Mechanical engineering and machine science
The current economic situation in the global fuel market leads to the fact that there is a rise in the cost of operating vehicles. All this makes the owners of such vehicles pay close attention to their optimal operation mode, which primarily depends on competent diagnosis of its components. Saving fuel-operating resources of a modern car directly depends on optimally adjusted parameters of operation of all components and assemblies of a car. The purpose of this work was to increase the efficiency of the process of technical operation of vehicles through the use of the method of remote diagnostics on the example of LLC POGA-1. The practice of using diagnostic tools demonstrates the possibilities of reducing operating costs. This is achieved due to an increase in the resources actually used, a decrease in the number of repairs and the saving of spare parts costs. Over the past years in the Russian Federation has been actively developing the field of freight. The largest share falls on road transport (67.7%). A significant proportion of the country's truck fleet is used as a commercial vehicle, which significantly complicates the procedure for timely diagnosis. Thus, in the event of a malfunction or error in the operation of a motor vehicle, the vehicle can be on a flight and there will not be a specialized service station within range of technical diagnostics of the truck to identify the causes of errors and / or malfunctions. The established problem finds its solution in the application of the method of remote diagnosis of commercial vehicles straight from the TO center, which is equipped with the necessary complex for diagnosing.
The article deals with the task of lifting a weight by a person using an exoskeleton. It is proposed to consider lifting in the form of three successive stages. A mathematical model of the exoskeleton, describing movement in various modes of movement, has been developed. The inverse task of kinematics was solved, which allows finding the rotation angles of the exoskeleton links at the preparatory stage. The method for determining the driving moments at the stages of lifting the load is proposed.
Currently, almost all automotive vehicles use parts made of aluminum alloys. The world auto industry consumes from 4.5 to 5.0 million tons of aluminum alloys per year, which is about 20% of world aluminum production. Low density, high mechanical strength, corrosion resistance, good machinability and a number of other properties caused the use of aluminum alloys for the manufacture of critical parts of the internal combustion engine, as well as the use of aluminum powder materials in restoring defective automotive parts. The purpose of this work was to study the corrosion resistance of coatings obtained by the method of gas dynamic spraying using standard and electroerosive powder materials. Currently, one of the most promising methods for applying coatings is gas dynamic spraying. One of the problems of using the technology of gas-dynamic spraying is the quality of the used powder materials. One of the most promising and industrially not used are powder materials (PM), obtained from conductive waste by electroerosion dispersion. However, these materials have not been used to date in the technology of restoring defective parts of cars by gas-dynamic spraying, including the cylinder heads. Testing the corrosion resistance of gas-dynamic coatings was carried out according to the method of accelerated testing using the multichannel potentiostat-galvanostat “Elins P-20X8”. Potentsiostat - galvanostat R- 20X8 is entered in the State Register of Measuring Instruments of the Russian Federation (State Register of SI of the Russian Federation) under registration number 70702-18. The method of calibration MP 206.1-001-2018, the verification interval is 2 years. The device is also certified according to the GOST R certification system. Certificate of Conformity No. ROSS RU.AD44.N04368. As a result of the study of the corrosion resistance of coatings, it was experimentally established that in coatings obtained using standard PM, the electrolyte penetrates the coating, respectively, the coating obtained using EDM PM is more resistant to corrosion and less susceptible to flaking.
