Technological Scheme Research Articles

Laser deposition of aluminum and magnesium‑based alloys for repair and surface restoration of components

The results of studying the processes of laser deposition of aluminum and magnesium‑based alloys, the features of the structure of deposited layers using electron microscopy and X‑ray computed tomography data, measurements of microhardness after laser deposition of aluminum and magnesium alloys are presented. Modeling of the stress‑strain state of flat components during laser deposition of an aluminum‑magnesium alloy containing 0.6–0.95 % magnesium, 0.7–1.0 silicon, up to 0.3 titanium, up to 0.5 zinc, and up to 0.4 % manganese was performed. The nature of the distribution of deformations and stresses during the use of various technological schemes of laser deposition during surface treatment of aluminum‑magnesium alloys by laser deposition methods is established.

Research of VDT scheme for porous media thermal-hydraulics analysis of plate-type fuel assembly

Thermal-hydraulics analysis of nuclear reactor core is crucial for the safe operation of nuclear power plants. Porous media models in computational fluid dynamics (CFD) code are commonly used to simulate flow and heat transfer in nuclear reactor cores because they simplify geometry and reduce computational cost. However, their low spatial resolution limits detailed analysis of internal flow and temperature fields. This research develops a Virtual Domain Technology (VDT) scheme to improve the resolution of porous media models without increasing mesh density. VDT sets localized resistance coefficients to create virtual solid and fluid domains within the porous core representation. The flow and thermal effects of these virtual domains mimic real structural effects. VDT was verified on a cylinder flow case and showed excellent agreement with CFD for velocity and pressure fields. Application to a plate-type research reactor core demonstrated VDT’s ability to capture detailed temperature profiles and flow traces consistent with CFD, using only 6% as many mesh cells. By improving spatial resolution, VDT enhances porous media-based modeling of reactor cores to provide more accurate thermal-hydraulics analysis, while maintaining computational efficiency. This will aid optimization and safety analysis for advanced reactor designs.

Optimal layout scheme of fire detectors and operation condition monitoring technology in urban integrated substation

Aiming at the problem that it is difficult to obtain the life cycle law and detection coverage of fire detectors and the low reliability of fire alarm process in urban integrated substation, an optimal layout scheme and operation condition monitoring technology of fire detectors based on local outlier factor and neural network are proposed. Divide fire zones by equipment functions, calculate the number of fire detectors required by using ground area and indoor height, and integrate building automation system to create substation fire alarm system; The signal noise of fire detector equipment is eliminated by wavelet transform, the fuzzy characteristic analysis model of fire detector operation state is established, the local outlier factor is simulated as abnormal data, the past operation data is trained by BP(Back propagation) neural network, the difference between the current state and the normal operation state is obtained, and the detector operation state monitoring is completed. The operation reliability of fire detector is analyzed from the aspects of temperature and smoke perception. The simulation results show that the proposed technology can successfully obtain the life cycle law and detection coverage of fire detector, and ensure the safe use of urban integrated substation. In addition, through a series of experiments, the feasibility and effectiveness of this technology in practical applications are verified.The maximum time consumption of detector working condition monitoring in this method is only 3.3 s. The fitting degree of the method in this paper is 5.7 ml/m3, and the fitting degree of the actual smoke curve is 5.7 ml/m3. The temperature of the method in this paper is lower than 33 °C. In the future development, the introduction of more advanced self-diagnosis technology can be real-time monitoring and analysis of the status of the detector itself, timely detection of faults or anomalies, and automatic alarm or notification of maintenance personnel for repair and maintenance.

The injection capacity evaluation of high-pressure water injection in low permeability reservoir: numerical and case study

Low permeability oil reservoir resources are rich and their efficient development is considered an important way to solve energy security issues. However, the development process of low permeability oil reservoirs is faced with the challenges of insufficient natural energy and rapid production decline. The high-pressure water injection technology is a method that relies on high-pressure and large-volume to inject fluid into the reservoir to replenish energy. It is considered as an important technical means to quickly replenish formation energy. This study focuses on the injection capacity for the high-pressure water injection technology of low permeability oil reservoir. Firstly, the fluid-structure interaction mathematical model for two-phase fluid flow was established. The solution of the mathematical model was then obtained by coupling the phase transport in porous media module and Darcy’s law module on the COMSOL numerical simulation platform. The numerical model established in this study was verified through the Buckley-Leverett model. The study on the injection capacity of high-pressure water injection technology was conducted using the geological background and reservoir physical properties of Binnan Oilfield (Shengli, China). The results show that the production pressure difference is the key factor in determining the injection capacity. When the production pressure difference increases from 5 MPa to 30 MPa, the cumulative injection volume increases by 8.1 times. In addition, sensitivity analysis shows that the injection capacity is significantly influenced by the properties of the reformation area. The effect of these parameters from high to low is as follows: stress sensitivity factor, permeability, rock compressibility, and porosity. Compared to the reformation area, the influence of the physical parameters of the matrix area on the injection capacity is negligible. Therefore, effective reservoir reformation is essential for enhancing the injection capacity. This research provides a theoretical basis for the design and optimization of the high-pressure water injection technology schemes for low permeability oil reservoir.

