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Detection of outliers with respect to a MUSIC geotechnical database

Canadian Geotechnical Journal 2024年第7期61卷 1275-1293页

作者： Ching, Jianye Phoon, Kok-Kwang Huang, Pengsheng Department of Civil Engineering National Taiwan University Taipei Taiwan Information Systems Technology and Design/Architecture and Sustainable Design Singapore University of Technology and Design Singapore

This study proposes a novel method that addresses a nontraditional class of outlier detection problems. The purpose of most outlier detection methods in the literature is to detect outliers within a dataset. A record can be considered an outlier if it is distinct from the regular records in the dataset. However, the purpose of the novel outlier detection method proposed in this study is to detect outlier data groups (a data group may denote a site or a project) with respect to a soil/rock property "MUSIC" database. A data group is an outlier group if its characteristics (mean, variance, correlation, or higher order dependency) are distinct from the regular data groups in the database. This study frames the outlier detection problem into a formal hypothesis testing problems with the null hypothesis that "the target data group is identically distributed as the regular groups in the database." With the hierarchical Bayesian model previously developed by the first two authors, the p-value for this hypothesis testing problem can be estimated rigorously. Numerical and real examples show that the p-value can effectively detect outlier data groups as well as outlier records with respect to a database. © 2024 The Author(s).

关键词： Database systems

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Thermal and uncertainty analysis of a lightweight floor with integrated TABS and ventilation system 18

Thermal and uncertainty analysis of a lightweight floor with...

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18th IBPSA Conference on Building Simulation, BS 2023

作者： Borkowski, Esther Lydon, Gearóid P. Schlueter, Arno Architecture and Building Systems Institute of Technology in Architecture ETH Zurich Zurich Switzerland Department of Architecture and Technology Faculty of Architecture and Design Norwegian University of Science and Technology Trondheim Norway

The HiLo living lab combines numerous novel multifunctional building elements, including a floor system that integrates TABS and ventilation system into complex geometry and lightweight structural components. The purpose of this study is to investigate the operational performance of the floor system and to compare it with the performance predicted by a white-box model in TRNSYS. Although the model can accurately and reliably predict the actual performance of the floor system with a median CV-RMSE index of 3.35%, the limited variability in the data and the unique conditions of the living lab may limit the generalisability of the model. © 2023 *** rights reserved.

关键词： Uncertainty analysis

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Safety evaluation of bottom cutting rescue technology of capsized vessels using FSI analysis technique 9th

Safety evaluation of bottom cutting rescue technology of cap...

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9th International Conference on Collision and Grounding of Ships and Offshore Structures, ICCGS 2023

作者： Lee, S.G. Lee, J.S. Park, C.B. Chung, Y.G. Marine Safety Technology Busan Korea Republic of Division of Naval Architecture ans Ocean Systems Engineering Korea Maritime and Ocean University Busan Korea Republic of

ISBN: (纸本)9781032611303

Three isolated crewmen were rescued by cutting the bottom of the fishing vessel, but the rescue technology was determined while its safety of the bottom cutting was not guaranteed on the judgment that underwater rescue and further delay was impossible due to poor underwater environment, low water temperature and inflow of seawater etc. The objective of this study is to carry out the safety assessment of rescue technology for the bottom cutting of capsized vessel using Marine Accident Integrated Analysis System (MAIAS;highly advanced M&S system of Fluid-Structure Interaction (FSI) analysis technology) together with buoyancy calculation using hydrostatic characteristic calculation program. © 2024 The Author(s).

关键词： Fisheries

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Light(Science & Applications) 2024年第2期13卷 333-346页

作者： Yifan Sun Qian Li Ling-Jun Kong Xiangdong Zhang Key Laboratory of advanced optoelectronic quantum architecture and measurements of Ministry of Education Beijing Key Laboratory of Nanophotonics&Ultrafine Optoelectronic SystemsSchool of PhysicsBeijing Institute of Technology100081BeijingChina

Compared with electrical neural networks,optical neural networks(ONNs)have the potentials to break the limit of the bandwidth and reduce the consumption of energy,and therefore draw much attention in recent *** far,several types of ONNs have been ***,the current ONNs cannot realize the acceleration as powerful as that indicated by the models like quantum neural *** to construct and realize an ONN with the quantum speedup is a huge ***,we propose theoretically and demonstrate experimentally a new type of optical convolutional neural network by introducing the optical *** is called the correlated optical convolutional neural network(COCNN).We show that the COCNN can exhibit“quantum speedup”in the training *** character is verified from the two *** is the direct illustration of the faster convergence by comparing the loss function curves of the COCNN with that of the traditional convolutional neural network(CNN).Such a result is compatible with the training performance of the recently proposed quantum convolutional neural network(QCNN).The other is the demonstration of the COCNN’s capability to perform the QCNN phase recognition circuit,validating the connection between the COCNN and the ***,we take the COCNN analog to the 3-qubit QCNN phase recognition circuit as an example and perform an experiment to show the soundness and the feasibility of *** results perfectly match the theoretical *** proposal opens up a new avenue for realizing the ONNs with the quantum speedup,which will benefit the information processing in the era of big data.

