bluuebunny/crossref_metadata_2025_split huggingface dataset:
Design of Internet of Vehicles Authentication Scheme Based on Blockchain
Authors: Mao Chen , Xie Kaiyu , Gao Lei , Wan Mingjiang , Liu Shuxian 
Published: January 2021

Abstract
While the Internet of Vehicles brings convenience to people, it also brings new challenges to vehicle safety. In view of the security problems of data destruction, replay, counterfeiting and monitoring in the information exchange of the Internet of Vehicles, the article aims to improve the security of identity authentication of the Internet of Vehicles, and relies on the framework of Hyperledger Fabric and divides it according to the characteristics of its modular components. Different participating nodes have designed a model of Internet of Vehicles application service platform based on Hyperledger Fabric based on this; using the decentralization of blockchain technology and the non-tamperable characteristics of the data to endorse the vehicle's identity authentication information as a substitute. The traditional CA certification center combines the blockchain technology with the traditional identity authentication technology based on cryptography, and proposes a solution for the Internet of Vehicles identity authentication based on the blockchain technology. Finally, the article makes a security analysis of the scheme, which shows the effectiveness of the method.
Efficient Fully homomorphic encryption scheme using Ring-LWE
Authors: Xin Dan , Ji Jingzhou , Jing Feng , Gao Mei , Xue Bin 
Published: January 2021

Abstract
Data can be stored and processed in an encrypted format using fully homomorphic encryption, which makes cloud computing provider can process data well without even knowing data information. However, most existing homomorphic encryption schemes based on ring learning with errors, focus on the special classes of rings, such as power-of-two cyclotomic rings, which significantly limits its application efficiency in cloud computing. Therefore, in this letter, to solve this problem above, an efficient fully homomorphic encryption scheme is proposed based on ring learning with errors in arbitrary cyclotomic rings. Particularly, a “somewhat homomorphic encryption” scheme is firstly proposed based on ring learning with errors. A novel fully homomorphic encryption scheme is further presented using key-switching. With theoretical and experimental verification, the proposed scheme has advantage of high efficiency of encryption and decryption. The security of our scheme strictly reduces to hardness of decision ring learning with errors problem in the random oracle model.
Research on Civil Aircraft Customer Service Application Based on Augmented Reality Technology
Authors: Yihui Cui , Hongli Sun , Qingmiao Wang , Weixuan Yu , Yuan Liu , Hongchao Wang 
Published: January 2021

Abstract
Civil aircraft customer service mainly includes technical publication support, Aircraft Operations Support, and Aircraft Customer Training. Using Augmented Reality technology to carry out customer service work can effectively improve work efficiency, reduce customer use costs, and shorten aircraft maintenance cycles. This paper makes a preliminary exploration of the application of Augmented Reality technology in civil aircraft customer service work, and gives the application framework of the Augmented Reality civil aircraft customer service system to provide help for the future upgrade of civil aircraft customer service technology.
Analysis of design points of deep learning supported by maker space
Authors: Dai Haoran , Gu Yuanjie 
Published: January 2021

Abstract
The creator zone was a combination of practical meaning and ideas of reform and innovations. It pursued a cultural pattern of sharing, development, innovations, improvement. In the current stage of the education reform, the creator zone always supported students' deep learning and lifelong learning concept training. It constantly broadened the new territory in the students' main consciousness, and combined the classroom resources with the network resources, so that students could understand the knowledge from different angles and layers. Compared with the traditional teaching method, the creator zone education had an undeniable advantage. It could show the status of the student as the main body, stimulate the student's interest in learning, and make the student turn from a passive accepting to an active inquiring person. For this reason, based on the experience of the creator zone education, this article talked about the relationship between the creator zone and the deep learning, and provided a new teaching idea for other teachers.
Research on computer basic teaching in Higher Vocational Education under the background of flipped classroom
Authors: Wu Jie 
Published: January 2021

