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<正> 前言本文对非均匀网的三次基样条,提出一种节省内存的贮存方法.运用三次 Spline 函数的保凸性和它的基样条表示法的线性迭加原理,文中提出了一种光顺方法,并对五种端点条件进行了论述.此方法使修顺过程简单直观、计算过程稳定、运算量小、且偏离原始型值点较小.按上述方法在 DJS-21、TQ-16机上编制了 ALGOL-60语言程序,计算了大量曲线,将计算结果用于数控绘图和加工,收到了良好的效果。 相似文献
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A new stabilized finite element method which is different from Hughes and Franco's (1988) is presented for the Reissner-Mindlin plate model. The least square mesh-dependent residual form of the shear constitute equation is added to the Partial Projection scheme to enhance the stability. Using piecewise polynomials of order k≥1 for the rotations, of order k+1 for the displacement and of order k-1 for the shear, the kth order error-estimates are obtained. Besides, our computing scheme can be also applied to some lower order elements. All error-estimates are obtained independent of the plate thickness, and the stability parameter is an arbitrary positive constant. 相似文献
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