Pub Date : 2019-10-01DOI: 10.1109/IECON.2019.8927130
Oguzhan Dalgic, A. Tekin, B. Ugurlu
This paper presents a method that aims to reduce the complex cabling problem in robotics applications, so as to prevent difficulties in troubleshooting processes and failures in case of cable breaks. Examples in the literature have proven the reliability of the Bluetooth Low Energy (BLE) based communication systems and indicated that it could be employed in sensor data transfer applications. Therefore, our solution to the aforementioned issue is independent joint modules that comprise a motor driver, a microcontroller for running servo control loops, and a BLE device that enables the module to communicate with the main processor of the robot without the need of bulky cabling. Target applications for this method are mobile robots that encapsulate onboard processors and actuators that are deployed within a short range.
{"title":"An Experimental Study of a Bluetooth Communication System for Robot Motion Control","authors":"Oguzhan Dalgic, A. Tekin, B. Ugurlu","doi":"10.1109/IECON.2019.8927130","DOIUrl":"https://doi.org/10.1109/IECON.2019.8927130","url":null,"abstract":"This paper presents a method that aims to reduce the complex cabling problem in robotics applications, so as to prevent difficulties in troubleshooting processes and failures in case of cable breaks. Examples in the literature have proven the reliability of the Bluetooth Low Energy (BLE) based communication systems and indicated that it could be employed in sensor data transfer applications. Therefore, our solution to the aforementioned issue is independent joint modules that comprise a motor driver, a microcontroller for running servo control loops, and a BLE device that enables the module to communicate with the main processor of the robot without the need of bulky cabling. Target applications for this method are mobile robots that encapsulate onboard processors and actuators that are deployed within a short range.","PeriodicalId":187719,"journal":{"name":"IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124954161","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 : 2019-10-01DOI: 10.1109/IECON.2019.8927581
Bo Guan, Xiong Du
As a key method to realize a high-performance control of IPMSM in six-step mode, which is of benefit to reduce the switching frequency and increase the output voltage, the conventional voltage phase controller can adjust the output torque by amending the voltage phase through an integrator. However, the assumption that the relationship between the torque and voltage phase is monotonically increasing, is not always correct. In fact, motor parameters may change the relationship, which results in the failure of driving the motor for the conventional voltage phase controller. In this paper, we analyze the effect of motor parameters on the monotonicity. Then, point out that the assumption in the conventional way is a critical limit for the voltage phase control of some motors. It limits the operation region seriously. After achieving the condition that can judge which case the relationship between the torque and voltage phase is in, a model based voltage phase controller in six-step mode for IPMSM is proposed. The operation region, which is not suitable for some conventional ways, can be approached well for the proposed method. Finally, some simulation results are also given to prove the correctness and feasibility of the proposed method.
{"title":"A Model based Voltage Phase Controller in Six-step Mode for IPMSM with an Extending Operation Region","authors":"Bo Guan, Xiong Du","doi":"10.1109/IECON.2019.8927581","DOIUrl":"https://doi.org/10.1109/IECON.2019.8927581","url":null,"abstract":"As a key method to realize a high-performance control of IPMSM in six-step mode, which is of benefit to reduce the switching frequency and increase the output voltage, the conventional voltage phase controller can adjust the output torque by amending the voltage phase through an integrator. However, the assumption that the relationship between the torque and voltage phase is monotonically increasing, is not always correct. In fact, motor parameters may change the relationship, which results in the failure of driving the motor for the conventional voltage phase controller. In this paper, we analyze the effect of motor parameters on the monotonicity. Then, point out that the assumption in the conventional way is a critical limit for the voltage phase control of some motors. It limits the operation region seriously. After achieving the condition that can judge which case the relationship between the torque and voltage phase is in, a model based voltage phase controller in six-step mode for IPMSM is proposed. The operation region, which is not suitable for some conventional ways, can be approached well for the proposed method. Finally, some simulation results are also given to prove the correctness and feasibility of the proposed method.","PeriodicalId":187719,"journal":{"name":"IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125117188","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 : 2019-10-01DOI: 10.1109/IECON.2019.8926908
I. Grobelna, R. Wiśniewski, Marcin Wojnakowski
The paper shows the application of interpreted nets for the specification of the cyber-physical system control unit. In particular, live and safe Petri nets are taken into account in order to present the concurrency relations in the designed system. Additionally, such nets include additional input and output signals used for communication with the environment. A CPS specified by the interpreted net can be easily verified (with the application of formal methods), analyzed, decomposed and even implemented (as an integrated or distributed system). The presented idea is illustrated by a manufacturing system case study.