RESEARCH ON THE RELATIONSHIP BETWEEN THE THICKNESS AND THE STRUCTURAL CONDITION OF ROLLED METAL FROM LOW-CARBON LOW-ALLOY STEEL 10G2FB

When choosing steels for the design of high-rise and long-span buildings with increased load-bearing capacity, it is advisable to give preference to thick rolled steel from low-carbon, low-alloy steels, since it, with the same level of strength as construction steels, has a higher level of plasticity. At the same time, the problem of using thick rolled steel from low-carbon, low-alloy steels in the construction industry are the anisotropy of the rolled metal properties, which can increase with an increase in the thickness of the rolled metal. Currently, in Ukraine, controlled rolling is one of the most promising technologies of high-temperature thermomechanical processing for the production of thick rolled metal from low-carbon, low-alloy steels. At the same time, with an increase in the thickness of the rolled metal, which is produced with this technological scheme, the effect of the regulated formation of the structural state decreases due to the influence on the temperature of the surface layers of the rolled metal, the thermodynamic state of the inner layers and the inability of the rolling equipment available at domestic enterprises to deform the metal over the entire cross-sectional area. Therefore, the task of obtaining such a structural state in the thick sheet metal roll, which will ensure the reduction of the anisotropy of the properties, which will allow the use of such rolled metal in the construction industry, is urgent. Purpose of the article is to study of the structural state of low-carbon low-alloy steel 10G2FB, which was produced using the technology of controlled rolling, depending on the thickness of the rolled metal. Conclusion. The relationship between the structural state and the thickness of rolled metal from low-carbon low-alloy steel 10G2FB, which was produced by controlled rolling technology, was studied. It was established that with the increase in thickness, the percentage content of the ferrite component increases with a simultaneous decrease in the percentage content of the pearlite phase. It is shown that changes in the formation languages of structural components begin with an increase in the thickness of the rolled metal over 30 mm, which is explained by the influence of the temperature of the inner layers on the processes of forming the structural state, namely, with an increase in the thickness of the rolled metal, the thermodynamic rate of phase transformations in the middle layers of the rolled metal samples decreases. This conclusion is confirmed by two factors: firstly, an increase in the size of pearlite colonies, and secondly, a change in the morphology of the cementite framework of pearlite colonies from zigzag (thickness 16...30 mm) to ribbon (thickness 40...100 mm).

Technological features of cultural ecosystem services assessment

The benefits that city residents receive from green spaces related to maintaining their health are a group of cultural ecosystem services (CES). To avoid subjectivity in the assessment of CES, there is a methodology based on determining the effectiveness of green spaces in providing them. Currently, there is no technological scheme for assessing the CES available to urban planners. Accordingly, the purpose of the paper is to highlight the technological features of the CES assessment. Methodologically, the work consists in creating a geodatabase (DB) on the state of green spaces and anthropogenic pressure on them. All the calculation indicators proposed in the methodology should be included in the database as attributes, and their calculation should be performed as working scenarios documented in the form of automated calculation models, etc. The technology is based on QGIS/SAGA spatial analysis tools (QGIS version 3.32.1-Lima), which contains the necessary basic geoprocessing algorithms and modules for calculating the CES. The technology for estimating CES is presented in the Model_CES. The functioning of the Model_CES depends on the amount and quality of input data. As input data, the database includes information on: urban green spaces; vegetation; landscapes; areas with multi-age urban development; local areas of urban population concentration; survey statistics, etc. Attribute information is the basis for the correct operation of the Model_CES algorithms, in particular, the calculation of parameters by which it is proposed to assess the volume of CES. Adequate to the parameters, a file database in the GeoPackage format was formed in accordance with the standards of the Open Geospatial Consortium - Model_CES, which contains the input data sets: tabular: "survey_all"; vector: "Vegetation", "BGI", "local_district", "hollow", "age_consruct". Technological procedures and algorithm for calculating CES volumes and risks of their loss in Model_CES form calculation blocks: 1. a block for determining the potential of green spaces in providing CES; 2. a block for determining the effectiveness of the green space in providing CES - the real supply of CES; 3. a block for calculating the volume of ecosystem services and the risks of their loss; 4. a block for calculating the score of alternative availability of the green space. As a result, the proposed algorithm produces the output geodataset "BGI_CES". After the implementation of the technology, this dataset contains attribute information about each green space, in particular, their ability to provide cultural ecosystem services, efficiency in providing CES, the volume of CES and the risks of their loss. Thus, the paper solves the scientific task of creating an assessment technology that meets the following requirements: it is suitable for processing information that is spatially distributed; it is focused on the availability of uncertain and often limited data; it is available for use by specialists of design and other institutions that may be limited in data. The presented technology can be used in urban planning practice as a tool for improving the quality of urban green spaces, their sustainable development and providing citizens with the maximum amount of CES.

