bluuebunny/crossref_metadata_2025 huggingface dataset:
Big Data Framework for Crowd Monitoring in Large Crowded Events
Authors: Naeem A. Nawaz  , Abaidullah Muhammad , Abid Adnan
Published: September 2023

The management of large events with hundreds of thousands of individuals has remained a challenge over the years. Crushes and stampedes occurring in the events of mass gathering have swallowed many valuable lives around the world. Considering the substantial advancement in positional tracking, wearable technology, and wireless communication, many event organizers are embracing the use of these technologies to get assistance in managing large events. Intelligent monitoring of crowd movement and timely analysis of evolving conditions may aid in early detection of critical situations. The current research aims to propose a big data resource framework to model, simulate, and visualize the crowd conditions for actual venue settings. A distributed framework has been presented to monitor the movement and interaction of individuals in large crowded events through localized sensing and geospatial analysis of massive positional data. The pilgrimage (Hajj) has been considered as a case study for demonstrating the effectiveness of the proposed framework. The proposed framework has been with the help of synthetic data that covered some useful and frequent scenarios based on the case study of pilgrimage (hajj), which is an annual event involving more than a million people.
La salud intercultural como complemento de la medicina occidental en México
Authors: Rodríguez Pacheco Juana , Osuna Flores Israel
Published: September 2023

El objetivo del presente trabajo es analizar los factores que han provocado la falta de complementariedad entre la medicina tradicional y la occidental, para coadyuvar a enriquecer y alentar la interacción y comprensión entre estas dos importantes áreas del conocimiento médico. Se llevó a cabo una revisión bibliográfica y documental sobre aspectos de salud intercultural en general y en particular en México.  La salud intercultural es el resultado de la complementariedad del sistema de salud occidental y tradicional milenario de los pueblos y comunidades indígenas y afro mexicanas. Se requiere de una mayor interacción entre la medicina occidental e indígena y unos de los factores que frenan la complementariedad son la comunicación, reconocimiento de la diversidad lingüística y la falta de capacitación de los profesionales de salud que inciden en la atención a la salud en estas comunidades marginadas. Se tiene que seguir alentando la interacción entre estas dos importantes áreas del conocimiento médico en México.
Phenomenon of Female Composer in Musical Culture of China in the Twentieth Century
Authors: Qiu Difan
Published: September 2023

The purpose of the article is to identify the specifics of the role of women composers in the musical culture of China in the twentieth century. The research methodology consists in applying the methods of analysis and synthesis, systematisation of facts, comparison and generalisation of the research results. The systemic-historical method allowed the author to consider the formation of female archetypes in the Chinese musical culture of the twentieth century. With the help of the comparative method, the stages of the creative development of women composers in the Chinese national culture of the twentieth century were structured. The scientific novelty of the study lies in an attempt to reveal the originality of the Chinese musical avant-garde, to identify the role of women composers in the musical culture of China in the twentieth century and the level of influence of Chinese traditional and Western compositional techniques of various stylistic techniques on their work. Conclusions. The synthesis of Chinese philosophy, archaic folk music and Western compositional techniques reveals the originality of the Chinese musical avant-garde of the twentieth century. For centuries, women's rights were severely restricted. However, at the beginning of the twentieth century, important reform processes were launched that led to a change in the social status of women in China, including the musical sphere. Starting in the mid-twenieth century, women composers, on the one hand, cultivated the musical traditions of their country, and, on the other hand, were influenced by Western compositional technologies. In this context, a special place is occupied by the Chinese composer Du Yun and her monumental opera "Angel's Bone" — a delicate psychological canvas that successfully combines the styles of different eras.

Key words: musical culture of China, phenomenon of female composers, tradition, originality of Chinese culture, influence of Western musical culture.
Stage Unity of D. Lider’s Plastic Concept of Scenography and S. Danchenko’s Theatre Direction
Authors: Gusakova Nina , Devizorov Maksym
Published: September 2023

The purpose of the study is to highlight the stage unity of the plastic concept of D. Lider’s scenography and S. Danchenko’s theatre direction, to characterise the original concept of the image of the performances, their uniqueness of artistic solution. The research methodology is to apply the functional and typological method to consider the scenographic activity of D. Lider as an innovative form of artistic creativity in the context of the formation and development of the direction of effective scenography, as well as to assess its significance in the development of scenographic vocabulary of the Ivan Franko National Academic Drama Theatre. The art method is used to analyse the scenographic solution of the performances directed by S. Danchenko and to identify the main conditions and principles of scenographic solutions, compositional techniques and components of D. Lider’s scenography, as well as to determine their influence on the artistic image of the productions. An axiomatic method helped consider Danylo ider's worldview prerogatives in the context of the peculiarities of the formation of his philosophy and artistic and aesthetic position as a master of effective scenography. The novelty of the study. The article comprehensively examines the stage unity of the plastic concept of D. Lider’s scenography and S. Danchenko’s theatre direction in the context of the formation and development of the scenography of the Ivan Franko National Academic Drama Theatre. Conclusions. As a philosopher of theatre, D. Lider’s scenography is not guided by any prescribed rules, and it is impossible to judge it by means of a defining judgment, by imposing certain already known categories on his scenographic vocabulary. The scenery created by the master testifies to an innovative form of the sublime that allows for the acquisition of creative energy – D. Leader sought to overcome the dictates of sensual perception of reality in order to reflect the essential, hidden characteristics of existence. The associative connection and drawing parallels between the actual problems of the present and the problems of a literary work as the basis for deep philosophical and aesthetic reflections introduced by D. Lider is the basis of Ukrainian stage art of the twenty-first century.

