bluuebunny/crossref_metadata_2025_split huggingface dataset:
Principles of internet education for students on the subject “information technology and mathematical modeling of processes” on the basis of “moodle” distance learning system
Authors: Baydullaev A S , Mamatkulov Z U , Samigova N H , Shadmanov K K , Narzullaev D Z 
Published: August 2021

AbstractThis article gives a brief description of the principles of organization of Internet education in the teaching of “Mathematical modeling of information technology and processes” to students on the basis of “Moodle LMS” system distance learning at the Tashkent Pharmaceutical Institute and shows its main features and advantages. Extensive use of educational technologies, optimization, humanization and innovation in the National Program of Personnel Training to solve the tasks of training and educating young people to be highly moral, spiritual and enlightened, conscientious at work, deeply aware of their responsibilities to society and family, competitive, qualified professionals. The organization, management and control of the learning process on the basis of methods is relevant. Nowadays, a wide range of opportunities are being created for students to have fast, plentiful, reliable information and to acquire knowledge independently. In particular, electronic systems allow students to use important information related to science at any distance, depending on their capabilities. “Moodle” open source software complex is a system designed specifically for the management of the educational process using the Internet (Learning management system - LMS). Distance learning is a modern form of organizing the learning process using distance learning technologies. Its development was due to the increase in the number of Internet users, the availability and quality of open learning electronic resources. The use of distance learning technologies undoubtedly has a wide range of advantages: the organization of the learning process in an Internet environment, so the student location does not prevent high-quality training, regardless of the location of the educational institution. Distance learning is based on the principle of independent preparation of students through teacher guidance and allows you to choose a convenient time for lessons. It includes interactive communication between teachers and students, information resources of the educational institution and information resources of the Internet, the rapid delivery of the Internet in electronic form.
Use of information technology in spreading new knowledge in agriculture
Authors: Kondratieva O V , Fedorov A D , Slinko O V 
Published: August 2021

Abstract
Popularization of scientific and technological achievements, advanced experience and new knowledge in the agribusiness, especially in current conditions, can be considered as a mechanism that contributes to the receipt by agricultural producers of relevant, high-quality and reliable information on issues of interest and problems in the field of agriculture. The article presents the results of popularization of scientific resources using the database (DB) called “Users of scientific and engineering products in the agribusiness.” The database is maintained to collect information about users by category of organizations, user distribution by federal district, and on the preference of issues of interest to them in subject areas in order to further improve the provision of scientific and engineering information for users in the area of technical and engineering education. The results of the database are used in proposals for adjusting the subjects in the preparation of analytical materials on the engineering and technological support of the crop and livestock product manufacture and processing.
The use of real technical tasks for the implementation of websites for the formation of professional skills of web developers
Authors: Glagolev V , Bazhenov R , Kuldysheva G , Ledovskikh I , Maximov V 
Published: August 2021

Abstract
The paper deals with the problem of the formation of professional skills in web development. The task is solved through the use of real technical tasks for the implementation of websites in teaching, the inclusion in the curriculum of the educational program of the disciplines “Methods and tools for designing information systems”, “Programming network databases” and “Web programming”. The developed methodology was tested at Sholom-Aleichem Priamursky State University, Osh State University, Pacific National University and North-Eastern Federal University during the 2019-2020 and 2020-2021 academic years. 42 students of the direction “Information systems and technologies” took part in the training. The content of the disciplines included obligatory project team work on an assignment from an industrial partner. An important element of preparation was the final exam conducted in the format used in WordlSkills championships. The developed websites were assessed by independent qualified third-party experts in the following areas: work organization and management, communication and interpersonal skills, design and layout, server and client-side programming, database and web portal design. As a result, 74% of students implemented the web portal and submitted the project on time. As a result of passing disciplines and implementing web portals, students studied the principles of rapid development of web systems, received professional competencies and interaction with real organizations.
Model of an intelligent system for managing the process of developing the competencies of industrial enterprise employee’s competencies
Authors: Abrahamyan Gennady , Atayan Anush , Sharabaeva Lyubov , Gureva Tatiana 
Published: August 2021

Abstract
The article considers issues and tasks of industrial enterprise employee’s competencies development in conditions of digitalization of economy. Analysis of automated systems, tools and intelligent technologies of formation, monitoring and development of industrial enterprise employee’s competencies development was carried out. The choice of software tools of the Microsoft Power Platform analytical platform for intelligent support of industrial enterprise employee’s competencies development is justified. A typical digital infrastructure for training of industrial enterprise employees is considered: goals, functions, elements and relationships for automating and intellectualizing the development of competencies of enterprise employee’s. Proposals are made to improve the digital infrastructure for training industrial enterprise employees. A model of an intelligent system of managing employees’ development is proposed. It provides monitoring of employee’s actions and recording the results of competencies development. This model is based on the integration of data collection and analysis processes of the digital profile of employee competencies and its relationship with the competencies profile of the position based on the iterative algorithms of the Microsoft Power Platform (Power BI, Power Automate, Power Apps, Power Virtual Agents).
On the use of information technologies in the training of specialists in the textile industry
Authors: Dobrovolskaya T A 
Published: August 2021