{"title":"Specification of Cyber-Physical Systems with the Application of Interpreted Nets","authors":"I. Grobelna, R. Wiśniewski, Marcin Wojnakowski","doi":"10.1109/IECON.2019.8926908","DOIUrl":"https://doi.org/10.1109/IECON.2019.8926908","url":null,"abstract":"The paper shows the application of interpreted nets for the specification of the cyber-physical system control unit. In particular, live and safe Petri nets are taken into account in order to present the concurrency relations in the designed system. Additionally, such nets include additional input and output signals used for communication with the environment. A CPS specified by the interpreted net can be easily verified (with the application of formal methods), analyzed, decomposed and even implemented (as an integrated or distributed system). The presented idea is illustrated by a manufacturing system case study.","PeriodicalId":187719,"journal":{"name":"IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society","volume":"731 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125192028","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 : 2019-10-01DOI: 10.1109/IECON.2019.8927003
Alireza Jaribion, Siavash H. Khajavi, J. Holmström
In this paper, a use case related to smart buildings is presented to illustrate the application of IoT-enabled workplaces. The data collected from two office spaces are compared using efficient data analytics method. For this comparison, the environmental factors considered are temperature, humidity, air quality, and workplace particle numbers. This paper demonstrates how to build IoT-enabled workplaces and illustrates its actual benefits to energy management and remote systems monitoring and control. A survey was conducted by the Department of Industrial Engineering and Management at Aalto University, and responses were submitted from 50 unique users to illustrate the incentives regarding IoT-enabled workplaces and to study occupants' preferences. Moreover, the research results contribute to the facility management of companies and organizations by suggesting novel methods for providing more efficient and effective IoT-enabled workplaces.
{"title":"IoT-Enabled Workplaces: A Case Study of Energy Management and Data Analytics","authors":"Alireza Jaribion, Siavash H. Khajavi, J. Holmström","doi":"10.1109/IECON.2019.8927003","DOIUrl":"https://doi.org/10.1109/IECON.2019.8927003","url":null,"abstract":"In this paper, a use case related to smart buildings is presented to illustrate the application of IoT-enabled workplaces. The data collected from two office spaces are compared using efficient data analytics method. For this comparison, the environmental factors considered are temperature, humidity, air quality, and workplace particle numbers. This paper demonstrates how to build IoT-enabled workplaces and illustrates its actual benefits to energy management and remote systems monitoring and control. A survey was conducted by the Department of Industrial Engineering and Management at Aalto University, and responses were submitted from 50 unique users to illustrate the incentives regarding IoT-enabled workplaces and to study occupants' preferences. Moreover, the research results contribute to the facility management of companies and organizations by suggesting novel methods for providing more efficient and effective IoT-enabled workplaces.","PeriodicalId":187719,"journal":{"name":"IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125836867","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 : 2019-10-01DOI: 10.1109/IECON.2019.8926964
Manuel A. Díaz, C. Baier, F. Rojas, A. Garcés, M. Torres, M. Pérez
In this paper, a virtual synchronous generation (VSG) strategy is proposed for a three-phase quasi-impedance source inverter (qZSI). The main objective of the scheme is to provide inertia and damping to the inverter operation in order to add those characteristics to the system in the form of ancillary services, thus contributing a more stable operation of the microgrid where the inverter is operating. The generated references are received by linear control loops on the dc and ac sides of the three-phase qZSI. In the development of this work, the theoretical foundations of the proposal are shown. Also, to prove that the strategy helps to improve the response of the system, simulated results of the qZSI connected to a weak grid are displayed, showing data of the inverter operating in a traditional form (without inertia) and as a VSG, to make comparisons.
{"title":"A Virtual Synchronous Generator Strategy for a Grid-Connected qZSI","authors":"Manuel A. Díaz, C. Baier, F. Rojas, A. Garcés, M. Torres, M. Pérez","doi":"10.1109/IECON.2019.8926964","DOIUrl":"https://doi.org/10.1109/IECON.2019.8926964","url":null,"abstract":"In this paper, a virtual synchronous generation (VSG) strategy is proposed for a three-phase quasi-impedance source inverter (qZSI). The main objective of the scheme is to provide inertia and damping to the inverter operation in order to add those characteristics to the system in the form of ancillary services, thus contributing a more stable operation of the microgrid where the inverter is operating. The generated references are received by linear control loops on the dc and ac sides of the three-phase qZSI. In the development of this work, the theoretical foundations of the proposal are shown. Also, to prove that the strategy helps to improve the response of the system, simulated results of the qZSI connected to a weak grid are displayed, showing data of the inverter operating in a traditional form (without inertia) and as a VSG, to make comparisons.","PeriodicalId":187719,"journal":{"name":"IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125918117","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 : 2019-10-01DOI: 10.1109/IECON.2019.8926695
P. Dworakowski, A. Wilk, M. Michna, B. Lefebvre, T. Lagier
The article presents a three-phase Medium Frequency Transformer being a part of a 100kW 1.2kV 20kHz Dual Active Bridge DC-DC converter. The transformer design is detailed focusing on winding and core power loss calculation. The high power three-phase MFT prototype is presented. The experimental results include the transformer impedance characteristics, no load test and three-phase DAB full load test waveforms.
