Research in the field of design of buildings and structures has shown that the level of implementation of BIM technologies in different countries is at different levels. The availability of a regulatory framework in this area, financial assistance to construction organizations during the transition to BIM modeling contribute to raising the level. The article also provides a justification for the use of BIM technologies in ventilation systems, taking into account the requirements for these systems.

Keywords: BIM modeling, ventilation systems, 3D design, Autodesk Revit, implementation levels, information modeling, BIM technology, regulatory and technical base

In order for a person with an amputated limb to regain motor activity, should be created fitting lower limb prosthesis and able to movement. The goal of this research is to improve a passive prosthesis depending on microcontroller-unit, transfemoral prosthesis that can reach to the desired of rotational speed for functional use while remaining low-cost. The improvement of this design focuses on creating a new knee joint mechanism using a DC motor pre-existing, the foot, and the socket can get from the previous model. This entails simulating normal limb function while also enhancing the knee prosthesis range motion. the specific requirements that must be realize in this design, such as the knee joint new model ability to flex up to 90 degrees and be strong enough to support the weight of the amputee's body.

Keywords: knee joint, prosthetics, Solid works, ANSYS software, aluminum 6061-T6, stainless Steel 4130

The results of the automated evaluation of the dynamic quality of grinding machines in the process monitoring system are presented. The transfer function of the dynamic system is analytically obtained, a formula for the frequency function is derived from it, on the basis of which models of vibration spectra are constructed, in which frequencies are present that are adequate to the real vibro-acoustic vibrations of the dynamic system of the machine when processing rings. For experimental evaluation of the dynamic quality of machine tools, integral estimates of the low-frequency components of the vibration spectrum are used, characterizing the relationship between the quality of processing bearing rings and the dynamic quality of machine tools.

Keywords: dynamic quality of the grinding machine, vibroacoustic vibrations, bearing rings, processing quality, monitoring system

The study examines the manufacturing process of two types of ankle-foot orthoses (AFO): an adjustable joint and a modified static joint. Polypropylene and steel are used in manufacturing. Vacuum forming is used in the manufacturing process. The ankle orthosis test is performed on a patient with an ankle fracture as a result of a sports injury. The treadmill and F-Socket are used in the second step of the study for gait analysis. In addition, walking cycle results including: ground reaction force (GRF), center of pressure, pressure distribution, stride length, and footprint analysis were used to demonstrate a significant difference between healthy subjects and subjects with pathology who wore AFO. Interference, force, and pressure between feet with AFO contact areas were measured for all subjects.

Keywords: orthosis, ankle-foot orthosis, prosthetics, lower extremities, manufacturing procedure, subject with pathology, subject without pathology

The article discusses the features of identifying novelty in data, as well as general methods for identifying it. Since the absence of noise in the training information is a determining factor for building high-quality classifiers on it in supervised machine learning, such a practically important special case of the search for novelty is considered, when it is determined in separate classes of training data after all outliers have been eliminated in these data. For greater definiteness, when searching for novelty, its geometric interpretation in the space of object feature values.

Keywords: data, classifier, outliers, novelty, novelty detection, geometric approach, statistical criterion

Refrigerating machines are designed to cover peak heat generation in public buildings. At the same time, peak loads are often short-term and most of the time the refrigerating machines operate at 40-60% of their maximum capacity. The article deals with the issues of uneven cold consumption on the example of a sports complex located in Volgograd. When designing the air conditioning system of the games hall, a cooling system with the use of "chiller-fan coils"is used. An effective solution to reduce costs is to include a cold storage battery in the cooling station circuit. The use of a cold storage battery allows you to reduce operating costs.

Keywords: cooling system, air conditioning system, refrigeration machine, cold storage, energy consumption, peak loads, variable energy consumption

This article discusses the importance of timely defect detecting of automated electronic car control systems for prevention of serious failures. Also the first stage of mathematic modeling mechanism is presented, it includes construction models of the dependence of the number of failures by time with various methods of diagnosting the technical condition of the car.

Keywords: diagnosting, modeling, technical service of the car, failure, automated system, electronic control unit, engine

The article presents the systems of automation of the paper-based formation of documents on academic disciplines and practices used by various Russian universities. The systems' main advantages and disadvantages are identified. The analysis made it possible to single out four currently relevant approaches to automating the formation of documents. On the basis of the results of an expert survey of lecturers of the Southern Federal University, an approach was determined that was recommended for its further implementation at the university.

Keywords: university, documents' formation, university document management, software component, paperless documents' formation, university management activities

The construction industry is developing dynamically today. Monolithic reinforced concrete frame is the most common construction of modern buildings. There are the following advantages of monolithic construction technology: the speed of construction; the possibility of building enclosing structures using a combination of various building materials; architectural expressiveness of buildings and others. However, a number of problems cannot be ruled out. The solution of these problems is relevant when accelerating the pace of construction and improving the quality of construction and installation work. One of them is the problem of concrete strength gain in winter production conditions.

