... approximation by semiinfinite slopes 半无限斜率逼近 approximation by interpolation 插值逼近 approximation by rational functions 有理函数逼近 ...
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approximation by Hermite interpolation polynomials 埃尔米特插值多项式逼近
Spectrum interpolation method is obtained by use of approximation interpolation, from algorithm comparison of discrete system matrix, and some useful results are obtained.
从离散系统状态转移矩阵的算法比较方面。借助逼近插值给出频谱插值法，结果较为实用。
The meshing stiffness is calculated by employing 3-dimensional FEM and its function is formed by cubic spline interpolation and approximation of the discrete mesh points in a mesh period.
采用三维有限元法计算了斜齿轮副啮合刚度，用三次样条插值拟合得到时变啮合刚度函数。
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