关键词： process quantum convolution

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Topologically protected entanglement switching around exceptional points

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Light(Science & Applications) 2024年第8期13卷 1631-1644页

作者： Zan Tang Tian Chen Xing Tang Xiangdong Zhang Key Laboratory of Advanced Optoelectronic Quantum Architecture and Measurements of Ministry of Education Beijing Key Laboratory of Nanophotonics&Ultrafine Optoelectronic SystemsSchool of PhysicsBeijing Institute of Technology100081 BeijingChina

The robust operation of quantum entanglement states is crucial for applications in quantum information,computing,and communications^(1–3).However,it has always been a great challenge to complete such a task because of decoherence and ***,we propose theoretically and demonstrate experimentally an effective scheme to realize robust operation of quantum entanglement states by designing quadruple degeneracy exceptional *** encircling the exceptional points on two overlapping Riemann energy surfaces,we have realized a chiral switch for entangled states with high *** to the topological protection conferred by the Riemann surface structure,this switching of chirality exhibits strong robustness against perturbations in the encircling ***,we have experimentally validated such a scheme on a quantum walk *** work opens up a new way for the application of non-Hermitian physics in the field of quantum information.

关键词： exceptional quantum Riemann

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The role of intelligent technology in the development of urban air mobility systems:A technical perspective

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Fundamental Research 2024年第5期4卷 1017-1024页

作者： Yang Liu Cheng Lyu Fan Bai Omkar Parishwad Ying Li Department of Architecture and Civil Engineering Chalmers University of TechnologyGothenburg SE-41296Sweden Chair of Transportation Systems Engineering Technical University of MunichMunich 80333Germany School of Information Engineering Chang'an UniversityXi'an 710010China

Urban Air Mobility(UAM)is an emerging transportation system that aims at revolutionizing urban mobility through the deployment of small electric vertical takeoff and landing(eVTOL)*** development of UAM is largely driven by advances in Intelligent technology(IT).This review article provides an overview of the UAM system and discusses the application of IT in *** challenges facing UAM are also identified,and an outlook on the future of this promising transportation system is *** main conclusions suggest that IT is a fundamental driver of UAM,enabling a range of applications such as air traffic management and autonomous drone ***,the UAM system is facing a number of challenges,including eVTOL technology,system integration issues,and noise *** these challenges,the future of UAM appears promising;as a disruptive transportation mode,UAM is expected to play an important role in addressing the growing demand of urban transportation in the coming decades.

关键词： Urban air mobility Intelligent technology Artificial intelligence Air traffic development Disruptive transportation mode

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Editorial for Machine learning and AI for underground metaverse

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Underground Space 2024年第6期19卷 1-3页

作者： Kok-Kwang Phoon Qiujing Pan Chong Tang Information Systems Technology and Design/Architecture and Sustainable Design Singapore University of Technology and DesignSingapore 487372 School of Civil Engineering Central South UniversityChangsha 410075China State Key Laboratory of Coastal and Offshore Engineering Dalian University of TechnologyDalian 116024China

It is widely recognized that civil engineering practice,including underground construction,is lagging the fast pace digital transformation taking place in many *** key reason for this revolution is the emergence and convergence of digital technologies that include machine learning,artificial intelligence(AI),blockchain,cloud/edge computing,Internet of Things,5G communication,automation,digital twin,and *** parallel,Industry 4.0 is now complemented by Industry 5.0 that advocates a shift from economic value to societal value(sustainability,well-being,etc.).This means a shift from enterprises benefiting shareholders(profits)to stakeholders(people).

