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A data fusion-based framework to integrate multi-source VGI in an authoritative land use database

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International Journal of Digital Earth 2021年第4期14卷 480-509页

作者： Lanfa Liu Ana-Maria Olteanu-Raimond Laurence Jolivet Arnaud-le Bris Linda See LASTIG Univ Gustave EiffelENSGIGNSaint-MandeFrance International Institute for Applied Systems Analysis(IIASA) LaxenburgAustria

Updating an authoritative Land Use and Land Cover(LULC)database requires many *** geographic information(VGI)involves citizens in the collection of data about their spatial *** is a growing interest in using existing VGI to update authoritative *** paper presents a framework aimed at integrating multi-source VGI based on a data fusion technique,in order to update an authoritative land use *** VGI data source is considered to be an independent source of information,which is fused together using Dempster-Shafer Theory(DST).The framework is tested in the updating of the authoritative land use data produced by the French National Mapping *** data sets were collected from several in-situ and remote campaigns run between 2018 and 2020 by contributors with varying *** data fusion approach achieved an overall accuracy of 85.6%for the 144 features having at least two contributions when the confidence threshold was set to *** the heterogeneity and limited amount of VGI used,the results are promising,with 99%of the LU polygons updated or *** results show the potential of using multi-source VGI to update or enrich authoritative LU data and potentially LULC data more generally。

关键词： Data fusion DempsterShafer Theory land use OCSGE volunteered geographic information

Determination of the Apparent Gas Permeability in a Macrocracked Concrete

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Engineering 2022年第10期17卷 93-98页

作者： Pierre Rossi Univ gustave eiffel French Institute of Science and Technology for TransportDevelopment and Networks(IFSTTAR)Marne-la-Vallée F-77447France

This paper reports on analysis of an expermental study that armed to determine the apparent gas permeability in cracked *** is a lack of research on this topic in the international literature,due to the difficulty of performing reliable experimental testing for gas *** principal interest of this work is to present new and reliable experimental *** functions between the evolution of the apparent crack permeability and the apparent crack opening are also *** functions appear to be relevant in consideration of Poiseuille theory.

关键词： Concrete Macrocrack Gas transfer Permeability

Reviewing trip purpose imputation in GPS-based travel surveys

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Journal of Traffic and Transportation Engineering(English Edition) 2020年第4期7卷 395-412页

作者： Minh Hieu Nguyen Jimmy Armoogum Jean-Loup Madre Cedric Garcia universite gustave eiffel/AME/DEST Marne la ValleeF-77447France Faculty of Transport Economics University of Transport and CommunicationsHanoiVietnam

The global positioning system(GPS)has motivated rapid advances in mobility data collection.A massive amount of spatio-temporal information has made it possible to know where a person was and when,but not how and why(s)he travelled,creating the need for inference *** with mode detection,purpose imputation has been insufficiently ***,the relative lack of attention to purpose identification does not mean that this field has not *** this paper,which is the first review dedicated to inferringtrip purposes from GPS data,1162 non-duplicate papers from four databases(Scopus,Web of Science,ScienceDirect and TRID)were screened,and a corpus of 25 publications was selected for *** on these papers,the purpose imputation problem is defined in the contexts of the evolution of GPS-based travel surveys and two research domains,transportation science(TS)and human geography(HG).Subsequently,three steps of the purpose detection process,namely trip end detection,input feature selection and main algorithms and validation,are *** these procedures,the differences between studies in TS and those in HG are ***,unresolved issues related to data and feature selection,algorithms and assessment are discussed substantially to provide potential research *** review may be an inform ative reference for those newly accessing the GPS-based purpose imputation field and/or intending to develop solutions to this problem.

