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Domestic Hot Water Consumption Profiles Applied to a Flat Tubular Collector for Solar Water Heating in Bogotá 波哥大太阳能热水供暖扁管集热器的生活热水消耗概况
IF 0.3 Pub Date : 2020-12-10 DOI: 10.18180/tecciencia.2020.31.3
Juan Andres Avila Carraznza, Carlos Mario Rocha, Juan Sebastian Solis Chavez
The use of Flat Solar Collectors for the generation of Domestic Hot Water (DHW), facilitates access to this resource in an efficient, economical and sustainable way. The Sustainable Development Goals proposed by the UN, referring specifically to sustainable water management and access to renewable energy, are the main motivation for this work, since the former is an essential vital resource and its access reduces the inequality index, in developing countries such as Colombia, while the use of solar thermal energy reduces the environmental impact of the water heating process, thus reducing the consumption of electrical energy in the residential sector. Therefore, this work proposes to estimate DHW profiles through a spreadsheet that models the DHW flow thermodynamically for a whole year, making it possible to evaluate the energy performance of a Solar Collector available in the Colombian market and that is used in four types of dwellings located in the city of Bogotá. The simulation results present the DHW consumption profiles in kg/h per year, with DHW temperatures of up to 21°C, for a total transmitted irradiance of the order of 1100 W/m^2, which produces thermal energy close to 1kW. This comparative analysis allows us to review the technical and economic feasibility of solar collectors installed in single-family homes and with a DHW consumption profile close to the Colombian socio-economic reality
使用平板太阳能收集器产生生活热水(DHW),有助于以高效、经济和可持续的方式获得这种资源。联合国提出的可持续发展目标,特别是可持续水管理和可再生能源的获取,是这项工作的主要动机,因为前者是一种重要的重要资源,其获取减少了哥伦比亚等发展中国家的不平等指数,而太阳能热能的使用减少了热水过程对环境的影响,从而减少了住宅部门的电能消耗。因此,这项工作建议通过一个电子表格来估计DHW剖面,该电子表格对全年的DHW流量进行热力学建模,从而有可能评估哥伦比亚市场上可用的太阳能收集器的能源性能,该太阳能收集器用于波哥大市的四种住宅。模拟结果显示了DHW消耗情况,单位为每年kg/h,DHW温度高达21°C,总透射辐照度为1100 W/m^2,产生的热能接近1kW。这种比较分析使我们能够审查安装在独栋住宅中的太阳能收集器的技术和经济可行性,并使DHW的消费情况接近哥伦比亚的社会经济现实
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引用次数: 0
Aspectos Jurídicos en Tiempos del COVID 19 新冠病毒时代的法律问题19
IF 0.3 Pub Date : 2020-11-20 DOI: 10.18180/aspectosjuridicosentiemposdelcovid19
Marco Antonio Ruiz Nieves
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引用次数: 0
Modelos Gráficos Probabilísticos Aplicados al Análisis Espacial en R: Hurtos de Celulares en Bogotá 概率图形模型在空间分析中的应用:波哥大手机盗窃
IF 0.3 Pub Date : 2020-11-11 DOI: 10.18180/tecciencia.2019.29.2
Danna Cruz Reyes
Resumen. Los avances tecnológicos recientes permiten la recopilación, el procesamiento y el almacenamiento de información a gran escala. Esto ha determinado el comienzo del big data , donde el aumento de la información ha dado lugar a conjuntos de datos grandes y complejos que pueden ser po-tencialmente explotados para encontrar soluciones a problemas relevantes
总结。最近的技术进步使大规模收集、处理和储存信息成为可能。这决定了大数据的开始,在大数据中,信息的增加导致了大型复杂的数据集,这些数据集可以被潜在地利用来找到相关问题的解决方案
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引用次数: 0
Status of astronomy Outreach in Chile 智利天文学推广现状
IF 0.3 Pub Date : 2020-11-11 DOI: 10.18180/tecciencia.2019.29.4
F. Char
Currently, astronomy outreach in Chile is in good health. There is atleast a dozen research groups belonging to universities, and most ofthem also include a specific area for Education and Public Outreach(EPO), using resources to communicate astronomy to the public. Amateur astronomy, astrotourism and astronomy clubs at schools are alsoimportant actors in astronomy outreach, as well as recent initiativesfrom the government recognizing the dark skies as our natural heritage, and promoting science as a useful tool for knowledge and development. This presentation summarizes some of these initiatives,focusing on creating new educative materials establishing alliances,and finally discussing how these efforts could consolidate the leadership of Chile in astronomy education, and how we could create newopportunities in South America on this topic.
