Pub Date : 2019-03-01DOI: 10.1109/ICCPEIC45300.2019.9082408
A. Thorat, I. Korachagaon, A. Mulla
Reactive power play an important role in voltage stability and economic activities of power system. To maintain power quality and security, voltage at each bus should be within its acceptable limit. Reactive power is one of the important aspects of active power loss minimization. Optimizing reactive power is a process of minimizing total active power loss by handling all the parameters of generation and transmission network without violating any specified constraints. The complex nonlinear optimization problem can be solved by classical optimization technique and experimental based technique. For handling wide complex network the experiment based techniques gives good results over numerical technique in most of the cases. This paper presents an application of gbest ABC algorithm to solve reactive power optimization problem. gbest guided ABC algorithm uses swarm intelligence techniques. To check the effectiveness and robustness of gbest-guided ABC algorithm it is applied on IEEE 30, IEEE57 and IEEE 118 standard test bus system. To validate results of gbest – guided ABC algorithm for the application of reactive power optimization problem it is compared with existing available literature data. The statistical analysis of gbest guided ABC algorithm is also carried out for IEEE 30, IEEE57 and IEEE 118 standard test bus system.
{"title":"A technique to optimize reactive power using gbest Guided Artificial Bee Colony Algorithm","authors":"A. Thorat, I. Korachagaon, A. Mulla","doi":"10.1109/ICCPEIC45300.2019.9082408","DOIUrl":"https://doi.org/10.1109/ICCPEIC45300.2019.9082408","url":null,"abstract":"Reactive power play an important role in voltage stability and economic activities of power system. To maintain power quality and security, voltage at each bus should be within its acceptable limit. Reactive power is one of the important aspects of active power loss minimization. Optimizing reactive power is a process of minimizing total active power loss by handling all the parameters of generation and transmission network without violating any specified constraints. The complex nonlinear optimization problem can be solved by classical optimization technique and experimental based technique. For handling wide complex network the experiment based techniques gives good results over numerical technique in most of the cases. This paper presents an application of gbest ABC algorithm to solve reactive power optimization problem. gbest guided ABC algorithm uses swarm intelligence techniques. To check the effectiveness and robustness of gbest-guided ABC algorithm it is applied on IEEE 30, IEEE57 and IEEE 118 standard test bus system. To validate results of gbest – guided ABC algorithm for the application of reactive power optimization problem it is compared with existing available literature data. The statistical analysis of gbest guided ABC algorithm is also carried out for IEEE 30, IEEE57 and IEEE 118 standard test bus system.","PeriodicalId":120930,"journal":{"name":"2019 International Conference on Computation of Power, Energy, Information and Communication (ICCPEIC)","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126896298","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 : 2019-03-01DOI: 10.1109/ICCPEIC45300.2019.9082377
Shital Thorat, V. Kalkhambkar
This paper introduces a modem method of utilizing PV solar inverter as static synchronous compensator, for increasing power transfer capability of the interconnected grid. The solar farm generates active power at day time and totally idle at night time The entire PV farm utilizes voltage controller and damping controller for increasing power transfer capacity during the time period. The capacity of inverter left after the active power production at day time which is used to accomplish the above objectives This novel control concept of PV solar farm improves power transfer capacity, therefore other additional flexible AC transmission system controllers or series/shunt capacitors are not required
{"title":"Improvement of Power Transfer Capability of Grid Employing Solar Farm as STATCOM","authors":"Shital Thorat, V. Kalkhambkar","doi":"10.1109/ICCPEIC45300.2019.9082377","DOIUrl":"https://doi.org/10.1109/ICCPEIC45300.2019.9082377","url":null,"abstract":"This paper introduces a modem method of utilizing PV solar inverter as static synchronous compensator, for increasing power transfer capability of the interconnected grid. The solar farm generates active power at day time and totally idle at night time The entire PV farm utilizes voltage controller and damping controller for increasing power transfer capacity during the time period. The capacity of inverter left after the active power production at day time which is used to accomplish the above objectives This novel control concept of PV solar farm improves power transfer capacity, therefore other additional flexible AC transmission system controllers or series/shunt capacitors are not required","PeriodicalId":120930,"journal":{"name":"2019 International Conference on Computation of Power, Energy, Information and Communication (ICCPEIC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129140664","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 : 2019-03-01DOI: 10.1109/ICCPEIC45300.2019.9082379
C. Nayanatara, J. Baskaran, S. Dharani, V. Kaviya Sri, E. Kanmani
Renewable energy resources are abundant in our country. The demand for electricity can be minimized by using the renewable resources rather than using the conventional resources. Thus a well Designed hybrid system able to meet out all the demands of the society. Optimization of hybrid energy system is to select the best combination of the sources for the place near Vellore to get the better efficiency. The most important factor in the optimization is to get the sources in the most cheapest way i.e. cost effectiveness. HOMER is used to estimate the cost of installing and operation of resources over the life time. It also provides the best optimization result with two diesel generator, PV source, converter and battery backup. The performance of each resources are analysed, simulated, optimized and sensitivity cases are performed.
