Pub Date : 2017-08-01DOI: 10.1109/INTERCON.2017.8079701
Luis F. Castillo, C. Raymundo, Francisco Domínguez Mateos
The research revealed the need to design an information architecture model for Data Governance initiative that can serve as an intercom between current IT / IS management trends: Information technology (IT) management and information management. A model is needed that strikes a balance between the need to invest in technology and the ability to manage the information that originates from the use of those technologies, as well as to measure with greater precision the generation of IT value through the use of quality information and user satisfaction, using the technologies that make it possible for the information to reach them to be used in their daily work.
{"title":"Information architecture model for the successful data governance initiative in the peruvian higher education sector","authors":"Luis F. Castillo, C. Raymundo, Francisco Domínguez Mateos","doi":"10.1109/INTERCON.2017.8079701","DOIUrl":"https://doi.org/10.1109/INTERCON.2017.8079701","url":null,"abstract":"The research revealed the need to design an information architecture model for Data Governance initiative that can serve as an intercom between current IT / IS management trends: Information technology (IT) management and information management. A model is needed that strikes a balance between the need to invest in technology and the ability to manage the information that originates from the use of those technologies, as well as to measure with greater precision the generation of IT value through the use of quality information and user satisfaction, using the technologies that make it possible for the information to reach them to be used in their daily work.","PeriodicalId":229086,"journal":{"name":"2017 IEEE XXIV International Conference on Electronics, Electrical Engineering and Computing (INTERCON)","volume":"146 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122918410","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 : 2017-08-01DOI: 10.1109/INTERCON.2017.8079659
Saúl Martínez-Díaz, Christian Alejandro Palacios-Alvarado, Saúl Martínez Chavelas
In most big cities, firearm assault is a common crime. Some state of the art research aim to recognize firearms once they were fired. However, to prevent this type of criminal behavior it is necessary to detect firearms in real time, before they are fired, and maintaining at minimum false alarms. In this paper, we propose a method to detect hand guns by using its shape and real dimensions. The proposed method is based on statistics invariant moments, image processing algorithms and a neural network classifier. To reduce processing time a GPU processor is utilized. Computer simulations show promising results.
{"title":"Accelerated pistols recognition by using a GPU device","authors":"Saúl Martínez-Díaz, Christian Alejandro Palacios-Alvarado, Saúl Martínez Chavelas","doi":"10.1109/INTERCON.2017.8079659","DOIUrl":"https://doi.org/10.1109/INTERCON.2017.8079659","url":null,"abstract":"In most big cities, firearm assault is a common crime. Some state of the art research aim to recognize firearms once they were fired. However, to prevent this type of criminal behavior it is necessary to detect firearms in real time, before they are fired, and maintaining at minimum false alarms. In this paper, we propose a method to detect hand guns by using its shape and real dimensions. The proposed method is based on statistics invariant moments, image processing algorithms and a neural network classifier. To reduce processing time a GPU processor is utilized. Computer simulations show promising results.","PeriodicalId":229086,"journal":{"name":"2017 IEEE XXIV International Conference on Electronics, Electrical Engineering and Computing (INTERCON)","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133564061","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 : 2017-08-01DOI: 10.1109/INTERCON.2017.8079645
P. Rodríguez, B. Wohlberg
Video background modeling, used to detect moving objects in digital videos, is a ubiquitous pre-processing step in computer vision applications. Principal Component Pursuit (PCP) PCP is among the leading methods for this problem. In this paper we proposed a new convex formulation for PCP, substituting the standard ℓ1 regularization with a projection onto the ℓ1-ball. This formulation offers an advantage over the known incremental PCP methods in practical parameter selection and ghosting suppression, while retaining the ability to be implemented in a fully incremental fashion, keeping all the desired properties related to such PCP methods (low memory footprint, adaptation to changes in the background, computational complexity that allows online processing).
