Pub Date : 2018-10-01DOI: 10.1109/ETCM.2018.8580285
H. Cevallos, Gabriel Intriago, D. Plaza
The state estimation (SE) and the load flow (LF) are critical subjects in the analysis and management of electrical power systems (EPS). This article provides a solution for dynamic state estimation (DSE) in EPS based in the Particle Filter (PF) and the Extended Kalman Filter (EKF) that uses the Holt method to linearize the process model. The performance of the methods was analyzed through the comparison of the results considering the error index (ε). In this work, an IEEE 14 and 30 buses test cases were utilized. The results show that the PF method has better accuracy than the EKF method.
{"title":"The Extended Kalman Filter and the Particle Filter in the Dynamic State Estimation of Electrical Power Systems","authors":"H. Cevallos, Gabriel Intriago, D. Plaza","doi":"10.1109/ETCM.2018.8580285","DOIUrl":"https://doi.org/10.1109/ETCM.2018.8580285","url":null,"abstract":"The state estimation (SE) and the load flow (LF) are critical subjects in the analysis and management of electrical power systems (EPS). This article provides a solution for dynamic state estimation (DSE) in EPS based in the Particle Filter (PF) and the Extended Kalman Filter (EKF) that uses the Holt method to linearize the process model. The performance of the methods was analyzed through the comparison of the results considering the error index (ε). In this work, an IEEE 14 and 30 buses test cases were utilized. The results show that the PF method has better accuracy than the EKF method.","PeriodicalId":334574,"journal":{"name":"2018 IEEE Third Ecuador Technical Chapters Meeting (ETCM)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115209072","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 : 2018-10-01DOI: 10.1109/ETCM.2018.8580273
J. Rengifo, J. Romero, J. Aller
This paper presents an evaluation of the effects of variable frequency drives (VFDs) on induction machines efficiency. For this purpose, an experimental evaluation using international standards IEEE 112, IEC 60034-2-1 and IEC 60034-2-3 (draft version), was set up. These standards estimated the induction machine’s efficiency based on a loss segregation approach to consider the stator, core, friction, rotor, stray-load, and additional losses contribution. Additionally, the machine’s losses were studied using a time-stepping, 2D, Finite Element Method (FEM) analysis on the open-source software Gmsh–GetDP. This analysis used voltage waveforms suggested by IEC 60034-2-3 and a motor design with the same rated characteristics to those used in the experimental stage.
{"title":"Efficiency Evaluation of Induction Motors Supplied by VFDs","authors":"J. Rengifo, J. Romero, J. Aller","doi":"10.1109/ETCM.2018.8580273","DOIUrl":"https://doi.org/10.1109/ETCM.2018.8580273","url":null,"abstract":"This paper presents an evaluation of the effects of variable frequency drives (VFDs) on induction machines efficiency. For this purpose, an experimental evaluation using international standards IEEE 112, IEC 60034-2-1 and IEC 60034-2-3 (draft version), was set up. These standards estimated the induction machine’s efficiency based on a loss segregation approach to consider the stator, core, friction, rotor, stray-load, and additional losses contribution. Additionally, the machine’s losses were studied using a time-stepping, 2D, Finite Element Method (FEM) analysis on the open-source software Gmsh–GetDP. This analysis used voltage waveforms suggested by IEC 60034-2-3 and a motor design with the same rated characteristics to those used in the experimental stage.","PeriodicalId":334574,"journal":{"name":"2018 IEEE Third Ecuador Technical Chapters Meeting (ETCM)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123892170","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 : 2018-10-01DOI: 10.1109/ETCM.2018.8580333
Eduardo Alcivar-Molina, Jorge Hurel, Efrain Teran, Geancarlos Zamora-Olea, R. Ponguillo, Francis R. Loayza
One of the pressing problems in people with motor disabilities in Ecuador is the high impact of this phenomenon, which is influenced by poverty and social marginalization. Currently, research and technological development aims at the applications of robotic devices for therapeutic and rehabilitation purposes, areas with little development in this country. This article presents the design of a control system for an exoskeleton, to assist in rehabilitation processes for children with partial or total lower limb motor disability. The device, adaptable to the different anatomies of patients, has a control and data acquisition system that allows its operation either directly by the user or externally by a physiotherapist.
