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Passive Control Tolerant to Sensing Faults in dynamic compensation devices - SVC through a hybrid strategy 基于混合策略的动态补偿装置的被动容错控制——SVC
IF 0.2
Ingenius-Revista de Ciencia y Tecnologia Pub Date : 2022-07-02 DOI: 10.17163/ings.n28.2022.03
J. Ramírez, L. Ortiz, A. Águila
{"title":"Passive Control Tolerant to Sensing Faults in dynamic compensation devices - SVC through a hybrid strategy","authors":"J. Ramírez, L. Ortiz, A. Águila","doi":"10.17163/ings.n28.2022.03","DOIUrl":"https://doi.org/10.17163/ings.n28.2022.03","url":null,"abstract":"For this research, a passive fault tolerant control system is developed for a static reactive compensator coupled to a microgrid in connected mode, oriented to those faults that result as a consequence of common damages in their sensing systems. The proposed method uses a robust optimal controller by H and artificial neural networks as a nonlinear estimation method. Simulations, validation, plant identification and controller design are carried out using a microgrid Benchmark system, programmed in Matlab/Simulink. The research shows valuable results such as: the improvement in the reliability and resilience of static compensators against sensing failures, improvements in the behavior of the output signal of the static compensator controller exposed to sensing failures and the decrease in error with respect to classic controller.","PeriodicalId":53899,"journal":{"name":"Ingenius-Revista de Ciencia y Tecnologia","volume":"16 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2022-07-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81213020","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}
引用次数: 2
Plataforma de enseñanza a distancia de microcontroladores e internet de las cosas 微控制器和物联网远程学习平台
IF 0.2
Ingenius-Revista de Ciencia y Tecnologia Pub Date : 2022-07-01 DOI: 10.17163/ings.n28.2022.05
Renata Pereira, Cleonilson De Souza, Darwin Patiño, J. Lata
{"title":"Plataforma de enseñanza a distancia de microcontroladores e internet de las cosas","authors":"Renata Pereira, Cleonilson De Souza, Darwin Patiño, J. Lata","doi":"10.17163/ings.n28.2022.05","DOIUrl":"https://doi.org/10.17163/ings.n28.2022.05","url":null,"abstract":"Debido al creciente desarrollo tecnológico de los sistemas embebidos y el internet de las cosas (IoT), los dispositivos basados en microcontroladores se aplican cada vez más en diversas áreas del conocimiento. En este contexto, las plataformas y productos educativos online se consideran laboratorios virtuales remotos, ya que los estudiantes pueden acceder a los dispositivos físicos en cualquier lugar siempre que dispongan de un sistema informático conectado a internet. En este sentido, este trabajo describe el diseño y desarrollo de una plataforma con cuatro productos educativos online para la enseñanza de microcontroladores y IoT. Estos productos educativos están basados en software de código abierto, lo que permite su distribución gratuita en línea y se puede acceder a ellos desde un servidor en la nube. El enfoque de código abierto y multiplataforma (Linux, Windows® y Mac OSX) permite una mayor interacción y accesibilidad del usuario. Los productos educativos en línea hacen posible la programación del firmware de ESP32 de forma remota a través de OTA (over the air) y de sistemas embebidos Linux basados en Raspberry Pi (Rpi). Además, los productos educativos en línea permiten manipular los pines a través de la interfaz gráfica de los microcontroladores ESP32 y ESP8266, así como del Rpi. Como resultado, se prueba la plataforma en línea propuesta, ejecutada en un servidor en la nube, y se validaron los cuatro productos educativos de aprendizaje a distancia y la aplicación real de microcontroladores e IoT se encuentran operativos tal como fueron diseñados.","PeriodicalId":53899,"journal":{"name":"Ingenius-Revista de Ciencia y Tecnologia","volume":"70 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83823554","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}
引用次数: 1
Location of distributed resources in rural-urban marginal power grids considering the voltage collapse prediction index 考虑电压崩溃预测指标的城乡边缘电网分布式资源定位
