Pub Date : 2010-11-01DOI: 10.1109/IAS.2010.5615346
N. Grass, Michael Steingraeber, Roland Metz
The system performance of electrostatic precipitator systems depends heavily on the type and properties of the high voltage power supply. Switched mode type power supplies like IGBT inverters have been proven very beneficial for that purpose during the last decade in many applications. It has even been possible to increase the electrical power significantly, in many applications a factor of 2 can be achieved, which leads to a significant improvement of the dust collection performance. Additionally, the energy efficiency of the precipitation process becomes more important. With the switched mode power supply technology both, collection, and energy efficiency can be improved. Unfortunately, it is very difficult and unreliable to estimate the potential of improvement in advance of the equipment modernization. There are a high number of relevant process variables and uncertainties which cause the theoretical results to being unreliable. Therefore, the practical and reliable determination of the possible improvements requires a trial installation of the entire high voltage power supply equipment on site and accurate analysis of the measured data. The proposed solution suggests a mobile self contained trial unit, which can be connected easily to any existing electrostatic precipitator installations to run the tests and prove efficiencies in a real environment
{"title":"A New Mobile IGBT Inverter HV Test System for ESPs","authors":"N. Grass, Michael Steingraeber, Roland Metz","doi":"10.1109/IAS.2010.5615346","DOIUrl":"https://doi.org/10.1109/IAS.2010.5615346","url":null,"abstract":"The system performance of electrostatic precipitator systems depends heavily on the type and properties of the high voltage power supply. Switched mode type power supplies like IGBT inverters have been proven very beneficial for that purpose during the last decade in many applications. It has even been possible to increase the electrical power significantly, in many applications a factor of 2 can be achieved, which leads to a significant improvement of the dust collection performance. Additionally, the energy efficiency of the precipitation process becomes more important. With the switched mode power supply technology both, collection, and energy efficiency can be improved. Unfortunately, it is very difficult and unreliable to estimate the potential of improvement in advance of the equipment modernization. There are a high number of relevant process variables and uncertainties which cause the theoretical results to being unreliable. Therefore, the practical and reliable determination of the possible improvements requires a trial installation of the entire high voltage power supply equipment on site and accurate analysis of the measured data. The proposed solution suggests a mobile self contained trial unit, which can be connected easily to any existing electrostatic precipitator installations to run the tests and prove efficiencies in a real environment","PeriodicalId":317643,"journal":{"name":"2010 IEEE Industry Applications Society Annual Meeting","volume":" 88","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120933604","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 : 2010-11-01DOI: 10.1109/IAS.2010.5614509
C. Dragan, O. Fati, M. Radu, L. Calin, A. Samuila, L. Dascalescu
The output of any electrostatic separation process is strongly dependent on the effectiveness of particle charging. The aim of the present paper is to evaluate the effects of several factors that might influence the efficiency of a fluidized bed tribocharger, in the presence of an electric field orthogonally oriented to the direction of the fluidization air. The experiments were carried out on several synthetic mixtures of binary granular mixtures. The velocity of the fluidization air, the duration of the tribocharging process, and the composition of the mixture were the three process variables investigated. Whenever possible, the effects of these variables on the output of the process (i.e. the mass and the charge of the granules collected at the electrodes), were evaluated using the experimental design methodology. The results of full- and composite-factorial experimental designs were analyzed with a commercial software (MODDE 5.0, Umetrics). The effectiveness of the charging process was found to depend significantly on each of these factors. The propitious aerodynamic design of the device is a prerequisite for the successful industry application of the technique.
