P-NET现场总线技术分析与应用_PLC应用_机电论文_百科全书 关键词：P-NET，现场总线，虚拟令牌 [gap=479]Keywords：P-NET,fieldbus,virtual token
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In this thesis a new parsing technology of Extensible Markup Language which is based on Virtual Token Descriptor is studied.
本论文主要对可扩展标记语言(XML)的新的解析技术——基于虚拟令牌描述符(VTD)解析技术进行了研究。
参考来源 - XML安全快速解析技术研究·2,447,543篇论文数据，部分数据来源于NoteExpress
该协议基于现有的以太网硬件基础，在应用层构造虚拟令牌，利用令牌控制来解决网络的访问冲突问题。
This protocol is based on current hardware foundation of Ethernet and solves access conflict through token-control by creating virtual token on application layer.
该算法无需预先建立虚拟的逻辑令牌传递环路，而是根据网络的拓扑结构，动态地形成令牌的传递路径。
The logic token transfer ring needs not to be established in advance for the TDTA. The path through which the token transfers is dynamically formed according to the network topology.
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