Key words: Danylo Lider, Serhii Danchenko, director, theatre, scenography.
Optic neuritis with normal visual acuity – A case report
Authors:   Vietnam National University Ho Chi Minh City, Vietnam, Tran Bao Hong ,   School of Medicine, VNU-HCM, Vietnam, Hoang Linh Mai ,   University of Medicine and Pharmacy Ho Chi Minh City, Vietnam
Published: September 2023

Background: Optic neuritis is an acquired disorder of the optic nerve due to inflammation or demyelination. Diagnosis of optic neuritis was based mainly on clinical signs and symptoms, ancillary tests only help confirm the diagnosis or follow treatment progress. However, in cases with high visual acuity and with mild or without optic disc edema, the disease can be easily underdiagnosed. Case report: We report a case of optic neuritis with normal visual acuity. The patient complained of blurring vision and mild pain in her right eye upon gazing; however, her right eye best corrected visual acuity was 20/20. Ishihara color vision test was 20/24 on her right eye and 24/24 on her left eye. Relative afferent pupillary defect was detected, fundus examination revealed mild optic disc edema, and visual field test showed enlarged physiological blind spot on her right eye. The patient received careful follow-up with no corticosteroids treatment. After 3 months, all the signs and symptoms resolved completely. Conclusion: This case demonstrated that optic neuritis can be easily underdiagnosed; relative afferent pupillary defect check, visual field, magnetic resonance imaging and color vision test should be performed in every suspected cases. Strict follow-up check, instead of corticosteroids may be of priority when patient visual acuity is still good.
Prevalence of gestational diabetes and related factors of pregnant women having prenatal care at Tu Du hospital in 2020
Authors:   Medical Student 2015-2021 School of Medicine VNU-HCM, Vietnam, Le Ngoc Bao , Nguyễn Vinh Quang ,   Medical Student 2015-2021 School of Medicine VNU-HCM, Vietnam, Trần Quang Minh ,   Medical Student 2015-2021 School of Medicine VNU-HCM, Vietnam, Lê Duy Khắc ,   Medical Student 2015-2021 School of Medicine VNU-HCM, Vietnam, Phạm Hiếu Trung ,   Medical Student 2015-2021 School of Medicine VNU-HCM, Vietnam, Trần Lợi Thị ,   Division of Obstetrics and Gynecology , School of Medicine, VNU-HCM, Vietnam
Published: September 2023

Objective: Determine the prevalence of gestational diabetes and related factors of pregnant women having prenatal care at Tu Du hospital in 2020. Materials and Methods: Cross-sectional study on 250 singleton pregnant women with gestational age from 24 to 28 weeks who had prenatal care at Tu Du hospital in 2020. All pregnant women were tested for oral glucose tolerance test (OGTT) using the 2015 American Diabetes Association (ADA) criteria for diagnosis of gestational diabetes. Based on the structured questionnaire, we interviewed pregnant women about socioeconomic characteristics, diet and obstetrical history and got information for health status and OGTT in prenatal care records. Results: The prevalence of gestational diabetes of pregnant women who came to Tu Du hospital for prenatal care in 2020 was 32%, 95% CI [26.3-38.2]. The related factors to gestational diabetes with statistical significance are: (1) BMI before pregnancy R=1.18, 95% CI [1.07- 1.31], p=0.001 (2) past history number of gestational diabetes R= 5.23, 95% CI [1.56-17.54], p= 0.005, (3) eating yogurt > 5 days/week, > 1 box/ day R=1.14, 95% CI [1.01-1.28], p=0.038. Conclusions: Prevalence of gestational diabetes is 32%, which is a matter of great concern at the moment. There should be recommendations on a reasonable diet and closely monitored during pregnancy with particular emphasis on high risk pregnancy for pregnant women to reduce the risk of gestational diabetes.
Scientific activity of Alkey Margulan in the study of the history of Kazakhstan: Golden Horde
Authors:   L.N. Gumilyov Eurasian National University, Shakiyeva A.
Published: September 2023

