本文简要介绍了 RTP/RTCP协议和 IP Multicast技术 ,结合分布式多媒体交互系统中音频、视频在网络上的多点实时传输的实现 ,详细地介绍了 RTP/RTCP协议在音频和视频数据流传输及传输控制中的实现过程 ,以及利用 IP Multicast技术实现多...本文简要介绍了 RTP/RTCP协议和 IP Multicast技术 ,结合分布式多媒体交互系统中音频、视频在网络上的多点实时传输的实现 ,详细地介绍了 RTP/RTCP协议在音频和视频数据流传输及传输控制中的实现过程 ,以及利用 IP Multicast技术实现多媒体多点传输过程中多用户之间的信息管理。展开更多
Discrete manufacturing workshops are confronted with problems of processing diverse products and strict real time requirements for data service calculation and manufacturing equipment,which makes it difficult to provi...Discrete manufacturing workshops are confronted with problems of processing diverse products and strict real time requirements for data service calculation and manufacturing equipment,which makes it difficult to provide real time feedback and compensation.In this study,a high-availability,high-performance,and high-concurrency digital twin reference model was constructed to satisfy a large number of manufacturing requirements.A multiterminal real-time interaction model and information aging classification rules for virtual and physical models were established.Moreover,a multiterminal virtual interaction model was proposed,and a generalized distributed computing service digital twinning system was developed.This digital twin system was considered a machine tool box processing line as an actual case.Consequently,a full closed-loop manufacturing process digital twin platform for physical request service,real-time response,and quality information feedback from iterations,which provides case guidance for subsequent factory digital twin systems,was realized.The proposed system can satisfy the requirements of multidevice big data computing services in modern manufacturing plants,as well as multiplatform,low-latency,and high-fidelity information visualization requirements for managers.Thus,this system is expected to play an important role in information factories.展开更多
文摘本文简要介绍了 RTP/RTCP协议和 IP Multicast技术 ,结合分布式多媒体交互系统中音频、视频在网络上的多点实时传输的实现 ,详细地介绍了 RTP/RTCP协议在音频和视频数据流传输及传输控制中的实现过程 ,以及利用 IP Multicast技术实现多媒体多点传输过程中多用户之间的信息管理。
基金Project(51975019)supported by the National Natural Science Foundation of ChinaProject(2019 ZX 04024001)supported by the National Science and Technology Major Project of ChinaProject(Z 201100006720008)supported by the Beijing Science and Technology Plan,China。
文摘Discrete manufacturing workshops are confronted with problems of processing diverse products and strict real time requirements for data service calculation and manufacturing equipment,which makes it difficult to provide real time feedback and compensation.In this study,a high-availability,high-performance,and high-concurrency digital twin reference model was constructed to satisfy a large number of manufacturing requirements.A multiterminal real-time interaction model and information aging classification rules for virtual and physical models were established.Moreover,a multiterminal virtual interaction model was proposed,and a generalized distributed computing service digital twinning system was developed.This digital twin system was considered a machine tool box processing line as an actual case.Consequently,a full closed-loop manufacturing process digital twin platform for physical request service,real-time response,and quality information feedback from iterations,which provides case guidance for subsequent factory digital twin systems,was realized.The proposed system can satisfy the requirements of multidevice big data computing services in modern manufacturing plants,as well as multiplatform,low-latency,and high-fidelity information visualization requirements for managers.Thus,this system is expected to play an important role in information factories.
