optimization

This paper belongs to the field of systems engineering and is aimed at improving the qualitative indices of information technologies or systems with multidimensional characteristics (e.g. vector data coding design) with respect to reliability, precision and other significant operating characteristics of the systems based on the combinatorial configurations theory, namely the principle of optimal cyclic proportions (OCP).

In the paper considered the models of project portfolio’s formation and the allocation of resources between the portfolio projects under uncertainty, their advantages and disadvantages, the impact of organizational structures and modern software development technologies to reduce the uncertainty level, substantiated the necessity to use imitation to obtain decisions on planning in multi-project environment, offered structure of the simulation model.

This paper belongs to the field of systems engineering and is aimed at improving the qualitative indices of vector data information technologies (e.g. 2D vector data coding design) with respect to reliability, precision and other significant operating characteristics of the systems based on the combinatorial configurations theory, namely the Ideal Ring Bundles (IRB)s.

The article features revealed pricing for machine building products. The general approach to modeling the process of pricing for machine building products within the parameters of the demand for goods produced using this product. The building model performance optimization criterion prices and volumes of sales machine building company. Established the possibility of using performance optimization criterion prices for machine building  products to address the task of selecting the best varieties of products.

A bee colony optimization algorithm and its modifications as a way to solve the complex combinatorial optimization problems are described. Biological basis, advantages, disadvantages and usage of this method are studied.

Concept of coding systems optimizations based on vector combinatorial configurations (the Ideal Vector Rings models), with the optimization being embedded in the underlying combinatorial models, is regarded in this paper. This paper  is aimed at improving the qualitative indices of multidimensional vector data information technologies and computer systems with respect to transmission speed of vector data  with automatic error correction, and data security using a variety of multidimensional combinatorial configuration and finite cyclic group theory.

The article examines the algorithm increase the lifetime of wireless sensor network. The model performance optimization using a range selection transmission and mode active/sleep sensors

It is shown possibility for application a new class of spatial sets using multidimensional symmetrical and non-symmetrical combinatorial configurations "Ideal Ring Bundles" (IRB)s for vector data coding with minimal number of the digit weights.  Mutual connection theory of the symmetrical and asymmetrical sets with algebraic structures in Galois fields is developed.

The stability of solutions in the problem of architecture design for software system is examined in the paper with taking to the account the quality attributes for software system, obtained with Analytical Hierarchic Process. For this purpose, for different values of elements' inconsistencies in the matrix of pairwise comparisons, given as random numbers, were compared inconsistency criteria of decision for optimization problem obtained with a classical and with a modified Analytical Hierarchic Process.

Oxidation of tert-butyl alcohol (TBA) to methacrolein (МA) over Fe-Te-Mo-Ox catalyst (Cat), promoted by Ca(NO3)2 has been investigated. Promoter concentration, which was optimal by the МA yield, has been established (Ca/Mo = 0.05). Using catalyst of such type the MA yield was 87.1 % (calculated for supplied TBA) at the temperature of 663 K, process time of 2.5 s and TBA concentration of 7.0 % with concentration of water vapour in the air of 20 %. Under mentioned conditions TBA conversion was 100 %, isobutylene conversion – 95.5 %, selectivity by MA was 87.6 % and by CO2 – 2.4 %.