bluuebunny/crossref_metadata_2025 huggingface dataset:
Optimization of mechatronic drives motion laws for automated equipment
Authors: Matsko O N
Published: November 2021

At present, when designing mechatronic cyclic drives the developer as a rule chooses the law of motion, specifying as input data, the cycle time and the amount of movement and often introducing restrictions, for example, on maximum acceleration in case of developing high-speed drives. However, this approach leads to an overestimation of the maximum drive power and, as a result, a significant increase in energy consumption. In this paper it is shown that by choosing a rational law of motion of the drive at the stage of equipment design, it is possible to achieve a sufficiently effective optimization according to various criteria. The efficiency of optimization of different motion laws of cycle drives according to various criteria is analyzed. The dependences between the maximum instantaneous power, the amount of movement, the speed and energy consumption are established and graphically presented confirming the effectiveness of the rational choice of the law of motion parameters under an inertial load. At the same time, it is shown that when synthesizing the law of motion, it is necessary to take into account the maximum possible number of parameters so that the improvement of some parameters does not lead to a decrease in other parameters.
Control of a reversible electric machine included in the vehicle suspension
Authors: Zamyslov V
Published: November 2021

The relevance of the work is due to the constantly growing requirements for the ride comfort of automobiles. The purpose of the study is a rational choice and combination of principles for constructing an algorithm for controlling an electric machine, replacing a hydraulic damper in the design of a vehicle’s suspension system. The study of the behavior of suspension, depending on the applied control algorithms, was carried out by the method of mathematical modeling. In this work, the control of the suspension of one wheel was considered. The angular and longitudinal oscillations of the body were not the subject of this study. In this regard, the applied design scheme is two-mass. The positive and negative aspects of various principles for calculating the target force generated by an electric machine are considered, and an algorithm for calculating the magnetic flux and armature current of an electric machine necessary for the implementation of the target force under various conditions is developed. It is shown that the calculation of the target force should be based on a combination of several principles, since this allows significant expanding of the suspension operating conditions range.
Improving the tests of catalytic converters accounting for the relationship between the composition of the working mixture entering the engine combustion chamber and CO and CH in exhaust gases
Authors: Zaloznov A , Pevnev N , Borodulina S , Trofimova L
Published: November 2021

The article presents results of the study aimed to establish the relationship between the working mixture entering the engine combustion chamber and CO and CH in the exhaust gases. On the basis of the theory of fuel combustion in the engine chamber and the systematic approach, and using the mathematical methods, the fuel combustion in the combustion chamber is analyzed at low ambient temperatures to decrease emissions of carbon monoxide and hydrocarbons. The criterion for optimizing the tests of catalytic converters is substantiated for low temperatures - temperatures of the heat flow of the mixture at the exit from the combustion chambers of the engine cylinder. The limitation is the warm-up time of the catalytic converter when testing it on vehicles operating at low temperatures and the standards for the content of CO and CH in the exhaust gases of a passenger car engine. The application of the methods and the mathematical model can be the basis for supplementing UNECE Regulation No. 83-06 and improving the VI type test method for vehicles operating at low ambient temperatures.
Automatic assistance system for visual control of targets
Authors: Tulchinskii V V , Tulchinskii V I , Kondratyev S I , Boran-Keshishian A L
Published: November 2021

The article discusses the possibility of creating a system for automating the process of searching and assessing the danger of targets using machine vision and existing ship systems. The technologies for processing images from the ship’s camera system are analyzed: object recognition by a ready-made convolutional neural retrained network, as well as object detection by SURF algorithms. The parameters of the danger of goals within the framework of the problem to be solved have been analyzed and developed, and a structural analysis has been elaborated. The functionality of the automatic operation of the system as a closed circuit has been considered. To achieve the technical result in the system as an integrated part of the ship’s equipment based on cognitive information processing, a composite information object from the ship’s sensors and control systems was introduced. It is decomposed into blocks in which the associated logical information processing takes place using basic modules consisting of adaptive cells-approximators as learning elements capable of independently processing information. The following units are included in the local area network: an information support unit (ISU), a decision making unit (DMU), a command-organizational unit (COU) with an operator’s workstation. The ISU is connected by a two-way communication output with aggregate LAN units, the other output is connected in series with a situation determination unit and the “model of the surrounding space” block. The survey was carried out on board a modern LNG gas carrier using ship systems.
The onboard expert measuring system for assessing the technogenic risk during towing operations based on the fuzzy logic
Authors: Studenikin D E , Chizhikova M I
Published: November 2021

