Wireless sensor networks(WSN)are widely used in many situations,but the disordered and random deployment mode will waste a lot of sensor resources.This paper proposes a multi-topology hierarchical collaborative partic...Wireless sensor networks(WSN)are widely used in many situations,but the disordered and random deployment mode will waste a lot of sensor resources.This paper proposes a multi-topology hierarchical collaborative particle swarm optimization(MHCHPSO)to optimize sensor deployment location and improve the coverage of WSN.MHCHPSO divides the population into three types topology:diversity topology for global exploration,fast convergence topology for local development,and collaboration topology for exploration and development.All topologies are optimized in parallel to overcome the precocious convergence of PSO.This paper compares with various heuristic algorithms at CEC 2013,CEC 2015,and CEC 2017.The experimental results show that MHCHPSO outperforms the comparison algorithms.In addition,MHCHPSO is applied to the WSN localization optimization,and the experimental results confirm the optimization ability of MHCHPSO in practical engineering problems.展开更多
The study of delicate nano-topological structures has been a prominent area of research,largely due to the distinctive electromagnetic characteristics of this structure.However,the relationship between topo-logical tr...The study of delicate nano-topological structures has been a prominent area of research,largely due to the distinctive electromagnetic characteristics of this structure.However,the relationship between topo-logical transformations,material properties,and electromagnetic wave(EMW)absorption performance remains insufficiently understood.In this study,a series of carbon fiber-based Co/MnO nanocomposites is derived from Co/Mn bimetal Prussian blue analogs encapsulated in polymer nanofiber networks by electrospinning.It has been demonstrated that various topological shapes can be modulated by modulat-ing surfactants,thereby changing the degree of graphitization and electrical conductivity.The optimized spherical precursor composite carbon fiber exhibits superior EMW absorption capability with minimum reflection loss(RL_(min))of-58.15 dB with a thickness of 2.3 mm.Moreover,ultrabroad effective absorption bandwidth(EAB)as large as 8.96 GHz is obtained.This work offers a significant contribution to the field of topology,while also promoting the development of manganese-based microwave-absorbing materials(MAMs)with enhanced electromagnetic absorption properties.展开更多
基金supported by the National Key Research and Development Program Projects of China(No.2018YFC1504705)the National Natural Science Foundation of China(No.61731015)+1 种基金the Major instrument special project of National Natural Science Foundation of China(No.42027806)the Key Research and Development Program of Shaanxi(No.2022GY-331)。
文摘Wireless sensor networks(WSN)are widely used in many situations,but the disordered and random deployment mode will waste a lot of sensor resources.This paper proposes a multi-topology hierarchical collaborative particle swarm optimization(MHCHPSO)to optimize sensor deployment location and improve the coverage of WSN.MHCHPSO divides the population into three types topology:diversity topology for global exploration,fast convergence topology for local development,and collaboration topology for exploration and development.All topologies are optimized in parallel to overcome the precocious convergence of PSO.This paper compares with various heuristic algorithms at CEC 2013,CEC 2015,and CEC 2017.The experimental results show that MHCHPSO outperforms the comparison algorithms.In addition,MHCHPSO is applied to the WSN localization optimization,and the experimental results confirm the optimization ability of MHCHPSO in practical engineering problems.
基金supported by the National Natural Science Foundation of China(Nos.52377026 and 52301192)the Taishan Scholars and Young Experts Program of Shandong Province(No.tsqn202103057)+4 种基金the Natural Science Foundation of Shan-dong Province(Nos.ZR2024ME046 and ZR2024QE313)Postdoc-toral Fellowship Program of CPSF(No.GZB20240327)the Post-doctoral Science Foundation of Shandong Province(No.SDCX-ZG-202400275)the Qingdao Postdoctoral Application Research Project(No.QDBSH20240102023)Postdoctoral Science Foundation of China(Nos.2024M751563 and 2024M761554).
文摘The study of delicate nano-topological structures has been a prominent area of research,largely due to the distinctive electromagnetic characteristics of this structure.However,the relationship between topo-logical transformations,material properties,and electromagnetic wave(EMW)absorption performance remains insufficiently understood.In this study,a series of carbon fiber-based Co/MnO nanocomposites is derived from Co/Mn bimetal Prussian blue analogs encapsulated in polymer nanofiber networks by electrospinning.It has been demonstrated that various topological shapes can be modulated by modulat-ing surfactants,thereby changing the degree of graphitization and electrical conductivity.The optimized spherical precursor composite carbon fiber exhibits superior EMW absorption capability with minimum reflection loss(RL_(min))of-58.15 dB with a thickness of 2.3 mm.Moreover,ultrabroad effective absorption bandwidth(EAB)as large as 8.96 GHz is obtained.This work offers a significant contribution to the field of topology,while also promoting the development of manganese-based microwave-absorbing materials(MAMs)with enhanced electromagnetic absorption properties.
