dns系统 (英文:Domain Name System,DNS)是因特网的一项服务,它作为将域名和IP地址相互映射的一个分布式数据库,能够使人更方便的访问互联网。DNS最早于1983年由保罗·莫卡派乔斯(Paul Mockapetris)发明;原始的技术规范在882号因特网标准草案(RFC 882)中发布。1987年发布的第1034和1035号草案修正了DNS技术规范,并废除了之前的第882和883号草案。 dns系统相当于互联网的路标,其重要性不言而喻。
房企在大数据时代的信息化
今天和某房企的管理层交流,对方对大数据非常感冒,认为是其战略的一份,并准备高薪聘请大数据经理,组建一个大数据的团队,但和交谈中发现几点
1. 需要立即部署大数据吗
目前该房地产企业已经部署erp系统,具有ERP系统的负责人,和其交流,了解到企业数据有限,根本算不上大,可能的数据有销售记录、客户信息、工程项目管理、采购信息、商业地产项目等,数据主要集中ERP系统中,其他互联网的信息主要为;
DDoS attack map
在线动态展示全球DDoS攻击的流量等信息,Google Idea项目之一
Run jekyll on windows
下载安装ruby,Devkit
安装完ruby后,需要安装与ruby对应的DevKit,之后运行:
1 2 3 4 5 6 | ruby dk.rb init ruby dk.rb install gem install jekyll //如果更新失败,可以使用国内淘宝的源 gem sources --remove https://rubygems.org/ gem sources -a http://ruby.taobao.org/ |
提示invalid byte sequence in GBK错误
按照提示安装Jekyll后,在windows下如果文件中有中文或者其他非ascii码字符,会遇到字符集错误
数据分析这点事
从微博段子说起,微博上关于数据分析有两个段子,我经常当作案例讲,第一个段子,说某投资商对某企业所属行业有兴趣,要做背景调查,甲是技术流,一周分析各种网上数据,四处寻找行业材料,天天熬夜,终于写出一份报告;乙是人脉流,和对方高管喝了次酒,请对方核心人员吃了顿饭,所有内幕数据全搞定,问谁的方法是对的;第二个段子,某电商发现竞争对手淘宝店,周收入突然下降了30%,但是隔周后又自然恢复,中间毫无其他异常现象,于是老板让分析师分析,苦逼的分析师辛苦数日,做各种数学模型,总算找到勉强的理由自圆其说,老板读毕,虽说不能让人信服,却也没有更合理的解释,某日,见对手老板,闲聊此事,“你们某段时间怎么突然收入下降?” “嗨,别提了,回家一趟,公司放羊了。”老板恍然大悟。
A Practical Intro to Data Science
A Practical Intro to Data Science
There are plenty of articles and discussions on the web about what data science is, what qualities define a data scientist, how to nurture them, and how you should position yourself to be a competitive applicant. There are far fewer resources out there about the steps to take in order to obtain the skills necessary to practice this elusive discipline. Here we will provide a collection of freely accessible materials and content to jumpstart your understanding of the theory and tools of Data Science.
At Zipfian Academy, we believe that everyone learns at different paces and in different ways. If you prefer a more structured and intentional learning environment, we run a 12 week immersive bootcamp training people to become data scientists through hands-on projects and real-world applications. We also host a free Skillshare course covering much of this material at a high level.
We would love to hear your opinions on what qualities make great data scientists, what a data science curriculum should cover, and what skills are most valuable for data scientists to know. Share your thoughts over at Hacker News!
_While the information contained in these resources is a great guide and reference, the best way to become a data scientist is to make, create, and share!