Complex network theory and topology analysis have been gradually applied in land transportation network research. However, the research on oil and gas storage and transportation in the port area is still blank. Based on the analysis of the operation process of the oil and gas storage and transportation system in the port area, this paper establishes the topological network structure of the oil and gas storage and transportation system for the first time. Through the analysis and calculation of parameters such as node degree, shortest path, and betweenness of nodes in this network, the key node analysis of the oil and gas storage and transportation system is realized.
{"title":"Study on topological characteristics of oil and gas storage and transportation system in port area","authors":"Zhihui Zhou, Yeheng Wang, T. Bai","doi":"10.1117/12.2652750","DOIUrl":"https://doi.org/10.1117/12.2652750","url":null,"abstract":"Complex network theory and topology analysis have been gradually applied in land transportation network research. However, the research on oil and gas storage and transportation in the port area is still blank. Based on the analysis of the operation process of the oil and gas storage and transportation system in the port area, this paper establishes the topological network structure of the oil and gas storage and transportation system for the first time. Through the analysis and calculation of parameters such as node degree, shortest path, and betweenness of nodes in this network, the key node analysis of the oil and gas storage and transportation system is realized.","PeriodicalId":116712,"journal":{"name":"Frontiers of Traffic and Transportation Engineering","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134152855","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}
Driver fatigue is a major cause of road accidents and kills tens of thousands of people per year. Eye movement and visual features are considered to be affected by driver fatigue. In this paper, a 120min driving simulation test was designed, and the Stanford Sleepiness Scale (SSS) subjective fatigue values and eye characteristics of 16 drivers were collected. Subjective fatigue values were divided into three grades: awake, awake-fatigue and fatigue. From the perspective of visual characteristics, the differences in saccade, blink, and fixation between awake and fatigue states were analyzed. Finally, saccade, blink, fixation, and combination methods to discriminate driver fatigue were compared according to the classification accuracy. The results show that whether drivers are awake or fatigued, their fixation duration is longer than blink duration, and blink duration is longer than saccade duration. Under driver fatigue, saccade duration and fixation duration decreased significantly, while blink duration increased significantly. The classification accuracy of the proposed method in this paper is more than 80%, indicating that visual features have a certain application value in the detection of driver fatigue. The results of this study can provide some suggestions for driver fatigue prevention and control and also help to ensure traffic safety.
{"title":"Driver fatigue discrimination method based on visual features","authors":"Shuwei Zhang, Xiao-hua Zhao","doi":"10.1117/12.2653023","DOIUrl":"https://doi.org/10.1117/12.2653023","url":null,"abstract":"Driver fatigue is a major cause of road accidents and kills tens of thousands of people per year. Eye movement and visual features are considered to be affected by driver fatigue. In this paper, a 120min driving simulation test was designed, and the Stanford Sleepiness Scale (SSS) subjective fatigue values and eye characteristics of 16 drivers were collected. Subjective fatigue values were divided into three grades: awake, awake-fatigue and fatigue. From the perspective of visual characteristics, the differences in saccade, blink, and fixation between awake and fatigue states were analyzed. Finally, saccade, blink, fixation, and combination methods to discriminate driver fatigue were compared according to the classification accuracy. The results show that whether drivers are awake or fatigued, their fixation duration is longer than blink duration, and blink duration is longer than saccade duration. Under driver fatigue, saccade duration and fixation duration decreased significantly, while blink duration increased significantly. The classification accuracy of the proposed method in this paper is more than 80%, indicating that visual features have a certain application value in the detection of driver fatigue. The results of this study can provide some suggestions for driver fatigue prevention and control and also help to ensure traffic safety.","PeriodicalId":116712,"journal":{"name":"Frontiers of Traffic and Transportation Engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130973402","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}
Information interaction is an important factor affecting the application of cooperative vehicle infrastructure system (CVIS). In order to evaluate the effectiveness level of cooperative vehicle infrastructure system (CVIS) information interaction with closed field test comprehensively and objectively, the analytic hierarchy process and fuzzy theory are used to study the effectiveness level of CVIS information interaction. By analyzing the key factors that affect the effect of CVIS information interaction, an effectiveness evaluation index system for the CVIS information interaction is established. And then, the analytic hierarchy process is used to determine the weight of the influence of different factors on the result of CVIS. By constructing the membership matrix, the fuzzy evaluation model is used to evaluate the effectiveness of CIVS. Finally, the method was experimentally verified by building an CVIS test system on a closed road with a networked vehicle, on-board unit (OBU), roadside unit (RSU) and wireless communication module. The effectiveness level of CVIS information interaction was obtained. The results show that the proposed evaluation results of CVIS information interaction can help to guide the update and development of in-vehicle devices and roadside devices.