IF 0.2
Ingenius-Revista de Ciencia y Tecnologia Pub Date : 2022-07-01 DOI: 10.17163/ings.n28.2022.02
Ana B. Lemus, D. Carrión, E. Aguirre, Jorge W. González
{"title":"Location of distributed resources in rural-urban marginal power grids considering the voltage collapse prediction index","authors":"Ana B. Lemus, D. Carrión, E. Aguirre, Jorge W. González","doi":"10.17163/ings.n28.2022.02","DOIUrl":"https://doi.org/10.17163/ings.n28.2022.02","url":null,"abstract":"This research focuses on the georeferenced location of distributed resources, specifically the injection of active power through distributed generation. A rural-urban marginal feeder of a distribution company in Ecuador with georeferenced information was taken as a case study, which has a three-phase primary link at a medium voltage and several single-phase branches at a medium voltage of great length to supply users who are far away from the local company's network. Consequently, to analyze the behavior of the electrical network, the Cymdist software was used to perform simulations in a steady state without and with the insertion of distributed generation. For the location of the distributed generation, the voltage collapse prediction index was used as a technique for quantifying and identifying problems in the network nodes. Moreover, based on the proposed methodology, the optimal georeferencing of the sites where it is necessary to inject active power to improve the voltage profiles and reduce the voltage collapse prediction index was obtained.","PeriodicalId":53899,"journal":{"name":"Ingenius-Revista de Ciencia y Tecnologia","volume":"42 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91308791","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}
引用次数: 1
Considerations in the design of electrical substations, including the effect of potential gradient on surrounding metallic structures 变电站设计中的考虑因素，包括电位梯度对周围金属结构的影响
IF 0.2
Ingenius-Revista de Ciencia y Tecnologia Pub Date : 2022-07-01 DOI: 10.17163/ings.n28.2022.01
Wilo Chiliquinga, Pablo Robles
{"title":"Considerations in the design of electrical substations, including the effect of potential gradient on surrounding metallic structures","authors":"Wilo Chiliquinga, Pablo Robles","doi":"10.17163/ings.n28.2022.01","DOIUrl":"https://doi.org/10.17163/ings.n28.2022.01","url":null,"abstract":"For designing and studying an electrical substation grounding system [GS], a simple remote substation is considered according to the safety procedures indicated in the IEEE 80 Standard. Buried metallic materials or nearby metallic structures permanently endanger human life when electrical faults occur. Scenarios related to the design of electrical substations that consider the transfer of electrical potentials that can occur between the GS and buried metallic materials in their vicinity are presented, the behavior of potential transfer is evaluated, values of transferred voltages are calculated, and the main variables that influence the transferred voltage levels are identified. The simulations are performed with the CYMGRD software specific for GS calculations. Its analysis generates real results in the potential transfer that must be considered by the GS design engineer, which enables to avoid designing isolated substations without taking into account existing elements that may affect the substation surroundings.","PeriodicalId":53899,"journal":{"name":"Ingenius-Revista de Ciencia y Tecnologia","volume":"60 2 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90906490","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}
引用次数: 0
Análisis comparativo de confort térmico de vivienda unifamiliar en LSF frente a mampostería LSF单户住宅与砖石建筑热舒适的比较分析
IF 0.2
Ingenius-Revista de Ciencia y Tecnologia Pub Date : 2022-07-01 DOI: 10.17163/ings.n28.2022.10
Rodrigo Brito-Peña, Daniel Villa-Enderica, Esteban Zalamea-León
