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Geographic information science in the era of geospatial big data: A cyberspace perspective

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The Innovation 2022年第5期3卷 21-22页

作者： Xintao Liu Min Chen Christophe Claramunt Michael batty Mei-Po Kwan Ahmad MSenousi Tao Cheng Josef Strobl Arzu Cöltekin John Wilson Temenoujka bandrova Milan Konecny Paul MTorrens Fengyuan Zhang Li He Jinfeng Wang Carlo Ratti Olaf Kolditz Alexander Klippel Songnian Li Hui Lin Guonian Lu Department of Land Surveying and Geo-Informatics Hong Kong Polytechnic UniversityHong Kong SARKowloonChina Key Laboratory of Virtual Geographic Environment(Ministry of Education of PRC) Nanjing Normal UniversityNanjing 210023China The French Naval Academy Research Institute 29240 Lanveoc-PoulmicFrance The Bartlett Centre for Advanced Spatial Analysis(CASA) University College London(UCL)WC1E 6BT LondonUK Institute of Space and Earth Information Science The Chinese University of Hong KongHong Kong SARShatin 999077China Department of Civil Engineering Cairo University12613 CairoEgypt SpaceTimeLab Department of CivilEnvironmental and Geomatic EngineeringUniversity College London(UCL)WC1E 6BT LondonUK Department of Geoinformatics University of Salzburg5020 SalzburgAustria Institute of Interactive Technologies(IIT) University of Applied Sciences and Arts Northwestern Switzerland FHNW5210 WindischSwitzerland Spatial Sciences Institute University of Southern CaliforniaLos AngelesCA 90007USA Laboratory on Cartography Department of Photogrammetry and CartographyUniversity of ArchitectureCivil Engineering and Geodesy1164 SofiaBulgaria Laboratory on Geoinformatics and Cartography Department of GeographyMasaryk University61137 BrnoCeskáRepublika Computer Science and Engineering Tandon School&Center for Urban Science+ProgressNew York UniversityNew YorkNY 10012USA School of Humanities and Social Science Xi’an Jiaotong UniversityXi’an 710049China Institute of Geographic Sciences and Natural Resources Research Chinese Academy of SciencesBeijing 100101China Department of Urban Studies and Planning Massachusetts Institute of TechnologyCambridgeMA 02139USA Centre for Environmental Research Helmholtz Centre for Environmental Research-UFZ04318 LeipzigGermany Laboratory of Geo-information Science and Remote Sensing Wageningen University&ResearchWageningen 6708the Netherlands Department of Civil Engineering Toronto Metropolitan UniversityTorontoON M5B 2K3Canada School of Geography and Env

The advent of information and communication technology and the Internet of Things have led our society toward a digital *** proliferation of personal computers,smartphones,intelligent autonomous sensors,and pervasive network interactions with individuals have gradually shifted human activities from offline to online and from in person to *** transformation has brought a series of challenges in a variety of fields,such as the dilemma of placelessness,some aspects of timelessness(no time relevance),and the changing relevance of distance in the field of geographic information science(GIscience).In the last two decades,“cyber thinking”in GIscience has received significant attention from different *** instance,human activities in“cyberspace”need to be reconsidered when coupled with the geographic space to ob.erve the first law of geography.

关键词： computer cyber instance

A Survey on Semantic Communications for Intelligent Wireless Networks

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arXiv 2022年

作者： Iyer, Sridhar Khanai, Rajashri Torse, Dattaprasad Pandya, Rahul Jashvantbhai Rab.e, Khaled Pai, Krishna Khan, Wali Ullah Fadlullah, Zubair Department of ECE KLE Dr. M.S. Sheshgiri College of Engineering and Technology Karnataka Belagavi India Department of CSE KLE Dr. M.S. Sheshgiri College of Engineering and Technology Karnataka Belagavi India Department of EE Indian Institute of Technology-Dharwad WALMI Campus PB Road Karnataka India Department of Engineering Manchester Metropolitan University Manchester United Kingdom University of Luxembourg Luxembourg City1855 Luxembourg Department of Computer Science ATAC Building Room AT5024 Lakehead University ONP7B 5E1 Canada