Abstract
In recent years, flipped classroom appears more and more in the teaching process. Flipped classroom can also be called inverted classroom, which gives students the decisionmaking power of learning and improves the efficiency of classroom. This paper will elaborate and analyze the current situation of computer technology course teaching in Colleges and universities and the application of flipped classroom in teaching. This paper discusses the problems existing in the teaching process of computer technology and education course and how to solve the problems effectively with flipped classroom, so as to promote the improvement of students' performance and teaching level.
Analysis of learning behaviour based on edX open data
Authors: Feng Jian , Zhao Yupeng 
Published: January 2021

Abstract
Since 2012, the continuous development of MOOC has triggered new thinking and research in many aspects, and the massive data it generates provides a foundation for learning behaviour analysis and education data research. edX is a new field of Web education jointly developed by Harvard University and MIT integrating educational resources. Based on the first MOOC open data set released by edX, through the use of data analysis methods, the learners in edX are studied from the three aspects of learner type, learner characteristics, and learner behaviour to show the actual situation of MOOC learning.
Study of the stability for Drug Delivery Models
Authors: Salih Hero W , Nachaoui Abdeljalil 
Published: January 2021

Abstract
In this work, mathematical models of drug delivery are presented. We are particularly interested in studying the stability of these models to release the drug in a polymer matrix and detect its transfer to the overall biological tissue. These results are illustrated on two models. In order to gain protocol treatment, instead of using the optimal control theory, Lyapunov’s stability theorem is used to study the stability of the first nonlinear system. For the second, we proceed by establishing the properties of the equilibrium point (which is strongly related to the stability of the nonlinear system) by modifying the system into a canonical equation and studying the spectrum of its Jacobian matrix to show that the system is stable.
Improvement Strategy to Improve Relay Protection Reliability in Smart Substation
Authors: Li Xuanyi , Li Tiecheng , Li Junqiang , Li Huifeng , Huang Cuiyan 
Published: January 2021

Abstract
Due to the continuous development of science and technology in China, technological innovations have started in various fields. In the background of this era, power companies have begun to build smart grids. As a key link in the construction of power grids, substations will inevitably follow the trend of smart development and become the focus of current power companies. However, relay protection determines whether smart substations can achieve efficient operation. This article analyzes the main points of smart substation relay protection, and draw the improvement strategy of smart substations on relay protection, which includes the protection of the transformer, voltage limit delay, and line protection, thus promoting a healthy development of smart grids in China.
Research on the Cause Analysis and Improvement Measures of Measurement Error Based on Model Forecast
Authors: Ning Li , Haiyang Liu , Yongchao Wang , Qiaoya Li 
Published: January 2021

Abstract
The accuracy of power measurement affects the economic benefits and operating costs of power supply companies, and even affects corporate decision-making. Analyzing the causes of errors in measurement data and making improvements to reduce errors is of great significance to both power companies and users. The article analyzes the causes of power measurement errors, and proposes improvement measures to reduce the errors.
Design of Intelligent Header for Longitudinal Axial Flow Corn Combine Harvester
Authors: Wu Changzhong , Ge Fan , Shang Guangchao , Wang Guitao , Zhao Mingpeng , Wu Liang , Guo Hengshuai 
Published: January 2021

Abstract
The header is the core part of the corn harvester. This time, the main theoretical components of the header are systematically analyzed and designed to provide a basis for the manufacture of the corn harvester. The header part includes a grass divider, a stem pulling rod and a clamping conveyor chain. Stick picking is a key component of the ear picking device of a corn harvester. Therefore, it is very important to study the relationship between the movement state of corn stalks between pick sticks and the structure and movement parameters of ear picking.
Research on Piano Batch Scheduling Method Based on Constraint Model
Authors: Xuan DU , Tian-yi LIAO , Bao-wan LI 
Published: January 2021

