bluuebunny/crossref_metadata_2025 huggingface dataset:
Study of the patterns of ozone generation using the top oxygen lance under various technological blowing conditions
Authors:   Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Semykin S. I. , Golub T. S. ,   Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Dudchenko S. O. ,   Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Vakulchuk V. V. ,   Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Prokopenko P. H. ,   Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine
Published: January 2025

The basic oxygen furnace process of smelting iron-carbon intermediate product is an important stage in the production of steels of various grades. The heart of this process is the top oxygen blowing, which ensures the processing of cast iron into steel. It is largely responsible for the technological and quality indicators of both the process itself and the result - the liquid metal intermediate product. Despite the sufficient time of existence of the process and the different depth of its research, rapid changes in technological and environmental indicators of modernity determine the constantly high relevance of developments that, without significant capital investments, will allow to intensify the converting process without losing other important technological indicators. Among these is the idea of using ozone as an admixture to the main oxygen flow, the molecules of which are more active oxidants. The paper presents the results of a full-scale physical bench study of the features of ozone generation by a high-voltage brush-type electric discharge when blowing through the top oxygen lance with one nozzle depending on the technological parameters of the blowout: the pressure of the blowout gas, the type of insulation on the electrodes, and the length of the discharge gap. The ozone productivity was chosen as the indicator, which was determined at a certain point of the oxygen jet by measuring its concentration using a special gas analyzer. An important feature is that the discharge was created directly at the outlet of the blowout lance to create the largest amount of ozone in the gas flow. Analysis of the obtained research results allowed us to establish that the ozone generation productivity nonlinearly depends on the pressure of the blowout gas and the size of the discharge gap between the electrodes that create the high-voltage discharge. The maxima correspond to a pressure of 0.15 MPa and a discharge gap length of approximately 3 calibers of the blowout nozzle. Also, ceramic insulation has the best ozone generation performance, that probably additionally produces ozone on its surface. The proposed method can be used to activate exchange processes during basic oxygen furnace process.
Improving the design of the tundish of the continuous casting machine for round billets production using numerical simulation
Authors:   Ukrainian State University of Science and Technologies, Shvets O. V. , Konovodov D. V. ,   Ukrainian State University of Science and Technologies, Petrov O. D. ,   LLC "INTERPIPE UKRAINE", Lisnycha T. Y. ,   LLC "INTERPIPE UKRAINE"
Published: January 2025

As the requirements to fineness of continuously cast round billets used in manufacture of critical products (railway wheels, special purpose pipes, etc.) demonstrate substantial growth, comprehensive technological solutions are needed to improve the quality of steel, primarily by reducing the number and size of non-metallic inclusions. Herewith, the tundish as the last unit with refractory lining plays a special role in this by removing inclusions through optimization of the liquid steel flows. Since the metal flow pattern is the basic component for productivity of continuous casting tundishes, the purpose of this study was to evaluate and optimize the hydrodynamics inside the four-strand tundish by using a comprehensive approach to changing its internal geometry. To ensure optimal conditions for removal of non-metallic inclusions in the tundish, it is necessary first of all to ensure long-term contact of metal and slag both by directing the metal flows to the metal-slag interface surface and by increasing the time of metal staying in the tundish. In regulation of the metal flows inside the tundish the main focus has been historically on the design and technological features of the impact pads in the zone of metal inflow from the steel ladle to reduce turbulent flows. Therefore, in the conducted studies, the attention was mainly paid to evaluating changes in the liquid steel flows inside the tundish through the use of other additional flow "modifiers" such as skimmers and baffles. It should be noted that in addition to the effect on the distribution of flows, an assessment was made of the possible impact of changes on prevention of excessive erosion of the refractory lining of the tundish. The evaluation was performed using the finite element numerical simulation method on the commercial software Thercast from Transvalor (France). The results of the actual evaluation of non-metallic inclusions in the finished products showed a substantial reduction in the interval of the existing inclusions from the initial 50-100 microns to 20-50 microns, with a stable trend towards a substantial decrease in the number of inclusions after the changes were implemented.
System for automatic front ends control of thick plates by asymmetric hot rolling
Authors:   Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Prykhodko I. Yu. , Krot P. V. ,   Wroclaw University of Science and Technology, Raznosilin V. V. ,   Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Vorobei S. O. ,   Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Klemeshov Ye. S. ,   Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Malygin M. S. ,   Liberty Częstochowa, Semenov I. A. ,   Liberty Częstochowa, Matyjaszczyk K. ,   Liberty Częstochowa
Published: January 2025