{"title":"An incremental principal component pursuit algorithm via projections onto the ℓ1 ball","authors":"P. Rodríguez, B. Wohlberg","doi":"10.1109/INTERCON.2017.8079645","DOIUrl":"https://doi.org/10.1109/INTERCON.2017.8079645","url":null,"abstract":"Video background modeling, used to detect moving objects in digital videos, is a ubiquitous pre-processing step in computer vision applications. Principal Component Pursuit (PCP) PCP is among the leading methods for this problem. In this paper we proposed a new convex formulation for PCP, substituting the standard ℓ1 regularization with a projection onto the ℓ1-ball. This formulation offers an advantage over the known incremental PCP methods in practical parameter selection and ghosting suppression, while retaining the ability to be implemented in a fully incremental fashion, keeping all the desired properties related to such PCP methods (low memory footprint, adaptation to changes in the background, computational complexity that allows online processing).","PeriodicalId":229086,"journal":{"name":"2017 IEEE XXIV International Conference on Electronics, Electrical Engineering and Computing (INTERCON)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133604360","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 : 2017-08-01DOI: 10.1109/INTERCON.2017.8079664
Juan Bravo, E. P. Herrera, Daniel Sierra
In this paper, a comparison of IMU-based step length and heading estimation methods for indoor environments is presented. We compared two step detection methods: detecting the stance phase in each stride and detecting negative peaks in the horizontal acceleration filtered signal. Likewise, three step length estimation methods were compared: Zero Velocity Update (ZUPT), step frequency-based and step length parameter-based. Finally, the comparison of two heading estimation methods is presented: Heuristic Heading Reduction (HHR) and Zero Angular Rate update (ZARU). The yaw obtained from the sensor was corrected and compared with both heading estimation methods. All methods were tested at high, normal and low walking frequencies. Both step detections methods showed a good performance at normal and high step frequencies. The step length estimation method that depend of a linear parameter presented an error of 0.3m in a route of 96m and was the one with lowest error. The yaw corrected presents the lowest error of 3° in turns of 90°.
{"title":"Comparison of step length and heading estimation methods for indoor environments","authors":"Juan Bravo, E. P. Herrera, Daniel Sierra","doi":"10.1109/INTERCON.2017.8079664","DOIUrl":"https://doi.org/10.1109/INTERCON.2017.8079664","url":null,"abstract":"In this paper, a comparison of IMU-based step length and heading estimation methods for indoor environments is presented. We compared two step detection methods: detecting the stance phase in each stride and detecting negative peaks in the horizontal acceleration filtered signal. Likewise, three step length estimation methods were compared: Zero Velocity Update (ZUPT), step frequency-based and step length parameter-based. Finally, the comparison of two heading estimation methods is presented: Heuristic Heading Reduction (HHR) and Zero Angular Rate update (ZARU). The yaw obtained from the sensor was corrected and compared with both heading estimation methods. All methods were tested at high, normal and low walking frequencies. Both step detections methods showed a good performance at normal and high step frequencies. The step length estimation method that depend of a linear parameter presented an error of 0.3m in a route of 96m and was the one with lowest error. The yaw corrected presents the lowest error of 3° in turns of 90°.","PeriodicalId":229086,"journal":{"name":"2017 IEEE XXIV International Conference on Electronics, Electrical Engineering and Computing (INTERCON)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125650458","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 : 2017-08-01DOI: 10.1109/INTERCON.2017.8079700
J. Apaza, D. Scipión, Diego A. Lume, Carlos Saito
The development of Unmanned Aerial Vehicles (UAVs) has gained importance over the last few years due to the innovations brought to farming, architecture, and/or medicine. A novel field where they have been used is volcanology for its long-distance control and the possibility to add multiple sensors for sensing volcano parameters. Two UAVs will be constructed: a multi-rotor (quadcopter) and a fix wing airplane for studying the most active volcano in Peru, the Ubinas. The objective is to get important and useful volcano data without risking the lives of researchers. The quadcopter will be used for image capturing and video recording of the plume, while the airplane will fly close or through to the volcanic plume measuring temperature, humidity, carbon dioxide, sulfuric dioxide, and hydrogen sulfide.
