Pub Date : 2016-10-01DOI: 10.1109/ETCM.2016.7750810
Y. Rybarczyk, R. Zalakeviciute
This work addresses the question of how to predict fine particulate matter given a combination of weather conditions. A compilation of several years of meteorological data in the city of Quito, Ecuador, are used to build models using a machine learning approach. The study presents a decision tree algorithm that learns to classify the concentrations of fine aerosols, into two categories (>15μg/m3 vs. <;15μg/m3), from a limited number of parameters such as the level of precipitation and the wind speed and direction. Requiring few rules, the resulting models are able to infer the concentration outcome with significant accuracy. This fundamental research intends to be a preliminary step in the development of a web-based platform and smartphone app to alert the inhabitants of Ecuador's capital about the risk to human health, with potential future application in other urban areas.
{"title":"Machine learning approach to forecasting urban pollution","authors":"Y. Rybarczyk, R. Zalakeviciute","doi":"10.1109/ETCM.2016.7750810","DOIUrl":"https://doi.org/10.1109/ETCM.2016.7750810","url":null,"abstract":"This work addresses the question of how to predict fine particulate matter given a combination of weather conditions. A compilation of several years of meteorological data in the city of Quito, Ecuador, are used to build models using a machine learning approach. The study presents a decision tree algorithm that learns to classify the concentrations of fine aerosols, into two categories (>15μg/m3 vs. <;15μg/m3), from a limited number of parameters such as the level of precipitation and the wind speed and direction. Requiring few rules, the resulting models are able to infer the concentration outcome with significant accuracy. This fundamental research intends to be a preliminary step in the development of a web-based platform and smartphone app to alert the inhabitants of Ecuador's capital about the risk to human health, with potential future application in other urban areas.","PeriodicalId":6480,"journal":{"name":"2016 IEEE Ecuador Technical Chapters Meeting (ETCM)","volume":"22 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84674272","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 : 2016-10-01DOI: 10.1109/ETCM.2016.7750850
Xavier Domínguez, Marcelo Pozo, Carlos Gallardo, L. Ortega
The present work develops the entire control system to achieve the active power regulation in a detailed model of a small-scale Virtual Power Plant (VPP). Firstly, the proposed VPP topology is exposed. A DC bus has been used for the integration of the different distributed generators and the storage system. Different DC-DC power converters schemes have been employed to fulfill this goal. Later, by means of an Energy Management System strategy who commands a three-leg three-phase inverter having a suitable modulation technique, the control of the demanded active power is performed. The results exhibit successful responses of the system for both, dynamic and steady state.
{"title":"Active power control of a Virtual Power Plant","authors":"Xavier Domínguez, Marcelo Pozo, Carlos Gallardo, L. Ortega","doi":"10.1109/ETCM.2016.7750850","DOIUrl":"https://doi.org/10.1109/ETCM.2016.7750850","url":null,"abstract":"The present work develops the entire control system to achieve the active power regulation in a detailed model of a small-scale Virtual Power Plant (VPP). Firstly, the proposed VPP topology is exposed. A DC bus has been used for the integration of the different distributed generators and the storage system. Different DC-DC power converters schemes have been employed to fulfill this goal. Later, by means of an Energy Management System strategy who commands a three-leg three-phase inverter having a suitable modulation technique, the control of the demanded active power is performed. The results exhibit successful responses of the system for both, dynamic and steady state.","PeriodicalId":6480,"journal":{"name":"2016 IEEE Ecuador Technical Chapters Meeting (ETCM)","volume":"25 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77564439","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 : 2016-10-01DOI: 10.1109/ETCM.2016.7750862
Wilson A. Vasquez, F. Quilumba
This paper proposes an algorithm to build a dynamic data matrix (DDM) that allows organizing the topology information of a radial distribution system (RDS). The DDM is then used in load flow analysis of RDSs with and without distributed generation (DG). The deterministic equations of the load flow method and the iterative loop to find the bus voltage magnitude and phase angle solutions of an RDS are presented. The load flow method is valid for RDSs with or without DGs, and it is flexible for RDS reconfiguration. A computational program was developed in MATLAB to build the DDM and run the load flow for RDSs of n buses. Finally, the load flow program performance is analyzed with two radial distribution systems of 33 and 119 buses. The results show that the DDM's algorithm and the load flow method are computationally efficient and that the load flow program converges in a short number of iterations.
