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curvefitting
相关语句
  曲线拟合
    Based on the fit programming for tabulated curve and the application of numerical control processing, circular-arc spline function fitting and biarc fitting are effective ways of solving the problem of tabulated curvefitting.
    在对列表曲线拟合编程及应用于数控加工实践的基础上,提出圆弧样条函数拟合和双圆弧拟合是解决列表曲线拟合的有效途径。
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  curvefitting
The curve fitting methods are applied for each curve segment to remove the unwanted points with pre-determined tolerance.
      
The Solver, Microsoft Excel 2000 powerful optimization package, has been used to perform non-linear least-squares curve fitting.
      
Vibrational and rotational temperatures of N2 were determined using a curve fitting method on N2+ (1-) emission spectra, with the vibrational and rotational temperatures for N2 and N2+ being assumed equal.
      
The equivalent elastic stiffness was simulated by both finite element analysis in ANSYS? and a curve fitting in MATLAB?.
      
Using a nonlinear curve fitting method we calculate the incidence of AIDS cases through a study of reported data on cumulative AIDS cases.
      
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Building on mathematical theories of calculation geometric and function approaching method, circular-arc spline fitting and biarc fitting are gived for tabulated curve, circular-arc spline fitting is invariant in geometry , it is simple and accurate than other kinds of spline curve in calculation. Biarc fitting adopts the whole system of coordinates,does not give up very useful derivative information , has improved the precision of fitting, overcomes difficulties of large deflection, high precision, huge programming,...

Building on mathematical theories of calculation geometric and function approaching method, circular-arc spline fitting and biarc fitting are gived for tabulated curve, circular-arc spline fitting is invariant in geometry , it is simple and accurate than other kinds of spline curve in calculation. Biarc fitting adopts the whole system of coordinates,does not give up very useful derivative information , has improved the precision of fitting, overcomes difficulties of large deflection, high precision, huge programming, and avoids solving the nonlinear equation. Based on the fit programming for tabulated curve and the application of numerical control processing, circular-arc spline function fitting and biarc fitting are effective ways of solving the problem of tabulated curvefitting.

文章从计算几何、函数逼近论等数学理论出发,对列表曲线进行了圆弧样条拟合和双圆弧拟合。圆弧样条拟合法具有几何不变性,且圆弧样条的计算比其他的样条曲线简单、准确。双圆弧拟合法采用了整体坐标系,不放弃十分有用的导数信息,提高了拟合精度,克服了大挠度高精度及巨量编程的困难,特别避免了求解可能不收敛的非线性方程组。在对列表曲线拟合编程及应用于数控加工实践的基础上,提出圆弧样条函数拟合和双圆弧拟合是解决列表曲线拟合的有效途径。

 
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