Unsteady processes in the working fluid lead to the receipt of both hydraulic impulses and hydraulic shocks, the energy of which is currently used in a number of devices and machines. In hydraulic vibratory presses, hydraulic hammers, hammers and hydraulic perforators, the creation of significant pulses is necessary to ensure their basic functions. Hydraulic impact is used in hydrotarans for water lifting and rock destruction, drilling units for drilling wells with the help of a longitudinal shock impulse, hydroimpulse plants for cleaning surplus materials (liquidations), causing irregularities in the shape and precision of the parts. Devices - multipliers for obtaining ultra-high pressures of the working fluid, providing its impulse delivery, are provided, and the characteristics of the pulses and the periods of their action are adjustable. In the construction of hydroimpulse devices, a high-speed pulse jet is created, which leads to an increase in the efficiency and productivity of the units. Analytical studies have been carried out to determine some of the main geometric and structural relationships, the dynamic parameters of devices that use the hydrodynamic effect to create powerful hydroimpuls. Mathetical calculations, which follow from the formula of Zhukovsky N.E. for the origin of the hydraulic shock and the Bernoulli equation for the unsteady motion of the working fluid, made it possible to draw a number of practical conclusions and outline the direction of research that needed to be continued, including the use of computer technology because of the complexity of the dependencies obtained and the impossibility of transforming them to a fairly simple form. The research methodology and the calculation example are presented. The ways of improving devices are outlined. It is necessary to set up experiments to evaluate the theoretical results and the behavior of the liquid under conditions of its ultrahigh pressures.
Computer science, computer engineering and IT managment
The aim of this work is to develop approaches to automate the process of installing sensors for monitoring "smart home". The article briefly describes the emergence of the smart home system and the further spread of this system in Russia. “Smart Home” is a home control system that provides automatic and well-coordinated operation of a whole complex of systems, in particular, lighting control, which requires the use of correct placement of sensors. Such a system can provide benefits for people with disabilities. The sensor layout will optimize energy consumption. The paper gives a brief description of the classic sensor sets for a smart home. A classic set for a smart home are: control center, cameras, modules in the socket, wall switches, control modules and various sensors. The classification of sensors according to various characteristics and the method of connection is given. The article focuses on the placement of motion and light sensors, which are often the basis of a “smart home” and are used to control various devices. This paper describes the classic smart home circuit and lists its main components. An algorithm is proposed for determining the need for using standard models of motion and illumination sensors and their quantitative ratio from the room analysis, namely: the type of room (residential, non-residential), the size of the room, the presence of window and door openings. The presented algorithm contains the following steps: preliminary analysis of the room in which it is necessary to install motion and light sensors, take into account the characteristics of the sensors. Brief results of testing are given. This work shows that it is quite possible to arrange a “smart home” complex in an individual residential structure.
This work is devoted to the currently relevant issues - optimization of warehousing. Cargo receiving and dispatch processes held in a medium-sized warehouse are being considered in this work in detail. Based on the results of preliminary analysis, several indicators were selected, necessary for the usage of intellectual analysis tools in order to predict the required number of employees at the warehouse entrances. In accordance with the purpose set, models for predicting the required number of employees at the entrances were created to ensure the working process in a way, which corresponds to the optimal value of the indicator “workload of the entrance”. Various methods of machine learning, such as decision tree, k-nearest neighbors regression, random forest, and feedforward neural network are considered in the context of the problem, mentioned above. Each of the models was trained with different values of the model's hyperparameters, which were selected in both manual heuristic-based mode and using specialized software tools for grid search (GridSearchCV) from the scikit-learn library, designed to find the optimal values of the hyperparameters. Using the automated search for hyperparameters when training models yields to a smaller mean-square error in comparison with manual selection of hyperparameters. According to the analysis results of the model prediction quality, it was found that the predicted number of employees closely corresponds to the real situation in comparison with the planned values being used by the company. Based on the obtained results, several recommendations were made to assess the growth of the economic efficiency of the enterprise.
Background. The object of the research is the functional architecture of distributed computing systems with a variable (reconfigurable) structure characteristic of hybrid systems of cloud-network (grid) type. Despite the fact that Petri nets have long been studied both theoretically and practically, the methods of their interpretation continue to develop intensively. At present, the problem of embedding Petri nets in the architecture of distributed network applications used to implement global computing in modern mixed cloud, grid and cluster systems has not been sufficiently studied. It is shown that in modern studies, Petri nets are used mainly in the simulation of discrete systems and processes, and not as the basis for formalized specifications in the development of distributed applications. In this regard, the interpretation of Petri nets in applications to the functional architecture of distributed computing systems with a variable structure based on the network software of the intermediate class (middleware class) is relevant. The aim of the work was the integration of graphical representations of conceptual graphs, semantic networks, scenarios and Petri nets, which made it possible to create effective tools with graphical support for designing a functional architecture of distributed computing systems with a variable structure and, in particular, a cloudy architecture of the NCaaSoD type - Network Computing as a Service on Demand (network computing as a cloud service at the request of the user).
