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Digital twins as enablers of structure inspection and maintenance 数字孪生作为结构检查和维护的推动者
Pub Date : 1900-01-01 DOI: 10.1590/1806-9649-2022v30e4922
Julia Menegon, E. Isatto
Abstract: The emergence of new technologies based on the exchange of data and information via the internet has prompted a revolution in the industry as a whole. First applied in manufacturing, the movement known as the Fourth Industrial Revolution soon spread and changed the dynamics of many other fields. Digital twins (DTs), one of the technologies that emerged in this scenario, are used to replicate physical environments in virtual models. Such models must be supplied with up-to-date information throughout a product's lifecycle to ensure accurate representation of the real asset. DTs have great potential to impact the construction industry, supporting facilities management, simulation tasks, and centralized management and recording of interventions. However, despite the attention the theme has attracted among researchers and companies, implementation of the concept in practical situations is still largely underexplored. Thus, this study aims to critically analyze the concept of DTs and their potential in the construction industry, particularly in inspection and maintenance tasks for existing structures. The study comprises a literature review undertaken to identify the multiple types of DT models, examine barriers and opportunities associated with their use, and discuss their potential as enablers of inspection and maintenance strategies. Furthermore, research opportunities related to the use of DTs for structural inspection and maintenance are suggested.
摘要:基于互联网数据和信息交换的新技术的出现,在整个行业引发了一场革命。被称为第四次工业革命的运动首先应用于制造业,很快蔓延并改变了许多其他领域的动态。数字孪生(DTs)是在此场景中出现的技术之一,用于在虚拟模型中复制物理环境。这样的模型必须在产品的整个生命周期中提供最新的信息,以确保真实资产的准确表示。DTs在影响建筑行业、辅助设施管理、模拟任务以及集中管理和记录干预措施方面具有巨大的潜力。然而,尽管这一主题吸引了研究人员和公司的关注,但在实际情况下实施这一概念的探索仍然很大程度上不足。因此,本研究旨在批判性地分析dt的概念及其在建筑行业中的潜力,特别是在现有结构的检查和维护任务中。该研究包括一项文献综述,旨在确定多种类型的DT模型,检查与其使用相关的障碍和机会,并讨论它们作为检查和维护策略的推动因素的潜力。此外,还提出了与使用dt进行结构检查和维护相关的研究机会。
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引用次数: 2
Model proposition for predicting sustainability classes using multicriteria decision support and artificial intelligence 使用多标准决策支持和人工智能预测可持续性课程的模型命题
Pub Date : 1900-01-01 DOI: 10.1590/1806-9649-2022v29e6922
Ayrton Benedito Gaia do Couto, L. Rangel
Abstract: The current study proposes a novel prediction model of sustainability classes for electricity distribution companies in Brazil, based on sustainability indicators, aiming at a more effective risk management for a certain company among their competitors. Because such indicators are based on quantitative and qualitative measures and are very likely to incur imprecisions in their measures, the model to be proposed is based on a Multicriteria Decision Support, Rough Sets Theory, which allows the mathematical treatment of those imprecisions, and Artificial Intelligence, in this case, Machine Learning by rules inference. Consequently, decision tables are generated with condition attributes, sustainability indicators, and decision attributes, sustainability classes: high, medium or low. As a result, it is possible to predict sustainability classes based in temporal series of indicators and rules inference from decision tables, using RoughSets package in R and the jMAF software, demonstrating the use of five rule generation algorithms and their respective accuracies.
摘要:本文基于可持续性指标,提出了一种新的巴西配电公司可持续性等级预测模型,旨在对某公司在竞争对手中进行更有效的风险管理。由于这些指标基于定量和定性度量,并且很可能在度量中产生不精确,因此提出的模型基于多标准决策支持,粗糙集理论,允许对这些不精确进行数学处理,以及人工智能,在这种情况下,通过规则推理的机器学习。因此,生成的决策表包含条件属性、可持续性指标和决策属性、可持续性等级:高、中或低。因此,使用R中的RoughSets包和jMAF软件,可以根据指标的时间序列和决策表中的规则推断来预测可持续性类别,展示了五种规则生成算法的使用及其各自的准确性。
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引用次数: 0
Climate analysis using neural networks as supporting to the agriculture 基于神经网络的农业气候分析
Pub Date : 1900-01-01 DOI: 10.1590/1806-9649-2022v29e06
L. Borella, Margareth Rodrigues de Carvalho Borella, L. Corso
Abstract The aim of this study is to conduct climate forecasting with models of artificial neural networks as a tool in the decision-making process for the planting of some types of agricultural products. A database with the main climate elements was built from the National Institute of Meteorology (INMET), and those elements that influenced the average temperature value the most were found at a significance level of 0.05. Models of Artificial Neural Networks were developed and tested using Mean Absolute Deviation (MAD), Mean Squared Error (MSE), Root-Mean Squared Error (RMSE), and Mean Absolute Percentage Error (MAPE), before being linked to the best agricultural cultivation forecast value. Twelve neural networks were elaborated, eight of them are related to the temperature forecast and the other four are related to the precipitation forecast. The networks that showed the best performance are those that consider all the elements of climate. It is possible to conclude that the artificial neural networks showed an adequate performance in predicting chaotic time series, and that their results were therefore linked to the optimum cultivation to use for each forecast. A schedule is supplied at the end, indicating the ideal time to plant each of the crops evaluated. Carrot is found to be the best suited crop for the forecasted range over the next five years.
