The analysis of the functional purpose of high-rise buildings in Russia and abroad is presented. The dynamics of the growth of construction of ultra-tall buildings for the period 2000-2020 is considered. The trend towards the use of composite materials in the construction of ultra-high buildings is revealed. The dynamics of growth of construction of high-rise buildings in Russia is considered. Revealed changes in the functional purpose of high-rise buildings in Russia on the example of the tallest buildings in the Russian Federation. Changes in the use of construction technologies and materials in the construction of high-rise buildings and their impact on the quality of buildings under construction are presented.

Keywords: high-rise buildings, construction, building materials

A methodology for building an optimal enterprise architecture was developed to improve the efficiency of using information technologies in the digital industry, aimed at providing information support for production systems using modern integrated information technologies. The architecture is decomposed into a number of representations, which are chosen as invariant aspects determined by the analysis of various models of enterprise architecture. We propose to design of an information support subsystem for development of digital industry enterprise promising architecture as a practical tool. Its elements are formed in the field of information technology as a result, and a comprehensive indicator of the effectiveness of a given enterprise architecture is calculated. The modeled subsystem includes a module for storing and managing enterprise architecture elements, a module for storing and managing enterprise architecture selection criteria, a module for creating a promising enterprise architecture based on the implementation of its modeling algorithms, and a module for generating reports. The subsystem will enable the company to create the conditions for efficient creation and exploration of new types of scientific and technical products, timely to market these products, in particular, to ensure the export potential and import substitution and will reduce the duration of the production cycle, improve the effectiveness of in-service process equipment.

Keywords: enterprise architecture, digital industry, optimal enterprise architecture, information support subsystem

Recently, the issues of improving the environmental situation in the urban environment have become more relevant than ever. "Green architecture" gets popularity not only in Russia but over the world as well. The necessity of this type of architecture causes the need to improve air quality and environmental factors of urban conditions. Most often, greening the roof of a building or greening the facades is used for ecologization, so-called the element of wall greening and also greening of vertical surfaces of buildings (phyto facade).

Keywords: green architecture, vertical greening, green wall, waving plants, green screens, phyto facades

The problem of experimental determination of the parameters of the error model of MEMS accelerometers is considered. Possible sources of errors and their nature are shown. When developing a model of errors, the influence of non-orthogonality of the axes, temperature dependences of the conversion coefficient, and displacement of zeros were taken into account. A mathematical model of the MEMS accelerometer errors and an algorithm for the experimental determination of its parameters have been developed. Specific structural schemes of the stands are presented. Their hardware and software implementation is described. Specific features of temperature control in a small-sized heat chamber with a heater and a cooler based on a Peltier element are considered. An example of experimental estimation of the parameters of the error model for one axis of the MPU6050 accelerometer is shown. The developed tools make it possible to start a systematic study and objective comparison of the characteristics of MEMS accelerometers from different companies, as well as to obtain their working error models suitable for use in filtering algorithms in the construction of various systems of inertial navigation and angular stabilization of objects.

Keywords: microelectromechanical systems, MEMS, errors, models, methods, designs, accelerometer, microcircuit, modeling

An auxiliary subsystem of a multi-agent robotic sowing system for agricultural crops, including autonomous robots functioning as part of a group, is considered as an object of research. The aim of the study is to improve the management of adaptability and productivity of agricultural plants. The tasks of the study included the development of the simplest autonomous robot for introducing working fluids into the cenosis and the choice of its parameters. The experimental data were processed by the methods of mathematical statistics. The developed autonomous robot is made of polymer gel and has the properties of a quasi-liquid body. Its parameters are determined, presented experimentally certain mathematical dependences of the interaction of autonomous robots with working fluids, for example, rainwater.

Keywords: seeding, watering, robotic subsystem, autonomous robot, polymer hydrogel, quasi-liquid body

This work analyzes the methods of dismantling and demolition of reinforced concrete structures, namely: manual, mechanical and semi-mechanical method, drilling and blasting method, thermal method. The main advantages and disadvantages of these methods, the possibility and economic feasibility of their use in the interests of the Ministry of Defense of the Russian Federation are also considered. On the basis of the analysis carried out, taking into account the limitations of the use of the methods, a promising electro-hydraulic pulse method for dismantling reinforced concrete structures was proposed and the necessary conditions for its implementation in industrial mastabs in the interests of the Ministry of Defense were indicated.

Keywords: reinforced concrete, reinforced concrete structures, dismantling, demolition, work safety, efficiency, military infrastructure

The results of the development of compositions and technologies for their preparation for use in the structures of marine gravity oil and gas production platforms and underwater oil and gas pipelines are presented. The efficiency of using basalt fiber fibers, plasticizing additive "Sika ViscoCrete 5-800" and soot waste from thermal power plants in the manufacture of fine-grained concrete is proved. As a result of the experiments, the strength characteristics of fiber concrete were determined depending on the amount of superplasticizer and soot waste introduced when using equal-moving mixtures. An increase in the compressive and Flexural strength of samples modified with basalt fiber, superplasticizer and industrial waste is shown, which contributes to an increase in the operational characteristics of oil and gas offshore structures by increasing the parameters of frost resistance and water resistance of structural materials.