{"title":"Tribocharging of Mixed Granular Plastics in a Fluidized-Bed Device","authors":"C. Dragan, O. Fati, M. Radu, L. Calin, A. Samuila, L. Dascalescu","doi":"10.1109/IAS.2010.5614509","DOIUrl":"https://doi.org/10.1109/IAS.2010.5614509","url":null,"abstract":"The output of any electrostatic separation process is strongly dependent on the effectiveness of particle charging. The aim of the present paper is to evaluate the effects of several factors that might influence the efficiency of a fluidized bed tribocharger, in the presence of an electric field orthogonally oriented to the direction of the fluidization air. The experiments were carried out on several synthetic mixtures of binary granular mixtures. The velocity of the fluidization air, the duration of the tribocharging process, and the composition of the mixture were the three process variables investigated. Whenever possible, the effects of these variables on the output of the process (i.e. the mass and the charge of the granules collected at the electrodes), were evaluated using the experimental design methodology. The results of full- and composite-factorial experimental designs were analyzed with a commercial software (MODDE 5.0, Umetrics). The effectiveness of the charging process was found to depend significantly on each of these factors. The propitious aerodynamic design of the device is a prerequisite for the successful industry application of the technique.","PeriodicalId":317643,"journal":{"name":"2010 IEEE Industry Applications Society Annual Meeting","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130164905","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 : 2010-11-01DOI: 10.1109/IAS.2010.5615382
D. Paire, Marcelo Simoes, J. Lagorse, A. Miraoui
The paper deals with a control strategy to manage the energy in a hybrid system. Storage elements such as batteries, supercapacitors, load, grid and renewable sources are connected through power converters and a dc-link. The dc-bus voltage control is shared with the different sources in order to respect the behavior of each element and to improve the performance of renewable energy usage. Experminental results corroborate the proposed energy management system control.
{"title":"A Real-Time Sharing Reference Voltage for Hybrid Generation Power System","authors":"D. Paire, Marcelo Simoes, J. Lagorse, A. Miraoui","doi":"10.1109/IAS.2010.5615382","DOIUrl":"https://doi.org/10.1109/IAS.2010.5615382","url":null,"abstract":"The paper deals with a control strategy to manage the energy in a hybrid system. Storage elements such as batteries, supercapacitors, load, grid and renewable sources are connected through power converters and a dc-link. The dc-bus voltage control is shared with the different sources in order to respect the behavior of each element and to improve the performance of renewable energy usage. Experminental results corroborate the proposed energy management system control.","PeriodicalId":317643,"journal":{"name":"2010 IEEE Industry Applications Society Annual Meeting","volume":"53 12","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114037056","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 : 2010-11-01DOI: 10.1109/IAS.2010.5616912
Jill R. Smith, P. K. Sen
Corrosive sulfur in transformer oil has been identified to cause sudden and unexpected failures of several transformers in recent years. It has been decades since corrosive sulfur has caused such problems. This paper discusses the problems caused by corrosive sulfur, why the problem has resurfaced, new test methods developed to detect corrosive sulfur, and remedies suggested to prevent further destruction.
{"title":"Corrosive Sulfur in Transformer Oil","authors":"Jill R. Smith, P. K. Sen","doi":"10.1109/IAS.2010.5616912","DOIUrl":"https://doi.org/10.1109/IAS.2010.5616912","url":null,"abstract":"Corrosive sulfur in transformer oil has been identified to cause sudden and unexpected failures of several transformers in recent years. It has been decades since corrosive sulfur has caused such problems. This paper discusses the problems caused by corrosive sulfur, why the problem has resurfaced, new test methods developed to detect corrosive sulfur, and remedies suggested to prevent further destruction.","PeriodicalId":317643,"journal":{"name":"2010 IEEE Industry Applications Society Annual Meeting","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122523809","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 : 2010-11-01DOI: 10.1109/IAS.2010.5616813
Su Sheng, H. Feng, D. Shi, X. Duan
Grasping system dynamic information is helpful for dispatcher in control center to take correct control action in time under emergency condition. Wide Area Measurement Systems (WAMS) has been viewed as an ideal system to monitor power systems since it can provide comprehensive profile and dynamic behavior of the power systems. Whereas, for its demanding request on communication systems, it might not operate when part of communication systems fails. Therefore, it is highly preferred to facilitate Supervisory Control and Data Acquisition (SCADA) with the capability to transmit power system dynamics as an alternation. Based on the development of substation automation system, a novel approach is proposed to transmit system dynamics in existing SCADA using data compression. Uniform sampling based data compression and interpolation based reconstruction are utilized to reduce data volume and mitigate restriction of communication capacity. The system dynamics is compressed in Remote Terminal Units (RTUs) so that a few samplings could contain system dynamics information. The sampled data could be used to reconstruct dynamics information by interpolation. Simulation on a 36 nodes system shows feasibility of the proposed approach.
