Pub Date : 2018-10-01DOI: 10.1109/EPEC.2018.8598289
Terry Branch
This paper describes how key clauses in CSA Z463 “Maintenance of Electrical Systems” can be used to build a Foundation for Electrical Risk Management (FFERM) to manage risks in electrical power distribution systems for workplace safety. The FFERM would apply to managing electrical risks in solar photovoltaic (PV) power systems, wind generating power systems, and electric vehicle service equipment also. The paper describes how CSA Z463 can be used by organizations to reduce risks in existing electrical equipment and systems. The impact on worker safety whenever electrical systems are not maintained is also examined. We will discuss key features covered in CSA Z463 clauses which are important in building a solid electrical risk management foundation for workplace safety. These include the electrical maintenance program, electrical systems risk assessment, electrical maintenance strategies, and planning electrical maintenance tasks for execution. The approach that organizations should take in order to establish an electrical maintenance program (EMP) within their overall existing asset management system (AMS) is not covered in this paper. Organizations should however, consider integrating within their AMS the concepts discussed. These concepts support the sustainability of the administration process in managing electrical risks. In addition to improving workplace safety, the CSA Z463 standard provides organizations with opportunities for cost-effective solutions to achieve their safety objectives.
{"title":"Using CSA Z463 Standard to Build a Foundation for Electrical Risk Management (FFERM)","authors":"Terry Branch","doi":"10.1109/EPEC.2018.8598289","DOIUrl":"https://doi.org/10.1109/EPEC.2018.8598289","url":null,"abstract":"This paper describes how key clauses in CSA Z463 “Maintenance of Electrical Systems” can be used to build a Foundation for Electrical Risk Management (FFERM) to manage risks in electrical power distribution systems for workplace safety. The FFERM would apply to managing electrical risks in solar photovoltaic (PV) power systems, wind generating power systems, and electric vehicle service equipment also. The paper describes how CSA Z463 can be used by organizations to reduce risks in existing electrical equipment and systems. The impact on worker safety whenever electrical systems are not maintained is also examined. We will discuss key features covered in CSA Z463 clauses which are important in building a solid electrical risk management foundation for workplace safety. These include the electrical maintenance program, electrical systems risk assessment, electrical maintenance strategies, and planning electrical maintenance tasks for execution. The approach that organizations should take in order to establish an electrical maintenance program (EMP) within their overall existing asset management system (AMS) is not covered in this paper. Organizations should however, consider integrating within their AMS the concepts discussed. These concepts support the sustainability of the administration process in managing electrical risks. In addition to improving workplace safety, the CSA Z463 standard provides organizations with opportunities for cost-effective solutions to achieve their safety objectives.","PeriodicalId":265297,"journal":{"name":"2018 IEEE Electrical Power and Energy Conference (EPEC)","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134011611","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 : 2018-10-01DOI: 10.1109/EPEC.2018.8598392
Hang Li, A. Gole, C. N. Ho
This paper presents a demonstration of Real-Time High-Speed Controller Hardware-in-the-Loop (CHIL) testing for a DSP-based controller of a Shunt Active Power Filter (APF) for medium voltage (MV) grid power quality improvements. A Real-Time simulator (RT Box) and a Digital Signal Processor (DSP) are used for the CHIL simulation to validate the control algorithms which are implemented in a commercial low-cost DSP. Two control loops have been used in the control system. The filter reference current is extracted based on synchronous reference frame. Hysteresis current control is employed as the inner control loop for generating switching signals. The DC side capacitor voltage of the APF is maintained by a PI controller. The results show the APF associated with the implemented controller can mitigate variety power quality problems, such as harmonic elimination, power factor correction, and load balancing. The whole CHIL simulation system work stable with high switching frequency.