{"title":"Análisis comparativo de confort térmico de vivienda unifamiliar en LSF frente a mampostería","authors":"Rodrigo Brito-Peña, Daniel Villa-Enderica, Esteban Zalamea-León","doi":"10.17163/ings.n28.2022.10","DOIUrl":"https://doi.org/10.17163/ings.n28.2022.10","url":null,"abstract":"La construcción residencial en Ecuador ha crecido un 35,6 %. El sistema constructivo típico para envolvente de viviendas es de bloque de concreto o de ladrillo, la construcción en LSF (Light Steel Framing) o marcos de acero galvanizado (LSF) está en surgimiento. Para solucionar la demanda habitacional se evalúa el confort interior térmico de una de vivienda unifamiliar de dos plantas en la ciudad de Cuenca con ambos sistemas constructivos para conocer los estándares de confort que ofrecen las viviendas en concordancia con la Norma Ecuatoriana de la Construcción (NEC). La investigación se realizó con Design Builder y Therm donde se analizan los parámetros que influyen en el desempeño energético de las viviendas. Con las condiciones locales, el sistema predominante alcanza valores de confort térmico horario anual del 51 %, pero el sistema LSF alcanza un 62 %. Sin embargo, con estrategias de mejoramiento en la globalidad de la envolvente, el LSF alcanza el 86 %. Las variables en orden de mayor a menor influencia térmica resultaron: infiltraciones de aire, sistema constructivo de la envolvente e implantación de la vivienda. En Cuenca es posible el uso del LSF con aislamiento mínimo para alcanzar niveles aceptables de confort, siendo una alternativa adecuada a promover para edificar viviendas unifamiliares.","PeriodicalId":53899,"journal":{"name":"Ingenius-Revista de Ciencia y Tecnologia","volume":"19 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90693955","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}
引用次数: 2
Design and validation of IoT measurement system for photovoltaic generation 光伏发电物联网测量系统的设计与验证
IF 0.2
Ingenius-Revista de Ciencia y Tecnologia Pub Date : 2022-07-01 DOI: 10.17163/ings.n28.2022.04
Thiago Angelino dos Santos, Filipe Gomes de Freitas, Diego Lima Carvalho Gonçalves, Luis M. Fernández‐Ramírez
{"title":"Design and validation of IoT measurement system for photovoltaic generation","authors":"Thiago Angelino dos Santos, Filipe Gomes de Freitas, Diego Lima Carvalho Gonçalves, Luis M. Fernández‐Ramírez","doi":"10.17163/ings.n28.2022.04","DOIUrl":"https://doi.org/10.17163/ings.n28.2022.04","url":null,"abstract":"The use of photovoltaic (PV) systems for electricity generation is constantly growing in Brazil. With the reduction in the price of PV modules and the implementation of the electric power compensation system by the power distributor, the consumer is investing in PV microgeneration to reduce the electricity bill. This article aims to develop an embedded system in the context of the Internet of Things (IoT). Having an IoT monitoring system applied to a grid-connected PV system in an educational institution helps teach concepts such as IoT and PV generation. The system is based on the ESP32 development board for acquiring DC voltage and current generated by a 1.35 kWp PV system connected to the grid and installed at the IFCE. This proposal offers a low-cost educational solution using open source and programmable hardware, which sends the data to a database in the cloud, enabling remote access worldwide. Then, using the data analysis methodology, it was possible to validate the values measured with the inverter installed with an error below 1% for the voltage and current acquired during one day. With this result, it is concluded that the designed IoT system can be used for measurement in PV systems.","PeriodicalId":53899,"journal":{"name":"Ingenius-Revista de Ciencia y Tecnologia","volume":"371 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74206039","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}
引用次数: 2
Modelo matemático de un horno resistivo para termoformado de láminas de polipropileno 聚丙烯片材热成型电阻炉的数学模型
IF 0.2
Ingenius-Revista de Ciencia y Tecnologia Pub Date : 2022-07-01 DOI: 10.17163/ings.n28.2022.08
Lidia Castro-Cepeda, José Cortés-Llanganate
