bluuebunny/crossref_metadata_2025_split huggingface dataset:
Research on the location of waste battery recycling center for new energy vehicles based on a heuristic algorithm of greedy take-off
Authors: Wei Qian , Zhang Mengya , Zhang Yao , Xiong Xinyi , Qin Jiarui 
Published: June 2020

Abstract
The peak period for the decommissioning of new energy vehicle power batteries in China is approaching, and it is imminent to establish a complete and efficient waste battery recycling system. In order to improve the recovery efficiency of waste batteries in China, this paper constructs a new type of waste battery recovery system, and proposes a new method to solve the location problem of the waste battery recovery center by using a method of goal ranking and a heuristic algorithm of greedy take-off. The grey prediction method of amplitude compression is used to simulate and predict the total battery recycling amount of each recycling station in a city, and then establishing a dual-target location model with the goal of maximizing total revenue and optimizing brand serviceability. Finally, the model is solved by the heuristic algorithm of greedy take-off to obtain the optimal location scheme of recycling center, which proves the feasibility of the model.
Network Topology Monitoring Method of Large Scale Autonomous System Based on OSPF Protocol
Authors: Dong Yue , Zhong Lei 
Published: June 2020

Abstract
In order to monitor the OSPF (Open Shortest Path First) large-scale autonomous system in real time, for the shortcomings of current topology discovery methods based on OSPF protocol, firstly a hierarchical modelling method of OSPF large-scale autonomous system is proposed, which describes the autonomous system quantitatively. Secondly, a topology generation algorithm based on the link state database and an autonomous system model comparison algorithm are put forward in this paper. Finally, the experiment of monitoring the autonomous system in the actual network is carried out. The link state database is collected on any router in each OSPF area. The experiments show that the model and algorithm can be used to obtain the network topology map completely and accurately without the extra network burden, and to monitor the changes of network topology in real time. The model and algorithm proposed in this paper are helpful to realize the topology generation and monitoring of the large-scale autonomous system.
Design of Control System for Pressure Vessel Inspection Robot Based on PLC
Authors: Tian Weiwen , Zhang Wenzhi , Zhao Xu 
Published: June 2020

Abstract
In order to improve the detection efficiency and quality of pressure vessels, a pressure vessel inspection robot control system based on programmable logic controller PLC is designed. First, the basic structure of the inspection robot is briefly introduced, and then the software and hardware of the control system of the inspection robot are designed in detail. Hardware design includes overall hardware design, hardware selection, hardware electrical circuit design, actual layout of hardware, etc. Software design includes software design process and program design, among which Mitsubishi FX5U series PLC and FX5-40SSC-S motion control module are the core of the control system. Finally, it is experimentally verified that the control system can control the detection robot well and has high engineering value.
Tactical preference based objectives for solving an evasion problem of fighter in air combat
Authors: Yang Zhen , Zhou Deyun , Zhao Yiyang , Kong Weiren , Zhang Kai , Zeng Lina 
Published: June 2020

Abstract
Evasive maneuvers of fighter only consider the objective of miss distance in traditional air combat decision problems. The amalgamative tactical demands of achieving self-conflicting evasive objectives in actual air combat are taken into account in this paper. A method to generate a strategy of evasive maneuvers based on tactical preference is proposed. Tactical preference is given to higher miss distance, less energy consumption, and higher terminal superiority. The evasion problem in air combat is defined and reformulated into a multi-objective optimization problem, which is solved by a multi-objective evolutionary algorithm. Simulation results show the feasibility and effectiveness of the proposed method, and a set of approximate Pareto-optimal solutions are obtained to satisfy the tactical preference.
Study on Fault Diagnosis of Optical Measurement Equipment Based on Fault Tree Analysis
Authors: Hu Changde , Wang Zhaohui , Zheng Xiaotian , Cao Xiaojun , Ding Meng 
Published: June 2020