{"title":"Test and effectiveness evaluation of cooperative vehicle infrastructure system information interaction based on fuzzy comprehensive evaluation","authors":"Zhuo Gao, Q. Yang","doi":"10.1117/12.2652470","DOIUrl":"https://doi.org/10.1117/12.2652470","url":null,"abstract":"Information interaction is an important factor affecting the application of cooperative vehicle infrastructure system (CVIS). In order to evaluate the effectiveness level of cooperative vehicle infrastructure system (CVIS) information interaction with closed field test comprehensively and objectively, the analytic hierarchy process and fuzzy theory are used to study the effectiveness level of CVIS information interaction. By analyzing the key factors that affect the effect of CVIS information interaction, an effectiveness evaluation index system for the CVIS information interaction is established. And then, the analytic hierarchy process is used to determine the weight of the influence of different factors on the result of CVIS. By constructing the membership matrix, the fuzzy evaluation model is used to evaluate the effectiveness of CIVS. Finally, the method was experimentally verified by building an CVIS test system on a closed road with a networked vehicle, on-board unit (OBU), roadside unit (RSU) and wireless communication module. The effectiveness level of CVIS information interaction was obtained. The results show that the proposed evaluation results of CVIS information interaction can help to guide the update and development of in-vehicle devices and roadside devices.","PeriodicalId":116712,"journal":{"name":"Frontiers of Traffic and Transportation Engineering","volume":"193 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133349060","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}
Hailong Ding, Dalin Xu, Sen Xu, Manwei Chang, Xinkuan Liu
To avoid the efficiency reduction of transit signal priority (TSP) control caused by inaccurate prediction of bus travel time, a time varying adaptive Kalman filter model is proposed in this paper. To present the transit speed fluctuation characteristics caused by various traffic factors, a model to calculate the dynamic factor is built based on weighted moving average time series method. With the introduction of dynamic factor, a time-varying adaptive Kalman filter model is established to predict bus travel time. This model is compared with other classical ones in experiment. The results show that the mean absolute percentage error (MAPE) of prediction is 2.52%, which is better than the basic Kalman filter model and time series model. Therefore, this method could not only consider the transit speed fluctuation but also significantly eliminate the detection deviation, which contributes to accurate prediction of bus travel time in transit signal priority control.