With the upsurge in next-generation intelligent applications and exponentially increasing heterogeneous data traffic both, the industry and the research community have already begun conceptualizing the 6G technology. With deployment of the 6G technology, it is envisioned that the competitive edge of wireless technology will be sustained and the next decade's communication requirements will be stratified. Also, the 6G technology will aim to aid the development of a human society which is ubiquitous, intelligent, and mobile, simultaneously providing solutions to key challenges such as, coverage, capacity, providing intelligence, computing, etc. In addition, 6G technology will focus on providing the intelligent use-cases and applications using higher data-rates over the mill-meter (mm) waves and Tera-Hertz (THz) frequency. However, at higher frequencies multiple non-desired phenomena such as atmospheric absorption, blocking, etc., occur which create a bottleneck owing to resource (spectrum and energy) scarcity. Hence, following the same trend of making efforts towards reproducing at the receiver, the exact information which was sent by the transmitter, will result in a never ending need for higher bandwidth. A possib.e solution to such a challenge lies in semantic communications which focuses on the meaning (relevance/context) of the received data as opposed to only reproducing the correct transmitted data. This in turn will require less bandwidth, and will reduce the bottleneck due to the various undesired phenomenon. In this respect, the current article presents a detailed survey on the recent technological trends in regard to semantic communications for intelligent wireless networks. We focus on the semantic communications architecture including the model, and source and channel coding. Next, we detail the cross-layer interaction, and the various goal-oriented communication applications. We also present the overall semantic communications trends in detail, and ident

关键词： Wireless networks

Uplink NOMA for STAR-RIS networks

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arXiv 2021年

作者： Zuo, Jiakuo Liu, Yuanwei Ding, Zhiguo Wang, Xianbin School of Internet of Things Nanjing University of Posts and Telecommunications Nanjing210003 China China Information Consulting and Designing Institute CO. LTD Nanjing210019 China School of Electronic Engineering and Computer Science Queen Mary University of London LondonE1 4NS United Kingdom School of Electrical and Electronic Engineering University of Manchester Manchester United Kingdom Department of Electrical and Computer Engineering Western University LondonONN6A 5B9 Canada

A simultaneously transmitting and reflecting reconfigurab.e intelligent surfaces (STAR-RISs) enhanced uplink non-orthogonal multiple access (NOMA) communication system is proposed. A total power consumption minimization prob.em is formulated by jointly optimizing the transmit-power of users, receive-beamforming vectors at the base station (bS), STAR-beamforming vectors at the STAR-RIS and time slots. Here, the STAR-beamforming introduced by STAR-RIS consists of transmission- and reflection-beamforming. To solve the formulated non-convex prob.em, an efficient penalty-based alternating optimization (P-AltOp) algorithm is proposed. Simulation results validate the effectiveness of the proposed scheme and reveal the effect of various system parameters on the total power consumption. Copyright © 2021, The Authors. All rights reserved.

关键词： electric power utilization

Deploying AbAC policies using RbAC systems

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JOURNAL OF computer SeCURITY 2019年第4期27卷 483-506页

作者： batra, Gunjan Atluri, Vijayalakshmi Vaidya, Jaideep Sural, Shamik [a] MSIS Department Rutgers Business School USA. E-mails: gunjan.batra@rutgers.edu jsvaidya@rutgers.edu atluri@rutgers.edu [b] Dept. of Computer Science and Engineering IIT Kharagpur India. E-mail: shamik@cse.iitkgp.ernet.in

The flexibility, portability and identity-less access control features of Attribute based Access Control (AbAC) make it an attractive choice to be employed in many application domains. However, commercially viab.e methods for implementation of AbAC do not exist while a vast majority of organizations use Role based Access Control (RbAC) or their temporal extensions, such as Temporal Role based Access Control (TRbAC). In this paper, we present a solution for organizations having a RbAC/TRbAC that can deploy an AbAC policy. essentially, we propose a method for the translation of an AbAC policy (including time constraints) into a form that can be adopted by an RbAC/TRbAC system. We experimentally demonstrate that time taken to evaluate an access request in RbAC and TRbAC systems is significantly less than that of the corresponding AbAC system. Since the cost of security management is more expensive under RbAC when compared to AbAC, we present an analysis of the different management costs and present mitigation approaches by considering various administrative operations.