Abstract
A kind of method about fault diagnosis of optical measurement equipment based on fault tree analysis(FTA) is proposed. Firstly the system is decomposed into several subsystems by control loop, and then generated the fault tree for each control loop. The whole fault tree of the system is obtained by the event status with fault tree of all control loops deduced. Moreover, a set of system platform was developed with the Visual Basic software. Finally, a photoelectric encoder fault case of optical measurement equipment is analysed with the platform and method. It shows that the proposed method in this paper improves the automation of fault tree construction and has certain utility and better future for application.
A study of personalized training strategies for vocational education based on big data systems
Authors: Shi Yang , Xie Jingwei 
Published: June 2020

Abstract
The investigation and analysis of personalized training of vocational education based on big data system has the characteristics of simplicity, operation and persuasiveness. This article comprehensively elaborates on the characteristics and meaning of personalized education, combines the big data analysis method and selects five colleges and universities in Guangzhou to conduct a questionnaire survey, to find out the problems in the personalized training of vocational education, and to propose measures.
Design and Implement of Automatic Test Environment for ETCS On-board Equipment
Authors: Renpu Xue , Hongliang Geng , Changbo Ke , Kai Yang 
Published: June 2020

Abstract
ETCS on-board equipment is a typical safety-critical system, its reliability plays a vital role in the safe driving of trains. ETCS on-board equipment has huge functions, complicated structure, a large number of test cases and difficult implementation. Introducing automated testing into on-board equipment testing is a problem that needs to be solved urgently. Based on the interface and functional characteristics of ETCS on-board equipment, this paper adds the design of test management unit, the division of test engine and the separation of test scripts based on the existing test environment, and develops a set of simple and efficient ETCS on-board equipment dedicated automation test environment. The application shows that this set of test environment realizes the automatic test of all test sequences of ETCS on-board equipment, which can significantly improve the test efficiency, reduce the tester’s work intensity, and improve the test accuracy.
Structural design and motion simulation of walking aid
Authors: Ma Ke , Li Mengyuan , Yuan Minghai , Lin Junjie , Pei Ziqing 
Published: June 2020

Abstract
The advantages and disadvantages of existing walking aids on the market are analyzed and improved. The overall structure is designed and analyzed, and the length of each segment is considered comprehensively from the perspective of adapting to human body. The 3D model was established in SOLIDWORKS, and the motion simulation analysis was conducted in ADAMS to obtain the speed, step distance and other parameters during the movement. The results were compared and analyzed with the applicable human motion parameters to verify its feasibility.
Wearable respiratory strain monitoring system based on textile-based capacitive strain sensor
Authors: Jun ZHONG , Chun-na LI , Wen-liang ZHU , Hong ZHOU , Yong-feng LIU , Xue-feng HAN 
Published: June 2020

Abstract
Respiratory state analysis based on respiratory strain monitoring plays an increasingly important role in the assessment of the continuous dynamic physiological state of the human body. The proposed respiratory strain monitoring system uses the STM32F411 single-chip microcomputer as the main control chip, combined with the FDC2214 capacitor-to-digital converter, collects the capacitance value of the flexible cloth-based capacitive strain sensor through the IIC method, and sends the collected result to the upper computer for processing and analysis through Bluetooth. The device collects the respiratory strain signal of the chest in three motion states: stationary, walking, and running. Through data acquisition and algorithm processing, it can clearly display the waveform of respiratory strain, and the extraction accuracy of the respiratory rate is ±1rpm. The experimental results show that the system has good stability and accuracy, strong anti-interference ability, and can meet the requirements of continuous dynamic high-precision respiratory rate monitoring.
Analysis on Thermal-Force Coupling Performance of a Vehicle IGBT Packaging Module
Authors: Chen Yajuan , You Fei 
Published: June 2020