Research has been carried out and the problem of uncontrolled front ends bending of thick sheets in a hot rolling mill has been solved. A set of main factors has been determined that explain the reasons for the formation of the front end bending of the sheets during normal rolling. With the use of finite element modeling, a method of adequate influence on the front-end plate curvature by the mismatch of the drives speed during the capture period is developed, depending on the entry plate thickness and the form factor of the deformation zone. The following influencing factors are considered: the "run length" of the faster roll over the sheet surface in the neutral section; the difference of contact stresses on the rolls; the neutral angles displacement and metal forward slip in the contacts with both rolls. Based on the established regularities, a control model was built. The model is implemented in the automatic control system of the industrial plate hot rolling mill 3600 of Huta Częstochowa (Poland). Leveling of the front ends of thick plates is realized by a controlled high-speed asymmetry of the rolling process during the sheets biting by the rolls, which made it possible to eliminate of the front end curvature of the sheets and increase the output product quality. The number of sheets with curvature, which requires re-hot straightening, has been reduced by 25%.
Development of methods for diagnosing the technical condition of rolling mill equipment in transient operating modes
Authors:   Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Verenev V. V.
Published: January 2025

Several methods for diagnosing rolling equipment in transient operating modes are presented, primarily when the strip is captured by the rolls and indicators - the time of delay in the reaction of sections, correlation fields, and the oscillation period. The directions of development and search for new methods are considered, examples of using the features of rolling and equipment operation for diagnostic purposes are given.
Optimization of the work mode of the output side of minor mills
Authors:   Ukrainian State University of Science and Technology, Yehorov O. P. , Rybalchenko M. O. ,   Ukrainian State University of Science and Technology, Manachyn I. O. ,   Ukrainian State University of Science and Technology,   Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Mikhailovskyi M. V. ,   Ukrainian State University of Science and Technology
Published: January 2025

Rolled products are produced from carbon, structural and low-alloy grades of steel. After rolling on the output side of the mill, the rolled stock, cut into bars, is cooled on a rack cooler, then collected in bundles, transported to the cold cutting shears. With scissors, it is cut into measuring or standard bars. The cut bars are collected in the pockets of the scissor conveyor belt, weighed, tied into bundles and fed to the warehouse of finished products by an electric overhead crane. One of the important indicators of the mill's operation is the rolling rate. Ensuring the maximum possible rolling speed, based on the operation of the technological equipment, reduces the cost of finished products due to, for example, a reduction in energy consumption when the speed is reduced or technological downtimes. The work of transporting rolled strips collected in a package by a conveyor belt to cold cutting shears is considered. The weight of a package of stripes varies significantly depending on their length and number. The braking distance of the transported package also depends on this. The cutting of the package with cold cutting scissors is carried out under a stop, so the package is brought to them at a crawling speed. The longer the path, the greater the time spent cutting, which reduces the overall rolling rate. The developed system makes it possible to determine the acceleration and deceleration parameters of the roller drive during the transport of the package by the roller conveyor to the cold cutting shears for the first cleaning cut. The package can have strips of different lengths from start to finish, depending on the cutting algorithm. Therefore, the path of acceleration and deceleration of the package for cutting on cold cutting shears can be different. However, package moments of inertia and static moments affect the acceleration and deceleration processes equally. Determining the acceleration time and path, you can also determine the deceleration path. The ratio of the acceleration path to the deceleration path obtained for the cleaning cut is used to determine the deceleration time for the next cut. Each time the roller conveyor is turned on, this ratio is refined. The conducted simulation modeling of the system operation showed that in this way it is possible to accurately set the package in front of the stop of the scissors and reduce the path of movement of the bundle of rods at crawling speed to almost zero, and thereby increase the productivity of this section.
Influence of initial microstructure of Al-Mg-Sc alloy on defect formation in hot-rolled strips
Authors:   Ukrainian State University of Science and Technologies, Konovodov D. V. , Andreiev V. V. ,   Ukrainian State University of Science and Technologies, Maslov D. O. ,   Ukrainian State University of Science and Technologies
Published: January 2025