Development of the technological basis for the production of aceclofenac

Aceclofenac drugs are widely used in the global therapeutic practice of inflammatory and painful conditions for the treatment of osteoarthritis, rheumatoid arthritis, and ankylosing spondylitis in various dosage forms. The basics of the technology of domestic industrial batch production of aceclofenac with a capacity of 110 t/year for the production of a number of effective medicines have been developed. A five-stage production process is proposed that will allow the production of a domestic product with a high yield (~ 91 %) from commercially available reagents. Material calculations were carried out to determine the consumption rates of raw materials. The types of equipment were selected, and the number of equipment was determined. The basic technological scheme and technological flowchart for the production of aceclofenac are proposed.

Technology of extraction of fuel mass from ash and slag waste in Ukraine

Purpose. Development of a technological scheme for the processing of ash and slag waste from coal-fired thermal power plants. The methods. The ash and slag dumps of thermal power plants are made up of the main components - slag, ash and unburned coal particles, drawing up an appropriate scheme for the extraction of coal particles allows the development of an effective scheme for the processing of ash and slag outputs of thermal power plants. The slag is separated from the fly ash by classification on a screen. Next, the method of extracting fuel mass from fly ash is used - the flotation method, based on the selective fixation of coal particles on the surface of air bubbles in the flotation chamber, with subsequent extraction of coal particles into a foam product. The mineral part of the ash cleaned from the fuel mass is ready for use in the road construction industry. Findings. A technological scheme for the processing of ash and slag waste of coal-fired thermal power plants has been developed, which makes it possible to obtain slag, high-quality coal concentrate, and the mineral part of ash. The originality. For the first time, a mathematical model was developed for forecasting indicators of enrichment of ash and slag waste of coal-fired thermal power plants by the flotation method. To predict beneficiation indicators, it is necessary to use three disclosure values: the initial ash content of the coal fraction (Aпd), the number of coal grains (PРЗ), the number of rock grains (PНЗ), provided that the separation characteristics of the beneficiation equipment are experimentally determined in advance. On the basis of the developed mathematical model of forecasting indicators of ash slag waste enrichment, an appropriate flotation scheme for effective extraction of fuel mass was drawn up, which made it possible to develop a technological scheme for processing ash slag waste of coal-fired thermal power plants. Practical implementation. The developed technological scheme for the processing of ash and slag waste makes it possible to obtain slag with a yield of 3.11% suitable for filling industrial roads, coal concentrate with a yield of 25.75% with an ash content of 21.80% can be used as a secondary fuel for thermal power plants or as a raw material for production solid fuel briquettes, as well as the mineral part of ash with a yield of 71.14% with an ash content of 98.10%, which can be used in the road construction industry.

РОЗРОБЛЕННЯ БІОТЕХНОЛОГІЇ КИСЛОМОЛОЧНИХ НАПОЇВ З БІОАКТИВНИМИ ФІТОЕКТРАКТАМИ СОЛОДКИ

A functional fermented milk drink with plant extracts for prevention and recovery was studied. The data of classical fermentation were used, in particular, the peculiarities of the preparation of phytoextracts for the development of a functional fermented milk drink. The recipe was developed and the influence of licorice root extract concentration and the type of bacterial starter on the physical, chemical and organoleptic characteristics and biological activity of the biobeverage was studied. The specifics of fermentation were taken into account when developing a technological scheme for the pilot production of a functional fermented milk drink with licorice root phytoextract.