{"title":"Optimization of Hybrid Energy Resources using Homer Software","authors":"C. Nayanatara, J. Baskaran, S. Dharani, V. Kaviya Sri, E. Kanmani","doi":"10.1109/ICCPEIC45300.2019.9082379","DOIUrl":"https://doi.org/10.1109/ICCPEIC45300.2019.9082379","url":null,"abstract":"Renewable energy resources are abundant in our country. The demand for electricity can be minimized by using the renewable resources rather than using the conventional resources. Thus a well Designed hybrid system able to meet out all the demands of the society. Optimization of hybrid energy system is to select the best combination of the sources for the place near Vellore to get the better efficiency. The most important factor in the optimization is to get the sources in the most cheapest way i.e. cost effectiveness. HOMER is used to estimate the cost of installing and operation of resources over the life time. It also provides the best optimization result with two diesel generator, PV source, converter and battery backup. The performance of each resources are analysed, simulated, optimized and sensitivity cases are performed.","PeriodicalId":120930,"journal":{"name":"2019 International Conference on Computation of Power, Energy, Information and Communication (ICCPEIC)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125677787","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 : 2019-03-01DOI: 10.1109/ICCPEIC45300.2019.9082405
A. P. Kumar, G. Sreehari, M. Vijay, A. M. Parimi
This paper investigates a frequency subordinate control of Wind Power Generation (WPG) without any storage device. With the development of power electronics technology in recent decade has given an opportunity to utilize the Renewable Energy Source (RES) based generation to the maximum extent. Among different RES generations, Wind power installation in India has grown exponentially. With the dissemination of wind power generation into the grid is growing progressively and consumption of wind power as a stand-alone source of power generation feeding power to remote locations. A frequency-based demand control technique is investigated consisting of Wind turbine, Permanent Magnet Synchronous Generator, Main Load and Secondary load. The frequency of the stand-alone WPG feeding main load is maintained at a desired level by controlling the power flow to the secondary load. The performance of the control technique is inspected under constant and variable wind speed in MATLAB/ Simulink environment and the simulation results exhibit adequate controller action.