Materials and methods. The conceptual models of distributed processes that are a graphical interpretation of the first-order predicate calculus are used. Conceptual graphs for distributed Petri nets of mixed type have been proposed, which allow describing computation processes in global computational networks with a view to their subsequent implementation.
Results. Based on the integration of graphical representations of conceptual graphs, semantic networks, scenarios and Petri nets, conceptual representations of distributed reconfigurable Petri nets are proposed, allowing them to be directly integrated into the architecture of the computer network.
Results. New conceptual-behavioral models based on conceptual graphs of distributed Petri nets have been proposed to determine the system and functional architectures of distributed computing systems with a variable structure provided to the user as a hybrid cloud-based network service; these models are distinguished by the possibility of operational reconfiguration and immediate execution.
Conclusion. A method was proposed and formalized for embedding conceptual Petri nets into the architecture of cloud-networked computer systems such as NCaaSoD — network (cloud) computing as a service organized at the user's request. The rules for obtaining relations of connectivity between the positions and transitions of the Petri net, placed on the nodes of the physical computer network, are proposed.
Consider the option of building the last miles to telecom operators, in accordance with the requirements for the construction of the last miles of control centers in the power industry. A variant is proposed for constructing a typical network node of the last miles of the control center, taking into account all the necessary interfaces for the transmission of dispatch telephone communication channels, telemetry information transmission channels, as well as service communication channels and information exchange between electric power entities and dispatch centers. A variant of the construction and topology of the last miles of the control center, methods of reservation of channels to access nodes are described. All types and types of interfaces that are necessary to use for the organization of dispatch communication channels and the transmission of telemetric information in the dispatch centers of the regional level have been determined. The use of various types of interfaces for service purposes is described in detail. Separate types of interfaces are used for voice transmission and for dispatch communication channels with objects. The variants of using analog interfaces for transmitting telemetry information via corresponding communication channels, which are used for cent equipment with analog outputs, are described. There are several types of redundancy of communication channels to ensure uninterrupted operation of the control center and to exclude the possibility of disabling the main and backup channels at the same time when working with a particular object. The redundancy of the hardware is carried out by installing additional cards in the equipment of the nodes in the cold reserve. Power redundancy is carried out due to the presence of at least two power supply units of the equipment for connection from two different sources of the uninterruptible power supply system. There is a reserve for the optical fibers of the last miles to the access nodes, which in turn allows you to change the transport transmission line in case of failure of the current one.
At present, multiprocessor systems of a critical nature are widely used. Such systems are used for tracking, aiming, observing, etc. Such tasks, as a rule, require maximizing productivity and reducing the time to solve a problem. For these purposes, the initial selection of non-dependent linear, conditional and cyclic sections of sequential programs is used [1]. This is done to release fragments of programs that can be assigned to execution on processors in such a way that during execution they exchange data with neighboring processors as little as possible. Due to this, it is possible to partially improve the performance of a multiprocessor computing system, together with a decrease in the overall execution time of the entire task as a whole. For systems of the considered nature of the processor of the entire system, it is desirable to assign program fragments so that they are constantly loaded throughout the solution of the entire problem. This is another way to improve the performance of a multiprocessor system. It is obvious that the use of software for this purpose is not real due to the criticality of the time parameter. Therefore, it is relevant to use methods and corresponding hardwareoriented algorithms for scheduling processor loads, which is the subject of research in this article. The article shows the relevance of the constant loading of processors of multiprocessor systems with a high availability factor. The necessity of drawing up a plan for loading processors to support this coefficient is substantiated. An appropriate method and algorithm for multiprocessor systems for critical purposes (tracking systems, surveillance, aiming, etc.) are proposed.
