The development of China's high-speed railway has made remarkable achievements. In this paper, a highspeed railway timetabling model based on transfer optimization is established. First, the current situation of China's high-speed railway development is introduced. To express the model in detail, the event-activity network (EAN) is used. To optimize the transfer, the current situation of passenger transfer in hub stations is studied is detail. The concept ‘transferable train pair’ is defined and used for modelling, and the ideal connecting time of transfer is calculated. With several assumptions, the constraints and objective function of the model are proposed. This model could guarantee passenger transfer, decrease passenger's transfer waiting time and thereby improve passenger's satisfaction.
{"title":"High-speed Railway Timetabling Model based on Transfer Optimization","authors":"Zhi Li, Qi Zhang, Yumou Ren, Yanhao Sun, Changjun Miao, Jiaying Duan","doi":"10.1109/ICAIIS49377.2020.9194932","DOIUrl":"https://doi.org/10.1109/ICAIIS49377.2020.9194932","url":null,"abstract":"The development of China's high-speed railway has made remarkable achievements. In this paper, a highspeed railway timetabling model based on transfer optimization is established. First, the current situation of China's high-speed railway development is introduced. To express the model in detail, the event-activity network (EAN) is used. To optimize the transfer, the current situation of passenger transfer in hub stations is studied is detail. The concept ‘transferable train pair’ is defined and used for modelling, and the ideal connecting time of transfer is calculated. With several assumptions, the constraints and objective function of the model are proposed. This model could guarantee passenger transfer, decrease passenger's transfer waiting time and thereby improve passenger's satisfaction.","PeriodicalId":416002,"journal":{"name":"2020 IEEE International Conference on Artificial Intelligence and Information Systems (ICAIIS)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114162849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-03-01DOI: 10.1109/ICAIIS49377.2020.9194950
Wang Kuan, Qi Xiaopeng, Li Panwen
Aiming at the problem that the electromagnetic environment of the aeroengine inlet test space is complex, the temperature range is large, and the test accuracy is seriously affected, a high-precision synchronous data acquisition system with temperature compensation is designed. The advantage of this system is: a gain error calibration model with temperature compensation is established, which effectively reduces temperature drift and quantization errors; An oversampling-decimation filtering algorithm is designed to well filter the noise interference in the system; A PID algorithm based on the clock phase-separated measurement time difference is proposed to realize the clock synchronization between the local pulse per second (1pps) and the external 1pps, which meets the needs of data fusion analysis between different test systems. Finally, the histogram analysis method is used to analyze and compare the collected data in different working modes. The results show that the method can effectively reduce the measurement error of the system and improve the system test accuracy; And the synchronization characteristics of the system were tested, the results show that the synchronization accuracy of the system is better than 150ns, which meets the requirements of data fusion analysis between different systems.
{"title":"Design of High Precision Synchronous Data Acquisition System with Temperature Compensation","authors":"Wang Kuan, Qi Xiaopeng, Li Panwen","doi":"10.1109/ICAIIS49377.2020.9194950","DOIUrl":"https://doi.org/10.1109/ICAIIS49377.2020.9194950","url":null,"abstract":"Aiming at the problem that the electromagnetic environment of the aeroengine inlet test space is complex, the temperature range is large, and the test accuracy is seriously affected, a high-precision synchronous data acquisition system with temperature compensation is designed. The advantage of this system is: a gain error calibration model with temperature compensation is established, which effectively reduces temperature drift and quantization errors; An oversampling-decimation filtering algorithm is designed to well filter the noise interference in the system; A PID algorithm based on the clock phase-separated measurement time difference is proposed to realize the clock synchronization between the local pulse per second (1pps) and the external 1pps, which meets the needs of data fusion analysis between different test systems. Finally, the histogram analysis method is used to analyze and compare the collected data in different working modes. The results show that the method can effectively reduce the measurement error of the system and improve the system test accuracy; And the synchronization characteristics of the system were tested, the results show that the synchronization accuracy of the system is better than 150ns, which meets the requirements of data fusion analysis between different systems.","PeriodicalId":416002,"journal":{"name":"2020 IEEE International Conference on Artificial Intelligence and Information Systems (ICAIIS)","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116603370","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-03-01DOI: 10.1109/ICAIIS49377.2020.9194924
Chai Xi, Chen Moliang, Jia Guoli, Yao Bin
The monitoring and management of tool life plays a key role in achieving maximum tool utilization and reducing tool usage costs. This paper proposes a process management and monitoring scheme, which covers the whole lifecycle of tools and has dynamic adjustment and tracking. Based on the C# programming language and MySQL database, a workshop-level tool management system is developed. The system realizes the inventory management of the workshop tools and also the visual tracking of the tool life information from the storage to the scrapping process. The life monitoring process includes manual adjustment by filling in the receipt and automatic adjustment of system integration monitoring.
