In the CBTC system, movement authority is the lifeline. Calculation error of movement authority can lead to vehicle destruction and cause enormous loss of life and property. Therefore, it is necessary to ensure correctness of movement authority for train use. This paper provides a solution to ensure the correctness of train movement authority. After calculating the movement authority for the train, the system uses a heterogeneous algorithm to re-check the obstacle information within the movement authority. Only when no obstacle information is found within the movement authority can the movement authority information be exported to the train. Otherwise, the system remains in safe status. This solution can effectively prevent the occurrence of major accidents.
{"title":"A Solution to Ensure Correctness of Movement Authority","authors":"Shusong Yang, Xiangyang Wang, Junyang Fang, Wen Fu, Zhengwen Huang","doi":"10.1109/ICITE50838.2020.9231409","DOIUrl":"https://doi.org/10.1109/ICITE50838.2020.9231409","url":null,"abstract":"In the CBTC system, movement authority is the lifeline. Calculation error of movement authority can lead to vehicle destruction and cause enormous loss of life and property. Therefore, it is necessary to ensure correctness of movement authority for train use. This paper provides a solution to ensure the correctness of train movement authority. After calculating the movement authority for the train, the system uses a heterogeneous algorithm to re-check the obstacle information within the movement authority. Only when no obstacle information is found within the movement authority can the movement authority information be exported to the train. Otherwise, the system remains in safe status. This solution can effectively prevent the occurrence of major accidents.","PeriodicalId":112371,"journal":{"name":"2020 IEEE 5th International Conference on Intelligent Transportation Engineering (ICITE)","volume":"308 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124249278","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}
Based on the FCWS operating principle, GB / T 33577–2017 and other regulations at home and abroad, this paper puts forward the FCWS test scheme applicable to the particular road conditions in China and studies the warning modes that affect the warning effect of FCWS. Finally the paper completes the real vehicle test of the FCWS performance of commercial vehicle. The final result shows that the FCWS complies with the performance requirements in GB / T 33577-2017. Warning TTC of FCWS is about 3s and FCWS can effectively reduce driving behaviours such as sharp turns and sharp brakes. On the other hand, audio has a better warning effect than visual. This paper not only improves the FCWS test method and evaluation system but also provides a reference for FCWS standard formulation and system development in China.
本文根据FCWS工作原理、GB / T 33577-2017等国内外法规，提出了适用于中国特定路况的FCWS试验方案，并对影响FCWS预警效果的预警模式进行了研究。最后完成了商用车FCWS性能的实车试验。最终测试结果表明，FCWS符合GB / T 33577-2017的性能要求。FCWS的预警TTC约为3s，能够有效减少急转弯、急刹车等驾驶行为。另一方面，音频比视觉具有更好的预警效果。本文不仅完善了FCWS的试验方法和评价体系，而且为国内FCWS标准的制定和体系的发展提供了参考。
{"title":"Research on Test Method of Commercial Vehicle Forward Collision Warning Systems","authors":"Botong Wang, Shan Zhang, Wenbo Ma, K. Qin, Kuiyuan Guo, Jinxian Gao, Yinghao Ding","doi":"10.1109/ICITE50838.2020.9231324","DOIUrl":"https://doi.org/10.1109/ICITE50838.2020.9231324","url":null,"abstract":"Based on the FCWS operating principle, GB / T 33577–2017 and other regulations at home and abroad, this paper puts forward the FCWS test scheme applicable to the particular road conditions in China and studies the warning modes that affect the warning effect of FCWS. Finally the paper completes the real vehicle test of the FCWS performance of commercial vehicle. The final result shows that the FCWS complies with the performance requirements in GB / T 33577-2017. Warning TTC of FCWS is about 3s and FCWS can effectively reduce driving behaviours such as sharp turns and sharp brakes. On the other hand, audio has a better warning effect than visual. This paper not only improves the FCWS test method and evaluation system but also provides a reference for FCWS standard formulation and system development in China.","PeriodicalId":112371,"journal":{"name":"2020 IEEE 5th International Conference on Intelligent Transportation Engineering (ICITE)","volume":"329 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114015145","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 : 2020-09-01DOI: 10.1109/ICITE50838.2020.9231355
Jiayu Shen, Qingxiao Liu, Huiyan Chen
An accurate and efficient environment perception system is crucial for intelligent vehicles. This study proposes an optimized 2D object detection method utilizing multi-sensor fusion to improve the performance of the environment perception system. In the sensor fusion module, a depth completion network is used to predict dense depth map, so both dense and sparse RGB-D images can be obtained. Then, an efficient object detection baseline is optimized for intelligent vehicles. This method is verified by KITTI 2D object detection dataset. The experimental results show that the proposed method can be more accurate than many latest methods on KITTI leaderboard. Meanwhile, this method consumes less inference time and shows its high efficiency.