Keywords: winter concreting, concrete heating methods, heat treatment parameters, modeling of concrete heating conditions, concrete heating process control

This work is devoted to the synthesis of a Permanent Magnet Synchronous Motor (PMSM) electric drive control system by the method of subordinate control systems. The mathematical model of PMSM is constructed in the d-q coordinate system rotating with the rotor. The structure and parameters of the current controllers and the rotation speed controller are determined. A model of the PMSM subordinate control system in the Matlab-Simulink environment has been developed. It is shown that the quality of the transient process of the current loops id, iq depends only on the value of the uncompensated time constant Tm. The effects of the Tm value on the operation of the rotation speed control system are highlighted. It is established that the optimal choice is the value Tm = 1, which ensures the performance of the PMSM electric drive control system, as well as an acceptable value of the inrush current.

Keywords: PMSM, electric drive, control system synthesis, method of subordinate control systems, current control, speed control, rotation speed control

The use of high-power thermistors as part of the control gear facilitates a smooth start-up of powerful motors with simultaneous temperature control. When calculating the starting processes, there are a number of limitations on which the nature of starting electric motors with the use of thermistor rheostats depends. The calculated relations describing the mathematical model of the influence of the temperature of overheating of semiconductor thermistors on the process of starting motors with a start-up rheostat are presented in the form of graphic dependences. As a result of modeling the layout of thermistor rheostats, it was determined that it is necessary to pay special attention to the material heating temperature.

Keywords: semiconductor thermistor, starting rheostat, boundary conditions, heating, specific heat, induction motor, starting current, overheating temperature

Most of the electric motors used in industry are squirrel cage induction motors. In modern industries, various types of starting and controlling asynchronous motors are used, the choice of the starting mode determines the necessary means of automating the electric drive, which directly affects the functionality and, accordingly, the final cost of the project. Direct starting is the most common way to start an electric motor. The main advantage of direct start is the maximum cheapness of the control scheme implementation. The disadvantage of direct starting is high starting currents, exceeding the rated ones by 3-8 times, which leads to increased wear of the windings and causes a reduction in the service life of the electric motor. A high initial starting torque is accompanied by a significant impulse, which places a significant load on both the mechanisms of the electric drive itself and the units of technological equipment. Star-delta starting is used to reduce inrush currents. It allows you to make a soft start with a star circuit, and during operation, a triangle is turned on, providing the maximum power of the unit. In contrast to the starting modes discussed earlier, the soft starter stabilizes the starting characteristics, providing a gradual increase in power and stable operation of the motor, which allows to extend the service life of the electric motor and technological equipment. The use of frequency converters allows you to optimize production, reduce energy consumption, and increase the service life of equipment. The inverter also protects the electric motor in the event of a short circuit, deviations from the nominal mains voltage and controls the operating temperature of the electric motor, preventing it from overheating. Having considered the features, as well as the advantages and disadvantages of starting modes of asynchronous electric motors, it is possible to determine what equipment is needed to implement a specific task of an automated electric drive.

Keywords: automated electric drive, asynchronous electric motor, starting mode, soft starter, frequency converter, automatic control

The development of a methodology for the formation of an estimate of a construction object on the basis of its information model is considered, taking into account the state of development of software systems for BIM modeling and the peculiarities of regulatory regulation of the construction of construction projects in Russia. The factors that limit the possibility of drawing up estimate documentation for the information model have been identified. Taking into account the identified limitations, a set of operations necessary for the formation of an estimate for a construction object based on its information model is presented.

Keywords: BIM, 5D BIM-model, estimate documentation, civil and industrial construction

The construction industry is considered to be one of the most unsafe industries, and as a result, safety in the construction industry is considered a very important factor. To reduce the number of accidents and monitor workers at a construction site, the article suggests integrating new tracking and communication technologies. The authors analyze the existing similar technological solutions, identify their advantages and disadvantages. A method for organizing monitoring of workers at a construction site using mobile devices is proposed, as well as the architecture of a software and hardware complex. The developed method is a smart system for a mobile device. This solution allows you to monitor the location of workers using a GPS tracker and a built-in accelerometer, and, if necessary, notify them of a possible danger.

Keywords: construction site, accidents, safety in construction, employee monitoring, mobile application, geolocation

The issues of ensuring the reliable operation of bearing production on the basis of the organization of the process monitoring system (SMTP), based on the introduction of effective automated control and diagnostics of technological equipment, including processing modes and technical condition, active control of product quality in the manufacturing process, output characteristics of rings processed by the eddy current method, as well as making decisions on timely maintenance of equipment. The results of the inspection are stored in a report file generated in the eddy current device computer: information about each checked part is stored: the time of inspection, the type of part, the surface to be monitored, the number of the machine on which the part was processed. The results of eddy current control serve as the basis for monitoring the dynamic characteristics of the equipment by vibroacoustic vibrations. Based on the results of the control within the framework of the SMTP, a decision is made on the quality management of processing. The introduction of SMTP provided a significant reduction in ring defects in terms of grinding quality up to 2-3 % and increased operational reliability of bearings.

