The high pressure common rail fuel systems (HPCRFS) are widely utilized to meet EURO VI emissions and efficiency targets. The common rail pressure of the HPCRFS has to be extremely precisely and flexibly controlled because the common rail pressure determines the fuel injection pressure and the fuel injected quality. Therefore, an active disturbance rejection controller (ADRC) based control algorithm of the common rail pressure is proposed in order to catch up the rapid changes of the common rail pressure and balance the fluctuation of the common rail pressure. The simulation results show that ADRC based control algorithm of the common rail pressure has fast dynamic response and high control accuracy. Therefore, ADRC can be well applied to research and development on the control algorithm of the common rail pressure for the HPCRFS.
{"title":"Research on ADRC Based Control Algorithm of Common Rail Pressure for Diesel Engines","authors":"Jian Ling, Jingyuan Li, Xiaowei Wang, Yong Li, Xiaopan An, Zhenkai Xie","doi":"10.1109/ICAIIS49377.2020.9194951","DOIUrl":"https://doi.org/10.1109/ICAIIS49377.2020.9194951","url":null,"abstract":"The high pressure common rail fuel systems (HPCRFS) are widely utilized to meet EURO VI emissions and efficiency targets. The common rail pressure of the HPCRFS has to be extremely precisely and flexibly controlled because the common rail pressure determines the fuel injection pressure and the fuel injected quality. Therefore, an active disturbance rejection controller (ADRC) based control algorithm of the common rail pressure is proposed in order to catch up the rapid changes of the common rail pressure and balance the fluctuation of the common rail pressure. The simulation results show that ADRC based control algorithm of the common rail pressure has fast dynamic response and high control accuracy. Therefore, ADRC can be well applied to research and development on the control algorithm of the common rail pressure for the HPCRFS.","PeriodicalId":416002,"journal":{"name":"2020 IEEE International Conference on Artificial Intelligence and Information Systems (ICAIIS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131231219","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}
In facility infrastructure companies, factories, hospitals and towns without their own generators, transformers are important step-up and step-down devices in power transmission systems. Transformer users often face challenges including how to reduce human maintenance of transformer maintenance, transformer temperature, obtaining real-time operating data, remotely monitoring transformers, or data collection and analysis. However, this study develops a low cost system for monitoring the status of remote distribution transformers using GSM technology. The system performance was modelled and simulated at different transformer loads. The system was able to activate the cooling system case of over temperature, switch of the transformer in case the problem still persists and sent a message to the user via short message service (SMS). This research realizes intelligent monitoring at a low price, which is an important value and contribution.
{"title":"Study of Smart Monitoring and Protection of Remote Transformers and Transmission Lines using GSM Technology","authors":"David Kwabena Amesimenu, Kuo-Chi Chang, Tien-Wen Sung, Yu-Wen Zhou, Joram Gakiza, Abdalaziz Altayeb Ibrahim Omer, Shoaib Ahmad, Kai-Chun Chu, Shamim Md Obaydul Haque","doi":"10.1109/ICAIIS49377.2020.9194907","DOIUrl":"https://doi.org/10.1109/ICAIIS49377.2020.9194907","url":null,"abstract":"In facility infrastructure companies, factories, hospitals and towns without their own generators, transformers are important step-up and step-down devices in power transmission systems. Transformer users often face challenges including how to reduce human maintenance of transformer maintenance, transformer temperature, obtaining real-time operating data, remotely monitoring transformers, or data collection and analysis. However, this study develops a low cost system for monitoring the status of remote distribution transformers using GSM technology. The system performance was modelled and simulated at different transformer loads. The system was able to activate the cooling system case of over temperature, switch of the transformer in case the problem still persists and sent a message to the user via short message service (SMS). This research realizes intelligent monitoring at a low price, which is an important value and contribution.","PeriodicalId":416002,"journal":{"name":"2020 IEEE International Conference on Artificial Intelligence and Information Systems (ICAIIS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130162404","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 : 2020-03-01DOI: 10.1109/ICAIIS49377.2020.9194940
Wenqiang Tao, Yuling He, Huan Lei, Wen Zhang, Yue-Xin Sun, Tao Wang
The stator-core temperature characteristics under the static air-gap eccentricity in turbo-generator is analyzed and calculated in this paper. Firstly, the theoretical formula of magnetic field density under static air-gap eccentricity is deduced. Then, the calculation formula of hysteresis loss and eddy current loss of the stator-core based on the theoretical formula of magnetic field density is obtained and regular pattern is analyzed under static air-gap eccentricity. Finally the three-dimensional generator model was established to analyze stator-core temperature field distribution under static air-gap eccentricity by Maxwell-Ansys Workbench. The simulation results were consistent with the theoretical analysis, which verifies accuracy of the research method. It is shown that hysteresis loss and eddy current loss of the stator-core will increase due to the increment of static air-gap eccentricity, which further leads to the rise of stator-core temperature.