{"title":"An Optimized Multi-sensor Fused Object Detection Method for Intelligent Vehicles","authors":"Jiayu Shen, Qingxiao Liu, Huiyan Chen","doi":"10.1109/ICITE50838.2020.9231355","DOIUrl":"https://doi.org/10.1109/ICITE50838.2020.9231355","url":null,"abstract":"An accurate and efficient environment perception system is crucial for intelligent vehicles. This study proposes an optimized 2D object detection method utilizing multi-sensor fusion to improve the performance of the environment perception system. In the sensor fusion module, a depth completion network is used to predict dense depth map, so both dense and sparse RGB-D images can be obtained. Then, an efficient object detection baseline is optimized for intelligent vehicles. This method is verified by KITTI 2D object detection dataset. The experimental results show that the proposed method can be more accurate than many latest methods on KITTI leaderboard. Meanwhile, this method consumes less inference time and shows its high efficiency.","PeriodicalId":112371,"journal":{"name":"2020 IEEE 5th International Conference on Intelligent Transportation Engineering (ICITE)","volume":"258 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114261700","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 : 2020-09-01DOI: 10.1109/ICITE50838.2020.9231322
Wenqiao Sun, Qigang Liu, Xiang Li, Min Chen, Yan Zhang
Freight railway plays a more and more important role in China freight logistics industry. The traffic volume is increasing at an annual growth rate of more than 6%, which enhances the importance of increasing carrying capacity of marshalling yards. By using intelligent technologies like satellite positioning, image recognition, and Iot (Internet of Things), methods of accurate marshalling-yards operation data obtaining, transmission and processing are illustrated in the paper. Cargo wagon loading situation inspection is taken as a case study, and explains how to establish an accurate real-time data base for lean operations management, provides an optimized operation process, and displays a control query interface, which increases both safety and efficiency of the operation process.
{"title":"Research on Lean Operations Management Method of Railway Marshalling Yard","authors":"Wenqiao Sun, Qigang Liu, Xiang Li, Min Chen, Yan Zhang","doi":"10.1109/ICITE50838.2020.9231322","DOIUrl":"https://doi.org/10.1109/ICITE50838.2020.9231322","url":null,"abstract":"Freight railway plays a more and more important role in China freight logistics industry. The traffic volume is increasing at an annual growth rate of more than 6%, which enhances the importance of increasing carrying capacity of marshalling yards. By using intelligent technologies like satellite positioning, image recognition, and Iot (Internet of Things), methods of accurate marshalling-yards operation data obtaining, transmission and processing are illustrated in the paper. Cargo wagon loading situation inspection is taken as a case study, and explains how to establish an accurate real-time data base for lean operations management, provides an optimized operation process, and displays a control query interface, which increases both safety and efficiency of the operation process.","PeriodicalId":112371,"journal":{"name":"2020 IEEE 5th International Conference on Intelligent Transportation Engineering (ICITE)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131681082","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}
With the development of intelligent transportation system, the vehicle on the road by a single human gradually evolved into a vehicle flow with automatic driving vehicle and the acceleration automatic vehicle traffic, the mixed with different types of vehicle are bound to impact on traffic characteristics of vehicles, traffic characteristic of intersection is the intersection design and optimization of the premise and foundation. Therefore, this paper uses SUMO to simulate MV, AV and CAV mixed in pairs at different proportions to study the common characteristics of mixed vehicles at urban intersections. Firstly, different following models are defined for different vehicles to describe their different following behavior. Then, by setting the mixing rate of mixed vehicles to gradually increase, the traffic data of mixed vehicles at intersections under different proportions was obtained through simulation. Finally, through data analysis and calculation, the six indicators and the spatial and temporal trajectory map that can represent the traffic characteristics of mixed vehicles at intersections are obtained. From the analysis and comparison of the changing trend of the six indicators with the change of vehicle proportion and the spatial and temporal trajectory map, the optimal proportion of mixed vehicles with traffic capacity can be obtained. The research results can provide theoretical support for intelligent intersection design and optimization.