{"title":"Six-axis lower-limb exoskeleton control system based on Neural Networks","authors":"Eduardo Alcivar-Molina, Jorge Hurel, Efrain Teran, Geancarlos Zamora-Olea, R. Ponguillo, Francis R. Loayza","doi":"10.1109/ETCM.2018.8580333","DOIUrl":"https://doi.org/10.1109/ETCM.2018.8580333","url":null,"abstract":"One of the pressing problems in people with motor disabilities in Ecuador is the high impact of this phenomenon, which is influenced by poverty and social marginalization. Currently, research and technological development aims at the applications of robotic devices for therapeutic and rehabilitation purposes, areas with little development in this country. This article presents the design of a control system for an exoskeleton, to assist in rehabilitation processes for children with partial or total lower limb motor disability. The device, adaptable to the different anatomies of patients, has a control and data acquisition system that allows its operation either directly by the user or externally by a physiotherapist.","PeriodicalId":334574,"journal":{"name":"2018 IEEE Third Ecuador Technical Chapters Meeting (ETCM)","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124425805","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 : 2018-10-01DOI: 10.1109/ETCM.2018.8580288
D. Cipriano, J. Rengifo, J. Aller
This paper presents the study of the effect of increasing the penetration of Doubly Fed Induction Generators (DFIG) in the transient stability performance of a power system using a detailed model of the DFIG including the back to back converter that uses Direct Torque Control (DTC) and Direct Power Control (DPC) on the machine- and grid-side inverters respectively. The wind turbine model includes the relation between the power coefficient, the tip speed ratio, and the pitch angle, and a Maximum Power Point Tracking (MPPT) strategy to define the torque reference. The stability analysis evaluated the critical clearance time (CCT) of three-phase faults in the 9-bus IEEE power system considering different levels of wind power penetration. Additionally, a wind turbine with a squirrel cage induction generator (SQIG), and synchronous generator cases were simulated as comparison patterns. Furthermore, to evaluate the power system transient performance with high penetration of DFIG generation, the Transient Stability Index (TSI) and the Transient Rotor Angle Severity Index (TRASI) were calculated and compared.
{"title":"Transient stability evaluation of high penetration of DFIG controlled by DTC and DPC into power systems","authors":"D. Cipriano, J. Rengifo, J. Aller","doi":"10.1109/ETCM.2018.8580288","DOIUrl":"https://doi.org/10.1109/ETCM.2018.8580288","url":null,"abstract":"This paper presents the study of the effect of increasing the penetration of Doubly Fed Induction Generators (DFIG) in the transient stability performance of a power system using a detailed model of the DFIG including the back to back converter that uses Direct Torque Control (DTC) and Direct Power Control (DPC) on the machine- and grid-side inverters respectively. The wind turbine model includes the relation between the power coefficient, the tip speed ratio, and the pitch angle, and a Maximum Power Point Tracking (MPPT) strategy to define the torque reference. The stability analysis evaluated the critical clearance time (CCT) of three-phase faults in the 9-bus IEEE power system considering different levels of wind power penetration. Additionally, a wind turbine with a squirrel cage induction generator (SQIG), and synchronous generator cases were simulated as comparison patterns. Furthermore, to evaluate the power system transient performance with high penetration of DFIG generation, the Transient Stability Index (TSI) and the Transient Rotor Angle Severity Index (TRASI) were calculated and compared.","PeriodicalId":334574,"journal":{"name":"2018 IEEE Third Ecuador Technical Chapters Meeting (ETCM)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116488134","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 : 2018-10-01DOI: 10.1109/ETCM.2018.8580275
Walter Verdugo-Romero, Luis González-Delgado, Erwin J. Sacoto-Cabrera, Alexandra Verdugo-Cabrera, Oswaldo Verdugo-Cabrera
The speed fluctuation of a vehicle has a significant impact on the traffic, road safety, fuel consumption and emission of exhaust gases. Thus, in this research it is proposed an improved model with realistic speed for a lane based on two typical models of microscopic vehicular traffic with Cellular Automata proposed by Nagel and Schreckenberg (NaSch) and the car-following models. Furthermore, this model expose the vehicle speed fluctuation of either one or any vehicles. Finally, after perform the respective simulations implementing this model, it is presented the fundamental diagrams reproducing some phenomena that the model is able to exhibit.