{"title":"Controller Implementation and Performance Evaluation of a High Power Three-Phase Active Power Filter using Controller Hardware-in-the-Loop Simulation","authors":"Hang Li, A. Gole, C. N. Ho","doi":"10.1109/EPEC.2018.8598392","DOIUrl":"https://doi.org/10.1109/EPEC.2018.8598392","url":null,"abstract":"This paper presents a demonstration of Real-Time High-Speed Controller Hardware-in-the-Loop (CHIL) testing for a DSP-based controller of a Shunt Active Power Filter (APF) for medium voltage (MV) grid power quality improvements. A Real-Time simulator (RT Box) and a Digital Signal Processor (DSP) are used for the CHIL simulation to validate the control algorithms which are implemented in a commercial low-cost DSP. Two control loops have been used in the control system. The filter reference current is extracted based on synchronous reference frame. Hysteresis current control is employed as the inner control loop for generating switching signals. The DC side capacitor voltage of the APF is maintained by a PI controller. The results show the APF associated with the implemented controller can mitigate variety power quality problems, such as harmonic elimination, power factor correction, and load balancing. The whole CHIL simulation system work stable with high switching frequency.","PeriodicalId":265297,"journal":{"name":"2018 IEEE Electrical Power and Energy Conference (EPEC)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134568987","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 : 2018-10-01DOI: 10.1109/EPEC.2018.8598450
Abolfazl Rahimneiad, Ibrahim Al-Omari, Reza Barzegaran, H. Karimipour
Although many algorithms have been proposed for power system Harmonic Estimation (HE), most of them suffer from slow convergence and low accuracy. In this paper, a new HE strategy with real-time tracking of amplitude and phase angle of each harmonic component is presented. The proposed method employs linear Least Squares (LS) estimator and improved Bacterial Foraging Optimization (BFO) algorithm for phase angle and magnitude estimation, respectively. The proposed method decomposes the harmonics estimation problem into two problems; linear for amplitude estimation and nonlinear for phase estimation. The aim of this paper is to present an efficient and accurate approach for harmonic parameters estimation. Multiple scenarios are considered to evaluate efficiency and accuracy of the proposed technique. Simulation analysis and investigation of the effects on power system are carried out in MAT LAB and PSCAD software.
{"title":"Hybrid Harmonic Estimation Based on Least Square Method and Bacterial Foraging Optimization","authors":"Abolfazl Rahimneiad, Ibrahim Al-Omari, Reza Barzegaran, H. Karimipour","doi":"10.1109/EPEC.2018.8598450","DOIUrl":"https://doi.org/10.1109/EPEC.2018.8598450","url":null,"abstract":"Although many algorithms have been proposed for power system Harmonic Estimation (HE), most of them suffer from slow convergence and low accuracy. In this paper, a new HE strategy with real-time tracking of amplitude and phase angle of each harmonic component is presented. The proposed method employs linear Least Squares (LS) estimator and improved Bacterial Foraging Optimization (BFO) algorithm for phase angle and magnitude estimation, respectively. The proposed method decomposes the harmonics estimation problem into two problems; linear for amplitude estimation and nonlinear for phase estimation. The aim of this paper is to present an efficient and accurate approach for harmonic parameters estimation. Multiple scenarios are considered to evaluate efficiency and accuracy of the proposed technique. Simulation analysis and investigation of the effects on power system are carried out in MAT LAB and PSCAD software.","PeriodicalId":265297,"journal":{"name":"2018 IEEE Electrical Power and Energy Conference (EPEC)","volume":"248 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124408753","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 : 2018-10-01DOI: 10.1109/EPEC.2018.8598415
I. Vidanalage, Carlos Sabillon, B. Venkatesh, R. Torquato, W. Freitas
Merchant-owned charging stations will replace gasoline stations in the near future. As charging times of electric vehicles (EV) may be significant, without optimization, customers will wait to get charged without knowing the actual period of charging. In addition, the charging facility will not be aware of optimum charging power levels and the charging time to minimize costs. In this paper, an optimal EV charging method is proposed that minimizes the total cost for a merchant-owned charging facility with multiple chargers. The formulation considers energy costs, demand charge, connected transformer capacity, charger capacities and EV power capacities. The optimal schedule for the day can be determined ahead of time such that the customers can be informed of the cost and charging schedule. This is a complex mixed-integer linear optimization challenge with three-dimensional matrices. In this paper several cases are studied using the proposed algorithm. It is fast and efficient. This methodology would be highly useful for merchant-owned EV charging facilities and it is ready for the industrial applications.