{"title":"Tool Management System with Dynamic Life Adjustment","authors":"Chai Xi, Chen Moliang, Jia Guoli, Yao Bin","doi":"10.1109/ICAIIS49377.2020.9194924","DOIUrl":"https://doi.org/10.1109/ICAIIS49377.2020.9194924","url":null,"abstract":"The monitoring and management of tool life plays a key role in achieving maximum tool utilization and reducing tool usage costs. This paper proposes a process management and monitoring scheme, which covers the whole lifecycle of tools and has dynamic adjustment and tracking. Based on the C# programming language and MySQL database, a workshop-level tool management system is developed. The system realizes the inventory management of the workshop tools and also the visual tracking of the tool life information from the storage to the scrapping process. The life monitoring process includes manual adjustment by filling in the receipt and automatic adjustment of system integration monitoring.","PeriodicalId":416002,"journal":{"name":"2020 IEEE International Conference on Artificial Intelligence and Information Systems (ICAIIS)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115398365","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-03-01DOI: 10.1109/ICAIIS49377.2020.9194917
Qian Xu, Haibo Gong, Zhao Hao
Based on the wide application of high-speed avionics bus in airborne avionics system, the real-time telemetry technology of high-speed avionics bus data is studied in this paper. Faced with the brand new bus architecture and high-speed mass data, traditional measurement technology cannot meet the new requirements. Hence, in this paper, the monitoring and remote-measuring transmission system of high-speed avionics bus data is designed to realize the integration of high-speed bus data to network data acquisition technology and digital remote-measuring technology. Experimental results show that the scheme can effectively realize the acquisition and real-time remote-measuring transmission of airborne avionics bus data.
{"title":"Research on Real-time Telemetry Technology of High-speed Avionics Bus Data","authors":"Qian Xu, Haibo Gong, Zhao Hao","doi":"10.1109/ICAIIS49377.2020.9194917","DOIUrl":"https://doi.org/10.1109/ICAIIS49377.2020.9194917","url":null,"abstract":"Based on the wide application of high-speed avionics bus in airborne avionics system, the real-time telemetry technology of high-speed avionics bus data is studied in this paper. Faced with the brand new bus architecture and high-speed mass data, traditional measurement technology cannot meet the new requirements. Hence, in this paper, the monitoring and remote-measuring transmission system of high-speed avionics bus data is designed to realize the integration of high-speed bus data to network data acquisition technology and digital remote-measuring technology. Experimental results show that the scheme can effectively realize the acquisition and real-time remote-measuring transmission of airborne avionics bus data.","PeriodicalId":416002,"journal":{"name":"2020 IEEE International Conference on Artificial Intelligence and Information Systems (ICAIIS)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115503429","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-03-01DOI: 10.1109/ICAIIS49377.2020.9194794
Yuling Zhang, Rui Feng, Wenwei He
This paper propose a concatenated coding scheme based on polar codes and LDPC codes on AWGN channel. A polar code is served as an outer code and a LDPC code is employed as an inner code. First it proposes the system framework, and introduces the principle of polar codes and LDPC codes respectively, then demonstrates the decoding scheme of the concatenated codes. Finally, it gives the simulation results and some conclusions.