The article describes a method used to create an on-board measuring system to determine the degree of risk in towing operations using the mathematical apparatus of fuzzy logic. Based on the method of paired comparisons and transformations and using the interpolation method, membership functions of linguistic variables for determining the degree of risk were calculated. To eliminate the misperception of control commands in the tug in towing operations, the concordance component of risks was used. This method was used to assess the risk value for mooring with several operations. The on-board measuring system for risk assessment was developed. Its main component is a data bank containing factors that affect an assessment of the state and results of the fuzzy logic unit. The system can assist skippers in the decision-making process in shipboard operations. The fuzzy logic system was tested by interviewing maritime workers; the result proved the adequacy of this system.
Indication of a ship location by the Earth’s geomagnetic field
Authors: Zalomikhin D V , Boran-Keshishian A L
Published: November 2021

The present study focuses on the need to increase the number of methods for indicating a ship location in traffic conditions on routes with heavy shipping, as well as during navigation in hard hydrometeorological conditions. The research purpose is to increase the level of safety and accuracy of ship navigation and effectively meet the requirements in the field of navigation safety and environmental protection. The issue of navigating through physical fields has a wide range of unresolved tasks despite the previously conducted studies. These tasks include investigation of geomagnetic sensors and their relationship to geomagnetic maps, as well as magnetic compasses and ways to improve them by using magnetometers and eliminating errors caused by rotation of the magnetic needle.
Design concept of onboard air purification system for commercial aircraft
Authors: Gushchin S V , Polonova A V
Published: November 2021

The purpose of the article is to discuss methods of air disinfection in passenger aircraft cabins during flight. In the course of the study, a comparative analysis of modern methods of cleaning and disinfecting air in closed rooms was carried out. The efficiency, mass characteristics and energy consumption of UV sources are compared. The use of photocatalytic filters based on the phenomenon of oxidation of organic substances under the influence of sunlight in the presence of a catalyst is proposed. As a result, the authors compare the efficiency of disinfection and energy consumption when using various methods of air purification. In addition, the authors draw conclusions about the prospects of the proposed method of air disinfection using photocatalytic filters in relation to the cabins of passenger aircrafts. The schemes of rational placement of UV sources are proposed, which allow obtaining the maximum efficiency of air disinfection.
Analysis of the massive MIMO technology
Authors: Druzhinina N S , Daudov I M
Published: November 2021

The article discusses the features of the Massive MIMO technology, the structure of the antenna array, as well as the advantages and example of using the massive MIMO system. The use of Massive MIMO opens up new opportunities and makes a significant contribution to achieving the stated requirements for the further evolution of LTE and 5G.
Description and tests of a control system for automatic emergency braking of a car with an algorithm for predicting the adhesion of automobile tires to the road surface
Authors: Petin V V , Keller A V
Published: November 2021

Every year the number of cars in the world is steadily growing, which in turn leads to an increase in road accidents. Russia, as the largest country by area in the world, has a number of traffic-related features that are not typical for other regions, including changing road and climatic conditions. The sharp increase in the number of accidents in the first hours after precipitation is especially noticeable, that indicates the difficulty to adapt to the changing traffic situation for vehicle drivers. More than 60% of collisions, according to the traffic police databases for 2018-2019, occur due to incorrect predictions by drivers of the braking distance of their cars. As a rule, this can happen due to the inexperience of the driver, incorrect assessment of the current adhesion properties of the roadway, distraction to a mobile phone, the climate or multimedia system of the car, movement with insufficient visibility. Preventing collisions occurring in such scenarios is the main task of an intelligent driver assistance system such as the automatic emergency braking system. The main part of this system is an adequate assessment of dynamically changing road and climatic conditions and warning the driver of a possible collision hazard, as well as automatic action on the vehicle’s brake drive to prevent a collision. The article describes control algorithms for assessing and predicting dangerous situations.
Algorithm for adapting the clutch of robotic transmissions of commercial vehicles in the light commercial vehicles and light-duty trucks class
Authors: Vashurin A S , Yarzhemskiy A D , Stepanov E V , Yusupov R R
Published: November 2021

