The article is devoted to the development of a complex of mathematical models describing the functioning of a data storage system based on solid-state drives using deduplication technology. The mathematical model of the user application generates a load on the system as a stream of requests, randomly sized according to the Pareto law, and with random time interval between requests. Requests are received at the input of the storage system into the network service model, then to the VDO deduplication system model, then to the software RAID model and, finally, to the solid-state drive model for read/write operation. Due to the nature of SSDs, system performance in read and write modes is modeled separately, taking into account the different speed characteristics of RAID-5, RAID-6 and RAID-10 arrays. The mathematical model of the reliability of each RAID array is based on the Kolmogorov-Chapman system of equations for calculating stationary probabilities describing transitions between states in a discrete Markov chain. The durability of the system is determined through the model for assessing the exhaustion of the recording resource of solid-state drives. The mathematical model for estimating the storage cost includes the costs of equipment, resources and maintenance over the entire operation period of the system. The final result is a mathematical formulation of the problem of data storage system optimal design, which allows selecting the system architecture and parameters that are optimal in terms of a combination of factors – reliability, speed and cost of data storage.

Keywords: mathematical modeling, data storage system, performance, reliability, solid state drives, RAID array, optimization

Cities around the world lack land resources, despite the fact that the housing stock is in a state of extreme deterioration. The solution to this problem becomes such a concept as renovation - the process of updating urban space. This mechanism is currently provided for in the Town Planning Code of the Russian Federation, but for a number of reasons its implementation in practice is limited. Renovation is necessary in the prevailing conditions of the modern world in order to adapt the spaces of former industrial zones for their use in an already new format. The vast majority of industrial companies cease to operate within cities, and their territories turn into neglected neglected development, isolated from the urban social environment. The authors of this article reviewed and analyzed the benefits of implementing renovation programs for residents of the Russian Federation.

Keywords: renovation, eco-construction, depressed territories, modernization of urban areas, development of regions, redevelopment buildings

The article discusses the results of the development of a feasibility study for the provision of services for the export of concrete products in Perm, presents a market analysis in terms of determining the number of residential buildings connected to the water supply system, but not connected to the centralized sewage system, and discusses problems that impede the development of the project The analysis of the actual and planned number of specialized motor vehicle flights was carried out, revenue for the export of concrete products was determined, priority directions were developed eniya activities dedicated utilization of the company

Keywords: household liquid waste, local treatment facilities with passive aeration, local treatment facilities with active aeration

Results of modeling and a pilot study of a low-pass filter with a cut-off frequency of 4 GHz are given. Modeling of the filter was carried out in MicrowaveOffice application program package. The experiment was made on the vector analyzer of RXA chains. Results of modeling and an experiment conform to the imposed requirements, namely: - cut-off frequency is 4 GHz; - losses in bandwidth no more than 3 dB; - an obstacle on the second harmonic of cut-off frequency not less than 60 dB; - wave resistance of an input and exit of 50 Ohms.

Keywords: low-pass filter; cut-off frequency; losses in bandwidth; losses in an obstacle band; modeling; experiment

Currently, special attention is paid to creating a comfortable urban environment, as a result of this there is a need to create projects that contribute to improving the quality of life of the population. In this paper, we consider two subprograms of the Rostov region: "Improvement of public territories of municipalities of the Rostov region" and "Improvement of the courtyards of apartment buildings in the Rostov region", operating under the state program "Formation of a comfortable urban environment." The number of transformed public and house territories from the moment of implementation of these subprograms of the Rostov region is analyzed.

Keywords: comfortable urban environment, state program, land improvement, public areas, transformation

The article deals with the issues of plant protection by electroaerosols of chemicals. Revealed General regularities of penetration electroaerosols jet in the topsoil and deposition of drops of electroaerosol in vegetable elements. The estimation of the depth of penetration of the aerosol jet into the plant layer and the intensity of deposition of the aerosol on the protected plants is given. This article is of interest to a wide range of readers dealing with the issues of electrical aerosol treatments in agriculture.

Keywords: electroaerosol, the jet flow of the electrical aerosol, aerodynamics jet stream, plant protection, plant layer, the charge drops electroaerosol, gravitational and electrostatic precipitation

he article is devoted to the question of selection of aerodynamic parameters of drying in the apparatus of the filtered-fluidized bed of dispersed particles – carbon-black containing wastes materials and granules of sodium salts in solution of modeling problems. The design of the studied gas pressure distribution grid fluidized bed of dispersed materials of the tray kind provides the possibility to efficiently fulfill the drying process at relatively low speeds of the drying agent. It is allowed to reduce the removal of particles of material from the bed and its exhaust into the atmosphere. The average flow rate of gas motion and the number of fluidization for the main stages of the filtered-fluidized bed of the studied materials and aerodynamic parameters (drop pressure losses) are determined. It was found the fluidization number in the range 1.25-1.5 and the bed height was about 0.25 m. The total aerodynamic drop pressure losses of the dispersed materials’ bed and had acceptable meanings within range from 90 to 130 kg / m2. For the recommended range the coefficient was equal 30-45. Data were obtained on the phases of fluidization, the values of the aerodynamic parameters of drying, and the areas of operating conditions that provide a fairly uniform circulation of the material in the layer and reliable operation of the apparatus.