{"title":"Performance of Polar-LDPC Concatenated Coding on AWNG Channel","authors":"Yuling Zhang, Rui Feng, Wenwei He","doi":"10.1109/ICAIIS49377.2020.9194794","DOIUrl":"https://doi.org/10.1109/ICAIIS49377.2020.9194794","url":null,"abstract":"This paper propose a concatenated coding scheme based on polar codes and LDPC codes on AWGN channel. A polar code is served as an outer code and a LDPC code is employed as an inner code. First it proposes the system framework, and introduces the principle of polar codes and LDPC codes respectively, then demonstrates the decoding scheme of the concatenated codes. Finally, it gives the simulation results and some conclusions.","PeriodicalId":416002,"journal":{"name":"2020 IEEE International Conference on Artificial Intelligence and Information Systems (ICAIIS)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115615186","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-03-01DOI: 10.1109/ICAIIS49377.2020.9194828
Qianyi Shang, Lijun Chen, Ruoxiong Tong
A co-design architecture for the field programmable gate array (FPGA)-based evolvable hardware (EHW) system is proposed. In this architecture, a virtual reconfigurable circuit (VRC) is configured by the genetic algorithm (GA). The VRC is implemented in FPGA, and the GA is executed by a processor. The ARM processor and the NIOS II processor are used. This architecture maintains the flexibility and scalability of the VRC. This approach also has the flexibility to change the parameters or even the GA algorithm without affecting the FPGA part. Three circuits of different degrees of complexity are used to evaluate the system. Experimental results showed that the co-design was successfully implemented. In addition, compared to the NIOS II approach, the ARM approach had the advantages regarding the evolution speed and the logic utilization.
{"title":"Hardware/Software Co-design for Evolvable Hardware by Genetic Algorithm","authors":"Qianyi Shang, Lijun Chen, Ruoxiong Tong","doi":"10.1109/ICAIIS49377.2020.9194828","DOIUrl":"https://doi.org/10.1109/ICAIIS49377.2020.9194828","url":null,"abstract":"A co-design architecture for the field programmable gate array (FPGA)-based evolvable hardware (EHW) system is proposed. In this architecture, a virtual reconfigurable circuit (VRC) is configured by the genetic algorithm (GA). The VRC is implemented in FPGA, and the GA is executed by a processor. The ARM processor and the NIOS II processor are used. This architecture maintains the flexibility and scalability of the VRC. This approach also has the flexibility to change the parameters or even the GA algorithm without affecting the FPGA part. Three circuits of different degrees of complexity are used to evaluate the system. Experimental results showed that the co-design was successfully implemented. In addition, compared to the NIOS II approach, the ARM approach had the advantages regarding the evolution speed and the logic utilization.","PeriodicalId":416002,"journal":{"name":"2020 IEEE International Conference on Artificial Intelligence and Information Systems (ICAIIS)","volume":"87 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122597523","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-03-01DOI: 10.1109/ICAIIS49377.2020.9194913
Kuo-Chi Chang, Yu-Wen Zhou, Akram Muhammad Shoaib, Kai-Chun Chu, M. Izhar, Shafi Ullah, Yuh-Chung Lin
this study is a kind of low-cost small intelligent robots, which mainly completes tasks automatically according to the set intelligent mode, and does not require any human assistance. It must integrate the wall tracking and flood filling algorithm programming software, and then install and execute the aforementioned programming in the hardware system of the small intelligent robot of the Arduino hardware based. However, technology of this study also needed for high performance and see the hardware chosen to complete this project is Arduino based two-wheel mobile small intelligent robot. A 6.0 × 6.0 physical maze is constructed to confirm and verify the small intelligent robot performance, and simulate the Arduino algorithm program of this study. We draw it using the final optimized path of a total of 30 optimized movement trainings for results. From the path, we can see that the small intelligent robot can obtain The shortest optimized pa th, but because of the limitations of the selected sensors and motor drivers, the path cannot be completed as a straight line, but under the requirements of low cost, it has already met the expected effects of this study.
{"title":"Shortest Distance Maze Solving Robot","authors":"Kuo-Chi Chang, Yu-Wen Zhou, Akram Muhammad Shoaib, Kai-Chun Chu, M. Izhar, Shafi Ullah, Yuh-Chung Lin","doi":"10.1109/ICAIIS49377.2020.9194913","DOIUrl":"https://doi.org/10.1109/ICAIIS49377.2020.9194913","url":null,"abstract":"this study is a kind of low-cost small intelligent robots, which mainly completes tasks automatically according to the set intelligent mode, and does not require any human assistance. It must integrate the wall tracking and flood filling algorithm programming software, and then install and execute the aforementioned programming in the hardware system of the small intelligent robot of the Arduino hardware based. However, technology of this study also needed for high performance and see the hardware chosen to complete this project is Arduino based two-wheel mobile small intelligent robot. A 6.0 × 6.0 physical maze is constructed to confirm and verify the small intelligent robot performance, and simulate the Arduino algorithm program of this study. We draw it using the final optimized path of a total of 30 optimized movement trainings for results. From the path, we can see that the small intelligent robot can obtain The shortest optimized pa th, but because of the limitations of the selected sensors and motor drivers, the path cannot be completed as a straight line, but under the requirements of low cost, it has already met the expected effects of this study.","PeriodicalId":416002,"journal":{"name":"2020 IEEE International Conference on Artificial Intelligence and Information Systems (ICAIIS)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128536970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Power data resources have complex problems such as heterogeneous, multi-source dispersion, high dimensionality, and diverse forms. This paper proposes one heterogeneous data feature extraction framework based on long-short term memory graph convolutional neural network, which realizes feature extraction and fusion of distributed heterogeneous data with numerical, image and text information's mixture. Experiments show that this method is more suitable for feature extraction of heterogeneous data in grid business than other graph convolutional networks or long-short term memory neural networks. It provides further monitoring and early warning, state analysis and professional management for the power data business technical support.