The main aim of the scientific research is to study the contribution of a Kazakhstani scientist to the development of historical science, consideration of the issue of research in the field of the history of culture of the Kazakh people. The author examines the activities of the Kazakh scientist, archaeologist, orientalist, historian, literary critic, academician of the Academy of Sciences of the Kazakh SSR Alkey Khakanovich Margulan and his contribution to the development of the historical culture of Kazakhstan. In the article, the author comprehensively explores his scientific activities in the study of the history of the Golden Horde and focuses on new scientific discoveries on the territory of the Kazakh land. Alkey Khakanovich Margulan began his career in the field of science at a time when ideological persecution of many scientists began. The change in the scientific direction of Kazakh folklore to the study of monuments of material culture and ancient art is considered as well. The scientific activity of academician Alkey Margulan as a scientific employee at the Academy of Sciences of the Kazakh SSR is noted, as well as his participation in the creation of the scientific publication "History of the Kazakh SSR (from ancient times to the present day). Particular attention is drawn to his study of the folk epic, and the impact on the future fate associated with the study of archeology. The author used documents from the central archive of the Republic of Kazakhstan, the departmental archive of the Academy of Sciences of the Kazakh SSR, materials from periodicals, and scientific papers.
Colonial education in the Semirechensk oblast as social practices of the Russian Empire (the 2nd half of the XIX – early XX centuries)
Authors:   Al-Farabi Kazakh National University, Abdrakhim M.
Published: September 2023

In this article, the author examines the role of colonial education in the Semirechensk oblast as a social practice of the Russian Empire. Identifies the features of colonial education for the training of personnel from among the local Kazakh population for administrative affairs. He defines the role of each individual educational organizations organized by the tsarist authorities in the region, and makes an attempt to assess their contribution to the training of the corps of Kazakh officials. The author analyzes the activities of Kazakh graduates of educational institutions in the region in the context of the colonial history of the Semirechensk oblast in the late XIX- early XX centuries. In the article, a special role is given to the number of Kazakh students involved in imperial educational organizations, thereby determining the position of the local Kazakh population in relation to government education. The author also draws attention to the consequences of the training of local personnel by educational organizations of the region in the management of the region, assessing their contribution to the social life of the Kazakh nomadic society of the late XIX – early XX centuries. In conclusion, the author, based on the results of the study, gives his arguments regarding the problem of the colonial education of the tsarist government in the Semirechensk oblast, paying special attention to the case of training local personnel for the colonial administration.
Deported peoples of East Kazakhstan under the conditions of the special settlement regime
Authors:   Shakarim University, Zhankadamova G. , Akhmetova R. ,   Shakarim University, Abenova G. ,   Shakarim University
Published: September 2023

Studying the issues of forced resettlement of peoples in the USSR in the 1940s, using the example of the German and Chechen populations, their habitation in special settlement areas in the territory of Eastern Kazakhstan, and the legal status of the deported peoples, represents a pertinent historical task. The aim of the article is to elucidate the process of deportation and the living conditions of the deported ethnic groups during the wartime and post-war periods in the eastern region of Kazakhstan. Special attention is given to the analysis of the resettlement and living conditions of the special settlers, as well as the issue of their material provision. The formation of a so-called "labor army" from the special settlers is examined, where they were treated as prisoners and utilized by the state during wartime as a mobile and inexpensive workforce. The implementation of human rights and freedoms within the context of the special settlement population is analyzed. The authors have examined documents from the Documentation Center of the modern history of the Abai region and the State Archive of the East Kazakhstan Region, which has allowed for the expansion of the research aspects related to the lives of the deported population within the special settlement system.
Turkic elite of the Golden Horde
Authors:   Al-Farabi Kazakh National University, Nogaibayeva M.
Published: September 2023

The article analyzes the formation of the Turkic political elite, their features and position in the complex and large-scale management system of the Golden Horde.The administrative structure of the Golden Horde had its own characteristics in comparison with all the states that emerged after the collapse of the Mongol Empire. Including the active role of nomadic Turkic-Mongolian aristocrats in the structure of the administration of the Golden Horde and its social and political life, was reflected in the ranks of the military aristocracy (noyons, beks, emirs). In the article, the main attention in the analysis of the activities of the Turkic political elite was paid to the information of geneology, heroic epics and legends, as well as medieval written sources. Information from written sources was compared with samples of historical epics and Kazakh genealogies. The article analyzes several ways and factors that contributed to the transformation of natives of nomadic Turkic-Mongolian tribes into the political elite of the Golden Horde. The Beks, who came from local tribes, went down in history as influential figures who played a special role in the history of the Golden Horde.As a result of Kypchakization, the ideology of Genghis Khan underwent changes. However, it formed its worldview in the post-Golden Horde, including in the late period of the Kazakh Khanate, and remained in the history of our people to this day in the form of legends, epics, architectural monuments.
Methodology for ensuring information exchange of correspondents whose location is non-stationary, and the movement is accompanied by disconnecting correspondents from the network
Authors:   Military Academy of Communication Named After Marshal of the Soviet Union S. M. Budyonny, Ivanov S. A.
Published: September 2023

