多模态语义分割网络可以利用不同模态中的互补数据提升分割精度,但现有的多模语义分割模型多为将两种模态数据简单拼接起来,忽略了不同模态数据在高低频中的特征特性,导致跨模态特征提取不充分,融合不理想。针对上述问题,提出了将IRRG...多模态语义分割网络可以利用不同模态中的互补数据提升分割精度,但现有的多模语义分割模型多为将两种模态数据简单拼接起来,忽略了不同模态数据在高低频中的特征特性,导致跨模态特征提取不充分,融合不理想。针对上述问题,提出了将IRRG图像与DSM图像融合的遥感图像语义分割网络LHFNet(low feature and high feature fusion network)。针对各模态图像低频相关的结构特征,设计了低级特征提取加强模块,以加强不同模态特征的提取;基于各模态图像高频相互独立的细节特征,设计了高级特征融合模块,以指导不同模态的特征融合;针对高低频图像特征之间的语义鸿沟,设计了全局空洞空间金字塔池化模块跳跃连接高低频信息,以增强高低频图像特征之间的信息交互。通过基于ISPRS提供的Vaihingen和Potsdam数据集上的实验表明,LHFNet分别取得了88.17%和90.53%的全局精确度,相较于SegNet、DeepLabv3+等单模分割网络和RedNet、TSNet等多模RGB-D分割网络都具有更高的分割精确度。展开更多
Time-Sensitive Network(TSN)with deterministic transmission capability is increasingly used in many emerging fields.It mainly guarantees the Quality of Service(QoS)of applications with strict requirements on time and s...Time-Sensitive Network(TSN)with deterministic transmission capability is increasingly used in many emerging fields.It mainly guarantees the Quality of Service(QoS)of applications with strict requirements on time and security.One of the core features of TSN is traffic scheduling with bounded low delay in the network.However,traffic scheduling schemes in TSN are usually synthesized offline and lack dynamism.To implement incremental scheduling of newly arrived traffic in TSN,we propose a Dynamic Response Incremental Scheduling(DR-IS)method for time-sensitive traffic and deploy it on a software-defined time-sensitive network architecture.Under the premise of meeting the traffic scheduling requirements,we adopt two modes,traffic shift and traffic exchange,to dynamically adjust the time slot injection position of the traffic in the original scheme,and determine the sending offset time of the new timesensitive traffic to minimize the global traffic transmission jitter.The evaluation results show that DRIS method can effectively control the large increase of traffic transmission jitter in incremental scheduling without affecting the transmission delay,thus realizing the dynamic incremental scheduling of time-sensitive traffic in TSN.展开更多
网络虚拟化允许多个虚拟网络在同一物理基础设施上共存,有利于未来网络技术的增量部署。然而,当前可编程数据平面提供独占的数据平面抽象难以同时支持多个网络功能,该文提出一种支持并行流水线的虚拟化可编程数据平面结构(Virtualized P...网络虚拟化允许多个虚拟网络在同一物理基础设施上共存,有利于未来网络技术的增量部署。然而,当前可编程数据平面提供独占的数据平面抽象难以同时支持多个网络功能,该文提出一种支持并行流水线的虚拟化可编程数据平面结构(Virtualized P4-based Programmable Data Plane architecture with Parallel Pipeline,VirtP6),允许在单个物理设备上运行多个相互隔离的网络功能。VirtP6改变了可编程数据平面的单一流水线结构,引入并行的多个数据包处理流水线,实现了可编程数据平面的虚拟化,并保证了不同虚拟网络功能之间的资源隔离、流量隔离和访问隔离。最后,针对VirtP6的虚拟化开销、隔离性、可扩展性、网络适用性能进行实验评估。实验结果显示,与HyperP4相比,VirtP6大大降低了虚拟化开销,将延迟减少了68%,吞吐量提高了75%,具有良好的隔离性和扩展性。展开更多
文摘多模态语义分割网络可以利用不同模态中的互补数据提升分割精度,但现有的多模语义分割模型多为将两种模态数据简单拼接起来,忽略了不同模态数据在高低频中的特征特性,导致跨模态特征提取不充分,融合不理想。针对上述问题,提出了将IRRG图像与DSM图像融合的遥感图像语义分割网络LHFNet(low feature and high feature fusion network)。针对各模态图像低频相关的结构特征,设计了低级特征提取加强模块,以加强不同模态特征的提取;基于各模态图像高频相互独立的细节特征,设计了高级特征融合模块,以指导不同模态的特征融合;针对高低频图像特征之间的语义鸿沟,设计了全局空洞空间金字塔池化模块跳跃连接高低频信息,以增强高低频图像特征之间的信息交互。通过基于ISPRS提供的Vaihingen和Potsdam数据集上的实验表明,LHFNet分别取得了88.17%和90.53%的全局精确度,相较于SegNet、DeepLabv3+等单模分割网络和RedNet、TSNet等多模RGB-D分割网络都具有更高的分割精确度。
基金supported by the Innovation Scientists and Technicians Troop Construction Projects of Henan Province(224000510002)。
文摘Time-Sensitive Network(TSN)with deterministic transmission capability is increasingly used in many emerging fields.It mainly guarantees the Quality of Service(QoS)of applications with strict requirements on time and security.One of the core features of TSN is traffic scheduling with bounded low delay in the network.However,traffic scheduling schemes in TSN are usually synthesized offline and lack dynamism.To implement incremental scheduling of newly arrived traffic in TSN,we propose a Dynamic Response Incremental Scheduling(DR-IS)method for time-sensitive traffic and deploy it on a software-defined time-sensitive network architecture.Under the premise of meeting the traffic scheduling requirements,we adopt two modes,traffic shift and traffic exchange,to dynamically adjust the time slot injection position of the traffic in the original scheme,and determine the sending offset time of the new timesensitive traffic to minimize the global traffic transmission jitter.The evaluation results show that DRIS method can effectively control the large increase of traffic transmission jitter in incremental scheduling without affecting the transmission delay,thus realizing the dynamic incremental scheduling of time-sensitive traffic in TSN.
文摘网络虚拟化允许多个虚拟网络在同一物理基础设施上共存,有利于未来网络技术的增量部署。然而,当前可编程数据平面提供独占的数据平面抽象难以同时支持多个网络功能,该文提出一种支持并行流水线的虚拟化可编程数据平面结构(Virtualized P4-based Programmable Data Plane architecture with Parallel Pipeline,VirtP6),允许在单个物理设备上运行多个相互隔离的网络功能。VirtP6改变了可编程数据平面的单一流水线结构,引入并行的多个数据包处理流水线,实现了可编程数据平面的虚拟化,并保证了不同虚拟网络功能之间的资源隔离、流量隔离和访问隔离。最后,针对VirtP6的虚拟化开销、隔离性、可扩展性、网络适用性能进行实验评估。实验结果显示,与HyperP4相比,VirtP6大大降低了虚拟化开销,将延迟减少了68%,吞吐量提高了75%,具有良好的隔离性和扩展性。
