pattern

Алгоритмічна оцінка оптимальності результатів кластеризації за критерієм відстані

The algorithmic approach to the evaluation optimality of clustering results by distance criterion is proposed. The approach is based on solving two-criterion optimization by building and evaluating the optimality criteria in the form of index functions.

The figurative approach to calculate the amount of information and estimates its values

Existent approaches to determination of basic concepts of information theory, coming from the statistical reasoning (classic approach), theory of algorithms (algorithmic approach) and theory of pattern recognition (vivid approach) are examined. Their comparative analysis is conducted. Approach which enables in number to estimate the value of information is offered.

Rectillinear arrays and their combined radiation patterns

A disadvantage of simple antenna is they do not always perform to specified requirements, such as the required width of the main lobe of radiation pattern (RP). In response, we often utilize straight array (SA) containing N emitters; each of which is employed as a simple antenna. The distance ‘d’ and the current phase difference ‘h’ between adjacent emitters are permanent.  Requirements to insure SA are given depending on F (θ) – normalized RP multiplier of SA to the angle θ of spherical coordinate systems.

Патерни проектування вимог до інформаційної системи

This paper is devoted to the definition of «pattern design requirements for an information system». A theoretic-categorical model of the pattern is proposed, the place of patterns in the information technology development and analysis of requirements for information systems is defined.