{"title":"Modelo matemático de un horno resistivo para termoformado de láminas de polipropileno","authors":"Lidia Castro-Cepeda, José Cortés-Llanganate","doi":"10.17163/ings.n28.2022.08","DOIUrl":"https://doi.org/10.17163/ings.n28.2022.08","url":null,"abstract":"En el presente trabajo se desarrolla un modelo matemático de un horno resistivo para la producción de planchas termoformadas, localizado en una planta de producción de la ciudad de Riobamba. El objetivo de la investigación es conseguir la estabilidad de la temperatura y que, al pasar por el proceso de termoformado, las planchas tengan una dimensión homogénea que garantice la satisfacción del cliente. Para ello se analizan las variables físicas que rigen los fenómenos de transferencia de calor; radiación, convención y conducción, y así obtener un modelo matemático que prediga el perfil de temperatura del horno en el proceso de termoformado, a partir del cual se diseña un controlador utilizando varias técnicas de control que se acoplen al sistema de forma eficiente. En la primera etapa de la investigación se plantea un estudio teórico de los fenómenos físicos y las ecuaciones matemáticas que los representan. Luego son resueltas a través de técnicas computacionales usando Simulink para conseguir el perfil de temperatura. Por último, se valida este modelo comparándolo con aquellos ya obtenidos en trabajos anteriores a través de técnicas estadísticas; finalmente, se propone un nuevo controlador que garantice la variabilidad mínima de la temperatura. Como resultado de la simulación se consigue una variación de ±1 mm del ancho de la plancha.","PeriodicalId":53899,"journal":{"name":"Ingenius-Revista de Ciencia y Tecnologia","volume":"25 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88568787","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}
引用次数: 0
Structural and Modal Analysis Of Adapter Plates For Hydraulic Hammers And Skid Steers Under Real Work Condition 液压锤和滑橇转向器接头板在实际工况下的结构与模态分析
IF 0.2
Ingenius-Revista de Ciencia y Tecnologia Pub Date : 2022-07-01 DOI: 10.17163/ings.n28.2022.09
Yuri Villa, Trevor Vook, Jorge L. Villa, P. Carbajal, Leonardo Barrera, Max Florez
{"title":"Structural and Modal Analysis Of Adapter Plates For Hydraulic Hammers And Skid Steers Under Real Work Condition","authors":"Yuri Villa, Trevor Vook, Jorge L. Villa, P. Carbajal, Leonardo Barrera, Max Florez","doi":"10.17163/ings.n28.2022.09","DOIUrl":"https://doi.org/10.17163/ings.n28.2022.09","url":null,"abstract":"In Perú the necessity of facility projects such as gas line installation for residents has increased the demand for use of Hydraulic Hammers (HH) with Skid Steers due to the lower amount of investment needed in comparison to other packs of machinery and the versatility. The ability to interchange hydraulic hammers and buckets to complete the demolition and cleaning stages offers higher productivity than manual operations for contractors. For that reason, the virtual design software Inventor Professional was used to design a suitable adapter plate with adequate resistance and durability which has a direct impact on the structure of the hydraulic hammer and the hydraulic arm of the skid steers. Simultaneously, a basic animation was developed to explain the effect of the operation style over the hydraulic hammer and the adapter plate. Finally, for this development, the construction of an adapter plate as a fuse in the system was considered in case operators exceed the resistance capacity of the hydraulic hammer structure.","PeriodicalId":53899,"journal":{"name":"Ingenius-Revista de Ciencia y Tecnologia","volume":"53 5 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89676043","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}
引用次数: 0
Estabilidad de tensión y compensación electrónica en sistemas eléctricos de potencia usando herramientas de simulación 利用仿真工具对电力系统的电压稳定性和电子补偿进行了研究
IF 0.2
Ingenius-Revista de Ciencia y Tecnologia Pub Date : 2022-01-06 DOI: 10.17163/ings.n28.2022.07
M. Campaña, P. Masache, E. Inga, D. Carrión