摘要本研究的目的是将人工神经网络模型作为一种工具,在某些农产品种植决策过程中进行气候预测。国家气象研究所(INMET)建立了主要气候要素数据库,发现对平均温度值影响最大的要素在0.05的显著性水平上。利用平均绝对偏差(MAD)、均方误差(MSE)、均方根误差(RMSE)和平均绝对百分比误差(MAPE)建立了人工神经网络模型,并对其进行了检验,然后将其与最佳农业种植预测值联系起来。详细介绍了12个神经网络,其中8个与温度预报有关,4个与降水预报有关。表现最好的网络是那些考虑了所有气候因素的网络。可以得出结论,人工神经网络在预测混沌时间序列方面表现出足够的性能,因此它们的结果与用于每次预测的最佳培养有关。最后提供了一个时间表,指出每种作物的理想种植时间。在未来五年的预测范围内,胡萝卜被认为是最适合的作物。
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引用次数: 0
Relationship between Just in Time, Lean Manufacturing, and Performance Practices: a meta-analysis 准时制、精益生产和绩效实践之间的关系:一项元分析
Pub Date : 1900-01-01 DOI: 10.1590/1806-9649-2022v29e9021
Ana Cláudia Lara, Elizangela Maria Pas Menegon, Simone Sehnem, E. Kuzma
Abstract: Companies strive for superior results. Focusing on return, performance, and profitability is mainstream; this reasoning is constantly present in the decisions of the strategic operational management of companies. Based on this assumption, the objective of this work is to evaluate empirically whether the degree to which a company implements a combination of Just in Time (JIT) or Lean Manufacturing practices systematically affects the company's operational, financial, and/or organisational performance. For this, a meta-analysis was carried out; the final sample consisted of 28 articles, with 41 studies and 12,708 included subjects who provided the effects that explain the proposed relationship. The data were collected in the Web of Science, EBSCO, and Science Direct databases, with an open period, considering all works available until July 2020. Among the main findings, JIT practices and the company's operational performance present a positive, significant, medium effect. Lean manufacturing practices demonstrate a positive and significant relationship in operational, financial, and organisational performance, all with an average impact on the effect size. No direct relationship was found between the JIT variables and organisational performance (financial, operational, and environmental), based on the TBL. Additional research is needed regarding the relationship of JIT and Lean Manufacturing practices with the organisational performance (financial, operational, and environmental) based on the TBL, as well as an in-depth analysis of previous research related to green Lean practices and their relationship with organisational performance, based on the TBL.
摘要:企业追求卓越的业绩。关注回报、业绩和盈利能力是主流;这种推理经常出现在公司战略运营管理的决策中。基于这一假设,本工作的目标是根据经验评估公司实施准时制(JIT)或精益生产实践组合的程度是否系统地影响公司的运营,财务和/或组织绩效。为此,进行了荟萃分析;最终的样本包括28篇文章,41项研究和12708个提供了解释所提出的关系的影响的对象。数据收集于Web of Science、EBSCO和Science Direct数据库,考虑到2020年7月之前的所有可用作品,有一个开放期。在主要发现中,JIT实践与公司的经营绩效呈现正的、显著的、中等的影响。精益生产实践在运营、财务和组织绩效方面表现出积极和显著的关系,所有这些都对效应大小有平均影响。基于TBL,没有发现JIT变量和组织绩效(财务、运营和环境)之间的直接关系。需要进一步研究基于TBL的JIT和精益生产实践与组织绩效(财务、运营和环境)的关系,以及对基于TBL的绿色精益实践及其与组织绩效关系的先前研究进行深入分析。
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引用次数: 1
A cyber process control system based on pattern recognition and cloud computing 基于模式识别和云计算的网络过程控制系统
Pub Date : 1900-01-01 DOI: 10.1590/1806-9649-2022v29e5221
Amr Mohamed Ali, S. Yacout, E. Rabeih, Y. Shaban
Abstract: This paper presents a novel simulation model of the Cyber Process Control System (CPCS) by combining pattern recognition and Cloud Computing (CC). This paper's originality arises from its aim to build a cloud computing platform for autonomous machines, and the exploration of manufacturing data to generate interpretable patterns to be used in process control decision making. The combining of Cloud technology and machine learning brings production to Industry 4.0. The proposed system is tested using data Carbon Fiber Reinforced Polymer (CFRP) routing process. The little information available about the manufacturing process of this type of material and the interaction between the production steps makes the manufacturing process quite difficult. This system generates interpretable rules of controllable operating parameters sent to the controller to keep the machining process within the limits of the specifications. The second step is activated during the drifting conditions in the machining step. Also, the simulation of the machining process is illustrated to generate the relations between input and output variables of the machining process. The findings of the corrective actions are illustrated and the interaction between the two industrial steps is simulated. Finally, current and future CPCS and CC applications in Industry 4.0 are discussed.