{"title":"Mathematical and statistical analysis for the simulation of the vehicular flow in a specific sector of the city of Cuenca-Ecuador","authors":"Walter Verdugo-Romero, Luis González-Delgado, Erwin J. Sacoto-Cabrera, Alexandra Verdugo-Cabrera, Oswaldo Verdugo-Cabrera","doi":"10.1109/ETCM.2018.8580275","DOIUrl":"https://doi.org/10.1109/ETCM.2018.8580275","url":null,"abstract":"The speed fluctuation of a vehicle has a significant impact on the traffic, road safety, fuel consumption and emission of exhaust gases. Thus, in this research it is proposed an improved model with realistic speed for a lane based on two typical models of microscopic vehicular traffic with Cellular Automata proposed by Nagel and Schreckenberg (NaSch) and the car-following models. Furthermore, this model expose the vehicle speed fluctuation of either one or any vehicles. Finally, after perform the respective simulations implementing this model, it is presented the fundamental diagrams reproducing some phenomena that the model is able to exhibit.","PeriodicalId":334574,"journal":{"name":"2018 IEEE Third Ecuador Technical Chapters Meeting (ETCM)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122804424","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 : 2018-10-01DOI: 10.1109/ETCM.2018.8580307
F. Chacha, C. Punin, B. Barzallo, M. Huerta, J. Bermeo
This work proposes an alternative for functional rehabilitation in older adults, they are losing their skills motors as psychological cause their age, so in this paper videogame-based systems were designed for functional rehabilitation for upper limbs in older adults. The systems have hardware y software, where software was designed in C language and the Unity for Android platform. The aim of this work is give rise to older adults play with funny videogames while they are working with upper limbs as functional rehabilitation through the execution of pronosupination and flexo extension exercises. 55 people participated in the tests (49 without Neurodegenerative Diseases ND and 6 with Parkinson’s Disease PD), so Chi-square goodness of fit test about improvement of rehabilitation was made between older adults, advanced age and elderly for ND and PD, where the results showed that the recovery progression is the same to people without ND and people with PD.
{"title":"Use of videogames for functional rehabilitation dynamic for upper limbs in older adults, advanced age and elderly","authors":"F. Chacha, C. Punin, B. Barzallo, M. Huerta, J. Bermeo","doi":"10.1109/ETCM.2018.8580307","DOIUrl":"https://doi.org/10.1109/ETCM.2018.8580307","url":null,"abstract":"This work proposes an alternative for functional rehabilitation in older adults, they are losing their skills motors as psychological cause their age, so in this paper videogame-based systems were designed for functional rehabilitation for upper limbs in older adults. The systems have hardware y software, where software was designed in C language and the Unity for Android platform. The aim of this work is give rise to older adults play with funny videogames while they are working with upper limbs as functional rehabilitation through the execution of pronosupination and flexo extension exercises. 55 people participated in the tests (49 without Neurodegenerative Diseases ND and 6 with Parkinson’s Disease PD), so Chi-square goodness of fit test about improvement of rehabilitation was made between older adults, advanced age and elderly for ND and PD, where the results showed that the recovery progression is the same to people without ND and people with PD.","PeriodicalId":334574,"journal":{"name":"2018 IEEE Third Ecuador Technical Chapters Meeting (ETCM)","volume":"229 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120976761","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 : 2018-10-01DOI: 10.1109/ETCM.2018.8580295
Guadalupe Martínez Mena, Elvira Martínez de Icaya Gómez, E. Izquierdo
The objective of this study is to detect drought changes through the use of normalized difference drought index NDDI. It is applied to Urmia Lake and the data is downloaded from the Landsat 8 satellite with its sensor OLI/TIRS. Therefore, for a local analysis it can be thought as data with greater spatial resolution, as Landsat. The traditional spectral indices, such as a the NDVI, NDWI were utilized to calculate spectral index NDDI; Urmia Lake-Iran was chosen as a study area using a set of multiband scenes from the years (2013 – 2016) of Landsat 8 OLI/TIRS, with the purpose of obtaining maps of drought and thus faciliting an analysis of research that can add to the decision-making and implement plans of action.