In the modern world, the main efforts of developers of commercial vehicles are aimed at increasing the economic efficiency of using cars, reducing the negative impact on the environment and increasing the level of safety, both passive and active. The use of automatic transmissions allows the engine to work in the most optimal modes, and the driver to concentrate on monitoring the traffic situation and not be distracted by gear shifting. In commercial vehicles, robotic mechanical transmissions have become widespread. In such a transmission, the clutch and gear selection are controlled by actuators controlled by an electronic unit. Dry clutches are common in commercial vehicle transmissions. For adequate control of the clutch, it is necessary to have its high-quality model, which takes into account the coefficient of friction, touch point, the effect of temperature and many other factors. Therefore, the actual problem in the control of such transmissions is to determine the touch point of the clutch, which can serve as the main source of uncertainty in the clutch model along with the coefficient of friction. This article proposes an adaptation method for assessing the clutch touch point in real time. This approach has been applied to dry clutch control in transmissions of LCV and LDT vehicles, and the results are experimentally validated on robotic transmissions in production vehicles.
Improvement of the vessel traffic control system for accident-free electronic navigation in the port area
Authors: Vasyutina A A , Popov V V , Kondratyev A I , Boran-Keshishyan A L
Published: November 2021

The increase in the intensity of navigation leads to unsafe navigation, which necessitates the improvement of existing measures to ensure safe navigation using specific mathematical models and methods. The configuration of the mathematical model of the traffic flow of ships obtained in this study is realizable on modern computer technology and can be applied by embedding advanced ship traffic control systems, which is an object of the infrastructure of a modern seaport.
Optimization of the configurations of the control complex of the integrated navigation bridge of the ship by the method of multiprogramming
Authors: Troeglazov A P
Published: November 2021

In the concept of development of E-navigation, large control systems for navigation, navigation safety, optimization of ship operation, and cargo operations are being developed. The vector of the direction of this development leads to fully automatic management of the maritime industry and individual segments, such as navigation and terminal operations, with the transfer of unified databases to “cloud” technologies. In modern control systems, a significant number of programs for processing information flows and databases are required from external sources. The method of addressing “cloud” technologies and external storage devices, which are updated in real-time, and a complete transition from analog, analog-digital, only to digital media and information processing systems, is adopted. The method of addressing “cloud” technologies and external storage devices, which are updated in real-time, and a complete transition from analog, analog-digital, only to digital media and information processing systems, is adopted. Modern computer systems for helping the navigator in making decisions are shifting to the area of deep integration of control actions and information processing in real perception and optimization of a verified and safe algorithm of actions. The time of work with such complexes depends on the efficiency in organizing data exchange in the “man-machine” system. In the study, an algorithm was developed for deep optimization of the control complex of the ship, to minimize and create a control shell of the “man-machine” system, using the multiprogramming method to stabilize the route passage.
Evaluation of the compatibility of the power traction supply system with a use of a “virtual coupling” technology
Authors: Olentsevich V A , Astashkov N P , Akhmetshin A R , Suslov K V , Shtayger M G , Karlina A I
Published: November 2021

This article will propose the practical use of the interval control technology that will reduce the interval of passing trains and will increase the capacity of railway lines. Controlled approbation of the technology was carried out on railway sections for freight traffic: Shkotovo - Nakhodka, Novonezhino - Krasnoarmeysky of the Far Eastern railway and Koshurnikovo-Shchetinkino of the Krasnoyarsk railway in terms of “push locomotives” transferring to the opposite direction using the “virtual coupling” system; Mogocha - Urusha of the Trans-Baikal railway in terms of traffic organizing using the “virtual coupling” system for empty trains during long “Windows” on infrastructure; Slyudyanka - Bolshoy Lug of the East Siberian railway in terms of testing interval control technology to ensure the return of odd freight trains “push locomotives” using the “virtual coupling” system. The practical experience of the system use considered in the article allowed us to identify the main directions for its further development: protected radio channel stability improvement in obstacles of the rough terrain and the presence of tunnels; auto-driving algorithms operation.
Formalized model and algorithm for managing complex interaction of heterogeneous transport
Authors: Shramko A P
Published: November 2021

The problem of ensuring the reliability of heterogeneous transport systems is extremely multifaceted and covers all stages of development - from design to operation. To increase efficiency, there is a need to harmonize the processes taking place in heterogeneous systems within the framework of single transport communication. The lack of appropriate theoretical justification leads in practice to the emergence of insufficiently substantiated decisions, because of which subsequent efforts made to eliminate the discovered shortcomings are, as a rule, costly and ineffective. Assessment of the system of integrated regulation of the transport system, from the point of view of its sustainability, is an indispensable condition for its operational efficiency and reliability. The efficiency of transport processes assumes that the effective functioning of local transport systems is ensured by the level of interaction between participants in the transport process, modes of transport that create positive dynamics of transit freight turnover. The paper substantiates the need for complex interaction in the management of the regional transport system, considering the interaction of adjacent modes of transport in a single information space. The method describes in detail the solution of forecasting and coordination problems in maritime transport systems, harmonization of the interests of heterogeneous transport in solving forecasting and control problems.
Modeling of intelligent transport systems maintenance processes
Authors: Goloskokov K , Korotkov V , Marley V , Knysh T
Published: November 2021