目前,智利的天文学外联工作状况良好。大学至少有十几个研究小组,其中大多数还包括一个特定的教育和公共外联领域,利用资源向公众传播天文学。业余天文学、天文旅游和学校的天文俱乐部也是天文学推广的重要参与者,也是政府最近提出的承认黑暗天空是我们的自然遗产的倡议,并促进科学成为知识和发展的有用工具。本演讲总结了其中的一些举措,重点是创建新的教育材料,建立联盟,最后讨论了这些努力如何巩固智利在天文学教育方面的领导地位,以及我们如何在南美洲创造这一主题的新机会。
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引用次数: 0
Scheduling of Flow Shop Production Systems with Particle Swarm Optimization 基于粒子群算法的流水车间生产系统调度
IF 0.3 Pub Date : 2020-10-10 DOI: 10.18180/tecciencia.2021.31.1
L. Leguizamon, L.A Leguizamon, C. Leguizamón
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引用次数: 0
Air quality trend and proposal of a web application for the atmospheric monitoring network in Tabasco, México. 墨西哥塔巴斯科市空气质量趋势及大气监测网网络应用方案。
IF 0.3 Pub Date : 2020-07-07 DOI: 10.18180/tecciencia.28.02
Elizabeth Magaña Villegas, M. López
How to cite: Magaña E. et al., Air quality trend and proposal of a web application for the atmospheric monitoring network in Tabasco, México., TECCIENCIA, Vol. 15, No. 28, 15-28, 2020 DOI:http://dx.doi.org/10.18180/tecciencia.28.2 ABSTRACT Air pollution is an increasingly concerning problem given it constitutes a risk for people’s health and the environment. In Mexico, there are some regions where society does not know the conditions of air quality, and in some others this information is not used or analyzed. Hence is important the study of air quality evolution to generate strategies that allow to mitigate adverse effects on population. In this research we analyze the trend of Criteria Air Pollutants (PM10 and O3 and CO), considering the distribution of good, regular and bad days for air quality, as well as the trend of hourly, daily, monthly and annual concentrations in the city of Villahermosa, Tabasco between 2011-2017, with information provided by the State government, in order to design an effective communication mechanism. We obtained air quality indicators based on the official Mexican regulation and the temporal behavior of the pollutants. Additionally, we trained artificial neural network models for the prediction of air pollutant concentration. Finally, we propose the design of a web portal for the communication of air quality. According to the weekly behavior, is shown that we are exposed daily to potential health hazards by any of the air pollutants, also that the second trimester of each year shows the worst conditions and that the pollutants that have a greater contribution to air pollution in the city are CO, PM10 andO3. Likewise, the tendencies of PM10 andO3 indicate a slow decrease of -0.5 ug/m3-year, -0.0004 ppm-year respectively, which requires a redefinition of government strategies that may potentiate their decrease. In this sense, the web portal is proposed under two main approaches: First, with the purpose of communication, aimed to the society so it can take preventive measures on their exposure to high contamination levels. The second approach is aimed to the academic community and government authorities, with graphic information on the criteria air pollutants’ tendencies, providing analytical elements for structuring environmental policies.
引用方式:Magaña E. et al.,空气质量趋势和在塔巴斯科的大气监测网络的web应用程序的建议,墨西哥。摘要:空气污染是一个日益受到关注的问题,因为它对人们的健康和环境构成了风险。在墨西哥,有些地区的社会不知道空气质量的状况,而在其他一些地区,这些信息没有被使用或分析。因此,对空气质量演变的研究对于制定能够减轻对人口不利影响的策略非常重要。在这项研究中,我们分析了标准空气污染物(PM10和O3和CO)的趋势,考虑到空气质量好的、正常的和坏的日子分布,以及每小时、每天、每月和每年的浓度趋势,塔巴斯科州比利亚埃尔莫萨市2011-2017年期间,州政府提供的信息,以设计一个有效的沟通机制。我们根据墨西哥官方规定和污染物的时间行为获得了空气质量指标。此外,我们训练了人工神经网络模型来预测空气污染物浓度。最后,我们提出了一个空气质量交流的门户网站的设计。根据每周的行为,我们每天都暴露在任何一种空气污染物的潜在健康危害中,而且每年的第二个三个月的情况最糟糕,对城市空气污染贡献较大的污染物是CO, PM10和do3。同样,PM10和do3的趋势分别显示缓慢下降,分别为-0.5 ug/m3-年和-0.0004 ppm-年,这需要政府重新定义可能促进其下降的策略。从这个意义上说,门户网站的提出主要有两种途径:第一,以沟通为目的,针对社会,使其能够对暴露于高污染水平的社会采取预防措施。第二种方法针对学术界和政府当局,提供关于空气污染物趋势标准的图形信息,为制定环境政策提供分析要素。
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引用次数: 0
Novel Design of polycrystalline CdTe/Si Tandem Solar Cells Using SiO2/TiO2 Distributed Bragg Reflector 利用SiO2/TiO2分布式Bragg反射器设计CdTe/Si串联太阳能电池
