The protocol stack of wireless sensor networks is composed of physical level, logical link control level, network level, transport level and application levels.
无线传感器网络协议栈由物理、数据链路、网络、传输和应用五层组成。
Procurement is the crucial link of project cost optimization. The successful purchasing behavior that not only comes from in buying side more relies on the procurement control of high level.
采购是工程项目成本优化的关键环节，成功的采购不仅来自于采购方的采购行为，更依赖于高水平的采购管理。
We designed and implemented a simplified link-level protocol with elastic buffered flow-control and buffered wormhole routing switching, it can support to transmit variable-length packet.
提出了一种采用伸缩缓冲流量控制方法、缓冲虫洞路由交换机制、支持可变长度数据包传输的链路控制协议。
The enterprise current account internal control, is the internal controls at the business level, is an important link of enterprise internal control.
企业往来账款的内部控制，是业务层面的内部控制，是企业内部控制的一个重要环节。
Therefore, the detection of oil-water interface is the important link to realize the auto-control of water level in oil tank.
因此，油水界面检测是实现储油罐水位自动控制的重要环节。
Therefore, the detection of oil-water interface is the important link to realize the auto-control of water level in oil tank.
因此，油水界面检测是实现储油罐水位自动控制的重要环节。
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