{"title":"3-phase medium frequency transformer for a 100kW 1.2kV 20kHz Dual Active Bridge converter","authors":"P. Dworakowski, A. Wilk, M. Michna, B. Lefebvre, T. Lagier","doi":"10.1109/IECON.2019.8926695","DOIUrl":"https://doi.org/10.1109/IECON.2019.8926695","url":null,"abstract":"The article presents a three-phase Medium Frequency Transformer being a part of a 100kW 1.2kV 20kHz Dual Active Bridge DC-DC converter. The transformer design is detailed focusing on winding and core power loss calculation. The high power three-phase MFT prototype is presented. The experimental results include the transformer impedance characteristics, no load test and three-phase DAB full load test waveforms.","PeriodicalId":187719,"journal":{"name":"IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123262202","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 : 2019-10-01DOI: 10.1109/IECON.2019.8927437
Daniel Gomes, R. Campos-Rebelo, F. Moutinho
A web-based editor for Signal Interpretation Models (SIM) is presented in this paper. SIM is a modeling formalism specifically created to specify the occurrence of events based on signals variation. This formalism goal is not only to specify but also to support the validation and implementation of signals interpreters. These signals can be system input signals (environment signals) or system internal signals. The created web-based editor uses Asynchronous JavaScript and XML (AJAX) principles and runs at standard browsers. It supports the creation/edition of graphical SIM models, which are saved in XML files. The XML format and the well defined execution semantics of the SIM formalism, enable the integration of SIM with other tools. This means that the created models can be used as inputs in tools, such as automatic code generators, to create simulation or execution code (namely JavaScript, C, and VHDL). To illustrate the application of the developed editor, the model of a system that detects temperature sensor faults is presented. The created edition tool prototype is currently available at http://gres.uninova.pt/SIM-Tools/.
{"title":"Web-based Editor for Signal Interpretation Models","authors":"Daniel Gomes, R. Campos-Rebelo, F. Moutinho","doi":"10.1109/IECON.2019.8927437","DOIUrl":"https://doi.org/10.1109/IECON.2019.8927437","url":null,"abstract":"A web-based editor for Signal Interpretation Models (SIM) is presented in this paper. SIM is a modeling formalism specifically created to specify the occurrence of events based on signals variation. This formalism goal is not only to specify but also to support the validation and implementation of signals interpreters. These signals can be system input signals (environment signals) or system internal signals. The created web-based editor uses Asynchronous JavaScript and XML (AJAX) principles and runs at standard browsers. It supports the creation/edition of graphical SIM models, which are saved in XML files. The XML format and the well defined execution semantics of the SIM formalism, enable the integration of SIM with other tools. This means that the created models can be used as inputs in tools, such as automatic code generators, to create simulation or execution code (namely JavaScript, C, and VHDL). To illustrate the application of the developed editor, the model of a system that detects temperature sensor faults is presented. The created edition tool prototype is currently available at http://gres.uninova.pt/SIM-Tools/.","PeriodicalId":187719,"journal":{"name":"IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society","volume":"96 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125295663","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 : 2019-10-01DOI: 10.1109/IECON.2019.8927236
F. Pérez-Cebolla, A. Martinez-Iturbe, B. Martín-del-Brío, C. Bernal-Ruíz, J. S. Artal-Sevil, P. Pastor-Flores
In this paper a nonlinear dynamic lumped circuit model of a switched reluctance motor is proposed. This model includes the effect of core losses and leakage inductance. The parameters of the nonlinear circuit are identified from the experimental flux linkage and phase current. The proposed model, compared to other available static models, allows the coupling between electrical and mechanical phenomena and, therefore, it is suitable for the characterization of the full rotating behaviour of the motor. This nonlinear model is based on the space-state framework and it is implemented in Matlab-Simulink. Model accuracy has been verified at both, constant speed and accelerating; the correct fit between the model and a real switched reluctance machine is shown. The accurate fit of the stator waveform obtained in model simulations with experimental measurements proves both, the accuracy of the proposed model and the correct estimation of its components. All these parameters are non-linearly dependent on the current and the actual rotor position.