{"title":"Bus travel time prediction based on time-varying adaptive Kalman filter method","authors":"Hailong Ding, Dalin Xu, Sen Xu, Manwei Chang, Xinkuan Liu","doi":"10.1117/12.2652414","DOIUrl":"https://doi.org/10.1117/12.2652414","url":null,"abstract":"To avoid the efficiency reduction of transit signal priority (TSP) control caused by inaccurate prediction of bus travel time, a time varying adaptive Kalman filter model is proposed in this paper. To present the transit speed fluctuation characteristics caused by various traffic factors, a model to calculate the dynamic factor is built based on weighted moving average time series method. With the introduction of dynamic factor, a time-varying adaptive Kalman filter model is established to predict bus travel time. This model is compared with other classical ones in experiment. The results show that the mean absolute percentage error (MAPE) of prediction is 2.52%, which is better than the basic Kalman filter model and time series model. Therefore, this method could not only consider the transit speed fluctuation but also significantly eliminate the detection deviation, which contributes to accurate prediction of bus travel time in transit signal priority control.","PeriodicalId":116712,"journal":{"name":"Frontiers of Traffic and Transportation Engineering","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114342531","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}
Jianmeng Liu, Tao Liu, Dongqi Zhang, Yinying Liu, Zhenxing Yao
Land trip generation rate is an important parameter in the traffic planning field. To improve the evaluation accuracy of land trip generation rate, mobile phone signaling data is processed with an equal time interval algorithm to improve the accuracy of location information of individual users. By applying a stagnation point oscillation algorithm, hierarchical clustering analysis is conducted to extract information on individual OD chains. Based on this, the land trip generation rates under different land properties during peak hours are evaluated by space coupling and combining urban land use information databases. It can be summarized that the equal time interval algorithm and stagnation point oscillation algorithm can solve the time window problem and improve the accuracy of extracting users’ OD information. With this method, the evaluation accuracy rate of the land trip generation rate reaches 0.818, providing an effective reference for traffic planning.
{"title":"Analysis of land trip generation rates driven by mobile phone signaling data","authors":"Jianmeng Liu, Tao Liu, Dongqi Zhang, Yinying Liu, Zhenxing Yao","doi":"10.1117/12.2652713","DOIUrl":"https://doi.org/10.1117/12.2652713","url":null,"abstract":"Land trip generation rate is an important parameter in the traffic planning field. To improve the evaluation accuracy of land trip generation rate, mobile phone signaling data is processed with an equal time interval algorithm to improve the accuracy of location information of individual users. By applying a stagnation point oscillation algorithm, hierarchical clustering analysis is conducted to extract information on individual OD chains. Based on this, the land trip generation rates under different land properties during peak hours are evaluated by space coupling and combining urban land use information databases. It can be summarized that the equal time interval algorithm and stagnation point oscillation algorithm can solve the time window problem and improve the accuracy of extracting users’ OD information. With this method, the evaluation accuracy rate of the land trip generation rate reaches 0.818, providing an effective reference for traffic planning.","PeriodicalId":116712,"journal":{"name":"Frontiers of Traffic and Transportation Engineering","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114834432","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}
It is an important issue in the field of transportation planning to identify and detect the travel purpose of individual travelers. The mobile phone signaling data has the advantages of low collection cost, wide user coverage, and strong real-time performance in the 4G/5G networking environment. However, it is difficult to mine the travel characteristics effectively from the mobile phone signaling data with a large proportion of noise data to identify the travel purpose. This paper relies on the mobile phone signaling data of residents in Kunshan City, Jiangsu Province, China, to obtain individual travel segments, and then combines residents' travel survey data and POI data to mine individual travel information. The Bayesian network is preliminarily constructed through the constraint-based Bayesian network structure learning theory. This article takes the travel purpose as the deductive reasoning object, prunes the Bayesian network and achieves travel purpose identification. The results show that, based on the travel feature mining method proposed in this paper, the accuracy of travel purpose identification can reach 91.28% through the Bayesian network identification model.