Development of Novel Carousel Milking Platform Technology Scheme Based on Magnetic Levitation Principles

Development of Novel Carousel Milking Platform Technology Scheme Based on Magnetic Levitation Principles

Technological research of syrup with dipyridamole

A new liquid dosage form with dipyridamole has been obtained. A 50 % fructose solution was selected as the auxiliary component. The flavoring agent was «Orange», and the coloring agent was an orange color. The resulting dosage form, i.e. syrup, has a pleasant color, taste, and smell. 0.5 % sodium benzoate was used as a preservative, which provided a bacteriostatic effect for 24 months. Purpose of the work: to develop an optimal technological scheme for the production of a syrup with dipyridamole, establish critical points, and justify the use of flavoring and coloring agents and preservatives. Materials and methods. An integrated approach, based on modern principles of drug development (ICH) and implemented by means of modern equipment and the necessary research methods, was used. When developing the original syrup dosage form of dipyridamole, chemical, physicochemical, technological, pharmacological, and microbiological research methods were utilized. Technological methods included the preparation of fructose syrup (50 %); then dipyridamole (0.325 %) was added to the intermediate product. Results. The introduction of dipyridamole into a liquid dosage form, i.e. syrup, is a promising way to expand the range of dosage forms (DF) of dipyridamole, represented only by film-coated tablets and a suspension for oral administration (Rosemont Pharmaceuticals Ltd, UK). Conclusion. The result of the research has been the production of syrup with dipyridamole. It was found that the best composition was based on fructose, which was superior in taste to sucrose and sorbitol. Flavoring agents «Cherry», «Orange», and «Cocoa» were added to sugar-based syrups. The «Orange» turned out to be the optimal flavoring agent.

Structural features and crystallization of Na2O-Cs2O-B2O3-SiO2 glasses for radioactive waste immobilization

Borosilicate glasses have long been the preferred form for immobilizing high-level radioactive wastes. However, a significant drawback of glass-matrices involves the low rate of loading with radionuclides. One of the approaches to solving this problem envisages a multiphase glass system with crystalline inclusions. The present work aims to study model borosilicate glasses and glass-ceramics containing Cs atoms serving as a radionuclide simulator. Two approaches for the synthesis of glass-ceramics were used: directed crystallization, and pressing followed by annealing. The structure of initial borosilicate glasses and glass-ceramic samples obtained by these means was studied using Raman spectroscopy. An X-ray diffraction analysis was applied to identify crystalline phases. The morphology and composition of the crystalline phase was evaluated using scanning electron microscopy. The obtained results showed that the structure and properties of the synthesized glass-ceramic material is determined by the composition of initial glasses. Due to the ratio of modifying cations in glasses at a constant boron-to-silicon ratio, the crystalline phases identified in glass-ceramics are significantly affected by the anionic structure. The formation and growth of crystals was also established to be dependent on the technological scheme of synthesis.

IMPROVEMENT OF CAPILLAROSCOPY METHOD FOR STUDYING HUMAN MICROCIRCULATION

The human circulatory system has historically captivated researchers in the field of medicine. Modern medicine, however, has moved beyond identifying a single crucial element, such as the heart or venous system, for maintaining blood flow. Instead, it emphasizes a more analytical approach, focusing on the interconnected functioning of all components within the system. The aim of this work is to analyze the existing methods of studying blood microcirculation and to improve the technology of capillaroscopy, technical means of raster microphotography to determine the physiological state and disorders of capillary circulation. To achieve this objective, we address the following tasks: analyzing existing non-invasive methods for studying the human vascular system; enhancing the optical capillaroscopy method through the utilization of modern high-resolution digital cameras, computer, and multimedia equipment, along with appropriate software for analyzing electronic images; developing a technological scheme and equipment design for digital microphotography of capillaries in the periungual region of the upper extremities; providing software solutions for registering and analyzing digital microphotographic images obtained through capillaroscopy; conducting experimental studies to explore the structure and properties of capillaries utilizing the developed technologies and equipment. Magnetic resonance imaging (MRI) enables the comprehensive evaluation of both anatomical and functional aspects of blood flow. Magnetic resonance angiography (MRA) capitalizes on the distinction between the signal emitted by moving tissue (blood) and that of surrounding stationary tissue, facilitating the acquisition of vascular images without the need for radiopaque contrast agents. Ultrasonography integrates Doppler and conventional ultrasound techniques, providing physicians with insights into blood vessel structure and blood flow dynamics. Traditional ultrasound employs sound waves that are imperceptible to the human ear and bounce off blood vessels, while Doppler ultrasound measures the velocity of sound wave reflection from moving elements. Ophthalmoscopy constitutes a fundamental component of standard ophthalmological examinations, serving as a pivotal tool for diagnosing eye conditions and evaluating the condition of blood vessels. Additionally, ophthalmoscopy aids in diagnosing autoimmune disorders. Capillaroscopy enables comprehensive assessments of both systemic and regional microcirculation disorders, facilitating the characterization of tissue metabolism. Dysfunction in capillary function contributes to circulatory impairments, leading to blood stasis, metabolic irregularities, and compromised immunity, thereby exacerbating existing conditions and predisposing individuals to new diseases. Optical computerized capillaroscopy offers a non-invasive means of visualizing, examining, and archiving capillary images, enabling clinicians to make informed assessments regarding blood microcirculation. Experimental validation of the optimized hardware and software capillaroscopy system was conducted using nail bed capillaries of a patient with type II diabetes mellitus undergoing insulin therapy for 10 years. This study underscores the importance of refining and enhancing optical capillaroscopy methodologies by leveraging high-resolution camera sensors and modern computational tools for image processing.

