The electrocardiographic signal is an electrical signal and its amplitude is 1 mV approximately and spectral components between 0.7 and 100 Hz. The electrocardiographic signal represents the electrical behavior of the human heart and it has a group of waves called the cardiac complex. Waves comprising the cardiac complex are: P, Q, R, S and T. The R-wave corresponds to the positive wave of greater amplitude of the electrocardiographic signal and the time between each wave allows the calculation of instantaneous heart rate. The calculation of the time between R wave requires implementation of a filtering system that allows an attenuation of the spectral components that do not belong to this waveform. Then proceed to a thresholding process that consists of generating a binary signal which takes the value of one in the sample that records the wave R and zero in the other samples. The principal goal of this paper is to present the results to implement an algorithm for setting the threshold based on the calculation of the histogram of the electrocardiographic signal that has been previously addressed through a system based on filter banks.
{"title":"Cálculo del umbral para detección de la onda R del complejo cardiaco","authors":"Javier E. González-Barajas","doi":"10.22430/22565337.198","DOIUrl":"https://doi.org/10.22430/22565337.198","url":null,"abstract":"The electrocardiographic signal is an electrical signal and its amplitude is 1 mV approximately and spectral components between 0.7 and 100 Hz. The electrocardiographic signal represents the electrical behavior of the human heart and it has a group of waves called the cardiac complex. Waves comprising the cardiac complex are: P, Q, R, S and T. The R-wave corresponds to the positive wave of greater amplitude of the electrocardiographic signal and the time between each wave allows the calculation of instantaneous heart rate. The calculation of the time between R wave requires implementation of a filtering system that allows an attenuation of the spectral components that do not belong to this waveform. Then proceed to a thresholding process that consists of generating a binary signal which takes the value of one in the sample that records the wave R and zero in the other samples. The principal goal of this paper is to present the results to implement an algorithm for setting the threshold based on the calculation of the histogram of the electrocardiographic signal that has been previously addressed through a system based on filter banks.","PeriodicalId":30469,"journal":{"name":"TecnoLogicas","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68484887","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}
Faisury Cardona-Guerrero, Álvaro J. Ávila-Díaz, Y. Carvajal-Escobar, Henry Jiménez-Escobar
With the goal of detecting changes or trends in registered data of daily rainfall in the basins of rivers Dagua and Cali, located in the south-west of Colombia, in the Valle del Cauca, nine climate extremes indices were calculated using the RClimDex software. For this, precipitation trends were analyzed in 18 rain gauges located in the study area with historical series ranging between 21 and 56 years. Homogeneity tests were made to data to ensure consistency in the information. The results show changes in rainfall, dominated by the increasing trends for almost all indices; however most of the trends do not show high statistical significance. Also, a significant increase in the average annual total rainfall of 15.2 mm (Dagua river basin) and 9.1 mm (Cali river basin) in the stations located below 1500 msnm was obtained. Moreover, in the stations located at higher elevations, decreases were observed. There is a homogeneous spatial distribution for the most of the indices and similar patterns were found located in defined areas of the study zone, which may affect the runoff production in watersheds in the coming years.
为了检测位于哥伦比亚西南部考卡山谷的达瓜河和卡利河流域的日降雨量的变化或趋势，使用RClimDex软件计算了9个极端气候指数。为此，利用21 ~ 56年的历史序列对研究区18个雨量计的降水趋势进行了分析。对数据进行了同质性检验，以确保信息的一致性。结果表明:降水的变化，几乎所有指数都以增加趋势为主;然而，大多数趋势并没有显示出很高的统计意义。1500 msnm以下站点的年平均总降雨量显著增加，达15.2 mm(大agua河流域)和9.1 mm (Cali河流域)。此外，在海拔较高的站点，观测到减少。大部分指数的空间分布具有均匀性，在研究区内的特定区域也有相似的分布规律，这可能会影响未来几年流域的产流。
{"title":"Tendencias en las series de precipitación en dos cuencas torrenciales andinas del Valle del Cauca (Colombia)","authors":"Faisury Cardona-Guerrero, Álvaro J. Ávila-Díaz, Y. Carvajal-Escobar, Henry Jiménez-Escobar","doi":"10.22430/22565337.208","DOIUrl":"https://doi.org/10.22430/22565337.208","url":null,"abstract":"With the goal of detecting changes or trends in registered data of daily rainfall in the basins of rivers Dagua and Cali, located in the south-west of Colombia, in the Valle del Cauca, nine climate extremes indices were calculated using the RClimDex software. For this, precipitation trends were analyzed in 18 rain gauges located in the study area with historical series ranging between 21 and 56 years. Homogeneity tests were made to data to ensure consistency in the information. The results show changes in rainfall, dominated by the increasing trends for almost all indices; however most of the trends do not show high statistical significance. Also, a significant increase in the average annual total rainfall of 15.2 mm (Dagua river basin) and 9.1 mm (Cali river basin) in the stations located below 1500 msnm was obtained. Moreover, in the stations located at higher elevations, decreases were observed. There is a homogeneous spatial distribution for the most of the indices and similar patterns were found located in defined areas of the study zone, which may affect the runoff production in watersheds in the coming years.","PeriodicalId":30469,"journal":{"name":"TecnoLogicas","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2014-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68486021","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}
Resumen es: En este trabajo se describe el procedimiento, basado en sistema de ecuaciones de nulos direccionados para calcular los pesos necesario de un arreglo de a...
