articles

The numerical estimations of functions of sensitivity of probability of destruction from a variation of statistical parameters load capacity and fatigue properties of a material with reference to bearing details spindle connections of a drive of the rolling mill are presented, their analysis and the proved recommendations are resulted. the methodology and a complex of computer programs allow to formulate requirements to parametres of technological process, to properties of a material and manufacturing techniques of details, and also to load capacity and to the service conditions of the equipment providing their set resource.

A mathematical model for market stock prices forecasting within time periods from one to six months was developed. The model is based on modern signal processing methods and Markov chain theory. High forecasting accuracy regardless of stock prices probability distributions parameters and the model’s parameters adaptability due to calculations information storing are the model advantages. Economists, traders and students engaged in mathematical methods of financial markets behavior forecasting will be the most likely users of the model.

Industrial enterprise information resources management method describing separate components of a control system is considered. The method is based on using the set of interconnected mathematical models. The models presented incorporate graph theory, fuzzy logic and cognitive modeling methods modifications.

Creation of radio electronic equipment for space vehicles is a set of complex iterative processes involving a numerous specialists in various fields. Information systems and data management methodologies provide structured project information storing and rapid data exchange between team members. The paper deals with the problems of engineering specifications (bill of materials) creating and managing them with ENOVIA SmarTeam software package.

A number of software effort estimation and release date prediction methods have been developed. However these methods are not handy and don’t work well in changing software life cycle environment. Ease of use and particular project information incorporation are the major benefits of a genetic approach presented in this paper.

Operator-Logical Diagrams (OLD) with step by step instructions are very useful and descriptive tool that facilitates new learning data perception. An analysis of algebraic structure of symmetry group based on its Cayly graph construction problem and implementation of automaton with memory were chosen to demonstrate the OLD approach advantages. OLD benefits regarding their application for the basic domain models study are discussed.