摘要:本文提出了一种结合模式识别和云计算的网络过程控制系统(CPCS)仿真模型。本文的独创性在于其旨在为自主机器构建云计算平台,并探索制造数据以生成可解释的模式,用于过程控制决策。云技术和机器学习的结合将生产带入工业4.0。采用数据碳纤维增强聚合物(CFRP)布线工艺对该系统进行了测试。关于这种材料的制造过程和生产步骤之间的相互作用的信息很少,这使得制造过程相当困难。该系统生成可解释的可控制操作参数规则,发送给控制器,使加工过程保持在规范的范围内。第二步是在加工步骤的漂移条件下启动的。并对加工过程进行了仿真,得到了加工过程输入和输出变量之间的关系。说明了纠正措施的结果,并模拟了两个工业步骤之间的相互作用。最后,讨论了当前和未来的CPCS和CC在工业4.0中的应用。
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引用次数: 0
Quality Management Systems: correlation study between leadership and maturity 质量管理体系:领导力与成熟度的相关性研究
Pub Date : 1900-01-01 DOI: 10.1590/1806-9649-2022v29e7921
C. Silva, A. Matos
abstract: Leadership is a key element of quality management, and, as such, it has been identified as an influential factor in the maturity of quality management systems (QMSs). Some of the previous studies on the relationship between leadership styles and QMS performance have argued that no universal best leadership style exists, stressing that leadership practices should be appropriate to the context. Thus, this research aims to further explore this relationship by considering the QMS context, namely the practitioners' leadership profile and the QMS maturity. Accordingly, the primary objectives of this study are 1) to understand if a leadership style is predominant depending on the QMS maturity and 2) to understand the relationship between the leadership practices of different styles and the dimensions of the QMS maturity. An exploratory quantitative study was developed in companies located in Portugal through a survey based on the maturity model developed by Nascimento et al. (2016) and the Multifactor Leadership Questionnaire®-5X Short Leader Form MLQ of Avolio and Bass (1995). The diagnosis disclosed that only 32% of the sample had a QMS with higher maturity levels (4 and 5, a scale of 1 to 5). The results highlighted that no single leadership style dominates a specific maturity level. Furthermore, a significant positive correlation was demonstrated between several practices of transformational and transactional leadership styles and the dimensions of QMS maturity. As a practical contribution, a guideline was provided with some examples of leadership practices and their impacts on the specific dimensions of QMS maturity. Some steps were also proposed to enable organisations to develop a tailored programme to foster leadership practices suitable to the internal context and promote QMS maturity.