A method is proposed for ensuring information exchange of correspondents whose location is not stationary, and the movement is accompanied by disconnecting correspondents from the public communication network. The developed technique allows to reduce the time and increase the likelihood of the correspondent receiving data blocks intended for transmission in information directions during his absence when moving to the next place of connection to the communication network. The essence of the technique is to place traffic intended for the correspondent during its movement as close as possible to the place of its possible connection to the network: at nodes along the route (in accordance with the predicted time of passage of the sections) and at nodes / node in the area of its predicted connection. During the movement, routing is carried out on the basis of the temporary routing address table of the moving correspondent entered in the methodology, and they receive the necessary data at the place of the next connection by routing them from the most profitable nodes, determined on the basis of an additional correspondent routing address table that systematizes information about the stored on the nodes of composite data channels. An increase in the likelihood and decrease in the time the correspondent receives the stored information exchange data generated during his absence from the network at the place of the new connection is ensured by duplicating data blocks at the nodes in the correspondent's lane and their final localization at the node / nodes in the area of his next connection.
Digital mobile communication network quality research on railway by method of hierarchy analysis
Authors:   Russian University of Transport, Guskova M. F. , Nemtsov Yu. V. ,   Russian University of Transport
Published: September 2023

The article proposes a new approach to assessing the quality of the digital radio network of railway transport. The elements of the hierarchy analysis method describe such as influencing factors (criteria) and weight coefficients. The choice of criteria values is justified. For proposed calculation, the disadvantages peculiar method take into account in this research. For example, the architectures of GSM-R networks are considered. According to authors, the assessment obtained provides a more objective quality characteristic, which can be used both for the design of new and operated mobile radio networks. In conditions of limited financial possibilities, this calculation will help to find a compromise between excessive redundancy of elements and maintaining the required reliability of radio network.
Nonlinear model predictive control for servo drive control of optical-mechanical complexes based permanent-magnet synchronous motor
Authors:   Saint Petersburg Electrotechnical University, Lanh N. V. , Belov A. M. ,   Saint Petersburg Electrotechnical University
Published: September 2023

The paper proposes a method to synthesize the nonlinear discrete predictive position controller in tracking electric drive control system of optical-mechanical complexes based on permanent-magnet synchronous motor. The technique for constructing mathematical discrete nonlinear vector-matrix model of permanent-magnet synchronous motor in rotor rotating coordinate for vector control is given. The permanentmagnet synchronous motor is operated under conditions of two-mass elastic load. The steps to synthesize nonlinear predictive control algorithms by using extended linearization technique and optimization objective function with convex quadratic programming method are analyzed. Computer simulation results are carried out on MATLAB / Simulink environment. In carried out simulation, the performance of discrete predictive controller in the position loop of optical-mechanical complexes tracking control system is assessed with different kind of control signals and under the influence of external disturbance.
GIS-based information support technology for drinking water quality control
Authors:   Saint Petersburg Electrotechnical University, Kurakina N. I. , Belkin I. G. ,   Saint Petersburg Electrotechnical University
Published: September 2023

Addresses the issues of creating of a geoinformation system for assessing the quality of drinking water in a centralised domestic drinking water supply. The created system allows to systemise heterogeneous data, analyse it, and quickly represent the current environmental situation on the map. The algorithm is based on the methodology for assessing the quality improvement of drinking water, developed by Rospotrebnadzor in 2019. The algorithm allows for an integral assessment of a group of indicators, including various classes of substances (chemical, bacteriological, parasitic). The analysis is made for each observation point for a time period equal to a year. The assessment is made for each class of substances, resulting in marking water samples as high-quality or non-high-quality. Algorithm was implemented in Python using NumPy library. The resulting script represents a tool that is part of the ArcToolbox suite and runs in the ArcGIS for Desktop environment. The algorithm was tested on the existing water quality monitoring data in the Leningrad region. Thematic maps were designed based on the results of the analysis in GIS (geoinformation system) ArcGIS for Desktop. The maps clearly represent the existing ecological situation.
Data processing for the gas turbine control system diagnostics
Authors:   Saint Petersburg Electrotechnical University, Sinitсa A. M. , Shestopalov M. Yu. ,   Saint Petersburg Electrotechnical University, Imaev D. H. ,   Saint Petersburg Electrotechnical University
Published: September 2023

A system for processing diagnostic data of a gas turbine control system is considered. The procedures for obtaining diagnostic signs, identifying the symptoms of faults, and diagnosing the technical state of the control system have been implemented. It is proposed to sequentially complicate the structure of the neural network data processing system to achieve the required quality of classification of the diagnosed object technical state. An example of diagnostics of a model of a gas turbine control system proposed by W. Rowen is given.
Analysis and identification of spatially distributed control systems electromagnetic fields
Authors:   Saint Petersburg Electrotechnical University, Novozhilov I. M. , Belyaevsky O. A. ,   «Technoavtomatika» Ltd. OP, Ilyushin Yu. V. ,   Saint-Petersburg Mining University, Kukharova T. V. ,   Saint-Petersburg Mining University, Mikhailova Е. М. ,   Saint-Petersburg Mining University
Published: September 2023