The paper describes the problems of modeling of technical support systems of transport systems related to organizational and technical systems based on the implementation of the system approach to information technologies. It gives the theoretical basis for the description of technical maintenance of intelligent transport systems taking into account cybernetic representation. The paper also justifies the formalization of the process of technical maintenance of information systems, which include intelligent transport systems. It shows that a modern maintenance system of intelligent systems should be able to quickly adapt to needs and, if necessary, increase the amount of recovery works without disrupting the existing mode of operation.
Research of algorithms for road marking recognition in the lane departure warning system
Authors: Tumasov A V , Yu Tyugin D , Porubov D M , Filatov V I , Gladyshev A A
Published: November 2021

The way to improve the safety of vehicles using ADAS systems has successfully proved itself in practice. The use of ADAS systems in vehicles is mandatory in many countries of the world and is accepted at the state level. One of the most widely used ADAS systems is the Lane Departure Warning System (LDWS). The paper describes the principles of operation of existing LDWS in the segment of light commercial vehicles (LCV). The algorithm and structure of the developed LDWS for the GAZelle Next vehicle are presented. The description and analysis of algorithms for recognition of road markings are given. The results and comparative analysis of virtual and road tests of the LDWS are presented. Conclusions are given on the operation of the system and the algorithm for recognizing road markings.
Determination of the optimal modes of filling and emptying the chamber of the navigational lock of a low-pressure hydroelectric complex
Authors: Morgunov K P , Ryabov G , Buchnev I
Published: November 2021

The construction of the low-pressure Nizhny Novgorod hydroelectric complex covered by the Strategy for the Development of Inland Water Transport of the Russian Federation for the period up to 2030 envisages a ship lock as part of the hydroelectric system to ensure ships passage. One of the options under consideration is a ship lock with a head power system, which uses short bypass water-circulating culvert for filling and emptying the chamber. At the same time, an important task is to select the optimal modes ensuring movement of the gates of the filling and emptying systems, in which the normative values of the hydrodynamic forces influencing the vessel in the chamber during the lock process would not be exceeded. The article describes the experience of performing laboratory hydraulic studies of the ship lock model and presents the results of determining the optimal modes of locks movement in the ship lock filling and emptying systems. The studies were carried out on a model located in the hydrotechnical laboratory named after Professor V.E. Timonov of the State University of Maritime and River Fleet named after Admiral S.O. Makarov. The article describes the experience of performing laboratory hydraulic studies of the ship lock model and presents the results of determining the optimal modes of gates movement in the ship lock filling and emptying systems. The studies were carried out on a model located in the hydrotechnical laboratory named after Professor V.E. Timonov of the State University of Maritime and River Fleet named after Admiral S.O. Makarov. The studies included three series of measurements taken at different speeds of gates movement. The speeds were assigned based on the following idea: the maximum hydrodynamic forces of one of the series were close to the permissible values, and of the other two – 30–50 % smaller and larger, respectively. The experimental results determined the optimal operating modes of the systems for filling and emptying the lock chamber. It is recommended to select of the optimal modes of gates movement in full-scale conditions on the newly built ship locks immediately after their construction.
Information Security Problems and Solutions in Cloud Era
Authors: Huang Kun
Published: November 2021

Era of cloud computing, data and personal information into gold on the “cloud” has great value, at present for the cloud of the era of corporate and personal data leakage, network attacks and other security events are occurring, this article mainly discusses the cloud age how to ensure the security of enterprise and personal data, the information security how from passive defense to conduct surveillance and response, etc are analyzed and explored.
Image Compression Algorithm Based On Variational Autoencoder
Authors: Sun Ying , Li Lang , Ding Yang , Bai Jiabao , Xin Xiangning
Published: November 2021