{"title":"Load flow method for radial distribution systems with distributed generation using a dynamic data matrix","authors":"Wilson A. Vasquez, F. Quilumba","doi":"10.1109/ETCM.2016.7750862","DOIUrl":"https://doi.org/10.1109/ETCM.2016.7750862","url":null,"abstract":"This paper proposes an algorithm to build a dynamic data matrix (DDM) that allows organizing the topology information of a radial distribution system (RDS). The DDM is then used in load flow analysis of RDSs with and without distributed generation (DG). The deterministic equations of the load flow method and the iterative loop to find the bus voltage magnitude and phase angle solutions of an RDS are presented. The load flow method is valid for RDSs with or without DGs, and it is flexible for RDS reconfiguration. A computational program was developed in MATLAB to build the DDM and run the load flow for RDSs of n buses. Finally, the load flow program performance is analyzed with two radial distribution systems of 33 and 119 buses. The results show that the DDM's algorithm and the load flow method are computationally efficient and that the load flow program converges in a short number of iterations.","PeriodicalId":6480,"journal":{"name":"2016 IEEE Ecuador Technical Chapters Meeting (ETCM)","volume":"113 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77845495","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 : 2016-10-01DOI: 10.1109/ETCM.2016.7750818
Edwin García, I. Isaac
This document presents demand energy response optimization in residential sector which energy required for demand supply is provided by electric system, which may have distributed generation, demand optimization objective is to flatten the demand peak curve, thus this promotes energy maintenance by users without producing comfort affections, for which an storage energy system through batteries is used allowing a system energy decrease provided by the electric system to the user. Management energy system allow to respond relieving load to the electric system, especially when peak demand response presents and when energy cost is greater, providing energy to the battery set, besides this research routes usage of surplus energy of electric vehicles.
{"title":"Demand response systems for integrating energy storage batteries for residential users","authors":"Edwin García, I. Isaac","doi":"10.1109/ETCM.2016.7750818","DOIUrl":"https://doi.org/10.1109/ETCM.2016.7750818","url":null,"abstract":"This document presents demand energy response optimization in residential sector which energy required for demand supply is provided by electric system, which may have distributed generation, demand optimization objective is to flatten the demand peak curve, thus this promotes energy maintenance by users without producing comfort affections, for which an storage energy system through batteries is used allowing a system energy decrease provided by the electric system to the user. Management energy system allow to respond relieving load to the electric system, especially when peak demand response presents and when energy cost is greater, providing energy to the battery set, besides this research routes usage of surplus energy of electric vehicles.","PeriodicalId":6480,"journal":{"name":"2016 IEEE Ecuador Technical Chapters Meeting (ETCM)","volume":"8 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80234744","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 : 2016-10-01DOI: 10.1109/ETCM.2016.7750812
R. Barbosa, David Nunes, A. Figueira, H. Aguiar, J. S. Silva, Fredy Marin Gonzalez, Carlos Herrera, S. Sinche
In the past few years, the idea of the “Internet of Things” (IoT) has been developing rapidly, with sensors and machines communicating with each other through the Internet. These new technologies can be used to support new types of Cyber-Physical Systems (CPS). Even though CPS consider humans as a part of themselves, they still treat humans as external elements, with unpredictable behavior. In fact, in order to the new IoT serves human needs better, it has to take into account all sorts of psychological and emotional states. Smartphones present an excellent opportunity to do so as they are a key element in IoT and they contain several sensors that allow us to collect information about user movement, location, environment, and interactions with other people. This type of mobile device usually accompanies the user anywhere he goes throughout the day. This paper presents a work about a new paradigm that integrates human in the IoT. This paradigm is validated by the implementation of 3 applications that are detailed in this paper - HappyWalk, WeDocare and HappySpeak.