Ensuring operational reliability and durability of products remains a pressing challenge in modern transportation manufacturing. The primary trend in the development of transportation technologies is increasing the performance requirements of materials. This trend focuses on reducing material consumption and product weight. This study focuses on Al-Mg-Sc aluminum alloys, a class of materials widely and successfully applied in engineering. The high specific strength of aluminum alloys enhances load-carrying capacity and reduces operational costs of transportation vehicles. Moreover, the high corrosion resistance of these materials extends service life and broadens the range of transportable goods, including highly aggressive liquids and gases. Al-Mg-Sc alloys exhibit high strength, excellent corrosion resistance, and good weldability. In modern metallurgical production, a significant proportion of semi-finished products and components made from these alloys are produced through metal forming processes. This paper examines rolling as the most productive metal forming method. Metal forming processes are employed in the manufacture of critical parts due to their ability to achieve superior mechanical properties. However, ensuring high mechanical and operational properties depends on the uniformity and extent of the material's structural refinement. This, in turn, is influenced by rolling process parameters such as degree and rate of deformation, diagrams of principal stresses and strains, processing temperature range, cooling rate, and more. Al-Mg-Sc alloys with a magnesium content of 5-6% have relatively low plasticity, complicating plastic deformation. It is generally believed that creating the most favorable deformation conditions is crucial for successful hot plastic deformation. Experimental research presented in this study indicates that, in addition to favorable deformation conditions, the microstructure of the initial billet significantly affects the quality of the final product. This work analyzes the microstructure of aluminum alloy 01570 samples. The analysis reveals specific features in the initial billet's microstructure. Comparing surface defects in strips after hot rolling with metallographic analysis results from samples taken before and after rolling suggests a clear relationship between the initial microstructure of the aluminum alloy and the formation of these defects.
Gas blow mode of blowing period of blast furnaces
Authors:   Dniprovsky State Technical University, Kriachko H. Yu. , Sigarev Ye. M. ,   Dniprovsky State Technical University
Published: January 2025

The purpose of the work is to generalize the experience of varying the gas-blowing parameters in the blowing periods of blast furnaces and to develop recommendations for further improvement of the gas-dynamic blowing mode. The data on the change in the gas and dust regime of the blasting periods of blast furnaces of different volumes under different raw material and operating conditions have been systematized. It was established that at a lower rate of growth of the blowing flow in the blowing period, a higher blowing temperature in it contributes to the complication of the gas dynamics of the blast furnace process, which is evidenced by the simultaneous increase in the blowing pressure, pressure drop, and gas pressure on the furnace, as a compensator of these complications. Offered within the limits of the daily blowing period with output to the final blowing consumption of up to 1.0 Vd/Vcor·min in the second half-period of blowing, increase the number of one-time blowing additives with a decrease in their size to the limits of real use. It is justified to give preference to increasing the blowing flow before increasing its temperature in the blowing period, since both parameters have a competitive effect on the gas dynamics of the blast furnace process with significantly different effects on the structuring of the charge column. It has been proven that the common recommendation to blow the furnace on all nozzles of the working diameter does not correspond to the technology of conducting the blowing period, taking into account the low total initial cost of blowing to create active nozzle foci. Inclusion of the proposed recommendations in the practice of starting blast furnaces will make it possible to reach the planned parameters of the gas dynamic regime in a short period of the blowing period.
Analysis of the problems of creating flat multilayer bimetallic compositions and ways to solve them
Authors:   Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Klemeshov Ye. S. , Prykhodko I. Yu. ,   Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine, Merkulov O. Ye. ,   Iron and Steel Institute of Z. I. Nekrasov National Academy of Sciences of Ukraine
Published: January 2025

One of the trends in modern production is the search for materials capable of replacing steel, while gaining advantages and eliminating shortcomings in the characteristics and properties of products. Such material is bimetallic and multilayer composites. This work presents an analysis of the current state of developments in the production of bimetallic and multilayer composites. First of all, emphasis is placed on the manufacturing technologies of bimetallic composites, which are divided into two categories: with the use of deformation and without the use of deformation. It was concluded that rolling is the most widespread, simplest and effective method of obtaining bimetals and multilayer composite materials. The analysis of modern research trends in the field of bimetal production showed that the majority of works are devoted to the calculation of the energy parameters of the rolling process, deformation parameters and the state of the surface of the samples for obtaining a joint, the mechanical properties of composite products with a diverse combination of steels and non-ferrous metals, the study of the structure of the samples in place with unity Another important issue is the determination of the strength of the connection, which is currently estimated when calculating the stresses in the center of deformation or based on experimental and statistical data of the total degree of deformation. Nowadays, computer modeling is quite often used in calculations, which allows simulating the process of simultaneous deformation of two or more layers of metal, but it does not allow calculating the possibility of connecting the layers. In the work, a mathematical model for obtaining a multilayer bimetallic composition Ag-Cu-Ag by rolling method was developed, which allows to evaluate the influence of the parameters of the deformation process on the stress state of the metal layers. Based on the analysis of modern developments, it was determined that insufficient attention was paid to the issue of calculation and evaluation of the connection of layers, therefore, a criterion for the connection of metal layers was formulated. The expediency of creating a classification of ranges of criterion values for assessing the degree of strength of the connection of layers of bimetallic products is shown.
The application of the CoilBox intermediate rewinding device for reducing energy consumption and improving the efficiency of rolling production in continuous sheet mills
Authors:   Primetals Technologies Ukraine LLC, Tsikoliia A. Z. ,   Ukrainian State University of Science and Technologies, Nykytiuk M. V. ,   Primetals Technologies Ukraine LLC, Kononov D. O. ,   Ukrainian State University of Science and Technologies
Published: January 2025