{"title":"Research on Traffic Characteristics of Signal Intersections with Mixed Traffic Flow","authors":"X. Cui, Xiansheng Li, Xue-lian Zheng, X. Zhang, Lan Zhao, Jing-hai Zhang","doi":"10.1109/ICITE50838.2020.9231426","DOIUrl":"https://doi.org/10.1109/ICITE50838.2020.9231426","url":null,"abstract":"With the development of intelligent transportation system, the vehicle on the road by a single human gradually evolved into a vehicle flow with automatic driving vehicle and the acceleration automatic vehicle traffic, the mixed with different types of vehicle are bound to impact on traffic characteristics of vehicles, traffic characteristic of intersection is the intersection design and optimization of the premise and foundation. Therefore, this paper uses SUMO to simulate MV, AV and CAV mixed in pairs at different proportions to study the common characteristics of mixed vehicles at urban intersections. Firstly, different following models are defined for different vehicles to describe their different following behavior. Then, by setting the mixing rate of mixed vehicles to gradually increase, the traffic data of mixed vehicles at intersections under different proportions was obtained through simulation. Finally, through data analysis and calculation, the six indicators and the spatial and temporal trajectory map that can represent the traffic characteristics of mixed vehicles at intersections are obtained. From the analysis and comparison of the changing trend of the six indicators with the change of vehicle proportion and the spatial and temporal trajectory map, the optimal proportion of mixed vehicles with traffic capacity can be obtained. The research results can provide theoretical support for intelligent intersection design and optimization.","PeriodicalId":112371,"journal":{"name":"2020 IEEE 5th International Conference on Intelligent Transportation Engineering (ICITE)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131788616","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}
Autonomous mine transportation technology is an inevitable trend in intelligent development of future industrial Internet. However, existing solutions in the industry usually pay more attention to implementation and optimization of functions and performance, neglecting the ever increasing importance of safety requirements for the mining automation system. This article investigates the current situation and relevant safety standards of the industry and proposes safety system design principles, models, and safety application measures applicable to the autonomous mine transportation technology in an aim to enhancing standardization, normalization, and enterprise management proficiency of mining production.
{"title":"The Safety Design Suggestions of Autonomous Mine Transportation System","authors":"Binjian Wu, Jianmin Bai, Zhujun Ling, Zaifu Zhou, Feijie Wang, Shunding Hu, Aijun Liu","doi":"10.1109/ICITE50838.2020.9231329","DOIUrl":"https://doi.org/10.1109/ICITE50838.2020.9231329","url":null,"abstract":"Autonomous mine transportation technology is an inevitable trend in intelligent development of future industrial Internet. However, existing solutions in the industry usually pay more attention to implementation and optimization of functions and performance, neglecting the ever increasing importance of safety requirements for the mining automation system. This article investigates the current situation and relevant safety standards of the industry and proposes safety system design principles, models, and safety application measures applicable to the autonomous mine transportation technology in an aim to enhancing standardization, normalization, and enterprise management proficiency of mining production.","PeriodicalId":112371,"journal":{"name":"2020 IEEE 5th International Conference on Intelligent Transportation Engineering (ICITE)","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132971737","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 : 2020-09-01DOI: 10.1109/ICITE50838.2020.9231488
Guolin Zhang, Jing Lin, Ying Zhang, Kechong Xue, J. Nan, Bo Li
This paper introduces an intelligent operation and maintenance platform of urban rail transit based on big data, and its application in real projects. Automatic anomaly detection is realized through big data platform of intelligent operation and maintenance. Factors that may cause abnormalities through intelligent analysis are automatically found out. By providing multi-dimensional statistics, users can understand the failure rules of the control system from different aspects.
{"title":"Big Data Based Intelligent Operation and Maintenance Platform","authors":"Guolin Zhang, Jing Lin, Ying Zhang, Kechong Xue, J. Nan, Bo Li","doi":"10.1109/ICITE50838.2020.9231488","DOIUrl":"https://doi.org/10.1109/ICITE50838.2020.9231488","url":null,"abstract":"This paper introduces an intelligent operation and maintenance platform of urban rail transit based on big data, and its application in real projects. Automatic anomaly detection is realized through big data platform of intelligent operation and maintenance. Factors that may cause abnormalities through intelligent analysis are automatically found out. By providing multi-dimensional statistics, users can understand the failure rules of the control system from different aspects.","PeriodicalId":112371,"journal":{"name":"2020 IEEE 5th International Conference on Intelligent Transportation Engineering (ICITE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130476777","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 : 2020-09-01DOI: 10.1109/ICITE50838.2020.9231350
Xiaojian Zhang, Zhuopeng Shi, Jiwu Liu, K. Han, Wei-Qi Yan, Xiangyu Zhang, Qi Li
BIM has been widely used in construction, municipal engineering, electric power, transportation and other engineering fields, but the researches and applications in bridge inspection are still at an early stage in recent years.Aiming at the shortcomings of the traditional bridge inspection, giving full play to the advantages of BIM visualization, digitization, coordination, to explore the application of BIM technology in the bridge inspection process and combine with engineering practice experience, verifying the feasibility of BIM is applied in bridge inspection, making more information-based, systematic and intelligent testing of bridge, providing a new train of thought for bridge testing workers.
