Pub Date : 2016-07-01DOI: 10.1109/CCSSE.2016.7784361
Song M. Jiao
With the development of power industry, ultra-supercritical unit becomes main thermal power-generate unit. If we grasp the characteristics of the unit's coordinated control system, control quality of the whole system can be improved. Furthermore, the economy and safety of power generation can be increased. Firefly algorithm is an excellent optimization algorithm and is suitable for modeling. But there exist some problems in its application such as local extreme and low optimization precision. Be aimed at these problems, random search and some new variable coefficient strategy are designed to improve original algorithm. Simulation results show that the improved firefly algorithm has better performance in optimization precision, convergence speed and ability of eliminating local extreme. The improve algorithm is used to set up a three-input-three-output coupled coordinated control system's mathematic model. Results showed that these models have excellent similarity with actual objects.
{"title":"Coordinated control system modeling of supercritical unit based on improved firefly algorithm","authors":"Song M. Jiao","doi":"10.1109/CCSSE.2016.7784361","DOIUrl":"https://doi.org/10.1109/CCSSE.2016.7784361","url":null,"abstract":"With the development of power industry, ultra-supercritical unit becomes main thermal power-generate unit. If we grasp the characteristics of the unit's coordinated control system, control quality of the whole system can be improved. Furthermore, the economy and safety of power generation can be increased. Firefly algorithm is an excellent optimization algorithm and is suitable for modeling. But there exist some problems in its application such as local extreme and low optimization precision. Be aimed at these problems, random search and some new variable coefficient strategy are designed to improve original algorithm. Simulation results show that the improved firefly algorithm has better performance in optimization precision, convergence speed and ability of eliminating local extreme. The improve algorithm is used to set up a three-input-three-output coupled coordinated control system's mathematic model. Results showed that these models have excellent similarity with actual objects.","PeriodicalId":136809,"journal":{"name":"2016 2nd International Conference on Control Science and Systems Engineering (ICCSSE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124246325","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 : 2016-07-01DOI: 10.1109/CCSSE.2016.7784366
X. Gong, Haobin Jiang, G. Geng, Bin Tang
The structure and principle of permanent magnet slip clutch (PMSC) which was the important component of P-ECHPS was introduced, and the speed adjustment model of PMSC was set up too. PMSC output speed what is equivalent to steering pump speed should have the performance with great response agility and it has many uncertainties in the process of steering for heavy-duty vehicles. To tackle these problems, nonsingular terminal sliding mode (NTSM) control strategy combined with adaptive control was adopted. The simulation results indicate that adaptive NTSM control strategy is highly effective and accurate, and it has better anti-interference ability. The tracking performance of adaptive NTSM is greater than sliding mode control (SMC) and PID control, and the convergence rate increased by 48% than SMC.
{"title":"Adaptive nonsingular terminal sliding mode control strategy for PMSC","authors":"X. Gong, Haobin Jiang, G. Geng, Bin Tang","doi":"10.1109/CCSSE.2016.7784366","DOIUrl":"https://doi.org/10.1109/CCSSE.2016.7784366","url":null,"abstract":"The structure and principle of permanent magnet slip clutch (PMSC) which was the important component of P-ECHPS was introduced, and the speed adjustment model of PMSC was set up too. PMSC output speed what is equivalent to steering pump speed should have the performance with great response agility and it has many uncertainties in the process of steering for heavy-duty vehicles. To tackle these problems, nonsingular terminal sliding mode (NTSM) control strategy combined with adaptive control was adopted. The simulation results indicate that adaptive NTSM control strategy is highly effective and accurate, and it has better anti-interference ability. The tracking performance of adaptive NTSM is greater than sliding mode control (SMC) and PID control, and the convergence rate increased by 48% than SMC.","PeriodicalId":136809,"journal":{"name":"2016 2nd International Conference on Control Science and Systems Engineering (ICCSSE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131740913","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 : 2016-07-01DOI: 10.1109/CCSSE.2016.7784385
Yifang Liu, Renfu Li, Shuquan Wang
An orbital three-player differential game among Target spacecraft, Pursuer spacecraft and Evader spacecraft is studied in this work. It is assumed that Target spacecraft runs in its orbit without the ability of maneuver, while Pursuer spacecraft and Evader spacecraft have continuous maneuverability. There are opposing objectives between Pursuer spacecraft and Evader spacecraft. The objective of Pursuer spacecraft is to keep Evader spacecraft far away from Target spacecraft while Evader spacecraft tries its best to shorten the distance from it to Target spacecraft prior to being intercepted. The orbital three-player differential game terminates when Evader spacecraft performs successful interception of Target spacecraft or it is intercepted by Pursuer spacecraft. The semi-direct collocation with nonlinear programming incorporated with NSGA-II algorithm which provides the initial guess is employed to solve the current three-player differential game. Numerical simulation was provided to verify the availability of the algorithm in finding the optimal solution of the orbital three-player differential game presented in this paper, and the results show that this work will be useful to some practical applications.
