近年来MaaS (Mobility as a service)理念兴起并得到广泛研究,同时智能交通体系开始朝着自主化方向发展。发展自主式MaaS系统离不开对系统多维架构映射关系的设计和研究。在此背景下,本文首先根据服务域的通用标准定义,具象化MaaS系统...近年来MaaS (Mobility as a service)理念兴起并得到广泛研究,同时智能交通体系开始朝着自主化方向发展。发展自主式MaaS系统离不开对系统多维架构映射关系的设计和研究。在此背景下,本文首先根据服务域的通用标准定义,具象化MaaS系统服务集、参与组分和功能域。在此基础上,构建包括功能架构、逻辑架构、物理架构在内的系统多维架构,并设计架构内部和架构之间的多维映射关系。最后根据下一代际技术发展的趋势、功能和特点,对比分析不同代际下自主式MaaS系统架构映射关系的差异。展开更多
装配工装在飞机产品生产过程中处于飞机设计的下游,受到飞机装配件设计及其装配工艺的影响以及飞机生产准备周期限制,时间紧迫,任务繁重。传统的飞机装配工装以文本、二维图形式表达为主,信息是静态的,缺乏唯一的数据源易导致飞机-装配...装配工装在飞机产品生产过程中处于飞机设计的下游,受到飞机装配件设计及其装配工艺的影响以及飞机生产准备周期限制,时间紧迫,任务繁重。传统的飞机装配工装以文本、二维图形式表达为主,信息是静态的,缺乏唯一的数据源易导致飞机-装配工装协同变更管理效率低、准确性差,针对以上问题提出一种飞机-装配工装协同变更方法:利用基于模型的定义(Model based definition,MBD),建立了飞机和装配工装MBD模型关系架构,并结合相关的变更传播计算方法实现了飞机设计结构变更对装配工装变更影响的主动、自动化预测和分析。通过一套飞机壁板开口加强框的装配工装变更设计实例验证了该方法的可行性。展开更多
In the complex multicore chip system,network on-chip(NoC)is viewed as a kind of system interconnection that can substitute the traditional interconnect networks,which will improve the system performance and communicat...In the complex multicore chip system,network on-chip(NoC)is viewed as a kind of system interconnection that can substitute the traditional interconnect networks,which will improve the system performance and communication efficiency.With regard to the complex and large scale NoC,simple and efficient routing nodes are the critical factors to achieve low-cost and low-congestion communication performance.This paper proposes an unbuffered switch architecture and makes detailed analysis of the mechanism of buffer in the switch architecture.According to the simulation results,the S-mesh using the unbuffered switch architecture is better in terms of the optimal performance in message latency than some typical NoC architectures,such as 2D-mesh,Fat-tree,Butterfly,Octagon and so on.The synthesis results of design compiler indicate that the unbuffered switch has obvious advantages of achieving cost and operating speed for the chips.展开更多
文摘近年来MaaS (Mobility as a service)理念兴起并得到广泛研究,同时智能交通体系开始朝着自主化方向发展。发展自主式MaaS系统离不开对系统多维架构映射关系的设计和研究。在此背景下,本文首先根据服务域的通用标准定义,具象化MaaS系统服务集、参与组分和功能域。在此基础上,构建包括功能架构、逻辑架构、物理架构在内的系统多维架构,并设计架构内部和架构之间的多维映射关系。最后根据下一代际技术发展的趋势、功能和特点,对比分析不同代际下自主式MaaS系统架构映射关系的差异。
文摘装配工装在飞机产品生产过程中处于飞机设计的下游,受到飞机装配件设计及其装配工艺的影响以及飞机生产准备周期限制,时间紧迫,任务繁重。传统的飞机装配工装以文本、二维图形式表达为主,信息是静态的,缺乏唯一的数据源易导致飞机-装配工装协同变更管理效率低、准确性差,针对以上问题提出一种飞机-装配工装协同变更方法:利用基于模型的定义(Model based definition,MBD),建立了飞机和装配工装MBD模型关系架构,并结合相关的变更传播计算方法实现了飞机设计结构变更对装配工装变更影响的主动、自动化预测和分析。通过一套飞机壁板开口加强框的装配工装变更设计实例验证了该方法的可行性。
基金Supported by the National High Technology Research and Development Program of China(No.2009AA01Z105)the Ministry of EducationIntel Special Foundation for Information Technology(No.MOE-INTEL-08-05)the Postdoctoral Science Foundation of China(No.20080440942,200902432)
文摘In the complex multicore chip system,network on-chip(NoC)is viewed as a kind of system interconnection that can substitute the traditional interconnect networks,which will improve the system performance and communication efficiency.With regard to the complex and large scale NoC,simple and efficient routing nodes are the critical factors to achieve low-cost and low-congestion communication performance.This paper proposes an unbuffered switch architecture and makes detailed analysis of the mechanism of buffer in the switch architecture.According to the simulation results,the S-mesh using the unbuffered switch architecture is better in terms of the optimal performance in message latency than some typical NoC architectures,such as 2D-mesh,Fat-tree,Butterfly,Octagon and so on.The synthesis results of design compiler indicate that the unbuffered switch has obvious advantages of achieving cost and operating speed for the chips.
