Pub Date : 2014-12-01DOI: 10.1109/IEVC.2014.7056209
G. Rizzoli, L. Zarri, M. Mengoni, A. Tani, L. Attilio, G. Serra, D. Casadei
Passive three-phase rectifier circuits are very popular for ac-dc power conversion. However, they do not have the capability to reverse the power flow, which is demanded by some recent potential smart-grid applications, such as vehicle-togrid (V2G) power transfer. This paper compares two structures of reversible battery chargers, i.e., an interleaved dc-dc converter fed by a three-phase power factor corrector rectifier and a three-phase ac-dc matrix converter, which may be suitable for plug-in electric vehicles. The comparison aims to estimate the power losses, the power capability and the size of the converters under common requirements.
{"title":"Comparison between an AC-DC matrix converter and an interleaved DC-dc converter with power factor corrector for plug-in electric vehicles","authors":"G. Rizzoli, L. Zarri, M. Mengoni, A. Tani, L. Attilio, G. Serra, D. Casadei","doi":"10.1109/IEVC.2014.7056209","DOIUrl":"https://doi.org/10.1109/IEVC.2014.7056209","url":null,"abstract":"Passive three-phase rectifier circuits are very popular for ac-dc power conversion. However, they do not have the capability to reverse the power flow, which is demanded by some recent potential smart-grid applications, such as vehicle-togrid (V2G) power transfer. This paper compares two structures of reversible battery chargers, i.e., an interleaved dc-dc converter fed by a three-phase power factor corrector rectifier and a three-phase ac-dc matrix converter, which may be suitable for plug-in electric vehicles. The comparison aims to estimate the power losses, the power capability and the size of the converters under common requirements.","PeriodicalId":223794,"journal":{"name":"2014 IEEE International Electric Vehicle Conference (IEVC)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126523659","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 : 2014-12-01DOI: 10.1109/IEVC.2014.7056144
Cristina Corchero, S. Gonzalez-Villafranca, M. Sanmartí
The electrification of the light vehicle fleets would be a reality in the coming decades. It is being studied through pilot experiences and surveys, how this change in the technology would affect the users driving behaviour. Obviously, new challenges appear, for instance the battery charging, which would be certainly different to the current needs and timings for filling up the internal combustion engine vehicles tanks. Analysis of real electric vehicle usage data is a key point in the development of the electric mobility. A large collection of electric vehicles and charging points have been monitored during three years and the results about the driving and charging patterns are shown in this work. These results may help to develop future charging infrastructure location and to evaluate the electric vehicle integration into the grid.
{"title":"European electric vehicle fleet: driving and charging data analysis","authors":"Cristina Corchero, S. Gonzalez-Villafranca, M. Sanmartí","doi":"10.1109/IEVC.2014.7056144","DOIUrl":"https://doi.org/10.1109/IEVC.2014.7056144","url":null,"abstract":"The electrification of the light vehicle fleets would be a reality in the coming decades. It is being studied through pilot experiences and surveys, how this change in the technology would affect the users driving behaviour. Obviously, new challenges appear, for instance the battery charging, which would be certainly different to the current needs and timings for filling up the internal combustion engine vehicles tanks. Analysis of real electric vehicle usage data is a key point in the development of the electric mobility. A large collection of electric vehicles and charging points have been monitored during three years and the results about the driving and charging patterns are shown in this work. These results may help to develop future charging infrastructure location and to evaluate the electric vehicle integration into the grid.","PeriodicalId":223794,"journal":{"name":"2014 IEEE International Electric Vehicle Conference (IEVC)","volume":"117 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116237313","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 : 2014-12-01DOI: 10.1109/IEVC.2014.7056180
S. Micari, G. Napoli, V. Antonucci, L. Andaloro
Charging infrastructures have a fundamental role in the diffusion of Electrical Vehicles (EVs). An insufficient number of these could have negative effects on the EVs diffusion. This paper is going to analyze the Italian territory in order to provide an evaluation regarding the number of charging stations that Italian highways need. First of all attention was paid about the number of electrical vehicles situated in each Italian regions. Then, a cartographic study of the territory followed in order to identify the highways network and the traffic flow in it and a study of the main characteristics of the EVs over the past few years was carried. Finally, simulation results have demonstrated that the developed method supports the evaluation about the number of the charging stations that the Italian highways need.