{"title":"A Technical Implementation of Frequency Subordinate Control of WPG","authors":"A. P. Kumar, G. Sreehari, M. Vijay, A. M. Parimi","doi":"10.1109/ICCPEIC45300.2019.9082405","DOIUrl":"https://doi.org/10.1109/ICCPEIC45300.2019.9082405","url":null,"abstract":"This paper investigates a frequency subordinate control of Wind Power Generation (WPG) without any storage device. With the development of power electronics technology in recent decade has given an opportunity to utilize the Renewable Energy Source (RES) based generation to the maximum extent. Among different RES generations, Wind power installation in India has grown exponentially. With the dissemination of wind power generation into the grid is growing progressively and consumption of wind power as a stand-alone source of power generation feeding power to remote locations. A frequency-based demand control technique is investigated consisting of Wind turbine, Permanent Magnet Synchronous Generator, Main Load and Secondary load. The frequency of the stand-alone WPG feeding main load is maintained at a desired level by controlling the power flow to the secondary load. The performance of the control technique is inspected under constant and variable wind speed in MATLAB/ Simulink environment and the simulation results exhibit adequate controller action.","PeriodicalId":120930,"journal":{"name":"2019 International Conference on Computation of Power, Energy, Information and Communication (ICCPEIC)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132827317","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 : 2019-03-01DOI: 10.1109/ICCPEIC45300.2019.9082386
C. Kalaivani, K. Rajambal
Distributed generation system (DG) coupled to utility grid are in need of proper grid synchronization which is one of the most significant issues to be addressed. This study suggests a phase-locked loop (PLL), decoupled double synchronous reference frame (ddsrfPLL) for synchronization of grid connected inverters in unbalanced grid and variable frequency conditions. The concept uses two reference frames to convert the input voltage so as to recognize the positive and negative sequence component simultaneously. A synthesis circuit generating the quadratic and in-phase signals is utilized for decoupling the input voltage. This technique identifies and tracks the frequency and phase angle without distortion compared to synchronous reference frame PLL (dqPLL) even in variable-frequency environment. This paper addresses description and derivation of the both dqPLL and ddsrfPLL method. Its good performance is demonstrated by simulation and comparison results are presented.
{"title":"Grid Integration of Three-phase Inverter using Decoupled Double Synchronus Reference Frame PLL","authors":"C. Kalaivani, K. Rajambal","doi":"10.1109/ICCPEIC45300.2019.9082386","DOIUrl":"https://doi.org/10.1109/ICCPEIC45300.2019.9082386","url":null,"abstract":"Distributed generation system (DG) coupled to utility grid are in need of proper grid synchronization which is one of the most significant issues to be addressed. This study suggests a phase-locked loop (PLL), decoupled double synchronous reference frame (ddsrfPLL) for synchronization of grid connected inverters in unbalanced grid and variable frequency conditions. The concept uses two reference frames to convert the input voltage so as to recognize the positive and negative sequence component simultaneously. A synthesis circuit generating the quadratic and in-phase signals is utilized for decoupling the input voltage. This technique identifies and tracks the frequency and phase angle without distortion compared to synchronous reference frame PLL (dqPLL) even in variable-frequency environment. This paper addresses description and derivation of the both dqPLL and ddsrfPLL method. Its good performance is demonstrated by simulation and comparison results are presented.","PeriodicalId":120930,"journal":{"name":"2019 International Conference on Computation of Power, Energy, Information and Communication (ICCPEIC)","volume":" 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132124235","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 : 2019-03-01DOI: 10.1109/ICCPEIC45300.2019.9082354
D. Raja, G. Ravi
Multi-phase voltage source inverter (VSI) with numerous advantages dominates three-phase VSI and emerges as a potential contender and viable solution for the high power electric drive applications in industries. When multi-phase voltage source inverters (VSIs) are used to drive the induction motor, it requires a suitable switching technique for its control. This paper investigates the performance of $3-varphi$ and $5 varphi$ induction motor drive with time modulated switching technique. First, a $3-varphi$ and $5-varphi$ VSI model is compared with different open fault conditions to show the fault tolerant capability of $5-varphi$ induction motor drive. Next, time modulated switching technique (Kim-sul Algorithm) is designed for $5-varphi$ VSI fed induction motor drive for an efficient control. The proposed scheme is simple and equivalent to space vector modulation technique. The performances of the $5-varphi$ VSI fed IM drive is tested with this switching technique, and the results observed in terms of harmonic contents present in the output voltage waveform. MATLAB/Simulink software results included in this paper to show and verify the theoretical concepts.