{"title":"Development of two UAVs for volcano studies in southern peru","authors":"J. Apaza, D. Scipión, Diego A. Lume, Carlos Saito","doi":"10.1109/INTERCON.2017.8079700","DOIUrl":"https://doi.org/10.1109/INTERCON.2017.8079700","url":null,"abstract":"The development of Unmanned Aerial Vehicles (UAVs) has gained importance over the last few years due to the innovations brought to farming, architecture, and/or medicine. A novel field where they have been used is volcanology for its long-distance control and the possibility to add multiple sensors for sensing volcano parameters. Two UAVs will be constructed: a multi-rotor (quadcopter) and a fix wing airplane for studying the most active volcano in Peru, the Ubinas. The objective is to get important and useful volcano data without risking the lives of researchers. The quadcopter will be used for image capturing and video recording of the plume, while the airplane will fly close or through to the volcanic plume measuring temperature, humidity, carbon dioxide, sulfuric dioxide, and hydrogen sulfide.","PeriodicalId":229086,"journal":{"name":"2017 IEEE XXIV International Conference on Electronics, Electrical Engineering and Computing (INTERCON)","volume":"921 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133108295","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 : 2017-08-01DOI: 10.1109/INTERCON.2017.8079691
Adriano da Silva Ferreira, H. Figueroa
In this work, a high-level computational environment has been developed for the MIT Electromagnetic Equation Propagation (MEEP) software. Pre-processing and post-processing features have been implemented through the Visualization Toolkit (VTK) framework, in order to provide new graphical features for MEEP. An interactive user interface is available to make a scripting-free MEEP usage. Software engineering techniques have been employed in order to provide a reusable, maintainable, extendable, and integrable software system. Tests show an elaborate electromagnetic simulation scenario in the pre-processing stage, as well as bi-dimensional movies and interactive three-dimensional plan cuts in the post-processing phase.
{"title":"Development of a computational environment for MIT electromagnetic equation propagation simulator","authors":"Adriano da Silva Ferreira, H. Figueroa","doi":"10.1109/INTERCON.2017.8079691","DOIUrl":"https://doi.org/10.1109/INTERCON.2017.8079691","url":null,"abstract":"In this work, a high-level computational environment has been developed for the MIT Electromagnetic Equation Propagation (MEEP) software. Pre-processing and post-processing features have been implemented through the Visualization Toolkit (VTK) framework, in order to provide new graphical features for MEEP. An interactive user interface is available to make a scripting-free MEEP usage. Software engineering techniques have been employed in order to provide a reusable, maintainable, extendable, and integrable software system. Tests show an elaborate electromagnetic simulation scenario in the pre-processing stage, as well as bi-dimensional movies and interactive three-dimensional plan cuts in the post-processing phase.","PeriodicalId":229086,"journal":{"name":"2017 IEEE XXIV International Conference on Electronics, Electrical Engineering and Computing (INTERCON)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122044276","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 : 2017-08-01DOI: 10.1109/INTERCON.2017.8079653
Pablo Vela, C. Valenzuela, J. Espinoza
This work provides the guidelines to calculate the size of the DC-link capacitor to contribute with additional energy - for a short period of time - than the photovoltaic panel can supply under normal operating conditions. First, a model of a three-phase electric generation system is used that combines photovoltaic panels and an inverter with an LCL filter at network side. In addition, a control algorithm capable of exchanging between two operating modes is implemented. Indeed, the first one is generated by the MPPT and the second one is generated when the grid demands more energy than the photovoltaic panel can generate. The results show that the PV system can provide additional energy - for a short period of time - from the dc link as emulating a large rotating inertia. The results are shown through simulations under standard test conditions (STC).