{"title":"Travel purpose identification based on mobile phone signaling data and Bayesian network","authors":"Zhenbo Lu, Lin-feng Chai, Zeyu Feng, Juan Liu","doi":"10.1117/12.2652397","DOIUrl":"https://doi.org/10.1117/12.2652397","url":null,"abstract":"It is an important issue in the field of transportation planning to identify and detect the travel purpose of individual travelers. The mobile phone signaling data has the advantages of low collection cost, wide user coverage, and strong real-time performance in the 4G/5G networking environment. However, it is difficult to mine the travel characteristics effectively from the mobile phone signaling data with a large proportion of noise data to identify the travel purpose. This paper relies on the mobile phone signaling data of residents in Kunshan City, Jiangsu Province, China, to obtain individual travel segments, and then combines residents' travel survey data and POI data to mine individual travel information. The Bayesian network is preliminarily constructed through the constraint-based Bayesian network structure learning theory. This article takes the travel purpose as the deductive reasoning object, prunes the Bayesian network and achieves travel purpose identification. The results show that, based on the travel feature mining method proposed in this paper, the accuracy of travel purpose identification can reach 91.28% through the Bayesian network identification model.","PeriodicalId":116712,"journal":{"name":"Frontiers of Traffic and Transportation Engineering","volume":"2014 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127448032","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}
Market targeting of railway freight transport in the new development stage was studied, taking the influence of the shipper's preference into consideration. Based on literature analysis and railway freight characteristics, a selection indicator system for railway freight target market is constructed. The intuitionistic fuzzy mixed average operator is used to determine the indicators’ weight. By using the utility function theory, a utility function based on five freight service attributes is established to measure shippers’ preference, then the rail freight target market selection model considering shipper's preference was constructed.
{"title":"Research on market targeting of rail freight market: considering customers’ preferences for freight service","authors":"Y. Lan, Xiaodong Zhang","doi":"10.1117/12.2652392","DOIUrl":"https://doi.org/10.1117/12.2652392","url":null,"abstract":"Market targeting of railway freight transport in the new development stage was studied, taking the influence of the shipper's preference into consideration. Based on literature analysis and railway freight characteristics, a selection indicator system for railway freight target market is constructed. The intuitionistic fuzzy mixed average operator is used to determine the indicators’ weight. By using the utility function theory, a utility function based on five freight service attributes is established to measure shippers’ preference, then the rail freight target market selection model considering shipper's preference was constructed.","PeriodicalId":116712,"journal":{"name":"Frontiers of Traffic and Transportation Engineering","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132013425","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}
In order to study the pedestrian evacuation effect of three-dimensional ladder classroom with two different opening layouts, this paper simulates the process of pedestrian evacuation under two different opening layouts and compares the characteristics of pedestrian evacuation under two different opening layouts. The results show that when the number of people evacuated is the same, from the perspective of individual evacuation time, the evacuation time of pedestrians close to the aisle is shorter; from the perspective of the overall evacuation level, the evacuation efficiency of the front and rear openings on one side of the classroom is higher than that of the left and right openings in front of the classroom; from the evacuation density map, regardless of the opening layout, the location of pedestrian congestion is roughly the same.
{"title":"Research on pedestrian evacuation effect of three-dimensional ladder classroom with different exit layouts","authors":"Yanan Chen, Xiao-Hua Zhao","doi":"10.1117/12.2653015","DOIUrl":"https://doi.org/10.1117/12.2653015","url":null,"abstract":"In order to study the pedestrian evacuation effect of three-dimensional ladder classroom with two different opening layouts, this paper simulates the process of pedestrian evacuation under two different opening layouts and compares the characteristics of pedestrian evacuation under two different opening layouts. The results show that when the number of people evacuated is the same, from the perspective of individual evacuation time, the evacuation time of pedestrians close to the aisle is shorter; from the perspective of the overall evacuation level, the evacuation efficiency of the front and rear openings on one side of the classroom is higher than that of the left and right openings in front of the classroom; from the evacuation density map, regardless of the opening layout, the location of pedestrian congestion is roughly the same.","PeriodicalId":116712,"journal":{"name":"Frontiers of Traffic and Transportation Engineering","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123402236","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}
In recent years, China State Railway Group Co., Ltd. has issued policies to vigorously encourage the development of RAIL-SEA EXPRESS RS to enhance the supply capacity of freight products and achieve seamless connection between different transportation methods. The product service network is the basic prerequisites and conditions for the efficient operation of logistics activities. In order to accommodate growing demand for rail-sea multimodal transportation and provide customers with better logistics services. China State Railway Group Co., Ltd. need to scientifically plan the RAIL-SEA EXPRESS RS network. This paper uses the research method of intelligent logistics to design assembly points of RAIL-SEA EXPRESS RS. First of all, this paper sorts out the operation of RAIL-SEA EXPRESS RS and build a railway topology network. After that, this paper designs three evaluation indicators. These indicators are network connectivity level, economic development level, RAIL-SEA EXPRESS RS development level. Finally, this paper uses TOPSIS method to calculate the comprehensive score of each candidate city and analyzes their respective radiation range. After using research method of intelligent logistics, this paper selects out 12 first-level source assembly points and 16 second-level source assembly points.