Abstract
The article analyzes the features of the use of information technologies in the development of disciplines by design engineers studying the issues of materials science and the manufacture of products from textile industry materials. Depending on the tasks being solved by design engineers of the textile industry, it is advisable to introduce the following information products into the educational process: to determine the structural characteristics of textile industry materials and evaluate their utilitarian properties-Microsoft Excel spreadsheets and applied author’s programs, to analyze regulatory requirements - the Microsoft Access database. The use of the proposed training technology will significantly improve the quality of training and information culture of textile industry specialists.
LSM and Digital Education Transformation
Authors: Korikov A M , Levin S M 
Published: August 2021

Abstract
The article describes the research carried by the authors in the global improvement framework of electronic tools in distance education. The text discusses digital transformation problems associated with using pedagogical concepts by universities in distance learning utilising learning management systems. In researching the problems, investigated the leading pedagogical technologies of behaviourism, cognitivism and constructivism, and aspects of personality-oriented and project-based learning. It was revealed a main regular concepts methods that can be applied in distance learning. The authors analysed a sample of the most popular LMSs for the sufficiency of functions to implement these pedagogical methods. As a result of research, the studied LMS has a fairly wide range of functions. However, these functions are not sufficient enough to allow all indicated pedagogical methods using. To compensate for the lack of LMS functionality, the authors recommend practising external electronic resources could be integrated into the learning management systems used by universities.
Reliability and quality of distance learning technical education in the context of the COVID-19 pandemic: practice and issues
Authors: Klepalova Yuliya I , Yur Igor P , Tarasova Yulia N , Savka Olga G , Maystrovich Elena V 
Published: August 2021

Abstract
The covid-19 pandemic, which was announced in March 2020, has made significant changes in all spheres of society, the state and the world in general. A quick restructuring of many structures, processes and mechanisms was required. The education system is no exception. The educational process was modernized, a large number of new technologies were introduced and the existing mechanisms were improved. So, in the conditions of the forced transition to training using distance educational technologies in the spring of 2020, it becomes necessary to assess the quality of the functioning of educational software in the higher technical education system. This article is aimed at researching and analysing the practical and theoretical aspects of the use of distance learning technologies in order to determine the correspondence of the quality of distance learning to the traditional form of full-time education. The authors of the article pay attention to the possible prospects for the development of distance learning within the technical education system in the Russian Federation, not only as a response to changing epidemiological conditions, but also as a potentially alternative form of education. The study assesses the success of using software systems, identifies the advantages and disadvantages of the existing system of distance education.
Enhancement of Compatibility of SBS Modified Asphalt by CNTs: Interpretation from Dissipative Particle Dynamics Simulations
Authors: Hu Kui , Yang Yi , Yu Caihua , Zhang Taoli 
Published: August 2021

Abstract
The compatibility of styrene-butadiene-styrene (SBS) with base asphalt is known to restrict the application of SBS modified asphalt. In this study, carbon nanotubes (CNT) were used to enhance the compatibility between SBS and base asphalt. The effect of CNTs on the compatibility of SBS modified asphalt was investigated by dynamic mechanics analysis (DMA), and the micro-mechanism of CNTs enhancing the compatibility of SBS modified asphalt was studied by using dissipative particle dynamics (DPD) simulation. The results show that CNTs can significantly improve the compatibility between SBS and base asphalt, and the microscopic mechanism is that CNTs can change the distribution morphology of SBS in base asphalt, making the distribution of SBS modified asphalt more uniform, which promotes the development of polymer-rich phase in SBS modified asphalt. This study can provide theoretical guidance for the practical application of SBS modified asphalt.
3D-Printed Polymer Composites Based upon Low Melting Point Alloys Filled into Polylactic Acid
Authors: Liu Junfeng , Li Zhen , Yu Yuan , Wang Pengfei 
Published: August 2021