Abstract
Research on the batch scheduling problem of piano production, with the goal of optimizing the production cycle, using a two-segment matrix coding method to solve the problems of batch division and sub-batch sorting, combining multicolor sets with genetic algorithms, and proposing a genetic algorithm based on model constraints (MCGA) in order to solve the problem of slow solution speed and low efficiency in batch scheduling problems. And by comparing the production cycle of overall scheduling, equal batch scheduling, and unequal batch scheduling, the experimental results show that non-equal batching has more advantages, and the feasibility and effectiveness of the algorithm are shown through example simulation.
Research on Transverse Vibration of Hoisting Vertical Rope
Authors: Ma Chi , Song Chunyang , Yao Jiannan , Xiao Xinming , Jiang Yuqiang 
Published: January 2021

Abstract
By analysing the source of vibration of the main rope, and deriving the excitation function of the head sheave and the cage guides, a physical model of the vibration of the main rope is established. The generalized Hamilton principle is used to establish the transverse and longitudinal coupled vibration equation of the main rope. Considering the influence of rigid cage guides and head sheaves excitation on the main rope vibration, the main rope vibration control equation is discretized and solved based on the Galerkin truncation method to obtain the main rope transverse vibration displacement curve. At the same time, the machine vision image matching method is used to realize the measurement of the transverse vibration of the vertical rope, and the pixel coordinates of the target are converted into actual physical coordinates through coordinate conversion, thereby calculating the transverse vibration displacement of the vertical rope. Finally, the results of comparison experiments show that the above matching algorithm has strong practicability for measuring the transverse vibration of the hoisting main rope.
Summary of the performance of CNC turning tool chipbreaker
Authors: Chen Zhimin , Chen Shunqing 
Published: January 2021

Abstract
Most CNC tools have chip breakers, which play a very important role in CNC machining. This article will introduce the development history of the chipbreaker, and classify and summarize the chipbreaker. Then this article starts with the cutting parameters, the geometric parameters of the chip breaker, and the geometric angle of the tool, and analyzes the influence of these factors on chip breaking.by these factors. Subsequently, the performance of the chip breaker is evaluated and the rationality of chip breaking of the chip breaker is analyzed. Finally, it is concluded that the blade geometry is ever-changing. Due to different factors, it is necessary to consider multiple aspects when designing the geometry.
Vibration Analysis of Winding Hoisting System based on ADAMS/Cable
Authors: Ma Chi , Yao Jiannan , Xiao Xinming , Di Xiao , Jiang Yuqiang 
Published: January 2021

Abstract
In order to study the lateral vibration characteristics of the vertical wire rope of the winding hoisting system, a virtual prototype model including drum, wire rope, head sheaves and guides is established by ADAMS/Cable module. Dynamic simulation of winding hoisting process is carried out by external solution with ADAMS/Solver simulation control language. The validity of the model is verified with a winding hoisting test-bed, the dynamic behavior of the hoisting system under variable speed conditions is analyzed, and the lateral vibration law and the influence on the longitudinal vibration of the suspension rope under the speed change are obtained.
First-principles study of β-titanium alloy TiX (X=Al, Ni, Fe) for key parts of automobile engines
Authors: Liu Ying , Liu Li 
Published: January 2021

Abstract
As we all know, titanium alloys have excellent comprehensive mechanical properties, such as high ductility, rigidity, and density, which are superior to aluminium alloys. However, due to their high price, titanium alloys have not been able to be used in automobile engine bodies, but on small engine components, such as titanium alloys have been well used in connecting rods, valves, engine exhaust systems and fasteners. This article uses a new alloy design concept to design a new beta titanium alloy, hoping that it may be applied to small parts of automobile engines. Based on the density functional theory, the first-principles calculation method was used to study the structure and stability, formation heat, binding energy and elastic properties of TiX (X = Al, Ni, Fe) β titanium alloy. The results show that these types of β titanium are structurally and mechanically stable. By using Voigt-Reuss-Hill (VRH), the theoretical elastic constants Cij, bulk elastic modulus B, shear modulus G, Young’s modulus E, Poisson’s ratio υ of these β titanium alloys are further obtained. The ductility and plastic toughness of these kinds of β titanium alloys are analysed, and the β titanium alloy system with excellent comprehensive performance is determined, which also provides a basis for the next element selection of the β titanium alloy system for automobile engines.
Design of Planar Wideband Balun Model
Authors: Zhou Fengdao , Guo Ling , Bai Ranming , Wang Dan 
Published: January 2021