Abstract
Based on the basic theory of thermodynamics and finite element, the thermal characteristics and structural mechanics simulation are carried out taking an automobile IGBT packaging module as the research object. Then the distribution of temperature, thermal stress and deformation of IGBT are obtained. The thermal force coupling performance of the structure is judged according to the analysis results, so as to provide theoretical reference for the design and selection of subsequent radiators.
Research on Public Facilities Design Based on Human-Computer Interaction Emotional Concept
Authors: Wang Zhenyu , Guo Xiaofang , Luo Jianwen , Feng Linhao , Lyu Jianhua 
Published: June 2020

Abstract
In the current era, human-computer interaction design has penetrated into environmental design and it has played a huge role. At The application of planning in environmental design has become the focus of people’s research. Public facilities are an important carrier of In addition to being practical, it also undertakes the task of beautifying the city. When new social phenomena and residents’ needs change, under the restrictions, functional compounding of public facilities is the inevitable way. This article analyzes the status of public facilities an The reasons for the introduction of functional composites in the design of public facilities are discussed, and the integration of emotional c The article comprehensively analyzes and summarizes the research on the human-computer interaction design of public facilities in the env The integration of technology and technology is to provide users with a convenient and practical service experience on the basis of aestheti The product of a higher level of human needs, its application in design meets the emotional communication of people, people and product The design must be planned according to the characteristics of the overall environment, combining the colors and forms of the surrounding One consideration, so that it cannot only meet the emotional concept and interaction design of environmental design, but also give full pla Function and utility.
The Distribution of Pressure and Vorticity of Impellers with Single-Rotary and Multi-Rotary
Authors: Wang Yue , Liu Jin , Xu Juan , Ren Wanlong 
Published: June 2020

Abstract
The screw-type centrifugal pumps with different impellers are studied. The structure of single-rotary and multi-rotary impellers are designed by the CAD method. The governing equation of fluid flow and SST k-ω model are applied to simulate the internal flow field by computational fluid dynamics method. The pressure distribution and vorticity distribution are calculated and analyzed. It is found that the pressure distribution and vorticity distribution of the two types of impellers are significantly different. The pressure distribution of single-rotary impeller is relatively uniform. The vorticity of single-rotary impeller is larger than multi-rotary impeller.
Effect of pre-swirl stator on wake flow of an ducted propeller
Authors: Xu Juan , Hao Zongrui , Wang Yue , Ren Wanlong , Liu Gang 
Published: June 2020

Abstract
Numerical simulations of wake flow field of ducted propellers with and without pre-swirl stator are carried out by means of k-ω model. Then the velocities and the pressure fluctuations of the wake flow at different positions from the propeller are analyzed. The result shows that both the near-propeller blade velocity and the overall averaged velocity are obviously increased by the pre-swirl stator. Moreover, the pre-swirl stator can improve the surface pressure distribution near the blade but at the same time can enhance the pressure pulsation in the wake flow, especially at the downstream region.
3δ principle and boxplot method are used to estimate the cost interval of tower replacement technology
Authors: Li Jianqing , Zhu Xiaohu , Zhao Chen , Kang Jian 
Published: June 2020

Abstract
The replacement of tower is an important part of the technical reform of power grid lines. To analyze the rationality of the cost of the technical reform of tower, it is necessary to deal with the abnormal engineering data based on the cost data of previous projects. In this paper, the unit cost of tower replacement is sorted out by using 3δ principle and boxplot method, and the reasonable cost range is obtained to provide a basis for project investment.
Application of Ejection theory in Civil Aircraft and CFD simulation of an ejector
Authors: Bao Guangyu , Zhu Hongyu 
Published: June 2020

Abstract
The ejection theory is widely used in industrial fields such as drainage, cooling, vacuum. Many ejection devices are applied in civil aircraft due to their simple design and easy layout. This article introduces several types of ejection applications in multiple systems of civil aircrafts. Then a CFD simulation of the APU (Auxiliary Power Unit) compartment drainage ejector is conducted to analyse the influence on the drainage function by different arrangements.
Effect of Micro-arc Oxidation Time on Corrosion Resistance of Magnesium Alloys
Authors: Li Shihao , Liu Xin , Liu Shengjun 
Published: June 2020

