汽车上的ECU即“电子控制单元”(Electronic Control Unit),也就是电子信息技术领域所谈的单片机。多个ECU之间的信息传递就要采用CAN-Bus局域网数据总线控制,CAN全称为“Controller Area Network”,即控制器局域网;汽车网络技术在汽车...汽车上的ECU即“电子控制单元”(Electronic Control Unit),也就是电子信息技术领域所谈的单片机。多个ECU之间的信息传递就要采用CAN-Bus局域网数据总线控制,CAN全称为“Controller Area Network”,即控制器局域网;汽车网络技术在汽车上的应用主要汽车内部和外部两个方面。展开更多
Many coal enterprises have built the videoconference systems on their LAN （Local Area Network）. As the development of these enterprises, their organizations are distributed over our country and even over the world. ...Many coal enterprises have built the videoconference systems on their LAN （Local Area Network）. As the development of these enterprises, their organizations are distributed over our country and even over the world. Therefore, the videoconference systems have to run over WAN （Wide Area Network）. Normally, the structure of a videoconference system is center_division including MCU （multi control unit）and participants. No QoS and security assurance are available now because all videoconference system is based on TCP/IP. Therefore, the system stability is absolutely depended on the Network. This paper discussed how to anti ARP attacking. The method discussed in this paper is based on TCP/IP.展开更多
We start this paper by answering the questions： What requirements should a good Loss Differentiation Mechanism （LD） for 802.11 networks in loT meet？ Do the existing LDs work well in 802.11 networks when moving tow...We start this paper by answering the questions： What requirements should a good Loss Differentiation Mechanism （LD） for 802.11 networks in loT meet？ Do the existing LDs work well in 802.11 networks when moving towards loT？ Then we present the four properties that a LD used in loT should own and the two-folded factors that we should consider when designing such a LD. Thereby, a novel LD is proposed utilizing the back- off frozen event to reveal collision probability. Our mechanism works efficiently with standard 802.11 ; only practical statistics information is needed. In ad- dition, our mechanism can be done solely by the sender without introducing extra signaling overhead. Extensive simulations show that our mechanism can be applicable to different scenarios in 802. 11 WLANs.展开更多
In order to reduce broadcast storms, improve network security, virtual LAN technology has been widely used in LAN planning. But in many networks, it was be required that computers in different VLAN （Virtual Local Are...In order to reduce broadcast storms, improve network security, virtual LAN technology has been widely used in LAN planning. But in many networks, it was be required that computers in different VLAN （Virtual Local Area Network） could be communicated. This article mainly introduced the VLAN classification method inter-VLAN data communication technology, and explained in detail with two simple examples the concrete configure method of the communication between the same cross-switch VLAN traffic and inter-VLAN.展开更多
The variation of the radiation field around accelerator is complex.Only by real-time monitoring can one learn them in detail.The traditional measurement methods have been out of date.The mini-DDL is a specific device ...The variation of the radiation field around accelerator is complex.Only by real-time monitoring can one learn them in detail.The traditional measurement methods have been out of date.The mini-DDL is a specific device designed for such radiation field real-time monitoring.It has huge flash memories and is small in size.It can communicate with the control PC via intranet or RS232 port.So it is suitable to be applied not only in area monitoring but also in temporary monitoring.The radiation field measurements results obtained using the Mini-DDL are introduced in this paper.展开更多
文摘汽车上的ECU即“电子控制单元”(Electronic Control Unit),也就是电子信息技术领域所谈的单片机。多个ECU之间的信息传递就要采用CAN-Bus局域网数据总线控制,CAN全称为“Controller Area Network”,即控制器局域网;汽车网络技术在汽车上的应用主要汽车内部和外部两个方面。
文摘Many coal enterprises have built the videoconference systems on their LAN （Local Area Network）. As the development of these enterprises, their organizations are distributed over our country and even over the world. Therefore, the videoconference systems have to run over WAN （Wide Area Network）. Normally, the structure of a videoconference system is center_division including MCU （multi control unit）and participants. No QoS and security assurance are available now because all videoconference system is based on TCP/IP. Therefore, the system stability is absolutely depended on the Network. This paper discussed how to anti ARP attacking. The method discussed in this paper is based on TCP/IP.
基金supported by the National Basic Research Program of China(No.2011CB302702)the Beijing Nova Program and the National Natural Science Foundation of China(Nos.60803140,60970133,61070187)
文摘We start this paper by answering the questions： What requirements should a good Loss Differentiation Mechanism （LD） for 802.11 networks in loT meet？ Do the existing LDs work well in 802.11 networks when moving towards loT？ Then we present the four properties that a LD used in loT should own and the two-folded factors that we should consider when designing such a LD. Thereby, a novel LD is proposed utilizing the back- off frozen event to reveal collision probability. Our mechanism works efficiently with standard 802.11 ; only practical statistics information is needed. In ad- dition, our mechanism can be done solely by the sender without introducing extra signaling overhead. Extensive simulations show that our mechanism can be applicable to different scenarios in 802. 11 WLANs.
文摘In order to reduce broadcast storms, improve network security, virtual LAN technology has been widely used in LAN planning. But in many networks, it was be required that computers in different VLAN （Virtual Local Area Network） could be communicated. This article mainly introduced the VLAN classification method inter-VLAN data communication technology, and explained in detail with two simple examples the concrete configure method of the communication between the same cross-switch VLAN traffic and inter-VLAN.
文摘The variation of the radiation field around accelerator is complex.Only by real-time monitoring can one learn them in detail.The traditional measurement methods have been out of date.The mini-DDL is a specific device designed for such radiation field real-time monitoring.It has huge flash memories and is small in size.It can communicate with the control PC via intranet or RS232 port.So it is suitable to be applied not only in area monitoring but also in temporary monitoring.The radiation field measurements results obtained using the Mini-DDL are introduced in this paper.