Abstract
In order to meet the practical requirements of the balun structure while improving the output balance and isolation, an improved planar broadband balun model was designed based on Marchand balun. Aiming at the situation that the phase transition speed of the two output terminals is not synchronized due to the input transient transmission of the microstrip line, the method of compensating the microstrip line by loading the ground short-circuit ends of the two couplers is used to adjust the phase speed to synchronization and thereby improve the output balance. At the same time, a single-layer planar structure is used to reduce the vol-ume of the balun structure, and isolation circuits are introduced at the input and output ends to optimize the isolation. Simulation verification based on the model showed that the minimum isolation at the working frequency of 2.969GHz-3.702GHz was reduced to -24.53dB, and the phase imbalance at the output fluctuated between+0.32 °and -0.99 °, and the amplitude unbal-ance degree does not exceed 0.08db. The balance does not exceed -0.08dB. Both output bal-ance and isolation have been significantly improved.
Load simulation analysis of a new erection system based on the gas-assisted drive erecting scheme
Authors: Wu Qipeng , Ma Cong , Li Liang , Yang Minbo 
Published: January 2021

Abstract
To improve the traditional erecting process with lower velocity and smaller power density, a new erection system is designed based on the hybrid drive of gas and electric cylinder, witch could erect quickly without increasing the power of the whole machine. According to the prescribed rotational motion and the rotational differential equation of the erection mechanism, the computational models of the related characteristic parameters in erection process were set up. Taking some parameters of a missile as boundary conditions, the models were simulated in MATLAB, and the parameters were obtained graphically. The results can offer references for the design of a new erection mechanism based on pyrotechnics.
Attitude determination of sanitation sweeper in working process
Authors: Ying-kai Niu , Zhi-jian Su , Yu-zhuang Guo 
Published: January 2021

Abstract
During the working process of the sanitation sweeper, it needs to be parallel to the curb and keep a certain distance to complete the cleaning work, so the driver must observe whether the distance between the side of the vehicle and the curb meets the working requirements at all times while considering the longitudinal driving. This will undoubtedly increase the workload of drivers, but also bring a lot of driving difficulties, easy to drive fatigue, resulting in traffic accidents. In this case, it is necessary to use the auxiliary driving technology to assist the sanitation sweeper driver to complete the cleaning work. Based on the actual working condition of sanitation sweeper, a scheme suitable for judging the attitude of sanitation sweeper is proposed. A line laser assisted vision rangefinder is designed to judge the attitude of sanitation sweeper. This scheme is simple and easy to operate, and the image processing speed is fast, which is suitable for popularization.
Simple fabrication of RGO/TiO2 nanocomposite with homogenous dispersion
Authors: Tao Sun , Xiaojuan Jiang 
Published: January 2021

Abstract
Homogeneous dispersed RGO/TiO2 nanocomposite was synthesized using precursors of graphene oxide (GO) and Ti(SO4)2 and reducing agent of urea solvent by situ hydrothermal reduction method. The X-ray diffractometer (XRD) and fourier transform-infrared (FTIR) spectra were used to characterize the microstructure of RGO/TiO2 nanocomposite, and transmission electron microscope (TEM) and fieldemission scanning electron microscope (FESEM) were used observe the microtopography of RGO/TiO2 nanocomposite. The effect of urea mass ratio on number of TiO2 in RGO/TiO2 nanocomposite was investigated. It is revealed that the TiO2 nanoparticles efficiently disperse on the surface of RGO (reduced graphene oxide) sheets and RGO/TiO2 has close interfacial contact.
Research on Voltage and Current Acquisition from and Feedback Protection of Steam Recycling System of Power Plant Cooling Towers
Authors: Shiguang Li , Luyao Zhou , Zhanming Lu , Yanan Wang , Bo Gui , Kaibin Xu 
Published: January 2021