{"title":"An architecture for emotional smartphones in Internet of Things","authors":"R. Barbosa, David Nunes, A. Figueira, H. Aguiar, J. S. Silva, Fredy Marin Gonzalez, Carlos Herrera, S. Sinche","doi":"10.1109/ETCM.2016.7750812","DOIUrl":"https://doi.org/10.1109/ETCM.2016.7750812","url":null,"abstract":"In the past few years, the idea of the “Internet of Things” (IoT) has been developing rapidly, with sensors and machines communicating with each other through the Internet. These new technologies can be used to support new types of Cyber-Physical Systems (CPS). Even though CPS consider humans as a part of themselves, they still treat humans as external elements, with unpredictable behavior. In fact, in order to the new IoT serves human needs better, it has to take into account all sorts of psychological and emotional states. Smartphones present an excellent opportunity to do so as they are a key element in IoT and they contain several sensors that allow us to collect information about user movement, location, environment, and interactions with other people. This type of mobile device usually accompanies the user anywhere he goes throughout the day. This paper presents a work about a new paradigm that integrates human in the IoT. This paradigm is validated by the implementation of 3 applications that are detailed in this paper - HappyWalk, WeDocare and HappySpeak.","PeriodicalId":6480,"journal":{"name":"2016 IEEE Ecuador Technical Chapters Meeting (ETCM)","volume":"22 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87036403","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 : 2016-10-01DOI: 10.1109/ETCM.2016.7750824
Washington Medina, J. Gomez, Francisco Novillo
Dense urban zones with high concentration of Wireless networks can degenerate in problems such as spectrum scarcity for devices in licensed bands, or high interference levels for devices in unlicensed bands, thus producing QoS problem. A possible solution to deal with this issue is the use of wireless devices to access opportunistically a licensed band. For this reason, this paper evaluates a channel's probabilistic model in urban zones to allow unlicensed band devices to access the licensed bands (e.g. TV Band) in an opportunistic way. As result of this study, the channel capacity of the band is compared with different technologies.
{"title":"Evaluating channel capacity oportunities for potential use by short range devices based on OSA","authors":"Washington Medina, J. Gomez, Francisco Novillo","doi":"10.1109/ETCM.2016.7750824","DOIUrl":"https://doi.org/10.1109/ETCM.2016.7750824","url":null,"abstract":"Dense urban zones with high concentration of Wireless networks can degenerate in problems such as spectrum scarcity for devices in licensed bands, or high interference levels for devices in unlicensed bands, thus producing QoS problem. A possible solution to deal with this issue is the use of wireless devices to access opportunistically a licensed band. For this reason, this paper evaluates a channel's probabilistic model in urban zones to allow unlicensed band devices to access the licensed bands (e.g. TV Band) in an opportunistic way. As result of this study, the channel capacity of the band is compared with different technologies.","PeriodicalId":6480,"journal":{"name":"2016 IEEE Ecuador Technical Chapters Meeting (ETCM)","volume":"2 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82566851","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 : 2016-10-01DOI: 10.1109/ETCM.2016.7750811
H. Nieto-Chaupis, Hernán Matta
We used computational simulation inside a teleconsult scheme to predict the levels of diabetes progress of a sample of type-2 diabetes adult patients. Concretely, we have used computational algorithms to estimate the fraction of patients which would acquire diabetes complications such as necrosis, nephropathy and unexpected cardiovascular events. For this end, we have constructed a general function G which gives account of the behavior of glucose in time, but it is depending of up to 4 free parameters representing in somewhat: diet, pharmacology, attitude of patient against the progress of disease, and a random number by the which it might be consistent with the binge eating disorder. From the results of this paper around 5±1 patients might increase their probabilities to pass to the subsequent diabetes such diabetic nephropathy.