{"title":"Estabilidad de tensión y compensación electrónica en sistemas eléctricos de potencia usando herramientas de simulación","authors":"M. Campaña, P. Masache, E. Inga, D. Carrión","doi":"10.17163/ings.n28.2022.07","DOIUrl":"https://doi.org/10.17163/ings.n28.2022.07","url":null,"abstract":"El aumento de la demanda en los distintos sistemas eléctricos de potencia (SEP) tiene un impacto negativo en la estabilidad de la tensión, la confiabilidad y la calidad del suministro eléctrico. El perfil de tensión disminuye cuando las unidades de generación no son capaces de suministrar potencia reactiva al sistema eléctrico en los momentos que se requiere. Con el desarrollo de la electrónica de potencia y los complejos sistemas de control, se han podido introducir dispositivos de sistemas flexibles de transmisión de corriente alterna (FACTS, del inglés Flexible Alternating Current Transmission System). En este artículo se analiza en detalle el impacto que genera la introducción de un tipo de FACTS que permite la compensación de potencia reactiva en el SEP. Además, se analizará una metodología para decidir la capacidad del compensador síncrono estático (STATCOM, del inglés Static Synchronous Compensator) y su ubicación óptima con la ejecución de flujos de potencia continuos (FPC). Finalmente, se estudiará el impacto positivo de la instalación de un control estabilizador de potencia (PSS, del inglés Power System Stabilizer) para asegurar la estabilidad de tensión en el SEP. Este artículo se desarrolla utilizando el sistema base IEEE de 14 barras bajo dos modelos matemáticos para el cálculo del flujo de potencia desarrollados en el software Matlab, que son: i) utilizando las ecuaciones de balance de potencia y ii) Newton Raphson con el textit{toolbox} de MATLAB (PSAT, del inglés Power System Analysis Toolbox).","PeriodicalId":53899,"journal":{"name":"Ingenius-Revista de Ciencia y Tecnologia","volume":"111 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2022-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80624689","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}
引用次数: 5
Characterization of DELUX: Ultraviolet light sterilization device for PFF2 / N95 masks against COVID-19 DELUX: PFF2 / N95口罩抗COVID-19紫外线灭菌装置的研制
IF 0.2
Ingenius-Revista de Ciencia y Tecnologia Pub Date : 2022-01-01 DOI: 10.17163/ings.n27.2022.03
C. B. Lombello, N. Daghastanli, Hermann Windisch Neto, F. Fonseca, F. N. Ambrosio, Raquel Arbex, Isabella Kobb Fernando, Victor Allisson da Silva, Luisa Pataquini dos Santos, Patricia Aparecida da Ana
{"title":"Characterization of DELUX: Ultraviolet light sterilization device for PFF2 / N95 masks against COVID-19","authors":"C. B. Lombello, N. Daghastanli, Hermann Windisch Neto, F. Fonseca, F. N. Ambrosio, Raquel Arbex, Isabella Kobb Fernando, Victor Allisson da Silva, Luisa Pataquini dos Santos, Patricia Aparecida da Ana","doi":"10.17163/ings.n27.2022.03","DOIUrl":"https://doi.org/10.17163/ings.n27.2022.03","url":null,"abstract":"The World Health Organization (WHO) has declared a public health pandemic state due to the trans-mission of the new coronavirus on March 11th, 2020. COVID-19, that is caused by SARS-CoV-2, has a very broad clinical spectrum, with predominantly respiratory symptoms developments. The role of the health professionals in fighting the pandemic requires the use of Personal Protective Equipment (PPE). PFF2 / N95 masks are suitable PPEs for this purpose. Due to the high demand for PFF2 / N95 masks to fight the pandemic, there was a shortage of this PPE world-wide. This work aims to present a characterization of the device called DELUX, utilized for UVC (ultra-violet C light spectra) sterilization of PFF2 / N95 masks, and allowing to extend the time of safe use of this PPE in emergency conditions. The photometric validation of the device resulted in the verification of the emission spectrum of the lamps used in the device, and the measurement of the optical power, demonstrating the adequacy of irradiation with UVC light, with a 15-minute cycle, and safely. Biological validation showed that DELUX is capable of inacti-vating SARS-CoV-2 present on the surface of PFF2 / N95 masks, thus being efficient for their sterilization. The safety offered by the sterilization cycle allows to extend the safe use of those masks. © 2022, Universidad Politecnica Salesiana. All rights reserved.","PeriodicalId":53899,"journal":{"name":"Ingenius-Revista de Ciencia y Tecnologia","volume":"17 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75383512","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}
引用次数: 0
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