称为物理层协议的两个底层处理网络电缆上的实际信号传输。
The two bottom layers, called the physical layer protocols, take care of the actual signal transfer over the network cable.
本文提出一种人工神经网络（ANN）方法，确定暖通空调（HVAC）系统对控制信号响应的时间迟延，在研究中选用了四层网络。
This paper presents an artificial neural network(ANN) approach to determine the time delay for a heating, ventilating, and air -conditioning(HVAC)plant to respond to control actions.
当网络接口层从它的上一层收到一个数据包时，它就加上一个前同步信号以及循环冗余校验（CRC）。
When the network interface receives a packet from the layer above, it adds a preamble and CRC.
利用它们对结构损伤信号进行特征提取，并将提取的信号作为神经网络的输入，采用三层BP网络模型对结构物的损伤进行识别。
Use them for structural damage signals characteristic extraction, and signal extraction as neural network input, the introduction of three-tier network model BP damage to structures identification.
电视信号、声音信号和交互信号设备用电缆网络。第7-2部分：混合光纤同轴电缆外部线缆状况监测。媒体访问控制层规范。
Cable networks for television signals, sound signals and interactive services - Part 7-2: Hybrid Fibre Coax Outside Plant Status Monitoring; Media access control (MAC) layer specification.
对于有关财务状况预警信号采用前向三层BP神经网络建立财务预警模式。
About the financial status signals a financial early warning model is established based on forward 3 layer BP neural networks.
然后将构件损伤引起的标准化的损伤信号指标输入概率神经网络，进行损伤构件所在侧面及所在层的判定；
Secondly, the profile and layer of the damaged member is also determined by probabilistic neural network with input of the normalized damage-signal index.
然后将构件损伤引起的标准化的损伤信号指标输入概率神经网络，进行损伤构件所在侧面及所在层的判定；
Secondly, the profile and layer of the damaged member is also determined by probabilistic neural network with input of the normalized damage-signal index.
应用推荐