摘要:本文描述了一种基于有向零方程组的计算方法，该方法基于有向零方程组来计算一个数组所需的权值。
{"title":"Algoritmo para un Patrón de Radiación Sin Lóbulos Secundarios","authors":"Oscar Cruz-Zamora, M. A. Acevedo-Mosqueda","doi":"10.22430/22565337.320","DOIUrl":"https://doi.org/10.22430/22565337.320","url":null,"abstract":"Resumen es: En este trabajo se describe el procedimiento, basado en sistema de ecuaciones de nulos direccionados para calcular los pesos necesario de un arreglo de a...","PeriodicalId":30469,"journal":{"name":"TecnoLogicas","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68490440","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}
Resumen es: El analisis y caracterizacion de sistemas de telecomunicaciones gene-ralmente se realiza utilizando modelos estocasticos, en este articulo se presentan d...
摘要:电信系统的分析和表征通常是使用随机模型进行的，本文提出了一些方法。
{"title":"Generación y Análisis de Algoritmos para el Estudio de QBDs","authors":"Ricardo Gómez-Vargas, Mónica Espinosa-Buitrago","doi":"10.22430/22565337.346","DOIUrl":"https://doi.org/10.22430/22565337.346","url":null,"abstract":"Resumen es: El analisis y caracterizacion de sistemas de telecomunicaciones gene-ralmente se realiza utilizando modelos estocasticos, en este articulo se presentan d...","PeriodicalId":30469,"journal":{"name":"TecnoLogicas","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68491177","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}
J. León, Alejandro Restrepo-Martínez, F. López-Giraldo
Resumen es: Este trabajo propone una metodologia para la descripcion de compor-tamientos mecanicos en la deformacion de una pelicula plastica termode-formable utiliz...
摘要:本文提出了一种描述热成型塑料薄膜变形机械成分的方法。
{"title":"Evolución de la Intensidad de Pixeles para Describir la Deformación de Películas Plásticas","authors":"J. León, Alejandro Restrepo-Martínez, F. López-Giraldo","doi":"10.22430/22565337.397","DOIUrl":"https://doi.org/10.22430/22565337.397","url":null,"abstract":"Resumen es: Este trabajo propone una metodologia para la descripcion de compor-tamientos mecanicos en la deformacion de una pelicula plastica termode-formable utiliz...","PeriodicalId":30469,"journal":{"name":"TecnoLogicas","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68491968","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this paper we show various configurations of photonic crystal fiber with hexagonal holes distribution for compensation of chromatic dispersion in optical communications links. The vectorial finite element method with scattering boundary condition was used for the analysis of the fibers. From these results it was estimated variation of the dispersion and the dispersion slope with respect to change in the diameter of the holes in the microstructure. With the above was possible to obtain values of dispersion in the C and L bands of telecommunications close to -850 ps / nm * km, with confinement losses 10-3 dB / km
本文介绍了光通信链路中补偿色散的六方孔光子晶体光纤的各种结构。采用带散射边界条件的矢量有限元法对光纤进行了分析。从这些结果估计了色散和色散斜率随微观结构中孔直径变化的变化。利用上述方法，可以获得电信C和L波段色散值接近-850 ps / nm * km，约束损耗为10-3 dB / km
{"title":"Compensación de Dispersión Cromática Usando Fibras de Cristal Fotónico con Distribución Hexagonal","authors":"E. Reyes-Vera, N. Gómez-Cardona","doi":"10.22430/22565337.325","DOIUrl":"https://doi.org/10.22430/22565337.325","url":null,"abstract":"In this paper we show various configurations of photonic crystal fiber with hexagonal holes distribution for compensation of chromatic dispersion in optical communications links. The vectorial finite element method with scattering boundary condition was used for the analysis of the fibers. From these results it was estimated variation of the dispersion and the dispersion slope with respect to change in the diameter of the holes in the microstructure. With the above was possible to obtain values of dispersion in the C and L bands of telecommunications close to -850 ps / nm * km, with confinement losses 10-3 dB / km","PeriodicalId":30469,"journal":{"name":"TecnoLogicas","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68490683","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}
John E. Muñoz-Cardona, Óscar A. Henao-Gallo, J. F. López-Herrera
Resumen es: El presente articulo muestra la creacion de un novedoso sistema para la rehabilitacion fisica de pacientes con multiples patologias, a traves de dinamica...