Variational Autoencoder (VAE), as a kind of deep hidden space generation model, has achieved great success in performance in recent years, especially in image generation. This paper aims to study image compression algorithms based on variational autoencoders. This experiment uses the image quality evaluation measurement model, because the image super-resolution algorithm based on interpolation is the most direct and simple method to change the image resolution. In the experiment, the first step of the whole picture is transformed by the variational autoencoder, and then the actual coding is applied to the complete coefficient. Experimental data shows that after encoding using the improved encoding method of the variational autoencoder, the number of bits required for the encoding symbol stream required for transmission or storage in the traditional encoding method is greatly reduced, and symbol redundancy is effectively avoided. The experimental results show that the image research algorithm using variational autoencoder for image 1, image 2, and image 3 reduces the time by 3332, 2637, and 1470 bit respectively compared with the traditional image research algorithm of self-encoding. In the future, people will introduce deep convolutional neural networks to optimize the generative adversarial network, so that the generative adversarial network can obtain better convergence speed and model stability.
A novel Image Security Protection Method Based on DCT Compression Theory and Hyper-chaotic Mapping
Authors: Xue Xianglian , Jin Haiyan
Published: November 2021

This paper studies the current situation of image compression encryption and analyzes the influence of low frequency (DC coefficient) and high frequency (AC coefficient) on image structure in DCT transformation. Based on this, a novel image security protection method based on DCT compression theory and hyper-chaotic mapping is proposed. First, the position of the pixel of the original image is disturbed, and converts the image from spatial domain into frequency domain by the two-dimensional DCT transformation and quantization. Second, change the pixel values by modifying the values of the sign bit of AC coefficient and DC coefficient. At last, the encrypted image is obtained by carrying out inverse quantization, inverse transformation and reverse operation by bit.
Application of Blockchain Technology in Supply Alliance Chain Under Big Data Time Domain
Authors: Huang Youpeng
Published: November 2021

The 21st century is the era of big data. Data is growing at a massive amount of time, and the value of data itself is increasing rapidly. In the era of big data, the demand for security continues to increase, and traditional methods are obviously unable to meet the increasing demand. As a trust-building machine, blockchain technology, especially the multi-center architecture and multi-institutional cooperation scenarios of the alliance chain, satisfies the needs of cross-domain authentication among regions, industries, and enterprises. The purpose of this article is to analyze and discuss the application of blockchain technology in the supply alliance chain under the time domain of big data. This article first introduces the core technology of blockchain through an overview of blockchain theory, and analyzes the status quo of supply alliance chains. Finally, it integrates big data and blockchain technology to explore the supply of blockchain technology in the time domain of big data. Experimental research shows that compared with the traditional supply alliance chain technology, the supply alliance chain that applies the blockchain technology in the big data time domain is more feasible.
Particle Swarm Optimization Algorithm in Improved Electrical Control System
Authors: Tian Xiaotao
Published: November 2021

In today’s social background where high-tech emerges endlessly, various production fields in our country have fully entered the era of mechanical automation and electrical automation, and electrical control systems have been widely used in our country’s electrical appliance manufacturing industry. This paper is based on the theoretical analysis of the particle swarm optimization algorithm. Based on this optimization algorithm, a brand-new particle swarm optimization algorithm is obtained. It is applied to the electrical control system to improve it and makes full use of the improved particle swarm optimization algorithm. The existing electrical control system is optimized. This article firstly analyzes the types of common electrical control systems, puts forward some basic methods to improve the control system, and then explains the effective techniques for improvement, hoping to make reference to the improvement of electrical control systems later in this article. This article first improves the particle swarm optimization algorithm, adding the ability to adjust the control system and dynamic learning factors, focusing on strengthening the later stage of the optimization of the particle swarm algorithm and the ability to converge to improve the efficiency of the calculation. The second is to improve the traditional particle swarm optimization algorithm and update the calculation method of the formula to reduce the possibility of selecting undesirable particles and affecting the optimization results. Finally, through MATLAB and reverse simulation analysis, compared with the traditional electrical control system algorithm, the improved particle swarm optimization algorithm has a faster convergence speed and high control system efficiency. The experimental research results show that the particle swarm optimization algorithm proposed in this paper has a huge advantage compared with other algorithms, and its parameter optimization gives full play to the powerful performance of the electrical control system.
Test Method of Communication Protocol of Standard Group Components of Electric Vehicle Charging Equipment
Authors: Bai Yao , Tang Panpan , Zhang Jing , Zhang Jialin
Published: November 2021