关键词： Transportation engineering Travel survey GPS Purpose imputation Human geography Activity inference

Leveraging reinforcement learning for dynamic traffic control:A survey and challenges for field implementation

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Communications in Transportation Research 2023年第1期3卷 8-20页

作者： Yu Han Meng Wang Ludovic Leclercq School of Transportation Southeast UniversityNanjing211189China Faculty of Transport and Traffic Sciences Technische Universit at DresdenDresdenSaxony01067Germany LICIT-ECO7 UniversitéGustave EiffelENTPELyonF-69675France

In recent years,the advancement of artificial intelligence techniques has led to significant interest in reinforcement learning(RL)within the traffic and transportation *** traffic control has emerged as a prominent application field for RL in traffic *** paper presents a comprehensive survey of RL studies in dynamic traffic control,addressing the challenges associated with implementing RL-based traffic control strategies in practice,and identifying promising directions for future *** first part of this paper provides a comprehensive overview of existing studies on RL-based traffic control strategies,encompassing their model designs,training algorithms,and evaluation *** is found that only a few studies have isolated the training and testing environments while evaluating their RL ***,we examine the challenges involved in implementing existing RL-based traffic control *** investigate the learning costs associated with online RL methods and the transferability of offline RL methods through simulation *** simulation results reveal that online training methods with random exploration suffer from high exploration and learning ***,the performance of offline RL methods is highly reliant on the accuracy of the training *** limitations hinder the practical implementation of existing RL-based traffic control *** final part of this paper summarizes and discusses a few existing efforts which attempt to overcome these *** review highlights a rising volume of studies dedicated to mitigating the limitations of RL strategies,with the specific aim of enhancing their practical implementation in recent years.

关键词： Reinforcement learning Road traffic control Learning cost Transferability Sim-to-real transfer

Spatiotemporal dynamics of nanowire growth in a microfluidic reactor

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Microsystems & Nanoengineering 2021年第5期7卷 141-150页

作者： Mazen Erfan Martine Gnambodoe-Capochichi Yasser MSabry Diaa Khalil Yamin Leprince-Wang Tarik Bourouina ESYCOM CNRS UMR 9007Universite Gustave EiffelESIEE ParisNoisy-le-GrandFrance Ain Shams university Faculty of EngineeringECE DepartmentCairoEgypt

Co-integration of nanomaterials into microdevices poses several technological challenges and presents numerous scientific opportunities that have been addressed in this paper by integrating zinc oxide nanowires(ZnO-NWs)into a microfluidic *** addition to the applications of these combined materials,this work focuses on the study of the growth dynamics and uniformity of nanomaterials in a tiny microfluidic reactor environment.A unique experimental platform was built through the integration of a noninvasive optical charaaerization technique with the microfluidic *** platform allowed the unprecedented demonstration of time-resolved and spatially resolved monitoring of the in situ growth of NWs,in which the chemicals were continuously fed into the microfluidic *** platform was also used to assess the uniformity of NWs grown quickly in a 10-mm-wide microchamber,which was intentionally chosen to be 20 times wider than those used in previous attempts because it can accommodate applications requiring a large surface of interaction while still taking advantage of submillimeter *** observations included the effects of varying the flow rate on the NW diameter and length in addition to a synergetic effect of continuous renewal of the growth solution and the confined environment of the chemical reaction.

关键词： nanowires fluid dynamics

Resource Allocation to Minimize the Makespan with Multi-Resource Operations

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Journal of Systems Science & Complexity 2024年第5期37卷 2054-2070页

作者： WENG Wuyan CHU Chengbin WU Peng School of Economics and Management Fuzhou UniversityFuzhou 350108China Univ gustave eiffel ESIEE Paris&COSYS-GRETTIAF-77454 Marne-la-ValléeFrance

This paper investigates a new resource-allocation problem involving multi-resource operations,where completing an operation requires simultaneous use of multiple(renewable)resources,probably of different *** goal of the study is to provide a solution method that minimizes the *** authors formulate the problem into a novel mixed-integer linear program(MILP)*** efficiently solve practical-sized instances,an exact Benders decomposition algorithm is *** algorithm divides the original problem into a master problem of allocating resources and a subproblem of calculating the makespan,and both are linked via Benders *** convergence is sped up by improving the mathematical model and embedding the variable neighborhood search *** with CPLEX,a commonly used MILP solver,the computational results demonstrate that the proposed algorithm provides tighter upper and lower bounds in most *** particular,compared with CPLEX,the proposed method can on average improve the upper and lower bounds by 4.76%and 4.39%,respectively,in solving practical-sized instances.