Keywords: modeling, drying, waste, dispersed material, fluidization, bed, velocity, aerodynamics, pollution, atmosphere

The article provides an analysis of the proposed system for protecting confidential information of the organization. The rationale for the need for comprehensive protection is given, since the unidirectional system is not effective enough, leads to early failures and the loss of important confidential information, as well as an adaptive monitoring unit

Keywords: confidential information protection system, protection subsystems, integrated confidential information protection system, probabilistic assessment, adaptive monitoring

Models of monitoring program generation systems are proposed that can significantly reduce the cost of time and other resources for monitoring complex technical objects. Systems are considered at several levels: subsystems and modules, communication links, usage scenarios, physical representations. A technique for adapting system models to subject areas is proposed.

Keywords: complex technical object, monitoring, models of software systems, program generation

This article discusses the issues of optimization of functioning of modern system of state cadastral registration of real estate objects and registration of rights of ownership on them with undertaking a comprehensive cadastral works and rendering of the received information with the help of 3D technology.

Keywords: complex cadastral works, Unified State Register of real Estate (usrn), state cadastral registration, real estate objects, 3D cadastre, real estate objects, public cadastral chamber, real estate, land, systematized information

This article attempts to present the author’s symbolic model of the language, with an emphasis on the practical value of the model for resolving language conflicts. A weighty justification is given for the possibility of a symbolic interpretation of practically any phenomena and objects of reality, which can serve as a methodological key to decoding a single sociocultural code. Such an approach may indicate the discovery of a new vector in understanding the nature of language conflicts. In the model below, you can see many ideas that can provide a rich methodological arsenal of great heuristic power in the field of resolving various kinds of language conflicts

Keywords: symbolic model of language, sociolect, sociocultural code, linguocultural community, language conflicts, language rights, multiculturalism, discrimination, language separatism, language policy

The article discusses the methodology for deploying dual-purpose military infrastructure facilities, including a model for optimizing the placement of the service network in garrisons, where it has already developed, and the question is its reconstruction and expansion. The calculations are made on the example of service in military camps. To optimize the placement of the service network, a criterion is adopted to minimize the service time.

Keywords: garrison service, service network, service center, hierarchy, gravity model of gravity, the theory of central places, commodity circulation, a military town

In modern industry, more common motor choice is a permanent magnet synchronous motor (PMSM). This becomes an urgent issue for the implementation of control scheme for such engines: their mathematical description and the further hardware implementation of algorithms for field programmable gate array or for microcontroller. In this article a mathematical model of PMSM control was created, including a power unit with an inverter and an engine, a FPGA based control circuit with its internal interconnections of digital elements and a feedback sensor. In the future work, this model can be taken as the basis in the hardware implementation of the PMSM control system using CAD, for example, in such as Altera's Quartus II.

Keywords: PMSM, mathematical description, PMSM control scheme, FPGA, Altera Quartus II

When forming in the process of centrifugation an annular section by the method of ""separate"" concreting with the formation of a section of the product at the first stage from the original, including fine-grained concrete mixture, and with the introduction of a coarse aggregate at the second stage into the formed circular section, followed by the final formation of the section and compaction of the concrete mixture by centrifugation, the speed, calculated for the compaction stage, increases, depending on the section zone, the concrete compressive strength from 20% up to 47%, the initial modulus of elasticity from 6 to 19% relative to single-stage centrifugation. The ratio vint / vext of ultrasonic pulse velocities for surface sounding along the inner (vint) and outer (vext) faces of a centrifuged annular section can be considered as a conditional indicator of the uniformity of the concrete structure over the cross section of a centrifuged product. Key words: centrifugation, separate concreting, structure homogeneity, strength and deformation properties, porosity.

Keywords: centrifugation, separate concreting, uniformity of structure, strength and deformation properties, porosity

As a result of the analysis of normative documentation and soil fixing works, a brief historical review of the physicochemical methods of soil fixing was presented. Examples of the application of these methods in Russia and the world are considered.

Keywords: subsidence soils, cementation, soaking, heaps, mudding, subsidence, deformation, pit, soil consolidation