In recent years, the rapid development of the electric vehicle industry has made the research on the communication protocol detection of the standard components of its charging equipment more and more important. The consistency of the charging communication determines whether the charging process can be carried out normally. During the charging process, the inconsistent communication messages of the standard components will directly lead to the failure of the charging process of the electric vehicle charging equipment. The purpose of this article is to study the communication protocol test method of the standard set of electric vehicle charging equipment. This article first analyzes the whole process of DC charging of electric vehicle charging equipment, and determines the detection method combining positive detection and negative detection according to the various stages of communication, and explains it. Then analyze and study the consistency of the communication protocol of the electric vehicle charging equipment standard group components, and determine the test indicators used to test and evaluate the DC charging communication consistency of the electric vehicle charging equipment. Finally, according to the analysis and research on the consistency of DC charging communication of electric vehicle charging equipment, a test plan for testing the consistency of communication is determined. The experimental data shows that the leakage current limit set in the experiment is 30mA, and the maximum error in the actual measurement is 1.1mA. The test results show that the controller on the cable can provide protection in case of leakage, and the measurement error is less than ±5mA.
Research on Real-Time System and Related Graph Task Model
Authors: Xiao Juan , Wang Song , Duan Sheng , Li Shanglin
Published: November 2021

Generally speaking, real-time system is considered to be able to influence the environment by receiving and processing data, and returning calculation results rapid enough, so as to control the environment. In computer science, real-time system describes the software and hardware system affected by time constraints, and its correctness relies on the logical correctness of the function and the time when the result is generated. According to the main characteristics of real-time operating system, such as time constraint, predictability and reliability, it puts forward higher requirements for the time accuracy and reliability of real-time operating system. This paper first introduces the real-time system from its main characteristics, related concepts and scheduling algorithm. Then five classical graph based task models of real-time system are introduced. Finally, this paper introduces the directed graph realtime task model from two aspects of definition and semantics. As an extension of realtime system task model, directed graph real-time task model is considered to be able to provide real-time systems with stronger expressive power and support the formal study of time constraint problems.
Research on Security Communication Technology of Internet of Vehicles Based on 5G Technology
Authors: Xiong Shaojun
Published: November 2021

With the improvement of the economic level and the development of infrastructure, the use of automobiles as a mode of transportation has become more and more common, and the number of cars has continued to grow. Based on this background, the rapid development of intelligent and networked automotive network communication technology, the birth of the Internet of Vehicles technology, has promoted the transformation of the automotive industry. This article gives the corresponding security requirements based on the security risks of IoV communication, briefly introduces the basic methods to realize the security of IoV communication, and proposes the service architecture, PKI architecture and multi-PKI system mutual trust mechanism to realize the security of IoV communication based on this.
Research on the Properties of Lattice-Valued Finite State Machines in Computer Technology
Authors: Hu Zhonggang
Published: November 2021

In this paper, we discuss some algebraic properties of Lattice valued finite state machine and prove that if there are homomorphic mapping satisfying certain conditions between two Lattice valued finite state machines, the first one is strongly connected (cycle), then then the second one is the same. And if the homomorphism is strongly homomorphic, one of the Lattice valued finite state machines is complete if and only if another Lattice valued finite state machine is complete. Discuss the completeness, strong connectivity, circulation and exchange capacity between the product of a Lattice valued finite state machine and the original Lattice valued finite state machine and get some results.
Music Network Data Analysis Based on ISOMAP Algorithm Model
Authors: Zhong Kai , Liu Shangqian , Li Yue , Xu Yanling
Published: November 2021

The development of music is a tortuous process, and the network relationship between each genre and each artist is intricate. In order to have a better understanding of the history of music, this paper tells the stories hidden in the history of music by means of data processing. Firstly, this paper establishes a model to evaluate the similarity between music by using ISOMAP algorithm. At the same time, the forest evolution model was established to mark the most revolutionary musical characters. Finally, using the Page-Rank algorithm, we get the founders of several music genres. It turns out that the figures who led the development of music don’t coincide with the figures who revolutionized music. Through the analysis of this paper, we can more clearly understand the development of music and the evolution of genres.
Application of Intelligent Art Design Technology Based on MBD
Authors: Cheng Weizong , Liu Yanlan
Published: November 2021

Contemporary public art needs to be carefully designed with its unique advantages to achieve its wider diversity, participation and interaction. Based on the MBD process model, the basic process description and evaluation method of process design features are established. Based on the model definition, the key equipment information of process design is the initial data of process optimization. The process design and optimization are realized. It provides an application method based on full 3D model for art design and optimization. An application example of process design is established. Combined with the actual demonstration of MBD, the design optimization process model is an important guarantee for process design. The results show that the distribution of intelligent hardware users in South China accounts for 34.9%, and that in Central China accounts for at least 16.9%.
Internet-assisted English Teaching in Higher Vocational Education
Authors: Niu Xiaowei
Published: November 2021

