The article deals with mathematical modeling of thin-film materials production, based on the solution of multi-criteria optimization problems by convolution criteria. The method of estimation of coefficients in linear convolution is presented. The mathematical model developed by the authors allows to calculate the maximum profit of the enterprise from the production of thin-film materials, taking into account the cost of their production.

Keywords: thin film, substrate, production, mathematical modeling, multi-criteria optimization, convolution of criteria

The article deals with the processes of separation of thin films of oil liquids on the basis of rotary-belt type devices. The analysis of interaction of liquids and working body is made. The model of formation of oil films and their separation is described. the Studies create prerequisites for the development of engineering methods for calculating the design and operating parameters of the rotor-belt device for the formation of emulsion films and cleaning water surfaces from oil films, which is of great environmental importance.

Keywords: emulsion, film, apparatus, oil stain, viscosity, water surface cleaning

Mathematic modeling of the state of a thin round disk being heat and force affected is performed. In the central part of the disk the homogeneous field of temperatures is formed. Within the deformation theory of a perfect elasto-plastic solid the quadratic plasticity condition is chosen. The relationships between the radius of the disk, the temperature of the central part of the disk and the external pressure which defines the appearance of plastic zones have been established. For different values of external parameters of the model the stress vector hodograph and the plots of stresses and equivalent stresses have been introduced.

Keywords: mathematic modeling, an elastic-plastic solid, the plane-stress state, the deformation theory, thermo-elasto-plasticity, a high-speed rotating disk

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

In this paper, the problem of operational dispatch control in electric power systems is proposed to be solved using a decision support method based on expert systems. This article provides general information about the role of decision support systems in the management of complex technological processes. The architecture of the intelligent decision support system has been designed. The development of a knowledge base for an expert system, which consists of 56 rules, was carried out in the CLIPS environment. A fragment of the created expert system knowledge base is also given. The developed decision support system based on the expert system allows you to increase control over the city’s power supply systems and to develop recommendations for further actions in the event of any system element failure.

Keywords: expert system, knowledge base, CLIPS, management, decision support systems, intelligent management, energy, power supply systems

The complexity of the organization of pneumatic actuator control makes a nonlinear mathematical apparatus that takes into account the thermodynamic processes in the filling and draining of the working cavities of the pneumatic cylinder. The review of existing approaches and methods of pneumatic systems control allows us to draw conclusions about a significant simplification of the mathematical model of the system under study, which leads to a discrepancy between the mathematical model of its technical original and the limited application of the developed control laws.

Keywords: the pneumatic actuator nonlinear mathematical model, synthesis of a synergetic controller, invariant manifold

Based on Dual-Phase-Lag theory a mathematical model of heat transfer in a rod was developed. During the derivation of the differential equation, the modified Fourier law was used. Analysis of the calculation results made it possible to determine the dependence of the optimal rod length on the intensity of heat transfer from its side surface.

Keywords: heat transfer intensification, third kind boundary conditions, temporal nonlocality, Dual-Phase-Lag theory, finite-difference method

This article describes a software complex simulation, which allows you to evaluate the impact of the main integrated indicators of the distributed information processing system on its reactivity, taking into account the properties of self-similarity of traffic, TCP/IP data transfer Protocol, and various architectures. The software package consists of software-implemented mathematical models of distributed information processing systems based on file-server, two-level client-server and three-level client-server architecture, as well as the algorithm of distributed information processing system objects distribution. The platform AnyLogic PLE was used as a software tool.

Keywords: a distributed information processing system architecture "file-server", two-tier architecture "client-server", three-tier architecture "client-server", simulation, self-similar traffic, agent-based modeling, discrete event simulation, system dynamics

Algorithmic trading system based on the MetaTrader4 online trading terminal using the built-in programming language MetaQuotes Language 4 are considered in this article. The mechanical trading system based on the Bollinger Bands indicator are considered. The main blocks of automated trading system have described. The results of system testing on historical data are given. The developed algorithmic trading system allows you to carry out transactions in financial markets automatically, that is, without human participation.

Keywords: automation, programming, financial markets, technical analysis, trading method, trading system, algorithmic trading

In this paper we describe efficient Matlab-based implementation of the finite element solver for the problem of bending of Mindlin plates. This solver is tested on fine meshes consisting of a large number of linear rectangular finite elements. The performance of this solver is so good that even for fine meshes considered the CPU time is small enough.