{"title":"Design of Five Phase Voltage Source Inverter with Time Modulated Switching Technique for Induction Motor Drive","authors":"D. Raja, G. Ravi","doi":"10.1109/ICCPEIC45300.2019.9082354","DOIUrl":"https://doi.org/10.1109/ICCPEIC45300.2019.9082354","url":null,"abstract":"Multi-phase voltage source inverter (VSI) with numerous advantages dominates three-phase VSI and emerges as a potential contender and viable solution for the high power electric drive applications in industries. When multi-phase voltage source inverters (VSIs) are used to drive the induction motor, it requires a suitable switching technique for its control. This paper investigates the performance of $3-varphi$ and $5 varphi$ induction motor drive with time modulated switching technique. First, a $3-varphi$ and $5-varphi$ VSI model is compared with different open fault conditions to show the fault tolerant capability of $5-varphi$ induction motor drive. Next, time modulated switching technique (Kim-sul Algorithm) is designed for $5-varphi$ VSI fed induction motor drive for an efficient control. The proposed scheme is simple and equivalent to space vector modulation technique. The performances of the $5-varphi$ VSI fed IM drive is tested with this switching technique, and the results observed in terms of harmonic contents present in the output voltage waveform. MATLAB/Simulink software results included in this paper to show and verify the theoretical concepts.","PeriodicalId":120930,"journal":{"name":"2019 International Conference on Computation of Power, Energy, Information and Communication (ICCPEIC)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131482595","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 : 2019-03-01DOI: 10.1109/ICCPEIC45300.2019.9082344
S. Kamalsakthi, J. Baskaran, S. A. Elankurisil
This study present a three phase grid fed photovoltaic system based on a maximum power point tracking, which act as the maximum particle swarm optimization. The solar system fed to the grid needs additional conditions to get from a large quality electric system. The work introduces connection of three phase fed solar system. Therefore the boost converter system with maximum power point (MPSO,MPPT) is applied to utilize the maximum power get from the solar and modify them to the utility grid. A complete simulation and installation of a three phase grid-fed inverter are modelled to analyse the proposed novel controller for the utility grid connected solar PV system.
{"title":"Optimization of Grid Connected PV System by Partial Shading Mppt Using Modified PSO Algorithm","authors":"S. Kamalsakthi, J. Baskaran, S. A. Elankurisil","doi":"10.1109/ICCPEIC45300.2019.9082344","DOIUrl":"https://doi.org/10.1109/ICCPEIC45300.2019.9082344","url":null,"abstract":"This study present a three phase grid fed photovoltaic system based on a maximum power point tracking, which act as the maximum particle swarm optimization. The solar system fed to the grid needs additional conditions to get from a large quality electric system. The work introduces connection of three phase fed solar system. Therefore the boost converter system with maximum power point (MPSO,MPPT) is applied to utilize the maximum power get from the solar and modify them to the utility grid. A complete simulation and installation of a three phase grid-fed inverter are modelled to analyse the proposed novel controller for the utility grid connected solar PV system.","PeriodicalId":120930,"journal":{"name":"2019 International Conference on Computation of Power, Energy, Information and Communication (ICCPEIC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130896430","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 : 2019-03-01DOI: 10.1109/ICCPEIC45300.2019.9082396
K. V. Ramana Reddy, K. Ravi
This paper gives the Performance Analysis and Mitigation of Power Quality Issues with Hybrid B–STATCOM in 140 Bus Distribution System Connected To SCIG Wind Turbine. It is an important task to maintain the power quality within the system operating limits and facilities in a distributed power grid. In the developed 140 bus system a hybrid battery energy storage system and STATCOM (BSTATCOM) with hysteresis current control strategy is proposed for an inverter to improve power quality with an exchange of current and voltage simultaneously. The operation mode switches a flawless transfer of the operation mode from grid-connected to stand-alone or vice versa. The outside of an islanded bus voltage loop and inside B – STATCOM inverter current loop, controllers are designed using h current control strategy with three phase and four wire system. The injected currents are clean, balanced and free from harmonics. The islanded bus relives from the main power supply and the demand of reactive power supplied from the squirrel cage induction generator and B – STATCOM follows the rules of grid operation as per IEC 61400 – 21. The control scheme of 140 bus distribution power grid connected SCIG wind energy system verified using simulation MATLAB/ SIMULINK power system block sets.