Keywords: grinding process monitoring, bearing rings, dynamic machine quality, active control, eddy current control, ring quality

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

To evaluate the efficiency of the system of forced cooling of disc-pad brake mechanisms, the temperature on the working surfaces of the brake disc is proposed as a criterion. The parameters of influence on the forced cooling system include the pressure at the inlet of the ventilation unit, the angle of attack of the air flow, the number of air supply sources and the geometry of the ventilation unit. As a result of multifactorial experiments, the regression equations of temperature on the working surfaces of the brake disc were obtained from the above-mentioned influence parameters. The obtained data can be used in two directions: designing systems for forced cooling of brake mechanisms and controlling the thermal load of the brake disc.

Keywords: disc-block type brake mechanism, forced cooling system, temperature of working surfaces, pressure at the inlet of the ventilation unit, angle of attack of the air flow, geometry of the ventilation unit, regression equations

This paper considers non-traditional methods for creating an optimal technological process for the manufacture of heavy energy objects using the principles of wildlife. A comparative analysis is carried out between the principle of operation of the developed version of a reloading machine for fuel cells in a nuclear reactor, various options for load-gripping and suspended manipulating devices, and analog processes borrowed from nature. The scheme of manufacturing a heavy energy object is analyzed when considering the chain "mechanics - spider, ant - hoisting-and-transport machines - engineering psychology".

Keywords: heavy energy objects, mechanics, wildlife, invention

The work is devoted to some questions of prosthetics of human limbs. A prototype of a prosthesis control system based on electromyography is suggested, which is not inferior to existing analogues, but significantly benefits in its cost.

Keywords: bionic prosthesis, electromyography, EMG sensor, amplifier

The possibility of using neural networks to classify the states of complex objects is considered. A software implementation of a neural network classifier is made and the results are compared with a selection algorithm based on K-nearest neighbors.

Keywords: classification, neural networks, decision making, case

Noise in training samples, the main part of which is made up of outliers and novelty, is considered. The analysis of the main causes of outliers in training samples is given. The essence of the main existing approaches to determining outliers in training samples is considered. Based on the use of the nearest neighbors method, a modified method for comparing generalized distances from objects to classes is proposed. For the main types of metrics used in the spaces of feature values, the justified values ​​of the safety factors used in this technique are found. For a programmatic assessment of the quality of the training sample and a reasonable choice of the method for correcting outliers, it is proposed to use the permissible fractions of corrected and removed outliers in it. An algorithm for analyzing the presence of outliers in a set of training examples is given. An estimate of the complexity of the algorithm by the length of the input of the problem is given. An algorithm for evaluating and correcting training samples has been developed.

Keywords: classification problem, classifier, decision function, training sample, precedent, erroneous data, analysis, correction, artificial intelligence, compactness hypothesis, novelty, learningg

The paper discusses improvement of approach to voice recognition for editing source code, using Google Cloud Speech. The improved approach combines neural networks with sound editing, editing distances, and replacement tables. The architecture for the recognition of Python language expressions is suggested. The results of the analysis of the testing approach on prototype program, that combines editing code on GitHub with Telegram, is discussed, The paper discusses advantages and disadvantages of the improved approach.

Keywords: voice recognition, neural networks, machine learning, source code analysis, formal languages, editing distances

This paper demonstrates an approach to data visualization using manipulations with json data. Based on the Dimensional Charting library, you can render graphical information taking into account the processing of big data, since interactive data visualization in the web interface is widely used in analyzing user traffic on the Internet. Dimensional Charting is the link between the two built-in libraries. The Crossfilter library is responsible for sorting, filtering big data, and d3.js it is necessary for drawing graphic material on html pages. Thanks to new technologies, you can process big data without using third-party programming languages.

Keywords: data processing, data visualization, filtering, sorting dimensional charting, javascript, json, crossfilter, data-driven documents

This study shows how it is possible to reduce the cost of transporting bales of biomass from the place of their production – the field, to the place of storage and processing on farms. The developed model of increasing the number of small warehouses allows farmers to transport round bales to storage locations in the most efficient way. The calculation was carried out in a field with an area of 16 hectares, the optimal distance for transporting bales is 0.8 km.

Keywords: straw, bale, biomass bale crop parts, bale logistics, bale transport from the field, delivery efficiency, transportation costs, bale storage locations, front loader, self-loading trailer

The goal of document is to develop a system which will allow user to control connected home appliances remotely using an android app. The advantages of this project are safety of using and saving human’s and electric energy. This system is separated to software and hardware module. MCU is the central device in this project, by which we can control: fan, a/c , lights and e.t.c , depending on we connect. Discussing a lot about safety of using home automation system by internet of things. Making conclusions by example Fibaro house center and his weakness of safety information. Review an app on Android and create a simple script on Lua ,so that when accessing the module via HTTP, information is displayed from it.

Keywords: Home automation system, Internet of things, smart home, cybersafety, android, server cloud, Lua script, Web-server,serial number and key, HTTP