电子元件的设计需要注意74AC04

语音控制系统电梯语音控制系统

华为 Quidway 系列多协议路由器，支持 PPP、FR、X25、SLIP、HDLC 等网络协议，用户可通过各种广域网线路接入 Internet 及互联互访。 路由器内置安全防火墙、NAT、RADIUS 安全认证，以及 CALL BACK 等多项互联安全防护功能；并通过 CA 认证协议的验证和 IPSec 隧道协议，在 Internet 上构建安全可靠的网络通道，基于硬件的数据加密，将保密数据加密后在隧道上传输，加密数据有可靠的保密性但牺牲了效率；非保密数据可以通过一般性安全处理在隧道上传输，保证较高的转发速率。硬件加密的算法采用专门的芯片（经过国家相关部门批准）进行加密，密钥长度大于 128 位，并提供高强度的一次一密功能。配合完全自主知识产权的软硬件平台，提供网络的安全互联和数据的安全传输的安全解决方案。 而 "备份中心"的可靠性备份解决方案，实现多种线路之间的任意备份和业务分担，为网络提供业界最坚固的保护屏障，保证网络的可靠运行。-Huawei Quidway series of multi-protocol routers to support PPP, FR, X25, SLIP, HDLC and other network protocols, users can through various WAN lines and Internet access to the Internet visits. Built-in security firewall router, NAT, RADIUS authentication, and a number of other CALL BACK Internet security protection functions; And through CA and validation of the agreement IPSec agreement on the Internet to establish a secure and reliable network access, hardware-based data encryption, data encryption confidentiality the tunnels on the Tunnel, a reliable data encryptio

介绍powerdesigner工具的使用-Powerdesigner introduce the use of instrument

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1.编写报告总体框架与报告最终整理 2.取款模块 3.编写测试计划、测试分析报告并写入程序代码 -1. Preparation of the report and the report of the overall framework of the final finishing 2. Teller module 3. Preparation of test plans, test analysis report and write program code

Power Allocationin a Transmit Diversity System with Mean Channel Gain Information

电磁兼容EMC设计的目的就是想办法使自己设计或生产的电子设备产生各种干扰信号的幅度符合别人的要求；同时还要想办法让自己设计或生产的电子设备在受到其它电子设备产生干扰的情况下还能正常工作。因此，EMC标准一般都是强制性的。-Electromagnetic Compatibility EMC design is to seek ways to make their own design or production of a variety of electronic equipment generated interference signal margin requirements in line with the others but also to find ways to help their own design or production of electronic equipment by the other electronic devices interfere with the circumstances can work properly. Therefore, EMC standards are generally mandatory.

如何发现并解决FPGA设计中的时序问题OFFSET约束-How to find and solve the FPGA design OFFSET timing constraint problem

某220KV区域性变电所一次系统设计。主变为2×120MVA，电压比为220/121/10.5KV，容量比为100/100/50，本期工程一次建成，设计中留有扩建的余地。-220KV substation of a regional one system design. Main becomes 2 × 120MVA, voltage ratio 220/121/10.5KV, the capacity ratio of 100/100/50, the current project once completed, the design leaves room for expansion.

利用 OPB 定制外设连接 LCD 和 MicroBlaze 处理器-Custom OPB peripheral connectivity using LCD and MicroBlaze processors