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一种精度可控的CAD网格模型及轻量化算法的研究 被引量:5
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作者 刘云华 饶刚毅 +1 位作者 罗年猛 朱林 《计算机应用研究》 CSCD 北大核心 2014年第10期3148-3151,共4页
针对现有三维CAD系统中,CAD网格模型显示精度固定,难以动态调整以及细分后网格数量过多等瓶颈问题,在原始模型基础上,结合CAD模型中边、面等几何与拓扑信息,提出了一种精度可控的三维CAD网格模型。根据该模型的结构特点,采用曲面内部插... 针对现有三维CAD系统中,CAD网格模型显示精度固定,难以动态调整以及细分后网格数量过多等瓶颈问题,在原始模型基础上,结合CAD模型中边、面等几何与拓扑信息,提出了一种精度可控的三维CAD网格模型。根据该模型的结构特点,采用曲面内部插值与边界曲线插值相结合的轻量化分类细分算法来实现模型精度调整,并有效控制细分后的网格数量,可满足三维CAD系统对模型精度可控、减少网格数量的需要。 展开更多
关键词 CAD网格模型 曲面内部插值 边界曲线插值 分类细分算法 精度可控 网格数量
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Study based on "Situational Rationality" hypothesis for customer market classification model 被引量:1
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作者 LI Chang-qing WANG Xiao-lei Yang Xinjiletu 《Chinese Business Review》 2009年第3期33-45,63,共14页
The traditional market segmentation was based on "transcendental rationality" or "Situational Rationality", studies shows that it had disadvantages. This paper states the "Situational" integrated rationality hyp... The traditional market segmentation was based on "transcendental rationality" or "Situational Rationality", studies shows that it had disadvantages. This paper states the "Situational" integrated rationality hypothesis and then comes up with the market segmenting models and classification algorithm basing on this hypothesis. This algorithm combined the Rough Set theory and Neural Networks in application, which overcome the dilemma that caused complicated network structure and long training time by only using Neural Networks and influenced the classification precision caused by noise disturbance by only using Rough Set methods. Finally, the paper did a comparison experiment between the traditional method and the method we came up, the results shows that the model and algorithm has its advantage on every aspects. 展开更多
关键词 segmenting Situational Rationality Rough Set Neural Networks
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