{"title":"Electric vehicles charging stations network - A preliminary evaluation about Italian highways","authors":"S. Micari, G. Napoli, V. Antonucci, L. Andaloro","doi":"10.1109/IEVC.2014.7056180","DOIUrl":"https://doi.org/10.1109/IEVC.2014.7056180","url":null,"abstract":"Charging infrastructures have a fundamental role in the diffusion of Electrical Vehicles (EVs). An insufficient number of these could have negative effects on the EVs diffusion. This paper is going to analyze the Italian territory in order to provide an evaluation regarding the number of charging stations that Italian highways need. First of all attention was paid about the number of electrical vehicles situated in each Italian regions. Then, a cartographic study of the territory followed in order to identify the highways network and the traffic flow in it and a study of the main characteristics of the EVs over the past few years was carried. Finally, simulation results have demonstrated that the developed method supports the evaluation about the number of the charging stations that the Italian highways need.","PeriodicalId":223794,"journal":{"name":"2014 IEEE International Electric Vehicle Conference (IEVC)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123781799","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 : 2014-12-01DOI: 10.1109/IEVC.2014.7056105
C. M. Martinez, E. Velenis, D. Tavernini, Bo Gao, M. Wellers
Recent advances in the automotive industry have incorporated the latest technology in vehicle electrification, with the aim to reduce fuel consumption, pollutants emissions, as well as enhance vehicle performance and safety. As a result, Electric Vehicles (EV) and Hybrid Electric Vehicles (HEV) have become the imminent automotive future, establishing important challenges in vehicle systems integration and control. In these vehicles, the regenerative braking is currently the major technique of energy recovery, providing accurate control on the brake torque applied. However regenerative brakes still need the support of conventional friction brakes, mainly due to the battery limitations. Consequently, the coordination of both braking strategies becomes critical for the safe actuation of braking related systems such as: ABS and ESP. Unfortunately, the torque blending between friction and regenerative brakes is a complicated task due to the different systems inputs; the regenerative brakes receive torque inputs, whilst the friction brakes work with pressure inputs. This paper proposes the friction brake torque estimation to simplify the torque blending, and improve the energy recovery and driving safety. The brake torque is estimated not only considering the pressure developed at the calipers, but also the brake disc temperature, and the wheel speed effect on the friction coefficient. The torque is obtained without installing additional sensors in the vehicle platform, considering that only wheel speed sensors are available. The estimation is performed using the extended version of the Kalman Filter. The results obtained are very satisfactory, and can improve the performance of the named systems in a safe way.
