The paper proposes a method for determining the leakage in the gate of an electric drive armature by sound and ultrasonic signals using the Shannon and approximation entropy indices. The results of equipment diagnostics in laboratory and industrial conditions are presented. The results indicate the possibility of using entropy indicators as sensitive diagnostic features.

Keywords: electric drive armature, ultrasonic diagnostics, Shannon entropy, approximation entropy

This paper provides an overview of the types of existing natural gas consumption meters. A comparison is made of the instruments of various manufacturers present on the market. The main characteristics of the counters are named, the definitions for each characteristic are given. The problem of temperature compensation of flow rate depending on the temperature of the working medium is considered. The error in measuring gas at temperature differences leads to difficulties in predicting the consumption of energy resources. Two existing approaches to the solution of the problem are given. The ways of solution for the task of including metering devices in unified automated energy accounting systems are also shown.

Keywords: flowmeters of natural gas, diaphragm counters, automated metering systems, energy resources, thermal correction

In the article the technique of data processing of field and laboratory research of water-dissolved gases, osnovna on the use of the developed software and databases

Keywords: Water-soluble gases, software package, database, data processing

Тhe article deals with the malfunctions of the vehicle's brake system, resulting in uneven wear of the brake pads. Illustrations of damaged pads are given. Recommendations for troubleshooting are given.

Keywords: car, brake system, brake shoe, wear pads, malfunction

The article is devoted to the development of a multicriteria transport problem solution. As criteria, the minimal cost of transportation, the minimal time of transportation, the minimal overhead charges and the maximal volume of transportations were taken. Classical methods for solving multicriteria optimization problems are modified and adapted to the transport problem specification. In Visual Studio C # programming language, is used as a software package to solve the multicriteria transport task problem by one of the methods of linear convolution, or the main criterion, or compromise method or the method of guaranteed result and to compare the results obtained. The first paragraph is devoted to the formulation and mathematical model design of four-criterial transport problem. The second paragraph contains an example the application of guaranteed result method to solve transport problem. The next paragraph describes the program realization of transport problem with four criteria.

Keywords: four-criterial transport problem, method of potentials, initial symplex table, main criterium method, compromise method, lambda-problem, liniar convolutuin method, transporat carriages, program realization, multiplicative convolution, guaranteed result me

The article illustrates the problem of measuring the speed glider component targets in the presence of a turboprop effect of the reflected signal in a pulse-Doppler radar, proposed a model turboprop signal component and an algorithm for its suppression

Keywords: spectrum; radar; echo signal; turboprop effect; gliding component, micro-Doppler, radar

The main maintenance of a diversification of production as activity of subjects of managing is considered. being shown in purchase of the operating enterprises, the organizations of the new enterprises, redistribution of investments in interests of the organization and development of new production on available floor spaces. The most important organizational economic targets of a diversification of management are presented by innovative activity of the industrial enterprise.

Keywords: algorithmic design, generative design, digital method, parametrism, object genome, script, Grasshopper plugin, self-regulation, modeling tools, simulation, optimization process

In the work described and the criteria of layout of self-propelled forestry tractors, processing equipment(crane, chipper), mounting structure, capacity of mobile chippers. The system analysis on the choice of optimum arrangement is carried out.

Keywords: logging self-propelled tractor, hydraulic manipulator, chopping machine, system analysis

Dynamic memory devices are designed to generate a sequence of copies of a pulsed radio signal with a specified delay time. Such controllable devices can be considered as delay lines with a variable delay time and can be used in various signal processing systems. The results of statistical modeling of the influence of the parameters of couplers on the identity of the formed copies in a dynamic memory device with a binary fiber-optic structure are presented. The possibility of increasing the copy identity is proved by sorting the existing couplers when installing them into a binary fiber-optic structure. With a cascade number of more than 7, an increase in the identity of the copies is possible even when compared with the use of ideal couplers.

Keywords: dynamic memory device, binary structure, copy identity, coupler, tap coefficient

This article provides information about the state of the housing stock of the Russian Federation, provides statistical evidence, and the reasons for the current state of residential buildings and structures. The influence of modernization on the preservation and restoration of the housing stock of the Russian Federation is indicated, its expediency and main types of works are given, the results of modernization are presented

Keywords: housing stock, housing problems, modernization, operational parameter, the desirability of modernization, depreciation of the building, main types of works, replacement of equipment, add-in floors, changing the geometry of the premises

In the article results of the analysis of analytical dependences and results of the computing experiment executed in Lyr-CAD environment are considered. The purpose of the performed work is a quantitative assessment of the reduction in strength of beams of monolithic reinforced concrete overlappings caused by errors made during the performance of reinforcement work. In particular, an increase in the thickness of the protective layer of concrete and the consequent reduction in the working height of the section are considered. The data analyzed for both reference and span cross sections are analyzed. In total, four series of samples were selected, differing in the class of concrete (B15, B20, B25 and B30). Each series consisted of 9 samples having different working height sections in the reference and span sections. The working height of the section varied from 5 to 22%. The finite element model was created in the LIRA-CAD environment. In the course of the analysis, the effect of changing the working height of the section on the area of ​​the reference and passing reinforcement, selected for strength, was investigated.

Keywords: It is established that the degree of influence of the deviations of the position of the reinforcement from the design in the reference sections and in the span is different. The greatest danger is represented by the support sections, that is, the overlapp

In article the developed circuitry decision with high response characteristics of the multistage programmable attenuator very high frequency of power on the basis of low-sized microstrip elements and heterojunction GaAs HEMT of structures is considered. The main aspects of design and functioning of the diagram are described. Results of simulation mathematical modeling are given in a software package of Microwave Office.

Keywords: MMIC, low-sized microstrip structures, programmable attenuator, heterojunction, HEMT, GaAs, Microwave Office.

The authors examine the peculiarities of fiber-optic cable electric parameters changes under the influence of a strong homogeneous alternating electromagnetic field. Variants of the process which can be used to describe the influence of the electromagnetic field on the fiber-optic cable are proposed.

Keywords: Fiber optic cable, electrothermal degradation, kevlar, electrical conduction

The article deals with the design of bimetallic bridges, their advantages in comparison with reinforced concrete bridges. Its given the characteristics and chemical composition of conventional bridged steel and high strength steels. The scheme of dividing continuous lash of span structure into spans is considered and the ratio of spans with equal bending moments is calculated. Its given the calculation of an effective three-span system. The existing efforts and bimetallic standard blocks of three types are proposed for them. Blocks are made of two types of steel: conventional cross section of bridge steel, heavily loaded cross section of structural high tensile. In block A, the lower belt; in block B the lower belt, the wall and thongs of the orthotropic plate; in block K the lower belt and the beam wall is made of strong steel. Such unification will significantly reduce labor intensity and weight of the structure.

Keywords: bimetallic, span structure,steel grade,enveloping the diagram, normal stresses, mounting block, sheet hire

The econometric analysis of GDP per capita in the Russian Federation is being given. The number of the departured people from the Russian Federation, nominal average charged wages and exports volume are used as the exogenous variety. The received model of the multiple linear regression is being studied for quality.

Keywords: gross domestic product, GDP per capita, econometrics analysis, multiple linear regression model, endogenous variety, exogenous variety, heteroskedasticity