{"title":"Orbital three-player differential game using semi-direct collocation with nonlinear programming","authors":"Yifang Liu, Renfu Li, Shuquan Wang","doi":"10.1109/CCSSE.2016.7784385","DOIUrl":"https://doi.org/10.1109/CCSSE.2016.7784385","url":null,"abstract":"An orbital three-player differential game among Target spacecraft, Pursuer spacecraft and Evader spacecraft is studied in this work. It is assumed that Target spacecraft runs in its orbit without the ability of maneuver, while Pursuer spacecraft and Evader spacecraft have continuous maneuverability. There are opposing objectives between Pursuer spacecraft and Evader spacecraft. The objective of Pursuer spacecraft is to keep Evader spacecraft far away from Target spacecraft while Evader spacecraft tries its best to shorten the distance from it to Target spacecraft prior to being intercepted. The orbital three-player differential game terminates when Evader spacecraft performs successful interception of Target spacecraft or it is intercepted by Pursuer spacecraft. The semi-direct collocation with nonlinear programming incorporated with NSGA-II algorithm which provides the initial guess is employed to solve the current three-player differential game. Numerical simulation was provided to verify the availability of the algorithm in finding the optimal solution of the orbital three-player differential game presented in this paper, and the results show that this work will be useful to some practical applications.","PeriodicalId":136809,"journal":{"name":"2016 2nd International Conference on Control Science and Systems Engineering (ICCSSE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123746742","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 : 2016-07-01DOI: 10.1109/CCSSE.2016.7784387
G. Song, Yiwen Zhao, Jianda Han, Zheng Wang, Huibin Du
Vertebral pedicle screw placement is an important part of spine surgery, surgreons hand screw placement turnover rate was higher. With the development of surgical robot and the robot navigation technology, robot surgery applied in surgery became reality. Currently, the main purpose of surgical robot is assisting the doctor to establish trajectory of pedicle screw. These could not exert the high performance of robot on precision and speedy. Compared to conventional industrial robots, the complexity and uncertainty in the surgical environment and security needs of surgery will restrict the robot to complete the operation automatically. This paper establishes velocity field in operative space, completed the simulation and experimental of surgical robot automatic inserting pedicle screw. The simulation results show the velocity field of the control algorithm advantages of minimally invasive spine surgery procedure that can guarantee the integrity of the contour under disturbance conditions and to avoid damage to the nerve root.
