曾晓明
逼近论,计算机辅助几何设计(计算几何)
个性化签名
- 姓名:曾晓明
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学术头衔:
博士生导师
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学科领域:
数学
- 研究兴趣:逼近论,计算机辅助几何设计(计算几何)
曾晓明,厦门大学数学科学学院教授(2000至今),博士生导师(2002至今)。1982年厦门大学数学系本科毕业并留校任教; 1989年厦门大学数学系获硕士学位;2002年厦门大学数学系在职获博士学位。1994年9月至1995年10月留学法国,在法国国家科学研究中心NICE大学数学所从事数学研究。 2001年再次赴法合作研究(高级访问学者,访问教授)。2002年9月至12月在美国KENTUCKY大学工程与计算机科学学院进行合作研究(访问教授)。多次被国际会议邀请作大会报告。研究成果得到国际同行的重视;有许多国际合作者,曾与美国、加拿大、法国、印度、德国、罗马尼亚等国的数学家和计算机专家密切合作,发表多篇合作研究论文。现任(2005年起)国际数学杂志《Journal of Mathematical Analysis & Approximation Theory》编委;现任(2007年起)国际数学杂志《European Journal of Pure and Applied Mathematics》编委。研究方向:逼近论,计算机辅助几何设计(计算几何)。曾主持国际合作项目2项;主持和参加国家自然科学基金项目和福建省自然科学基金项目多项。已发表学术论文70多篇,其中被SCI和EI收录40多篇;近年来论文已被SCI引用100多篇次;
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【期刊论文】Approximation properties of Gamma operators✩
曾晓明, Xiao-Ming Zeng
J. Math. Anal. Appl. 311(2005)389-401,-0001,():
-1年11月30日
In this paper the approximation properties of Gamma operators Gn are studied to the locally bounded functions and the absolutely continuous functions, respectively. Firstly, in Section 2 of the paper a quantitative form of the central limit theorem in probability theory is used to derive an asymptotic formula on approximation of Gamma operators Gn for sign function. And then, this asymptotic formula combining with a metric form Ωx(f, λ) is used to derive an asymptotic estimate on the rate of convergence of Gamma operators Gn for the locally bounded functions. Next, in Section 3 of the paper the optimal estimate on the first order absolute moment of the Gamma operators Gn(|t −x|, x) is obtained by direct computations. And then, this estimate and Bojanic-Khan-Cheng's method combining with analysis techniques are used to derive an asymptotically optimal estimate on the rate of convergence of Gamma operators Gn for the absolutely continuous functions.
Approximation properties, Locally bounded functions, Absolutely continuous functions, Gamma operators, Probabilistic methods
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【期刊论文】Computational formula of depth for Catmull-Clark subdivision surfaces
曾晓明, Xiao-Ming Zeng∗, X.J. Chen
Journal of Computational and Applied Mathematics 195(2006)252-262,-0001,():
-1年11月30日
In this paper, by introducing the concept of neighbor points and using the first-order difference of control points of Catmull-Clark surfaces, we obtain the rate of convergence of control meshes of Catmull-Clark surface. By the result of convergence we derive a computational formula of subdivision depth for Catmull-Clark surfaces.
Subdivision, Catmull-Clark surfaces, Rate of convergence, Control points
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【期刊论文】On the Rates of Approximation of Bernstein Type Operators
曾晓明, Xiao-Ming Zeng, and Fuhua (Frank) Cheng
Journal of Approximation Theory 109, 242-256(2001),-0001,():
-1年11月30日
Asymptotic behavior of two Bernstein-type operators is studied in this paper. In the first case, the rate of convergence of a Bernstein operator for a bounded function f is studied at points x where f (x+) and f (x-) exist. In the second case, the rate of convergence of a Szasz operator for a function f whose derivative is of bounded variation is studied at points X where f (x+) and f (x-) exist. Estimates of the rate of convergence are obtained for both cases and the estimates are the best possible for continuous points.
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曾晓明, Xiao-Ming Zeng and Wenzhong Chen
Journal of Approximation Theory 102, 1-12(2000),-0001,():
-1年11月30日
In this paper we estimate the rate of convergence of the Durrmeyer-Bezier operators Dn,α: (f, x) for functions of bounded variation and prove that the Dn, α: (f, x) converge to the limit 1/(α+1) f (x+)+α/(α+1)f(x-) for functions of bounded variation f (t). Our result improves and extends the result of S. Guo
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