关键词： AbAC TRbAC temporal RbAC time attributes deploying enabling

NOMA empowered Integrated Sensing and Communication

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arXiv 2021年

作者： Wang, Zhaolin Liu, Yuanwei Mu, Xidong Ding, Zhiguo Dob.e, Octavia A. The School of Electronic Engineering and Computer Science Queen Mary University of London LondonE1 4NS United Kingdom The School of Artificial Intelligence Beijing University of Posts and Telecommunications Beijing100876 China The School of Electrical and Electronic Engineering The University of Manchester ManchesterM13 9PL United Kingdom The Faculty of Engineering and Applied Science Memorial University St. John'sNLA1B 3X5 Canada

A non-orthogonal multiple access (NOMA) empowered integrated sensing and communication (ISAC) framework is investigated. A dual-functional base station serves multiple communication users employing NOMA, while the superimposed NOMA communication signal is simultaneously exploited for target sensing. A beamforming design prob.em is formulated to maximize the weighted sum of the communication throughput and the effective sensing power. To solve this prob.em, an efficient doub.e-layer penalty-based algorithm is proposed by invoking successive convex approximation. Numerical results show that the proposed NOMA-ISAC outperforms the conventional ISAC in the underloaded regime experiencing highly correlated channels and in the overloaded regime. Copyright © 2021, The Authors. All rights reserved.

关键词： beamforming

HIPHOMΕ: HIGH ORDeR PROJeCTION-bASeD HOMOGeNISATION FOR ADVeCTION DIFFUSION ReACTION PROb.eMS ∗

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arXiv 2023年

作者： Conni, Giovanni Piccardo, Stefano Perotto, Simona Porta, Giovanni Michele Icardi, Matteo Department of Computer Science KU Leuven Celestijnenlaan 200A Leuven3001 Belgium Department of Mechanical Engineering KU Leuven Celestijnenlaan 300b Leuven3001 Belgium CERMICS Ecole des Ponts Marne-la-Vallée77455 France Inria 2 rue Simone Iff Paris75589 France LaCàN Universitat Politècnica de Catalunya Barcelona08034 Spain MOX-Department of Mathematics Politecnico di Milano Piazza Leonardo da Vinci 32 MilanoI-20133 Italy Department of Civil and Environmental Engineering Politecnico di Milano Piazza Leonardo da Vinci 32 MilanoI-20133 Italy School of Mathematical Sciences University of Nottingham NG7 2RD United Kingdom

We propose a new model reduction technique for multiscale scalar transport prob.ems that exhibit dominant axial dynamics. To this aim, we rely on the separation of variab.es to combine a Hierarchical Model (HiMod) reduction with a two-scale asymptotic expansion. We extend the two-scale asymptotic expansion to an arbitrary order and exploit the high-order correctors to define the HiMod modal basis which approximates the transverse dynamics of the flow, while we adopt a finite element discretisation to model the leading stream. The resulting method, which is named HiPhomΕ (HIgh-order Projection-based HOMogenisation), is successfully assessed both in steady and unsteady advection-diffusion-reaction settings. The numerical results confirm the very good performance of HiPhomΕ which improves the accuracy and the convergence rate of HiMod and extends the reliability of the standard homogenised solution to transient and pre-asymptotic regimes. © 2023, CC bY-NC-ND.

关键词： Advection

Fully Automated 2D and 3D Convolutional Neural Networks Pipeline for Video Segmentation and Myocardial Infarction Detection in echocardiography

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arXiv 2021年

作者： Hamila, Oumaima Ramanna, Sheela Henry, Christopher J. Kiranyaz, Serkan Hamila, Ridha Mazhar, Rashid Hamid, Tahir Department of Applied Computer Science The University of Winnipeg 515 Portage Avenue WinnipegMBR3B 2E9 Canada Department of Electrical Engineering Qatar University Doha Qatar Thoracic surgery Hamad hospital Hamad Medical Corporation Qatar Cardiology Heart hospital Hamad Medical Corporation Qatar