{"title":"Minimally invasive spinal surgical robot velocity control method","authors":"G. Song, Yiwen Zhao, Jianda Han, Zheng Wang, Huibin Du","doi":"10.1109/CCSSE.2016.7784387","DOIUrl":"https://doi.org/10.1109/CCSSE.2016.7784387","url":null,"abstract":"Vertebral pedicle screw placement is an important part of spine surgery, surgreons hand screw placement turnover rate was higher. With the development of surgical robot and the robot navigation technology, robot surgery applied in surgery became reality. Currently, the main purpose of surgical robot is assisting the doctor to establish trajectory of pedicle screw. These could not exert the high performance of robot on precision and speedy. Compared to conventional industrial robots, the complexity and uncertainty in the surgical environment and security needs of surgery will restrict the robot to complete the operation automatically. This paper establishes velocity field in operative space, completed the simulation and experimental of surgical robot automatic inserting pedicle screw. The simulation results show the velocity field of the control algorithm advantages of minimally invasive spine surgery procedure that can guarantee the integrity of the contour under disturbance conditions and to avoid damage to the nerve root.","PeriodicalId":136809,"journal":{"name":"2016 2nd International Conference on Control Science and Systems Engineering (ICCSSE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116688056","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 : 2016-07-01DOI: 10.1109/CCSSE.2016.7784378
K. Jintamuttha, B. Watanapa, Nipon Charoenkitkarn
Nowadays, traffic congestion is a crucial issue for many urban or even suburban areas. A potential but manageable cause of this effect is the inefficient control of traffic light timing cycle that is not proactively respond to the characteristics of the considering intersection and time-dependent condition of the traffic. In this paper, we propose a finite-interval model that finds effective green time for each of the four phases light timing in each cycle. The objective is to acquire satisficing solution, by means of Bat algorithm (BA) to minimize spoilage time at an intersection. The effectiveness of model was validated using a simulation experiment on a crowded intersection in Bangkok that has imbalanced numbers of accommodated lanes and formless urbanism. The traffic condition is simulated by the microscopic traffic simulator called `Simulation of Urban Mobility' (SUMO). The experimental result confirmed the effective improvement when compared with the traditional fix-time operational control.
{"title":"Dynamic traffic light timing optimization model using bat algorithm","authors":"K. Jintamuttha, B. Watanapa, Nipon Charoenkitkarn","doi":"10.1109/CCSSE.2016.7784378","DOIUrl":"https://doi.org/10.1109/CCSSE.2016.7784378","url":null,"abstract":"Nowadays, traffic congestion is a crucial issue for many urban or even suburban areas. A potential but manageable cause of this effect is the inefficient control of traffic light timing cycle that is not proactively respond to the characteristics of the considering intersection and time-dependent condition of the traffic. In this paper, we propose a finite-interval model that finds effective green time for each of the four phases light timing in each cycle. The objective is to acquire satisficing solution, by means of Bat algorithm (BA) to minimize spoilage time at an intersection. The effectiveness of model was validated using a simulation experiment on a crowded intersection in Bangkok that has imbalanced numbers of accommodated lanes and formless urbanism. The traffic condition is simulated by the microscopic traffic simulator called `Simulation of Urban Mobility' (SUMO). The experimental result confirmed the effective improvement when compared with the traditional fix-time operational control.","PeriodicalId":136809,"journal":{"name":"2016 2nd International Conference on Control Science and Systems Engineering (ICCSSE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130806418","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 : 2016-07-01DOI: 10.1109/CCSSE.2016.7784362
Tang Chenghong, Wang Jinsong, Y. Zhihong, Jin Peng
To prevent the distribution network from being effected by the output power fluctuation of photovoltaic, wind and other renewable energy generation, this paper presents a coordinated optimization control strategy for hybrid energy storage system based on real-time online analysis of power spectrum. Compared with the smoothing method used nowadays, it solves the existing problem that the smoothing objective could not be satisfied in an extreme power fluctuate scenario; The developed device has been applied in a number of engineering projects and both the simulation and practical applications prove the effectiveness of the strategy to improve the power quality and realize a smooth access for renewable energy.