The rapid development of information technology has brought opportunities and challenges to English teaching. Online teaching has become a trend in language teaching, and it is also the core of the ongoing reform of English teaching. It not only changes the traditional English classroom thinking and teaching methods, but also changes the students’ learning environment and learning methods. At present, many experts and scholars at home and abroad have conducted research on the teaching activities of English network. Researchers have also put in a lot of effort and research to study how to use online platforms to help teach English. This article focuses on the study of multimedia-assisted English teaching in higher vocational education based on the Internet. First, it uses the literature research method to explain the problems in multimedia-assisted English teaching in higher vocational education, then puts forward some relevant suggestions for improvement, and finally uses the questionnaire method to analyze the multimedia A survey on the status quo of English teaching in higher vocational colleges was conducted. The results of the survey showed that the multimedia construction in schools is still good at this stage. Among them, computer equipment accounts for the most, reaching about 39%, and then the slide projector, accounting for about 32%. Regarding whether multimedia teaching can replace traditional teaching, 55% of teachers think that it can be partially replaced, and 31% of teachers think that the two should be combined.
The Design of English Personalized Teaching Platform in Campus Network Based on Big Data
Authors: Shao Changhong
Published: November 2021

With the emergence of technologies such as cloud computing, the Internet of Things(IOT), and educational big data (BD), personalized teaching (PT) has got more technical support. This article aims to explore how to apply emerging technologies to the teaching process, help teachers to carry out PT, stimulate students’ interest in learning, meet students’ individual needs, and break through traditional teaching methods. Through examining and collating a large number of literatures such as education BD and English PT platform, this paper analyses the status quo and needs, and builds a platform based on BD on this basis. The personalized English teaching platform in the campus network is used in practical teaching, and the effect of this platform in practical teaching is tested by comparative analysis. The results show that the English PT platform has realized PT well, enhanced the pertinence and initiative of students’ learning, and improved students’ comprehensive ability.
Experimental Discussion on Fire Image Recognition Based on Feature Extraction
Authors: Cui Yongyi , Qu Fang
Published: November 2021

Video image-based fire detection technology can overcome some shortcomings of traditional fire detection, and has a good development prospect. This paper summarizes the basic principles of image-based fire detection, and analyzes the main features of fire combustion images. According to these features, firstly, the interframe difference method and the watershed algorithm are used to extract the suspected fire image area which may occur. Then, the features of flame image in early fire stage, such as increasing flame area, fluttering edge, irregular shape and flame color, are used as fire recognition criteria. Meanwhile, various image processing technologies and algorithms are used to extract the four main features of the fire, so as to eliminate various sources of interference and further determine whether a fire has occurred. Finally, a variety of different fuels were selected under indoor conditions to simulate fire experiments under different conditions, and the video was recorded. Fire recognition experiments were carried out using experimental videos and some videos found on the Internet. The experimental results show that the extraction and further recognition of suspected fire areas are both effective. However, the experimental simulation environment is relatively simple, and many theoretical and practical problems need to be further studied and solved.
Research on a Robust Backstepping Attitude Controller for Multi-rotor Plant Protection UAV
Authors: Liu Yunling , Ma Yan
Published: November 2021

The plant protection UAV is an important application equipment for precision spraying technology. However, in the process of spraying, the change of its own load will lead to the decline of control performance and disturbance rejection ability. In order to improve the control performance of the plant protection UAV, the application research of robust backstepping control strategy is carried out, and the Robust Backstepping Attitude Controller (RBAC) is designed to force the quadrotor to follow the desired attitude. Through simulation experiments, the control effect of RBAC and the Backstepping Terminal Sliding Mode Controller (BTSMC) in the literature are compared and analysed. The simulation results show that: RBAC can improve the dynamic performance of the system. The average settling time of the system is shortened by 404.663ms, which is 24.85% faster than that of the BTSMC system. Simultaneously, the system is insensitive to external unknown disturbance and has strong robustness.
Control Strategy of Pipeline Robot
Authors: Li Qian , Fang Yongyi , Liu Baoan , Xing Kun , Wang Lijun , Qian Hengjian
Published: November 2021

The detection of pipeline in service is very important, but the existing manual detection has blind spots, long cycle, high risk, low precision and high cost. Therefore, it is very important to develop a mobile detection robot to replace manual inspection. This paper mainly introduces the control strategy of pipeline robot. In this paper, the overall control structure of the pipeline robot system is built, including the design of hardware framework and the design of software implementation process. Hardware design includes the selection design of microcontroller ARM, sensor, motor driver and so on. The software design is mainly the process design of action realization and the frame design of man-machine interactive operation panel structure. After the system construction is completed, the motion control experiment of the pipeline robot control system is carried out to test the walking performance of the pipeline robot prototype in the vertical variable diameter pipeline, and the motion control experiment is carried out to verify the rationality of the mechanical structure of the pipeline robot and the practicability of the control system.
The Application of Satellite Navigation System in Deformation Monitoring
Authors: Lu ChangPing
Published: November 2021

