Headings of the journal
"Educational Resources and Technologies"

Annotation: In this paper, the heat transfer in liquids and nanofluids in a cylindrical tube is investigated. The exact solution for the temperature of one-component fluid (water) is obtained. Numerical simulation of forced convection of water and water/ nanofluid is performed and the temperature distribution in the tube is found. As a re: sult, the efficiency of heat transfer in water/ nanofluid is investigated depending on nanoparticle concentration and flow ve-locity.

Annotation: Boolean algebra is a widely known algebraic method in logic. This algebra is a counterpart of the propositional calculus. To model the predicate calculus, Lindenbaum-Tarski algebra, polyadic Halmos algebra and other algebras were proposed. However, these algebras are too abstract and complicated for algorithmization. In the given paper, we describe our n-tuple algebra that can be thought of as a generalization of mathematical theory of relations.

Annotation: Thi sarticle demonstrates theinfluence of scale on results of complex decisions in methodology Analytic Hierarchy Process (AHP) by Tomas L. Saaty. Investigate questions of transitions to different scales for solving direct and inverse Saaty problems. The results of transitions are demonstrated for solving problem of verify classification.

Annotation: This paper presents an approach of estimation of the control objects and emergency sources based on the integration of OLAP and Expert systems technologies. OLAP-models for multi-dimensional analysis of monitoring data and dynamic analysis of principal parameters of control objects are presented. The criteria of emergency risk estimation using expert knowledge about critical levels of danger are suggested. The implementation of proposed solutions in automated systems that provide a comprehensive safeness of Krasnoyarsk region.