This study investigates the effectiveness of the intermediate rewinding device CoilBox, which plays a crucial role in preserving the thermal properties of metal rolling. The CoilBox technology, developed by Stelco Incorporated in 1969, involves the high-speed coiling of hot strip and subsequent uncoiling before the finishing mill group. This approach reduces heat losses through radiation and maintains a uniform temperature profile throughout the rolling process. Throughout its development and refinement, numerous tests have confirmed CoilBox's advantages over traditional rolling systems. Initial prototypes were tested at the Hilton Works hot strip mill in Hamilton (1972-1973) and the Westernport mill in Australia (1979). After a successful commercial implementation at the Bochum hot strip mill in 1982, CoilBox technology gained widespread adoption, with 50 installations established worldwide by 1978. The use of CoilBox significantly impacts the enhancement of the rolling process's efficiency. Analysis shows a reduction in power consumption and a decrease in the average moment to a similar extent. This results in a reduction in temperature variation along the strip, leading to a decrease in thickness differences in the finished product. The stability of the rolling process is also confirmed by a reduction in the standard deviation of the moment in most mill stands. CoilBox not only improves production efficiency but also aligns with sustainable development principles. Lower energy consumption and reduced CO2 emissions contribute to the ecological sustainability of production processes. The CoilBox technology enables the expansion of product range, increases the share of hot-rolled coils, and reduces energy costs, making it an essential tool for improving product quality and reducing the environmental impact of manufacturing.
Regularities of phase and structural transformation in the Fe-Cr-Ti-C system during carburization
Authors:   Ukrainian State University of Science and Technology, Movchan O. V. , Chornoivanenko K. O. ,   Ukrainian State University of Science and Technology
Published: January 2025

Diffusion carburization of ferrite alloyed with carbide-forming stabilizing ferrite components under certain conditions leads to the cooperative disintegration of ferrite into austenite and special carbide with the formation of eutectoid-like plate-rod colonies. Studying the conditions for the formation of austenite-carbide colonies shows that the driving force behind the growth of colonies is the influx of carbon. At the same time, it is necessary that carburization of ferrite simultaneously leads to austenitization and carbide formation. The analysis of the diagrams of the composition of the Fe-Cr-C and Fe-Ti-C experimental systems with different contents of carbide-forming elements showed that at a certain concentration and temperature, cooperative disintegration of ferrite into austenite and carbides is possible. The regularities of structure formation and phase transformations in the surface layer during carburization were determined depending on the processing parameters. The temperature interval for the formation of austenite-carbide colonial structures, similar to eutectoid ones, which are a natural composite material, during carburization of highly alloyed iron alloys of the Fe-Cr-Ti-C system as a result of joint and simultaneous carbide formation and recrystallization has been established. Complex research methods established the transformation patterns of the α → γ transformation front. It is shown that the formation of the cellular recrystallization front is carried out under the influence of concentration gradients caused by the redistribution of the main alloying element in front of the transformation front. Electron microscopic studies of the austenite-carbide colonies were conducted, which showed that the austenite-carbide colony is a single bicrystal. Martensitic plates are mainly oriented parallel to the carbide rods, which have a cubic facet. Joint electronograms of carbide and austenite showed the presence of an orientational relationship between these phases.
Physicochemical and sensory evaluation of pumpkin-based instant porridge with mocaf and cowpea flour
Authors: Slamet Agus , Kanetro Bayu , Purwaningsih Heni
Published: January 2025