Introduction. The use of information and communication technologies allows the teacher to update the content of training. The success of the educational process is largely determined by the ICT competence and ICT literacy of the teacher. Data mining based on artificial neural networks can be used as one of the elements of information and communication technologies. The main direction of application of tests is to measure the level of knowledge of students. A large amount of accumulated test results with proper processing can provide the teacher with additional (hidden) data. The use of an artificial neural network for the analysis of test results makes it possible to expand the direction of the tests. Methods. The theoretical basis of the study is based on a complex of scientific statements of domestic and foreign scientists in the field of education and artificial intelligence. Practical research methods are based on an experiment in creating a test in computer science, testing students and accumulating data, as well as their processing simulated artificial neural network. Results. The article describes the process of analyzing the results of research using the SPSS STATISTICA 20 programs. The search for hidden patterns of the test was carried out, the reliability of the results obtained was verified. Discussion. There was suggested the possibility of further application of the results obtained in the educational process. The results obtained can be used to search for and correct difficult or easy test items, and to replace failed test tasks. The teacher has the opportunity to redistribute the time resource for the study of difficult digestible topics, due to easily digestible. The idea of an integrated approach to the use of artificial neural networks in education is proposed.
In work the algorithm of restoration of the images damaged as a result of influence of noise of various nature is considered. The advantages and disadvantages of the existing approaches, as well as the prospects of using artificial neural networks, are noted. A double-layer neural network is used as an image restoration tool, and it is assumed that the location of the damaged pixels is known. A neuron is represented as a 3x3 array, where each element of the array has a pixel color value that corresponds to the value of that color in the palette. The neural network is trained on intact images, while the color difference of pixels acts as a learning criterion. For a more accurate restoration, it is ecommended at the training stage to select images similar in color to damaged ones. At the recovery stage, neurons (3x3) are formed around the damaged pixels, so that the damaged pixel is located in the middle of the neuron data array. The damaged pixel is assigned a neuron value depending on the average value of the weights matrix. An algorithm for the restoration of pixels, as well as its software implementation. The simulation was carried out in the RGB palette separately for each channel. To assess the quality of the recovery were selected groups of images with varying degrees of damage. Unlike existing solutions, the algorithm has the simplicity of implementation. The research results show that regardless of the degree of damage (within 50%), about 70% of damaged pixels are restored. Further studies suggest a modification of the algorithm to restore images with enlarged areas of damage, as well as adapting it to restore three-dimensional images.
In work the algorithm of restoration of the images damaged as a result of influence of noise of various nature is considered. The advantages and disadvantages of the existing approaches, as well as the prospects of using artificial neural networks, are noted. A double-layer neural network is used as an image restoration tool, and it is assumed that the location of the damaged pixels is known. A neuron is represented as a 3x3 array, where each element of the array has a pixel color value that corresponds to the value of that color in the palette. The neural network is trained on intact images, while the color difference of pixels acts as a learning criterion. For a more accurate restoration, it is recommended at the training stage to select images similar in color to damaged ones. At the recovery stage, neurons (3x3) are formed around the damaged pixels, so that the damaged pixel is located in the middle of the neuron data array. The damaged pixel is assigned a neuron value depending on the average value of the weights matrix. An algorithm for the restoration of pixels, as well as its software implementation. The simulation was carried out in the RGB palette separately for each channel. To assess the quality of the recovery were selected groups of images with varying degrees of damage. Unlike existing solutions, the algorithm has the simplicity of implementation. The research results show that regardless of the degree of damage (within 50%), about 70% of damaged pixels are restored. Further studies suggest a modification of the algorithm to restore images with enlarged areas of damage, as well as adapting it to restore three-dimensional images.
