摘要
应用二阶Lagrange插值多项式的函数逼近进行曲线图形数字化。用AutoCAD中VBA程序绘制逼近曲线,与原曲线比较,验证插值多项式系数的准确性。以无套管穿越计算为例,给出了应用步骤。通过曲线数字化,将人工查图转变为编程计算。
The curve digitization is performed using functions approximated by the second-order Lagrange interpolation polynomial. The approximation curve is drawn by AutoCad VBA program. The ac- curacy of the interpolation polynomial coefficient is verified compared with the original curve. The appli- cation procedures are given taking calculation of an uncased crossing project for example. The manual look-up is changed into programming calculation through the curve digitization.
出处
《煤气与热力》
2012年第4期37-39,共3页
Gas & Heat
关键词
曲线图形数字化
二次曲线逼近
二阶插值多项式
curve digitization
secondary curve approximation
second-order interpolation pol- ynomial