In the process of aluminum production, the issue of monitoring the state of the electromagnetic field of the electrolytic cell becomes acute. In this study, the team of authors aims to consider the fundamental possibility of identifying and subsequent analysis of the electromagnetic field formed by the busbar and the anodecathode system of the cell. For this purpose, the authors analyzed the technological process of aluminum production, identified the places where the electromagnetic field is formed, and developed a hardware-software complex for identifying and analyzing the electromagnetic field. After conducting a number of experiments presented in the article, the authors confirmed the main objective of the study. Based on the results of the work done, a number of conclusions were made about the prospects for research in this area.
Local normalization of the weld made by electroslag welding
Authors:   Saint Petersburg Electrotechnical University, Tsarevsky V. V. , Blinov K. Yu. ,   Saint Petersburg Electrotechnical University, Blinov Yu. I. ,   Saint Petersburg Electrotechnical University
Published: September 2023

The accompanying local normalization of the seam made by electroslag welding (ESW) allows to bring the mechanical properties of the seam and the zone of thermal influence to the level of the base metal. The process of concomitant normalization proceeds at a temperature from 600 to 950 °C on average, in a hot mode with constant thermophysical properties of the heated metal. The distribution of the density of internal sources over the seam cross-section is considered in three approximations. An approximation is recommended with a smaller number of assumptions compared to others.
Numerical calculation of non-autonomous dynamic models with nonlinearities in the form of non-power elemental functions
Authors:   Saint Petersburg Electrotechnical University, Bychkov Yu. A. , Solovyeva E. B. ,   Saint Petersburg Electrotechnical University, Scherbakov S. V. ,   Saint Petersburg Electrotechnical University
Published: September 2023

The numerical calculation method of dynamic models with nonlinearities described by elementary non-power functions is represented. The computational difficulties in applying power series are analyzed. To overcome computational difficulties, a constructive procedure based on the analytical-numerical method of analysis developed by the authors is proposed. The numerical procedure is applicable to the models described by a system of nonlinear differential equations in the normal form of Cauchy. The proposed procedure, while preserving all the advantages of the power-series apparatus, eliminates the necessity for constructing the power-series compositions and special estimates, as well as raises the formalization of dynamic model calculations with non-power nonlinearities. The proposed numerical procedure uses the evaluations of the desired solutions and manages the boundaries of one-dimensional domains of exact solutions in order to bring them to unknown exact solutions. The advantages of the procedure are highlighted during the calculation of nonlinear autonomous dynamic model of the type «damped pendulum».
ІНТЕНСИВНІСТЬ ПРОЦЕСІВ ЗАБРУДНЕННЯ ПОВЕРХОНЬ НАГРІВУ УТИЛІЗАЦІЙНИХ КОТЛІВ ПРИ СПАЛЮВАННІ ВОДОМАЗУТНИХ ЕМУЛЬСІЙ
Authors: Корниенко Виктория Сергеевна
Published: September 2023

Approximation dependences of specific rates of pollution intensity at the main parameters influence characterizing these processes are presented. Statistical processing of research results, that displayed primary influence on metal decrease sulfur and water content of water fuel emulsion is conducted. Dependences of pollution rate from the wall temperature for 8 and 1000 hours at burning fuels and water-fuel emulsions are received. Reliability of data transfer from experimental facility on consideration of these processes in real exhaust gas boilers is estimated.
ВДОСКОНАЛЕННЯ МЕТОДІВ РОЗРАХУНКУ СЕПАРАТОРІВ ЦИКЛОННОГО ТИПУ, ЯКІ ІНТЕГРОВАНО В КОМПЛЕКС ГАЗИФІКАЦІЇ СИРОВИНИ
Authors: Алкиб Ахмет , Брега Дмитрий Андреевич , Ходак Роман Александрович
Published: September 2023

A mathematical model is proposed for calculating the parameters of cyclone separators used as the purification stage of the generator gas. The model describes the interaction of the discrete phase with the gas flow, allowing to determine the cleaning efficiency depending on the geometry of the separator, the parameters of the solid fraction and gas flow rates. The separator model providing the smallest pressure drop at high cleaning efficiency is considered. The obtained results are confirmed experimentally, the error was less than 5%.
ПРИНЦИПИ ФОРМУВАННЯ ІМПУЛЬСНОГО ПЛАЗМОВОГО СЕРЕДОВИЩА ДЛЯ ПІДВИЩЕННЯ ЗАВАДОСТІЙКОСТІ РАДІОСИГНАЛІВ
Authors: Шефер Олександр Віталійович
Published: September 2023

In article approaches of reduction the ionospheric medium influence on the propagation of electromagnetic waves is proposed. The education principles of error-correcting environment, based on the influence of artificial low-temperature plasma in the ionospheric RC layer are formed. The main criterion of sardonically low-temperature plasma habitat is determined. By the research, the way of plasma’s size increasing and a convenient form with interchangeable properties were found. This principle has applied nature for using in close proximity to the slit of spacecraft antenna.
МОДИФІКОВАНИЙ МЕТОД СХОДЖЕННЯ ПО ОПУКЛІЙ ПОВЕРХНІ ПРИ ВІДСТЕЖЕННІ ТОЧКИ МАКСИМАЛЬНОЇ ПОТУЖНОСТІ СИСТЕМИ ЕЛЕКТРОПОСТАЧАННЯ СУПУТНИКА
Authors: Jasim Ali Mahmood
Published: September 2023