摘要:本文展示了一种新的系统的创建，为多种病理患者的物理康复，通过动态…
{"title":"Sistema de Rehabilitación basado en el Uso de Análisis Biomecánico y Videojuegos mediante el Sensor Kinect","authors":"John E. Muñoz-Cardona, Óscar A. Henao-Gallo, J. F. López-Herrera","doi":"10.22430/22565337.386","DOIUrl":"https://doi.org/10.22430/22565337.386","url":null,"abstract":"Resumen es: El presente articulo muestra la creacion de un novedoso sistema para la rehabilitacion fisica de pacientes con multiples patologias, a traves de dinamica...","PeriodicalId":30469,"journal":{"name":"TecnoLogicas","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68492398","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}
Omar D. Hernández-Arboleda, Paula A. Ortiz-Valencia, J. A. Herrera-Cuartas
Resumen es: En este articulo se presenta el diseno de un controlador robusto para un horno rotativo. El controlador disenado es una combinacion de un PID fraccionari...
本文介绍了一种旋转炉的鲁棒控制器的设计。所设计的控制器是一个分数PID的组合…
{"title":"Diseño de Controlador Robusto para Horno Rotatorio","authors":"Omar D. Hernández-Arboleda, Paula A. Ortiz-Valencia, J. A. Herrera-Cuartas","doi":"10.22430/22565337.334","DOIUrl":"https://doi.org/10.22430/22565337.334","url":null,"abstract":"Resumen es: En este articulo se presenta el diseno de un controlador robusto para un horno rotativo. El controlador disenado es una combinacion de un PID fraccionari...","PeriodicalId":30469,"journal":{"name":"TecnoLogicas","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68490524","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}
Carlos Andrés Ramos-Paja, Adriana Trejos-Grajales, Bonie J. Restrepo-Cuestas
This paper proposes a new method to accurately estimate the power and energy production in urban photovoltaic (PV) systems, which are commonly covered by shades affecting its performance. The solution is based on an efficient algorithm designed to compute, in short time, an accurate model accounting for the shades impact. In such a way, the proposed approach improves classical solutions by significantly reducing the processing time to simulate long periods, e.g. months and years, but without introducing sensible errors. Therefore, this approach is suitable to estimate the production of PV systems for economical analyses such as the return-of-invested time calculation, but also to accurately design PV installations by selecting the right number of photovoltaic modules to supply the required load power.
{"title":"Predicción de Energía en Sistemas Fotovoltaicos Urbanos","authors":"Carlos Andrés Ramos-Paja, Adriana Trejos-Grajales, Bonie J. Restrepo-Cuestas","doi":"10.22430/22565337.370","DOIUrl":"https://doi.org/10.22430/22565337.370","url":null,"abstract":"This paper proposes a new method to accurately estimate the power and energy production in urban photovoltaic (PV) systems, which are commonly covered by shades affecting its performance. The solution is based on an efficient algorithm designed to compute, in short time, an accurate model accounting for the shades impact. In such a way, the proposed approach improves classical solutions by significantly reducing the processing time to simulate long periods, e.g. months and years, but without introducing sensible errors. Therefore, this approach is suitable to estimate the production of PV systems for economical analyses such as the return-of-invested time calculation, but also to accurately design PV installations by selecting the right number of photovoltaic modules to supply the required load power.","PeriodicalId":30469,"journal":{"name":"TecnoLogicas","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68491809","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}
J. Camarillo-Peñaranda, A. Saavedra-Montes, C. Ramos-Paja
A set of recommendations to select error indices to model validation is presented in this paper. The recommendations are based on the comparison of indices used to validate dynamic systems. Nine error indices and one fit index are presented and mathematically defined. Based on the data reported in literature to validate models, step function and sine function are selected, as patron signals, to evaluate the index results. As a relevant contribution of this paper, recommendations to select and interpret error indices during the validation of physical system models are given.
{"title":"Recomendaciones para Seleccionar Índices para la Validación de Modelos","authors":"J. Camarillo-Peñaranda, A. Saavedra-Montes, C. Ramos-Paja","doi":"10.22430/22565337.372","DOIUrl":"https://doi.org/10.22430/22565337.372","url":null,"abstract":"A set of recommendations to select error indices to model validation is presented in this paper. The recommendations are based on the comparison of indices used to validate dynamic systems. Nine error indices and one fit index are presented and mathematically defined. Based on the data reported in literature to validate models, step function and sine function are selected, as patron signals, to evaluate the index results. As a relevant contribution of this paper, recommendations to select and interpret error indices during the validation of physical system models are given.","PeriodicalId":30469,"journal":{"name":"TecnoLogicas","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2013-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68492274","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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