Bivariate 3-direction is a triangulation with the least directions. Box spline built on it is widely applied in CAGD.
二元三方向剖分是方向最少的三角剖分，建立在其上的二元三向四次箱样条在CAGD等领域有着广泛的应用。
The distance from 3-direction quartic box spline surface to the central triangular planar patch of its control net is investigated as well as its bound.
研究了三向四次箱样条曲面与控制网格中心三角平面片间的距离和该距离的界。
The spline Ritz method was proposed and used to analyse the shear lag effect of box girders.
结合样条函数和里兹法提出薄壁箱形梁剪力滞效应计算的样条里兹法。
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