To adapt to the trend of increasing miniaturization and high integration of microelectronic equipments,there is a high demand for multifunctional thermally conductive(TC)polymeric films combining excellent flame retar...To adapt to the trend of increasing miniaturization and high integration of microelectronic equipments,there is a high demand for multifunctional thermally conductive(TC)polymeric films combining excellent flame retardancy and low dielectric constant(ε).To date,there have been few successes that achieve such a performance portfolio in polymer films due to their different and even mutually exclusive governing mechanisms.Herein,we propose a trinity strategy for creating a rationally engineered heterostructure nanoadditive(FG@CuP@ZTC)by in situ self-assembly immobilization of copper-phenyl phosphonate(CuP)and zinc-3,5-diamino-1,2,4-triazole complex(ZTC)onto the fluorinated graphene(FG)surface.Benefiting from the synergistic effects of FG,CuP,and ZTC and the bionic lay-by-lay(LBL)strategy,the as-fabricated waterborne polyurethane(WPU)nanocomposite film with 30 wt%FG@CuP@ZTC exhibits a 55.6%improvement in limiting oxygen index(LOI),66.0%and 40.5%reductions in peak heat release rate and total heat release,respectively,and 93.3%increase in tensile strength relative to pure WPU film due to the synergistic effects between FG,CuP,and ZTC.Moreover,the WPU nanocomposite film presents a high thermal conductivity(λ)of 12.7 W m^(−1) K^(−1) and a lowεof 2.92 at 106 Hz.This work provides a commercially viable rational design strategy to develop high-performance multifunctional polymer nanocomposite films,which hold great potential as advanced polymeric thermal dissipators for high-power-density microelectronics.展开更多
The hippocampal formation of the brain contains a series of nerve cells related to environmental cognition and navigation.These cells can integrate their moment information and external perceptual information and acqu...The hippocampal formation of the brain contains a series of nerve cells related to environmental cognition and navigation.These cells can integrate their moment information and external perceptual information and acquire episodic cognitive memory.Through episodic cognition and memory,organisms can achieve autonomous navigation in complex environments.This paper mainly studies the strategy of robot episode navigation in complex environments.After exploring the environment,the robot obtains subjective environmental cognition and forms a cognition map.The grid cells information contained in the cognitive map can obtain the direction and distance of the target through vector calculation,which can get a shortcut through the inexperienced area.The synaptic connection of place cells in the cognitive map can be used as the topological relationship between episode nodes.When the target-oriented vector navigation encounters obstacles,the obstacles can be realized by setting closer sub-targets.Based on the known obstacle information obtained from boundary cells in the cognitive map,topological paths can be divided into multi-segment vector navigation to avoid encountering obstacles.This paper combines vector and topological navigation to achieve goal-oriented and robust navigation capability in a complex environment.展开更多
基金financially supported by the Postdoctoral Fellowship Program of CPSF(Grant No.GZC20240372)China Postdoctoral Science Foundation(Grant No.2024M750728)+4 种基金Jiangsu Funding Program for Excellent Postdoctoral Talent(Grant No.2024ZB514)National Natural Science Foundation of China(Nos.21975185 and 51978239)Natural Science Foundation of Jiangsu Province(No.BK20220989)National Key R&D Program of China(Nos.2022YFC3203702 and 2023YFC3208900)the Australian Research Council(Nos.LP220100278,DP240102628 and DP240102728).
文摘To adapt to the trend of increasing miniaturization and high integration of microelectronic equipments,there is a high demand for multifunctional thermally conductive(TC)polymeric films combining excellent flame retardancy and low dielectric constant(ε).To date,there have been few successes that achieve such a performance portfolio in polymer films due to their different and even mutually exclusive governing mechanisms.Herein,we propose a trinity strategy for creating a rationally engineered heterostructure nanoadditive(FG@CuP@ZTC)by in situ self-assembly immobilization of copper-phenyl phosphonate(CuP)and zinc-3,5-diamino-1,2,4-triazole complex(ZTC)onto the fluorinated graphene(FG)surface.Benefiting from the synergistic effects of FG,CuP,and ZTC and the bionic lay-by-lay(LBL)strategy,the as-fabricated waterborne polyurethane(WPU)nanocomposite film with 30 wt%FG@CuP@ZTC exhibits a 55.6%improvement in limiting oxygen index(LOI),66.0%and 40.5%reductions in peak heat release rate and total heat release,respectively,and 93.3%increase in tensile strength relative to pure WPU film due to the synergistic effects between FG,CuP,and ZTC.Moreover,the WPU nanocomposite film presents a high thermal conductivity(λ)of 12.7 W m^(−1) K^(−1) and a lowεof 2.92 at 106 Hz.This work provides a commercially viable rational design strategy to develop high-performance multifunctional polymer nanocomposite films,which hold great potential as advanced polymeric thermal dissipators for high-power-density microelectronics.
基金National Natural Science Foundation of China,61773139,Fusheng Zha51521003,Fusheng Zha+6 种基金52075115,Fusheng ZhaU2013602,Fusheng Zha61911530250,Fusheng ZhaShenzhen Science and Technology Research and Development Foundation,JCYJ20190813171009236,Fusheng ZhaShenzhen Science and Technology Program,KQTD2016112515134654,Fusheng ZhaSelf-Planned Task of State Key Laboratory of Robotics and System(HIT),SKLRS202001B,Fusheng ZhaSKLRS202110B,Fusheng Zha.
文摘The hippocampal formation of the brain contains a series of nerve cells related to environmental cognition and navigation.These cells can integrate their moment information and external perceptual information and acquire episodic cognitive memory.Through episodic cognition and memory,organisms can achieve autonomous navigation in complex environments.This paper mainly studies the strategy of robot episode navigation in complex environments.After exploring the environment,the robot obtains subjective environmental cognition and forms a cognition map.The grid cells information contained in the cognitive map can obtain the direction and distance of the target through vector calculation,which can get a shortcut through the inexperienced area.The synaptic connection of place cells in the cognitive map can be used as the topological relationship between episode nodes.When the target-oriented vector navigation encounters obstacles,the obstacles can be realized by setting closer sub-targets.Based on the known obstacle information obtained from boundary cells in the cognitive map,topological paths can be divided into multi-segment vector navigation to avoid encountering obstacles.This paper combines vector and topological navigation to achieve goal-oriented and robust navigation capability in a complex environment.