{"title":"Intelligent location selection for source assembly points of RAIL-SEA EXPRESS RS","authors":"Ruohao Jia","doi":"10.1117/12.2652317","DOIUrl":"https://doi.org/10.1117/12.2652317","url":null,"abstract":"In recent years, China State Railway Group Co., Ltd. has issued policies to vigorously encourage the development of RAIL-SEA EXPRESS RS to enhance the supply capacity of freight products and achieve seamless connection between different transportation methods. The product service network is the basic prerequisites and conditions for the efficient operation of logistics activities. In order to accommodate growing demand for rail-sea multimodal transportation and provide customers with better logistics services. China State Railway Group Co., Ltd. need to scientifically plan the RAIL-SEA EXPRESS RS network. This paper uses the research method of intelligent logistics to design assembly points of RAIL-SEA EXPRESS RS. First of all, this paper sorts out the operation of RAIL-SEA EXPRESS RS and build a railway topology network. After that, this paper designs three evaluation indicators. These indicators are network connectivity level, economic development level, RAIL-SEA EXPRESS RS development level. Finally, this paper uses TOPSIS method to calculate the comprehensive score of each candidate city and analyzes their respective radiation range. After using research method of intelligent logistics, this paper selects out 12 first-level source assembly points and 16 second-level source assembly points.","PeriodicalId":116712,"journal":{"name":"Frontiers of Traffic and Transportation Engineering","volume":"213 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115976041","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}
Q. Ye, Huilun Xiang, Jihong Lv, Cong Cheng, Wei Zhao
Asphalt pavement is widely used in airports in China. Airport pavement under the long-term action of aircraft load and environmental load which makes various problems such as structural damage and performance degradation. As a preventive maintenance measure, the fog seal has timeliness. There is the best period for fog seal and the maintenance performance will be brought into full play. There is no specification of fog seal used in airport. Since many conventional performance evaluation indexes (PCI, etc.) of airport pavement without obvious change during use fog seal. This paper proposed a single pavement performance index to determine the appropriate use time of fog seal from the aspects of pavement service life, pavement relaxation, texture depth and water permeability coefficient. And the appropriate ranges of different indexes are studied according to the treatment purpose of fog seal. The research provides decision basis for airport pavement management department to carry out preventive maintenance.
{"title":"Study on maintenance time of airport pavement fog seal","authors":"Q. Ye, Huilun Xiang, Jihong Lv, Cong Cheng, Wei Zhao","doi":"10.1117/12.2652386","DOIUrl":"https://doi.org/10.1117/12.2652386","url":null,"abstract":"Asphalt pavement is widely used in airports in China. Airport pavement under the long-term action of aircraft load and environmental load which makes various problems such as structural damage and performance degradation. As a preventive maintenance measure, the fog seal has timeliness. There is the best period for fog seal and the maintenance performance will be brought into full play. There is no specification of fog seal used in airport. Since many conventional performance evaluation indexes (PCI, etc.) of airport pavement without obvious change during use fog seal. This paper proposed a single pavement performance index to determine the appropriate use time of fog seal from the aspects of pavement service life, pavement relaxation, texture depth and water permeability coefficient. And the appropriate ranges of different indexes are studied according to the treatment purpose of fog seal. The research provides decision basis for airport pavement management department to carry out preventive maintenance.","PeriodicalId":116712,"journal":{"name":"Frontiers of Traffic and Transportation Engineering","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116715709","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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