The article contains an analysis of the design and calculation process in the 3d system NX Siemens oil and gas facilities. Research methodology - analysis of scientific literature on a given problem, as well as practical domestic experience. Creation of a 3D model of an oil and gas structure, with the possibility of changing the construction parameters at the design stage. Detailed analysis of the model, which allows you to describe in detail the stages of construction of the structure and selection for each stage of construction of specific equipment and materials. Engineering analysis modules are built into the software solution, built-in solvers are designed to calculate the different operation scenarios of the structures being developed, which make it possible to approach the real conditions of operation of the designed structure. The relevance of the use of the NX Siemens system is due to the complexity of the design of oil and gas structures and the influence of all parameters of the materials and technologies used on the performance indicators during the operation of the oil and gas structure. The same software solution allows you to prepare a complete package of design and technological documentation, prepare tasks for processing parts and materials, and ensure quality control during their manufacture.
Keywords: design, calculations, oil and gas facilities, companies, objects,
The contemporary situation associated with the mass introduction of digital technologies into the educational process makes it necessary to rethink the traditional model of teaching of almost all disciplines of higher educational institutions, including foreign languages. This article describes a new educational environment , designed to improve the quality of teaching foreign languages in universities, as well as the development of the conceptual model of professional training of foreign language. The article presents the reasons for the relevance of this direction in higher education at the moment. The main contradictions faced by the modern educational system in the field of teaching foreign languages are also considered. The authors ' model of professional training is meant to overcome these contradictions to some extent by means of a foreign language, taking into consideration the case of Southern Federal University.
Keywords: professional education, system training, language competence, professional competence, digital technologies, smart education, area of responsibility, learning goal, means of forming relevant competencies, educational platform
The object of the research, the result of which is the presented work, is a comprehensive system of spatial data of the railway infrastructure, within which a high-precision system of coordinates of the Russian Railways has been created, and methods definition of normal heights in the Baltic Heights System 1977. The strategy and prospects for the development of high-speed transport highways (VSM) have been described. Methods for determining normal heights at research sites are given.
Keywords: monitoring, buildings, facilities, engineering and geodesic research, laser scanning, GNSS receivers, design, construction, observations, geodesic measurements
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
The article is devoted to solving the issues that arise when choosing the issues of materials for use on the sites of oil fields. The basic concepts of composite materials are revealed. The article presents the prerequisites for the introduction of composite materials for the oil and gas industry. The examples of structures using CM that are used today are presented. The advantages of using a composite material are revealed. An overview of the problems of its implementation in Russia is made. The advantages for construction work when using this material are determined. The minuses of CM, methods of dealing with their flaws are also considered. A detailed analysis of the modern composite materials market takes place.
Keywords: composites, construction and installation works, automation, composite materials, overpasses, fiberglass
The article presents an analysis of project management in terms of the construction industry. The specific features of the management of production activities of construction enterprises have been studied and the effectiveness of this management has been determined. The main problems in the field of project management of construction activities are identified, the main of which is the absence in Russian legislation of a single normative act regulating the development and implementation of a project only in the construction sector. The project management methodology was also considered, using the example of the American methods PMBOK and PRINCE2. The authors analyzed the statistical data of domestic companies involved in the development and management of projects in various industries. The results of the study showed that Russian construction companies are not actively involved in project management compared to organizations in other areas of activity.
Keywords: project management, construction companies, project management methodology, production activities, legislation, monitoring
Solid particles (PM) contaminate the filter surfaces and enter the pores, as well as settle on the surfaces of catalysts and deactivate them. Therefore, this article discusses the filter system and the cleaning system. The paper describes the requirements for what they should contain and provide, what properties and parameters the filter material should have, as well as catalytic converters that contribute to an increased level of cleaning. It is also shown that the system that filters exhaust gases must be resistant to vibrations of up to 150 Hz at an acceleration of up to 4 g. The filter system and cleaning system must be equipped with devices that ensure the regeneration of catalysts at the site of dismantling. The purification system must ensure that the emissions of the following harmful substances are reduced.
