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检索条件"任意字段=2012 ASCE International Conference on Computing in Civil Engineering"

共 2005 条记录，以下是151-160 订阅

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A Convolutional Autoencoder Framework for Probabilistic Anomaly Detection on Infrastructure Systems

A Convolutional Autoencoder Framework for Probabilistic Anom...

引用

asce international conference on computing in civil engineering (I3CE)

作者： Gu, Yueyan Jazizadeh, Farrokh Virginia Tech Dept Civil & Environm Engn Blacksburg VA 24061 USA

ISBN: (数字)9780784485248

ISBN: (纸本)9780784485248

Data-driven autonomous anomaly detection, empowered by advanced sensing and machine learning techniques, has the potential to significantly reduce costs associated with infrastructure maintenance. In this paper, we studied the impact of probabilistic anomaly detection in the context of a proposed deep learning-empowered framework for multivariate time series anomaly detection. In this framework, two-dimensional convolutional autoencoders are utilized to learn the patterns of normal data and detect unseen anomalous data points that fail to be reconstructed by the well-trained autoencoders. Kernel density estimation was utilized to generate a probability distribution function based on raw window-based anomaly predictions. Our assessments showed promising performance in a real-world case study of Class I railroad track anomaly detection. We conducted a comparative study that proved our hypothesis that probabilistic anomaly detection outperforms the deterministic approach of anomaly detection using direct autoencoder output. Furthermore, the impact of multivariate time series data processing methods, autoencoder architecture, and anomaly score thresholds was also investigated.

关键词： Deep Learning Convolutional Autoencoders Anomaly Detection Railroad Track

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Automated Relation Extraction for Improved Generalizability across Different Types of Text

Automated Relation Extraction for Improved Generalizability ...

引用

asce international conference on computing in civil engineering (I3CE)

作者： Chen, Qiyang El-Gohary, Nora Univ Illinois Dept Civil & Environm Engn Urbana IL 61801 USA

ISBN: (数字)9780784485231

ISBN: (纸本)9780784485231

Bridge textual reports capture technically detailed data/information about bridge conditions and maintenance actions, which offers opportunities to improve the prediction of future bridge conditions for further bridge maintenance decision-making support. To automatically analyze these reports, there is a need for relation extraction methods to extract relation information from the reports for linking recognized entities with predefined semantic categories (e.g., caused by) and representing the extracted semantic relations in a structured way. To address this need, this paper proposes a deep learning-based relation extraction model. The proposed model utilizes convolutional neural network (CNN) to encode sentence-level features, and bidirectional long short-term memory (BiLSTM) to build a relation extractor to capture the patterns of the predefined relation types. The proposed model was evaluated in extracting relations from multiple types of bridge-related textual reports for representing bridge defect information-including relations among bridge entities-in a semantically rich structured way.

关键词： Artificial intelligence Natural language processing Information extraction Relation extraction Deep learning Bridge inspection Bridge conditions.

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Con-Metaverse: Its Potentiality, Challenges, and Possible Applications through NLP and Review

Con-Metaverse: Its Potentiality, Challenges, and Possible Ap...

引用

asce international conference on computing in civil engineering (I3CE)

作者： Park, Jisoo Yu, Chaeyoen Jang, Youjin Kim, Sungjin Indiana State Univ Dept Built Environm Terre Haute IN USA Hanbat Natl Univ Dept Architectural Engn Daejeon South Korea North Dakota State Univ Dept Civil Construct & Environm Engn Fargo ND USA

ISBN: (数字)9780784485231

ISBN: (纸本)9780784485231

With the COVID-19 pandemic accelerating the convergence of physical and digital, all aspects of real life are transformed into the infinite virtual world, the metaverse. As the metaverse takes shape and begins to mirror every piece of human experience, industries have started seeking transformational new opportunities beyond gaming. However, the utilization of metaverse in the construction industry is relatively low, while other sectors are already harvesting from the new unlimited world. To this end, this study first defines the noticeable features of the metaverse that are relevant to construction activities through systematic review and natural language process (NLP). Required technology milestones and critical challenges to realize the construction-metaverse (Con-Metaverse) are then identified through the NLP and review. The potential applications of the metaverse for construction are also discussed. This study is expected to expand the potentiality of metaverse to enhance its implementation in the construction industry.

关键词： Construction industry

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A Generic Safety and Efficiency-Oriented Platform for Managing Equipment Operations on Construction Sites

A Generic Safety and Efficiency-Oriented Platform for Managi...

