Development of electric energy converters with high energy characteristics is an important scientific and technical task. The solution of this problem is impossible without the use of modern methods of computer modeling. To improve the quality of electricity, filter-compensating devices are used. Develop converters with good energy performance. In this paper, we developed a computer model and circuit of the AC voltage regulator with high-frequency pulse modulation of the output voltage. Methods of digital signal processing and computer simulation are used. In the environment of the software product MATLAB, a program synthesizing the form of voltage at the output of the AC voltage regulator. The program uses a variety of algorithms to control the power keys of the AC voltage regulator. The results of harmonic analysis of the output voltage of the regulator are presented. The study of the AC voltage regulator circuit is performed in the environment of the ORCAD software product. The work of the scheme on the active-inductive load is considered. Electromagnetic processes occurring in the circuit of the AC voltage regulator are investigated. The optimization of the scheme elements is performed. Time diagrams of currents and voltages are obtained. The results of computer simulation can be used in the development of electrical energy converters for electrochemical and electro thermal production.

Keywords: computer simulation; AC voltage regulator; algorithm; high-frequency pulse modulation; time diagrams; transistor key; control system; harmonic composition; damping circuit; thyristor; active-inductive load

The results of the calculation of installations for reducing the level of air pollution from dust and gas emissions from the Bzugu wastewater treatment plant are given. The aerodynamic calculation of pipelines of the system for cleaning dust and gas emissions and the calculation of prevented environmental damage during the implementation of the proposed environmental measures have been performed.

Keywords: dryers, dust and gas emissions, dust, ammonia, turboscrubber, Yatagan gas convector, axonometric scheme

The article considers the conditions for the development of the most rational methods of construction in the cramped conditions of the modern city, in which there is an impossibility of using tower cranes, because of the presence in their working area of already erected buildings or structures, other tower cranes, crossings, roadways and sidewalks. Construction work in cramped conditions cause an increased degree of material, construction, environmental risk and the need to strengthen the safety of people as producing the construction of the object, and the living population nearby.

Keywords: construction, works, factors, safety, territory, risk

This article discusses the use of waste disposal technologies, their technological and environmental-economic assessment. The relevance of this work is determined by the current trend on finding affordable and effective technologies for waste disposal, taking into account their energy potential. A comparative analysis of existing technologies for waste treatment and a feasibility study on the utilization of organic and inorganic carbon-containing waste by the pyrolysis method have been carried out. The authors analyzed the Russian and foreign experience of using waste technologies as alternative energy sources. The energy component of production and consumption wastes is considered. The scheme of the production complex using the pyrolysis technology, focused not only on the processing of waste, but also obtaining the sought-after useful competitive product.

Keywords: ecology, pyrolysis technology, waste recycling, municipal solid waste, MSW, biofuel

This paper discusses the current problems of waste management: sorting and their further processing. The average morphological composition of waste in Russia and in the world is presented. Possible methods of recycling waste components on different morphological composition are considered. A comparative analysis of the existing promising technologies for processing waste used in the Russian Federation, including municipal solid waste by burning, pyrolysis and plasma gasification, from the point of view on economic and environmental efficiency of the process. The technical and economic features of the low- and high-temperature pyrolysis process are given. As economic indicators used are specific capital investments, the cost of utilization, energy consumption and production recoupment. The assessment of environmental efficiency is determined by indicators such as the degree and duration of waste disposal, the generation of waste in the recycling process, and the pollution in the soil, groundwater, and the atmosphere.

Keywords: ecology, pyrolysis, waste treatment, municipal solid waste, solid waste, recycling, waste management

This article describes a software package to solve the problem of optimal placement of information resources-fragments of a distributed database on the nodes of a distributed economic information system by the criterion of the minimum average response time of the system to user requests. The software complex consists of software-implemented mathematical models of distributed systems of processing economic information on the basis of file-server, two-level client-server and three-level client-server architecture, as well as optimization algorithm. The developed software product also allows to make experiments for obtaining and subsequent analysis of the dependence of the reactivity of distributed systems on such integral characteristics as the dimension of the problem, the intensity of the formation of requests by users, the speed of message transmission through communication channels, the speed of reading, the speed of writing and processing in the nodes, which allows to implement a more rational organization of the computational process in the system. The software was implemented in C#, the NetFramework 4.6.1 platform, using the Microsoft Visual Studio 2017 Community development environment.

