Proper cost estimation, monitoring and control is vital to the success of construction projects. BIM projects allow you to facilitate, visualize, and demonstrate work results. In the estimate documentation, BIM technologies also allow you to improve the process of working on a project. The article discusses the advantages of using BIM - programs for making estimates on the example of Avtodesk Revit and 5D estimates, indicates the main stages of work in these programs. Fewer errors and less lead time are key factors for integrating these technologies into construction pricing.

Keywords: BIM, estimate, 5D смета, construction, design, pricing

The introduction and application of BIM-technologies has been associated with the transition of the industrial and civil construction industry to a higher level of competitiveness in many countries of the world [1]. The article deals with the process of transition of the work of the project organization from traditional design to BIM modeling. The purpose of this article is to determine the advantages and disadvantages of the implementation of this technology in the activities of the project organization of the construction industry. The authors of this article propose scenarios for the implementation of BIM-technologies in the company's activities and made conclusions about using information technologies in construction organizations of different scale. The features of the implementation of this technology in the design process are considered. The stages of implementation of technologies in the activities of the project organization are analyzed. The result of this study is the conclusions on the subject under study.

Keywords: BIM technologies, information modeling, implementation, competitiveness, 3D-model, construction industry, BIM-standard, software systems, management, BIM-model

When designing digital systems, the stages of design debugging are important and laborious. Debugging is carried out on the manufactured prototype of the digital system. For debugging, in addition to the object being debugged, a set of debugging tests and the ability to organize debug modes on the system prototype are required, which allow, by analyzing intermediate variables, to localize an error in the project when an incorrect reaction of the system prototype to a debug test is detected. The advantages and disadvantages of design debugging on the hardware prototype of the entire digital system are considered, as well as the method for selecting a typical standard core. In the latter case, only prototypes of atypical interface circuits and blocks are made, which are connected to a previously manufactured and debugged standard core. The features of both approaches are analyzed. Classes of the most frequent applications of the considered methods are formulated.

Keywords: digital systems, design debugging, joint hardware and software debugging, project prototyping, debugging process components

The paper is focused on research of an access control system based on the analysis of the thermal radiation of the user's palms using common components, it is shown that the use of multifactor biometric authentication based on the thermal image of the palms and infrared images of the user's veins allows to reduce the errors of the first and second kind during biometric authentication.

Keywords: biometric authentication, thermal palm print, access control system, infrared vein imaging

In the oil industry, autonomous electric power sources containing renewable energy sources are used to power remote consumers with an occasional load, mainly valve assemblies on pipelines. The need for electric energy sources of this type is determined by the need to install valve assemblies at pipeline intersections with water barriers, at intersections with transport arteries, and in a number of other cases. Very often in such places there are no available power lines or substations. In this case, the only alternative is the use of autonomous sources, or the expensive construction of an extended overhead line. In some cases, the developer decides to abandon the overhead line due to its high cost and the need for additional land acquisition. From the point of view of ecology, such a decision in favor of autonomous sources of electric energy also has an additional positive effect. Since the installation of valve assemblies is dictated mainly by environmental considerations, high requirements are placed on the reliability of power supply. Violation of these conditions can lead to hydraulic shocks in the system and possible destruction and breakage of system elements. A wind turbine or solar panels are undoubtedly an independent source of power supply and, when paired with batteries or a diesel generator set, can formally provide high reliability of power supply. On the other hand, there are periods of time when the power of a wind turbine or solar battery is insufficient to supply a given load. As a consequence, the decision on the reliability of power supply should be made on the basis of additional studies of the static and dynamic stability of the entire electrical power generation complex.

Keywords: renewable energy sources, valve assembly on pipelines, ecology, static stability, dynamic stability

A comprehensive automated system for monitoring the formation, transportation, processing and disposal of liquid production and consumption waste in the region is proposed. The system developed by the authors allows, on a unified information basis, to unite carriers of liquid waste, places of their generation, reception and disposal. The article discusses in detail the software for an automated station for receiving and neutralizing liquid waste, as well as a web-shell that allows digitalizing objects of communal infrastructure, on the territory of which activities for processing, neutralizing, and disposing of liquid waste are carried out. The tools and technologies used in the development of the automated system are indicated. In the final part of the work, the software for routing the transportation of liquid waste is presented and the mobile applications of carriers and waste generators for interaction between the system and its client applications are described.