文摘:领导是质量管理的关键因素,而且,因此,它被认为是一个有影响力的因素的成熟质量管理体系(qms)。以往一些关于领导风格与质量管理体系绩效关系的研究认为,不存在普遍的最佳领导风格,强调领导实践应因地制宜。因此,本研究旨在进一步探索这种关系通过考虑QMS上下文,即从业人员的领导形象和QMS成熟。因此,本研究的主要目标是1)了解领导风格是否取决于质量管理体系成熟度,2)了解不同风格的领导实践与质量管理体系成熟度维度之间的关系。通过基于Nascimento等人(2016)开发的成熟度模型和volio和Bass(1995)的多因素领导力问卷®-5X短领导者表单MLQ的调查,在葡萄牙的公司中开展了探索性定量研究。诊断显示,只有32%的样本拥有更高成熟度水平的质量管理体系(4和5,1到5的等级)。结果突出表明,没有单一的领导风格主导特定的成熟度水平。此外,变革型和交易型领导风格的实践与质量管理体系成熟度的维度之间存在显著的正相关。作为一项实践贡献,本文提供了一些领导实践的例子及其对质量管理体系成熟度特定维度的影响。还提出了一些步骤,使组织能够制定量身定制的计划,以培养适合内部环境的领导实践,并促进质量管理体系的成熟度。
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引用次数: 0
Analysis of sales of vertical residential real estate projects in Goiânia and its influencing factors 南京市垂直住宅房地产项目销售情况及影响因素分析
Pub Date : 1900-01-01 DOI: 10.1590/1806-9649-2022v29e020
T. Amaral, Roberto Sebba Kafuri, M. L. Oliveira, Matheus Ramos Kafuri, Ronny Marcelo Aliaga Medrano
Abstract Several topics were analyzed to produce this article, such as Evaluation Engineering, Data Modeling, Data Mining and Big Data. Although the literature on these theories is extensive, there is no record of their simultaneous use in favor of conducting an analysis of the real estate market in a city or region. The present work aims to use these theories to elaborate and implement quantitative criteria which group real estate projects according to their sale speed in order to classify them as high or low demand in the market. Thus, a database was used to develop the proposal, containing the number of units sold from 268 real estate developments in Goiânia with a launch date between January 2016 to December 2019, recorded month by month, generating a total of 4746 entries in the database. Data Mining and Big Data techniques were used to determine the database to perform the research and enable direct comparison between the analyzed enterprises. It was possible to accurately define the greatest market opportunities by studying the characteristics of the number of bedrooms, private square footage, price per square meter, apartment price and location.
本文分析了评估工程、数据建模、数据挖掘和大数据等几个主题。虽然关于这些理论的文献很广泛,但没有记录表明它们同时被用于对一个城市或地区的房地产市场进行分析。本研究的目的是利用这些理论来阐述和实施量化标准,根据房地产项目的销售速度对房地产项目进行分组,以便将其分类为市场需求高或低。因此,我们使用了一个数据库来制定该提案,其中包含了goi尼亚268个房地产开发项目的销售单位数量,启动日期为2016年1月至2019年12月,逐月记录,在数据库中产生了4746个条目。使用数据挖掘和大数据技术来确定进行研究的数据库,并使被分析企业之间能够进行直接比较。通过研究卧室数量、私人面积、每平方米价格、公寓价格和位置的特征,可以准确地定义最大的市场机会。
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引用次数: 0
Digital transformation in school management: the legacy that strategic actions in the 2020s leave for future pandemics 学校管理的数字化转型:2020年代战略行动为未来大流行病留下的遗产
Pub Date : 1900-01-01 DOI: 10.1590/1806-9649-2022v29e622
Jacqueline de Almeida Barbosa Franco, Maximilian Espuny, J. M. Reis, Gabriel Miranda Monteiro Diogo, L. Paes, A. C. Costa, T. Nunhes, L. C. Barbosa, A. M. Rodrigues, R. Battistelle, O. Oliveira
Abstract: With the outbreak of social withdrawal due to the pandemic, many countries have undergone drastic transformations in various spheres. In education, face-to-face classes were transformed into distance learning. However, this sudden change caused several problems for students and teachers. Given these events, the purpose of this article was to propose exceptional actions to improve the transition from face-to-face classes to virtual classes. For this, the elements that positively and negatively impacted education in the Covid-19 pandemic were identified in the literature. These elements were then clustered into four strategies, these being: redesign of pedagogical practices, psychological and social support, technological infrastructure in virtual teaching, and school management to cope with the pandemic scenario. The multiple case study method was used, investigating five technical schools located in the state of São Paulo (Brazil). With this, it was possible to propose 10 exceptional actions aimed at the transition from face-to-face classes to virtual classes. The main novelty of this article was the proposition of actions to motivate the school community against the impacts of the pandemic, building memory in its agents, making them more prepared for unexpected events.
