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Design of Resilient Sensor Networks Balancing Resilience and Efficiency

International Journal of Disaster Risk Science 2024年第1期15卷 107-115页

作者： Sergey N.Vecherin Kiril D.Ratmanski Luke Hogewood Igor Linkov Cold Regions research and Engineering Laboratory Engineering Research and Development CenterHanoverNH 03755USA Environmental Laboratory Engineering Research and Development CenterVicksburgMS 39180USA

In recent years,the notion of resilience has been developed and applied in many technical areas,becoming exceptionally pertinent to disaster risk science.During a disaster situation,accurate sensing information is the key to efficient recovery efforts.In general,resilience aims to minimize the impact of disruptions to systems through the fast recovery of critical functionality,but resilient design may require redundancy and could increase costs.In this article,we describe a method based on binary linear programming for sensor network design balancing efficiency with resilience.The application of the developed framework is demonstrated for the case of interior building surveillance utilizing infrared sensors in both twoand three-dimensional spaces.The method provides optimal sensor placement,taking into account critical functionality and a desired level of resilience and considering sensor type and availability.The problem formulation,resilience requirements,and application of the optimization algorithm are described in detail.Analysis of sensor locations with and without resilience requirements shows that resilient configuration requires redundancy in number of sensors and their intelligent placement.Both tasks are successfully solved by the described method,which can be applied to strengthen the resilience of sensor networks by design.The proposed methodology is suitable for large-scale optimization problems with many sensors and extensive coverage areas.

关键词： Binary linear programming Optimal sensor placement Redundant networks Resilience and efciency Resilient sensor networks

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Comparison of ERA5 turbulent fluxes at the air-sea interface with measurements from a wave-following platform

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Atmospheric and Oceanic Science Letters 2024年第3期17卷 32-36页

作者： Said Benjeddou Denis Bourras Christopher Luneau Aix Marseille Universite National Center for Scientific ResearchMediterranean Institute of OceanographyMarseilleFrance Observatory of the Sciences of the Universe Pytheas Institute National Center for Scientific ResearchMarseilleFrance

Turbulent fluxes at the air-sea interface were estimated with data collected in 2011-2020 with a low-profile platform named OCARINA during eight experiments in five regions:2011,2015,and 2016 in the Iroise Sea;2012 in the tropical Atlantic;2014 in the Chilie-Peru upwelling;2017 and 2018 in the Mediterranean Sea,and 2018 and 2020 in Barbados.The observations were carried out with moderate winds(2-10 m s^(-1))and average wave heights of 1.5 m.In this study,the authors used the fluxes calculated by the bulk method using OCARINA-sampled data as the input.These data can validate the fluxes estimated from ERAS reanalysis data.The OCARINA and ERA5 data were taken concomitantly.To do this,the authors established an algorithm to extract the OCARINA data as closely as possible to the reanalysis data in time and position.The measurements of the OCARINA platform can conclude on the relevance of the widely used reanalysis data.

关键词： Ocarina ECMWF ERA5 Turbulent fluxes Louis formulation

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The Combined Effects of High Temperatures and Ozone Pollution on Medical Emergency Calls—Jinan City,Shandong Province,China,2013–2019

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China CDC weekly 2024年第2期6卷 30-35,I0001-I0007页

作者： Huiyun Chang Chong Liu Xingyi Geng Xiumiao Peng Ke Huang Liheng Wang Liangliang Cui Department of scientific research and Education Jinan Municipal Center for Disease Control and PreventionJinan Municipal Center for Disease Control and Prevention Affiliated to Shandong UniversityJinan CityShandong ProvinceChina Jinan Health Well development center Jinan CityShandong ProvinceChina Department of Environmental Health Jinan Municipal Center for Disease Control and PreventionJinan CityShandong ProvinceChina Department of Emergency Jinan Medical Emergency CenterJinan CityShandong ProvinceChina

What is already known about this topic?Studies have extensively documented the separate and independent effects of extreme temperature and ozone on morbidity and mortality associated with respiratory and circulatory diseases.What is added by this report?The study revealed a significant association between elevated temperature,ozone pollution,and the combined effect of high temperature and ozone pollution with an increased risk of all-cause medical emergency calls(MECs)and MECs specifically related to neurological diseases.What are the implications for public health practice?Interventional measures should be implemented to mitigate exposure to high temperatures and ozone levels.Specifically,during the warm season,it is crucial for relevant authorities to focus on disseminating scientific information regarding the health impacts of elevated temperatures and ozone pollution.Additionally,timely public health advisories should be issued to alert the public effectively.