Functional food is currently a necessity along with the emergence of several degenerative diseases. These degenerative diseases, including coronary heart disease, diabetes, and hypercholesterolemia are the leading causes of death today. This study aims to produce instant porridge mixed with mocaf, pumpkin, and cowpea flour that is preferred by panelists and has the potential as a functional food. Instant porridge mixed with mocaf, pumpkin, and cowpea flour with variations; 1:1:1, 1:2:1, and 1:3:1. The drying temperature variations used were 130oC, 140oC, and150oC. The resulting instant porridge was tested for physical properties including: bulk density, yield, water and oil absorption, water absorption index, and colour. The level of preference was tested based on: colour, aroma, taste, viscosity, and overall preference. The instant porridge most preferred by panelists was analyzed chemically: water content, ash, protein, fat, carbohydrate by different, phenol, beta carotene, and antioxidant activity. Among all the samples tested in this study, the instant porridge that was most preferred by the panelists was the 1:3:1 variation at a drying temperature of 130oC, and has the potential to serve as a functional food.
The Role of Educational Level and Gender in Vocational Journey: A Comparative Perspective on the Abilities and Values of High School and University Students
Authors: Söner Osman , Tunç Furkan
Published: January 2025

This study aims to examine the vocational values of high school and private foundation university students in the Küçükçekmece district of Istanbul province based on gender and educational level. Utilizing a survey model, the research seeks to generalize students' vocational values and abilities within different educational settings. The study sample consists of a total of 616 high school students and 784 university students, randomly selected from three different high schools and a private foundation university. Participants exhibit diversity in demographic characteristics, including gender, type of school/faculty, grade level, and monthly income. Data were collected using the Personal Information Form, Vocational Values Inventory, and the Self-Assessment Inventory-Abilities scales. The findings indicate significant differences between high school and university students regarding vocational values and abilities. University students place greater emphasis on friendship, health, creativity, and helping, whereas high school students prioritize financial gain. In terms of gender differences, female students assign more importance to friendship, financial gain, and health values, while male students prioritize physical and creative values. Verbal ability was found to be higher among university students, while no significant differences were observed in numerical and spatial abilities. These findings highlight how vocational values and abilities vary between high school and university students based on gender and education level.
Career Anxiety and Perceptions of School Climate: A Study on Adolescents’ Future Plans
Authors: Kuloğlu Ayşenur , Özer Merve , Tutuş Fatma
Published: January 2025

Adolescence marks the beginning of career contemplation and planning for many individuals. During this process, career-related anxiety may arise due to a variety of personal and environmental factors. For high school students, their career plans and anxieties can be shaped by influences from teachers, administrators, and peers. In this sense, this study tried to examine the potential relationship between adolescents’ career anxieties and their school climate perceptions. The sample consisted of 628 high school students from Afşin, Kahramanmaraş. Data were collected using the "Personal Information Form," the "Career Anxiety Scale," and the "School Climate Scale." Descriptive analysis was used to investigate participants’ career anxieties and school climate perceptions across different variables, while correlation analysis was performed to examine the relationship between these two factors. The findings indicated that the participants experienced moderate levels of career anxiety and school climate perception, with variations observed across different variables. However, the correlation analysis revealed no significant relationship between the participants’ career anxieties and their school climate perceptions.
The Impact of Fuel Subsidy Removal on the Nigerian Economy
Authors: J. M. Amangwai, , N. Amos,
Published: January 2025

This paper traces the history of the discovery of petroleum (oil) in commercial quantities in Nigeria as well as the evolution of fuel subsidy in the country. The paper also attempts to look at the volume of money spent on fuel subsidy by successive governments, especially the last two administrations–of Presidents Goodluck Ebele Jonathan and Muhammadu Buhari. The paper examines the removal of fuel subsidy on May 29, 2023, by the present administration–President Bola Ahmed Tinubu, and looks at the positive and negative impacts of such action. The paper concludes that the objective of fuel subsidy removal in the country has not been achieved. Then, it provides the way forward in mitigating the effects that accompany fuel subsidy removal.
Construction of Graduate Student Quality Policy System Based on NMIFS Algorithm
Authors: Lu Wang
Published: January 2025

In order to improve the graduate matriculate quality in the Internet era, this paper analyzes the policy system for ensuring the graduate matriculate quality in the Internet era, and improves the policy system for postgraduate student quality by combining intelligent data processing methods. This paper proposes a strategy based on NMIFS dimensionality reduction and threshold optimization. Moreover, this paper analyzes the impact of large-scale cubes on the construction of isolated trees, and proposes a dimensionality reduction strategy based on the NMIFS algorithm. In addition, this paper conducts a dimensionality reduction strategy comparison experiment on the four algorithms in projection transformation and feature selection, which verifies the effectiveness of the NMIFS feature selection dimensionality reduction strategy for the construction of isolated forests. The experimental study verifies that the policy system of graduate matriculate quality proposed in this paper can effectively improve the graduate matriculate quality.
Theoretical Construction of Language Education Safety Based on Artificial Intelligence Multimodal Discourse Analysis Theory
Authors: Ping Lu
Published: January 2025