Keywords: automated system, management, liquid waste, production, consumption, disposal

A model that implements a method for assessing the security of a special purpose automated information system is considered in the article. The model takes into account both the intensity of the load on the system and the number of channels as a means of protecting information from DDoS attacks based on the combination of theoretical and empirical approaches to assessing security of special purpose automated information system. The transition from a theoretical model using empirical states and continuous time to a discrete time model is applied to build a new model. The purpose of the work is to develop a model that implements a method for assessing the security of a special purpose automated information system against DDoS attacks based on a theoretical-empirical approach to modeling information protection means against DDoS attacks.The following tasks are solved in the article: analysis of known models that implement the method for assessing the security of special purpose automated information system from DDoS attacks; the model which implements a method for assessing the security of special purpose automated information system based on a theoretical-empirical approach to modeling information protection against DDoS attacks is being developed. The use of the new model makes it possible to apply both empirical values obtained as a result of measurements or modeling, and a theoretical basis for modeling information protection means under the influence of DDoS attacks, taking into account their characteristics, which will be reflected by the income function and the choice of the optimal mode of functioning of the special purpose automated information system in discrete moments in time. When synthesizing the models presented in the article, the lack of the static nature of the assessment of the security of the special purpose automated information system was eliminated, the intensity of computer attacks such as DDoS, which dynamically changes both the parameters evaluating the means of protection and the probability of the system being in critical states, was taken into account.

Keywords: automated system, modeling, security assessment, queuing system, probabilistic assessment, DDoS attack

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 virtual simulator of the car inspector is considered. A distinctive feature of this project is that a visual programming editor was developed specifically for this simulator with a set of necessary functionality for developing other virtual simulators. The editor is designed for the Unity3D engine . The editor's functionality has been scaled and expanded, and new vertexes have been added to the developed system. The animation processing algorithm was used and new classes were created. The resulting vertexes are combined into a chain and their performance is checked.

Keywords: virtual simulator, visual programming editor, car inspector, Unity3D engine, Collider

The article deals with the problem of modeling an automated control system for the process of electroplating metal parts. The analysis of literature sources devoted to electroplating is carried out. The problem and process of electroplating metal parts with the use of reverse is considered. The calculated ratios are given to determine the required current (direct, reverse, increased, reversed), the process time and other internal parameters for the galvanization process. The possibility of performing current switching, setting its value and determining the process time, as well as reversing with the help of automation tools is considered on the example of the model. The model allows for given geometrical parameters galvanization details and preset thickness of the plating to calculate the basic control parameters of galvanization process: electroplating current and duration of the electroplating process. The electroplating process model is sensitive to the shape of the electroplated parts and the composition of the electrolyte, so the automated control system must perform model calculations for each type of parts and electrolyte. Graphs of simulation results in the SimInTech software environment obtained by drawing up a block diagram for a model of an automated control system for the process of galvanizing parts are presented.

Keywords: model, automated system, galvanic coating, geometric parameter, reverse

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

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

A model of passenger traffic movement is proposed that is suitable for identifying hidden patterns in the processes of passenger flow creation. The passenger flow is divided into four components, for which separate passenger flow submodels are developed: quasi-deterministic passenger flow from leaving stops to points of mass attraction of passengers; stochastic hourly passenger flow from each arrival stop to different districts of the city; stochastic flow that models the distribution of passengers between final stops in accordance with the degree of popularity of stops; chaotic distribution of passenger traffic between stops with a small number of daily visits. The results of calculations of the quasi-deterministic passenger traffic submodel from leaving stops to points of mass passenger attraction are estimated.

