The article discusses the use of mathematical modeling of the transmission of a car in the Simulink environment. Studies of the influence of individual transmission factors on the functional parameters of the KAMAZ 4308 car have been carried out. Differential equations describing the operation of the transmission are solved in a matrix way, allowing to study the dynamics of the car taking into account the moments of inertia of the engine, transmission and individual wheels of the car.

Keywords: transmission, wheeled vehicle, clutch, differential, gear ratio, simulation, maximum speed

The article proposes a method for assessing the risk of a possible stay of an automated special-purpose information system in a critical state, based on the synthesis of two heterogeneous mathematical models, one of which allows taking into account the intensity of DDOS attacks and the intensity of application processing, based on Markov processes, and the second is one of the forms of a formal description of protection systems, with complete overlap, in which the interaction of the "threat area", "protected area" is considered – areas of resources of an automated information system for special purposes, and "protection systems" – security mechanisms of an automated information system. The developed method makes it possible to simulate the information security tools included in the automated information system for special purposes, under the influence of DDOS attacks, taking into account both the empirical values obtained as a result of measurements or modeling, and the theoretical base of parameters specified by input data. In the synthesis of the two models, the lack of uncertainty of some of the input parameters, taking into account the values based on expert estimates, was eliminated.

Keywords: automated information system, security assessment, queuing system, risk

The paper justifies the relevance and reviews the issues of energy efficient reconstruction of a construction system at various lifecycle stages, underlining that reconstruction needs to be viewed as a separate phase of the property lifecycle. Despite the fact that construction systems are static, all lifecycle stages are dynamic and require complex control. The diagrams are provided to show the building’s lifecycle and the process of stagewise supervision of energy efficient reconstruction by the client.

Keywords: lifecycle, stage, phase, target system, process layout/structure, performance monitoring

The article deals with the actual problematic elements of the organizational structure of enterprises in the construction of industrial buildings and structures. Using the method of optimizing the effectiveness of the existing organizational system, the necessity of introducing organizational and technological modules was revealed. An algorithm for optimizing the organizational structure of an enterprise during the construction of industrial buildings is proposed.

Keywords: optimization of organizational structures, organizational and technological modules, modules-stages, optimization algorithm

The article proposes a special device to transport earth when building an underground part by the «top-down» and «top and down» technique. The developed device is fully electrically powered. The proposed technology enables to completely exclude nonproductive movements of excavating and transportation devices to relocate the earth from the working site to the dumping site onto trucks above ground. The device is adapted to work as part of the production line when realizing the “top-down” and «top and down» technology. To exclude load lifting mechanisms for lifting and dumping of the earth onto the trucks above ground, it is proposed to use two lifting rails with hoisting equipment fixed on a metal frame.

Keywords: “top and down” technology, earth works, excavation works, subsurface part of a building, earth movement, tier of a subsurface part of a building

The restraining setting for customs administration at the border of the Russian Federation is the insufficient equipment and technological equipment of checkpoints. The current uniform requirements for equipment and material and technical equipment of buildings, premises and pass structures do not provide for the introduction of high new technological solutions that have appeared in recent years. Proposals are presented to improve the control system at checkpoints based on advanced technologies of Technet technologies and subtechnologies of end-to-end digital technology "Artificial Intelligence and Neurotechnologies".

Keywords: customs, automation, end-to-end digital technologies, checkpoint

The growth in the number of vehicles on the streets of cities leads to adverse consequences: an increase in congestion, the occurrence of road accidents. In order to take measures for the efficient use of road transport roads in order to avoid unfavorable congestion situations, it is proposed to control traffic flows using a fuzzy regulator along the length of the queue in each of the conflicting directions. The optimization principle is based on minimizing the length of the queue of traffic flows, which allows the most efficient use of the transport bed, avoiding unwanted congestion situations. On the developed model of the intersection, a system with fuzzy regulation of traffic signals is proposed. The average idle time is estimated with a fixed traffic light cycle and with a fuzzy control. With the use of a fuzzy regulator, the average queue at the intersection decreased by 11%.

Keywords: fuzzy regulator, traffic flow, intersection, traffic control system, control algorithm, vehicle intensity

Currently, Russian Railways are characterized by an increase in the weight of trains, an expansion of the fleet of sections with high-speed movement of electric rolling stock. All this leads to a complication of the operating modes of the power supply system, increased liability and possible damage from idle trains. At the same time, monitoring systems of the contact network, as an element of the power supply system that does not have a reserve, are of particular importance. On a significant number of sections of the Russian Railways, the wires and cables of the contact network are subject to ice and frost formations and, as a result, serious operational risks and costs. Minimizing the damage caused by the formation of ice and measures to eliminate it is possible if it is detected at the initial stage. The article provides an assessment of the possibility of using systems based on changes in the weight of wires for the purposes of early detection of ice and frost formations.