The paper considers approaches to the construction of a geographically distributed optical-electronic device, providing an analysis of significant and long working scenes in the interests of automating the processes of control and management of robotic tools in industrial assembly shops and warehouses. The principal difference of the proposed solution is the possibility of obtaining images of the analyzed objects using optical-electronic sensors located in different parts of the workspace to realize the function of binocular vision on a much larger area of the working scene compared to analogues. A distinctive novelty of the developed theoretical approach is the approach to binocular technical vision, which consists in iteratively performing calibration procedures for selected pairs of opticalelectronic sensors and the subsequent calculation of the spatial coordinates of the objects being analyzed using calibrated pairs of optical-electronic sensors. The results of image analysis from each of the optoelectronic sensors are used to accompany moving objects and analyze their motion paths in the working scene space. To implement the developed theoretical approaches, a modular optoelectronic device has been developed, consisting of two types of modules. The first type of module is a standalone opto-electronic module, which includes an opto-electronic sensor and means for processing and extracting primary features immediately upon receiving images for their subsequent analysis. The second type is a computational module that provides processing of primary data from a set of modules of the first type. Data transfer between device modules is provided via radio over a WiFi network. A distinctive feature of the developed device is the primary processing of images immediately upon their receipt and transmission over the radio channel of a small amount of data about the selected objects to the computing module, which performs the final stages of data processing and generates a set of parameters describing the characteristics and spatial coordinates of the objects found on the working scene for their further of use. Experimental studies were conducted on the developed simulation model, which confirmed the correctness of the developed theoretical approach and the possibility of its application in practice.
CONSTRUCTION AND ARCHITECTURE
The example of judicial construction and technical examination of the constructed water intake well in one of settlements is considered in this article. The analysis of failures occurred during the operation of the newly built water intake well was carried out. The point moments on the quality and timing of the work performed there are often disputable when putting objects into operation. If these questions cannot be resolved by mutual agreement of the parties, their decision is transferred to the courts, which appoint judicial construction and technical expertise. The type of judicial engineering and technical expertise, judicial construction and technical expertise plays an important and sometimes decisive role in legal proceedings, including the consideration of civil disputes in courts of General jurisdiction and arbitration courts. Judicial construction and technical expertise was appointed on the basis of the decision of the arbitration court for a new water intake well built in one of the settlements of the Kursk region. The reason for the appointment of the examination is that this well has ceased to provide the planned flow rate, and the produced water meet the quality requirements. Two main reasons led to the decline in the technological characteristics of the well and the deterioration of the quality of the produced water: the wrong choice of the pumping unit and the lack of a water tower on the network. The selected ECV 6-16-140 pump created excess pressure in the network, which was then reduced by the installed automation (frequency Converter), and accordingly the well flow rate decreased. The use of frequency converters is not always useful, but can even have a harmful effect on the operation of the water supply system. In addition to reducing the flow rate, the operation of the frequency Converter caused the combustion of several pumps operating in unacceptable modes. The work of the frequency Converter installed on the pump unit with overestimated characteristics led to the turbidity of the produced water, there was an uneven consumption of water from the well.
Currently, the issue of preservation and effective use of cultural heritage is relevant. Bryansk region has a significant number of valuable historical and cultural monuments. Almost every district is rich in unique places of interest, a special place among which is occupied by the estate. Within the framework of the concept of landscaping of the estate of Alexei Konstantinovich Tolstoy in the village of Krasny Rog, Pochepsky district, Bryansk region, together with the company "Bryanskpromburvod" were carried out field surveys, engineering-geological, hydrological surveys and other necessary activities in order to compile a pre-project proposal for the reconstruction of the source of artesian water, taking into account archival and bibliographic materials, with minor changes in view of the current state of the territory of the object of cultural heritage. Taking into account engineering-geological and hydrological researches, results of full-scale inspection of the territory, the technology of drilling of a well, necessary materials and the equipment for its arrangement is picked up. The article considers the issue of attracting tourists and vacationers to the source of artesian water in the estate of Alexei Konstantinovich Tolstoy. Above the source it is recommended to install a pump room for the release of water, in order to protect it from pollution, and perform it in the architectural style corresponding to the period of life of Alexei Konstantinovich Tolstoy in the estate. Historical and cultural heritage can act not only as a factor in the development of spiritual life, but also as one of the promising areas of economic development in the Bryansk region. The attractiveness of the Museum-estate increases the tourist attendance, and part of the funds can be used for the maintenance of cultural heritage.