The world has entered the era of cultural multipolarization and economic globalization. As a global common English, it is particularly important. Based on the theory of multimodal discourse analysis, this paper studies the construction of natural ecological model of British and American literary education. This study shows that in the past, domestic British and American literature education often paid attention to its instrumentality and ignored its internal cultural connotation. As a result, the domestic British and American literature education is boring and rigid. In this way, students' lack of interest makes English teaching more and more difficult. Through the research on the means and principles of cross-cultural awareness, this paper improves students' cross-cultural awareness. The experimental results show that cross-cultural integration based on multimodal discourse analysis theory can make British and American literature education play a better role.
Construction of Information Security Platform for University Teaching Staff Combined with Data Collection
Authors: Xiangjun Xia
Published: January 2025

The teaching staff management information system is an important guarantee to realize the scientific and standardized management of teacher staffs in colleges and universities, and it plays a very important role in the process of school information construction. In order to improve the data processing effect of the construction of teaching staff in colleges and universities and improve the rational configuration of teaching staff, this paper combines intelligent data clustering method to process the data of teaching staffs in colleges and universities, and proposes a teacher evaluation method based on fuzzy C-means clustering algorithm. The purpose is to dig out all aspects of factors that affect teachers' teaching ability, so as to evaluate teachers in many aspects and objectively. Secondly, this paper proposes a teaching staff allocation model, and uses the discrete binary particle swarm optimization algorithm to optimize the solution. Finally, this paper validates the effectiveness of the proposed method through experimental research, so we can use this model for auxiliary data processing in the follow-up construction of teaching staff in colleges and universities.
Modeling of PV Power Based on Weather Random Sampling and Fluctuation Characteristics Simulation
Authors: Zhenzhen Wang
Published: January 2025

In response to the significant fluctuations in PV power generation due to weather changes, this paper proposes a time-series modeling approach. The proposed method integrates random weather sampling with fluctuation characteristic simulation techniques, effectively characterizing the uncertainty of PV power. Initially, the characteristics and the fluctuation of PV power under different weather conditions are analyzed, and the impact of weather factors on PV power fluctuations is quantified using the “no-shade coefficient”. Subsequently, based on statistical analysis of historical weather data, a Markov chain-based weather type transition model is constructed to accurately capture the transition patterns between weather types. On this foundation, combined with the Gaussian Mixture Model (GMM) and the Normal Distribution, mean value and fluctuation value models of the PV power no-shade coefficient are established, respectively. These two models collectively provide a detailed depiction of PV power fluctuations. Finally, the validity and accuracy of the proposed modeling method are verified using actual operational data from a PV power station in Wuqing, Tianjin. This method provides a modeling basis and algorithmic support for the new electricity system planning and production process simulation.
Hotspot and Development Trend of University Education Research in China: Bibliometrics and Big Data Analysis Based on University Pedagogy
Authors: Hongxia Song
Published: January 2025

Using big data analysis has become an important method in scientific research today.In the past 30 years, China's higher education cause has developed vigorously.This paper uses the software computer space to conduct a measurement and qualitative analysis of changes in the number of published articles, publishing institutions, authors, high citations, research hotspots and hotspots in university educational science over the past 30 years.The results show that the number of articles published in the Journal of University Education Science is declining, with Hunan University, Hunan Normal University, Xiamen University and Central South University as the main contributing articles. The journal has formed a stable group of core authors.The journal serves as a reprint database of the People's Congress.Teaching reform, university, college students, teaching content, academic freedom, college, socialism, talent training, academic annual conference, university teachers, college entrance examination reform and so on are the main contents of "university education science".Through big data analysis, it is found that the influence and discourse power of university education science have been significantly enhanced in the academic circle, and it has become an important hub of academic and cultural exchanges in the field of higher education in China, and has made a significant contribution to the theoretical exploration of promoting the construction of a strong education country in China.
Experimental Study on Impermeability of Recycled Concrete and Its Security Measures
Authors: Faming Liu
Published: January 2025

