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书籍 Body area communications channel modeling
The past decades have witnessed wide demand and applications for wireless commu-
nications in the human body area, that is, in the immediate environment around a
human body. These demands and applications especially focus on wireless transmis-
sion and networking of personal information for user ide ...
书籍 Ambient Networks
One traditional view of how wireless networks evolve is of a continuous, inevitable progres-
sion to higher link speeds, combined with greater mobility over wider areas. This standpoint
certainly captures the development from first and second generation cellular systems focused
on voice support, and ...
书籍 WIRELESS+AD-HOC+NETWORKS
A wireless ad-hoc network is a wireless network deployed without any infrastructure. In
such a network, there is no access point or wireless router to forward messages among the
computing devices. Instead, these devices depend on the ad-hoc mode of their wireless net‐
work interface cards to commun ...
技术资料 PLC在以太网中与上位机通信的实现
0引言当今国际上有影响的现场总线标准很多，众多的现场总线标准给控制系统的集成带来不便，使得各厂商生产的现场总线产品难以集成在一起，实现互可操作。在现场总线难以统一的情况下，以太网在工业自动化和过程控制领域获得了迅速增长。当前，不少厂商都为其生产的PLC及其远程1/0提供与以太网相连的接口和功能，提供把PLC和 ...