近年来,三维数字底座在城市空间监测和城市规划中的应用越来越广泛,如何快速构建大场景三维底座成为研究重点。本文研究了一种基于多源数据的建筑物LoD1.3级模型快速构建方法,通过建筑物DLG数据约束提取建筑物点云数据,计算顶部高程,基...近年来,三维数字底座在城市空间监测和城市规划中的应用越来越广泛,如何快速构建大场景三维底座成为研究重点。本文研究了一种基于多源数据的建筑物LoD1.3级模型快速构建方法,通过建筑物DLG数据约束提取建筑物点云数据,计算顶部高程,基于DEM数据提取建筑物底部高程,基于DLG、底部高程、顶部高程进行三维拉伸建模,实现了城市大场景建筑物LoD1.3级模型快速构建。实验表明:本文构建0.8 km 2建筑物密集区LoD1.3级三维模型耗时56.11 s,三维模型高程中误差为2.19 m,且具备属性信息。本文提出的基于多源数据的建筑物LoD1.3级模型快速构建方法已在实景三维常州建设中得到应用,有效提升了全域建筑三维模型建设效率。展开更多
The poor contact and side reactions between Li_(1.3)Al_(0.3)Ti_(1.7)(PO_(4))_(3)(LATP)and lithium(Li)anode cause uneven Li plating and high interfacial impendence,which greatly hinder the practical application of LATP...The poor contact and side reactions between Li_(1.3)Al_(0.3)Ti_(1.7)(PO_(4))_(3)(LATP)and lithium(Li)anode cause uneven Li plating and high interfacial impendence,which greatly hinder the practical application of LATP in high-energy density solid-state Li metal batteries.In this work,a multifunctional ferroelectric BaTiO_(3)(BTO)/poly(vinylidene fluoride-co-trifluoroethylene-co-chlorotrifluoroethylene)(P[VDF-TrFE-CTFE])composite interlayer(B-TERB)is constructed between LATP and Li metal anode,which not only suppresses the Li dendrite growth,but also improves the interfacial stability and maintains the intimate interfacial contact to significantly decrease the interfacial resistance by two orders of magnitude.The B-TERB interlayer generates a uniform electric field to induce a uniform and lateral Li deposition,and therefore avoids the side reactions between Li metal and LATP achieving excellent interface stability.As a result,the Li/LATP@B-TERB/Li symmetrical batteries can stably cycle for 1800 h at 0.2 mA cm^(-2)and 1000 h at 0.5 mA cm^(-2).The solid-state LiFePO_(4)/LATP@B-TERB/Li full batteries also exhibit excellent cycle performance for 250 cycles at 0.5 C and room temperature.This work proposes a novel strategy to design multifunctional ferroelectric interlayer between ceramic electrolytes and Li metal to enable stable room-temperature cycling performance.展开更多
文摘近年来,三维数字底座在城市空间监测和城市规划中的应用越来越广泛,如何快速构建大场景三维底座成为研究重点。本文研究了一种基于多源数据的建筑物LoD1.3级模型快速构建方法,通过建筑物DLG数据约束提取建筑物点云数据,计算顶部高程,基于DEM数据提取建筑物底部高程,基于DLG、底部高程、顶部高程进行三维拉伸建模,实现了城市大场景建筑物LoD1.3级模型快速构建。实验表明:本文构建0.8 km 2建筑物密集区LoD1.3级三维模型耗时56.11 s,三维模型高程中误差为2.19 m,且具备属性信息。本文提出的基于多源数据的建筑物LoD1.3级模型快速构建方法已在实景三维常州建设中得到应用,有效提升了全域建筑三维模型建设效率。
基金supported by National Natural Science Foundation of China(No.U2001220)Local Innovative Research Teams Project of Guangdong Pearl River Talents Program(No.2017BT01N111)+1 种基金Shenzhen All-Solid-State Lithium Battery Electrolyte Engineering Research Center(XMHT20200203006)Shenzhen Technical Plan Project(Nos.RCJC20200714114436091,JCYJ20180508152210821,and JCYJ20180508152135822).
文摘The poor contact and side reactions between Li_(1.3)Al_(0.3)Ti_(1.7)(PO_(4))_(3)(LATP)and lithium(Li)anode cause uneven Li plating and high interfacial impendence,which greatly hinder the practical application of LATP in high-energy density solid-state Li metal batteries.In this work,a multifunctional ferroelectric BaTiO_(3)(BTO)/poly(vinylidene fluoride-co-trifluoroethylene-co-chlorotrifluoroethylene)(P[VDF-TrFE-CTFE])composite interlayer(B-TERB)is constructed between LATP and Li metal anode,which not only suppresses the Li dendrite growth,but also improves the interfacial stability and maintains the intimate interfacial contact to significantly decrease the interfacial resistance by two orders of magnitude.The B-TERB interlayer generates a uniform electric field to induce a uniform and lateral Li deposition,and therefore avoids the side reactions between Li metal and LATP achieving excellent interface stability.As a result,the Li/LATP@B-TERB/Li symmetrical batteries can stably cycle for 1800 h at 0.2 mA cm^(-2)and 1000 h at 0.5 mA cm^(-2).The solid-state LiFePO_(4)/LATP@B-TERB/Li full batteries also exhibit excellent cycle performance for 250 cycles at 0.5 C and room temperature.This work proposes a novel strategy to design multifunctional ferroelectric interlayer between ceramic electrolytes and Li metal to enable stable room-temperature cycling performance.
