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2009年05月27日

【期刊论文】Invariant characters of information systems under some homomorphisms

马逸尘， Li Deyu *， Ma Yichen

Information Sciences 129(2000)211-220，-0001，（）：

-1年11月30日

摘要

An information system is one of the very important mathematical models in the field of artificial intelligence. The notion of an information system homomorphism as a kind of tool to study the relation between two information systems was introduced in J.W. Grzymala-Busse (Algebraic properties of knowledge representation systems, in: Proceedings of the ACM SIGART International Symposium on Methodologies for Intelligent Systems, Knoxville, 1986, pp. 432

Rough set theory， Indiscernibility relation， Information systems， Super-uous attribute， Information system homomorphism

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2009年05月27日

【期刊论文】A TWO-GRID METHOD FOR THE STEADY PENALIZED NAVIER-STOKES EQUATIONS ※1)

马逸尘， Chun-feng Rcn， Yi chen Ma

Journal of Computational Mathematics, Vol. 22. No.1, 2004, 101-112，-0001，（）：

-1年11月30日

摘要

A two-grid method for the steady penalized incomprcssiblc Navicr-Stokes equations is presented. Convergence results arc proved. If h=O(h3-s) and ∈=O(H5-2s) (s=0 (n=2); s=1/2 (n=3)) arc chosen, the convcrgcnce order of this two-grid method is the same as that of the usual finite element method. Numerical results show that this method is efficient and can save a lot of computation time.

Penalized Navicr-Stokes equations， Two-grid method， Error estimate， Numer-ical test.，

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马逸尘邀请

西安交通大学，陕西

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