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asce international conference on computing in civil engineering (I3CE)

作者： Khodabandelu, Ali Park, JeeWoong Ray, Unmesa Arteaga, Cristian Univ Nevada Dept Civil & Environm Engn & Construct Las Vegas NV 89154 USA

ISBN: (数字)9780784485248

ISBN: (纸本)9780784485248

Equipment pieces account for major aspects in construction projects, mainly safety, efficiency, time, and cost. Therefore, appropriate planning for their operations in advance of construction execution is of high criticality for project success. Despite the vast existing literature, there is lack of research on construction equipment, especially in regard to material supplies and their planning related to balancing safety and efficiency on complex sites that deal with a high number of interactive equipment pieces. Past research mostly has focused on one aspect only without sufficient consideration of the other. This study aims to develop a generic platform for managing daily equipment operations on construction sites by deploying an agent-based simulation model. During its attempt to improve time and efficiency aspects by proper distribution of material service requests on equipment units and efficient path planning and replanning for each equipment operation, the developed model respects the safety parameter by detecting and preventing any collisions between operating equipment pieces. Validation of the developed platform on an actual construction site with multiple equipment units has proved its significant capabilities in enhancing efficiency and time factors.

关键词： Construction equipment

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Investigating the Interplay between Indoor Environmental Quality and Workers' Health and Productivity: Preliminary Results

Investigating the Interplay between Indoor Environmental Qua...

引用

asce international conference on computing in civil engineering (I3CE)

作者： Awada, Mohamad Seyedrezaei, Mirmahdi Becerik-Gerber, Burcin Lucas, Gale Univ Southern Calif Dept Civil & Environm Engn Los Angeles CA 90089 USA Univ Southern Calif USC Inst Creat Technol Los Angeles CA USA

ISBN: (数字)9780784485248

ISBN: (纸本)9780784485248

This study aims to investigate the complex interplay between indoor environmental quality (IEQ) factors and their effects on workers' health, comfort, and productivity. Specifically, the study will identify the optimal range of IEQ conditions that can prevent or minimize sick building syndrome (SBS) and promote healthy buildings while maximizing comfort and productivity. For that, the full study will utilize a longitudinal, naturalistic real-world approach, combining granular data collection of perceived occupants' health and productivity states using ecological momentary assessments (EMAs) every 1 h, objective continuous heart rate data, and IEQ measurements in office spaces. By integrating physiological data into the study of SBS, the study aims to provide valuable insights into the long-term effects of IEQ on human health and productivity. Ultimately, the findings of this study can inform the development of effective strategies to improve IEQ and prevent SBS in office buildings, leading to healthier and more productive work environments.

关键词： Office buildings

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Breaking Down Barriers: A Study of Challenges to Adopting Powered Exoskeletons in the US Construction Industry

Breaking Down Barriers: A Study of Challenges to Adopting Po...

引用

asce international conference on computing in civil engineering (I3CE)

作者： Breneman, Madeline Ojha, Amit Jebelli, Houtan Simkins, Susan J. Akanmu, Abiola Penn State Univ Dept Architectural Engn University Pk PA 16802 USA Univ Illinois Dept Civil & Environm Engn Champaign IL 61820 USA Penn State Univ Dept Psychol University Pk PA USA Virginia Tech Myers Lawson Sch Construct Blacksburg VA USA

ISBN: (数字)9780784485224

ISBN: (纸本)9780784485224

Powered exoskeletons have the potential to reduce the physical demands on construction workers and enhance their abilities, yet adoption of this technology has been limited in the US construction sector. To that end, this study aimed to identify the barriers to the adoption of powered exoskeletons in the US construction industry. Firstly, a literature review was conducted to identify commercially available powered exoskeletons suitable for construction. Concurrently, questionnaires were developed and distributed among construction practitioners to understand the challenges associated with the implementation of powered exoskeletons in the US construction industry. The results showed that concerns about usability and productivity gains were the main barriers to the adoption of exoskeletons in the construction sector. The findings of this study provide valuable insights for improving the adoption and implementation of powered exoskeletons in the US construction industry, which could enhance worker safety and productivity.

关键词： Construction industry

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Motion-Based Control Interface for Intuitive and Efficient Teleoperation of Construction Robots

Motion-Based Control Interface for Intuitive and Efficient T...

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asce international conference on computing in civil engineering (I3CE)

作者： Rasheed, Usman Liang, Xiaoyun Cai, Jiannan Li, Shuai Hu, Yuqing Univ Texas San Antonio Sch Civil & Environm Engn & Construct Management San Antonio TX 78249 USA Penn State Univ Dept Architectural Engn State Coll PA USA

ISBN: (数字)9780784485224

ISBN: (纸本)9780784485224

Robotic teleoperation is regarded as a promising method of assisting workers in performing construction activities while avoiding potentially dangerous conditions. However, the control interface of conventional teleoperation systems relies on physical devices, such as a keyboard and joystick, to input control commands, which cannot be intuitively mapped to robot movement, and thus affecting the teleoperation performance of non-expert users. In this research, we present a novel human-robot interface to map human arm movement to robotic arm motion for intuitive teleoperation. Firstly, the human arm is tracked in real-time through a motion capturing system, that is, OptiTrack. The 3D location data is then streamed to robot operating system (ROS) and is used for motion planning of the robotic arm in MoveIt. Finally, the interface is demonstrated in a teleoperated pick-and-place task through robotic simulation, and the usability of the developed framework is compared to that of a joystick-based teleoperation system.