{"title":"Research on Stator-Core Temperature Characteristics under Static Air-Gap Eccentricity in Turbo-generator","authors":"Wenqiang Tao, Yuling He, Huan Lei, Wen Zhang, Yue-Xin Sun, Tao Wang","doi":"10.1109/ICAIIS49377.2020.9194940","DOIUrl":"https://doi.org/10.1109/ICAIIS49377.2020.9194940","url":null,"abstract":"The stator-core temperature characteristics under the static air-gap eccentricity in turbo-generator is analyzed and calculated in this paper. Firstly, the theoretical formula of magnetic field density under static air-gap eccentricity is deduced. Then, the calculation formula of hysteresis loss and eddy current loss of the stator-core based on the theoretical formula of magnetic field density is obtained and regular pattern is analyzed under static air-gap eccentricity. Finally the three-dimensional generator model was established to analyze stator-core temperature field distribution under static air-gap eccentricity by Maxwell-Ansys Workbench. The simulation results were consistent with the theoretical analysis, which verifies accuracy of the research method. It is shown that hysteresis loss and eddy current loss of the stator-core will increase due to the increment of static air-gap eccentricity, which further leads to the rise of stator-core temperature.","PeriodicalId":416002,"journal":{"name":"2020 IEEE International Conference on Artificial Intelligence and Information Systems (ICAIIS)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114547741","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 : 2020-03-01DOI: 10.1109/ICAIIS49377.2020.9194873
Q. Dong, Liang Zhao, Jianzhong Zhao, Xiaoxiao Liu
Combined with multiple maintenance modes and current research on LORA (Level of Repair Analysis), synthesis decision approach of LORA is presented based on decision flow, which can be solved by TOPSIS method and genetic algorithm, as the foundation of following research. The result shows that the method is effective for the LORA problem, and offers lessons for solution of other multiple maintenance optimization problems.
{"title":"Synthesis Decision Approach of LORA Based on Decision Flow","authors":"Q. Dong, Liang Zhao, Jianzhong Zhao, Xiaoxiao Liu","doi":"10.1109/ICAIIS49377.2020.9194873","DOIUrl":"https://doi.org/10.1109/ICAIIS49377.2020.9194873","url":null,"abstract":"Combined with multiple maintenance modes and current research on LORA (Level of Repair Analysis), synthesis decision approach of LORA is presented based on decision flow, which can be solved by TOPSIS method and genetic algorithm, as the foundation of following research. The result shows that the method is effective for the LORA problem, and offers lessons for solution of other multiple maintenance optimization problems.","PeriodicalId":416002,"journal":{"name":"2020 IEEE International Conference on Artificial Intelligence and Information Systems (ICAIIS)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122022593","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}
Grey wolf optimizer (GWO) has shown to converge rapidly during the initial stage of a global search, but it still frequently stick into local optimal. In contrast, spherical evolution (SE) adopts a brand new spherical search style and has good abilities of local optimum avoidance. The focus of this research is on incorporating SE into GWO for optimization problems. This hybrid method generates a new generation of individuals by alternating the leadership hierarchy and hunting mechanism of GWO and the spherical search style of SE. The experiment results on CEC2017 benchmark functions indicate the effectiveness of this hybridization, suggesting that grey wolf search mechanism and spherical search style are complementary. This study gives not only more insights into both original algorithms, but also a novel construction method of merging different algorithms.
