以太网

At present,all the management and investigatioin inside or outside in cutover technology of Ethernet is based on online network and it neither has visual graph network mangement platform nor arranges the network information as the geographical and customer information also the fault monitor.

国内外以太网接入技术的管理都是对在线网络设备为基础进行的管理研究，并且没有可视化的图形网络管理平台，也没有对网络信息进行地理信息、用户信息、故障监测等综合管理的应用研究。

this paper discusses the general idea,principle,defectiveness of arp protocol in the first place.then this paper discusses the familiar forms of arp cheating and how to guard against it.

该文所讨论的是现行以太网络环境中arp协议的概述与工作原理，arp协议本身的缺陷，以及常见arp欺骗攻击的形式与防范方法。

Then, in order to trade off between the cost and performance of super-fine phase when realizing the low-jitter low-power high-performance frequency synthesizer for Ethernet application, a novel dynamic voltage-mode phase interpolator with 8-stage differential ring VCO has been provided satisfying the requirement of transmitter and receiver simultaneously. The chip has been implemented in SMIC 0.18-um standard CMOS process and achieved an RMS jitter of 11ps with the crystal oscillator reference RMS jitter of 16ps.

接着，在实现以太网低抖动低功耗高性能的频率综合器设计中，为了有效解决超精细相位性能与成本的矛盾，提出一种新颖的动态电压模相位内插电路，与8级环振VCO相配合，为系统同时满足发送与接收需求起到至关重要的作用。

The system achieves a sampling rate of 800Msps, and converts the high speed LVDS signals to low speed LVTTL signals using FPGA. And the FPGA implements the amplitude discrimination and obtains time information. Then FPGA sends the data to the TELL1 readout board.

该系统最高可达800M的采样率，通过FPGA进行电路控制，实现数据的串并转换、数据缓存、幅度甄别与时间信息的获取等功能，最后数据通过TELL1接口电路连接至以太网，用计算机进行读取与分析。

At that time, this paper expounds that APON dissatisfy demand of network Broad Band for people resulting in appearance of EPON that Ethenet and PON combine,and describes principle,topology setting as well as key technology of EPON.

同时本文阐述了APON不能满足人们对网络带宽的需求，并以此引出了把以太网和PON相结合的EPON的产生，详细叙述了WaveEPON的工作原理，拓扑设置以及目前EPON实现的关键技术。

The distributed control system is implemented on the base of industrial Ethernet, which transfers data, audio and video signals simultaneously. Its outstanding features, including distributivity, real-time, reliability, openness and interoperability, are described herein.

所采用的基于工业以太网的集成式全分布控制系统，具有高度的分散性、实时性、可靠性、开放性和互操作性的特点，同时也是数据、语音和视频"三网合一"的系统。

Then, the function model of DNC communication technology-in-based on Ethernet is fabricated.

建立了基于以太网的DNC通信的功能模型。

In this paper,an Ethernet based double-precision floating-point matrix multiplication parallel computing system was designed.The design was implemented on Xilinx's XUP Virtex-II Pro development system.

本文设计了一个基于以太网的双精度浮点矩阵乘法并行计算系统，并在Xilinx XUP Virtex-II Pro开发平台上进行了原型验证。

The control system, which will be installed by system integrator Optimation Technology, Inc., a Siemens Solution Partner, includes redundant dual screen operator stations communicating over Industrial Ethernet to the control processor.

该控制系统将由西门子解决方案合作伙伴、一家叫Optimation 技术公司的系统集成商安装，该系统包括冗余双重屏幕操作站，通过工业以太网相连至控制处理器。

The design and realization of an eddy current testing system based on Ethernet were described.

介绍了基于以太网的涡流测试系统的构成及实现。

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。