{"title":"Performance Analysis And Mitigation Of Power Quality Issues With Hybrid B – Statcom In 140 Bus Distribution System Connected To Scig Wind Turbine","authors":"K. V. Ramana Reddy, K. Ravi","doi":"10.1109/ICCPEIC45300.2019.9082396","DOIUrl":"https://doi.org/10.1109/ICCPEIC45300.2019.9082396","url":null,"abstract":"This paper gives the Performance Analysis and Mitigation of Power Quality Issues with Hybrid B–STATCOM in 140 Bus Distribution System Connected To SCIG Wind Turbine. It is an important task to maintain the power quality within the system operating limits and facilities in a distributed power grid. In the developed 140 bus system a hybrid battery energy storage system and STATCOM (BSTATCOM) with hysteresis current control strategy is proposed for an inverter to improve power quality with an exchange of current and voltage simultaneously. The operation mode switches a flawless transfer of the operation mode from grid-connected to stand-alone or vice versa. The outside of an islanded bus voltage loop and inside B – STATCOM inverter current loop, controllers are designed using h current control strategy with three phase and four wire system. The injected currents are clean, balanced and free from harmonics. The islanded bus relives from the main power supply and the demand of reactive power supplied from the squirrel cage induction generator and B – STATCOM follows the rules of grid operation as per IEC 61400 – 21. The control scheme of 140 bus distribution power grid connected SCIG wind energy system verified using simulation MATLAB/ SIMULINK power system block sets.","PeriodicalId":120930,"journal":{"name":"2019 International Conference on Computation of Power, Energy, Information and Communication (ICCPEIC)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130740690","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 : 2019-03-01DOI: 10.1109/ICCPEIC45300.2019.9082397
B. Jaya Deepthi, J. Ramesh, P. Chandra Babu Naidu
Currently energy theft has become a major problem in the developing countries like India, Pakistan, Srilanka, etc. The economic status of the country will be disturbed in a great manner if the electricity is illegally used. It is very difficult to verify theft occurred and solve it at individual level in the real time applications. Various kinds of energy theft comprised of meter tampering, bypassing the energy meter, direct hooking from line, etc. This paper proposes the detection of energy theft using Arduino and GSM module. LCD is provided to display the data of power usage and also the power being theft i.e., the difference between the consumers load and the theft load which is sent to the GSM module. Further this information is sent to the electricity board and also to the consumer as a message which embodies the distribution transformer details. The power is fed from the transformer to the Arduino which is being stepped down. The major advantage of this paper is when compared to the existing system, it detects the power theft and sends the information of the corresponding feeder using GSM module to electricity board directly without manually filing a complaint and also in case of power failure, the message is sent without any interruption as Arduino is facilitated with power backup.
{"title":"Detection of Electricity Theft in the Distribution System using Arduino and GSM","authors":"B. Jaya Deepthi, J. Ramesh, P. Chandra Babu Naidu","doi":"10.1109/ICCPEIC45300.2019.9082397","DOIUrl":"https://doi.org/10.1109/ICCPEIC45300.2019.9082397","url":null,"abstract":"Currently energy theft has become a major problem in the developing countries like India, Pakistan, Srilanka, etc. The economic status of the country will be disturbed in a great manner if the electricity is illegally used. It is very difficult to verify theft occurred and solve it at individual level in the real time applications. Various kinds of energy theft comprised of meter tampering, bypassing the energy meter, direct hooking from line, etc. This paper proposes the detection of energy theft using Arduino and GSM module. LCD is provided to display the data of power usage and also the power being theft i.e., the difference between the consumers load and the theft load which is sent to the GSM module. Further this information is sent to the electricity board and also to the consumer as a message which embodies the distribution transformer details. The power is fed from the transformer to the Arduino which is being stepped down. The major advantage of this paper is when compared to the existing system, it detects the power theft and sends the information of the corresponding feeder using GSM module to electricity board directly without manually filing a complaint and also in case of power failure, the message is sent without any interruption as Arduino is facilitated with power backup.","PeriodicalId":120930,"journal":{"name":"2019 International Conference on Computation of Power, Energy, Information and Communication (ICCPEIC)","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121162739","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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