http://tainguyenso.vnu.edu.vn/jspui/handle/123456789/90 2026-05-22T22:32:35Z http://tainguyenso.vnu.edu.vn/jspui/handle/123456789/785 A graphical editor for the statecharts language Tran, Vu Viet Anh; Nguyen, Viet Ha Statecharts is a specification language which is derived from finite–state machines and it is a powerful visual formalism for specifying discrete event systems. Statechart diagrams capture the behaviour of entities by specifying the responses to possible event instances. Statecharts language has also a lot of features for diagram structure. Until now, some tools and software are developed to construct Statechart diagrams, however, they are neither complicated nor difficult. This paper presents a new graphical editor for the Statecharts graphical language with hierarchy, flexibility, and simplicity. VNU. JOURNAL OF SCIENCE, Mathematics - Physics, Vol. 21, No.3, 2005 2005-01-01T00:00:00Z http://tainguyenso.vnu.edu.vn/jspui/handle/123456789/782 Polynomial approximation on polydisks Kieu, Phuong Chi In this paper we give results about polynomial approximation on the closed polydisk in $\Bbb C^n$. VNU. JOURNAL OF SCIENCE, Mathematics - Physics. Vol. 21, No. 3 - 2005 2005-01-01T00:00:00Z http://tainguyenso.vnu.edu.vn/jspui/handle/123456789/774 Three-phase polyme nanocomposite material Nguyen, Dinh Duc Today, nano composite material is being studied and widely used for defence security and economic development. Keeping researching on the mechanic of three-phases nano composite in which two-phases is grains of pad and the structure of one-phase in reinforced two-phases is a nano structure, basing on consideration for interaction of the polyme matrix and grains of padding, we have defined engineering constants of the three-phases polyme composite nano material. VNU. JOURNAL OF SCIENCE, Mathematics - Physics, Vol. 21, No. 3, 2005 2005-01-01T00:00:00Z http://tainguyenso.vnu.edu.vn/jspui/handle/123456789/768 Stability of the elastoplastic thin round cylindrical shells subjected to torsional moment at two extremities Dao, Van Dung; Hoang, Van Tung An elastic stability problem of the thin round cylindrical shells subjected to torsional moment at two extremities has been investigated in the paper [6]. By the small elastoplastic deformation theory and by the flow theory, this problem again has been studied in [2] and [4]. Basing on the theory of elastoplastic processes the above mentioned problem has been solved by approach simulation of instability form of the cylinder (see [1],[5]). In this paper, the solution of problem in the real bending form of structure has been found. We have also established the relations for determining critical force. Some numerical results for a linear hardening material have been given and discussed. VNU. JOURNAL OF SCIENCE, Mathematics - Physics. Vol. 21, No. 3 - 2005 2005-01-01T00:00:00Z