{"title":"Transmitting Power System Dynamics in Existing SCADA Using Sampling/Interpolation Based Data Compression","authors":"Su Sheng, H. Feng, D. Shi, X. Duan","doi":"10.1109/IAS.2010.5616813","DOIUrl":"https://doi.org/10.1109/IAS.2010.5616813","url":null,"abstract":"Grasping system dynamic information is helpful for dispatcher in control center to take correct control action in time under emergency condition. Wide Area Measurement Systems (WAMS) has been viewed as an ideal system to monitor power systems since it can provide comprehensive profile and dynamic behavior of the power systems. Whereas, for its demanding request on communication systems, it might not operate when part of communication systems fails. Therefore, it is highly preferred to facilitate Supervisory Control and Data Acquisition (SCADA) with the capability to transmit power system dynamics as an alternation. Based on the development of substation automation system, a novel approach is proposed to transmit system dynamics in existing SCADA using data compression. Uniform sampling based data compression and interpolation based reconstruction are utilized to reduce data volume and mitigate restriction of communication capacity. The system dynamics is compressed in Remote Terminal Units (RTUs) so that a few samplings could contain system dynamics information. The sampled data could be used to reconstruct dynamics information by interpolation. Simulation on a 36 nodes system shows feasibility of the proposed approach.","PeriodicalId":317643,"journal":{"name":"2010 IEEE Industry Applications Society Annual Meeting","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128614844","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 : 2010-11-01DOI: 10.1109/IAS.2010.5615418
Y. Nakagawa, H. Fujisawa, R. Ono, T. Oda
Plasma application for environmental improvement is desirable and it is worthwhile to clarify the effect of humidity on the plasma process. We investigated humidity effect by both approaches of the radical temperature measurement by LIF and practical decomposition experiment. As humidity increases, The OH rotational temperature rises quickly and reaches high. As well-known, ozone generation is suppressed by addition of water vapor. TCE decomposition efficiency increases with humidity rising up to 20%, while the efficiency decreases when humidity exceeds 20%. We compared the experimental results with chemical reaction simulation, finding that temperature shift with humidity leads to similar pattern of efficiency variation.
{"title":"Dilute Trichloroethylene Decomposition by using High Pressure Non-Thermal Plasma: Humidity Effects","authors":"Y. Nakagawa, H. Fujisawa, R. Ono, T. Oda","doi":"10.1109/IAS.2010.5615418","DOIUrl":"https://doi.org/10.1109/IAS.2010.5615418","url":null,"abstract":"Plasma application for environmental improvement is desirable and it is worthwhile to clarify the effect of humidity on the plasma process. We investigated humidity effect by both approaches of the radical temperature measurement by LIF and practical decomposition experiment. As humidity increases, The OH rotational temperature rises quickly and reaches high. As well-known, ozone generation is suppressed by addition of water vapor. TCE decomposition efficiency increases with humidity rising up to 20%, while the efficiency decreases when humidity exceeds 20%. We compared the experimental results with chemical reaction simulation, finding that temperature shift with humidity leads to similar pattern of efficiency variation.","PeriodicalId":317643,"journal":{"name":"2010 IEEE Industry Applications Society Annual Meeting","volume":"162 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115243338","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 : 2010-11-01DOI: 10.1109/IAS.2010.5615176
P. Sattari, G. Castle, K. Adamiak
In this paper a new two-dimensional model is presented for numerical simulation of Trichel pulses in a point-plane configuration. Both radial and axial components of the electric field are considered and it is assumed that three ionic species exist in the air gap: electrons, and positive and negative oxygen ions. The Poisson equation is solved for electric field calculations and three continuity equations are solved for modeling the transport of charge densities in the air gap. The finite element method (FEM) is used for solving the Poisson equation and a combined Flux Corrected Transport-FEM is used for the charge transport equations. Trichel pulses for different applied voltages are shown and the characteristics of these pulses at different voltages are compared with experimental results reported in the literature. The time variation of the electric field on the corona electrode at different stages of one Trichel pulse is also presented. Moreover, the distributions of electron, positive ion and negative ion densities at different stages of the Trichel pulse are discussed.