{"title":"Modelling and estimation of friction brake torque for a brake by wire system","authors":"C. M. Martinez, E. Velenis, D. Tavernini, Bo Gao, M. Wellers","doi":"10.1109/IEVC.2014.7056105","DOIUrl":"https://doi.org/10.1109/IEVC.2014.7056105","url":null,"abstract":"Recent advances in the automotive industry have incorporated the latest technology in vehicle electrification, with the aim to reduce fuel consumption, pollutants emissions, as well as enhance vehicle performance and safety. As a result, Electric Vehicles (EV) and Hybrid Electric Vehicles (HEV) have become the imminent automotive future, establishing important challenges in vehicle systems integration and control. In these vehicles, the regenerative braking is currently the major technique of energy recovery, providing accurate control on the brake torque applied. However regenerative brakes still need the support of conventional friction brakes, mainly due to the battery limitations. Consequently, the coordination of both braking strategies becomes critical for the safe actuation of braking related systems such as: ABS and ESP. Unfortunately, the torque blending between friction and regenerative brakes is a complicated task due to the different systems inputs; the regenerative brakes receive torque inputs, whilst the friction brakes work with pressure inputs. This paper proposes the friction brake torque estimation to simplify the torque blending, and improve the energy recovery and driving safety. The brake torque is estimated not only considering the pressure developed at the calipers, but also the brake disc temperature, and the wheel speed effect on the friction coefficient. The torque is obtained without installing additional sensors in the vehicle platform, considering that only wheel speed sensors are available. The estimation is performed using the extended version of the Kalman Filter. The results obtained are very satisfactory, and can improve the performance of the named systems in a safe way.","PeriodicalId":223794,"journal":{"name":"2014 IEEE International Electric Vehicle Conference (IEVC)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131647610","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 : 2014-12-01DOI: 10.1109/IEVC.2014.7056080
K. N. Mude, M. Bertoluzzo, G. Buja
Inductive Wireless Power Transfer (WPT) is advantageously used to charge the battery pack of the electric vehicles (EVs). The key component of any inductive WPT system is the coupling setup of the two coils, one buried in the road pavement and the other one embedded into the EV, since it plays an important role in the power transfer. This paper refers to the study case of a WPT system for charging the battery pack of an electric city-car and evaluates the inductive characteristics of different coil-coupling setups. The evaluation begins with a formula-based approach and continues with a computer-assisted analysis of the coil-coupling inductive parameters. The evaluation includes the study of the dependence of the parameters on coil distance, axial misalignment, and turn distance. The outcomes of the analysis are used to compare various coil-coupling setups in view of the implementation of a WPT system in the electric city-car of the study case.
{"title":"Inductive characteristics of different coupling setups for wireless charging of an electric city-car","authors":"K. N. Mude, M. Bertoluzzo, G. Buja","doi":"10.1109/IEVC.2014.7056080","DOIUrl":"https://doi.org/10.1109/IEVC.2014.7056080","url":null,"abstract":"Inductive Wireless Power Transfer (WPT) is advantageously used to charge the battery pack of the electric vehicles (EVs). The key component of any inductive WPT system is the coupling setup of the two coils, one buried in the road pavement and the other one embedded into the EV, since it plays an important role in the power transfer. This paper refers to the study case of a WPT system for charging the battery pack of an electric city-car and evaluates the inductive characteristics of different coil-coupling setups. The evaluation begins with a formula-based approach and continues with a computer-assisted analysis of the coil-coupling inductive parameters. The evaluation includes the study of the dependence of the parameters on coil distance, axial misalignment, and turn distance. The outcomes of the analysis are used to compare various coil-coupling setups in view of the implementation of a WPT system in the electric city-car of the study case.","PeriodicalId":223794,"journal":{"name":"2014 IEEE International Electric Vehicle Conference (IEVC)","volume":"191 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123003954","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 : 2014-12-01DOI: 10.1109/IEVC.2014.7056153
Jiantao Zhang, Chunbo Zhu, C. Chan
For solving the problems when charging the Automated Guided Vehicle (AGV) which is applied in the plant, a charging method based on a non-contact/wireless manner is proposed in this paper. By using this wireless charging method, the unsecure factors such as interface aging and low level of automation caused by using a traditional wire charging method are improved. Firstly, a simulation model of the resonant system at the primary-secondary side is established based on the principle of wireless energy transfer technology. Secondly, a hardware platform is designed based on a theoretical calculation of the resonant coupling simulation model, which meets the requirements of the AGV system. Finally, the distance between the transmitter and receiver can be adjusted from 20 mm to 35 mm. A constant-current charging strategy is employed in the wireless charging apparatus for charging six lead-acid batteries each has a capacity of 120Ah. The system efficiency reaches 80% during the charging process.