{"title":"Scheduling of Merchant-Owned EV Charging at a Charging Facility with Multiple Chargers","authors":"I. Vidanalage, Carlos Sabillon, B. Venkatesh, R. Torquato, W. Freitas","doi":"10.1109/EPEC.2018.8598415","DOIUrl":"https://doi.org/10.1109/EPEC.2018.8598415","url":null,"abstract":"Merchant-owned charging stations will replace gasoline stations in the near future. As charging times of electric vehicles (EV) may be significant, without optimization, customers will wait to get charged without knowing the actual period of charging. In addition, the charging facility will not be aware of optimum charging power levels and the charging time to minimize costs. In this paper, an optimal EV charging method is proposed that minimizes the total cost for a merchant-owned charging facility with multiple chargers. The formulation considers energy costs, demand charge, connected transformer capacity, charger capacities and EV power capacities. The optimal schedule for the day can be determined ahead of time such that the customers can be informed of the cost and charging schedule. This is a complex mixed-integer linear optimization challenge with three-dimensional matrices. In this paper several cases are studied using the proposed algorithm. It is fast and efficient. This methodology would be highly useful for merchant-owned EV charging facilities and it is ready for the industrial applications.","PeriodicalId":265297,"journal":{"name":"2018 IEEE Electrical Power and Energy Conference (EPEC)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121238064","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 : 2018-10-01DOI: 10.1109/EPEC.2018.8598388
Mahdi Ben Ghorbel, Md. Jahangir Hossain, Sabbir U. Ahmad
In this paper, we introduce an energy efficient communication architecture that encourages the use of renewable energy through exchange of power and dynamic access. The base stations (BSs) are often equipped with renewable energy generators, but the random availability of this energy combined with the users' demand heterogeneity, make the use of this energy inefficient. Thus, we propose to improve it through cooperation between BSs by (i) exchanging the energy among them, and (ii) dynamically assigning users and available resources. We formulate an optimization problem that maximizes a generic objective function combining the users satisfaction and the network energy consumption cost. The different degrees of freedom in the system, ranging from assignment of users to BSs, exchange of available energy, and dynamic allocation of the bandwidth are considered while the budget power and bandwidth constraints are taken into account. We show that the optimization problem can be written as a mixed-integer linear problem (MILP). Simulation results confirm the important savings in non-renewable power consumption and enhanced throughput that can be reached using the proposed collaborative scheme, despite the exchange power losses.
{"title":"Cooperative Scheme for Efficient Communication using Renewable-Powered Base Stations","authors":"Mahdi Ben Ghorbel, Md. Jahangir Hossain, Sabbir U. Ahmad","doi":"10.1109/EPEC.2018.8598388","DOIUrl":"https://doi.org/10.1109/EPEC.2018.8598388","url":null,"abstract":"In this paper, we introduce an energy efficient communication architecture that encourages the use of renewable energy through exchange of power and dynamic access. The base stations (BSs) are often equipped with renewable energy generators, but the random availability of this energy combined with the users' demand heterogeneity, make the use of this energy inefficient. Thus, we propose to improve it through cooperation between BSs by (i) exchanging the energy among them, and (ii) dynamically assigning users and available resources. We formulate an optimization problem that maximizes a generic objective function combining the users satisfaction and the network energy consumption cost. The different degrees of freedom in the system, ranging from assignment of users to BSs, exchange of available energy, and dynamic allocation of the bandwidth are considered while the budget power and bandwidth constraints are taken into account. We show that the optimization problem can be written as a mixed-integer linear problem (MILP). Simulation results confirm the important savings in non-renewable power consumption and enhanced throughput that can be reached using the proposed collaborative scheme, despite the exchange power losses.","PeriodicalId":265297,"journal":{"name":"2018 IEEE Electrical Power and Energy Conference (EPEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129225101","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 : 2018-10-01DOI: 10.1109/EPEC.2018.8598404
Michael Bardwell, Jason Wong, Steven Zhang, P. Musílek
The design process for integrating photovoltaic (PV) maximum power point tracking (MPPT) with the Internet of Things (IoT) is discussed in detail. Required calculations, popular tracking algorithms, and converter linearity nuances are discussed surrounding a common PV system topology. A buck converter is simulated in MATLAB Simulink to confirm stable operation when perturbed by the calculated values. High resolution irradiance data was statistically analysed to provide the average irradiance slope value required to calculate a minimum duty cycle perturbation step size.