摘要:随着疫情引发的社会退缩现象的爆发,许多国家在各个领域都发生了剧烈的变革。在教育方面,面对面的课程转变为远程学习。然而,这种突然的变化给学生和老师带来了一些问题。考虑到这些事件,本文的目的是提出一些特殊的措施,以改进从面对面课程到虚拟课程的过渡。为此,在文献中确定了在Covid-19大流行中对教育产生积极和消极影响的因素。然后将这些要素归纳为四项战略,即:重新设计教学实践、心理和社会支持、虚拟教学中的技术基础设施以及应对大流行情景的学校管理。采用多案例研究方法,调查了位于巴西圣保罗州的五所技术学校。有了这个,就有可能提出10个特殊的行动,旨在从面对面的课程过渡到虚拟课程。这篇文章的主要新颖之处在于提出采取行动激励学校社区应对大流行的影响,在其代理人中建立记忆,使他们为突发事件做好更充分的准备。
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引用次数: 2
Social construction as a means of ergonomic intervention 社会建设作为一种人机工程学干预手段
Pub Date : 1900-01-01 DOI: 10.1590/1806-9649-2022v29e5022
Raoni Rocha, José Marçal Jackson Filho, A. Garrigou, Adelaide Nascimento
Abstract Although Ergonomic Workplace Analysis (EWA) practice is common in Brazil, some critics have asserted that it is not sufficient to bring about an effective change of the workplace. Although this criticism may be partly admissible in regard to Brazilian ergonomics, it cannot be considered to apply to France, where Activity-Centered Ergonomics was born. At the same time, it is important to not confuse EWA with the broader field of Activity-Centered Ergonomics. Against this background, this article seeks to analyze the elements that characterize contemporary ergonomics practices in Brazil so as to compare them to the modes of intervention developed in France. We also seek to investigate models, concepts and methods so as to expand the possibilities of ergonomic interventions in Brazil. To do so, we will start from a theoretical examination of the development of EWA in Brazil from its origins in France, presenting an intervention conducted at a French electricity company. Next, we will discuss the losses suffered by EWA during the transfer of EWA methodology from France to Brazil, as well as the need to cultivate social construction at all stages of these interventions. We conclude by showing the importance of developing this debate in the field of ergonomics and the need to continue it.
虽然工效学工作场所分析(EWA)的做法是常见的在巴西,一些批评人士断言,这是不足以带来一个有效的改变工作场所。虽然这种批评在一定程度上可以接受巴西的人体工程学,但它不能被认为适用于法国,以活动为中心的人体工程学诞生了。同时,重要的是不要将EWA与更广泛的以活动为中心的人体工程学领域混淆。在此背景下,本文试图分析巴西当代人体工程学实践的特征要素,以便将其与法国发展的干预模式进行比较。我们还寻求研究模型、概念和方法,以扩大巴西人体工程学干预的可能性。为了做到这一点,我们将从理论上考察EWA在巴西的发展,从它的起源法国开始,提出在一家法国电力公司进行的干预。接下来,我们将讨论在将EWA方法从法国转移到巴西期间EWA遭受的损失,以及在这些干预的所有阶段培养社会建设的必要性。最后,我们展示了在人体工程学领域开展这场辩论的重要性以及继续进行辩论的必要性。
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引用次数: 1
Overview of the factors that influence the competitiveness of startups: a systematized literature review 影响创业公司竞争力的因素综述:系统化的文献综述
Pub Date : 1900-01-01 DOI: 10.1590/1806-9649-2022v29e13921
Claudio Roberto Silva Júnior, J. Siluk, Alvaro Luiz Neuenfeldt Júnior, C. B. Rosa, C. Michelin
Abstract: This research presents a systematized literature review to identify the main critical success factors (CSFs) that influence startups’ competitiveness. Considering that aspects related to competitiveness should be the target of organizations, especially early-stage companies, this paper identifies a broad of factors regarding startups’ competitiveness. A total of 36 articles were selected in Scopus and Web of Science databases and an in-depth bibliometric analysis of the corpus was performed using the VOSviewer software. 25 CSFs that influence startups’ competitiveness were identified and categorized into three fundamental points of view (FPVs), namely: organizational, human, and environmental. Organizational FPV covers factors that define the internal characteristics of startups. Human FPV, in turn, consists of characteristics of human capital, while the Environmental FPV refers to external factors and the startup context. This work could help practitioners and policymakers by enlightening them about startups’ competitiveness and the elements involved therein, along with providing them with a robust conceptual framework.
摘要:本研究对影响创业公司竞争力的主要关键成功因素(critical success factors, CSFs)进行了系统的文献综述。考虑到与竞争力相关的方面应该是组织的目标,特别是早期公司,本文确定了关于创业公司竞争力的广泛因素。选取Scopus和Web of Science数据库中的36篇文献,利用VOSviewer软件对语料库进行深入的文献计量分析。确定了影响创业公司竞争力的25个csf,并将其分为三个基本观点(fpv),即:组织、人力和环境。组织FPV涵盖了定义创业公司内部特征的因素。人力FPV由人力资本特征组成,而环境FPV则是指外部因素和创业环境。这项工作可以帮助从业者和政策制定者了解创业公司的竞争力及其所涉及的要素,并为他们提供一个健全的概念框架。
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引用次数: 3
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