The paper provides an analysis of the principles of the multichannel protection system. The analysis showed that in order to solve the problem of ensuring secure communication with an external resource through public networks, it is advisable to use a multi-channel system with different channel capacities, while the main channel and spare channels that are connected to work when the main channel cannot handle all incoming applications with probability of 0.95. This model takes into account that the channels are filled hierarchically, and are freed up as the applications are processed.

Keywords: automated system, modeling, protection subsystem, queuing system, probabilistic assessment

The article studies the subject of human settlements with decentralized power supply, included into a locally isolated power supply complex. The basic integrated measures were determined for settlements power lines daily load curves. The results are presented, for dependency assessment between the integrated measures for daily load curves and the number of the settlement’s inhabitants. The dependency has been proven to be effectively described by a second order equation. For the dependency, the correlation coefficient, the determination coefficient and the average approximation error have been given.

Keywords: Power line load curve, decentralized power supply zone, locally isolated power supply complex, approximation

An experimental study of the combustion of mixtures of hydrocarbon fuels in a water heater was carried out. The dependences of the outlet temperature of the heat carrier on the composition of the fuel in two cases were established: a mixture of methane and propane-butane fuel, a mixture of methane and hydrogen.

Keywords: hydrocarbon fuel, variable composition, heater, reclaiming, energy efficient and environmental combustion

The development of the customs service of the Russian Federation until 2030. The aim of the research is to improve the customs risk management system as a result of the development of a methodology for the automated application of the flow of goods between various customs services. As a result, an algorithm for searching and analyzing goods flows was proposed and its software implementation of mediation in MS Access requests for a database of electronic copies of goods declarations was presented.

Keywords: risk management system, flow of goods, customs risks, foreign economic activity, databases

The work describes the implementation of the cognitive set-theoretic approach proposed earlier for modeling complex systems. The article describes in detail the application of the analytic hierarchy process and the cluster approach to determining the cadastral cost of land and selecting the site according to predetermined criteria on the example of Taganrog. Calculations and visualization of results were carried out using the software products STATISTICA and QGIS

Keywords: cognitive theoretical-multiple approach, the analytic hierarchy process, cluster approach, cadastral cost

The simulation of a multilayer structure in the finite element Ansys complex is considered. The design consists of 10 layers, each of which has certain specific properties. The model is an imitation of the soil base pavement. We consider the simulation in the form of a simplified, flat statement of the problem. The analysis of the oscillations under impact. The wave field of displacements at a given part of the structure is analyzed. Based on a numerical experiment, an approach to estimating the characteristics of a layer is constructed.

Keywords: multi-layer construction, vibration diagnostics, simulation, FEM, Ansys, pulse action, dynamics, fluctuations

The modeling of a hollow core slab in the finite element complex Ansys is considered. The construction of a 3D model is considered. Numerical modeling was carried out under static loading of the floor slab. The influence of material properties on the parameters of the stress state and deflection of the structure is investigated. Based on a numerical experiment, an approach to assessing the characteristics of a structure is constructed.

Keywords: hollow core slab, static analysis, modeling, FEM, Ansys, stress state, deflection

Dynamic norms for random and directed mutations in a genetic algorithm for solving the problem of placing elements in an orthonormal lattice have been developed. The principle of these norms is borrowed from the method of imitation annealing. The probability of using random mutations decreases in accordance with the annealing temperature, and the probability of directional mutations increases from iteration to iteration when approaching the optimum.

Keywords: genetic algorithm, the task of placing the elements, the annealing method, random mutations, directed deterministic mutations

The article presents the non-linear method of analytical information vibration signal processing. This method allows to select spectral components of small amplitude stress concentrators on the backgroud noise. The method is based on digital filtering and demodulation of original vibration signal through its non-linear conversion. Application of smoothing the Hamming window allows to reduce the transition band nonrecursive digital filter and exclude from the sample of information parasitic components. The proposed non-linear analytical information vibration signal processing method lets to select spectral components of surface cracks and sinks most responsible elements of the rotor system and explore its dynamic sustainability.

Keywords: non-linear transformation of analytical information vibration signal, discrete Fourier transform, Hamming window, stress concentrators, dynamic sustainability of rotor system

The article describes the main environmental problems arising in the process of excavation. Based on the analysis of the problems, the ways of their Permissions.

Keywords: ecological safety, environmental protection, construction, earthworks, construction, technological processes, impact of dust, technological processes, influence of dust, constrained conditions

In this paper, the concept of minimal intuitionistic dominating vertex subset of intuitionistic fuzzy graph was considered, and on its basis the notion of a domination set as an invariant of the intuitionistic fuzzy graph was considered. A method and an algorithm for finding all minimal intuitionistic dominating vertex subset and domination set were proposed. This method is the generalization of Maghout’s method for fuzzy graphs. The example of finding the domination set of the intuitionistic fuzzy graph was considered as well. The considered method and algorithm can be used to find other invariants, in particular, externally stable set, intuitionistic base and antibase of the intuitionistic fuzzy graphs.

Keywords: intuitionistic fuzzy set, degree of belonging, degree of non-belonging, fuzzy relation, intuitionistic fuzzy graph, intuitionistic fuzzy graph of the first kind, domination set, algorithm, disjunctive member, adjacency matrix

The paper highlights the importance of the contingency-focused development of organizational and technological solutions for strengthening reinforced concrete columns based on multiple criteria. The main criteria for optimal technology selection are identified, and the algorithm for the performance of works is presented. The complexity of selection unaided by computerprograms is brought to notice.

Keywords: strengthening of columns, multiple criteria, optimal technology selection, structuring, expert reviews, performance algorithms

In article the main stages of creation of control systems of construction processes are analyzed. Features on the basis of modern technologies come to light. The multistage concept of management with a possibility of carrying out research and development in the field of the new systems of the leadership in construction processes and also more exact assessment of the performed works of each functional level is built.

Keywords: multistage system, construction process, class of subsystems, stages of management, control system, functional purpose

The paper presents a theoretical study of spinodal and binodal decomposition of binary solutions. Since there is no thermodynamic barrier in spinodal decomposition, phase decomposition is determined only by diffusion. Thus, at decay many features of phase decomposition can be described by the analytical solution. The equations of spinodal and binodal decomposition in solutions without structural phase transitions are obtained.

Keywords: binary solutions, the spinodal decomposition, a bimodal decay

The computer technology for precious metals examination by method of colorimetry aided with auxiliary chemical reaction is created and investigated. The essentially new practical and methodical novation allowing to shift some orders lower the bottom limit of a measuring range is offered, the theoretical basis for micro- and macroanalysis computer technology is established. Experimentally confirmed, that with the help of new technique it is possible to detect micro probes of silver, gold, platinum and palladium about 10-9 g. It is acceptable to use the proposed technology for quantitative estimation of other substances representing interest in this or that area of expertise.

Keywords: examination, macroanalysis, microanalysis, colorimetry, computer technologies