There is show an experience of modern methods of scheduling in construction. There are reviewed existed scheduling methods: Critical Path Method, Constraints Programming, Job Shop Scheduling. Additionally there were reviewed methods with special edition for construction industry: shortest path planning, continue development frontline volume method, continue resources utilization method. All reviewed methods are simplified and don’t consider stochastic factors. Specific of the construction operation is a especially strong influence of stochastic factors to the construction production processes. There were reviewed methods of time reserve utilization, which appears in different stages of operations. This time reserve could be used, in particular, for minimization of negative aftereffects of stochastic factor influence on elements of construction. For these purpose was created target function of negative aftereffects minimization task, which describes dynamic and stochastic loses. The contribution of stochastic factors is expressed by exponential functions. There is shown, that redistribution of time reserve allows without any dynamic loses, to decrease contribution of stochastic loses. There is shown, that in approximation of independent works, the optimal schedule is that, which considers increasing of time reserve on critical directions. There is showed on individual example of algorithm for negative factors aftereffect minimization. Using this algorithm allows to make schedule with details of minimal approximated stochastic loses. In opposite, having a possibility of resources redistribution to directions, associated by high risks and loses, the optimal schedule plan will be alternative schedule plan, considering a possibility of operative redistribution, even through risks rise on non-critical directions.
The article talks about the practice of designing and building modern secondary schools, as well as the need to rethink the material component of this process, a new look at the adoption of space-planning decisions of similar institutions, based on modern urban planning and typological requirements for the organization of educational work, including the existing level of architectural and urban science. The aim of the study is to analyze the principles and recommendations on the architectural and planning formation of secondary schools that correspond to the specifics of the modern educational process. The study examines the formation of architectural-planning and functional solutions for school buildings based on the search for new approaches in design. The analysis of the modern system of the educational process and its requirements in the development of a new spatial organization of the school environment. In addition to this, the existing structure of education in modern schools is considered, which may further affect the design, change the architectural quality and improve school buildings. It explains how the school space can make an educational sense and what it should be for it to become. The article deals with the problem of reforming the modern Russian school architecture, which stopped in its development at the Soviet stage, which includes most of the school buildings of standard construction. As a result, trends in the design of general education spaces were studied and the main problems encountered in the development of new plans in schools were identified and methods for their solutions were proposed. The necessity of introduction of the modular principle of designing schools with a fundamental difference from the standard building is shown. Each specific project may contain individuality both in visual perception and in the layout of the modules, functional meaning, scale.
In this article the tasks of modeling the flow distribution are considered, and since the consumers of this system are pumping stations, the first place is put forward not social (as in the second rise), and economic (energy) criteria. The water pressure at the pump inlets is determined by the geodesic levels of the pumps. In wells can be installed various pumping equipment, different in pressure and performance, resulting in a significant difference in the pressure produced by the pumping equipment. In the wells can be installed various pumping equipment, different in pressure and performance, as a result of which there is a significant difference in the pressure generated by the pumping equipment. The article presents a transformed version of the nonlinear and linear models of operational management as applied to water-lifting stations. The governance model allows tracking the transition of the system to a new state and the change of parameters along individual lines within this transition. Herewith, if from two wells the water supply to the manifold increases in accordance with a given forecast, then from the third - the water supply decreases. According to the results of modeling of water supply stations can be built throttle characteristic. The synthesis of throttle characteristics obtained on the basis of the operational control model allows for the operational control of the water supply modes to the clean water tank, which is an alternative to direct modeling. Both methods can be implemented as part of the operation of automated control systems for pump stations I and II lifting. The most interesting is the scheme of water supply stations without back pressure with the predominant location of wells with less powerful submersible pumps closer to the area of low pressures in the collector nodes. The results of numerical simulation are presented in the form of throttle characteristics, that is, the dependence of the flow rate of water supplied from a well by a submersible pump through a choke, on its hydraulic resistance coefficient. Due to the throttle characteristics, it is possible to determine the extremely high value of the water flow entering the clean water tank, as well as the possibility of modeling the most economical mode of operation of wells.