{"title":"New Proposals for the monitoring of Water Resources (Smartwater)","authors":"Guadalupe Martínez Mena, Elvira Martínez de Icaya Gómez, E. Izquierdo","doi":"10.1109/ETCM.2018.8580295","DOIUrl":"https://doi.org/10.1109/ETCM.2018.8580295","url":null,"abstract":"The objective of this study is to detect drought changes through the use of normalized difference drought index NDDI. It is applied to Urmia Lake and the data is downloaded from the Landsat 8 satellite with its sensor OLI/TIRS. Therefore, for a local analysis it can be thought as data with greater spatial resolution, as Landsat. The traditional spectral indices, such as a the NDVI, NDWI were utilized to calculate spectral index NDDI; Urmia Lake-Iran was chosen as a study area using a set of multiband scenes from the years (2013 – 2016) of Landsat 8 OLI/TIRS, with the purpose of obtaining maps of drought and thus faciliting an analysis of research that can add to the decision-making and implement plans of action.","PeriodicalId":334574,"journal":{"name":"2018 IEEE Third Ecuador Technical Chapters Meeting (ETCM)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127494301","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 : 2018-10-01DOI: 10.1109/ETCM.2018.8580268
P. Rosero-Montalvo, Pamela E. Godoy-Trujillo, Edison Flores-Bosmediano, Jorge Carrascal-García, Santiago Otero-Potosi, Henry Benitez-Pereira, Diego Hernán Peluffo-Ordóñez
We present an intelligent electronic glove system able to detect numbers of sign language in order to automate the process of communication between a deaf-mute person and others. This is done by translating the hands move sign language into an oral language. The system is inside to a glove with flex sensors in each finger that we are used to collect data that are analyzed through a methodology involving the following stages: (i) Data balancing with the Kennard-Stone (KS), (ii) Comparison of prototypes selection between CHC evolutionary Algorithm and Decremental Reduction Optimization Procedure 3 (DROP3) to define the best one. Subsequently, the K-Nearest Neighbors (kNN) as classifier (iii) is implemented. As a result, the amount of data reduced from stage (i) from storage within the system is 98%. Also, a classification performance of 85% is achieved with CHC evolutionary algorithm.
{"title":"Sign Language Recognition Based on Intelligent Glove Using Machine Learning Techniques","authors":"P. Rosero-Montalvo, Pamela E. Godoy-Trujillo, Edison Flores-Bosmediano, Jorge Carrascal-García, Santiago Otero-Potosi, Henry Benitez-Pereira, Diego Hernán Peluffo-Ordóñez","doi":"10.1109/ETCM.2018.8580268","DOIUrl":"https://doi.org/10.1109/ETCM.2018.8580268","url":null,"abstract":"We present an intelligent electronic glove system able to detect numbers of sign language in order to automate the process of communication between a deaf-mute person and others. This is done by translating the hands move sign language into an oral language. The system is inside to a glove with flex sensors in each finger that we are used to collect data that are analyzed through a methodology involving the following stages: (i) Data balancing with the Kennard-Stone (KS), (ii) Comparison of prototypes selection between CHC evolutionary Algorithm and Decremental Reduction Optimization Procedure 3 (DROP3) to define the best one. Subsequently, the K-Nearest Neighbors (kNN) as classifier (iii) is implemented. As a result, the amount of data reduced from stage (i) from storage within the system is 98%. Also, a classification performance of 85% is achieved with CHC evolutionary algorithm.","PeriodicalId":334574,"journal":{"name":"2018 IEEE Third Ecuador Technical Chapters Meeting (ETCM)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114901254","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 : 2018-10-01DOI: 10.1109/ETCM.2018.8580298
Milton N. Tipan, Arguero T. Berenice, G. Arévalo
A single wavelength optical access network with jointly GFDM and LTE signal was tested. The LTE was centered at a frequency of 1.5 GHz while GFDM was left at baseband. The LTE RF power was optimized for properly recovering the GFDM data. IM/DD format was employed for reduce complexity of the system. Receiver sensitivities of −29.5dBm for LTE and −24.5dBm for 4-QAM GFDM were achieved. Hence, access network convergence of LTE and GFDM could serve until 64 user at PON legacy networks.