关键词： ozone elevated pollution

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Estimation of monthly global solar radiation over twelve major cities of Libya

Energy and Built Environment

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Energy and Built Environment 2024年第1期5卷 46-57页

作者： Alhassan Ali Teyabeen Najeya B.Elhatmi Akram A.Essnid F.Mohamed Libyan center for Solar Energy research and Studies TripoliLibya Libyan Authority of scientific research TripoliLibya

This study aims to estimate monthly averaged daily horizontal global solar radiation.Measured climatological data collected at twelve major cities located across Libya’s map were used to establish 7 different empirical models.The empirical coefficients of the models were calculated using the least square method.The accuracy of the models was evaluated using different statistical criteria such as Taylor diagram,mean absolute percentage error,MAPE,and root mean square error,RMSE.The results indicated that the sunshine duration-based models are more accurate than air temperature-based models,and the best performance was obtained by the quadratic regression model for all twelve Libyan cities.Moreover,this regression model can be used for the prediction of monthly mean horizontal global solar radiation at a specific site across Libya’s regions with minimum error.Furthermore,the results of the global solar irradiance produced by this method can be used for designing solar systems applications.

关键词： Monthly global solar radiation Clearness index Empirical models Performance evaluation Taylor diagram Libya

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Active disturbance rejection distributed secondary control for DC microgrids

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High Voltage 2024年第1期9卷 241-251页

作者： Jianlin Li Honghao You Shuo Liu Xingchen Li Ziyang Ding Fei Zou National User-Side Energy Storage Innovation research and development center North China University of TechnologyBeijingChina

A novel control scheme is presented to eliminate the negative effects of communication disturbances,which introduces active disturbance rejection control(ADRC)in the control strategy design to achieve the objectives of the restoration of the bus voltage and the sharing of the power even in the presence of disturbances and delays in communication.Simultaneously,its dynamic disturbance decoupling feature is used to realise the decoupling between power and voltage,so that the proposed controller only exchanges power information with its neighbours,reducing the communication burden and simplifying control structure.The control performance of the strategy is verified by employing steady-state analysis.The impact of controller parameters is studied by establishing a small signal model.Finally,both simulation cases and experimental tests prove the feasibility of this scheme.

关键词： Active disturbance establishing

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Architecture of Graphics System with 3D Acceleration Support for Embedded Operating Systems

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Tsinghua Science and Technology 2024年第3期29卷 863-873页

作者： Alexander Giatsintov Kirill Mamrosenko Pavel Bazhenov center of Visualization and Sattelite Information Technologies Scientific Research Institute for System Analysis of the Russian Academy of Sciences(SRISA RAS)Moscow 117218Russia

An increasing number of tasks now require the use of hardware accelerators to reduce the time required for computation and display the computational results.This paper presents a new graphics system architecture for operating systems(OSs)with microkernel architecture,including real-time OSs.The proposed system architecture provides capabilities for displaying graphical images on various information display devices and for accelerating graphical operations on GPU.The architecture of the graphics system uses a concept of allocators to manage system and video memory,provides an abstraction of memory operations with a single interface for video memory management,and simplifies memory handling where incorrect operation is the cause of many failures.A comparison between the performance of a real-time OS and Linux OS implementing the graphics system using the example of a glmark2 benchmark is presented,thereby the superiority of the proposed architecture in several scenarios is demonstrated.

关键词： real-time operating system(RTOS) graphics system rendering system architecture operatingsystem visualization system programming

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“以膜制膜”:三维聚吡咯纳米管阵列薄膜及其应用

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Science China Materials 2024年第4期67卷 1310-1319页

作者：陈盼盼尚薛杭天 center for scientific Facilities development and Management Research Center for Intelligent Sensing SystemsResearch Institute of Intelligent SensingZhejiang LabHangzhou 311121China

导电聚合物具有良好的导电性和化学稳定性等优异特性,在各种应用领域被广泛研究.三维导电聚合物具有相互连接的网络结构,可提供超高比表面积,是极具潜力的高性能材料结构.尽管纳米制造技术已取得飞速进展,但制备有序导电聚合物超结构,... 详细信息

导电聚合物具有良好的导电性和化学稳定性等优异特性,在各种应用领域被广泛研究.三维导电聚合物具有相互连接的网络结构,可提供超高比表面积,是极具潜力的高性能材料结构.尽管纳米制造技术已取得飞速进展,但制备有序导电聚合物超结构,如有序排列的纳米通道,仍极具挑战性.本研究提出了一种简便高效的模板合成法,可制备三维聚吡咯膜结构.以柔性径迹蚀刻聚碳酸酯膜为模板,通过化学聚合法,经去除模板即可获得具有垂直排列通道和连续连接层的三维纳米管阵列薄膜.膜结构中纳米通道长度、直径等微结构尺寸均可精细调控.这种“以膜制膜”的方法具通用性、成本低等特点.进一步,我们证明了该精密膜结构在毒害离子吸附、太阳能光热转换、毒害气体传感等方面应用的可能.该结构对六价铬离子表现出快速、优异的吸附性能;无需额外表面改性和基底结构辅助,可直接应用为界面太阳能光热转换材料;对毒害气体氨气展现出优异的传感响应.该工作不仅为聚比咯精细膜结构的制备提供了一种可行的方法,也极大地拓展了三维导电聚合物材料的应用.