{"title":"A Novel Spherical Search Based Grey Wolf Optimizer for Optimization Problems","authors":"Zhe Wang, Haichuan Yang, Ziqian Wang, Yuki Todo, Zheng Tang, Shangce Gao","doi":"10.1109/ICAIIS49377.2020.9194816","DOIUrl":"https://doi.org/10.1109/ICAIIS49377.2020.9194816","url":null,"abstract":"Grey wolf optimizer (GWO) has shown to converge rapidly during the initial stage of a global search, but it still frequently stick into local optimal. In contrast, spherical evolution (SE) adopts a brand new spherical search style and has good abilities of local optimum avoidance. The focus of this research is on incorporating SE into GWO for optimization problems. This hybrid method generates a new generation of individuals by alternating the leadership hierarchy and hunting mechanism of GWO and the spherical search style of SE. The experiment results on CEC2017 benchmark functions indicate the effectiveness of this hybridization, suggesting that grey wolf search mechanism and spherical search style are complementary. This study gives not only more insights into both original algorithms, but also a novel construction method of merging different algorithms.","PeriodicalId":416002,"journal":{"name":"2020 IEEE International Conference on Artificial Intelligence and Information Systems (ICAIIS)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128170914","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 : 2020-03-01DOI: 10.1109/ICAIIS49377.2020.9194811
Weijin Huang, Hongzhe Jin, Mingda Ge, Jie Zhao
As an important part of the mobile robot, the rod-climbing robot is mainly responsible for reliably carrying cleaning and maintenance equipment. It overcomes the effect of gravity and is attached to high-rise rods such as pipes, utility poles, lighting poles, cable stays of bridge and lightning rods of substation. The tasks such as cleaning, detection, maintenance, etc. can be conducted more safely, efficiently and economically compared with manual work. Though, there exist some types of rod-climbing robots with different mechanical structures, their structures are too heavy or control is too complicated. This paper presents a new pressure-adsorption climbing robot, which is realized through ducted fan. Compared with the existed rod-climbing robots, the presented one have the advantages of simplified structure, easy control, small volume, light weight and strong adaptability. The feasibility of the new designed robot is experimentally verified.
{"title":"A New Pressure-adsorption Climbing Robot Realized through Ducted Fan","authors":"Weijin Huang, Hongzhe Jin, Mingda Ge, Jie Zhao","doi":"10.1109/ICAIIS49377.2020.9194811","DOIUrl":"https://doi.org/10.1109/ICAIIS49377.2020.9194811","url":null,"abstract":"As an important part of the mobile robot, the rod-climbing robot is mainly responsible for reliably carrying cleaning and maintenance equipment. It overcomes the effect of gravity and is attached to high-rise rods such as pipes, utility poles, lighting poles, cable stays of bridge and lightning rods of substation. The tasks such as cleaning, detection, maintenance, etc. can be conducted more safely, efficiently and economically compared with manual work. Though, there exist some types of rod-climbing robots with different mechanical structures, their structures are too heavy or control is too complicated. This paper presents a new pressure-adsorption climbing robot, which is realized through ducted fan. Compared with the existed rod-climbing robots, the presented one have the advantages of simplified structure, easy control, small volume, light weight and strong adaptability. The feasibility of the new designed robot is experimentally verified.","PeriodicalId":416002,"journal":{"name":"2020 IEEE International Conference on Artificial Intelligence and Information Systems (ICAIIS)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127287776","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 : 2020-03-01DOI: 10.1109/ICAIIS49377.2020.9194804
Xinkuo Wang, Mei Wu, Gaoyuan Liu, Na Sun
Design and simulation of vertical pitch attitude and height control system of the ground effect vehicle based on active disturbance rejection control: As for the uncertainty of aerodynamic parameters such as fixed perturbation of the ground effect vehicle, atmospheric disturbance and wave noise, the second-order auto-disturbance rejection controller has been used to control the pitch attitude of the ground effect vehicle and the first-order active disturbance rejection controller has been used to control the altitude to achieve height stability control. The controller designed in this thesis has been verified by simulation in MATLAB, the simulation result showed that the proposed pitch angle ADRC and height ADRC are rational, anti-jamming and robust.
