scholarly journals Hybrid Approach for Digital Twins in the Built Environment

2021 ◽  
Author(s):  
Yu-Wen Lin ◽  
Tsz Ling Elaine Tang ◽  
Costas J. Spanos
Keyword(s):  
Built Environment ◽  
Hybrid Approach ◽  
Digital Twins

scholarly journals Circular Digital Built Environment: An Emerging Framework

2021 ◽  
Vol 13 (11) ◽  
pp. 6348
Author(s):  
Sultan Çetin ◽  
Catherine De Wolf ◽  
Nancy Bocken
Keyword(s):  
Built Environment ◽  
Circular Economy ◽  
Digital Technologies ◽  
Geographical Information ◽  
Digital Platforms ◽  
Blockchain Technology ◽  
Digital Twins ◽  
Starting Point ◽  
Building Information ◽  
Framework Development

Digital technologies are considered to be an essential enabler of the circular economy in various industries. However, to date, very few studies have investigated which digital technologies could enable the circular economy in the built environment. This study specifically focuses on the built environment as one of the largest, most energy- and material-intensive industries globally, and investigates the following question: which digital technologies potentially enable a circular economy in the built environment, and in what ways? The research uses an iterative stepwise method: (1) framework development based on regenerating, narrowing, slowing and closing resource loop principles; (2) expert workshops to understand the usage of digital technologies in a circular built environment; (3) a literature and practice review to further populate the emerging framework with relevant digital technologies; and (4) the final mapping of digital technologies onto the framework. This study develops a novel Circular Digital Built Environment framework. It identifies and maps ten enabling digital technologies to facilitate a circular economy in the built environment. These include: (1) additive/robotic manufacturing, (2) artificial intelligence, (3) big data and analytics, (4) blockchain technology, (5) building information modelling, (6) digital platforms/marketplaces, (7) digital twins, (8) the geographical information system, (9) material passports/databanks, and (10) the internet of things. The framework provides a fruitful starting point for the novel research avenue at the intersection of circular economy, digital technology and the built environment, and gives practitioners inspiration for sustainable innovation in the sector.

scholarly journals DIGITAL TWIN FOR INDOOR DISASTER IN SMART CITY: A SYSTEMATIC REVIEW

2022 ◽  
Vol XLVI-4/W3-2021 ◽  
pp. 315-322
Author(s):  
S. Shaharuddin ◽  
K. N. Abdul Maulud ◽  
S. A. F. Syed Abdul Rahman ◽  
A. I. Che Ani
Keyword(s):  
Urban Planning ◽  
Built Environment ◽  
Disaster Management ◽  
Smart City ◽  
Smart Cities ◽  
Environmental Disaster ◽  
Digital Twin ◽  
Digital Twins ◽  
Building Information ◽  
Recent Developments

Abstract. Technology has advanced and progressed tremendously, and the term city is being elevated to a new level where the smart city has been introduced globally. Recent developments in the concept of smart city have led to a renewed interest in Digital Twin. Using precise Building Information Modelling (BIM) consolidated with big data and sensors, several attempts have been made to establish digital twin smart cities. In recent years, several researchers have sought to determine the capability of smart city and digital twin for various taxonomies such as development and urban planning purposes, built environment, manufacturing, environmental, disaster management, and healthcare. Despite being beneficial in many disciplines, especially in manufacturing, built environment, and urban planning, these existing studies have shown a lack of aspect in terms of emergency or disaster-related as opposed to the elements mentioned above. This is because the researcher has not treated emergencies or disasters in much detail. Therefore, an extensive review on smart city, digital twin, BIM and disaster management and technology that revolves around these terms were summarised. In general, 39 articles from prominent multidisciplinary databases were retrieved over the last two decades based on the suggested PRISMA workflow. These final articles were analysed and categorised into four themes based on the research content, gist, and keywords. Based on the review of 39 articles related to smart city, digital twin and BIM, a workflow for the smart city digital twin and the conceptual framework for indoor disaster management was proposed accordingly. The establishment of smart city digital twins solely for an indoor emergency can be beneficial to urbanites, and it could provide numerous benefits for enhanced situation assessment, decision making, coordination, and resource allocation.

