The questions of decision-making are considered at the development of a complex tourist product, which includes places of leisure and recreation, relocations, places of residence and others. The multicriteria problem of choosing the optimal variant of the tour with the given criteria and user ratings has been set and solved. The proposed model can be used to build a decision support system for the development of tours around Russia.

Keywords: decision theory, expert assessments, the theory of formal languages ​​and grammars, optimization, intellectual systems

The growing interest in travel around Russia and the lack of information support determine the relevance of developing decision support systems in the tourism industry. The work presents the results of information modeling of such a system that allows, based on monitoring of thematic Internet resources, to create a database of tourist sites and events, places of residence, transport routes and based on user estimates, form a completed tourist product that appropriate the requirements. The obtained models are the basis for the development of the software environment.

Keywords: information modeling, universal modeling language UML, decision support system

The article is devoted to the development of metrological assurance in the field of experience based on solving optimization problems with the involvement of simulation and statistical models. This technique will improve the accuracy of decisions and reduce the time of development of technology. It is important to establish a system of views on the organization of metrological support of field experience on the basis of a system approach, taking into account the relationship and interaction of the various elements and processes of metrological assurance. The article describes an example of measurement processing of a multifactorial field experiment with application of simulation models, produced on the basis of the identification of correlations, tightness and shape which describe the regression equation or the correlation equation, which allows to obtain accurate solutions.

Keywords: field experience, observation, and optimization technologies, simulation model, regression, correlation, correlation coefficient

In this paper, the temperature distribution from a point source of heat under convective heat transfer is studied. The Navier-Stokes equation describing the steady two-dimensional laminar motion of a fluid is solved numerically. The distribution of the temperature field of a heat-loaded point source is obtained under appropriate boundary conditions, supplemented by the boundary conditions for the flow velocity to equal zero on the paraboloid walls by numerical integration using the control volume method.

Keywords: Radiator protrusion shape, thermal conductivity, thermal apparatus mode, the temperature of the heat source

The analysis of publications and the results obtained in the field of dynamic behavior of inhomogeneous beams and rods based on foreign press materials is performed. The work consists of an introduction and six sections. The introduction discusses the relevance of the problems associated with the study of inhomogeneous beam vibrations. The second part is devoted to highlighting the achievements in the development and application of analytical methods. The next paragraph deals with various aspects, reflecting the variety of dynamic phenomena arising in geometrically heterogeneous beam structures. Results related to modeling of conical, stepped beams and rods having different types of geometric features are discussed. The fourth section considers the state of the art for dynamic problems for physically inhomogeneous beams. It is shown that structural heterogeneity can be associated not only with material properties, but also arise due to external influences, such as inertial and temperature loads. Considerable attention is paid to questions related to the effective use of structurally heterogeneous beams in the field of architecture, construction, robotics, aeronautics and other innovative fields. The sixth and seventh paragraphs give an overview of the existing numerical approaches for an approximate and reliable description of the dynamic processes taking place in inhomogeneous beams. Different industrial software packages are discussed that allow solving dynamical problems of beams with varying physical and geometric properties within a reasonable time and with a high degree of accuracy. In the seventh, the final part, much attention is paid to the application of the finite element method.

Keywords: dynamics, a beam with a variable cross-section, eigenvibrations, numerical methods, structural inhomogeneity, finite element method, functionally graded materials

The article is devoted to the problem of data protection from interception as a result of the "man in the middle" attacks. The proposed technique for detecting these attacks is based on the analysis of the headers of transit packets passing through the default gateway. Based on the data obtained, a table of correspondence between IP and MAC addresses is constructed, for which software provides up-to-date and reliable information. The addresses of packets passing through the gateway are compared with the records in this table and, in case of a mismatch and impossibility of confirming the correctness of addresses in the headers of the channel and network layers, it is concluded that there is an additional intermediate node in the network that appeared as a result of the default gateway substitution. The article presents approaches to software implementation of this technique, describes the packet analysis algorithm.

Keywords: local area network, man-in-the-middle, DHCP-spoofing, ARP-poisoning, traffic analysis, gateway, network address, packet, ARP-table

The article examines the effect of polytitanate potassium intercalated copper on the structure and physico-mechanical properties of composite materials containing as a filler. Matrix composite material is a mixture of polyethylene 277 and copper-polymer complex of polyacrylamide. It is shown that the pre-intercalation of polytitanate potassium copper improve of physico-mechanical properties of the composite material.

Keywords: intercalated, polytitanate potassium, polyethylene, copper-polymer complex of polyacrylamide, friction coefficient, wear resistance, structure, hardness, elemental composition

The article confirms the importance of garrison services in ensuring combat capability and combat readiness. It was stated that the service industry of any military town should become a heuristic model of building service networks for all other populated areas and their social groups.