Abstract
In this study, advanced low melting point alloys (LMPA)/polymer composited wires for fused deposition modelling (FDM) processes were developed. The Polylactic Acid (PLA) powder was mixed with LMPA powder and multi walled carbon nanotubes (MWCNTS). The liquid state of LMPA will not hinder the processability of polymer composites when the composites were extruded out as wires. Thus, the composited wires can be optimally fabricated with high stabilities as well as large quantities. The prepared PLA/LMPA/MWCNTS wires could be further dedicated to print with 3-dimensional (3D) structures. Additionally, the tensile modulus of the printed composites was three times as higher as that of the pure PLA. The tensile modulus of composites is temperature-dependant, specially it would decrease more significantly at the melting point of LMPA. The study on the FDM of the advanced composited-wires would inspire a new branch in the additive manufacturing. The material could also be potentially applied in variable stiffness components, electromagnetic shielding and other applications.
A Review of Key Technologies and Properties for Graphene Cu-Based Composites
Authors: Liu K M , He G Y , Sheng X C , Han N L , Li M L , Zhang M C , Zou J , Fu K , Huang H M 
Published: August 2021

Abstract
Cu-based composites are widely used in mechanical, electrical, communication, transportation and microelectronics industries due to their excellent properties. However, the difficult match between strength and conductivity is the main problem for Cu-based composites. And thermal-mechanical treatment technologies reached the limit to improve and control their comprehensive performance. Graphene is a two-dimensional layered material with carbon atoms hybridized by SP2 orbital, and has high strength, good electrical conductivity and thermal conductivity. It is expected to solve the contradiction between the strength and conductivity of the composites by introducing graphene into Cu-based composites. In this paper, the commonly used methods for effective dispersion of graphene and interface bonding were introduced, the researches on the strength, toughness, electrical conductivity and thermal conductivity were outlined, lastly the future development of graphene Cu-based composites was prospected.
Research Progress of Nanomaterials in the Prevention of Biological Fouling on Ships
Authors: Mao Xin , Cui Xin , Chen Shuiping 
Published: August 2021

Abstract
Marine fouling is one of the causes of Marine corrosion, which causes material corrosion to sailing vessels and a variety of Marine structures, but also has a great increase on the daily maintenance cost and energy consumption. In this paper, the formation process, mechanism and harm of biological fouling are briefly introduced, and then the application research progress of nanomaterials in preventing Marine biological fouling of ships in recent years is comprehensively discussed. We found that the research mainly focused on the application of nano-oxide materials in Marine biological fouling prevention, and adding anti-fouling agents of nano or modified nanomaterials in the preparation of materials to enhance the properties of materials, which could provide support for further exploration of nanomaterials in biological fouling.
Parameter Determination and Model Modification of Sherwood-Frost Constitutive Model
Authors: Zhang Kebin , Li Wenbin , Zhao Changfang 
Published: August 2021

Abstract
The Sherwood-Frost constitutive model is widely used to predict the mechanical behavior of polymer materials, and it is a very important material model. In this study, the stress-strain curve of high-density polyethylene (HDPE) with a strain rate ranging from 935 to 5450 s−1 was obtained through the split Hopkinson bar test device. Based on the HDPE dynamic mechanical performance test, the method for determining the strain-rate parameters of the Sherwood-Frost constitutive model was analysed and the strain-rate term in the constitutive model revised. Using the experimental results of Sherwood and Frost, the method to determine the parameters of the density and temperature terms in the model was introduced. This study provides a reference for parameter determination and model modification of the Sherwood-Frost constitutive model.
Research on Metallographic Examination of Thermal Spraying Coatings
Authors: Yu Ting , Li Yang , Zhang Fang , Lu Shuhua , Gao Zhen 
Published: August 2021

Abstract
The metallographic study of thermal spraying coatings was carried out on three double coating samples. ‘ASTM E3 metallographic Sample Preparation Method’ was selected for sample preparation, and coating inspection was conducted according to’HB 20195-2014 Metallographic Examination of Thermal Spraying Coatings’. The interface state, cracks and microstructure of the coating analyzed by‘ HB 20195-2014 Thermal Spraying Coating Metallographic Examination’. In combination with Image-Pro Plus quantitative analysis of porosity and unfused particles of coating, the thickness of coating was measured by using pull method. For the first coating, the microstructure, crack, coating thickness and porosity were tested. For the second coating, the microstructure, interface state, cracks, coating thickness, porosity and unfused particles were tested. Through the research on metallographic examination of thermal spraying coating, its hoped to provide some reference value for the examination of other coatings.
Crack Elimination and Surface Quality Enhancement of the Wear-resistant Layer on Guide Slippers of Coal Cutting Machines
Authors: Chen Jialu , Xue Yu , Liu Kun , Jiang Fengge 
Published: August 2021

Abstract
In order to enhance the surface quality and avoid the cracking problem of the wear-resistant layer on guide slippers of coal cutting machines, an automatic welding system was employed for the overlaying welding production. By regulating the welding parameters, including the welding path and speed, the surface flatness and quality were greatly reduced. The cracks at the arc extinguishing positions were effectively eliminated. As compared to the conventional manual welding, the automatic welding not only reduced the machining allowance, but also increased the production rate and the service life of the guide slippers.
Experimental Study of Milling Cutter with High Damping Alloy Sleeve
Authors: Sheng Dongping , Lu Fengxia , Wan Hongshen 
Published: August 2021