Using digital twins and data analytics to make informed operational decisions – a centrifugal compressor case study

2021 ◽  
Vol 61 (2) ◽  
pp. 544
Author(s):  
Andy Jones ◽  
Denis Marshment
Keyword(s):  
Financial Incentives ◽  
Data Analytics ◽  
Data Science ◽  
Net Present Value ◽  
Hybrid Approach ◽  
Time Data ◽  
Operational Decisions ◽  
Natural Gas Pipeline ◽  
Digital Twins

An Australian operator with an expansive portfolio of liquefied natural gas, pipeline gas and oil assets wanted to gain greater visibility of how their compressor fleet was operating. To help the operator gain a greater understanding of the performance of their assets, Worley Digital built digital twins of 17 of their compressors. This involved detailed first principle calculations supported by hundreds of thousands of offline simulations. This created the thermodynamic correlations necessary to accurately model the most important operating statistics surrounding each stage of those assets. We then used dimensional analysis and data analytics to benchmark the operation of these machines. This represents a hybrid approach; first principles engineering and simulation coupled with data science and analytics. A suite of tools was then delivered to the operator in their preferred real-time data analytics and visualisation platform, providing them with information about the efficiency of their compressors. They were then able to perform net present value calculations based on different operating and maintenance strategies. This gave them the detailed information they needed in order to be able to make more informed decisions. An example of this might be a decision to bring a scheduled maintenance activity forward based on the knowledge that there are net operational and financial incentives to do so. The resulting tool has proved extremely valuable, quantifying some business-critical metrics that have led to several financially impactful operational decisions.

scholarly journals Digital twins of complex technical systems for management of built environment

2020 ◽  
Vol 869 ◽  
pp. 062045
Author(s):  
Nikolai Bolshakov ◽  
Vladimir Badenko ◽  
Vladimir Yadykin ◽  
Alberto Celani ◽  
Alexander Fedotov
Keyword(s):  
Built Environment ◽  
Digital Twins ◽  
Complex Technical Systems ◽  
Technical Systems

scholarly journals From BIM to digital twins: a systematic review of the evolution of intelligent building representations in the AEC-FM industry

2021 ◽  
Vol 26 ◽  
pp. 58-83
Author(s):  
Min Deng ◽  
Carol C. Menassa ◽  
Vineet R. Kamat
Keyword(s):  
Systematic Review ◽  
Life Cycle ◽  
Built Environment ◽  
Construction Process ◽  
Environment Monitoring ◽  
Ongoing Research ◽  
Digital Twin ◽  
Current State ◽  
Digital Twins ◽  
Recent Emergence

The widespread adoption of Building Information Modeling (BIM) and the recent emergence of Internet of Things (IoT) applications offer several new insights and decision-making capabilities throughout the life cycle of the built environment. In recent years, the ability of real-time connectivity to online sensors deployed in an environment has led to the emergence of the concept of the Digital Twin of the built environment. Digital Twins aim to achieve synchronization of the real world with a virtual platform for seamless management and control of the construction process, facility management, environment monitoring, and other life cycle processes in the built environment. However, research in Digital Twins for the built environment is still in its nascent stages and there is a need to understand the advances in the underlying enabling technologies and establish a convergent context for ongoing and future research. This paper conducted a systematic review to identify the development of the emerging technologies facilitating the evolution of BIM to Digital Twins in built environment applications. A total of 100 related papers including 23 review papers were selected and reviewed. In order to systematically classify the reviewed studies, the authors developed a five-level ladder categorization system based on the building life cycle to reflect the current state-of-the-art in Digital Twin applications. In each level of this taxonomy, applications were further categorized based on their research domains (e.g., construction process, building energy performance, indoor environment monitoring). In addition, the current state-of-art in technologies enabling Digital Twins was also summarized from the reviewed literature. It was found that most of the prior studies conducted thus far have not fully exploited or realized the envisioned concept of the Digital Twin, and thus classify under the earlier ladder categories. Based on the analysis of the reviewed work and the trends in ongoing research, the authors propose a concept of an advanced Digital Twin for building management as a baseline for further studies.