IF 0.3 Pub Date : 2020-06-06 DOI: 10.18180/tecciencia.28.6
Amirreza Rouhbakhshmeghrazi, M. Madadi
In this paper, a polycrystalline cadmium telluride/silicon ( CdTe / Si ) solar cell based on SiO 2 / TiO 2 distributed Bragg reflector (DBR) is proposed and investigated using calibrated simulations with experimental data of previous fabrication device. At first, by inserting the SiO 2 / TiO 2 DBR, the conversion efficiency is increased by about 25 % compared with the conventional CdTe / Si solar cell with similar dimen-sions. In addition, the carrier lifetime of absorber layer can provide an improved conversion efficiency of 15% compared with the CdTe / Si conventional solar cell. The obtained open circuit voltage, short circuit current density, fill factor and con-versionefficiencyofproposedsolarcellstructurewereabout 1 . 2 V, 39 . 5 mA / cm 2 , 0 . 95 and 28 . 5% under global AM 1 . 5 conditions, respectively. The results strongly con-firm that the polycrystalline CdTe / Si solar cell based on SiO 2 / TiO 2 DBR seems to be the most optimal choice for converting the solar energy in high efficiency photovoltaics systems. confirman que la celda solar policristalina CdTe / Si basada en SiO 2 / TiO 2 DBR es una opción más óptima para convertir la energía solar en sistemas fotovoltaicos de alta eficiencia. (DBR).
本文提出了一种基于二氧化硅/二氧化钛分布式布拉格反射器(DBR)的多晶碲化镉/硅(CdTe / Si)太阳能电池,并利用前人制备装置的实验数据进行了标定模拟研究。首先,通过插入sio2 / tio2 DBR,与同等尺寸的传统CdTe / Si太阳能电池相比,转换效率提高了约25%。此外,吸收层的载流子寿命可以提供比CdTe / Si传统太阳能电池提高15%的转换效率。所得的开路电压、短路电流密度、填充系数和转换效率均约为1。2:39。5毫安/厘米2,095和28。全球AM 1下5%。5个条件。结果有力地证实了基于sio2 / tio2 DBR的多晶CdTe / Si太阳能电池似乎是高效光伏系统中太阳能转换的最佳选择。确认的que la celda solar politicstalina CdTe / Si basada en sio2 / tio2 DBR是una opción más óptima para转换器la energía太阳能系统的fotovoltaicos de alta效率。(DBR)。
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引用次数: 4
ANÁLISIS AERODINÁMICO DE LA AERONAVE USB AERO MEDIANTE DINÁMICA DE FLUIDOS COMPUTACIONAL 基于计算流体力学的USB Aero飞机气动分析
IF 0.3 Pub Date : 2020-05-04 DOI: 10.18180/tecciencia.28.5
Juan Sebastián Sánchez Ocampo, Jordy Francisco Tamayo Andrade, Sergio Andres Lopez Aragon, R. Cerpa
The present research study presents the results of the aerodynamic analysis of a USB AERO aircraft using computational fluid dynamics (CFD) in operational conditions of cruise flight at an angle of attack of  3.5 degrees. The ANSYS FLUENT computational tool was used, with which the lift, drag and longitudinal momentum coefficients were determined. Additionally, the aircraft was analyzed at different angles of attack in order to determine aerodynamic characteristics such as the highest lift coefficient and the loss angle, in addition to establishing the maximum aerodynamic efficiency.
本研究介绍了在3.5度迎角巡航飞行的操作条件下,使用计算流体动力学(CFD)对USB AERO飞机进行空气动力学分析的结果。使用ANSYS FLUENT计算工具,确定了升力、阻力和纵向动量系数。此外,还对飞机在不同攻角下进行了分析,以确定空气动力学特性,如最高升力系数和损失角,以及确定最大空气动力学效率。
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引用次数: 0
Semantic Model Representation In Colombian Computer Law 哥伦比亚计算机法中的语义模型表示
IF 0.3 Pub Date : 2020-04-01 DOI: 10.18180/tecciencia.28.4
Juan Fernando Rojas, Julio Barón Velandia, Paulo Alonso Gaona García
Ontological representations in different domains of reality enable the creation of conceptual relationships that can be coded to reuse and share knowledge. The present article proposes a semantic model representation in Colombian computer law through the methodological process of Methontology. This proposal is the first approximation of a legal semantic model in Colombia that allows structuring searches founded on inferences to obtain information with a high degree of relevance for lawful expert users. The queries of the proposed model are made by semantic content, contrasting to the current legal information search engines which execute queries by textual coincidence.
