As a solution eliminating the disadvantage of wired home theaters - the multiplicity of signal and feed wires - a method of wireless power transmission is proposed to charge the batteries of the side and rear speakers at a frequency of 2.45 GHz. The energy of the microwave radiation is converted into energy for charging the batteries by means of a special receiving module. The receiver module includes a receiving antenna, a rectifier and a power controller. This article discusses the calculation of the receiving antenna for this system in the structure of a wireless home theater. For the simulation, an antenna of the Yagi-Uda type was chosen, for which the gain and the beamwidth were determined. During the first stage of the simulation, antenna parameters were obtained that were unsatisfactory in the width of the directional pattern. At the second stage, the antenna design was modernized and a re-simulation was performed. Based on the results of this, it can be concluded that the parameters of the receiving antenna improved by 1.5 times, while the gain factor increased by 13%.

Keywords: wireless home theater, wireless microwave power transmission, receiving module, Yagi-Uda antenna, simplified Landtapo dipole, patch antenna, antenna efficiency indicator, radiation pattern, gain factor, reflection coefficient

The article describes a method of processing, which allows to increase the efficiency of milling the end surfaces of the disks.

Keywords: Methods of metal machining, the parameters of cutting layer of metal, the cutting force, cutting modes

The durability of reinforced concrete and metal structures of the underground structure depends on the design decision of the pavement over the construction and waterproofing of the structure as the most vulnerable part of the structure. The article considers the results of the survey of the state of reinforced concrete and metal structures, slabs and waterproofing coating of the musical theater in Rostov - on - don.Non-compliance with technological requirements in the manufacture of waterproofing coating in the underground garage led to corrosion damage to metal structures

Keywords: durability, concrete and reinforced concrete structures, underground construction, waterproofing, inspection, corrosion damage

The question of modernization of structure of the construction company is considered. Possibility of improvement of management of the construction organization is studied. Measures to change structural relations in companies are proposed

Keywords: organization of construction; economy of construction, management of organizations

science is the driving force of the development of the modern state, the successful implementation of its achievements in the production and economic activities can improve everyday life. However, there is a lack of funding for research, low level of interest in new developments and young people in research activities, the lack of integration platforms for interdisciplinary cooperation in the packaging of projects and acceptable conditions for support of small and medium-sized businesses. In order to avoid the loss of scientific potential, it is necessary to take centralized measures on the part of authorities and economic entities

Keywords: scientific activity, applied science, federal budget, regional budget, inter-faculty associations, business

This article discusses the development of measures for the protection of atmospheric air during the construction industry. Particular attention is paid to the development and implementation of MPE projects and their implementation in the construction process. Also an important factor for environmental protection, including atmospheric air is the calculation of the radius of action of the sanitary protection zone of each construction site, depending on the sources of pollution. Particular attention is paid to the allocation of fine dust on the construction site, as well as measures to reduce these emissions. The article presents the results of the implementation of certain technological and organizational measures to reduce the release of PM10 and PM2. 5 fine dust particles on one of the construction sites of Rostov-on-don.

Keywords: protection of atmospheric air, fine dust, organization of construction

The modern problem of building of big cities consists that there is almost no place left for the free building. Therefore it is necessary to carry out so-called "pointed building" when construction is conducted in the constrained conditions. At the same time very often construction sites get to an area of coverage of the subway that causes particular difficulties at construction of constructions in deep ditches.

Keywords: modeling, stress-strain, tunnel, subway, deep ditch, pointed building, ditch protection

High-current semiconductor polycrystalline thermistors of high power of coaxial type have a large mass and consequently, considerable heat capacity and heat resistance. Due to this, the thermophysical and electrophysical processes in them are different in the steady and transient regimes, which is especially important in regimes. which lasts a fraction or a unit of seconds. The main variants of operation of such thermistors in dynamic modes are considered and various characteristics are given.

Keywords: Thermistor, thermal and electrophysical characteristics, electric motors, electrophysical and thermal characteristics of semiconductor thermo-resistors of coaxial type

In this article, the object of the study are the types of recuperators used in air handling units in order to compare their efficiency and payback period. Heat exchanger-a heat exchanger of surface type for the use of waste gas heat, in which the heat exchange between the heat carriers is carried out continuously through the wall separating them. Depending on the temperature of the flows, their rotation speed and rotor speed, we determine the efficiency of the recuperator. Payback of the heat exchanger depends on the climatic parameters of the region, its efficiency, the type of coolant and ventilation mode during the day.