{"title":"FEM-FCT Based 2D Simulation of Trichel Pulses in Air","authors":"P. Sattari, G. Castle, K. Adamiak","doi":"10.1109/IAS.2010.5615176","DOIUrl":"https://doi.org/10.1109/IAS.2010.5615176","url":null,"abstract":"In this paper a new two-dimensional model is presented for numerical simulation of Trichel pulses in a point-plane configuration. Both radial and axial components of the electric field are considered and it is assumed that three ionic species exist in the air gap: electrons, and positive and negative oxygen ions. The Poisson equation is solved for electric field calculations and three continuity equations are solved for modeling the transport of charge densities in the air gap. The finite element method (FEM) is used for solving the Poisson equation and a combined Flux Corrected Transport-FEM is used for the charge transport equations. Trichel pulses for different applied voltages are shown and the characteristics of these pulses at different voltages are compared with experimental results reported in the literature. The time variation of the electric field on the corona electrode at different stages of one Trichel pulse is also presented. Moreover, the distributions of electron, positive ion and negative ion densities at different stages of the Trichel pulse are discussed.","PeriodicalId":317643,"journal":{"name":"2010 IEEE Industry Applications Society Annual Meeting","volume":"270 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116249032","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 : 2010-11-01DOI: 10.1109/IAS.2010.5614614
S. Murthy, G. Bhuvaneswari, R. Ahuja, Sarsing Gao
The steady state analysis of self excited induction generator (SEIG) is vital for proper implementation of induction machine operation as a generator in a stand alone mode through appropriate modeling. This paper presents a user friendly software based solution for complete evaluation of steady-state behavior of SEIG and a design tool to estimate the capacitance requirement under different operating conditions. It can also predict the performance of SEIG with different types of prime movers such as oil / bio engines, wind and small hydro turbines. The mathematical modeling of the machine is carried out and then simulated in MATLAB's Graphical User Interface (GUI) environment and active windows are created with these models. As a basis for developing an attractive and easy to use design tool, some of MATLAB's GUI operations are implemented in creating an active link with these models. The simulation results obtained through the presented methodology are validated through relevant experimental verification.
{"title":"A Novel MATLAB Graphical User Interface Based Methodology for Analysis, Design and Capacitor Estimation of Self Excited Induction Generators","authors":"S. Murthy, G. Bhuvaneswari, R. Ahuja, Sarsing Gao","doi":"10.1109/IAS.2010.5614614","DOIUrl":"https://doi.org/10.1109/IAS.2010.5614614","url":null,"abstract":"The steady state analysis of self excited induction generator (SEIG) is vital for proper implementation of induction machine operation as a generator in a stand alone mode through appropriate modeling. This paper presents a user friendly software based solution for complete evaluation of steady-state behavior of SEIG and a design tool to estimate the capacitance requirement under different operating conditions. It can also predict the performance of SEIG with different types of prime movers such as oil / bio engines, wind and small hydro turbines. The mathematical modeling of the machine is carried out and then simulated in MATLAB's Graphical User Interface (GUI) environment and active windows are created with these models. As a basis for developing an attractive and easy to use design tool, some of MATLAB's GUI operations are implemented in creating an active link with these models. The simulation results obtained through the presented methodology are validated through relevant experimental verification.","PeriodicalId":317643,"journal":{"name":"2010 IEEE Industry Applications Society Annual Meeting","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114234645","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 : 2010-11-01DOI: 10.1109/IAS.2010.5615966
Himanshu Jain, S. Korkua, Weijen Lee, C. Kwan
Rotor imbalance in induction machines has been widely studied. The signatures to look for in the stator current for detecting rotor imbalance are well established. However, an accurate explanation for the appearance of these signatures is lacking. Moreover, in most studies only a single phase of stator current has been used for detecting rotor imbalance and determining its severity. Combing imbalance features from the three phases through sensor fusion can yield more accurate and reliable results. Therefore, this paper focuses on, (i) accurate modeling of rotor imbalance to explain the genesis of its signatures in the stator current and, (ii) determining imbalance severity by sensor fusion. A test bed is established to verify the proposed approach.