{"title":"IoT-based MPPT Controller for Photovoltaic Array","authors":"Michael Bardwell, Jason Wong, Steven Zhang, P. Musílek","doi":"10.1109/EPEC.2018.8598404","DOIUrl":"https://doi.org/10.1109/EPEC.2018.8598404","url":null,"abstract":"The design process for integrating photovoltaic (PV) maximum power point tracking (MPPT) with the Internet of Things (IoT) is discussed in detail. Required calculations, popular tracking algorithms, and converter linearity nuances are discussed surrounding a common PV system topology. A buck converter is simulated in MATLAB Simulink to confirm stable operation when perturbed by the calculated values. High resolution irradiance data was statistically analysed to provide the average irradiance slope value required to calculate a minimum duty cycle perturbation step size.","PeriodicalId":265297,"journal":{"name":"2018 IEEE Electrical Power and Energy Conference (EPEC)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116666765","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 : 2018-10-01DOI: 10.1109/EPEC.2018.8598325
Shahrzad Karami, A. Siadatan, A. Hekmati
Generally we can gain high current density and decrease winding loss, using high-temperature superconductors in rotating machines. Our goal in presented article is to consider design and analyze a new topology of radial flux permanent magnet motors in which high temperature superconductors have been used, such that superconducting winding has been used instead of cupper winding. So, we can see increasing efficiency, torque and power density in comparison to conventional motor and one of most prominent points in the same article is increasing torque, so that calculations show the torque has been increased up to 42% in comparison to conventional permanent magnet motor, using high temperature superconducting winding.
{"title":"Design and Implementation of a High-Temperature Superconductive Radial-Flux Permanent-magnet motor and comparison study","authors":"Shahrzad Karami, A. Siadatan, A. Hekmati","doi":"10.1109/EPEC.2018.8598325","DOIUrl":"https://doi.org/10.1109/EPEC.2018.8598325","url":null,"abstract":"Generally we can gain high current density and decrease winding loss, using high-temperature superconductors in rotating machines. Our goal in presented article is to consider design and analyze a new topology of radial flux permanent magnet motors in which high temperature superconductors have been used, such that superconducting winding has been used instead of cupper winding. So, we can see increasing efficiency, torque and power density in comparison to conventional motor and one of most prominent points in the same article is increasing torque, so that calculations show the torque has been increased up to 42% in comparison to conventional permanent magnet motor, using high temperature superconducting winding.","PeriodicalId":265297,"journal":{"name":"2018 IEEE Electrical Power and Energy Conference (EPEC)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116295280","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 : 2018-10-01DOI: 10.1109/EPEC.2018.8598292
S. Mousavi, M. Shamei, A. Siadatan, F. Nabizadeh, S. H. Mirimani
In this paper, simulation of three-dimensional power transformer and calculation of the losses will be completely reviewed. In this way, at first, the importance of the survey about transformer losses will be briefly discussed. After that, all of the losses in the transformer will be studied and a brief explanation for each one will be given.so, transformer losses will be calculated by three-dimensional finite element method. Analysis of element method, enable high precision without many conditions. At last, the no load and full load losses of the transformer will finite element method has calculated and the results will provide.