Recycled concrete specimens were prepared according to different fly ash content and water-cement ratio. These specimens were respectively cured for 28d, 60d and 90d.The influence of water-cement ratio, concrete age and fly ash content on the impermeability of recycled concrete was researched through impermeability experiment. On equal terms, the result shows that the average seepage height of recycled concrete is higher than common concrete. The average seepage height increases with the increasing of water-cement ratio, but decreases with the increasing of fly ash content and concrete age. With the increasing of concrete age, the average seepage height of fly ash recycled concrete is higher than that without fly ash. Concrete age and fly ash are play a double role in improving impermeability of recycled concrete. Average seepage height of recycled concrete after treatment is much lower than untreated concrete, and the average seepage height of recycled concrete which age is 60d decreases the biggest. Proper reduction of water-cement ratio and fly ash content, increasing concrete age, pickling of recycled aggregate and other measures can effectively improve recycled concrete impermeability. Fly ash improve impermeability of recycled concrete is better than other three factors.
Research on Potential Training Effects Based on Wearable Embedded Wireless Communication Devices in Sports Training
Authors: Qi Lu
Published: January 2025

In recent years, sports culture has gradually come closer to life. It has become a top priority to improve the effectiveness of sports from teenagers and reserve power for the Olympic Games. Wearable embedded wireless communication equipment can effectively analyze sports training from a scientific point of view. The idea of "digital sports" is gradually introduced into sports training, and with the increasingly mature information technology and network technology, the posture information is monitored by sensors, so that training and material selection parameters are scientific and digital. A wearable embedded digital sports training system is designed, and a solutions is put forward aiming at the accuracy of training actions, scientific training methods and early warning analysis of joint injuries. The experimental results show that the system can achieve the purpose of providing training schemes for athletes.
Research on Improving the Communication Security of Flexible DC Converter Valve Control System using Advanced Signal Processing Algorithms
Authors: Guohua Zhang
Published: January 2025

To address the interference challenges in complex electromagnetic environments, this paper introduces an innovative solution leveraging a hybrid LMS-FFT algorithm aimed at enhancing the system's communication security. Initially, this study thoroughly examines the operating structure and communication principles of the flexible DC converter valve control device, and systematically investigates the limitations faced by current technologies in intricate electromagnetic conditions. By combining the adaptive filtering algorithm LMS (least mean square) with the frequency domain analysis method FFT (fast Fourier transform), a hybrid modeling technique is developed. This approach effectively mitigates noise interference in both the time and frequency domains. Through comparative simulations of the LMS algorithm, FFT algorithm, and the LMS-FFT hybrid algorithm, the results reveal that the LMS-FFT hybrid approach demonstrates substantial improvements in terms of signal processing precision, convergence speed, and anti-interference capability, particularly in challenging electromagnetic environments. Experimental results further confirm the algorithm's ability to enhance the communication security and reliability of the flexible DC converter valve control system, suggesting significant potential for practical application across a variety of scenarios.
AI-Powered Accessibility Design Education for Visual Communication Students
Authors: Qi Yang
Published: January 2025

This study investigates the integration of AI-powered tools into accessibility design education for visual communication students. The aim is to assess how AI can enhance students' understanding of accessibility principles, improve the quality of their design work, and increase engagement with the learning process. The study involved a curriculum incorporating AI tools to evaluate key accessibility factors such as contrast ratios, readability, and screen reader compatibility. Pretest and posttest assessments, design project evaluations, and student surveys were used to measure knowledge improvement, design quality, and engagement. The results indicate a significant 32.7% improvement in students' knowledge of accessibility principles and a 24.8-point increase in design accessibility scores. Additionally, student engagement significantly improved, reflecting high satisfaction with the AI tools. Regression analysis revealed a positive correlation between the time spent using AI tools and the improvement in design quality. These findings suggest that AI-powered tools can effectively support the development of accessibility skills in design education, providing students with real-time feedback and fostering a more interactive and inclusive learning experience. This study contributes to the growing body of research on the application of AI in design education and highlights the potential of AI tools to transform accessibility education. The findings underscore the importance of preparing future designers to create more accessible and inclusive digital content, with AI playing a pivotal role in this process.
Analysis of Resistance Reduction via Support Vector Regression and Experiment on a Submerged Floating Vehicle Fitted with an Air Curtain Traversing Deep Soft Terrains
Authors: Chuan Huang
Published: January 2025