The increasing of  efficiency of the satellite electrical power supply system (PSS) is important engineering task. Modern satellite PSS widely use DC-DC converters under pulse-width controlling. Existing methods of maximum power point tracking of such systems not always can  to search surely for maximum power point if there are existing  some local maximums of power. It can be if illumination of few non-oriented solar panels are different. This paper present the modeling of modified hill climbing (HC) maximum power point tracking (MPPT). The aspect of the method is choosing initial point through open circuit voltage coefficient and next tracking by using of special function through digital differentiation of measured values of output power with scaling on actual power and special empirical coefficient. The simulation results revealed robust tracking of the main peak power at a sufficiently rapid convergence.
СТІЙКЕ ОЦІНЮВАННЯ ПАРАМЕТРУ ЗСУВУ РОЗПОДІЛІВ У ЗАДАЧАХ АВТОМАТИЧНОЇ ОБРОБКИ ЗОБРАЖЕНЬ
Authors: Абрамов Сергей Клавдиевич
Published: September 2023

The task of location parameter estimation of samples distribution processed in automatic image processing tasks is considered. It is shown that the distribution law of such samples is clearly non-symmetric due to one-side heavy tail presence. Applying of known robust location parameter estimators in such conditions does not provide desirable accuracy. Therefore some new approaches based on using myriad and quantile estimators are proposed. It is shown, that the proposed solutions provide high accuracy and robustness. Recommendations about applying the proposed techniques are given.
ВИКОРИСТАННЯ ТЕПЛОТИ ГАРЯЧОЇ ВОДИ СУДНОВОГО МАЛООБЕРТОВОГО ДИЗЕЛЯ КОГЕНЕРАЦІЙНОГО ТИПУ ДЛЯ ОХОЛОДЖЕННЯ ЦИКЛОВОГО ПОВІТРЯ ЕЖЕКТОРНИМ ТЕРМОТРАНСФОРМАТОРОМ
Authors: Радченко Николай Иванович , Стахель Андрей , Богданов Николай Семенович , Щербак Юрий Георгиевич
Published: September 2023

The evaluation of the fuel efficiency and a depth of marine low speed diesel engine  cyclic air cooling by transforming into a cold of the heat of hot water produced by the heat of exhaust gas and scavenge air and spended for heating demands during cool periods of the ship performance has been done. The influence of a depth of the scavenge air heat utilization upon the effect due to its cooling was investigated. It was shown that because of low efficiency of heat transformation by refrigerant ejector chiller caused by insufficient high heat potential of heating water (temperature of about 90 °С) the fuel saving is much more less than potentially possible its value.
ОТРИМАННЯ КОНДЕНСАТУ ПРИ ОХОЛОДЖЕННІ ПОВІТРЯ НА ВХОДІ ГТУ
Authors: Радченко Андрей Николаевич , Портной Богдан Сергеевич , Прядко Александр Игоревич , Андреев Андрей Адольфович
Published: September 2023

A possibility of producing a condensate during condensing a steam in two stages cooling of cyclic air at the inlet of GTU by waste heat recovery absorption lithium bromide chiller and refrigerant ejector chiller utilizing the heat of exhaust gases was investigated. The dependence of quantity of condensate, dropped in the stage of previous air cooling at the inlet of GTU by chilled water from absorption lithium bromide chiller and in the stage of deep cooling by refrigerant ejector chiller, from heat load distribution between the stages has been analyzed. The results of calculations of dropped condensate quantity for climatic conditions of the south of Ukraine are presented.
ЗАСТОСУВАННЯ ГІПОТЕЗ КІРХГОФА-ЛЯВА ПРИ НЕЛІНІЙНОМУ ВИГИНІ ПЛАСТИН
Authors: Минтюк Виталий Борисович
Published: September 2023

Two plates were considered that follow the Kirchhoff-Love hypotheses and have John’s material formulation and the standard second order material formulation. A comparative analysis of actual strain and stress distributions was carried for the inverse problem of plate non-linear bending. It was shown that through-thickness variation of the components of plate Bio symmetric stress tensor was much closer to linear distribution than the distribution law for the components of second Piola-Kirchhoff stress tensor. Linearization of stresses with respect to the degenerated coordinate leads to practically similar values of internal moments and significantly different membrane forces.
ВИЗНАЧЕННЯ ПАРАМЕТРІВ ГОФРУ ПІД ЧАC КОМБІНОВАНОЇ ОПЕРАЦІЇ РЕДУКУВАННЯ ТА ГОФРОУТВОРЕННЯ ТРУБНИХ ЗАГОТІВОК
Authors: Борисевич Володимир Володимирович , Абухабел Мохамед Абубакер
Published: September 2023