{"title":"Calculation of Power Transformer Losses by Finite Element Method","authors":"S. Mousavi, M. Shamei, A. Siadatan, F. Nabizadeh, S. H. Mirimani","doi":"10.1109/EPEC.2018.8598292","DOIUrl":"https://doi.org/10.1109/EPEC.2018.8598292","url":null,"abstract":"In this paper, simulation of three-dimensional power transformer and calculation of the losses will be completely reviewed. In this way, at first, the importance of the survey about transformer losses will be briefly discussed. After that, all of the losses in the transformer will be studied and a brief explanation for each one will be given.so, transformer losses will be calculated by three-dimensional finite element method. Analysis of element method, enable high precision without many conditions. At last, the no load and full load losses of the transformer will finite element method has calculated and the results will provide.","PeriodicalId":265297,"journal":{"name":"2018 IEEE Electrical Power and Energy Conference (EPEC)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114678981","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 : 2018-10-01DOI: 10.1109/EPEC.2018.8598434
Jigneshkumar Patel, V. Sood
This review paper summarizes the different types of digital controller implementations used for power electronic converter applications. The review covers the use of analog, hybrid to digital structures. Over the period covered, the range of converter models have evolved from simple DC-DC converters to sophisticated multi-level designs to expand the range of applications from low-power (microwatts) to ultra high- power level (MW). The control algorithms themselves have evolved from very simple designs to using complex artificial intelligence techniques requiring a high level of computational burden.
{"title":"Review of Digital Controllers in Power Converters","authors":"Jigneshkumar Patel, V. Sood","doi":"10.1109/EPEC.2018.8598434","DOIUrl":"https://doi.org/10.1109/EPEC.2018.8598434","url":null,"abstract":"This review paper summarizes the different types of digital controller implementations used for power electronic converter applications. The review covers the use of analog, hybrid to digital structures. Over the period covered, the range of converter models have evolved from simple DC-DC converters to sophisticated multi-level designs to expand the range of applications from low-power (microwatts) to ultra high- power level (MW). The control algorithms themselves have evolved from very simple designs to using complex artificial intelligence techniques requiring a high level of computational burden.","PeriodicalId":265297,"journal":{"name":"2018 IEEE Electrical Power and Energy Conference (EPEC)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126634508","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 : 2018-10-01DOI: 10.1109/EPEC.2018.8598413
Mehmet Demir, Atefeh Atty Mashatan, Ozgur Turetken, A. Ferworn
There are various compelling use cases of blockchain technology in the energy and utility sector. We survey the benefits and challenges of blockchain technology on these use cases. Most of these cases focus on the trade of energy. We introduce a novel use case on transparent disaster recovery from service disruptions. We describe the actors on the system, identify trust issues, and show the benefits of using blockchain in this use case. Keywords—blockchain, distributed ledger, utility, energy, disaster relief, service restoration
{"title":"Utility Blockchain for Transparent Disaster Recovery","authors":"Mehmet Demir, Atefeh Atty Mashatan, Ozgur Turetken, A. Ferworn","doi":"10.1109/EPEC.2018.8598413","DOIUrl":"https://doi.org/10.1109/EPEC.2018.8598413","url":null,"abstract":"There are various compelling use cases of blockchain technology in the energy and utility sector. We survey the benefits and challenges of blockchain technology on these use cases. Most of these cases focus on the trade of energy. We introduce a novel use case on transparent disaster recovery from service disruptions. We describe the actors on the system, identify trust issues, and show the benefits of using blockchain in this use case. Keywords—blockchain, distributed ledger, utility, energy, disaster relief, service restoration","PeriodicalId":265297,"journal":{"name":"2018 IEEE Electrical Power and Energy Conference (EPEC)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126902516","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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