The purpose of this paper is to identify the basic principles of formation of a multifunctional complex for extreme sports. It includes a comparative analysis of extreme sports facilities in Kursk as well as a number of previously studied similar projects and existing buildings by Russian and foreign architects. The authors of the paper propose a sports complex that fits into the existing architecture of the city. New technologies have been introduces to implement the design of such complex objects as a wind tunnel, a deep-water diving pool, a large-span indoor skate hall with seats for spectators and overhead light. All these elements have been taken from the projects of well-known architectural firms, such as eXtreme Architects, White Studio, Moko Architects, as well as other foreign projects of Danish and Norwegian architects. The authors also considered some ideas on the reconstruction of industrial facilities, such as a fan depot or a silo tower, which were converted into multifunctional sports complexes. The social, economic and environmental aspects of designing such an object have been taken into consideration. The authors give the regulatory framework including the fire safety requirements, requirements on building maintenance by limited mobility populations (MH), the impact on the environment. Moreover, the authors mention building regulations, which establish requirements to the equipment, inventory and the space of the whole complex. The article examines the importance of building a multifunctional complex for practicing extreme sports, and also confirms the relevance of such sports in Kursk.
The purpose of the study of this work: to provide a scientific justification for the energy-saving device to maintain the normalized parameters of the recirculated air in special “clean” rooms, to derive formulas for calculating the adsorption material during the operation of the installation. The novelty of the constructive solution is protected and confirmed by patents of the Russian Federation for the invention. Methods. The volume of adsorbent determined by this method is placed in a tank with a recirculation loop, which includes: a cleaning unit nozzle, the inner surface of which is spring-loaded with a grid placed on the side of a moving air flow and a grid around the entire outlet section of the expanding nozzle. Spring-loaded mesh, placed on the side of a moving air flow, is made according to the profile of the velocity profile of the moving air flow, which is caused by the manifold speed impact on the adsorbent grains, horizontally arranged layers in order to level the absorbing capacity of silica gel KSM-5 throughout the drying device and use in the system recirculation of the air supplied by the fan leads to a probable entry of the vaporous mass of oil into the stream being cleaned, and the analysis of scientific and technical oh showed no literature data on the nature of such contaminants granular filter material, resulting in the need to study the penetration of the oil by volume adsorbent per cycle electrical testing of electronic devices in a heat chamber. Results. Based on the analysis of well-known foreign and domestic theoretical and experimental studies, there was no development related to vibration effects on the efficiency of adsorption drying of recirculated air for electrical thermal testing of electronic products. An adsorption unit has been developed with a horizontal arrangement of an adsorbing substance for treating air under conditions of vibration effects. Conclusion The installation developed by the authors passed laboratory and industrial tests at the Mayak plant of Kursk and was recommended for implementation as a resource-saving constructive solution protected by patents of the Russian Federation for invention. Keywords: special premises electrical testing of electronic products, recirculation circuit in the chamber for temperature testing - heat chamber, adsorption drying, transparent body of the drying device, oil contamination.
This article deals with the problem of designing and building all-season ski resorts. Currently, the sport is actively developing and every year more and more people show their interest in alpine skiing sports. As anndependent sport, it was formed in Europe around the middle of the twentieth century, and quickly quickly won many fans around the world. At the moment, the total number of skiers is estimated at 80-100 million people. Amateurs and athletes face the problem of training in the summer, as large ski resorts in our country can work fully only from November to May, when there is enough snow in the mountains. The design of sports complexes for all-season winter sports is currently an urgent problem, acquiring particular importance in connection with the development of alpine skiing. Analysis of such indoor ski resorts as "Sneg.Com", "Ski-Dubai" and "Snow World Lundgraaf" located in Russia and abroad promote the idea of creating an artificial environment where there is no natural area for skiing, which proves the integration of scientific achievements. Until recently, the structure of the ski complexes included only planar structures, such as: well-equipped prepared ski slopes, skating rinks and snowparks with springboard lines. But special installations were invented that were able to create a steady snow cover inside the building, and this led to the emergence of a new volumetric type of sports facilities - indoor ski resorts. An artificial environment with special geometric characteristics is created inside these structures, suitable for creating and maintaining year-round sustainable snow cover, which allows you to engage in winter sports such as skiing, tobogganing, and snowboarding.
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