{"title":"Heterogeneous Data Feature Extraction Technology based on Long-Short Term Memory","authors":"Jiye Wang, Yundan Liang, Lingchao Gao, Zhixian Pi, Xiao Yang, Huaixun Zhang, Jiasong Sun","doi":"10.1109/ICAIIS49377.2020.9194865","DOIUrl":"https://doi.org/10.1109/ICAIIS49377.2020.9194865","url":null,"abstract":"Power data resources have complex problems such as heterogeneous, multi-source dispersion, high dimensionality, and diverse forms. This paper proposes one heterogeneous data feature extraction framework based on long-short term memory graph convolutional neural network, which realizes feature extraction and fusion of distributed heterogeneous data with numerical, image and text information's mixture. Experiments show that this method is more suitable for feature extraction of heterogeneous data in grid business than other graph convolutional networks or long-short term memory neural networks. It provides further monitoring and early warning, state analysis and professional management for the power data business technical support.","PeriodicalId":416002,"journal":{"name":"2020 IEEE International Conference on Artificial Intelligence and Information Systems (ICAIIS)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122478913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-03-01DOI: 10.1109/ICAIIS49377.2020.9194855
Ni Li, Menglin Li, Wei Shen, P. Chen
The purpose of the introduction of IMS Technology into the power exchange network is to meet the development of information operations, so that the exchange platform can carry more functions of services and services. The grid also deployed the integration of unified communication, mobile office, video conference and other multimedia services while introducing IMS Technology, which added great pressure to the IMS service provision process. On this demand, this paper proposes an IMS service distribution and control technology based on the edge computing arrangement ability. It can marginalize the business functions and service processes, reduce the repeated interaction between SBC and the core network. It can lightweight IMS service registration, startup, conversation, deletion and other service protocols, and improve the quality of IMS service with the help of the edge computing service information proxy function And efficiency.
{"title":"Research on the implementation of IMS boundary session control capability based on edge computing","authors":"Ni Li, Menglin Li, Wei Shen, P. Chen","doi":"10.1109/ICAIIS49377.2020.9194855","DOIUrl":"https://doi.org/10.1109/ICAIIS49377.2020.9194855","url":null,"abstract":"The purpose of the introduction of IMS Technology into the power exchange network is to meet the development of information operations, so that the exchange platform can carry more functions of services and services. The grid also deployed the integration of unified communication, mobile office, video conference and other multimedia services while introducing IMS Technology, which added great pressure to the IMS service provision process. On this demand, this paper proposes an IMS service distribution and control technology based on the edge computing arrangement ability. It can marginalize the business functions and service processes, reduce the repeated interaction between SBC and the core network. It can lightweight IMS service registration, startup, conversation, deletion and other service protocols, and improve the quality of IMS service with the help of the edge computing service information proxy function And efficiency.","PeriodicalId":416002,"journal":{"name":"2020 IEEE International Conference on Artificial Intelligence and Information Systems (ICAIIS)","volume":"241 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116573947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-03-01DOI: 10.1109/ICAIIS49377.2020.9194947
Zhenjun Zhang, Yufeng Chen, Ying Lin
It is very important to understand the mechanism of surface flashover characteristics of the insulator materials in vacuum in order to avoid the surface discharge of sensitive components. There are two models with dominant roles and highly reorganization in academic circle. One is secondary electron emission avalanche model (SEEA) and the other is electron triggered polarity relaxation model (EPTR). However these models are still not understood clearly and there is no model which can completely explain all the phenomenon of surface flashover in vacuum, especially the reverse surface flashover phenomenon. In this paper, DC surface flashover experiments of insulator are studied in vacuum to reveal the reverse surface flashover mechanism. Results showed that there is a phenomenon in which a reverse flashover current sometimes occurs in the surface flashover process. The reverse flashover current pulse may occur in both the initial pre-flashover phase and the flashover breakdown phase, that is, when the flashover current pulse is positive, the surface flashover voltage is negative. The experiments results can be explained as follows. The electrons injection phenomenon near the cathode and holes injection phenomenon simultaneously near the anode are formed in the high electric field intensity at the triple junction (cathode end, vacuum and dielectric surface, CTJ). The electron-hole pairs migrate to the anode and cathode in the applied electric field intensity, respectively. Some of the carriers in the migration are captured by the trap center, forming the positive and negative charge trapping center. The region between the trap center and the electrodes will form an additive electric field. The negative charge trapping center weaken the local region electric field between cathode and negative charge, forming a reverse electric field to limit further injection of charge. At the same time, the trapping center enhanced the additive electric field between the anode and the trapping center. The region of the space charge electric field formed by the center of the negative charge is completely opposite to the applied electric field. When the negative charge trapping center value is sufficiently deep, the reverse additive electric field intensity will reach a critical of flashover breakdown value in the region. The partial discharge usually cannot occur due to the weakening of the high external electric field intensity. However, the applied electric field intensity of the insulator is instantaneously reduced during the surface flashover breakdown. At the same time, the electrons in the trapping center are not detrapping, so the electric field intensity of the reverse in the cathode and trapping center will rise rapidly. As a consequence of the electric field intensity reaching the critical breakdown value, a reverse partial discharge is formed immediately. Unlike the usual case, the electrons will escape from trapping center and transfer towards cathode und
{"title":"Study on the Mechanism of Reverse Surface Flashover of Insulators","authors":"Zhenjun Zhang, Yufeng Chen, Ying Lin","doi":"10.1109/ICAIIS49377.2020.9194947","DOIUrl":"https://doi.org/10.1109/ICAIIS49377.2020.9194947","url":null,"abstract":"It is very important to understand the mechanism of surface flashover characteristics of the insulator materials in vacuum in order to avoid the surface discharge of sensitive components. There are two models with dominant roles and highly reorganization in academic circle. One is secondary electron emission avalanche model (SEEA) and the other is electron triggered polarity relaxation model (EPTR). However these models are still not understood clearly and there is no model which can completely explain all the phenomenon of surface flashover in vacuum, especially the reverse surface flashover phenomenon. In this paper, DC surface flashover experiments of insulator are studied in vacuum to reveal the reverse surface flashover mechanism. Results showed that there is a phenomenon in which a reverse flashover current sometimes occurs in the surface flashover process. The reverse flashover current pulse may occur in both the initial pre-flashover phase and the flashover breakdown phase, that is, when the flashover current pulse is positive, the surface flashover voltage is negative. The experiments results can be explained as follows. The electrons injection phenomenon near the cathode and holes injection phenomenon simultaneously near the anode are formed in the high electric field intensity at the triple junction (cathode end, vacuum and dielectric surface, CTJ). The electron-hole pairs migrate to the anode and cathode in the applied electric field intensity, respectively. Some of the carriers in the migration are captured by the trap center, forming the positive and negative charge trapping center. The region between the trap center and the electrodes will form an additive electric field. The negative charge trapping center weaken the local region electric field between cathode and negative charge, forming a reverse electric field to limit further injection of charge. At the same time, the trapping center enhanced the additive electric field between the anode and the trapping center. The region of the space charge electric field formed by the center of the negative charge is completely opposite to the applied electric field. When the negative charge trapping center value is sufficiently deep, the reverse additive electric field intensity will reach a critical of flashover breakdown value in the region. The partial discharge usually cannot occur due to the weakening of the high external electric field intensity. However, the applied electric field intensity of the insulator is instantaneously reduced during the surface flashover breakdown. At the same time, the electrons in the trapping center are not detrapping, so the electric field intensity of the reverse in the cathode and trapping center will rise rapidly. As a consequence of the electric field intensity reaching the critical breakdown value, a reverse partial discharge is formed immediately. Unlike the usual case, the electrons will escape from trapping center and transfer towards cathode und","PeriodicalId":416002,"journal":{"name":"2020 IEEE International Conference on Artificial Intelligence and Information Systems (ICAIIS)","volume":"113 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124154007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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