Keywords: heat exchanger, heat exchange, moisture exchange, cold exchange, coolant, plate, rotary, heat pump, efficiency, energy consumption, heater, payback

Annotation: Several ways of utilizing the generated heat, produced by the final gas of boiler unit are analyzed in this article. The first method consists of implementing of heat pump into the process flow diagram of boiler-house plant. The second method encompasses the implementation of axifugal dry box into the process flow diagram. The dry box is implemented into the smoke removal system and also serves as axifugal smoke exhauster. The most widespread method is copious cooling of combustion product gas in steam condensing plants. The copious cooling of smokestack exhaust gases in steam condensing plants allows the full incorporation of sensible heat of smokestack exhaust gases (low heat value). The copious cooling allows the extraction of condensation heat of moistere vapours. The result would be the increasing ratio of utilization of boiler unit by 10-12 percent in optimum performance [ 5,6]. The implementation of steam condensing plant allows to decrease the concentration of nitrogen oxide in smokestack exhaust gases. The same effect can be achieved by implementation of heat pump plant. The efficiency of project implementation of steam condensing plant installation depends to a greater extent on the measure of the amount of hours of operation on peak capacity in recycling mode [6]. Therefore, the way of optimization of boiler flow diagram with the implementation of steam condensing plant, is suggested. This article contains calculations and technical and economic assessment of implementation heat-exchange facility, installed on bypass pipe of opetational block-modulator boiler-house plant with capability of 0,2 Gcal/hr, located in Spassk [4].

Keywords: Boiler-house plant, Steam condensing plant, final gas, heating agent, heat supply system, heat recovery unit, process flow diagram of boiler-house plant, optimization, boiler unit, smokestack exhaust gases, heat producing plant, condensing, heat-exchange

The paper is devoted to the actual problem of ensuring the information security of web-sites. It discusses a method for detecting intentional threats to the confidentiality of information as a result of unauthorized access and is manifested in the form of atypical requests to resources by users. The paper proposes a method based on data mining. Its essence lies in the classification of users' behavior on the basis of information about their actions using an artificial neural network. As a basis for the implementation of the proposed tools, site security audit tools are used as a source of information. The structure of neural network, training methods and practical application are described, and the effectiveness of the proposed methods is evaluated.

Keywords: Data mining, artificial neural network, web-design, machine learning, classification

The problem of the propagation of nonlinear surface waves in a magnetized liquid of infinite depth is solved. The dependence of the frequency of wave oscillations on the magnitude of the magnetic field strength is shown in the graphs. Trajectories of motion of particles of liquid are found. The effect of a magnetic field on the height of a wave is investigated. The results of the study can be used to calculate various technical devices and technological processes.

Keywords: surface waves, magnetizable liquid, magnetic field, wave number, frequency of wave oscillation, magnetic field intensity

When modeling the transport of hot carriers in strong electric fields and using various mathematical relationships describing these processes, usually do not take into account inhomogeneities of impurity doping, which affect the field distribution and the density of the output current. In this paper, we calculated the field distribution along the length of the diode chip. In this case, a one-dimensional model and a phenomenological approach to the description of carrier behavior were used. The results obtained allow one to estimate the influence of the inhomogeneity on the operating modes of the Gunn diode and can be used to create models of higher orders.

Keywords: Gunn diode, numerical modeling, heterogeneity doping physical topological model

A model of corruption based on the example of an examination is psesented as a game in extended form. Both specific values of payoffs and a general case are considered. A probabilistic setup of the problem is also proposed.

Keywords: games in extended form, identification of models, economic corruption

The paper deals with the study of the dynamic characteristics of the coating farm. Due to the changes in the company's technological regulations, it became necessary to install additional ventilation equipment with its output to the roof of the shop. The study showed that to ensure safe operation in the structural scheme of bearing structures it is necessary to organize additional units. Dynamic load on the supporting structures is created by the operation of ventilation equipment. The spectrum of natural oscillation frequencies is determined. The values of these frequencies were compared with the frequency of forced oscillations of the fans. Graphs of the changes in natural frequencies when the fan operating frequency. According to the chart, when the frequency of the driving force coincides with the frequency of natural oscillations, the inertia forces increase sharply, which indicates the passage of the resonance zone. A study of changes in dynamic forces due to rotor imbalance was conducted. The value of the gap arising at wear of bearings at which there will be a destruction of a basic element of a farm was calculated.

Keywords: vibrations, forced vibrations, frequency, resonance, truss