{"title":"Evaluation of type-2 diabetes progress in adult patients by using predictive algorithms","authors":"H. Nieto-Chaupis, Hernán Matta","doi":"10.1109/ETCM.2016.7750811","DOIUrl":"https://doi.org/10.1109/ETCM.2016.7750811","url":null,"abstract":"We used computational simulation inside a teleconsult scheme to predict the levels of diabetes progress of a sample of type-2 diabetes adult patients. Concretely, we have used computational algorithms to estimate the fraction of patients which would acquire diabetes complications such as necrosis, nephropathy and unexpected cardiovascular events. For this end, we have constructed a general function G which gives account of the behavior of glucose in time, but it is depending of up to 4 free parameters representing in somewhat: diet, pharmacology, attitude of patient against the progress of disease, and a random number by the which it might be consistent with the binge eating disorder. From the results of this paper around 5±1 patients might increase their probabilities to pass to the subsequent diabetes such diabetic nephropathy.","PeriodicalId":6480,"journal":{"name":"2016 IEEE Ecuador Technical Chapters Meeting (ETCM)","volume":"25 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86551376","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 : 2016-10-01DOI: 10.1109/ETCM.2016.7750826
Carlos Valdivieso, Francisco Novillo, J. Gomez, Daniel Dik
Nowadays the deployment of Wireless Sensor Networks (WSN) is rapidly increasing specially in dense urban scenarios, due to upcoming new technologies based on Internet of things. In this context, the presence of WSN, Wi-Fi and Bluetooth sharing the ISM band, could cause unsuspected interference levels that could deteriorate channel capacity in WSN and consequently deteriorate the performance of WSN and other wireless systems. Viewing this future perspective, this paper sees the importance of evaluating the performance of WSN under dense urban scenarios considering chaotic interference conditions. For this reason, a Manhattan type scenario with different concentration of WSN and Wi-Fi devices is selected and analyzed in order to detect the existence of severe interference problems for WSN channel capacity under dense urban scenarios.
{"title":"Performance evaluation of channel capacity in Wireless Sensor Networks using ISM band in dense urban scenarios","authors":"Carlos Valdivieso, Francisco Novillo, J. Gomez, Daniel Dik","doi":"10.1109/ETCM.2016.7750826","DOIUrl":"https://doi.org/10.1109/ETCM.2016.7750826","url":null,"abstract":"Nowadays the deployment of Wireless Sensor Networks (WSN) is rapidly increasing specially in dense urban scenarios, due to upcoming new technologies based on Internet of things. In this context, the presence of WSN, Wi-Fi and Bluetooth sharing the ISM band, could cause unsuspected interference levels that could deteriorate channel capacity in WSN and consequently deteriorate the performance of WSN and other wireless systems. Viewing this future perspective, this paper sees the importance of evaluating the performance of WSN under dense urban scenarios considering chaotic interference conditions. For this reason, a Manhattan type scenario with different concentration of WSN and Wi-Fi devices is selected and analyzed in order to detect the existence of severe interference problems for WSN channel capacity under dense urban scenarios.","PeriodicalId":6480,"journal":{"name":"2016 IEEE Ecuador Technical Chapters Meeting (ETCM)","volume":"62 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83994329","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 : 2016-10-01DOI: 10.1109/ETCM.2016.7750869
Diego Mogrovejo, E. Granado, W. Colmenares, J. Zambrano, F. Quizhpi
This paper shows a robust multivariable PID controller design for a nonlinear quadruple tank process. The controller synthesis is reduced to an equivalent static output feedback control problem. The closed loop β /2 -stabilizable performance is guarantee for the linearized system with convex polytopic uncertainty. The algorithm is based on an iterative linear matrix inequality approach. The Parameter-dependent Lyapunov matrix functions, together with the Lyapunov matrix and the system dynamic matrix decoupling, are used in robust stabilizability conditions for conservatism reduction in the robust problem formulation. The design technique is illustrated with a numerical example.