scholarly journals Cybersecurity for digital twins in the built environment: current research and future directions

2021 ◽  
Vol 26 ◽  
pp. 159-173
Author(s):  
Kaznah Alshammari ◽  
Thomas Beach ◽  
Yacine Rezgui
Keyword(s):  
Built Environment ◽  
Lived Experience ◽  
Smart Cities ◽  
Relevant Literature ◽  
Cyber Physical Systems ◽  
Physical Systems ◽  
Information Models ◽  
Digital Twins ◽  
Technological Developments ◽  
Smart Technologies

Recent technological developments in the construction industry are seeking to create smart cities by using Cyber-Physical Systems (CPSs) to enhance information models such as BIM. Currently, BIM models are commonly adopted to work with IoT-based systems and embrace smart technologies that offer interoperability in the communication layer. In future, it is envisioned that digital twins will provide new possibilities for cyber-physical systems via monitoring and simulation. However, rarely in this rapidly developing field is security fully considered. This paper reviews the relevant literature regarding the use of the IoT in the built environment and analyses current practices. It also presents examples of cities that use the IoT to improve construction and the lived experience. Finally, it reviews how digital twins factor in multiple layers defined in CPSs, from physical objects to information models. Based on this review, recommendations are provided documenting how BIM specifications can be expanded to become IoT compliant, enhancing standards to support cybersecurity, and ensuring digital twin and city standards can be fully integrated in future secure smart cities.

Surgical and endovascular hybrid approach in peripheral arterial disease of the lower limbs

VASA ◽  
2016 ◽  
Vol 45 (5) ◽  
pp. 417-422 ◽  
Author(s):  
Anouk Grandjean ◽  
Katia Iglesias ◽  
Céline Dubuis ◽  
Sébastien Déglise ◽  
Jean-Marc Corpataux ◽  
...  
Keyword(s):  
Mortality Rate ◽  
Peripheral Arterial Disease ◽  
Limb Salvage ◽  
Hybrid Approach ◽  
Arterial Disease ◽  
Early Mortality ◽  
Secondary Patency ◽  
Limb Salvage Rate ◽  
Peripheral Arterial ◽  
Salvage Rate

Abstract. Background: Multilevel peripheral arterial disease is frequently observed in patients with intermittent claudication or critical limb ischemia. This report evaluates the efficacy of one-stage hybrid revascularization in patients with multilevel arterial peripheral disease. Patients and methods: A retrospective analysis of a prospective database included all consecutive patients treated by a hybrid approach for a multilevel arterial peripheral disease. The primary outcome was the patency rate at 6 months and 1 year. Secondary outcomes were early and midterm complication rate, limb salvage and mortality rate. Statistical analysis, including a Kaplan-Meier estimate and univariate and multivariate Cox regression analyses were carried out with the primary, primary assisted and secondary patency, comparing the impact of various risk factors in pre- and post-operative treatments. Results: 64 patients were included in the study, with a mean follow-up time of 428 days (range: 4 − 1140). The technical success rate was 100 %. The primary, primary assisted and secondary patency rates at 1 year were 39 %, 66 % and 81 %, respectively. The limb-salvage rate was 94 %. The early mortality rate was 3.1 %. Early and midterm complication rates were 15.4 % and 6.4 %, respectively. The early mortality rate was 3.1 %. Conclusions: The hybrid approach is a major alternative in the treatment of peripheral arterial disease in multilevel disease and comorbid patients, with low complication and mortality rates and a high limb-salvage rate.

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