Global satellite navigation system has become one of the top technical means in the world. The use of satellite navigation in many fields, such as deformation measurement, civil navigation, search resources, geodetic survey, auxiliary precision engineering monitoring and so on, can play its high precision positioning, all-weather monitoring and other technical characteristics. At the same time, satellite navigation system is combined with modern information technology. Internet technology and so on, which realizes the automatic collection, transmission, processing and analysis of safety monitoring data, and the application efficiency is maximized. The present situation and application of satellite navigation system to monitor the deformation of high-rise buildings are studied in this paper. Nowadays, more and more high-rise buildings in the world have sprung up like bamboo shoots. Therefore, how to realize the satellite navigation system to carry on the all-weather, the high precision, the high efficiency monitoring to the high-rise building, carries on the diagnosis to the dangerous signal in time, timely carries on the forecast to the future possible danger and the timely stop loss, this has the very important realistic significance. By reading the literature, the paper expounds the concepts of satellite navigation system, satellite navigation system and Internet technology in detail. The paper mainly takes the high-rise building scaffold as the object of deformation monitoring, and expounds the advantages and reliability of GPS as high-tech for deformation monitoring of high-rise buildings. Finally, through experimental design, the recognition of GPS technology by comparative method reflects the inestimable position of satellite navigation technology.
A Method of Single-terminal MMC Single-pole Grounding Protection for DC Distribution Network Based on Multi-class Similarity Analysis
Authors: Zhang Wei , Cao YaFei , Fan YuanChun
Published: November 2021

Based on the analysis model of single-pole to ground fault occurred in single-ended MMC DC distribution network, the characteristics of single-pole to ground fault are studied. The similarity of positive and negative current between the fault feeder and the non-fault feeder, the similarity of fault current between the fault feeder and the non-fault feeder, and the similarity of positive and negative current sum between the two feeders are analyzed. Based on the differences among the three types of similarity, a new method of single-pole grounding protection for DC distribution network with MMC based on multi-type similarity analysis is proposed. The simulation results show that this method can accurately determine the fault feeder, and has the characteristics of strong anti-interference ability, simple calculation and easy implementation. It can effectively solve the problem of single-pole grounding protection of DC distribution network and effectively improve the safety and reliability of power supply of DC distribution network.
Influence of the beam oscillation parameters on the porosity of electron beam freeform fabricated titanium alloy SPT-2
Authors: Gudenko A V , Sliva A P , Shishkin D V
Published: November 2021

The effect of electron beam oscillation on the formation of metal during electron beam freeform fabrication has received practically no attention. Nevertheless, it is a variable technological tool that allows to significantly influence the formation of metal during EBFFF process, including the probability of defects formation. The effect of the focus current, the form, and the frequency of the beam oscillation on the formation of pores in single beads by method of electron beam freeform fabrication of the titanium alloy SPT-2 on the substrate of the alloy VT6 was investigated. The porosity of the obtained beads was studied using x-ray images. It was found that too deep an arrangement of the focal plane relative to the substrate surface leads to excessive pore formation. Reducing the oscillation frequency from 1000 Hz to 100 Hz made it possible to completely get rid of the pores in the metal. The use of a spiral-shaped oscillation made it possible to reduce the probability of pore formation in comparison with an oscillation in the form of concentric circles.
Investigation of the thermal state of the elements of a technological electron beam gun under long–term operating conditions
Authors: Kharitonov I A , Goncharov A L , Titarev E K , Nekhoroshev A V
Published: November 2021

The paper presents the results of a study of the thermal state of the elements of the cathode assembly of the ELA–15 welding electron gun. It was revealed that in short–term operating modes of the gun (up to 60 minutes) at any energy parameters of heating the hexaboride cathode, it is possible not to use forced cooling of the cathode assembly. The case temperature in such modes did not exceed 30°C. The increase in the temperature of the gun body occurred 15 minutes after the start of heating the cathode. In long–term operating modes with forced cooling of the gun, the temperature of the gun body increased by 2 – 3°C and remained stable throughout the operation. When the cooling was turned off, the temperature of the gun body reached a critical value in 60 minutes. The section of natural cooling of the cathode obtained in the work, which appears when the heating of the cathode is stopped, is well approximated by a power function. It is convenient to use this dependence to verify the mathematical model of the thermal state of the electron gun.