The results of numerical modelling of corrugation forming at combination of reduction and corrugation formation of the tubular blanks are given. There were sequentially modelled initial buckling with symmetrical bulging and further plastic flow.  The results of modelling were compared for the different parameters of the technological process and for the different correlation of the initial blank dimensions. It is shown, that applied model describes corrugation formation adequately. Application of the model proposed is recommended for calculation of the parameters of the corrugation formation process with axial displacement of the material to the zone of deformation.
МАТЕМАТИЧНЕ МОДЕЛЮВАННЯ СТРУМЕНЕВОГО ВИТІКАННЯ ГАЗОПОВІТРЯНОЇ СУМІШІ З РІЗНОЮ КОНЦЕНТРАЦІЄЮ ДОМІШКИ В АТМОСФЕРУ
Authors: Скоб Юрий Алексеевич
Published: September 2023

A mathematical model of jet flow and dispersion of a polluting gas admixture of various concentrations in the surface layer of the atmosphere has been developed. To assess the environmental impact of pollution, a computational technique was used to determine the fields of probability of human impact by toxic gas based on probit analysis. Test calculations of the probability fields of human impact, which was exposed to a toxic gas, thrown into the atmosphere with different concentrations, were carried out. The results can be used to determine the environmental impact of polluting atmosphere of man-made objects.
ПРИРОДНА КЛАСИФІКАЦІЯ НОМЕНКЛАТУРИ ТЕХНОЛОГІЙ, ЩО ПЕРЕДБАЧАЮТЬ ЗАСТОСУВАННЯ РУЧНИХ ІМПУЛЬСНИХ ПРИСТРОЇВ ПРИ СКЛАДАННІ ТРАНСПОРТНИХ ЗАСОБІВ
Authors: Воробьев Юрий Анатольевич , Нечипорук Николай Васильевич , Клец Дмитрий Михайлович
Published: September 2023

The paper presents the results of a comparative analysis of the external and internal ways of systemic manifestation in the analysis of the nomenclature of production operations for assembly of vehicle structures using hand-held impulse devices based on the principles of integrity, systemic, hierarchical and development that are the main principles of any variety of systems approach. A formal basis for justifying the use of hand pulsed devices for performing the corresponding production operations for assembling vehicles has been constructed, taking into account all the relevant factors determining the effectiveness of such application, and also taking into account the mutual influence of these factors in maintaining the functionality of the whole as the basic principle of systemology. The classification model of production operations of assembly of vehicles is constructed, which satisfies the basic provisions of the theory of natural classification: the unity of the universe, hierarchy and parametrization of the elements of the classification field. Taxonomic and meromial aspects of the classification of production operations of assembly of vehicles using hand-held impulse devices are considered, as well as the principle of their duality. For the formal representation of the entire nomenclature of production operations of assembly of vehicles, the criteria of naturalness, known in the theory of natural classification, were used: hierarchy, monism, system, properties and connectivity. A categorical decision-making model for determining the type of a hand-held impulse device for implementing production operations for assembly of vehicles has been developed. A mechanism has been developed to formulate solutions for the application of a particular type of hand-held impulse device in a particular production operation of assembling a vehicle. It operates on the principle of supporting a known whole, from components, the use of which is most effective in this case. This is a manifestation of the dual nature of the solutions for choosing a hand-held impulse device – functional properties (which meet the user's needs) and supported properties (which is the internal reason for the availability of functional properties). It is shown that the relation "part-whole" and "genus-species" are gnosiological varieties of the relation of support of the functional capacity of the whole. Highlighting the characteristic features of each type of production assembly operations of vehicles using hand-held impulse devices has shown that it is the external system (system-class) that specifies the essence category for them.
РОБОТИЗАЦІЯ УПРАВЛІННЯ ПРОСТОРОВИМ ПОЛОЖЕННЯМ ОБ'ЄКТІВ ПРИ ВИРОБНИЦТВІ ТА ЕКСПЛУАТАЦІЇ ЛІТАЛЬНИХ АПАРАТІВ
Authors: Сахаров Денис Юрьевич
Published: September 2023