Abstract
This paper proposed three types of milling cutter, including the normal one, the modified cutter with high damping alloy sleeve, the modified cutter with high damping sleeve and gasket, these three type of cutters are identified with type A, type B and type C respectively. The testing items including cutting force, surface smoothness and fatigue life of above three type of cutter are conducted under different working conditions respectively. The result shows that the milling cutter with high damping alloy behaves better and could improve the related performance dramatically. Specifically, the cutting force of the cutters including type B and C is lower obviously than type A at three different directions, and type C cutter has the lowest cutting force and has the best anti-vibration effects. Additionally, under working condition 1, the surface smoothness of the three type of cutters have the similar behavior. But under working condition 2, the high damping milling cutter has at least 30% improvement. Finally, at the aspect of the fatigue life, the milling cutter with high damping alloy has at least 54.55% better performance than the normal cutter, and the wear of the high damping cutter is at least 38.13% less than normal cutter.
A Multiple Solutions Approach to the Inverse Kinematics Problem of a General Serial Manipulator
Authors: Fan Yanping , Li Pin , Zhen Xijin , Shen Zongbao 
Published: August 2021

Abstract
The inverse kinematics problem (IKP) is at the center of computer control algorithms for general serial manipulator. The exact number of feasible solutions of the IKP is highly dependent on the manipulator structure as well as the desired end-effector pose, and the existing inverse kinematics methods have difficulties to solve all feasible solutions of a general serial manipulator. In this work, a multiple solutions approach is applied to the IKP. Then, three numerical examples are used to validate the effectiveness of the multiple solutions approach, and the numerical results demonstrate that the multiple solutions approach is effective and practicable. Finally, an infinite solutions example is presented to show that the proposed approach could also provide limited number of numerical solutions in singularity.
A Study on Strain Energy of Ellipsoidal Inclusion in Half-space
Authors: Qian H P , Zhu K , Zhang R , Li P , Jin X 
Published: August 2021

Abstract
An inclusion refers to localized eigenstrains appearing in such processes as thermal expansion and plastic deformation. In view of micromechanics, the existence of inclusions may significantly influence the mechanical properties of the engineering materials. A micromechanical model is proposed to determine the variation of the strain energies in the presence of the near-surface inclusions. The corresponding inclusion problem in a half-space is usually difficult to be solved analytically. In this work, the strain energy is evaluated numerically via the method of images, which superposes the counterpart solutions in full-space and eliminates the tractions on the boundary surface of the half-space. The validity of the present work is confirmed by comparing with the published results and the finite element method (FEM).
Study on Mechanical Properties of Curved Vascular Stent after Crimping
Authors: Pan Chen , Han Yafeng , Lu Jiping 
Published: August 2021

Abstract
It is a great challenge to improve the mechanical properties of vascular stent, especially in curved vessels. Vascular stent should have ideal mechanical properties, such as high elasticity, high strength and biocompatibility. At present, most of the literatures focus on the mechanical properties of the stent after expansion, ignoring that of the stent before the stent is implanted into the human body. After the stent is crimped, it has a great impact on the stress fatigue of the stent. Excessive compression will lead to the weakening strength, which cannot support the blood vessel. Therefore, in this paper, an improved algorithm was proposed to crimp and straighten a curved stent to a smaller diameter to generate the required boundary conditions by finite element analysis (FEA). This method is helpful to study the mechanical properties of the stent after being crimped and treat lesions in highly curved locations.
Structure Analysis and Optimization Design of the Base of Four-pillar Hydraulic Testing Machine
Authors: Zhu Yurong , He Yan , Ren Jialong 
Published: August 2021

Abstract
Hydraulic testing machine is a kind of testing machine that transfers energy to implement mechanical test by liquid as medium. With the emergency requirement of energy saving and emission reducing, it becomes significant to kick off the infrastructure research to optimize the hydraulic testing machine. At present, some new products always designed with experience is without any improvement. Consider the current situation in testing machine industry, and combined with the desire of design lightweight, some job about optimization and parametric design of product was done from the angle of finite element in this paper. Following content is included: getting a more accurate finite element analysis method about the analysis of the base based on Solidworks, Hypermesh, ANSYS, and optimize model of the base by Optistruct. A more reasonable model of the base with full strength is been got. Puts forward a kind of finite elements analysis for the structure of the hydraulic testing machine. Meanwhile, share shape optimization techniques through which the structure is designed more reasonable.