To improve the driving efficiency of submerged floating vehicles (SFVs) in deep soft terrains, the effect of an active air curtain method on the reduction and optimization of sliding resistance of a floating device was explored. The sliding resistance reduction principle of the air curtain was introduced, then, the resistance was analyzed. The soil bin experiment for air curtain resistance reduction test was built. The orthogonal tests were employed to ascertain the influence of the air curtain, ground contact pressure, sliding velocity, and soil moisture content upon the sliding resistance. The results show that the resistance with air curtain is less than that without air curtain, and the resistance reduction rate up to 11.17%. The resistance augments in tandem with the elevation of the ground contact pressure and the sliding velocity. When the soil moisture content approximates the liquid limit, the rate of resistance reduction reaches its peak. Furthermore, a support vector regression (SVR) method is put forward to formulate a regression prediction model for the sliding resistance. The predictions yielded by this method were proximate to the experimental outcomes. It implies that the SVR model exhibits a superior prediction capacity even with a restricted number of samples. The research discloses the impact of the air curtain, ground contact pressure, the floating device’s sliding velocity, and soil moisture level on the sliding resistance. It lays a solid research foundation for the drag reduction design of submerged floating vehicles in deep soft terrains.
Application of Learning Pass Information Technology Platform in Blended Teaching Module on Integrated Moral-art Education
Authors: Jinzhang Leng,
Published: January 2025

The in-depth integration of modern information technology with contemporary education and teaching is a major development strategy for China's education and a trend in the development of world education. This study takes Learning Pass information technology platform as the teaching platform and introduces blended teaching into the classroom teaching of Chinese moral education course. Then the construction of resources and the design of blended teaching process are carried out to explore the effect of blended teaching based on Learning Pass information technology platform. Through specific teaching practice, the problems in the design and application of blended teaching can be improved to enhance the effect of moral education teaching. This study adopts a quantitative research approach to collect and analyse receipts. Questionnaires were distributed to learners and interviews were conducted to obtain more accurate data. It was found that the blended teaching module on integrated moral-art education implemented on the basis of Learning Pass information technology platform was significantly better than the traditional classroom teaching. The blended teaching approach with the help of information technology not only enhances students' independent learning ability, but also stimulates students' interest in learning and enables them to master the knowledge of the course more comprehensively. Teachers can better grasp the learning status of students through the Learning Pass information technology platform and provide personalized services to students.
Exploration of Micro-specialty Construction Based on Big Data and AI from the Perspective of Medical and Industrial Integration: A Case Study of Intelligent Technology Aging Application Micro-specialty in Anhui Sanlian University
Authors: Chun Zheng
Published: January 2025

With the aggravation of population aging, the demand of the elderly for old-age services is becoming increasingly diversified and personalized, which poses a severe challenge to the traditional old-age service model. In this context, it is particularly important to build a micro-specialty of "intelligent technology suitable for aging application", which combines big data analysis with artificial intelligence technology. Based on the practical exploration Faculty of Modern Health Care Industry College of Anhui Sanlian University in the field of health care industry, this paper deeply analyzes the social background and necessity of micro-specialty construction and expounds in detail how to use big data and artificial intelligence technology to design the content, implement path planning and build the evaluation system of micro-specialty construction. This micro-major trains compound talents who have mastered medicine, engineering and other fields, and have big data analysis and artificial intelligence applications, so as to provide safer, more convenient, and personalized aged care services and provide strong support for the innovation and development of the health care industry.
Design and Key Points Analysis of the Intermediate-depth Geothermal Central Heating Project in Pingyuan County
Authors: Jianguo Yu
Published: January 2025

In the past 20 years, In China deep geothermal heating projects have developed rapidly, in the scale of the world top. It is understood that Iceland can provide central heating for 90% of homes by developing medium-and deep-seated geothermal reservoirs. Germany has gradually made medium-and deep-seated geothermal reservoirs a key target for development, to meet the heating needs of Germany 1/4. Based on the actual engineering project, this paper analyzes the geothermal state, key technology, core parameters and so on in the project engineering design, and compares and selects the schemes in the design, finally, the optimal design scheme is determined and the economic benefit is analyzed. The key problems in engineering design are summarized and some suggestions are put forward.
Thinking and Research on Construction of Aesthetic Education Evaluation system of Universities in the Era of Artificial Intelligence
Authors: Junjie Zhang
Published: January 2025

With the rapid development of artificial intelligence, digital empowerment in education has become a trend of the times. Among this, the comprehensive enhancement of students' core qualities such as cultural understanding, aesthetic perception, artistic expression, and creative practice has become one of the main objectives of education in the era of artificial intelligence. Achieving educational goals requires corresponding evaluation work. Therefore, this paper proposes the development path of clarifying values, distinguishing between the values of the times and practical values, shifting the focus of aesthetic education evaluation, improving the aesthetic education evaluation system, and optimizing aesthetic education teaching models. The implementation of these paths is conducive to further promoting the high-quality development of aesthetic education in universities, achieving the goal of "cultivating people through beauty, enriching people through beauty, and nurturing people through beauty."