{"title":"Robust multivariable PID control for quadruple-tank process using an ILMI approach","authors":"Diego Mogrovejo, E. Granado, W. Colmenares, J. Zambrano, F. Quizhpi","doi":"10.1109/ETCM.2016.7750869","DOIUrl":"https://doi.org/10.1109/ETCM.2016.7750869","url":null,"abstract":"This paper shows a robust multivariable PID controller design for a nonlinear quadruple tank process. The controller synthesis is reduced to an equivalent static output feedback control problem. The closed loop β /2 -stabilizable performance is guarantee for the linearized system with convex polytopic uncertainty. The algorithm is based on an iterative linear matrix inequality approach. The Parameter-dependent Lyapunov matrix functions, together with the Lyapunov matrix and the system dynamic matrix decoupling, are used in robust stabilizability conditions for conservatism reduction in the robust problem formulation. The design technique is illustrated with a numerical example.","PeriodicalId":6480,"journal":{"name":"2016 IEEE Ecuador Technical Chapters Meeting (ETCM)","volume":"299302 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77877861","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 : 2016-10-01DOI: 10.1109/ETCM.2016.7750870
O. Pita, G. Baquerizo, Carmen Vaca, Jonathan Mendieta, M. Villavicencio, Jorge Rodriguez
Social interaction on microblogging platforms is becoming a reliable instrument for studying political communication characteristics. Microblogging platforms, such as Twitter, let citizens to engage in the political debate generating well-defined profiles in the platform. Using publicly available tweets it is possible to build a linguistic profile to compare leaders and average citizens. We describe the linguistic analysis of 330,000 tweets collected from 221 Ecuadorian tweeters classified into three different profiles: political leaders, leaders' followers, and average local users. We build a feature vector for each user's tweets using 12 psychological dimensions included in the LIWC (Linguistic Inquiry Word Count) text analysis software and compare users with different profiles using those vectors. Our findings show that the leaders group exhibits a different linguistic profile from the others two groups: around 30% of leader followers are similar to at least one leader while just 19% of average local users are similar to at least one leader. Furthermore, the results of our analysis allows to determine whether local users have some similar characteristics of language uses on social networks of political leaders' followers without relying on critical discourse analysis.
{"title":"Linguistic profiles on microblogging platforms to characterize political leaders: The Ecuadorian case on Twitter","authors":"O. Pita, G. Baquerizo, Carmen Vaca, Jonathan Mendieta, M. Villavicencio, Jorge Rodriguez","doi":"10.1109/ETCM.2016.7750870","DOIUrl":"https://doi.org/10.1109/ETCM.2016.7750870","url":null,"abstract":"Social interaction on microblogging platforms is becoming a reliable instrument for studying political communication characteristics. Microblogging platforms, such as Twitter, let citizens to engage in the political debate generating well-defined profiles in the platform. Using publicly available tweets it is possible to build a linguistic profile to compare leaders and average citizens. We describe the linguistic analysis of 330,000 tweets collected from 221 Ecuadorian tweeters classified into three different profiles: political leaders, leaders' followers, and average local users. We build a feature vector for each user's tweets using 12 psychological dimensions included in the LIWC (Linguistic Inquiry Word Count) text analysis software and compare users with different profiles using those vectors. Our findings show that the leaders group exhibits a different linguistic profile from the others two groups: around 30% of leader followers are similar to at least one leader while just 19% of average local users are similar to at least one leader. Furthermore, the results of our analysis allows to determine whether local users have some similar characteristics of language uses on social networks of political leaders' followers without relying on critical discourse analysis.","PeriodicalId":6480,"journal":{"name":"2016 IEEE Ecuador Technical Chapters Meeting (ETCM)","volume":"103 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2016-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77847240","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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