{"title":"Using the DC-link capacitor as a rotating inertia in a three phase PV system","authors":"Pablo Vela, C. Valenzuela, J. Espinoza","doi":"10.1109/INTERCON.2017.8079653","DOIUrl":"https://doi.org/10.1109/INTERCON.2017.8079653","url":null,"abstract":"This work provides the guidelines to calculate the size of the DC-link capacitor to contribute with additional energy - for a short period of time - than the photovoltaic panel can supply under normal operating conditions. First, a model of a three-phase electric generation system is used that combines photovoltaic panels and an inverter with an LCL filter at network side. In addition, a control algorithm capable of exchanging between two operating modes is implemented. Indeed, the first one is generated by the MPPT and the second one is generated when the grid demands more energy than the photovoltaic panel can generate. The results show that the PV system can provide additional energy - for a short period of time - from the dc link as emulating a large rotating inertia. The results are shown through simulations under standard test conditions (STC).","PeriodicalId":229086,"journal":{"name":"2017 IEEE XXIV International Conference on Electronics, Electrical Engineering and Computing (INTERCON)","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123664182","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 : 2017-08-01DOI: 10.1109/INTERCON.2017.8079650
J. G. Calderón-Guizar, Miguel Ramrez-González, R. Castellanos-Bustamante
Oscillations are inherent to power systems and the analysis of such phenomena is a fundamental issue for understanding the dynamical behavior of power networks. Knowledge of the system natural frequencies and its associated damping ratio, is useful information for understanding the system performance after being subjected to a disturbance. Topological changes in the transmission network of electrical power systems are quite common due to operational requirements. Such changes may drastically modify both frequency and damping values of the natural oscillation modes. In this paper, identification of the dominant oscillation modes in the Mexican power system is performed using both modal analysis and time domain simulations.
{"title":"Low frequency oscillations in large power grids","authors":"J. G. Calderón-Guizar, Miguel Ramrez-González, R. Castellanos-Bustamante","doi":"10.1109/INTERCON.2017.8079650","DOIUrl":"https://doi.org/10.1109/INTERCON.2017.8079650","url":null,"abstract":"Oscillations are inherent to power systems and the analysis of such phenomena is a fundamental issue for understanding the dynamical behavior of power networks. Knowledge of the system natural frequencies and its associated damping ratio, is useful information for understanding the system performance after being subjected to a disturbance. Topological changes in the transmission network of electrical power systems are quite common due to operational requirements. Such changes may drastically modify both frequency and damping values of the natural oscillation modes. In this paper, identification of the dominant oscillation modes in the Mexican power system is performed using both modal analysis and time domain simulations.","PeriodicalId":229086,"journal":{"name":"2017 IEEE XXIV International Conference on Electronics, Electrical Engineering and Computing (INTERCON)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129637032","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 : 2017-08-01DOI: 10.1109/INTERCON.2017.8079711
Dick Carrillo, Jorge Seki
Actually many Internet of Things (IoT) applications and architectures are being deployed in order to support urban area applications, as for example smart cities. However, other important applications are being deployed in rural areas, as for example agribusiness, in which wireless connectivity is one of the most important issues because wireless broadband commercial technologies are not sustainable from the business model view. In order to attend the actual demand of rural areas, the present work proposes two study cases that optimize coverage and low energy consumption joining LTE and LoRaWAN wireless access technologies. The proposal architecture is based on an element called Intelligent Terminal (IT), which is a gateway that is composed by LTE and LoRaWAN interfaces. The first study case represents a terrestrial vehicular case and the second one represents an unmanned aerial vehicle (UAV) case. The terrestrial study case is used as a reference to get a quantified gain of using UAVs. Considering that every scenario has particularities in terrestrial relief characteristics, it was obtained coverage information of five scenarios with different radius. When the radius coverage is increased, usability of UAV becomes more important. In average, for radius equal to 45 km and an UAV height equal to 50 m the gain of using UAVs is equal to 2 times the coverage than using a terrestrial solution. Other important contribution are parameters of a linear equation that estimate the average coverage gain based on any arbitrary UAV altitude.