关键词： Remote control

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Developing a Computational Spatial Attention Metric to Examine Workers' Visual Search Efficiency at Hazardous Construction Jobsites

Developing a Computational Spatial Attention Metric to Exami...

引用

asce international conference on computing in civil engineering (I3CE)

作者： Lee, Kyeongsuk Shinde, Yugandhar Hasanzadeh, Sogand Esmaeili, Behzad Purdue Univ Lyles Sch Civil Engn W Lafayette IN 47907 USA Purdue Univ Sch Ind Engn W Lafayette IN USA

ISBN: (数字)9780784485248

ISBN: (纸本)9780784485248

Workers are required to efficiently distribute their limited attentional resources to the surrounding environment to maintain their situational awareness at hazardous jobsites. While previous studies have argued that the hazard identification performance of workers is significantly affected by their attentional allocation, no study empirically investigated the spatial attentional distribution for a successful search strategy. To address this gap, this study monitored 30 workers' visual search patterns within immersive 360. construction scenarios using eye-tracking technology. Incorporating a computer vision technique, a new spatial attention metric regarding effective search strategy was developed based on workers' visual search data. The results indicated that workers tended to distribute their attention to the narrow area limited to their field of view, and often, around 80% of 360. surroundings remained unattended, including behind and overhead areas. These findings highlighted the importance of designing a proper training program to improve workers' search efficiency and hazard identification performance.

关键词： Efficiency

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Development of a Blockchain Prototype for Collaborative Risk Assessment of Construction Projects

Development of a Blockchain Prototype for Collaborative Risk...

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asce international conference on computing in civil engineering (I3CE)

作者： Chung, In Bae Caldas, Carlos H. Univ Texas Austin Dept Civil Architectural & Environm Engn Austin TX 78712 USA

ISBN: (数字)9780784485224

ISBN: (纸本)9780784485224

This research explores the applicability of blockchain technology for collaborative risk assessment of capital projects through prototype development. Risk assessment is a collaborative process where project participants get together to assess and manage potential project risks. Different systems have been developed to support this collaborative risk assessment process. However, such systems are governed in a centralized manner and do not protect the confidentiality of individual inputs from the stakeholders. Moreover, the security and transparency of the data stored can become an issue as well. The research explains the development of a blockchain prototype to address the problems stated above. A private permissioned blockchain network has been configured so that risk-related information can be transacted in a secure, transparent, and trustable way. Smart contract algorithms have been developed to receive risk inputs from multiple stakeholders and update an aggregated output. The system architecture and the functionalities of the prototype are described in detail, and each step of the risk assessment process has been demonstrated on the prototype system. The research discusses the limitations of the current prototype and future work that can be done to improve collaborative risk assessment.

关键词： Risk assessment

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Investigating Personal Environmental Conditions for a Wheelchair User to Identify Disability-Related Inequity by Building Design and Maintenance

Investigating Personal Environmental Conditions for a Wheelc...

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asce international conference on computing in civil engineering (I3CE)

作者： Soni, Jhanvi McCullough, Steven Tanner Park, June Young Univ Texas Arlington Dept Earth & Environm Sci Arlington TX 76019 USA Univ Texas Arlington Dept Civil Engn Arlington TX 76019 USA

ISBN: (数字)9780784485224

ISBN: (纸本)9780784485224

The disability-related inequity has been identified in the built environment, causing discomfort in their essential routines. Current legislation focuses on building design and construction but not on the actual experiences of those with disabilities, like wheelchair users. These occupants encounter significant issues such as seat discomfort and unhealthy air quality due to their lower breathing zone. Although there are some research efforts on wheelchair user monitoring, there is limited information on the personal environmental conditions of wheelchair users, especially regarding their navigation in buildings. In this paper, we used WheelCom, an open source based toolkit to identify breathing and seat discomfort of a wheelchair user to assess actual perception and experience. We recruited a wheelchair user and installed WheelCom on the participant's wheelchair to follow the typical trajectory. Our outcomes would motivate architects, engineers, planners, and policymakers to rethink the accessibility and inclusion of buildings from the perspective of wheelchair users.

关键词： Wheelchairs

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