{"title":"A wireless power charging method for Automated Guided Vehicle","authors":"Jiantao Zhang, Chunbo Zhu, C. Chan","doi":"10.1109/IEVC.2014.7056153","DOIUrl":"https://doi.org/10.1109/IEVC.2014.7056153","url":null,"abstract":"For solving the problems when charging the Automated Guided Vehicle (AGV) which is applied in the plant, a charging method based on a non-contact/wireless manner is proposed in this paper. By using this wireless charging method, the unsecure factors such as interface aging and low level of automation caused by using a traditional wire charging method are improved. Firstly, a simulation model of the resonant system at the primary-secondary side is established based on the principle of wireless energy transfer technology. Secondly, a hardware platform is designed based on a theoretical calculation of the resonant coupling simulation model, which meets the requirements of the AGV system. Finally, the distance between the transmitter and receiver can be adjusted from 20 mm to 35 mm. A constant-current charging strategy is employed in the wireless charging apparatus for charging six lead-acid batteries each has a capacity of 120Ah. The system efficiency reaches 80% during the charging process.","PeriodicalId":223794,"journal":{"name":"2014 IEEE International Electric Vehicle Conference (IEVC)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121747112","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 : 2014-12-01DOI: 10.1109/IEVC.2014.7056176
A. Gil, Pablo Sauras-Perez, J. Taiber
Dynamic Wireless Power Transfer (WPT) is a developing technology which provides wireless extension of the power supply of an electric vehicle while it is in motion, allowing extending its range. Therefore, the communication between the roadside controller (RSC) and the onboard controller (OBC) needs to be wireless too. In order to support the deterministic behavior needed for WPT real-time control loops, the network needs to provide resource reservation for critical data streams via configuration, management, and/or protocol action, in addition to mobility. These characteristics cannot be addressed with the current networking solutions. Hence, a change in network design framework is required. This paper presents the characteristics of the communication system that need to be considered when designing WPT communication protocols and system architecture that supports realtime in motion control applications and highlights the path to standardization of protocols for communication for real-time control loops.
{"title":"Communication requirements for Dynamic Wireless Power Transfer for battery electric vehicles","authors":"A. Gil, Pablo Sauras-Perez, J. Taiber","doi":"10.1109/IEVC.2014.7056176","DOIUrl":"https://doi.org/10.1109/IEVC.2014.7056176","url":null,"abstract":"Dynamic Wireless Power Transfer (WPT) is a developing technology which provides wireless extension of the power supply of an electric vehicle while it is in motion, allowing extending its range. Therefore, the communication between the roadside controller (RSC) and the onboard controller (OBC) needs to be wireless too. In order to support the deterministic behavior needed for WPT real-time control loops, the network needs to provide resource reservation for critical data streams via configuration, management, and/or protocol action, in addition to mobility. These characteristics cannot be addressed with the current networking solutions. Hence, a change in network design framework is required. This paper presents the characteristics of the communication system that need to be considered when designing WPT communication protocols and system architecture that supports realtime in motion control applications and highlights the path to standardization of protocols for communication for real-time control loops.","PeriodicalId":223794,"journal":{"name":"2014 IEEE International Electric Vehicle Conference (IEVC)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123889431","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 : 2014-12-01DOI: 10.1109/IEVC.2014.7056175
L. Zuccaro, A. Di Giorgio, F. Liberati, S. Canale, Andrea Lanna, Victor Fernández Pallarés, Alejandro Martinez Blanco, Raul Urbano Escobar, J. Ratej, Borut Mehle, U. Krisper
This paper presents and discusses the electromobility management system developed in the context of the "SMARTV2G" project, enabling the automatic control of plug-in electric vehicles' (PEVs') charging processes. The paper describes the architecture and the software/hardware components of the electromobility management system. The focus is put in particular on the implementation of a centralized demand side management control algorithm, which allows remote real time control of the charging stations in the field, according to preferences and constraints expressed by all the actors involved (in particular the distribution system operator and the PEV users). The results of the field tests are reported and discussed, highlighting critical issues raised from the field experience.