Keywords: solid particle, filter system, purification system, catalytic Converter, oxide, external environment, diesel engine
This article presents and investigation the diffused reflection spectra of light from designed green pigments based on chromium(III) oxide, obtained by pyrochemical method by thermal decomposition of ammonium dichromate powder and hydrolytic method from chromium(III) sulfate in water-ammonia solution, as well as zinc oxide doped with cobalt, which are obtained by pyrochemical Sol-gel citrate method, with different levels of cobalt doping, obtained on the basis of silicone with the addition of obtained green pigments based on chromium(III) oxide), some commercial samples of PLA plastics are green in color and from naturally aging green leaves of grasses, trees and shrubs typical of areas with a transitional climate from mild continental to subtropical according to the Köppen classification. A comparative analysis of their diffuse light reflection spectra was performed to determine whether it is possible to partially simulate the diffused light reflection spectra from naturally aging green tree leaves with non-organic pigments or functional materials. Based on the analysis conducted, it is concluded that the studied commercial samples of green PLA plastics are categorically not suitable for simulating the spectra of diffused light reflection from green leaves. However, it is possible to create functional composite materials that can approximately imitate the spectra of diffused light reflection from green leaves of grasses, trees and bushes.
Keywords: spectroscopy, diffuse reflection, functional materials, pyrochemical sol-gel citrate method, hydrolytic methods, chromium (III) oxides, inorganic pigments
Piezoceramics based on the lead zirconate-titanate (PZT) system is the basis of most transducers operating on the piezoelectric effect and are used in various electronic devices operating in the sections of electrical and hydroacoustics, ultrasonic technology, etc. In turn, piezoceramic materials created in the last century have substantially exhausted their potential for use in modern devices, and it is rather difficult to develop new compositions and is not economically efficient. In connection with the above, an urgent task is to find modern ways to increase the parameters of piezoceramic materials.
Keywords: piezoceramics, piezophase, piezomaterial, ceramic technology, microstructure
Currently, the topic of information modeling in the process of designing and operating a construction facility is quite relevant. Therefore, the task of organizations in the construction industry is not only to introduce new technologies, but also to change the existing management processes in the organization. Due to the introduction of BIM-technologies, it is possible to combine the activities of various specialists (and even departments), whose work is performed in various software products. This makes it possible to reduce costs and simplify the process of designing of the future object. The article considers the distribution of responsibilities between the design participants when using CAD-technologies and information modeling technologies. In connection with the need to introduce new employees to the staff, a change in management structure has been proposed in the implementation of information technology. The main tasks of BIM specialists have been defined. The analysis of the project risks during the transition to BIM-technologies has been carried out, measures for their prevention and response methods have been developed.
Keywords: information modeling, BIM-technologies, management structure, BIM-manager, BIM-coordinator, BIM-master, implementation, organizational structure transformation, construction, 3D-model, BIM-standard
The article deals with the representation of spatial data in the framework of a metamodel. The metamodel is supplemented with a subsystem for evaluating data quality. Descriptors for a particular set of spatial data are provided.
Keywords: meta-model, quality of spatial data, set of descriptors evaluation, quality assessment
Market relationships between energy producers and consumers leads to increased obligations for all market players. The problem of efficient distribution of electricity purchased on a wholesale market becomes relevant in the context of development of competition in the retail market. The prognostics of energy consumptions becomes a valuable criterion for planning the further consumers’ demands, reducing generation and transportation costs. In case of inaccurate forecasts, the company will be forced to buy or sell electrical energy at unfavorable price. The usage of multi-factor mathematical models in the prognostics makes it possible to make a highly accurate power consumption forecasting. The author proposes an interpretation of the complex energy consumption system as a multiple linear regression equation that takes the relationship between factors into consideration and allows to single out the influence of any factor on the power output.
Keywords: power consumption, train traction, power consumption forecasting, multiple regression, correlation coefficient, pair correlation, mathematical model, residual analysis, determination coefficient, Fisher's test
The article offers schemes and models that allow using formal parameters and procedures to expand the capabilities of cognitive modeling and increase the level of adequacy of decisions made based on the results of modeling. The paper presents various variants of modeling schemes, which allows the researcher to perform a more versatile analysis of the system, including the analysis of dynamic effects, as well as the selection of parameters of control actions that provide the desired level of system response.
