搜索资源列表
23.SQL
- SQL 简史 SQL 的诞生于 IBM 公司在加利福尼亚 San Jose 的试验室中 在七十年代 SQL 由这里 开发出来 最初它们被称为结构化查询语言 Structured Query Language 并常常简称为 sequel 开始时它们是为 IBM 公司的 DB2 系列数据管理系统 RDBMS — — 关系型数据库 管理系统 而开发的 您在今天仍可以买到在不同平台下运行的该系统 事实上 是 SQL 造就了 RDBMS 它是一
sun
- 太阳黑子是人们最早发现也是人们最熟悉的一种太阳表面活动。因为太阳内部磁场发生变化,太阳黑子的数量并不是固定的,它会随着时间的变化而上下波动,每隔一定时间会达到一个最高点,这段时间就被称之为一个太阳黑子周期。太阳黑子的活动呈现周期性变化是由施瓦贝首次发现的。沃尔夫 (R.Wolfer)继而推算出11年的周期规律。实际上,太阳黑子的活动不仅呈11年的周期变化,还有海耳在研究太阳黑子磁场分布时发现的22年周期;格莱斯堡等人发现的80年周期以及蒙德极小期等。由于太阳黑子的活动规律极其复杂,时至今日科学家
01
- nix (officially trademarked as UNIX, sometimes also written as Unix) is a multitasking, multi-user computer operating system originally developed in 1969 by a group of AT&T employees at Bell Labs, including Ken Thompson, Dennis Ritchie, Brian Kernigh
5
- HVDC stands for High Voltage Direct Current and is today a well-proven technology employed for power transmission all over the world. In total about 70,000 MW HVDC transmission capacity is installed in more than 90 projects. HVDC stands for High V
ch87
- Today, there are many definitions of empathy. Most clinical and counseling psychologists, however, agree that true empathy requires three distinct skills: the ability to share the other person’s feelings, the cognitive ability to intuit what another
wuziyouduzhendong
- 汽车五自由度模型,当今很多悬架研究机构和科研单位运用各种软件对汽车悬架进行优化。MATLAB运用也越来越广,在汽车动力学研究当中起着重要作用。当然,汽车振动动力学仿真和分析也大量运用MATLAB/simulink模块。-Five degrees of freedom vehicle model, many of today s research institutions and research institutes in suspension using a variety of softwa
CoffeeScript
- It’s hard to imagine a new web application today that doesn’t make heavy use of Javascr ipt, but if you’re used to something like Ruby, it feels like a significant step down to deal with Javascr ipt, more of a chore than a joy. Enter Coffeescr ip
511c
- Gua 论坛系统是一个轻量级的瘦论坛系统, 访问速度极快, 使用简单. 程序代码简洁严谨, 整个系统程序仅400K大小, 功能强大, 完全免费开源. 可用于建设帮助论坛, 企业产品知识库, 教育, 咨询, 问答等等. 在论坛系统日益复杂臃肿的今天, 也许GuaGua会给用户带来一股清风. 2.2.0版与2.0.0版改进比较: 1. 新增会员注册Email验证功能 2. 新增管理员前台审核会员注册, 即变更其用户组 3. 增加SMTP邮箱设置, 解决无法
College-Managment-System
- College Management System scr ipt is the New and revolutionary web based College management system. Online College management system. It has four modules each for Administartion, Students, Teachers, & Parents. A Complete College Solution.. When you b
Verilog-HDL
- a dvan let go look ing down hello how are you today
News
- 新闻发布系统(News Release System or Content Management System)又叫做内容管理系统,是一个基于新闻和内容管理的全站管理系统,新闻发布系统是基于B/S模式的WEBMIS系统,本系统可以将杂乱无章的信息(包括文字,图片和影音)经过组织,合理有序地呈现在大家面前.当今社会是一个信息化的社会,新闻作为信息的一部分有着信息量大,类别繁多,形式多样的特点,新闻发布系统的概念就此提出.新闻发布系统的提出使电视不再是唯一的新闻媒体,从此以后网络也充当了一个重要的新
refullpaperoncontrolofwindturbine
- Various types of induction generators such as the squirrel cage induction generator (SCIG) wound rotor induction generator (WRIG) and doubly fed induction generator (DFIG) are being used today by the various wind turbine manufacturers. However, from
HDD
- Mobile devices available today are very heterogeneous with regard to their display and input capabilities and used software platform configurations. This leads to a complex development process for applications which have to target a wide range of dev
TodayPlugin
- Today plugin for Windows Mobile 2003. Today plugin with link to executable program.
attachments_3
- pic8051We live in a world where everything can be controlled and operated automatically, but there are still a few important sectors in our country where automation has not been adopted or not been put to a full-fledged use, perhaps because of
20111225
- 安装步骤: 1、安装MS SQL SERVER后还原database为kygl 2、添加用户kygl,并且该用户具有数据库kygl的访问权限; 3、安装setup.exe,在IIS中设置虚拟目录或者站点指向该安装目录; 4、打开IE,在http://localhost/kygl进行数据库的配置和基础信息的设置 科研信息管理系统是基金机构,大学,研究机构,企业之间点对点的解决方案, 支持项目申请、项目管理和成果发布的整个流程。 -The developm
GridView
- 大家好,前一段时间我开发了一些基于VS2005下的控件,不知道对大家是否在学习VS2005方面有帮助,今天继续发布基于VS2005下的控件,这个控件主要是针对财务金额显示方面的,最近在做个项目,得用到财务的金额显示,即带有财务表览的显示方法。在网上看看了,发现没有用.net开发的,有用PB,VB等开发的,所以昨天抽出时间写了个这方面的控件。首先大家要知道,在DataGridView中显示财务表览方式的金额,一定要重写去写DataGridViewCell,与DataGridViewColumn 两
chaoshishouyinshitongsheji
- 随着现代科学技术的迅猛发展,计算机技术已渗透到各个领域,成为各行业必不可少的工具。在当今激烈的市场竞争中,让顾客享受既实惠又快捷的购物服务是商战中制胜的一大要素。改革开放的今天,各种大型超市林立,超市已成为消费者日常活动的主要场所。而超市商品也非常之多,建立一套方便快捷的超市收费系统是企业必然要解决的一个问题。系统采用的编程工具是Delphi 7.0版本与Access作为数据库。-With the rapid development of modern science and technolog
Bruce-Lawson--Remy-Sharp---Introducing-HTML5---20
- Written by developers who have been using the new language for the past year in their work, this book shows you how to start adapting the language now to realize its benefits on today’s browsers. Rather than being just an academic investigation, it c
ftp
- 这是一个ftp客户端的程序,实现上传下载功能- There are so many things that can make you happy.Don t focus too much on things that make you sad. Don t let yesterdays failures ruin the beauty of today. Because each day has its own promises.