以太网

By designing the Ethernet MAC in the form of IP soft soft-core, it can take the full advantage of soft-core on flexibility and technics independence, and improve the reusability of IP core as large as possible.

将以太网MAC层模块设计成IP软核，可以充分发挥软核在灵活性和实现工艺无关性方面的优势，最大限度的提高该IP核的可复用性。

The signal is a square wave with two values, high and low.

答：以太网使用曼彻斯特编码，这就意味着发送的每一位都有两个信号周期。

Even your personal music collection can be stored online in an MP3tunes music locker and played through your Squeezebox. 64 MB high-speed RAM NAND programmable flash 3-axis accelerometer tilt sensor Removable 1250 mAh Li-ion rechargeable battery Bridging capability allows Ethernet devices to connect to the network through Squeezebox Receiver's wireless connection Throughput up to 54Mbps, high speed PCI interface to radio module Automatically detects available networks for quick setup Supports both WPA Personal, WPA2-AES and 64/128-bit WEP encryption Supports all 802.11b and 802.11g access points Dimensions - Approximately Length 6.15 x Width 2 x Height 0.74 156.2x50.8x18.8mm

即便您的个人音乐收藏可以存储在一MP3tunes更衣室在线音乐，并通过您的Squeezebox的发挥。64 MB的高速快闪记忆体NAND型可编程3轴加速度传感器的倾斜可拆卸1250毫安锂离子充电电池的衔接能力允许以太网设备通过Squeezebox的连接到接收机的无线连接吞吐量高达54Mbps的网络，高速的PCI接口，无线模块自动检测快速安装同时支持WPA个人外，WPA2 - AES法可用网络和64/128位WEP加密支持所有802.11b和802.11 g接入点尺寸-大约长6.15 x宽2 x高0.74（156.2x50.8x18.8mm

As Ethernet Passive Optical Network is one of the most effective ways for broadband access, it is important to set up a stable and effective network management system.

以太网无源光网络是宽带接入的最有效方式之一，为其建立一套稳定、有效的EPON网络管理系统显得尤为重要。

Routers used to connect different local area networks, and breakthroughs such as token ring network Ethernet LAN standard, such as topology limitations to build a large network.

路由器用于连接不同的局域网，突破诸如以太网和令牌环网等局域网标准拓扑的局限构建一个更大型的网络。

Combining the Intel 28FJ3A series Flash and Ethernet control chip DM9000A, it applied the Field-Programmable Gate Array and Verilog HDL programming technology to the system, implemented synchronic display and storage of stereograph, and reached 100 Mbps in the network transmission.

该方案应用了现场可编程门阵列以及Verilog HDL编程技术，结合了Intel 28FJ3A系列Flash芯片和DM9000A以太网控制芯片，实现了立体图像的同步显示和储存，网络传输速度可以达到100Mbps，具有低成本、低功耗、高速率等特点。

In Broad Band ,Curcuit signal graphics is achieved by oscillograph ,and packet loss rate , throughput, Latency , back-to-back and so on.;In VoIP, the device can communicate with FXO 3804 of TAIWAN Welltech and DT60 of BEIJING JIAXUN FEIHONG, At that time, Ethereal and PalmTool of PA1688 testing are introduced; In CATV, flatness ,signal graphics of radio frequency are tested by CATV stroboscope.

使用示波器测试数据部分的电路信号波形，使用网络分析仪测试丢包率、吞吐量、时延和背压等以太网指标的测试，并记录最终测试结果；电话部分主要是与台湾伟桥的FXO 3804和北京佳讯飞鸿的E1数字中继网关DT60，实现基于H.323协议的VoIP电话通信，同时介绍使用Ethereal软件和PA1688专用测试工具PalmTool的测试分析情况；电视部分主要是使用CATV频谱仪测试输出射频信号的平坦度、信号波形等分析信号质量，并通过实际电视接收观察输出的射频信号质量。

This paper particular introduces a control device based on Ethernet, and presents the struct of Ethernet control system.

本文首先介绍了工业控制网络的发展状况，以及以太网应用于工业控制的优势与缺点。

If the data needs to be sent only to another LAN on the network or subnetwork, it will act only as a bridge delivering the data based on the Ethernet address.

如果需要数据传送到另一只在局域网或子网，它将作为一个桥梁传递数据仅基于以太网地址。

This paper introduces the design and realization of transformer substation monitoring system with industrial Ethernet interface.

摘 要：本文介绍了具有工业以太网接口的变电站监控系统的设计与实现。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。