{"title":"Design of Longitudinal Control System for Ground Effect Vehicle Based on Auto-disturbance Rejection","authors":"Xinkuo Wang, Mei Wu, Gaoyuan Liu, Na Sun","doi":"10.1109/ICAIIS49377.2020.9194804","DOIUrl":"https://doi.org/10.1109/ICAIIS49377.2020.9194804","url":null,"abstract":"Design and simulation of vertical pitch attitude and height control system of the ground effect vehicle based on active disturbance rejection control: As for the uncertainty of aerodynamic parameters such as fixed perturbation of the ground effect vehicle, atmospheric disturbance and wave noise, the second-order auto-disturbance rejection controller has been used to control the pitch attitude of the ground effect vehicle and the first-order active disturbance rejection controller has been used to control the altitude to achieve height stability control. The controller designed in this thesis has been verified by simulation in MATLAB, the simulation result showed that the proposed pitch angle ADRC and height ADRC are rational, anti-jamming and robust.","PeriodicalId":416002,"journal":{"name":"2020 IEEE International Conference on Artificial Intelligence and Information Systems (ICAIIS)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124410342","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 : 2020-03-01DOI: 10.1109/ICAIIS49377.2020.9194889
Gengyi Xiao
In order to achieve remote monitoring of PM2.5 and PM10 concentration changes in the air, a distributed centralized remote air quality monitoring system using the C / S architecture of computer network technology is adopted. The system uses multiple control quality monitoring stations to collect the concentrations of PM2.5 and PM10 suspended particles in the air through sensors SOS011, and establish a TCP / IP network connection with the monitoring centre server through the GPRS module SIM900A for data interaction; the monitoring centre server Receive, process, statistically analyse and display data from various monitoring stations, and store it in the database SQL2008, which is convenient to form time, day, month and year reports. The implementation results show that the GPRS / SMS-based remote monitoring system for gas emissions from construction and mining enterprises has been analysed in detail, and the program code for gas emissions monitoring from construction and mining enterprises has been given. The proposed system has high flexibility, efficiency and accuracy.
{"title":"Application and Research of Computer Network Technology in Remote Monitoring","authors":"Gengyi Xiao","doi":"10.1109/ICAIIS49377.2020.9194889","DOIUrl":"https://doi.org/10.1109/ICAIIS49377.2020.9194889","url":null,"abstract":"In order to achieve remote monitoring of PM2.5 and PM10 concentration changes in the air, a distributed centralized remote air quality monitoring system using the C / S architecture of computer network technology is adopted. The system uses multiple control quality monitoring stations to collect the concentrations of PM2.5 and PM10 suspended particles in the air through sensors SOS011, and establish a TCP / IP network connection with the monitoring centre server through the GPRS module SIM900A for data interaction; the monitoring centre server Receive, process, statistically analyse and display data from various monitoring stations, and store it in the database SQL2008, which is convenient to form time, day, month and year reports. The implementation results show that the GPRS / SMS-based remote monitoring system for gas emissions from construction and mining enterprises has been analysed in detail, and the program code for gas emissions monitoring from construction and mining enterprises has been given. The proposed system has high flexibility, efficiency and accuracy.","PeriodicalId":416002,"journal":{"name":"2020 IEEE International Conference on Artificial Intelligence and Information Systems (ICAIIS)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121604694","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 : 2020-03-01DOI: 10.1109/ICAIIS49377.2020.9194905
X. Hao, Yu Shi, Xiaohong Yan
Voice signal enhancement has broad application prospects, but the existing methods have limited effect in conference rooms or teleconferences in a strong noise environment. In order to enhance the speech effect, this paper proposes a speech enhancement algorithm based on time-delay estimation of microphone sound source localization. The algorithm combines Independent Component Analysis (ICA) and Wiener filtering. The algorithm uses the negative entropy of fast independent component analysis algorithm (FastICA) to extract feature and separate the speech signal, and then uses Wiener filtering to minimize the mean square error between the estimated signal and the speech signal extracted by the feature in the ICA domain. The paper deduces the unmixing matrix of the ICA transform in detail, and simulates the speech enhancement capability of the algorithm through Matlab. Simulation results show that the algorithm has obvious enhancement effect, and it can effectively reduce noise.
