Vol 21, No 3 (2013)

The current trends of the Smart Grid concept are described .The creation of an intellectual customer-centric system of gas, heat and electricity supply is described as a solution to the corresponding problems the creation of the intellectual customer-centric system of gas, heat and electricity supply is proposed. As a prototype of such a simulation modeling and the adaptive resource allocation in integrated networks of resource supply system is given.

The generalized structure for the selection of alternatives, which allows for stages of conceptual and formal modeling of complex technical systems, and object-oriented specification reasonably determine the composition and structure of the problems to be solved in the emerging information system to support decision-making and to determine the composition and structure of the query to the appropriate Multiple-based models and complexes.

Waterflooding is one among several second oil recovery methods and it produces a high oil recovery rates by injection water into the oil keeping formation. Increasing waterflooding efficiency using by optimal well location scheme is an actual task. To achieve the corresponding goal we propose a program tool for well location schemes compare, both of by quantitative and qualitative characteristics. The program realization based on the oil keeping reservoir pattern represented a homogeneous formation with fixed thickness and infinite borders covering by dual periodical lattice: it includes production and injection wells into her cells. Also this lattice requires dual periodical property from the speed function defined on her cells. So we had used modified Weierstrass dzeta-function to describe oil-water filtering process in modeling reservoir.

The new approach to the solution of a problem of raw materials supply management for the industrial enterprises which distinctive feature from existing is use of the classical means of the automatic control theory for designing of models, criteria and algorithms of supply management is stated. The example of the supply management systems model designing in the form of transfer functions and the results of numerical modeling of controlled processes in the software package Simulink are given.

The analytical method «A tree of decisions: CART» is considered and applied. Options of obtaining expected values of power consumption are considered. Errors of forecasting are analyzed.

Experimental investigations on aircraft surface reflecting characteristics were carried out. Reflectance behavior at pulse-periodic action at different intensity value was estimated. During investigation parameters of sound laser beam influence at probability of detecting and recognition the laser location installation was used. Contrast from incident angle, light wave and relative pulse duration dependencies were received. The experimental estimation of light wave to detecting probability influence at the aircrafts surfaces distance sounding was carried out.

Relationship between presence of some bacterial genera on internal surface of oilfield equipment (adhesion forms of corrosion caused bacterial consortium) and corrosion of this equipment was revealed. The typical structure of bacterial consortium caused corrosion of oilfield equipment was determined.

This paper contains comparative analysis of hardenability of end quenching test and values calculated by chemical composition in accordance with ASTM A 255. Hardenability estimates by hardness on 6.5 mm and 30 mm depth from standard sample surface. Analytic formulas (ASTM A 255) are shown to be not applicable for these steels. Analytic equations «Hardness - Chemical composition» which predict hardness on 6.5 and 30 mm depth from standard sample surface with quite high accuracy were determined by regression analysis. These equations can be used for hardenability analysis of these steels if the input control of rolled metal quality instead of currently used hard gradient quenching method.

Semicircular profile cut radius influence on cylindrical solid and hollow specimens made of steel 20 with 25 mm diameter endurance limit has been examined under outstripping superficial plastic deforming. It’s established that the endurance limit decreases with the increase of cut radius from 0,3mm to 1mm under the same type of hardening. It should be increase the specimens hardened superficial lay thickness under outstripping superficial plastic deforming for hardening effect conservation.

A complete system of rigid body dynamics equations applied to railcar body is introduced. This equation system is to model rail car multibody dynamics and to determine loads exerted on car elements in order to improve stability and safety of movement.

The nature of intensity change of total strain values of magnetic field of industrial frequency in the form of circular charts and maximum values round power three-phase four-vein cables of power supply systems for symmetric and not full-phase modes of loading is shown.

The problem of determining the parameters of the equivalent circuit of asynchronous electric motors with squirrel-cage rotor and slip ring on the catalog data in order to build their mechanical characteristics is considered. Method for determining the parameters of the equivalent circuit with subsequent evaluation of the results of convergence solutions is developed.

The most widespread types of refusals of automobile generating installation are considered. The general factors and the reasons of emergence of refusals are revealed. Recommendations of their elimination and the prevention are given.

The exact analytical solution of the hyperbolic equation describing viscous fluid flow within a simple pipeline in surge is obtained.

The paper considers the stability of the nontrivial equilibrium position dynamic model of the competitive behaviour of the two economic agents, described the system of nonlinear differential equations with retarded argument.

Questions of oil components breakdown and hydrogen sulphide formation in the furnaces are described. Method of assessment of the process intensity is offered.

Fluid conductivity sensor is considered. The error of sensor is reduced through the use of test methods to improve the accuracy of measurement.