国家自然科学基金(Y6090211)

作品数：3被引量：2H指数：1
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Rational cubic/quartic Said-Ball conics被引量：2
《Applied Mathematics(A Journal of Chinese Universities)》2011年第2期198-212,共15页HU Qian-qian WANG Guo-jin 
Supported by the National Natural Science Foundations of China(61070065, 60933007);the Zhejiang Provincial Natural Science Foundation of China(Y6090211)
In CAGD, the Said-Ball representation for a polynomial curve has two advantagesover the B′ezier representation, since the degrees of Said-Ball basis are distributed in a step type.One advantage is that the recursive ...
关键词：Rational Said-Ball curve Rational B′ezier curve conics. 
Representing conics by low degree rational DP curves
《Journal of Zhejiang University-Science C(Computers and Electronics)》2010年第4期278-289,共12页Qian-qian HU Guo-jin WANG 
supported by the National Natural Science Foundation of China (Nos.60873111 and 60933007);the Natural Science Foundation of Zhejiang Province,China (No.Y6090211)
A DP curve is a new kind of parametric curve defined by Delgado and Pena （2003）; Jt has very good properties when used in both geometry and algebra, i.e., it is shape preserving and has a linear time complexity for ...
关键词：Conic sections Bernstein basis DP basis Rational low degree Bezier curves Rational low degree DP curves 
The least squares problem of the matrix equation A_1X_1B_1~T+A_2X_2B_2~T=T
《Applied Mathematics(A Journal of Chinese Universities)》2009年第4期451-461,共11页QIU Yu-yang ZHANG Zhen-yue WANG An-ding 
supported in part by the Social Science Foundation of Ministry of Education(07JJD790154);the National Science Foundation for Young Scholars (60803076);the Natural Science Foundation of Zhejiang Province (Y6090211);Foundation of Education Department of Zhejiang Province (20070590);the Young Talent Foundation of Zhejiang Gongshang University
The matrix least squares （LS） problem minx ｜｜AXB^T--T｜｜F is trivial and its solution can be simply formulated in terms of the generalized inverse of A and B. Its generalized problem minx1,x2 ｜｜A1X1B1^T ＋ A2X2...
关键词：least squares problem generalized inverse solution set general solutions parameter matrix 
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