{"title":"Exploring the Application of BIM Technology in Bridge Inspection","authors":"Xiaojian Zhang, Zhuopeng Shi, Jiwu Liu, K. Han, Wei-Qi Yan, Xiangyu Zhang, Qi Li","doi":"10.1109/ICITE50838.2020.9231350","DOIUrl":"https://doi.org/10.1109/ICITE50838.2020.9231350","url":null,"abstract":"BIM has been widely used in construction, municipal engineering, electric power, transportation and other engineering fields, but the researches and applications in bridge inspection are still at an early stage in recent years.Aiming at the shortcomings of the traditional bridge inspection, giving full play to the advantages of BIM visualization, digitization, coordination, to explore the application of BIM technology in the bridge inspection process and combine with engineering practice experience, verifying the feasibility of BIM is applied in bridge inspection, making more information-based, systematic and intelligent testing of bridge, providing a new train of thought for bridge testing workers.","PeriodicalId":112371,"journal":{"name":"2020 IEEE 5th International Conference on Intelligent Transportation Engineering (ICITE)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114605088","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 : 2020-09-01DOI: 10.1109/ICITE50838.2020.9231445
Yazhuo Li, Xia Liu
This paper takes Wuhan metro type A and B vehicles for example, using a simulation method to study the passenger evacuation capability of different metro vehicles. Firstly, the dimensions and interior layout of the two types of carriages have been investigated and compared. Then, passenger evacuation simulation models of these two types of vehicles have been simulated by AnyLogic software. The relationship between the occupant load and the crowd evacuation timeframe was studied under different metro vehicle type. The validation results show that the simulation models are suitable for metro carriage evacuation researches. Through model simulation, it can be seen that, the crowd evacuation time is linear with the number of passengers with correlation coefficients R2 higher than 0.99. The interior space including the number of doors, the width of the carriage, the number of grab poles and the effective area of the carriage are all affect the evacuation efficiency of passengers. Under the condition of full occupancy, the evacuation efficiency of type A vehicle is 14% higher than that of type B.
{"title":"Study of Passenger Evacuation Capability in Metro Vehicle Using Simulation Methods","authors":"Yazhuo Li, Xia Liu","doi":"10.1109/ICITE50838.2020.9231445","DOIUrl":"https://doi.org/10.1109/ICITE50838.2020.9231445","url":null,"abstract":"This paper takes Wuhan metro type A and B vehicles for example, using a simulation method to study the passenger evacuation capability of different metro vehicles. Firstly, the dimensions and interior layout of the two types of carriages have been investigated and compared. Then, passenger evacuation simulation models of these two types of vehicles have been simulated by AnyLogic software. The relationship between the occupant load and the crowd evacuation timeframe was studied under different metro vehicle type. The validation results show that the simulation models are suitable for metro carriage evacuation researches. Through model simulation, it can be seen that, the crowd evacuation time is linear with the number of passengers with correlation coefficients R2 higher than 0.99. The interior space including the number of doors, the width of the carriage, the number of grab poles and the effective area of the carriage are all affect the evacuation efficiency of passengers. Under the condition of full occupancy, the evacuation efficiency of type A vehicle is 14% higher than that of type B.","PeriodicalId":112371,"journal":{"name":"2020 IEEE 5th International Conference on Intelligent Transportation Engineering (ICITE)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121188714","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 : 2020-09-01DOI: 10.1109/ICITE50838.2020.9231323
Chun Tian, Benfeng Zhang
This paper studies the time and position of the maximum coupler force of heavy haul train with electrically controlled pneumatic(ECP) system under the ramp change of braking condition, analyzes the causes of longitudinal impulse between vehicles, and studies the transmission law of longitudinal impulse of heavy haul train. The results show that the generation of maximum coupler force is related to ramp and longitudinal impulse transmission. When the initial speed of the train is small and the absolute value of deceleration is small, the main reason for the formation of the maximum coupler force is the influence of the ramp; when the train speed is high or the absolute value of deceleration is large, the main reason for the formation of the maximum coupler force is the longitudinal impulse transmission effect.
{"title":"Study on Longitudinal Impulse Law under Braking Condition for Heavy Haul Train with ECP Brake System","authors":"Chun Tian, Benfeng Zhang","doi":"10.1109/ICITE50838.2020.9231323","DOIUrl":"https://doi.org/10.1109/ICITE50838.2020.9231323","url":null,"abstract":"This paper studies the time and position of the maximum coupler force of heavy haul train with electrically controlled pneumatic(ECP) system under the ramp change of braking condition, analyzes the causes of longitudinal impulse between vehicles, and studies the transmission law of longitudinal impulse of heavy haul train. The results show that the generation of maximum coupler force is related to ramp and longitudinal impulse transmission. When the initial speed of the train is small and the absolute value of deceleration is small, the main reason for the formation of the maximum coupler force is the influence of the ramp; when the train speed is high or the absolute value of deceleration is large, the main reason for the formation of the maximum coupler force is the longitudinal impulse transmission effect.","PeriodicalId":112371,"journal":{"name":"2020 IEEE 5th International Conference on Intelligent Transportation Engineering (ICITE)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121925915","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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