{"title":"Detection and Severity Classification of Rotor Imbalance Faults in Induction Machines","authors":"Himanshu Jain, S. Korkua, Weijen Lee, C. Kwan","doi":"10.1109/IAS.2010.5615966","DOIUrl":"https://doi.org/10.1109/IAS.2010.5615966","url":null,"abstract":"Rotor imbalance in induction machines has been widely studied. The signatures to look for in the stator current for detecting rotor imbalance are well established. However, an accurate explanation for the appearance of these signatures is lacking. Moreover, in most studies only a single phase of stator current has been used for detecting rotor imbalance and determining its severity. Combing imbalance features from the three phases through sensor fusion can yield more accurate and reliable results. Therefore, this paper focuses on, (i) accurate modeling of rotor imbalance to explain the genesis of its signatures in the stator current and, (ii) determining imbalance severity by sensor fusion. A test bed is established to verify the proposed approach.","PeriodicalId":317643,"journal":{"name":"2010 IEEE Industry Applications Society Annual Meeting","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114611716","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 : 2010-11-01DOI: 10.1109/IAS.2010.5614512
A. Antoniu, L. Dascalescu, I. Vacar, M. Plopeanu, B. Tabti, H. Teodorescu
Surface potential and electric field measurement techniques are widely used for the investigation of the corona charging of dielectric surfaces in a wide range of industry applications. The aim of the present paper is to estimate which of these techniques are the most appropriate for characterizing the charging state of non-woven fibrous dielectrics, and point out the "noise factors" that might distort the results of the measurements. The experiments were performed on samples of non-woven poly-propylene (PP) sheets, in contact with or at a well-defined distance from a grounded plane. The effect of the variability of the position of the probes with respect to the samples was also investigated. Several recommendations have been formulated regarding the use of these techniques for monitoring the charging state of non-woven fabrics in industry applications.
{"title":"Surface Potential vs. Electric Field Measurements as Means to Characterize the Charging State of Non-Woven Fabrics","authors":"A. Antoniu, L. Dascalescu, I. Vacar, M. Plopeanu, B. Tabti, H. Teodorescu","doi":"10.1109/IAS.2010.5614512","DOIUrl":"https://doi.org/10.1109/IAS.2010.5614512","url":null,"abstract":"Surface potential and electric field measurement techniques are widely used for the investigation of the corona charging of dielectric surfaces in a wide range of industry applications. The aim of the present paper is to estimate which of these techniques are the most appropriate for characterizing the charging state of non-woven fibrous dielectrics, and point out the \"noise factors\" that might distort the results of the measurements. The experiments were performed on samples of non-woven poly-propylene (PP) sheets, in contact with or at a well-defined distance from a grounded plane. The effect of the variability of the position of the probes with respect to the samples was also investigated. Several recommendations have been formulated regarding the use of these techniques for monitoring the charging state of non-woven fabrics in industry applications.","PeriodicalId":317643,"journal":{"name":"2010 IEEE Industry Applications Society Annual Meeting","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127592022","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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