关键词：导电聚合物纳米通道六价铬离子聚碳酸酯膜高性能材料膜结构有序排列垂直排列

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Comparison of ERA5 turbulent fluxes at the air-sea interface with measurements from a wave-following platform

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Atmospheric and Oceanic Science Letters 2024年第3期 34-38页

作者： Sa?d Benjeddou Denis Bourras Christopher Luneau Aix Marseille Université National Center for Scientific ResearchMediterranean Institute of Oceanography Observatory of the Sciences of the Universe Pythéas Institute National Center for Scientific Research

Turbulent fluxes at the air-sea interface were estimated with data collected in 2011-2020 with a low-profile platform named OCARINA during eight experiments in five regions:2011,2015,and 2016 in the Iroise Sea;2012 in the tropical Atlantic;2014 in the Chilie-Peru upwelling;2017 and 2018 in the Mediterranean Sea,and 2018 and 2020 in Barbados.The observations were carried out with moderate winds(2-10 m s-1) and average wave heights of 1.5 m.In this study,the authors used the fluxes calculated by the bulk method using OCARINA-sampled data as the input.These data can validate the fluxes estimated from ERAS reanalysis data.The OCARINA and ERA5 data were taken concomitantly.To do this,the authors established an algorithm to extract the OCARINA data as closely as possible to the reanalysis data in time and position.The measurements of the OCARINA platform can conclude on the relevance of the widely used reanalysis data.

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Wireless semantic communication based on semantic matching multiple access and intent bias multiplexing

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The Journal of China Universities of Posts and Telecommunications 2024年第1期31卷 26-36页

作者： Ren Chao He Zongrui Sun Chen Li Haojin Zhang Haijun University of Science and Technology Beijing Beijing 100083China research and development center Sony(China)LimitedBeijing 100027China

This paper proposes a multi-access and multi-user semantic communication scheme based on semantic matching and intent deviation to address the increasing demand for wireless users and data.The scheme enables flexible management of long frames,allowing each unit of bandwidth to support a higher number of users.By leveraging semantic classification,different users can independently access the network through the transmission of long concatenated sequences without modifying the existing wireless communication architecture.To overcome the potential disadvantage of incomplete semantic database matching leading to semantic intent misunderstanding,the scheme proposes using intent deviation as an advantage.This allows different receivers to interpret the same semantic information differently,enabling multiplexing where one piece of information can serve multiple users with distinct purposes.Simulation results show that at a bit error rate(BER)of 0.1,it is possible to reduce the transmission by approximately 20 semantic basic units.

关键词： semantic communication multiple access multiplexing multimodal communication

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Influence of syngas components and ash particles on the radiative heat transfer in a radiant syngas cooler

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Chinese Journal of Chemical Engineering 2024年第4期68卷 203-215页

作者： Chen Han Youmin Situ Huaxing Zhu Jianliang Xu Zhenghua Dai Guangsuo Yu Haifeng Liu National Energy Coal Gasification Technology research and development center East China University of Science and TechnologyShanghai 200237China Shanghai Engineering research center of Coal Gasification East China University of Science and TechnologyShanghai 200237China

Radiant syngas cooler(RSC)is widely used as a waste heat recovery equipment in industrial gasification.In this work,an RSC with radiation screens is established and the impact of gaseous radiative property models,gas components,and ash particles on heat transfer is investigated by the numerical simulation method.Considering the syngas components and the pressure environment of the RSC,a modified weighted-sum-of-gray-gases model was developed.The modified model shows high accuracy in validation.In computational fluid dynamics simulation,the calculated steam production is only 0.63%in error with the industrial data.Compared with Smith's model,the temperature decay along the axial direction calculated by the modified model is faster.Syngas components are of great significance to heat recovery capacity,especially when the absorbing gas fraction is less than 10%.After considering the influence of particles,the outlet temperature and the proportion of radiative heat transfer are less affected,but the difference in steam output reaches 2.7 t·h^(-1).The particle deposition on the wall greatly reduces the heat recovery performance of an RSC.

关键词： Radiant syngas cooler Weighted-sum-of-gray-gases model Numerical simulation Particle radiation

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