{"title":"GFDM and LTE Data Convergence Test in Optical Access Networks","authors":"Milton N. Tipan, Arguero T. Berenice, G. Arévalo","doi":"10.1109/ETCM.2018.8580298","DOIUrl":"https://doi.org/10.1109/ETCM.2018.8580298","url":null,"abstract":"A single wavelength optical access network with jointly GFDM and LTE signal was tested. The LTE was centered at a frequency of 1.5 GHz while GFDM was left at baseband. The LTE RF power was optimized for properly recovering the GFDM data. IM/DD format was employed for reduce complexity of the system. Receiver sensitivities of −29.5dBm for LTE and −24.5dBm for 4-QAM GFDM were achieved. Hence, access network convergence of LTE and GFDM could serve until 64 user at PON legacy networks.","PeriodicalId":334574,"journal":{"name":"2018 IEEE Third Ecuador Technical Chapters Meeting (ETCM)","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124160856","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 : 2018-10-01DOI: 10.1109/ETCM.2018.8580330
Katherine Aro, N. Escobar, D. Chávez, P. Leica, O. Camacho
This document developed a fuzzy supervisory control based on fuzzy logic for a four-tank multivariable system. A hierarchical control structure was established which basic principle is to decompose and coordinate highly complex systems and work them as subsystems. This hierarchical system was shaped by two layers. The first was a supervisory layer, in which initially the variable with major weight was found within the process to establish a hierarchy of variables, this was calculated through the decomposition into singular values of the Hankel matrix, also, considering the behavior of the plant in face of reference changes, it was sought to retune in line the parameters of the controllers arranged in the regulatory layer, this using fuzzy logic. The regulatory layer is the one that receives the parameters, which worked with independent control loops based on the structure of PID controllers that regulated the behavior of the four-tank system.
{"title":"Decentralized control versus a Fuzzy supervisory control: A comparison in a Quadruple-Tank Process","authors":"Katherine Aro, N. Escobar, D. Chávez, P. Leica, O. Camacho","doi":"10.1109/ETCM.2018.8580330","DOIUrl":"https://doi.org/10.1109/ETCM.2018.8580330","url":null,"abstract":"This document developed a fuzzy supervisory control based on fuzzy logic for a four-tank multivariable system. A hierarchical control structure was established which basic principle is to decompose and coordinate highly complex systems and work them as subsystems. This hierarchical system was shaped by two layers. The first was a supervisory layer, in which initially the variable with major weight was found within the process to establish a hierarchy of variables, this was calculated through the decomposition into singular values of the Hankel matrix, also, considering the behavior of the plant in face of reference changes, it was sought to retune in line the parameters of the controllers arranged in the regulatory layer, this using fuzzy logic. The regulatory layer is the one that receives the parameters, which worked with independent control loops based on the structure of PID controllers that regulated the behavior of the four-tank system.","PeriodicalId":334574,"journal":{"name":"2018 IEEE Third Ecuador Technical Chapters Meeting (ETCM)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127058914","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：