关键词： learning artificial underground

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Impact of occupant autonomy on satisfaction and building energy efficiency

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Energy and Built Environment 2023年第4期4卷 377-385页

作者： Wipa Loengbudnark Kaveh Khalilpour Gnana Bharathy Alexey Voinov Leena Thomas Center on Persuasive Systems for Wise Adaptive Living Faculty of Engineering&ITUniversity of Technology SydneyNSW 2007Australia School of Architecture Faculty of DesignArchitecture and BuildingUniversity of Technology SydneyNSW 2007Australia Faculty of Engineering Technology University of Twentethe Netherlands

The philosophy of building energy management is going through a paradigm change from traditional,often inefficient,user-controlled systems to one that is centrally automated with the aid of IoT-enabled *** this context,occupants’perceived control and building automation may seem to be in *** inquiry of this study is rooted in a proposition that while building automation and centralized control systems are assumed to provide indoor comfort and conserve energy use,limiting occupants’control over their work environment may result in dissatisfaction,and in turn decrease *** assessing this hypothesis,data from the post-occupancy evaluation survey of a smart building in a university in Australia was used to analyze the relationships between perceived control,satisfaction,and perceived *** structural equation modeling,we have found a positive direct effect of occupants’perceived control on overall satisfaction with their working ***,perceived control exerts an influence on perceived productivity through ***,a field experiment conducted in the same building revealed the potential impact that occupant controllability can have on energy *** changed the default light settings from automatic on-and-offto manual-on and automatic-off,letting occupants choose themselves whether to switch the light on or ***,about half of the participants usually kept the lights off,preferring daylight in their *** also resulted in a reduction in lighting electricity use by 17.8%without any upfront investment and major technical *** findings emphasize the important role of perceived control on occupant satisfaction and productivity,as well as on the energy-saving potential of the user-in-the-loop automation of buildings.

关键词： Autonomy Occupant behavior Comfort preference Building energy management Human-in-the-loop automation

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Virtual reality technology for learning detailed design in landscape architecture

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Discover Education 2024年第1期3卷 1-15页

作者： Ha, Jaeyoung Alrayyan, Kawthar Alam, M. M. Lekhon Landscape Architecture Program Virginia Tech 121 Burruss Hall 800 Drillfield Drive Blacksburg 24061 VA United States Department of Technology Systems East Carolina University Greenville 27858 NC United States

There is much interest in employing computer technology in design professions and education. However, few attempts have been made to apply immersive visualization technology to learn design details in landscape architecture. This study aims to illuminate how virtual reality (VR) technology helps students with design details in landscape architecture. Students were given a course project to create 3D models such as boardwalk structures located in residential pond areas. Based on their 3D models, we asked 16 research participants to answer survey questionnaires about the perception of realism, scale, and effectiveness of using computer technology in semi-immersive environments (e.g., monitor display-based) as opposed to fully immersive environments (e.g., VR head-mounted display-based). The results of our study showed that students had a higher realism in fully immersive environments compared to semi-immersive environments. In terms of perception of scale, participants perceived the height of the simulated model to be higher than they had anticipated in fully immersive environments. While there were no statistically significant findings regarding the effectiveness of design evaluation in the two modalities, students mentioned that VR technology can effectively assist in creating design details, as it provides them with a better understanding of the spatial characteristics of models. © The Author(s) 2024.

关键词： 3D modeling Architectural construction Design education Desktop-VR Scale perception Virtual reality (VR)

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Adaptive Energy Optimization for Edge-Enabled Autonomous Mobile Robots 16

Adaptive Energy Optimization for Edge-Enabled Autonomous Mob...

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16th International Conference on COMmunication systems and NETworkS, COMSNETS 2024

作者： Mageshkumar, Vincent Baxi, Amit Natarajan, Venkat Murthy, Girish S. Intel Technology India Private Limited Systems Software & Architecture Research Intel Labs Bengaluru India

ISBN: (纸本)9798350383119

In this work, we propose an advanced energy consumption model for an Autonomous Mobile Robots and validate the model on a real-world robot testbed. We show how our model can enable intelligent offloading of computationally heavy functions from the robot to an Edge server, over a wireless network, to minimize robot's energy consumption and maximize operating time on battery. Furthermore, we also present practical scenarios to show how our energy model can enable real-time adaptation of the Edge robotics system to constraints such as compute availability on the Edge server, available wireless network bandwidth, robot-specific camera frame rate requirements, robot navigation speeds and thereby improve robot energy efficiency. We show the benefits of our approach by offloading computationally heavy SLAM function from robot to the Edge server in simulation and through experiments on a real-world hardware testbed. © 2024 IEEE.

关键词： AMR AMR Navigation Autonomous Mobile Robots Edge offload Edge Robotics Energy Efficiency Robotics

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