Keywords: simply-supported plate, Mindlin plate theory, sparse solver, Matlab, finite element method

In this paper, the task of identifying a system for collecting, transmitting and displaying information of a coastal control center for autonomous unmanned underwater vehicles in a Beta-Logarithm decision making system is considered. When assessing the degree of effectiveness of the relevant system of collecting, transmitting and displaying information (CSPA) for a decision maker (DM), the case is considered when the cognitive function does not immediately reach its maximum.

Keywords: the system for the collection of information transfer and display (MEOL), the coastal control center (MCU) autonomous unmanned apparatus (AUV), the decision maker (DM), the cognitive function of DM

The authors of this article considered some aspects related to the history, manufacture and operation of temporary public pneumatic structures in an urban environment. In recent years, pneumatic structures have been used quite often and successfully as multipurpose portable temporary structures for public use. They are an excellent alternative to traditional capital structures made of steel, concrete, bricks. The authors showed design differences and features of air-supported and air-inflatable buildings, described in detail the areas of their application, advantages and disadvantages. This article discusses the characteristics of the material used for coating pneumatic structures, modern innovative trends in the production of multilayer composite membranes. The authors of this article conclude about the possibility of expanding the use of pneumatic structures instead of traditional portable temporary public buildings.

Keywords: air support building, temporary structure, pneumatic structure, membrane, dome, inflatable structure, temporary structure, mobile structure, composite material, long-span structure, multi-purpose space

This article presents experimental data on the effect of inter-window heating of the air gap on the heat-shielding properties of a wooden window. In recent years, Russia has significantly tightened the requirements for the heat-shielding qualities of translucent structures of buildings and structures. However, heat losses through the windows continue to account for a significant portion of the total heat losses through the window structures of buildings. Therefore, in order to reduce heat loss through translucent structures and solutions to the problem of energy saving in buildings, it is necessary to look for ways to increase the resistance to heat transfer of windows. One of the solutions for improving the thermal insulation of window structures and increasing comfort in the premises of residential and public buildings in the winter period is the use of inter-glazing space heating.

Keywords: air gap, design, heating element, heat transfer, building, window construction, temperature, heating, interglass space, heating

At present, there has been an increase in demand in the framework of judicial construction and technical examinations to the question of the practical application of basic forensic techniques in conjunction with new methodological tools. The practice of conducting judicial construction and technical expertise by 2017 has increased in comparison with 2010, which in turn causes problems in pre-trial and judicial proceedings. The trend in the specifics of the use of mixed or non-traditional forms of techniques is designed to solve problems in complex in structure and content of research aimed at establishing the types, volumes and cost of construction work performed, as well as materials and products used in the reconstruction of buildings. The solution of the problem is seen in the constant updating of both the legislative definition and the existing methods in the practice of application by experts and courts.

Keywords: construction, judicial construction and technical expertise, expert, methods, reconstruction of construction objects, research

The composition of fine-grained fiber-reinforced concrete using Portland cement, stone crushing waste, volcanic ash and basalt fiber are considered. It was revealed that with an increase in the ash content in cement, the compressive and flexural strength of fine-grained concrete decreases, and the water absorption increases. Without a significant reduction in the properties of fine concrete, you can enter no more than 10% of volcanic ash.It has been established that with an increase in the content of large fractions of aggregate, the compressive and flexural strength of fine-grained concrete increases as a result of a more compact arrangement of sand grains. The increase in the content of fine sand fractions reduces the strength characteristics of concrete, and increases water absorption. The dependence of the properties of fine-grained fiber-reinforced concrete on the method of mixing the mixture and molding products

Keywords: portland cement, stone-breaking wastes, volcanic ash, basalt fiber, grain size distribution, fine-grained fiber-reinforced concrete, bending strength and compression, method of mixture preparation, method of molding products

Despite numerous advantages, green construction has not yet acquired significant proportions, since modern environmental technologies in construction lead to increased costs, and legislation is also not being adapted to new certification systems. This article outlined the main objectives of "green" construction. Considered the most important principles on which it is based. Analyzed the modern "green" standards for environmental performance of buildings, discussed in detail the methods for determining the rating of a building on specific scales. The advantages and disadvantages of environmental standards were also noted, groups of organizations in the field of “green” construction in Russia were considered.