The variety of manufacturing processes for industrial engineering products requires high accuracy of their manufacturing and assembling methods to be satisfied. Thus, automated manipulators or special positioning devices can be used for further improvement of assembling efficiency. For instance, the positioning algorithms with high accuracy are implemented for structural elements within the method of assembly-free concept in aircraft building.In order to find a clue solution for the problem of accurate coordinate positioning, it is necessary to determine the rotation angles and linear displacements of the object during the transition from the initial position to the final state, and to calculate the displacement values of the positioning drives based on them. From the other side, the positioning of an industrial manipulator on a physical object in real time mode requires the development of an adaptive mathematical algorithm for determining the rotation angles and linear movements of the manipulator links, thus the development of a response mechanism from which the data required for calculating the trajectory of motion can be obtained.A mathematical model of the positioning of the normal actuator robotic industrial manipulator on the complex curved surface of aircraft panels, which calculation is based on the rotation matrix with respect to a fixed point on a curved surface expressed by Euler angles instead of the classical differentiation coordinate positions of the points in time for linearization displacements handling system for small changes in the coordinates of the individual nodes of the mechanism that allows to adaptive run-conductive program execution device and will provide an opportunity to define the normal to the curved surface in real time.Based on the proposed calculation method, numerical algorithm for manipulator handling can be developed. This software will allow to calculate the necessary values of the movements of the manipulator drives, which eliminates the need for a large number of iterations in the coordinate positioning process. The described method can significantly improve the performance of assembly-free concept and docking operations in aircraft building.
ГРАНИЧНИЙ СТАН СЖАТОЇ ПЛАСТИНИ З МАТЕРІАЛУ ПЕРШОГО ПОРЯДКУ
Authors: Минтюк Виталий Борисович
Published: September 2023

The post-buckling of a uniformly compressed plate was considered. An analytical-numerical solution was obtained using the Rayleigh-Ritz method. Legendre polynomials and their linear combinations were used as basis functions. The resolving equations were obtained from the principle of the stationarity of the total potential energy, in which the elastic potential is a strain energy density function of the semilinear material. This hyperelastic material means a linear binding between the right stretch tensor (right Biot-stretch tensors) and the conjugate symmetric tensor of stresses Biot (Jaumann stress) pertaining to the Seth-Hill family. To reduce the problem to a two-dimensional (plane stressed state), Kirchhoff-Love's classical hypotheses were used. The components of the right stretch tensor in the reference Cartesian coordinate system were written explicitly in terms of the derivatives of the three displacement functions. To do this, the deformation gradient tensor of the deformed middle surface, the right Cauchy–Green deformation tensor, the right stretch tensor and the proper orthogonal rotation tensor were first constructed. After this, the right tensor of the multiplicity of elongations for an equidistant surface was similarly constructed. After this, the right tensor of elongations was constructed similarly for a surface that is located from a deformed middle surface to a small distance z. The components of this tensor were expanded in a Taylor series about the neglected coordinate z = 0 and its linear part were singled out. The algorithm for solving the problem, which includes the implementation of the Rayleigh-Ritz method and Newton's method, was performed using the C ++ programming language. Diagrams of equilibrium states were constructed and graphs of the change in the total potential energy were presented. Two branches of equilibrium states, which begin with the first and second critical Euler loads, were traced, and these branches, obtained by the Föppl–von Kármán plate theory, are also given. It has been shown that Föppl–von Kármán plate theory gives a satisfactory result only near the bifurcation point and can lead to a qualitatively incorrect result. It was demonstrated that post-buckling for uniformly compressed plates, jumps from one form of equilibrium to another (as for shells) are observed. To determine the limiting value of the compressive load from the condition of a minimum of the total potential energy was proposed.
ОЦІНКА ЧИСЛА ПРОСТОРОВО-ЧАСОВИХ СИГНАЛІВ ПРИ БАГАТОКАНАЛЬНОМУ ПРИЙОМІ
Authors: Абрамов Александр Дмитриевич , Жила Семён Сергеевич , Москаленко Татьяна Игоревна , Нгуен Ван Хуон
Published: September 2023

The analysis of the first stage of ensuring the selectivity of multi-channel radio engineering systems under conditions of a parametrically uncertain interference environment, the detection of spatial signals with varying intensity and unknown angular parameters, is performed.Within the theory of multi-alternative solutions, using the likelihood ratio criterion, a method is proposed for solving the problem of estimating the number of space-time signals with unknown angular parameters in the indicated noise conditions, the starting point of which is the likelihood ratio criterion.On the basis of the theory of multi-alternative solutions, a decision rule was synthesized in favor of any of the proposed hypotheses on the number of orthogonal space-time signals with the above-mentioned model characteristics, which uses standard computational operations and allows to control the error probability of the first kind.It is proved that for an unknown character of the change in the intensity of orthogonal space-time signals, it is advisable to focus on performing analysis in an interference subspace.Distinctive feature of the synthesized decision rule: critical statistics are formed on the basis of the eigenvalues of the correlation matrix of observations under multichannel reception conditions. The analysis showed that the statistical distribution density is tabulated, which made it possible to "priori" set the required value of the error of the first kind.Attestation of the synthesized test − the decision rules in favor of the proposed hypothesis about the corresponding number of orthogonal space-time signals contained in multichannel observations, was carried out in two modes: the first - the change in the intensity of the signals was noise-like, the second - the envelope of each of the signals remained constant for a time interval. The significance level was set at 0.01. Based on the results of the simulation, a comparative analysis of the number of correct solutions (based on the implementation of the corresponding hypothesis on the number of space-time signals) on the signal-to-noise ratio in power for a given angular parameter spacing was carried out. Elements of selective correlation in the modeling process were estimated for 100 independent time samples.The results of the numerical simulation confirm the conclusions of the theoretical studies.