不同现实领域中的本体表示可以创建概念关系,这些关系可以通过编码来重用和共享知识。本文通过方法论的方法论过程,提出了哥伦比亚计算机法的语义模型表示。该提案是哥伦比亚法律语义模型的第一个近似值,该模型允许基于推理构建搜索,从而为合法专家用户获取高度相关的信息。该模型的查询是根据语义内容进行的,而不是现有的法律信息搜索引擎通过文本巧合来执行查询。
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引用次数: 0
Design of a Digital Tool for Communication and Analysis of Air Quality in Tabasco, Mexico. 墨西哥塔巴斯科空气质量通信和分析数字工具的设计。
IF 0.3 Pub Date : 2020-03-06 DOI: 10.18180/tecciencia.28.3
Elizabeth Magaña Villegas, M. López, Sergio Ramos Herrera, Jesús Manuel Carrera Velueta, O. Peralta
Air pollution is an increasingly concerning problem given it constitutes a risk for people’s health and the environment. In Mexico, there are some regions where society does not know the conditions of air quality, and in some others this information is not used or analyzed. Hence is important the study of air quality evolution to generate strategies that allow to mitigate adverse effects on population. In this research we analyze the trend of Criteria Air Pollutants (PM 10 , O 3 and CO), considering the distribution of good, regular and bad days for air quality, as well as the trend of hourly, daily, monthly and annual concentrations in the city of Villahermosa, Tabasco between 2011-2017, with information provided by the State government, in order to design an effective communication mechanism. We obtained air quality indicators based on the official Mexican regulation and the temporal behavior of the pollutants. Additionally, we trained artificial neural network models for the prediction of air pollutant concentration. Finally, we propose the design of a web portal for the communication of air quality. According to the weekly behavior, is shown that we are exposed daily to potential health hazards by any of the air pollutants, also that the second trimester of each year shows the worst  conditions and that the pollutants that have a greater contribution to air pollution in the city are CO, PM 10 and O 3 . Likewise, the tendencies of PM 10 and O 3 indicate a slow decrease of -0.5 ug/m3-year, -0.0004 ppm-year respectively, which requires a redefinition of government strategies that may potentiate their decrease. In this sense, the web portal is proposed under two main approaches: First, with the purpose of communication, aimed to the society so it can take preventive measures on their exposure to high contamination levels. The second approach is aimed to the academic community and government authorities, with graphic information on the criteria air pollutants’ tendencies, providing analytical elements for structuring environmental policies.
空气污染是一个日益令人担忧的问题,因为它对人们的健康和环境构成了风险。在墨西哥,有些地区的社会不了解空气质量状况,而在其他一些地区,这些信息没有被使用或分析。因此,对空气质量演变的研究对于制定能够减轻对人口不利影响的策略至关重要。在本研究中,我们分析了2011-2017年间塔巴斯科维拉赫莫萨市空气质量标准污染物(PM 10、O 3和CO)的趋势,考虑到空气质量的好、规律和坏天数的分布,以及小时、日、月和年浓度的趋势,以便设计一个有效的沟通机制。我们根据墨西哥官方法规和污染物的时间行为获得了空气质量指标。此外,我们还训练了用于预测空气污染物浓度的人工神经网络模型。最后,我们提出了一个用于空气质量交流的门户网站的设计。根据每周的行为,表明我们每天都暴露在任何空气污染物对健康的潜在危害中,每年的中期表现出最糟糕的情况,对城市空气污染贡献更大的污染物是CO、PM10和O3。同样,PM 10和O3的趋势表明,其缓慢下降幅度分别为-0.5微克/立方米年和-0.0004 ppm年,这需要重新定义政府战略,以加强其下降。从这个意义上说,门户网站是根据两种主要方法提出的:第一,以沟通为目的,面向社会,以便对他们暴露在高污染水平下采取预防措施。第二种方法针对学术界和政府当局,提供有关空气污染物趋势标准的图形信息,为制定环境政策提供分析要素。
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引用次数: 0
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