Keywords: passenger transport, passenger traffic models, passenger behavior patterns, modeling

One of the current tasks of operation of the linear part of the main pipelines is an adequate assessment of the degree of risk of pipe defects. There are several approaches to its solution and a set of calculation methods that take into account the specifics of the operation of main oil and gas pipelines. One of the main performance criteria of pipelines is their durability. The article describes a developed software product that allows you to automate the calculation of the maximum service life of a pipeline with a defect according to the chosen method.

Keywords: main pipelines, reliability, defects, strength, durability, program, calculation method, service life

The subject of research is the development of a service for searching through user files for a given set of keywords with parameters. The available approaches to solving such a problem were studied and the most relevant one was selected. The service searches inside files with text content in order to automate the process of selecting the desired files among the entire set. Its work is based on Porter's algorithm and uses a text stemming approach in order to obtain more accurate results. Searches for the stem of a word, taking morphology into account. Performing a morphological parsing of a word, a base is found common for all its grammatical forms, cutting off suffixes and endings. As a result, the algorithm of the service allows you to search not just for the given keywords, but also takes into account their word forms, and also searches for several sets of keywords at once, each set is analyzed separately. In addition, you can specify ranges of numeric values ​​to search for. A feature of the service is that sets of keywords are searched together in nearby paragraphs within the range of -20 to +20 words from each other, thus taking into account the context of their appearance in the text. The service ranks the found documents according to the quality of their matching search criteria. Files in basic formats are processed: doc, xls, pdf, txt. The service operates on a Linux platform under the control of the Apache web server. Free software tools were used for development.

Keywords: search engine, document analysis, stemming, Porter's algorithm, word forms, morphology, arithmetic mean of percent, web service

The results of the study of the operation of the tractor transmission МТЗ-82 in various gears are given. Simulink simulations are used to automate research calculations.

Keywords: transmission, tractor, simulation, Simulink

The synthesis of phase-locked frequency systems is based on a two-stage optimization procedure. This makes it possible to apply the combined maximum principle to construct a model of the signal phase dynamics under conditions of structural uncertainty of regular effects. The estimation equations in the form of a two-point boundary value problem are obtained using the discrete maximum principle Of L. S. Pontryagin, and a recurrent estimation algorithm is obtained using the invariant immersion method. The efficiency of the synthesized phase-locked frequency system was evaluated on the basis of mathematical modeling in comparison with the traditional one by the criteria of convergence rate and accuracy.

Keywords: synthesis, phase auto-tuning of frequency, the maximum principle of L. S. Pontryagin, the maximum condition of the generalized power function

To share and transfer knowledge, they must be presented in an explicit form that is understandable to both humans and computers. The paper proposes an approach to ontological modeling of WHAT-knowledge, which allows representing knowledge simultaneously in two forms: a) in the form of a visual model (ORM2-diagram), understandable to humans, and b) OWL2-ontology, computer understandable. To convert the knowledge representation from one form to another one, it is proposed to use ontological patterns (mapping rules). Currently, there is no software toolkit that allows a) to build an ORM2-diagram and mapping it in the OWL2-ontology, and b) based on OWL2-ontology, build a visual model in the form of an ORM2-diagram. Therefore, we are developing a Protege-plugin, which should provide a) the creation and editing of WHAT-knowledge by building an ORM2-diagram and mapping it in the OWL2-ontology, and b) visualization of WHAT knowledge in the form of an ORM2-diagram, extracting instances of ontological patterns from the OWL2-ontology. The paper provides a functional and structural description of the plugin; examples of its use are given.

Keywords: WHAT-knowledge, explicit knowledge representation, ontological modeling, ontology, visual model, intermediate model, ontological pattern, ORM2-diagram

.The article discusses methods and means for monitoring weld defects. The types of defects and their impact on the performance of the product are listed. It has been shown that the ultrasonic method is best suited for testing the seams of pipe fittings. On the basis of the analysis of the design and the principle of operation of the ultrasonic flaw detector, a technique for automated control of defects has been developed. The results of control according to the written method are provided. Further ways of automation of the UCD-50 IPS flaw detector and its analogs are described.