Keywords: dynamic influence, control, simulation, formal cognitive model, formal neurocognitive network of f-euroconcept
The pressure device of a paper machine (BDM) is a rather complex object of regulation with many internal and external connections, requiring modern, intelligent algorithms and control systems. The introduction of such automated process control systems is constrained by high requirements for the qualification of service personnel. Thus, the goal is to obtain adequate models of the pressure device on the basis of a production experiment and simulation, to reduce and validate them, which will allow using traditional regulators and control methods.
Keywords: paper making machine, pressure device, paper mass intake, air cushion pressure, simulation, PID controller
Using finite differences, a transition is made from a second-order differential equation to a difference equation to describe the dynamics of the integral indicator of product quality. Relationships between the coefficients of the difference equation of quality dynamics and the second-order autoregression equation for the integral quality indicator are determined. On the basis of experimental data on the dynamics of the integral quality indicator, the adequacy of its description by a second-order linear differential equation, as well as the related linear difference equation and the autoregression equation, is substantiated. The analysis of the results of the activities of three Russian enterprises to ensure the quality of the trolleybuses they produce using a generalized analogue of the sensitivity coefficient, the ratio of the average value of the control action to its range and the pulsation coefficient. The relationship between the results of the activities of these enterprises and their further life cycle is considered.
Keywords: quality dynamics, finite difference method, autoregression, integral quality indicator
Currently, there is a rapid development of computing systems, including systems that include various types of devices. Such systems are called heterogeneous or heterogeneous. In addition to traditional processors, such a system may include graphics processing units, programmable gate arrays, and other devices. One of the most pronounced problems of such systems is the complexity of distributing the computational load between the nodes of the computing system. This paper describes the types of balancing and methods for distributing computational load in heterogeneous computing systems. An example of load balancing in a real heterogeneous computing system is described.
Keywords: heterogeneous system, heterogeneous system, load balancing, load distribution, computing cluster
The paper considers the characteristics of cloud convection obtained in the course of computational experiments on the basis of a three-dimensional physical and mathematical model of convective clouds, which takes into account in detail the microphysical processes of nucleation, condensation or sublimation of water vapor, coagulation and accretion of precipitation particles, accumulation of volume electric charges, and an increase in the electric field strength. clouds due to charge separation processes occurring during the rapid freezing of large supercooled drops, accretionary growth of cereals and hailstones. Based on the data of numerical modeling using the noted model, the location in the volume of the microstructural parameters of thunderstorm clouds (water content and ice content), space charges, electric field strength, radar reflectivity in the centimeter range, and other parameters at fixed times of cloud evolution was investigated.
Keywords: convective cloud, cloud microstructure, cloud electricity, numerical three-dimensional model, radar reflectance, electrical coagulation
The article presents the results of experiments to study the possibility of using machine vision algorithms for identifying timber, in particular round timber, based on the recognition of the image of annual rings taken as a natural marker. Image recognition is carried out using fingerprint identification algorithms. The results of testing several algorithms for fingerprint identification are presented. The analysis of the effectiveness of the proposed method and its suitability for solving such problems is carried out.
Keywords: annual rings, fingerprints, recognition, identification, image processing, pattern recognition, operational accounting, efficiency
Educational Internet portals are the important means of distance learning. The advantages of searching for educational resources using educational portals in comparison with universal search engines are shown. The main stages of the formation of educational Internet portals are described, methods are considered and the advantages of using attribute search in combination with contextual ones are shown. The importance of the correct formation of the system of classifiers of metadata and keywords, as well as their assignment to educational resources presented on the portal, for the effectiveness of attribute search is pointed out. The stages of the formation of the composition of educational portals, as well as methods of their promotion on the Internet are considered. A comparative analysis of the options for placing the educational resources themselves on portals or links to these resources posted on the websites of universities and other organizations is given.
Keywords: Internet portals, educational resources, Internet search, the formation of portals, the composition of portals, resource attributes
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
This article describes the experience of implementing a system for monitoring the stability of a network infrastructure using the Telegram messenger in a government institution. The functionality of the system and further plans for its development are presented. The tendency towards the spread of the Telegram messenger in the society is described.
Keywords: Telegram, ping, monitoring, inventory, infrastructure, network