{"title":"Smart vehicle to grid interface project: Electromobility management system architecture and field test results","authors":"L. Zuccaro, A. Di Giorgio, F. Liberati, S. Canale, Andrea Lanna, Victor Fernández Pallarés, Alejandro Martinez Blanco, Raul Urbano Escobar, J. Ratej, Borut Mehle, U. Krisper","doi":"10.1109/IEVC.2014.7056175","DOIUrl":"https://doi.org/10.1109/IEVC.2014.7056175","url":null,"abstract":"This paper presents and discusses the electromobility management system developed in the context of the \"SMARTV2G\" project, enabling the automatic control of plug-in electric vehicles' (PEVs') charging processes. The paper describes the architecture and the software/hardware components of the electromobility management system. The focus is put in particular on the implementation of a centralized demand side management control algorithm, which allows remote real time control of the charging stations in the field, according to preferences and constraints expressed by all the actors involved (in particular the distribution system operator and the PEV users). The results of the field tests are reported and discussed, highlighting critical issues raised from the field experience.","PeriodicalId":223794,"journal":{"name":"2014 IEEE International Electric Vehicle Conference (IEVC)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123931905","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 : 2014-12-01DOI: 10.1109/IEVC.2014.7056196
Szilard Jagasics, Istvan Vajda Obuda
There are quite much rotor configurations available for pmsm applications. All of them has advantages and disadvantages. This article copes with five usual rotor configurations simulated by FEA software using the same stator and winding system.
{"title":"Comparison of different PMSM rotor configurations","authors":"Szilard Jagasics, Istvan Vajda Obuda","doi":"10.1109/IEVC.2014.7056196","DOIUrl":"https://doi.org/10.1109/IEVC.2014.7056196","url":null,"abstract":"There are quite much rotor configurations available for pmsm applications. All of them has advantages and disadvantages. This article copes with five usual rotor configurations simulated by FEA software using the same stator and winding system.","PeriodicalId":223794,"journal":{"name":"2014 IEEE International Electric Vehicle Conference (IEVC)","volume":"05 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129215662","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 : 2014-12-01DOI: 10.1109/IEVC.2014.7056139
A. Popov, Michael Tybel, Michael Schugt
Charging systems and charging infrastructure are key components in the development and the introduction of electric and plug-in vehicles. The relative youth of the field and a long list of stakeholders (automotive industry, energy sector, governments, policy makers and customers) make the achievement of consensus on norms and standards difficult. The facts that vehicles are intrinsically mobile and hence require compatibility between manufacturers, countries and charging points, implies that the components of the charging systems should be extensively tested and must guarantee the desired interoperability. This paper summarizes the challenges that the charging-technology systems face and uses the results to derive the requirements on equipment for conducting tests and validation in the development, certification and end-of-line production stages.
{"title":"Power hardware-in-the-loop test bench for tests and verification of EV and EVSE charging systems","authors":"A. Popov, Michael Tybel, Michael Schugt","doi":"10.1109/IEVC.2014.7056139","DOIUrl":"https://doi.org/10.1109/IEVC.2014.7056139","url":null,"abstract":"Charging systems and charging infrastructure are key components in the development and the introduction of electric and plug-in vehicles. The relative youth of the field and a long list of stakeholders (automotive industry, energy sector, governments, policy makers and customers) make the achievement of consensus on norms and standards difficult. The facts that vehicles are intrinsically mobile and hence require compatibility between manufacturers, countries and charging points, implies that the components of the charging systems should be extensively tested and must guarantee the desired interoperability. This paper summarizes the challenges that the charging-technology systems face and uses the results to derive the requirements on equipment for conducting tests and validation in the development, certification and end-of-line production stages.","PeriodicalId":223794,"journal":{"name":"2014 IEEE International Electric Vehicle Conference (IEVC)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127679024","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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