Keywords: Garrison services, combat readiness, combat capability, Armed forces, architectural and planning organization, defense infrastructure

The aim of this work is to study the degree of protection of underground waters of the Kuibyshev district of Rostov region. The study area represented by the geological deposits of Quaternary (recent sediments) Qh, Neogene and Paleogene systems (Oligocene) P3, Cretaceous (upper division) K2 and the Carboniferous system (upper, middle and lower portions) S1,2,3 based. On the analysis of geological structure of water-bearing rocks in the Kuibyshev district of the Rostov region, which showed an insufficient degree of protection of underground waters against pollution and, as a consequence, insufficient supply of public drinking water, built map of underground waters protection of the Kuibyshev district of the Rostov region

Keywords: groundwater, Geology, classification of water, pollution, drinking water, rural settlement

In this article we accomplished the research of accuracy of determining the coordinates and distances using satellite methods as the distance from the base station according to the materials of the industrial works in the Rostov region.

Keywords: geodetic network, satellite technology, electronic devices

We consider eccentrically compressed rod elements of reinforced concrete structures. Problems are solved for the development of methods for calculating the strength of normal sections in the case of eccentric compression of reinforced concrete elements; calculation of the load-carrying capacity of reinforced concrete structures by the example of columns of varying flexibility for ultimate effort. Analytically, a calculation is made, which makes it possible to determine the strength of reinforced concrete structures.

Keywords: внецентренно сжатые стержни, железобетонные конструкции, прочность, нормальные сечения, колонны различной гибкости, несущая способность, предельные усилия

For a long time in software engineering, there is a problem of a rather significant percentage of software project failures. One of the most frequent causes of such failures is non-optimal allocation of human resources, that is, the allocation of developers to tasks in accordance with their skills and the specifics of the task. Software development requires continuous improvement of skills and the degree of mastery of one skill can positively influence others associated with it. Due to the considerable number of skills there is a need in the expert system that allows you to track the changing skills and implement a near-optimal allocation of human resources. The impossibility of unambiguous evaluation of skills and partial overlapping with each other lead us to the fuzzy sets theory for processing of information about employees, rather than applying classical set theory or probability theory. At the end of the article, the most significant skills of IT specialists are presented.

Keywords: expert systems, software development, project management, human resources allocation, fuzzy sets, uncertainty, probability theory, software developer skills

For basic research flame ionization process is necessary to obtain the true value of the ion current on the probe, taking into account the errors of the measuring circuits. To study the processes of ionization in the combustion cameo widespread ionic current sensors in the presence of the resistive component of the measurement circuit, such as current-limiting elements in the circuits connecting to the ignition coil high-voltage output or measuring shunt. This article describes how to account instrumental errors introduced by such measuring systems, as well as the proposed formula of the transition from the signal values ​​obtained experimentally to the true value of the ion current. The results of the calculation of the reduced value of the ion current to the experimentally obtained signal. The possibility of making instrumental error of up to 40% in amplitude at signal peaks. It is shown that the construction of I-V characteristics of the ionization probe must be considered instrumental error introduced by the resistive components of the measuring circuit.

Keywords: ion current, the electrical conductivity of the flame, the measuring circuit, the instrumental error of measurement, resistive voltage divider, ICE

TiO2 thin films are widely used as a transparent layer n-type conductivity in the perovskite solar cells. Nanocrystalline TiO2 films were deposited on the surface of glass substrates coated with tin oxide with fluorine (FTO) by spin-coating and subsequent laser annealing radiation with a wavelength of 1064 nm. The effect of laser annealing on grain size in the TiO2 film and spin-coating speeds on its thickness. It is found that the grain diameter in the resulting TiO2 films on average 17-64 nm at a power of laser annealing 30-70 W. It was found that the thickness of the TiO2 film is changed in the range of 72-124 nm spin-coating speed. Optimal parameters TiO2 thin film formed by laser annealing can enhance the efficiency of the perovskite solar cell.

Keywords: thin film, TiO2, centrifugation, laser annealing, surface morphology, thickness

Produced synthesis steklomatrits to make white glass-ceramic enamel coatings for steel products with various color shades in the system R2O-RO-B2O3-Al2O3-SiO2-TiO2-P2O5-F- and investigated their spectrophotometric properties. We describe the basic features of different models of determining the color characteristics of the resulting coatings and choose the best for the objective of determining the parameters of color shades of white glass-ceramic enamel coatings for steel products.

Keywords: glass-ceramic enamel coating, protective coating for steel products, corrosion protection, spectrophotometric characteristics, color shades, whiteness, brightness, color models