约束算法能起到很好的作用。(For a kind of covariance matrix calculation method)

电容层析成像的landweber算法演示程序，并有详细的说明。(The capacitive tomography of the landweber algorithm demonstrates the program and has a detailed description.)