Biological features and meat productivity of young pheasants during intensive rearing

In pheasant breeding, the influence of the method of housing on the meat productivity of the livestock has not been sufficiently studied yet, and the reserves of the young pheasants’ growth potential during crossbreeding have been little utilized. At the same time, it is necessary to clearly determine the influence of sexual dimorphism of pheasants on meat productivity parameters in order to effectively improve the technology of rearing meat pheasants for increased weight categories. The purpose of the work was to study the biological characteristics and parameters of meat productivity of young pheasants during intensive rearing. The increase in meat productivity of pheasants by crossbreeding F1 (♂ Romanian pheasant × ♀ hunting pheasant) against the background of optimizing the conditions for housing crossbred young animals and using a new feeding system based on the predominant use of corn grain with phase changes in the concentration of energy and protein in compound feed was studied in the work. When developing a new technological scheme for the intensive rearing of pheasants for meat up to increased weight categories, the feeding preferences of the birds, the infl uence of sexual dimorphism, blood parameters and features of the histological structure of muscle tissue were taken into account. It has been established that in order to increase the production of high-quality pheasant meat, it is necessary to intensively raise crossbred F1 cockerels (♂ Romanian × ♀ hunting pheasant) in an open-air cage (0,4 m2/head) and the use of compound feed with a constantly high specifi c gravity of crude protein (up to 25 %) and corn grain component (50–55 % by weight of the compound feed), which makes it possible to obtain increased weight categories of meat pheasant at the age of 16 weeks such as live weight of young animals 1551,2±25,09 g, and gutted carcass weight 1228,3±11,85 g.

ЗАБЕЗПЕЧЕННЯ ПІДВИЩЕНОЇ ДОВГОВІЧНОСТІ КОНСТРУКЦІЇ ДОРОЖНЬОГО ПОКРИТТЯ НА ЗАЛІЗОБЕТОННИХ АВТОДОРОЖНІХ МОСТАХ

Introduction. The pavement on reinforced concrete road bridges is one of the main structural elements of the structure, the technical condition of which affects the safety of the structure as a whole. The durability of the asphalt pavement is influenced by a number of factors, including the type of construction of the designed pavement, including the waterproofing coating, as well as the resistance of the structure to climatic factors and the effects of traffic. Problemstatement. Most of the highway bridges were built in the 60s and 80s of the 20th century. The artificial structures were designed in accordance with the regulations and technical specifications in force at the time, taking into account the prospects for the development of transport infrastructure and calculating the estimated traffic intensity of up to 20 thousand vehicles per day. However, over the last decade, the intensity and speed of road traffic has increased significantly, as well as the movement of heavy vehicles (mostly uncontrolled), especially in summer, when the air temperature fluctuates above +28 °C. In turn, this leads to excessive load on the bridge deck structures, including the asphalt pavement, which leads to its destruction (formation of cracks, potholes, sagging, rutting and other damage). Results. A technological scheme for the construction of a pavement with increased durability on reinforced concrete road bridges is presented.

Research on the Effectiveness of Lidar Survey for Large Mapping

Abstract. The analysis of the time spent on the processes and the complex of works on topographic mapping in accordance with production projects is given. The projects were carried out according to traditional technological schemes of work and technological schemes using airborne laser scanning materials to generate digital topographic plans at scale the 1:2000 based on the use of unmanned aircraft. The comparative performance of the technologies was determined based on taking into account the time spent for field and in-house work. When using air laser scanning data in addition to air photography, there is an increase in work productivity.