{"title":"Rural area deployment of internet of things connectivity: LTE and LoRaWAN case study","authors":"Dick Carrillo, Jorge Seki","doi":"10.1109/INTERCON.2017.8079711","DOIUrl":"https://doi.org/10.1109/INTERCON.2017.8079711","url":null,"abstract":"Actually many Internet of Things (IoT) applications and architectures are being deployed in order to support urban area applications, as for example smart cities. However, other important applications are being deployed in rural areas, as for example agribusiness, in which wireless connectivity is one of the most important issues because wireless broadband commercial technologies are not sustainable from the business model view. In order to attend the actual demand of rural areas, the present work proposes two study cases that optimize coverage and low energy consumption joining LTE and LoRaWAN wireless access technologies. The proposal architecture is based on an element called Intelligent Terminal (IT), which is a gateway that is composed by LTE and LoRaWAN interfaces. The first study case represents a terrestrial vehicular case and the second one represents an unmanned aerial vehicle (UAV) case. The terrestrial study case is used as a reference to get a quantified gain of using UAVs. Considering that every scenario has particularities in terrestrial relief characteristics, it was obtained coverage information of five scenarios with different radius. When the radius coverage is increased, usability of UAV becomes more important. In average, for radius equal to 45 km and an UAV height equal to 50 m the gain of using UAVs is equal to 2 times the coverage than using a terrestrial solution. Other important contribution are parameters of a linear equation that estimate the average coverage gain based on any arbitrary UAV altitude.","PeriodicalId":229086,"journal":{"name":"2017 IEEE XXIV International Conference on Electronics, Electrical Engineering and Computing (INTERCON)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130974818","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 : 2017-08-01DOI: 10.1109/INTERCON.2017.8079710
A. Bustamante, S. Inca, M. Chuchon, R. Adriano, J. Samaniego
This paper introduces a new antenna model designed to be applied to V2V communications. This antenna can be integrated easily into the automobiles infrastructure and was designed for VANET networks [1] based on LTE technology and IEEE 802.11p standard [2]. The design of this model is based on operating frequencies of these two technologies. In the design process, it was prioritized that each operating frequency had a bandwidth of at least 70MHz, since, VANET networks will use 7 channels of 10MHz [3] each to enable a reliable communication and to offer data traffic services. Moreover, an omnidirectional radiation pattern was obtained in the Fraunhofer zone, good gain and a radiation efficiency [4] close to 1 in all bands of interest, as we will be shown.
{"title":"Design of a V2V communications antenna based on LTE technology and IEEE802.11p standard","authors":"A. Bustamante, S. Inca, M. Chuchon, R. Adriano, J. Samaniego","doi":"10.1109/INTERCON.2017.8079710","DOIUrl":"https://doi.org/10.1109/INTERCON.2017.8079710","url":null,"abstract":"This paper introduces a new antenna model designed to be applied to V2V communications. This antenna can be integrated easily into the automobiles infrastructure and was designed for VANET networks [1] based on LTE technology and IEEE 802.11p standard [2]. The design of this model is based on operating frequencies of these two technologies. In the design process, it was prioritized that each operating frequency had a bandwidth of at least 70MHz, since, VANET networks will use 7 channels of 10MHz [3] each to enable a reliable communication and to offer data traffic services. Moreover, an omnidirectional radiation pattern was obtained in the Fraunhofer zone, good gain and a radiation efficiency [4] close to 1 in all bands of interest, as we will be shown.","PeriodicalId":229086,"journal":{"name":"2017 IEEE XXIV International Conference on Electronics, Electrical Engineering and Computing (INTERCON)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128526296","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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