Myocardial infarction (MI) is a life-threatening disorder that occurs due to a prolonged limitation of blood supply to the heart muscles, and which requires an immediate diagnosis to prevent death. To detect MI, cardiologists utilize in particular echocardiography, which is a non-invasive cardiac imaging that generates real-time visualization of the heart chambers and the motion of the heart walls. These videos enab.e cardiologists to identify almost immediately regional wall motion abnormalities (RWMA) of the left ventricle (LV) chamber, which are highly correlated with MI. However, data acquisition is usually performed during emergency which results in poor-quality and noisy data that can affect the accuracy of the diagnosis. To address the identified prob.ems, we propose in this paper an innovative, real-time and fully automated model based on convolutional neural networks (CNN) to early detect MI in a patient’s echocardiography. Our model is a pipeline consisting of a 2D CNN that performs data preprocessing by segmenting the LV chamber from the apical four-chamber (A4C) view, followed by a 3D CNN that performs a binary classification to detect MI. The pipeline was trained and tested on the HMC-QU dataset consisting of 162 echocardiography. The 2D CNN achieved 97.18% accuracy on data segmentation, and the 3D CNN achieved 90.9% accuracy, 100% precision, 95% recall, and 97.2% F1 score. Our detection results outperformed existing state-of-the-art models that were tested on the HMC-QU dataset for MI detection. This work demonstrates that developing a fully automated system for LV segmentation and MI detection is efficient and propitious. Copyright © 2021, The Authors. All rights reserved.

关键词： echocardiography

Revolutionising engineering pedagogy: The role of 3D printing in modern engineering education

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PLeT: Programmed Learning & educational Technology 2025年第2期62卷

作者： Muhammad Tajammal Munir Prashant K. Jamwal bing Li Susan Carter Shahid Hussain a College of Engineering and Technology American University of the Middle East Egaila Kuwait b Department of Electrical and Computer Engineering School of Engineering and Digital Sciences Nazarbayev University Astana Kazakhstan c Water Research Center Shenzhen International Graduate School Tsinghua University Shenzhen China d School of Critical Studies in Higher Education The University of Auckland Auckland New Zealand e Human-Centred Technology Research Center Faculty of Science and Technology University of Canberra Canberra Australia

AbSTRACTThis paper presents a comprehensive study on the integration of 3D printing technology in biomedical robotics education with undergraduate students learning about the design of robotic systems. The research investigated the effectiveness of this new teaching strategy in enhancing students’ understanding of complex engineering principles by comparing their learning experiences, and academic performance with results from traditional teaching methods. The students’ learning and performance were evaluated through a survey and grade analysis. The Mann – Whitney U test was used to analyse the data, revealing statistically significant improvements in both student satisfaction and grades. The Mann-Whitney U test results show a clear preference for the 2017 3D printing and project-based learning strategy over the 2016 traditional method. With a U-value of 0 and a critical U-value atp< 0.05 being 23, coupled with a z-score of −3.742, the data significantly indicates enhanced student outcomes with the newer teaching approach compared to conventional methods. The study also found that 3D printing technology fostered creativity, critical thinking, and enhanced spatial visualisation skills among students. However, we also identify potential challenges, including equipment maintenance, safety concerns, and the need for faculty expertise. The study concludes by providing potential strategies to overcome these challenges. This research offers valuab.e insights for educators and policy-makers in leveraging technology for improved learning outcomes in engineering education.

关键词： 3D printing engineering education pedagogical theories curriculum integration

Prediction of energy resolution in the JUNO experiment

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Chinese Physics C 2025年第1期49卷 35-59页