{"title":"Coordinated optimization control strategy for hybrid energy storage system based on real-time online analysis of power spectrum","authors":"Tang Chenghong, Wang Jinsong, Y. Zhihong, Jin Peng","doi":"10.1109/CCSSE.2016.7784362","DOIUrl":"https://doi.org/10.1109/CCSSE.2016.7784362","url":null,"abstract":"To prevent the distribution network from being effected by the output power fluctuation of photovoltaic, wind and other renewable energy generation, this paper presents a coordinated optimization control strategy for hybrid energy storage system based on real-time online analysis of power spectrum. Compared with the smoothing method used nowadays, it solves the existing problem that the smoothing objective could not be satisfied in an extreme power fluctuate scenario; The developed device has been applied in a number of engineering projects and both the simulation and practical applications prove the effectiveness of the strategy to improve the power quality and realize a smooth access for renewable energy.","PeriodicalId":136809,"journal":{"name":"2016 2nd International Conference on Control Science and Systems Engineering (ICCSSE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127079821","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 : 2016-07-01DOI: 10.1109/CCSSE.2016.7784355
Chao H. Huang, Jidong Suo, T. Liu
Based on the linear prediction (LP) property of sinusoidal signals, a novel autocorrelation approach for a single-tone sinusoidal signal emerged in Gaussian white noise is proposed. Firstly, a new closed-form autocorrelation expression is derived that it contributes more to frequency estimation than conventional autocorrelation expressions, then, inspired by RIM estimator, we propose a novel estimator using multiple autocorrelation lags. Computer simulations show that the accuracy of the proposed approach is closer to the Cramer-Rao bound(CRB) especially for lower signal noise radio(SNR) and has lower computation complexity via comparing with several autocorrelation-based estimators.
{"title":"A novel autocorrelation approach for frequency estimation of a sinusoid","authors":"Chao H. Huang, Jidong Suo, T. Liu","doi":"10.1109/CCSSE.2016.7784355","DOIUrl":"https://doi.org/10.1109/CCSSE.2016.7784355","url":null,"abstract":"Based on the linear prediction (LP) property of sinusoidal signals, a novel autocorrelation approach for a single-tone sinusoidal signal emerged in Gaussian white noise is proposed. Firstly, a new closed-form autocorrelation expression is derived that it contributes more to frequency estimation than conventional autocorrelation expressions, then, inspired by RIM estimator, we propose a novel estimator using multiple autocorrelation lags. Computer simulations show that the accuracy of the proposed approach is closer to the Cramer-Rao bound(CRB) especially for lower signal noise radio(SNR) and has lower computation complexity via comparing with several autocorrelation-based estimators.","PeriodicalId":136809,"journal":{"name":"2016 2nd International Conference on Control Science and Systems Engineering (ICCSSE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126943511","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 : 2016-07-01DOI: 10.1109/CCSSE.2016.7784393
Sulan Li, Yu Jin
In servo systems, there are various nonlinear factors, including friction, backlash and saturation, which will affect the system accuracy, even produce limit cycles. Therefore, the study of the nonlinearity in the system has important theoretical and engineering value. And limit-cycle caused by friction, including its generation and avoiding are focused on. Firstly, the description function for coulomb and viscosity friction model is derived, respectively. Secondly, the effect of numbers of frequency terms considered in description function is discussed. The feature of the phase and amplitude of limit-cycle is studied. Thirdly, a servo system with friction nonlinearity is taken as an example. The simulation results show the correctness of the theoretical deduction.