Making a U-turn on the Purfleet Interchange: Stone Tool Technology in Marine Isotope Stage 9 Britain and the Emergence of the Middle Palaeolithic in Europe

This paper re-examines earlier Palaeolithic core technology from British sites assigned to MIS 11, 9, and 7 using primarily a châine opératoire approach, with the objective of better understanding the earliest occurrence and distribution of Levallois and other prepared-core technologies across the Old World. Contrary to previous interpretations (White and Ashton in Current Anthropology, 44: 598–609, 2003), we find no evidence for a true Levallois concept in MIS 11 or MIS 9 in Britain. Cores previously described as ‘simple prepared cores’ or ‘proto-Levallois’ cores show neither evidence of core management nor predetermination of the resulting flakes. They can instead be explained as the coincidental result of a simpler technological scheme aimed at exploiting the largest surface area of a core, thereby maximising the size of the flakes produced from it. This may be a more widespread practice, or a local solution derived from existing principles. Levallois appears fully formed in Britain during terminal MIS 8/initial MIS 7. Consequently, Britain does not provide evidence for an in situ evolution of Levallois, rather we argue it was introduced by new settlers after a glacial abandonment: the solution to the emergence and significance of Levallois lies in southern Europe, the Levant and Africa.

Mechanism and technological results of sulfidation roasting of oxidized lead compounds

The paper presents the results of a critical analysis of existing technologies for processing lead-zinc ores and industrial products; the relevance of the research lies in the development of methods aimed at additional extraction of zinc and lead in conditions of a rapid decrease in the content of lead and zinc in ores. The paper presents research on the thermodynamic justification of sulfiding roasting, the results of the development of technology for intensifying the process of processing poor, difficult-to-process complex lead-zinc ores and middlings through preliminary thermal activation by sulfiding roasting in a fluidized bed furnace. The mechanism of sulfidation of oxylated lead compounds has been established according to the scheme: PbO → PbO·PbSO4 → PbSO4 → PbS. The results of the physicochemical study of roasting products, as well as the results of magnetic enrichment of cinders, are presented. The results of magnetic separation of cinders after heat treatment of industrial products show that it is possible to separate up to 70% of iron in the form of pyrrhotite into a magnetic product, while the pyrrhotite content in the magnetic product is up to 98.2%. The paper presents a new technological scheme for processing lead-zinc industrial products from enrichment to obtain pyrrhotites with predicted properties.

Improved Convolutional Neural Network Algorithm for Student Behavior Detection in the Classroom

The performance of the existing student classroom behavior detection model is affected by various aspects such as dataset, algorithm and height as well as the differences between different classrooms, and there are problems such as a single dataset, low accuracy and low efficiency. In order to improve the accuracy of student classroom behavior detection algorithm, this paper proposes a student classroom behavior detection method based on improved convolutional neural network algorithm. Firstly, the student behavior detection dataset is constructed, and the student classroom behavior detection technology scheme is designed; secondly, in order to improve the detection accuracy, the features are extracted by using the new jumping bi-directional paths, and the attention mechanism module is added at different positions to improve the path aggregation network; weekly, the embedding positions of the attention mechanism strategy are determined by analyzing multiple sets of experiments, and the proposed student classroom behavior detection algorithm's effectiveness and superiority.

Development of the oil-contaminated wastewater treatment technology for trucking companies

Industrial activity of trucking companies belongs to environmentally dangerous processes, which leads to the pollution of natural ecosystems, both in local and regional scale. Currently, there are strict requirements for the quality of wastewater discharged from trucking companies and car-wash sites into the outer sewer or the storm water network. This erases the urgency of the installation of local treatment facilities and implementing of the water circulating supply systems with maximum water consumption and minimum discharge of wastewater into natural water bodies. The improved technology of wastewater treatment for the trucking companies with preliminary stage of the multilayer oil-trap treatment is presented. The modeling of sedimentation process of wastewater contaminated with petroleum products allowed determine structural parameters of the proposed oil trap. The main technological parameters of wastewater treatment according to the proposed technological scheme have been determined. Implementation of the proposed technology at the trucking company allows reduce the content of petroleum products and suspended solids according to Ukrainian normative standards for water quality. This improvement minimizes the impact of contaminated wastewater on neighboring water bodies and extends capacity for water reuse in the technological process of trucking companies.