Keywords: environmental technology, green building, green standards, energy saving, energy efficiency, energy consumption, green building, renewable energy sources

The results of the investigation of the structure of the concrete, modified by the additive expanding, on the combined aggregate, which is a natural crushed stone mixed with crushed concrete, are presented. The study of the properties and regularities of the formation of the concrete structure is simultaneously a method of controlling their production. Regularities and reasons for the change (decrease) in the quality indices of concretes with a combined aggregate are established. Investigation and normalization of the properties of concretes on combined aggregates will allow using them along with traditional structural concrete.

Keywords: recycling, combined filler, contact area, structure, defects, durability

The article is devoted to the analysis of the effectiveness of the use of pre-stressed reinforcement in reinforced concrete structures and the use of steel-fiber-reinforced concrete in modern construction. Examples of materials used

Keywords: reinforced concrete, prestressed reinforcement, strength, high-strength reinforced concrete, steel fiber concrete, fiber, reinforcement

The experience of using blast furnace slag as an artificial foundation of the building foundation is considered. In the process of construction and installation works, the displacement of the columnar foundations was revealed due to changes in the initial properties of the blast-furnace slag. The chemical composition of the slag belonged to the group of inert materials. In fact, after layer-by-layer compaction, the process of disintegration of its initial properties began. The analysis of the conducted studies showed that in the regulatory and scientific literature there are no unambiguous recommendations on the use of this material as the base of buildings and structures. The recommendations that are available relate exclusively to its use in road foundations. From experience it follows: the use of slag in construction is possible, subject to confirmation of its compliance with specific construction conditions.

Keywords: blast-furnace slag, artificial base, layer-by-layer compaction of the soil, hydraulic activity and inertness, modulus of basicity, calcium oxides, manganese oxides, particle size distribution, inert material, chemical decomposition

The possibility of using mobile technologies in the construction industry. Often, mobile technologies are not properly taken into account, although this area has limitless possibilities and sometimes replaces computer ones. Mobility, price, quality, availability, security - not all parameters that can be talked about

Keywords: android, phone, tool, experiment, construction, mobility, simplification, economy, availability, simplicity

Made of a priori ranking factors allowing prediction of thermal protection of objects, represented a formalized scheme of the multifactor experiment, the effects of the determining factors for the thermal protection of the object with a different response function.

Keywords: energy saving, energy efficiency, thermal protection of buildings, multifactorial experiment, ranking factors

Today, the development and research of new designs requires a systematic approach, including design, manufacture of products and construction. Further development of construction follows the path of improving the designs and forms of buildings, which is facilitated by the improvement of the physical and mechanical properties of building materials. The use of high-strength concrete and steel leads to the creation of lighter thin-walled reinforced concrete structures and is fundamentally possible only with perfect technology for the manufacture of elements. Since in the manufacture of reinforced concrete products by a centrifugal method, radially directed filtration channels are formed, it is in them that the manifestation of destruction is most likely. It is aggravated by the fact that the inner layer of such products is more porous than other layers of concrete. The presence of such a structure is determined even if all the requirements for the quality of the raw materials, the preparation of the concrete mix and the use of optimal centrifugation modes are met. The authors in the process of confirming the working hypothesis in this study developed a method of introducing aggregate during centrifugation, on the basis of which prototypes were obtained, which are characterized, compared with the control, improved physicomechanical and structural properties; an increase in the carrying capacity of centrifuged reinforced concrete columns of annular cross section was achieved at the stage of their manufacture by changing the nature of the manufacturing process from one stage to two stages. Testing the hypothesis was carried out by the determined increments of the structural and physical characteristics of the concrete samples. The density of concrete prototypes of centrifuged reinforced concrete columns of annular section of two-stage molding with all three ratios of fractions was higher than that of single-stage concrete. Water absorption at concrete capillary suction of prototypes of centrifuged reinforced concrete columns of annular section of two-stage molding with all three fractions ratios was lower than that of single-stage concrete.

Keywords: centrifuged concrete, reinforced concrete columns, aggregate fractions, two-stage technology, annular section, density, water absorption, structural and physical properties

The use of benign technologies in the reconstruction of a building that is an object of cultural heritage is analyzed on a concrete example. Conclusions on the use of selected technology

Keywords: cultural heritage, cultural heritage object, preservation of cultural heritage objects, monument, sparing technologies, restoration, soil, consolidation, foundation, foundation, deformation, inspection

Formation of a work schedule with the definition of operating and output values in the application of the integrated technology of manufacture of works on the device of walls and floors of monolithic reinforced concrete, which will determine the profitability, devoted to this article.

Keywords: Complex technology, monolithic reinforced concrete, walls, floors, work schedule, cost