{"title":"Considering higher terms of description function for limit cycle generated by friction","authors":"Sulan Li, Yu Jin","doi":"10.1109/CCSSE.2016.7784393","DOIUrl":"https://doi.org/10.1109/CCSSE.2016.7784393","url":null,"abstract":"In servo systems, there are various nonlinear factors, including friction, backlash and saturation, which will affect the system accuracy, even produce limit cycles. Therefore, the study of the nonlinearity in the system has important theoretical and engineering value. And limit-cycle caused by friction, including its generation and avoiding are focused on. Firstly, the description function for coulomb and viscosity friction model is derived, respectively. Secondly, the effect of numbers of frequency terms considered in description function is discussed. The feature of the phase and amplitude of limit-cycle is studied. Thirdly, a servo system with friction nonlinearity is taken as an example. The simulation results show the correctness of the theoretical deduction.","PeriodicalId":136809,"journal":{"name":"2016 2nd International Conference on Control Science and Systems Engineering (ICCSSE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134424852","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 : 2016-07-01DOI: 10.1109/CCSSE.2016.7784375
Zhan-ying Lu, Yichen Xu, Zuoxiao Dai, Bei Ma
In the environment of complex background, load and night, the correct gait recognition rate is greatly affected in visible image, in order to solve this problem, this paper use thermal infrared imager to capture image in different body, different scene and different angle, then image threshold, frame-difference and contour auto adjustment method are used to extract human body outline, the feature vector of each joints are extracted by modified five link model, after that the extracted feature vector of each joint is passed to the SVM classifier to identify the characters. Leave-one-out method is used to calculate the correct rate of recognition, the final recognition correct rate is between 71-92%, in the night, load and other complex background scenes, the correct recognition rate is much better than visible light.
{"title":"A gait recognition based on link model of infrared thermal imaging","authors":"Zhan-ying Lu, Yichen Xu, Zuoxiao Dai, Bei Ma","doi":"10.1109/CCSSE.2016.7784375","DOIUrl":"https://doi.org/10.1109/CCSSE.2016.7784375","url":null,"abstract":"In the environment of complex background, load and night, the correct gait recognition rate is greatly affected in visible image, in order to solve this problem, this paper use thermal infrared imager to capture image in different body, different scene and different angle, then image threshold, frame-difference and contour auto adjustment method are used to extract human body outline, the feature vector of each joints are extracted by modified five link model, after that the extracted feature vector of each joint is passed to the SVM classifier to identify the characters. Leave-one-out method is used to calculate the correct rate of recognition, the final recognition correct rate is between 71-92%, in the night, load and other complex background scenes, the correct recognition rate is much better than visible light.","PeriodicalId":136809,"journal":{"name":"2016 2nd International Conference on Control Science and Systems Engineering (ICCSSE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130971494","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 : 2016-07-01DOI: 10.1109/CCSSE.2016.7784363
Yun-ming Wang, Duoping Zhang, Chengsheng Pan, Bo Chen
The factors such as hardware malfunction and invasion, can lead to the nodes and edges failure of Command and Control (C2) network, which divide the original connected network topology, even result in global network damage. To assess the invulnerability of the C2 network dynamically, this study has proposed a measurement of invulnerability for C2 network based on network invulnerability entropy, established an invulnerability entropy model based on the degree of network invulnerability, and put forward node criticality based on Level Flow Betweenness (LFB) and edge criticality based on information transfer efficiency, respectively. Simulation results showed that this measurement of invulnerability is highly sensitive and accurate, able to better reflects the invulnerability and provide a theoretical basis for design and optimization the structure of C2 network.
{"title":"Measure of invulnerability for command and control network based on network invulnerability entropy","authors":"Yun-ming Wang, Duoping Zhang, Chengsheng Pan, Bo Chen","doi":"10.1109/CCSSE.2016.7784363","DOIUrl":"https://doi.org/10.1109/CCSSE.2016.7784363","url":null,"abstract":"The factors such as hardware malfunction and invasion, can lead to the nodes and edges failure of Command and Control (C2) network, which divide the original connected network topology, even result in global network damage. To assess the invulnerability of the C2 network dynamically, this study has proposed a measurement of invulnerability for C2 network based on network invulnerability entropy, established an invulnerability entropy model based on the degree of network invulnerability, and put forward node criticality based on Level Flow Betweenness (LFB) and edge criticality based on information transfer efficiency, respectively. Simulation results showed that this measurement of invulnerability is highly sensitive and accurate, able to better reflects the invulnerability and provide a theoretical basis for design and optimization the structure of C2 network.","PeriodicalId":136809,"journal":{"name":"2016 2nd International Conference on Control Science and Systems Engineering (ICCSSE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2016-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124705049","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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