关键词： Benders decomposition multi-resources operations resource allocation

Collaborative positioning for swarms:A brief survey of vision,LiDAR and wireless sensors based methods

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Defence Technology（防务技术） 2024年第3期33卷 475-493页

作者： Zeyu Li Changhui Jiang Xiaobo Gu Ying Xu Feng zhou Jianhui Cui College of Geodesy and Geomatics Shandong University of Science and TechnologyQingdao266590China Geoloc Laboratory Universite Gustave EiffelParis77454France School of Automation Guangdong University of TechnologyGuangzhou510006China

As positioning sensors,edge computation power,and communication technologies continue to develop,a moving agent can now sense its surroundings and communicate with other *** receiving spatial information from both its environment and other agents,an agent can use various methods and sensor types to localize *** its high flexibility and robustness,collaborative positioning has become a widely used method in both military and civilian *** paper introduces the basic fundamental concepts and applications of collaborative positioning,and reviews recent progress in the field based on camera,LiDAR(Light Detection and Ranging),wireless sensor,and their *** paper compares the current methods with respect to their sensor type,summarizes their main paradigms,and analyzes their evaluation ***,the paper discusses the main challenges and open issues that require further research.

关键词： Collaborative positioning Vision LiDAR Wireless sensors Sensor fusion

Derivation of FFT numerical bounds of the effective properties ofcomposites and polycristals

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Theoretical & Applied Mechanics Letters 2021年第2期11卷 94-101页

作者： Minh-Tan Nguyen Quy-Dong To Vincent Monchiet Univ gustave eiffel Univ Paris Est CreteilCNRSMSME UMR 8208F-77454 Marne-la-VallÃl’eFrance

In this paper,we provide exact fast Fourier transform(FFT)-based numerical bounds for the elastic prop-erties of composites having arbitrary *** bounds,an upper and a lower,are derivedby considering usual variational principles based on the strain and the stress *** bounds arecomputed by solving the Lippmann-Schwinger equation together with the shape coefficients which al-low an exact description of the microstructure of the *** coefficients are the exact Fouriertransform of the characteristic functions of the *** this study,the geometry of the microstructureis approximated by polygonals(two-dimensional,2D objects)and by polyhedrons(three-dimensional,3Dobjects)for which exact expressions of the shape coefficients are *** applications are pre-sented in the paper showing the relevance of the *** the first benchmark example,we considerthe case of a composite with *** effective elastic coefficients ares derived and compared,consider-ing the exact shape coefficient of the circular inclusion and its approximation with a ***,thehomogenized elastic coefficients are derived for a composite reinforced by 2D flower-shaped inclusionsand with 3D toroidal-shaped ***,the method is applied to polycristals considering Voronoitessellations for which the description with polygonals and polyhedrons becomes *** comparisonwith the original FFT method of Moulinec and Suquet is provided in order to show the relevance of thesenumerical bounds.

关键词： Composites Homogenization Fast Fourier transform Numerical bounds

Light People:Tarik Bourouina

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Light(Science & Applications) 2021年第9期10卷 1560-1564页

作者： Hui Wang Xiaoyi Liu Department of International Cooperation Changchun Institute of OpticsFine Mechanics and PhysicsChinese Academy of Sciences3888 Dong Nan Hu RoadChangchun130033China ESYCOM Lab UMR9007 CNRSUniversitéGustave Eiffel77454Marne-la-ValléeFrance

In 2015,195 countries of the United Nations proposed Sustainable Development Goals so as to alleviate the problems of climate change and global *** France,there is a scientist dedicated to contribute providing solutions for above issues by virtue of MEMS,Lab-On-Chip and *** expert is *** Bourouina,a Professor of Physics at ESIEE Paris,universitégustave *** devoted himself to the investigations on micro sensors and metamaterials,and kept seeking their applications in the future blueprint of“Sustainable”and“Smart”cities.

关键词： Smart devoted seeking