Keywords: ice and frost formations, early detection, contact network, carrier cable, contact wire

As a result of the work, an algorithm was developed and a software tool was implemented that allows ensuring the confidentiality of information in the interaction between access subjects. The study of the dependence of the selected parameters of the elliptic curve on the processing time and transmission of the encrypted message has been carried out. Studies have shown that with an increase in the values of the parameters of the elliptic curve, the time for processing confidential information increases due to insufficient system resources.

Keywords: confidential information, information leakage, asymmetric encryption, information reliability, system resources, communication channel

The article discusses the opportunities that arise when using data mining methods in construction. A numerical experiment is carried out to create an algorithm for making design decisions in the production of zero-cycle works, namely, when installing the enclosing structures of the pit edge. Comparison of the data obtained in the Deductor Studio software product with those actually used in the construction of a residential building is performed.

Keywords: construction, earthworks, information technology, decision tree, design decision making, data analysis, machine learning, Data Mining, Deductor.

The existing architecture of the Unified Automated Information System of Customs Authorities (UAIS TO) does not fully comply with modern requirements and the goals and objectives of the FCS of Russia. The problems of desynchronization and multiple duplication of data in numerous automated information subsystems, software complexes, information and reference systems and various software tasks that make up the specialized software of the UAIS TO create prerequisites for the occurrence of emergency situations, which leads to the likelihood of stopping data transmission during customs operations , delays in the release of goods and problems with the functioning of other regulated procedures. Proposals for improving the UAIS TO are presented in terms of technical architecture, in terms of information and software infrastructure and in terms of functional architecture such as: modernization, taking into account the trends of import substitution, increasing the computing power of the data center, improving the telecommunications infrastructure (high channel capacity, uninterrupted, guaranteed data transmission); centralization of information and software tools; implementation of a functional subsystem of a unified analytical storage of information.

Keywords: automated information system, information system architecture, customs authorities, automation

The article deals with the issue of improving the quality of the food chopper. Both domestic and industrial shredders are considered. Engineering solutions are proposed that will reduce the operating costs of the consumer and increase the energy efficiency of the grinding process. These recommendations have been tested in production and are reliable.

Keywords: quality, chopper, energy efficiency, blade, gap, angle, knife, grate, operation, production

This paper reports on the results obtained on the diagnostics of a steam pipeline of a thermal power plant; it analyzes the effect of thermal fatigue on the structure and properties of the 12Kh1MF steel and possible reasons for the emergency destruction of steam pipeline elements before the exhaustion of economic life. Ultrasonic testing and additional heat treatment are proposed to be used for the detection and elimination of structural inhomogeneity in the metal. The applicability of statistical technique to analyzing data on the loading history of a steam pipeline is studied, which enables us to evaluate the damaging effects of loading cycles and to develop a plan of preventive measures, as well as to increase the accuracy of predicting the residual life of steam pipeline elements.

Keywords: metallic structure, diagnostics, degradation, steam pipeline, thermal fatigue, microstructure, mechanical properties, residual life

The possibilities of using the graphic editor AutoCAD in the formation of the readiness of graduates of a technical university for graphic activity are considered. Examples of solving educational problems in the main sections of the discipline "Engineering and Computer Graphics" are given: projection, mechanical engineering and construction drawing.

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

The paper studies the applicability ofthe coercive force (Нс) as a parameter for measuringthe wall thickness ofpipelines,vessels,andother metallic structuresthroughnonmagnetic insulationduring material degradation undercorrosion conditions. A procedure is developedfor remote inspectionof metallic structures atsites of maximum corrosion rateby the coercimetricmethod,withoutbreaking the insulationandstopping the operation ofthe object being tested.The effects of metal thickness, the size ofthe poles of the magnetizer, andthe thickness of non-ferromagneticinsulationon the absoluteand relativevalues of the coercive force are comparatively analyzed. The application of theproposed relative value methodis shown to be able to decrease significantlythe effectof steel composition and structureonthe metal thickness dependence of Нс. The results of measuring the coercive force of differently thick 09G2S steel specimens through non magnetic insulation are presented, as well as the behavior of the relative values of the coercive forceas dependent onmetal and insulation thickness.Foridentical metal thicknesses, the absolute values of the coercive force of different steels may differby a factor of 10 ormore, whereasthe difference in the relative values of Нс with equally decreasing metal thickness does not exceed 15%. The developedtechnique isinsensitivetothe misalignment of the outer and innermetal surfaces,and itenablesthe thickness oflow-alloysteels like 09G2Sto be measured witha relative error of 10%.

Keywords: metallic structure, diagnostics, degradation, corrosion, coercive force, thickness measurement, nonmagnetic insulation