The problems include modifying the local shape for subdivision curves and surfaces, the subdivision schemes for NURBS etc.
细分曲线曲面的可局部修形性，对NURBS细分算法的研究等。
Most of the known methods produce the sharp features by modifying weights of geometric rules of primitive subdivision schemes.
已有的尖锐特征造型方法基本都是在原来细分模式的基础上通过修改几何规则来达到目的。
The new four kinds of subdivision schemes is not only to keep smooth of limit curve, but also has excellent quality of keeping shape of initial polygon.
这一类细分模式在满足极限曲线的光滑性外，还具有保持初始多边形形状的优良性质。
One problem in subdivision surfaces is the number of facets grows exponentially with the level of subdivision. Subdivision schemes are cost intensive at higher levels of subdivision.
细分曲面存在的一个问题是随着细分次数的增多，网格的面片数迅速增长，巨大的数据量使得细分后的模难以进行其它处理。
This paper contrasts and researches Chinese Library Classification (CLC) and Library of Congress Classification (LCC) on the class notes, subdivision schemes and schedule structures.
论文从标记符号、复分表和体系结构三个方面对《中图法》与《美国国会图书馆分类法》进行了对比研究，并给出了两者的类号对照表。
Furthermore, the property of the linear combination of the difference schemes of the same order is analyzed, which can help to devise more convergent curve subdivision schemes with several parameters.
给出了同阶差分格式线性组合的性质，从而可设计出更多收敛的多参数曲线细分格式。
This paper proposes a unified framework for the two distinct schemes, defines the composite subdivision operation, and also analyzes some popular schemes.
为两种不同的模式提出了一个统一框架，定义了复合细分操作，并对当前流行的几种模式进行了分析。
This paper proposes a unified framework for the two distinct schemes, defines the composite subdivision operation, and also analyzes some popular schemes.
为两种不同的模式提出了一个统一框架，定义了复合细分操作，并对当前流行的几种模式进行了分析。
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