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实用工具 FluentUDF
fluent 自定义函数中文帮助 内容很全面-fluent English to help content-defined functions very comprehensive
电源技术 简单的电池电路扩展以太网供电(PoE)峰值电流
 
Power over Ethernet (PoE) is a new development thatallows for the delivery of power to Ethernet-based devicesvia standard Ethernet CAT5 cable, precluding the need forwall adapters or other external power sources. The PoEspecification defines a hardware detection protocol wherePower Sourci ...
电源技术 电源转换,测量和脉冲电路
 
This ink marks LTC’s eighth circuit collection publication.1We are continually surprised, to the point of near mystification, by these circuit amalgams seemingly limitlessappeal. Reader requests ascend rapidly upon publication,remaining high for years, even decades. All LTC circuitc ...
单片机编程 基于AVR单片机的闭环控制系统
针对科研实验中对拉压千斤顶加载过程控制的需要，采用ATmega128单片机控制步进电机进而实现对执行系统的电动泵站实行自动控制。对力和位移的数据采集与处理及用步进电机控制电动泵站手柄的技术细节作了重点描述。通过单片机的A/D变换器对AMP放大模块采集的电桥信号作量化处理，千斤顶的操控手柄位置依电动油泵阀门开 ...
单片机编程 基于ROM单片机的汉字输入法的实现
在需要实时大量输入汉字的显示控制处理应用中，利用传统单片机实现显示控制的设计方法是较难实现的。带汉字字库的液晶模块的使用使得小容量ROM单片机的大量汉字信息输入与显示成为可能。提出了针对汉字字库编码的二级索引拼音输入检索方法,介绍了以ST7920作为控制器的带汉字字库的液晶显示模块的接口方法及汉字显示和控制原 ...
单片机编程 PCA954X家庭的I C SMBus多路复用器与开关
The Philips family of Multiplexers and Switches consists of bi-directional translating switches controlled via the I2C or SMBus to fan out an upstream SCL/SDA pair to 2, 4 or 8 downstream channels of SCx/SDx pairs. The Multiplexers allow only one downstream channel to be selected at a time, while th ...
无线通信 S参数的设计与应用
Agilent AN 154 S-Parameter Design Application Note S参数的设计与应用
The need for new high-frequency, solid-state circuitdesign techniques has been recognized both by microwaveengineers and circuit designers. These engineersare being asked to design solid state circuitsthat will operate at higher an ...
其他 PhpDig is a search engine written in PHP that uses a MySQL database backend. It features indexing of
PhpDig is a search engine written in PHP that uses a MySQL database backend. It features indexing of both static and dynamic pages, spidering of almost all links in HTML content, in hrefs, areamaps, and frames, and full text indexing. The search results appearence is skin-able, using a very simple t ...
Java编程 留言本 需要修改的地方都有注释 你可以自行修改 主要有login.jsp和jdbc.java里面关系都数据库连接部分 jdbc你修改编译之后请放到WEB-INFclasseswu目录下面 数据库采用的
留言本 需要修改的地方都有注释 你可以自行修改 主要有login.jsp和jdbc.java里面关系都数据库连接部分 jdbc你修改编译之后请放到WEB-INF\classes\wu目录下面 数据库采用的是mysql 建表语言是： CREATE TABLE liuyan_temp ( id int(6) NOT NULL auto_increment, url varchar(100) default # , ip varchar(20) default NULL, ...
Internet/网络编程 ngrep strives to provide most of GNU grep s common features, applying them to the network layer. ngr
ngrep strives to provide most of GNU grep s common features, applying them to the network layer. ngrep is a pcap-aware tool that will allow you to specify extended regular or hexadecimal expressions to match against data payloads of packets. It currently recognizes TCP, UDP and ICMP across Ethernet, ...