Keywords: weld seam, defect, ultrasonic testing, ultrasonic flaw detector, pipeline fittings, non-destructive testing, software

Applied photogrammetry systems, which act as measuring instruments, are often influenced by the external environment and operating conditions, which determine the accuracy of the results. In this regard, the problem of dynamic adjustment of algorithms for these changing conditions arises. To avoid an increase in the likelihood of human error and to reduce the requirements for personnel qualifications, you can resort to the tools of intelligent systems. For these purposes, the development of appropriate components is required, including machine learning tools. This article proposes a method and procedure for machine learning of the photogrammetric algorithm based on the observation of operator actions and a system of production rules.

Keywords: inductive learning, machine learning, photogrammetry, pattern recognition, photogrammetry, forestry, pipe industry, measurement, mobile app, automation

The paper presents a solution to the problem of development a vector control system for an induction motor as part of an electric vehicle power plant, which ensures the maximum efficiency of the motor in various driving modes. A nonlinear mathematical model of an induction motor is used, in a coordinate system rotating synchronously with the magnetic field and oriented along the flux linkage vector of the rotor winding. The principles and methods of synergetic control theory are used to design a vector controller. The regulator provides the set speed of the electric vehicle and minimizes energy losses in changing driving conditions. The theoretical results are confirmed by computer simulation of the power plant of an electric vehicle, consisting of a storage battery, an autonomous voltage inverter, an induction motor and a car body. To simulate the power plant of an electric vehicle with the proposed control algorithms, the Simulink environment was used. The mode of execution of the speed reference of an electric vehicle was simulated in accordance with NEDC. Based on the analysis of the battery condition during the simulation of the electric vehicle's mileage, it can be concluded that the use of an energy-saving regulator is about 40% lower compared to traditional FOC systems.

Keywords: electrovehicle, induction motor, AKAR, IFOC, simulink

The decentralized electric power supply zone occupies about 60-70% of the territory of the Russian Federation. Electric power supply here is carried out using electric generator sets with diesel drive engines. In combination with the difficult logistics of fuel and lubricants materials delivery, this leads to a high prime cost of electricity energy generated. In the capacity of a measures to the costs of electricity reduction, renewable energy sources are used, while maintaining diesel generation as a guaranteed supplier of electricity. Renewable energy is characterized by significant stochastic fluctuations. Based on experimental data, the article shows that the daily load curves of small settlements contain a significant stochastic component, which greatly exceeds the seasonal, daily, and technological components in amplitude. The purpose of this work is to substantiate the structure and parameters of a hybrid energy storage device (HESD) for the synthesis of electrical power generation complexes using renewable energy sources. Spectral analysis using the window Fourier transform is used as a tool. It is established that the energy approach to the choosing of HESD components requires N types of electric energy storage devices, which differ in the ratio: the permissible frequency of the charge-discharge cycle to the cost of the component. As a criterion for choosing the structure and parameter values of a hybrid energy storage device, an estimate is proposed for the levelized cost of electricity (LCOE).

Keywords: hybrid energy storage, electrotechnical complex, renewable energy, daily load curve, spectral analysis, Fourier series

The article discusses the concept of a system for automatic identification and traceability of pipe production at the stage of hot rolling. The main stages of pipe production are presented. A table of selection of technological parameters has been compiled. The structure of the database for the system of automatic identification and traceability of pipe products has been developed.

Keywords: raceability, automatic identification, pipe production, hot rolled products, quality management system

The article demonstrates the problem of controlling an asynchronous motor of an electric vehicle in the acceleration mode and maintaining the speed of the vehicle at the desired value with dynamically changing torque. To solve the problem, the dynamics of the movement of an electric vehicle was described, a vector control system with direct torque control with switching the inverter keys was described, which provides a rapid change in the electromagnetic moment practically without changing the speed of rotation of the motor rotor. On the basis of the given model, the system was synthesized in the Matlab / Simulink package, and the simulation results were obtained. The synthesized control strategies ensure the achievement of the set task of accelerating and stabilizing the speed of an electric vehicle, taking into account the passport characteristics of an electric vehicle, and the stability of a closed system.

Keywords: electric vehicle, control systems, vehicle dynamics, vector control, direct torque control

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