作者： Angel Abusleme Thomas Adam Kai Adamowicz Shakeel Ahmad Rizwan Ahmed Sebastiano Aiello Fengpeng An Qi An Giuseppe Andronico Nikolay Anfimov Vito Antonelli Tatiana Antoshkina Joao Pedro Athayde Marcondes de André Didier Auguste Weidong bai Nikita balashov Wander baldini Andrea barresi Davide basilico eric baussan Marco bellato Marco beretta Antonio bergnoli Daniel bick Lukas b.eger Svetlana biktemerova Thilo birkenfeld Iwan blake David blum Simon blyth Anastasia bolshakova Mathieu bongrand Clément bordereau Dominique b.eton Augusto brigatti Riccardo brugnera Riccardo bruno Antonio budano Jose busto Anatael Cab.era barbara Caccianiga Hao Cai Xiao Cai Yanke Cai Zhiyan Cai Stéphane Callier Steven Calvez Antonio Cammi Agustin Campeny Chuanya Cao Guofu Cao Jun Cao Rossella Caruso Cédric Cerna Vanessa Cerrone Jinfan Chang Yun Chang Auttakit Chatrabhuti Chao Chen Guoming Chen Pingping Chen Shaomin Chen Xin Chen Yiming Chen Yixue Chen Yu Chen Zelin Chen Zhangming Chen Zhiyuan Chen Zikang Chen Jie Cheng Yaping Cheng YuChin Cheng Alexander Chepurnov Alexey Chetverikov Davide Chiesa Pietro Chimenti Yen-Ting Chin Po-Lin Chou Ziliang Chu Artem Chukanov Gérard Claverie Catia Clementi barbara Clerbaux Marta Colomer Molla Selma Conforti Di Lorenzo Alberto Coppi Daniele Corti Simon Csakli Chenyang Cui Flavio Dal Corso Olivia Dalager Jaydeep Datta Christophe De La Taille Zhi Deng Ziyan Deng Xiaoyu Ding Xuefeng Ding Yayun Ding bayu Dirgantara Carsten Dittrich Sergey Dmitrievsky Tadeas Dohnal Dmitry Dolzhikov Georgy Donchenko Jianmeng Dong evgeny Doroshkevich Wei Dou Marcos Dracos Frédéric Druillole Ran Du Shuxian Du Katherine Dugas Stefano Dusini Hongyue Duyang Jessica eck Timo enqvist Andrea Fabbri Ulrike Fahrendholz Lei Fan Jian Fang Wenxing Fang Dmitry Fedoseev Li-Cheng Feng Qichun Feng Federico Ferraro Amélie Fournier Fritsch Fritsch Haonan Gan Feng Gao Feng Gao Alberto Garfagnini Arsenii Gavrikov Marco Giammarchi Nunzio Giudice Maxim Gonchar Guanghua Gong Hui Gong Yuri Gornushkin Marco Grassi Maxim Gromov Vasily Gromov Minghao G Yerevan Physics Institute YerevanArmenia Université Libre de Bruxelles BrusselsBelgium Universidade Estadual de Londrina LondrinaBrazil Pontificia Universidade Catolica do Rio de Janeiro Rio de JaneiroBrazil Millennium Institute for SubAtomic Physics at the High-energy Frontier(SAPHIR) ANIDChile Pontificia Universidad Católica de Chile SantiagoChile Beijing Institute of Spacecraft Environment Engineering BeijingChina Beijing Normal University BeijingChina China Institute of Atomic Energy BeijingChina Institute of High Energy Physics BeijingChina North China Electric Power University BeijingChina School of Physics Peking UniversityBeijingChina Tsinghua University BeijingChina University of Chinese Academy of Sciences BeijingChina Jilin University ChangchunChina College of Electronic Science and Engineering National University of Defense TechnologyChangshaChina Chongqing University ChongqingChina Dongguan University of Technology DongguanChina Jinan University GuangzhouChina Sun Yat-sen University GuangzhouChina Harbin Institute of Technology HarbinChina University of Science and Technology of China HefeiChina The Radiochemistry and Nuclear Chemistry Group in University of South China HengyangChina Wuyi University JiangmenChina Shandong University JinanChinaand Key Laboratory of Particle Physics and Particle Irradiation of Ministry of EducationShandong UniversityQingdaoChina Nanjing University NanjingChina Guangxi University NanningChina East China University of Science and Technology ShanghaiChina School of Physics and Astronomy Shanghai Jiao Tong UniversityShanghaiChina Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghaiChina Institute of Hydrogeology and Environmental Geology Chinese Academy of Geological SciencesShijiazhuangChina Nankai University TianjinChina Wuhan University WuhanChina Xi'an Jiaotong University Xi'anChina Xiamen University XiamenChina School of Physics and Microelectronics Zhengzhou UniversityZhengzhouChina Institute of Physics National

This paper presents an energy resolution study of the JUNO experiment,incorporating the latest knowledge acquired during the detector construction *** determination of neutrino mass ordering in JUNO requires an exceptional energy resolution better than 3% at 1 *** achieve this ambitious goal,significant efforts have b.en undertaken in the design and production of the key components of the JUNO *** factors affecting the detection of inverse beta decay signals have an impact on the energy resolution,extending beyond the statistical fluctuations of the detected number of photons,such as the properties of the liquid scintillator,performance of photomultiplier tubes,and the energy reconstruction *** account for these effects,a full JUNO simulation and reconstruction approach is *** enab.es the modeling of all relevant effects and the evaluation of associated inputs to accurately estimate the energy *** results of this study reveal an energy resolution of 2.95% at 1 ***,this study assesses the contribution of major effects to the overall energy resolution *** analysis serves as a reference for interpreting future measurements of energy resolution during JUNO data ***,it provides a guideline for comprehending the energy resolution characteristics of liquid scintillator-based detectors.

关键词： energy resolution liquid scintillator detector JUNO simulation reconstruction