{"title":"Nonlinear Dynamic Equivalent Circuit of a Switched Reluctance Motor Considering Core Losses and Leakage Inductance","authors":"F. Pérez-Cebolla, A. Martinez-Iturbe, B. Martín-del-Brío, C. Bernal-Ruíz, J. S. Artal-Sevil, P. Pastor-Flores","doi":"10.1109/IECON.2019.8927236","DOIUrl":"https://doi.org/10.1109/IECON.2019.8927236","url":null,"abstract":"In this paper a nonlinear dynamic lumped circuit model of a switched reluctance motor is proposed. This model includes the effect of core losses and leakage inductance. The parameters of the nonlinear circuit are identified from the experimental flux linkage and phase current. The proposed model, compared to other available static models, allows the coupling between electrical and mechanical phenomena and, therefore, it is suitable for the characterization of the full rotating behaviour of the motor. This nonlinear model is based on the space-state framework and it is implemented in Matlab-Simulink. Model accuracy has been verified at both, constant speed and accelerating; the correct fit between the model and a real switched reluctance machine is shown. The accurate fit of the stator waveform obtained in model simulations with experimental measurements proves both, the accuracy of the proposed model and the correct estimation of its components. All these parameters are non-linearly dependent on the current and the actual rotor position.","PeriodicalId":187719,"journal":{"name":"IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125315928","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 : 2019-10-01DOI: 10.1109/IECON.2019.8927743
Dong Liu, Yanbo Wang, Zhe Chen
This paper proposes a zero-voltage and zero-current switching (ZVZCS) DC/DC converter characterized by 1) capacitive output and 2) input-series output-parallel (ISOP) structure for the high input voltage and high-power applications. The proposed converter can reduce the circulating current and duty cycle loss in comparison with the conventional converter with the inductive output. More significantly, the proposed converter can also effectively reduce the ripple current on the secondary clamping capacitor. Therefore, the proposed converter can improve the reliability of the secondary clamping capacitor. The characteristics and performances of the proposed converter are analyzed in detail. Finally, the simulation results verify the proposed converter.
{"title":"A ZVZCS DC/DC Converter with Capacitive Output and Input-series Ouput-parallel (ISOP) Structure","authors":"Dong Liu, Yanbo Wang, Zhe Chen","doi":"10.1109/IECON.2019.8927743","DOIUrl":"https://doi.org/10.1109/IECON.2019.8927743","url":null,"abstract":"This paper proposes a zero-voltage and zero-current switching (ZVZCS) DC/DC converter characterized by 1) capacitive output and 2) input-series output-parallel (ISOP) structure for the high input voltage and high-power applications. The proposed converter can reduce the circulating current and duty cycle loss in comparison with the conventional converter with the inductive output. More significantly, the proposed converter can also effectively reduce the ripple current on the secondary clamping capacitor. Therefore, the proposed converter can improve the reliability of the secondary clamping capacitor. The characteristics and performances of the proposed converter are analyzed in detail. Finally, the simulation results verify the proposed converter.","PeriodicalId":187719,"journal":{"name":"IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125342802","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 : 2019-10-01DOI: 10.1109/IECON.2019.8927366
Giuseppe Mauromicale, A. Raciti, S. Rizzo, G. Susinni, L. Abbatelli, S. Buonomo, D. Cavallaro, V. Giuffrida
Nowadays, there is a great research effort in the field of electric vehicles. In such a context, SiC power modules play a key role for their effective and widespread diffusion especially due to their ability at improving the performance of the traction inverter. The advantages and issues related to SiC traction modules are analysed in this work giving also guidelines for viable solutions. More specifically, electrical and thermal problems, safety and reliability issues, challenges from device paralleling and module layout as well as power efficiency, have been investigated. The aim of this work is to collect all these aspects that must be carefully considered at the SiC power modules design stage. The main merit of this overview is their analysis performed by means of on field experience, in terms of experimental tests, finite element analysis, and circuit simulations.
{"title":"SiC Power Modules for Traction Inverters in Automotive Applications","authors":"Giuseppe Mauromicale, A. Raciti, S. Rizzo, G. Susinni, L. Abbatelli, S. Buonomo, D. Cavallaro, V. Giuffrida","doi":"10.1109/IECON.2019.8927366","DOIUrl":"https://doi.org/10.1109/IECON.2019.8927366","url":null,"abstract":"Nowadays, there is a great research effort in the field of electric vehicles. In such a context, SiC power modules play a key role for their effective and widespread diffusion especially due to their ability at improving the performance of the traction inverter. The advantages and issues related to SiC traction modules are analysed in this work giving also guidelines for viable solutions. More specifically, electrical and thermal problems, safety and reliability issues, challenges from device paralleling and module layout as well as power efficiency, have been investigated. The aim of this work is to collect all these aspects that must be carefully considered at the SiC power modules design stage. The main merit of this overview is their analysis performed by means of on field experience, in terms of experimental tests, finite element analysis, and circuit simulations.","PeriodicalId":187719,"journal":{"name":"IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126612165","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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