Abstract
The author introduces a technical method that combines dual-loop acquisition of voltage and current in the high voltage circuit and CPU automatic regulation of frequency duty ratio with high-precision voltage-to-frequency conversion chips. It is proposed to improve the accuracy of voltage and current acquisition from the steam recycling system of power plant cooling towers as well as the real-time performance, and to achieve long-term stable operation of the steam recycling system. Firstly, full wave bridge rectifiers and high voltage resistors are used to rectify high voltage into low voltage and current, which helps solve the problems involving insulation of high-voltage acquisition. Secondly, the overall circuit for voltage and current acquisition and feedback protection is designed according to the control system of the steam recycling system and the pulse frequency counting method. Finally, experimental data of output voltage, current and frequency are obtained through experiments and testing to analyze the accuracy and real-time performance of the overall circuit. The experimental results show that this method can effectively improve the accuracy of voltage and current acquisition and the real-time performance of overvoltage and overcurrent protection in the steam recycling system.
Fitting of Resistance Model of Underwater Electrodes
Authors: Guo Xiaoyu , Zhang Guoguang , Yang Chong , Jiao Yucheng , Jiang Chunhua 
Published: January 2021

Abstract
This paper measures and analyzes the resistance of a circuit formed by underwater metal electrodes under a low-frequency condition. The conditions for ignoring displacement current and the existence of Ohm’s law are discussed. On this basis, three expressions of resistance are proposed based on the measured data, and the three expressions are analyzed according to their different application emphases. The results show that under partial constraints, the three resistance expressions proposed can accurately calculate the resistance of the circuit formed by underwater metal electrodes.
Analysis of Unsteady Flow Field in Rotating Detonation Turbine Engine
Authors: Ji Bing , Wang Zhiduo , Li Jun 
Published: January 2021

Abstract
The rotating detonation turbine engine is a research hotspot in recent years, but the research is mainly at the phase of theoretical analysis. In this paper, the influence of the circumferentially rotating pulsating flow field on the performance of the turbine is studied by numerical simulation. The results show that the uneven turbine inlet flow will increase the working load of the stator vane, but will produce greater flow loss. At the same time, the strength of the channel vortex and the tip leakage vortex inside the rotor is also increasing. The mass flow rate and work efficiency of the turbine decrease with the increase of the unevenness of the flow field.
Design of micro resistance measurement system
Authors: Li Qingrun , Wang Shudong , Chen Yun , Wang Hao , Liu Shen 
Published: January 2021

Abstract
With the continuous progress and development of the electronics industry, the number and types of electronic components are also increasing. As the most widely used device in electronic components, the accuracy of resistors greatly affects the performance of the product. Therefore, we need to design a highly accurate and intelligent micro-resistance measurement system to meet the needs of the current society. This paper designs a micro-resistance measurement system. The system uses ST89C52 single-chip microcomputer as the data processing and control chip, and uses a constant voltage source to provide a stable voltage for the resistance to be measured. The measurement module of this system is based on the RC oscillator circuit, the pulse time is measured by the pulse counting method and then the measured frequency is calculated, because the frequency is a digital quantity that the single-chip microcomputer is relatively easy to identify and process; the selection module is mainly controlled by the 51 single-chip microcomputer. The gears correspond to different non-polar capacitors; LCD1602 displays the value and unit of the measured resistance. And the system uses the C language for software design, at the same time design the corresponding flow chart and write the complete source code for programming; finally, the corresponding physical objects are produced and corresponding debugging is carried out, and the debugging results meet the design requirements of the subject. By comparison, the general measurement methods have the disadvantages of complex calculations, and it is not easy to realize automatic measurement and intelligent. It has been verified that the system adopts these modules to make the test instrument more accurate and intelligent to achieve the required requirements.