Keywords: economic information system, distributed information processing system, architecture "file-server", two-level architecture "client-server" three-level architecture "client-server", the global balance equation, a closed exponential queueing network

The results of the calculation of the hazard class of dust and gas emissions from the dryer of sewage sludge from the sewage treatment plant "Bzugu" in Sochi are presented.

Keywords: sewage sludge, dryers, dust and gas emissions, air pollution assessment

The issues of evaluation features of reinforced concrete structures of protective shells of the NP-1000 project of nuclear power plants with a the water-water energetic reacto (VVER-1000) during the construction period are considered. The results of measurements of the strength characteristics of concrete, the thickness of the protective layer of reinforcement and the parameters of cracks made in the framework of the instrumental survey are given. The conducted instrumental survey allowed us to obtain fairly complete and reliable information about the parameters of the elements of the protective pressure-tight shell to perform calculations of the stress-strain state of the shell.

Keywords: protective pressure-tight shell, methods of non-destructive testing, deformations, displacements, cracks, strength of concrete

The issue of improving the cost coverage of the construction company is considered. The authors consider the issues of break-even production. The article deals with three main sources of losses of a construction company. Measures to eliminate them are proposed

Keywords: organization of construction; economy of construction, break-even production

The development of modern electronics has led to the improvement and modernization of natural gas meters. Mechanical devices increasingly began to be replaced by electronic ones, which allow to provide higher accuracy, resolution of the device and have a number of additional features, for example, allow to register events and monitor readings. The task of such devices is to provide completely autonomous operation from the battery element in the period from 5 to 10 years. The battery life is determined by the number of consumers of electricity included in the meter and can be reduced to very small values ​​due to the use of modern electronic components with low power consumption. In addition, it is possible to reduce power consumption by implementing certain algorithms of the device. In this paper, we consider the options for constructing a measuring target, and the algorithms for operating the digital part, which allow us to reduce power consumption.

Keywords: measuring circuits, natural gas meters, energy consumption, measuring target, energy efficiency

The necessity of studying the thermal balance of electrons in the ionospheric sporadic E layer to clarify the conditions of its formation in the framework of the theory of the wind shear. The method of calculation of the altitude profile of electron temperature in the sporadic E layer of the ionosphere. Reported satisfactory agreement between the calculated profile of the temperature of the eiectrons and its experimental profile.

Keywords: ionosphere electron, temperature, sporadic layer, heat balance, the heating rate, wind shear, altitude profile of the temperature probe measurements

The problems of road construction organization are considered. The issues of efficient and competent allocation of resources in the conditions of construction under continuous road maintenance are being studied. The issue of the construction of enclosing structures is raised to isolate sections and bands of high-speed and multi-lane highways

Keywords: organization of construction; the economy of construction, the history of architecture, the history of the construction industry

The results of studies of herbal preparations on their suitability for de-worming sewage of pig-breeding complexes.

Keywords: disinfection, pig complexes, sewage, herbal preparations

The possibility of obtaining quick fixing glue of C0-C2 classes on the basis of gypsum-aluminous expanding cement modified with Portland cement is shown. It was found that the strength of adhesion to the base and the amplitude of deformations during hardening of the quick fixing glue based on the MGGRC essentially depends on the ratio of GC: G: PC in the binder composition, and the direct relationship between the dosage of the PPP in the adhesive composition and the strength of adhesion to the base is not traced. It was revealed that the PPP and VMD positively influence the early strength of adhesion to the base, but at the age of 28 days the influence of the VSD becomes negative. A decrease in the strength of adhesion to the base was found with an increase in the tensile strength of the adhesive for bending. There is no direct relationship between the adhesion strength and the amplitude of glue deformations during hardening.

Keywords: dry building mixes, bond strength, hypoglycous expanded cement, fast fixing glue

The possibility of obtaining fast-hardening levelers for the floor (monolithic screeds) with a compression strength of more than 20 MPa based on gypsum-alumina expanding cement modified by Portland cement (MGRC) is shown. It is established that the kinetics of the compressive strength is mainly determined by the ratio of HZ:G:PTS МGGRC in the composition, the superplasticizer (SP) and esters of methyl cellulose have a negative impact on the buildup of strength in the early period and the value of design strength, as silica fume does not affect the kinetics of strength in the early period and the project age. The ratio of the limits of tensile strength in bending and compression influence internal structural stresses caused by the mismatch between the extension and strength growth in time due to different additive effects of SP and cellulose ethers on the kinetics of formation of hydrocortamate and calcium hydrosilicates.

Keywords: dry mortar, adhesion strength, gipsovoloknistyh expanding cement, glue quick fix