Abstract
This experiment investigates the effect of time on the quality of the film during the micro-arc oxidation of magnesium alloys. The micro-arc oxidation surface morphology, the thickness of the film layer, and the influence on the corrosion resistance of the magnesium alloy were studied at different times. The experiment found that when the micro-arc oxidation time is controlled at 9 minutes, the surface quality of the film layer is the best, and the improvement of the corrosion resistance is more obvious.
The study of multi-parameter optimization design of ducted propeller
Authors: Hao Zongrui , Ren Wanlong , Xu Juan , Liu Gang , Wang Yue 
Published: June 2020

AbstractUsing the prediction method of surface element method and particle swarm optimization algorithm to study the multi-parameter optimization design of ducted propeller. Hicks-Henne function and Bezier function are used to fit the parameter curve of the ducted propeller. Taking the open water efficiency of the ducted propeller as the optimization target, the numerical simulation was performed. By analyzing the result, the multi-parameter coupling optimization design of the ducted propeller can be achieved. After optimization, the open water efficiency and thrust coefficient at the design points have been improved. Among the two fitting methods, the Bezier function gives a better result, which is consistent with the actual engineering. Within the range of the common speed coefficient of each ducted propeller, the efficiency and thrust are improved and meet the requirements. The feasibility and effectiveness of the multi-parameter coupling design of the ducted propeller are verified.
Standardization Construction of Fire Information Communication Operation and Management Based on Remote Communication
Authors: Yu Muzhi 
Published: June 2020

Abstract
With the continuous development of modern information and communication engineering, the management of the whole process of the standardization construction of fire information and communication operation management pays more attention to the intensification, standardization and standardization of project management. This is because fire fighting communication is an important part of fire fighting work and is the nervous system of fire fighting dispatch and organization and command. Therefore, the whole-process management can be sorted out, standardize the management process, establish a centralized management platform, and cover various aspects such as reserve project initiation, plan issuance, construction implementation, acceptance and payment, etc. However, in the standardization construction of individual fire information communication operation and management, the standardization construction of communication management system has not received high attention from relevant staff. This paper analyzes the current situation of standardization and disorder of fire fighting information communication operation management based on remote communication, and puts forward suggestions and solutions, which are conducive to the sustainable development of fire fighting industry in the future.
Construction of intelligent weapon system effectiveness evaluation index system based on Delphi method
Authors: Han Yueming , Liu Tie lin , Li Yuan , Zhang Zhi jie 
Published: June 2020

Abstract
In view of the lack of efficiency evaluation index system of intelligent weapon system and insufficient quantification and refinement of technical indexes, the research on the index system will be carried out from the perspective of completing the task of intelligent weapon system, and the verification index system will be established to realize the evaluation of weapon system efficiency, clarify the use background of intelligent weapon system, and analyze the strength composition of intelligent weapon system, Finally, Delphi method is used to build the effectiveness evaluation index system of the intelligent weapon system, which can be used as a reference for the comprehensive evaluation of the capability of the weapon system.

CLC number: TJ02 Document identification code: A
A crosstalk attack detection and location method based on distributed PCE in multi-domain optical networks
Authors: Wu Qiwu , Li Fang , Jiang Lingzhi , Liu Xueyue , Zhang Long 
Published: June 2020

Abstract
Aiming at the uncertainty problem of crosstalk attack detection and attack source localization in multi-domain optical networks, a new crosstalk attack detection and location method in multi-domain optical networks is proposed by using distributed PCE architecture and monitoring point placement strategy based on grey theory. Meanwhile, an example is given. The experimental results show that the proposed method is effective.
Comparison of Detection Technology for Runway Incursion Prevention in Airport Hot Spot
Authors: Jiang Li , Yang Ping , Ma Xiaodan , Yang Hao , Li Tuo , Yang JianHong 
Published: June 2020