Keywords: oil and gas facilities, fiber-reinforced concrete mixture, the superplasticizer basalt fibre, particulate waste strength

The work is devoted to the analysis of existing and applied in practice methods of strengthening building structures, an assessment is given of the choice of the optimal method for strengthening building structures, the main advantages and disadvantages of these methods, the possibility and economic feasibility of their use in the interests of the Ministry of Defense of the Russian Federation are considered.

Keywords: building structures, reinforcement, bearing capacity, technical inspection, efficiency, military infrastructure

Rail transport plays a key role in the transport of passengers and goods. The high demand for effective means of flaw detection of high-speed rails, which is an important component of railway safety, is justified by the constantly growing number of vehicles and their speed [2]. Failure of elements of the railway infrastructure entails huge losses. In this regard, the analysis and forecasting of the state of elements of the railway infrastructure is an urgent task. This article analyzes modern methods for diagnosing the state of a rail track from a mobile bogie or a conventional locomotive. A method for diagnostics of a rail track is proposed, based on registration of vibrations near the rolling surface of rails and processing these signals using neural networks.

Keywords: rail flaw detection, wheel surface, algorithm, IMM, MEMS, control system, inertial sensor, rail defect, contactless measurement

The types of Autonomous stationary energy-cooling systems designed for complete isolation of special objects operating without connection with the atmosphere are Considered. A technical solution is proposed that allows increasing the efficiency of the energy-cooling system, reducing the consumption of process water due to its partial recirculation for cooling the engine of an Autonomous power plant, as well as increasing the period of complete isolation of the object.

Keywords: energy-cooling system, underground facility, military infrastructure, complete isolation mode

The paper discusses modern approaches to the mass valuation of real estate, automated systems for typical buildings assessment, and also provides the development of a method for the continuous assessment of real estate objects, which makes it possible to effectively evaluate groups of real estate objects and infrastructure. This research is aimed at studying the economic component of this process - modeling of a system for assessing the market valuation of real estate in typal development objects. The purpose of the study is to develop a system of continuous assessment (mass valuation) of real estate, taking into account the current methodological support of the process of assessing the market value of real estate, and should contribute to the improvement of the comparative approach to valuation in the framework of the practical activities of appraisers, as well as for state regulation of the real estate market.

Keywords: diversification of management, production diversification, financial and economic purposes of a diversification, technological purposes of ensuring flexibility of production

The theoretical aspects of crystallization of multicomponent solid solutions are discussed. Antimonoid heterosystems in which bismuth is present are considered, a component that largely determines the photoelectric properties of the studied materials. The features of establishing the equilibrium of the liquid and solid phases in the process of crystallization of these systems are considered. The laws of the thermodynamic behavior of heterosystems in the conditions of gradient liquid-phase epitaxy are established. The results of experimental studies on the growth of solid solutions of multicomponent bismuthides on InSb substrates are presented.

Keywords: solid solutions, migrating liquid phase, indium antimonide arsenide, gallium bismuthide, binary pair, recrystallization, quasicrystalline structure

The article describes a model that allows to conduct research and justification of the choice of operating modes of departmental network information objects functioning in distributed data transmission networks in conditions of unauthorized actions aimed at overloading network information objects with incorrectly fragmented message packets. The developed model allows to formulate requirements on improvement of indicators of timely granting of service possibilities to subscribers of departmental data transmission networks and also maintenance of availability of the processed information in the conditions of high intensity of an exchange of message packets with incorrect parameters of fragmentation through monitoring of failures (failures) of defragmentation of message packets and adaptation of parameters of a communication route to change of structure (parameters) of a data transmission network.

Keywords: data network, departmental network information objects, IP datagrams, packet fragmentation

The article presents a method for quantifying the survivability of information technology objects, in relation to the means of software and hardware impact, including those based on assessing the ratio of direct and indirect risks, the ratio of the probability of catastrophic failures for a damaged and intact system. The necessity of increasing the survivability of information technology facilities to ensure security in the global cyberspace is grounded. It is also necessary to note that to ensure the required level of integrated survivability of an information technology object, it is necessary to protect them from software and hardware impacts in the global cyberspace. Information-technical objects with high cyber-defiance are gradually destroyed, while maintaining limited performance (combat capability with respect to military systems). This allows you to take protective measures, thereby reducing the effects of exposure mainly to primary damage from damage to the elements of an information technology object. Information and technical objects with low survivability are destroyed sharply and catastrophically, which is accompanied by significant secondary and cascade destruction, which are disproportionate (disproportionate) initiating software and hardware effects.

Keywords: survivability, information technology objects, the infosphere, cyber defensiveness, cybernetic weapons, software and hardware effects, the technosphere

The article describes the specifics of OOP concepts implementation in the open source projects that contain address book model in comparison to OASIS UBL Party Reference model. The open source software analysis is performed using the formal criteria for evaluating the matching between open source project models and reference model based on quantitative characteristics, conceptual graph transformation and cluster analysis. First, the scope coverage, elaboration factor and structural connectedness were calculated based on model parameters. Second, the domain models were represented as conceptual graphs and they were compared based on semantic equivalence. And third, the model was clustered into four subdomains, and quantitative characteistics were evaluated separately for each cluster. Based on the experimental results of model analysis the authors propose methods to reduce the conceptual mismatch between reference model and project models.

Keywords: OOP, semantic analysis, reference model, OASIS UBL, conceptual graph, cluster analysis