{"title":"Speech enhancement algorithm based on independent component analysis in noisy environment","authors":"X. Hao, Yu Shi, Xiaohong Yan","doi":"10.1109/ICAIIS49377.2020.9194905","DOIUrl":"https://doi.org/10.1109/ICAIIS49377.2020.9194905","url":null,"abstract":"Voice signal enhancement has broad application prospects, but the existing methods have limited effect in conference rooms or teleconferences in a strong noise environment. In order to enhance the speech effect, this paper proposes a speech enhancement algorithm based on time-delay estimation of microphone sound source localization. The algorithm combines Independent Component Analysis (ICA) and Wiener filtering. The algorithm uses the negative entropy of fast independent component analysis algorithm (FastICA) to extract feature and separate the speech signal, and then uses Wiener filtering to minimize the mean square error between the estimated signal and the speech signal extracted by the feature in the ICA domain. The paper deduces the unmixing matrix of the ICA transform in detail, and simulates the speech enhancement capability of the algorithm through Matlab. Simulation results show that the algorithm has obvious enhancement effect, and it can effectively reduce noise.","PeriodicalId":416002,"journal":{"name":"2020 IEEE International Conference on Artificial Intelligence and Information Systems (ICAIIS)","volume":"430 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116543010","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 : 2020-03-01DOI: 10.1109/ICAIIS49377.2020.9194857
Yujie Geng, Yi Guan, Yong Liu, Q. Ma, Lin Lin, Mengjuan Cai
In order to ensure the safe and healthy operation of the power dispatching cloud control system, an integrity measurement method for key business code segments in the power dispatching cloud control system is proposed to address the security of the key services in the cloud environment. The method can verify the integrity of the code segment of the process running in the virtual machines at the VMM layer in an agentless manner without the need to ensure that all the code segments of the process are loaded into memory. This proposed method can provide better security for the key business of power dispatching control system to ensure stability in the business program with no interruption and malicious tampering. The experiments show that the proposed method has better applicability and flexibility compared with other methods of the same type.
{"title":"Integrity Measurement Method for Key Business Code Segments in Power Dispatching Cloud Control System","authors":"Yujie Geng, Yi Guan, Yong Liu, Q. Ma, Lin Lin, Mengjuan Cai","doi":"10.1109/ICAIIS49377.2020.9194857","DOIUrl":"https://doi.org/10.1109/ICAIIS49377.2020.9194857","url":null,"abstract":"In order to ensure the safe and healthy operation of the power dispatching cloud control system, an integrity measurement method for key business code segments in the power dispatching cloud control system is proposed to address the security of the key services in the cloud environment. The method can verify the integrity of the code segment of the process running in the virtual machines at the VMM layer in an agentless manner without the need to ensure that all the code segments of the process are loaded into memory. This proposed method can provide better security for the key business of power dispatching control system to ensure stability in the business program with no interruption and malicious tampering. The experiments show that the proposed method has better applicability and flexibility compared with other methods of the same type.","PeriodicalId":416002,"journal":{"name":"2020 IEEE International Conference on Artificial Intelligence and Information Systems (ICAIIS)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122245878","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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