Abstract
The prevention of runway incursion in hot spot of airports has always been one of the research hot spots in the field of international civil aviation. The detection of aircraft and vehicles in hot spots of airports has important significance in preventing runway incursion. This paper briefly introduces and analyzes several major technical systems used in the detection of active targets in hot spots of airports, and points out that microwave phased-array radar can provide parameters such as the distance, angle, speed, and direction of detection of targets. Compared with the traditional detection technology system, microwave phased-array radar has the advantages of high detection accuracy, low comprehensive cost, and easier acceptance.
Fault identification in T-connection transmission lines based on general regression neural network and traveling wave power angle
Authors: Fan Songhai , Gong Yiyu , Yang Jie , Liu Yiqin , Wu Tianbao , Ma Xiaomin , Luo Lei 
Published: June 2020

Abstract
In order to improve the accuracy of internal and external fault identification of T-connected transmission lines, a new method for identifying internal and external faults of T-connected transmission lines based on general regression neural network and traveling wave power angle was studied. The initial voltage and current traveling wave measured by each traveling wave protection unit of T-connected transmission line are transformed by S-transform, and the single frequency power angle after fault is calculated to form the sample set of fault eigenvector of T-connected transmission line. The established general regression neural network intelligent fault recognition model is used to train and test the sample data to identify internal and external faults. The simulation results show that the algorithm can accurately identify the internal and external faults of the T-connected transmission line under various operating conditions.
Research on Function Block Programmable Technology of Machine Vision
Authors: Zhong Chongquan , Dong Xianglong , Sun Hongtao , Xing Zhipeng 
Published: June 2020

Abstract
Aiming at the problems of low efficiency, difficult debugging and poor reusability of program in developing vision program by using text editing, a graphical program development technology is developed for vision program development. In this paper, the image processing algorithms and functions in the OpenCV vision library are studied and encapsulated according to the IEC61131-3 Function block specification. The interface model and program model of vision Function block are established. According to these two models, the vision Function block interface and the vision Function block program are described by using XML language, and the programming specification and instruction set of the vision Function block are established. The editing and compiling algorithm of the Function block program is researched to realize the configuration development environment and operate environment of the vision Function block program by using C plus plus language. Finally, the function of the software is tested and verified.
HDCDS-CDG: A Hierarchically Diffused Connected Dominating Sets based Compressed Data Gathering Scheme
Authors: Yu Xiaohan , Xu Wenlei , Chen Chao 
Published: June 2020

Abstract
How to reduce the energy consumption and prolong the network lifetime is one of the most important issues in Wireless Sensor Networks (WSNs). This paper proposed a Compressed Data Gathering (CDG) scheme based on Hierarchically Diffused Connected Dominating Sets (HDCDS). In the proposed scheme, a connected dominating set was constructed as the backbone of the network. All of the other nodes, i.e., non-backbone nodes, are connected to the backbone. Nodes in the backbone collect data from non-backbone nodes using the traditional data collection scheme. Data within the backbone are transmitted to the base station in CDG manner. Theoretical analysis and simulations showed that, when compared to the LEACH methods and traditional compressive sensing-based data collection methods, HDCDS-CDG not only reduces the consumption of network resources but also increases the lifetime of the network.
A New MAC Protocol for Intra-flight Data Link Based on Directional Antenna
Authors: Duan Rong , Li Yuan , Lv Na , Zhang Chong , Luo Zhou 
Published: June 2020

Abstract
Based on directional antenna, the capability of the intra-flight data link such as anti-jamming and low interception can be greatly improved. However, it also brings some problems: obtaining the destination node location information, meeting the real-time requirement of the burst traffic and sharing situation information with directional antenna, etc. To solve the problems, DP-CLMA (Dynamic Priority-Chain Link Multiple Access) protocol based on directional antenna is proposed, and some corresponding mechanisms are described in detail. By analyzing time delay performance of DP-CLMA protocol, the results show that DP-CLMA protocol adapts to intra-flight tactical data transmission.