The following are some important algorithms. I have listed 32 in the original article, but I think many of them are in number theory and are irrelevant to computers, so they are not selected. Some of the following are often used, and some are basically not used. Some are very common, and some are very biased. But it is also a good thing to understand. You are also welcome to leave behind algorithms that make sense to you. (Note: This article is not translated. most of the algorithm descriptions
Mediawiki import database download: http://zh.wikipedia.org/wiki/Wikipedia:%E6%95%B0%E6%8D% AE %E5%BA%93%E4%B8%8B%E8%BD%BDMediaWiki data import Method
Use the php Command that comes with MediaWiki: mwdumper.Manual: Importing XML dumps
This page describes methodsImport XML dumps.
Contents[Hide]
1 How to import?
1.1 Using Special: Import
1.1.1 Changing permissions
1.1.2 Possible Problems
a profit, or whether it is possible to make a profit in the current economic environment. In the current environment, if MahaloThere is no clear profit route, and no one will buy it.Let the community create content?
Most companies choose to create content in the community. The most typical example is Wikipedia. How can you get better content than Wikipedia? How do you encourage people to create content for
today's web networks are based on PHP design, with 39% of Web sites using PHP. Facebook, Wikipedia, and WordPress are all PHP projects. This is because PHP has a lot of flaws, but it's quick to get started. The name PHP comes from the original "home page", which makes it easy for users to add dynamic content such as dates and usernames to static HTML pages. PHP implements a fly-through from designing a Web site to writing a Web application, but with
The 23rd Chapter Rl-tcpnet Address Resolution Protocol ARPThis section for everyone to explain the ARP (address Resolution Protocol, addresses resolution Protocol), through the previous chapters on TCP and UDP learning, you need to have a basic understanding of ARP.(The knowledge points in this chapter are mainly organized from the network)23.1 Important tips for beginners23.2 ARP Basic knowledge reference23.3 ARP Basics points23.4 ARP function23.5 Summary23.1 Important tips for beginnersThrough
function, for human beings, can develop to this mathematical thinking level, is a leap. It can be said that the proposed, directly accelerate the development of modern science and technology and society, whether it is any modern science and technology, and even economics, political science, sociology, etc., have been widely used in functions.
The following section comes from Wikipedia (in this tutorial, a lot of definitions come from
Baidu Encyclopedia everyone will not be unfamiliar, Baidu know the same brother, in particular, do SEO webmaster, Baidu Encyclopedia is no longer familiar enough, Baidu know more and more strict, many domain names have been added to the blacklist, Guo Ye-ye of the "Wuhan Baidu" Network has also been joined, it is really depressing, usually with the link to know the answer, Will not pass. If Baidu knows that the seoer can make full use of the guerrillas or death squads, then Baidu Encyclopedia is
I recently completed some data mining tasks on Wikipedia. It consists of these parts:
Parse Enwiki-pages-articles.xml's Wikipedia dump;
Store categories and pages in MongoDB;
Re-categorize the category names.
I tested the actual task performance of CPython 2.7.3 and PyPy 2b. The libraries I use are:
Redis 2.7.2
Pymongo 2.4.2
Additionally, CPython is supported by the following libraries:
Hiredis
Pymongo c-e
This article mainly introduces detailed information about the Python crawler package BeautifulSoup recursive crawling instance. For more information, see The Python crawler package BeautifulSoup recursive crawling instance.
Summary:
Crawlers primarily aim to crawl the desired content along the network. They are essentially a recursive process. They first need to obtain the content of the webpage, analyze the content of the page, find another URL, and then obtain the page content of the URL, and
:-Used when the client wants to determine and other available methods to retrieve or process a document on the WEB server.8)connect:-Used when the client wants to establish a transparent connection to a remote host, usually to facilitate ssl-encrypted com Munication (HTTPS) through an HTTP proxy.The GET Request MethodThe GET method is the simplest and the most frequently used request method. It is used to access the static resources, such as HTML documents and images. GET request can be used to
Machine learning and artificial Intelligence Learning Resource guidanceToplanguage (https://groups.google.com/group/pongba/)I often recommend some books in the toplanguage discussion group, and often ask the cows inside to gather some relevant information, artificial intelligence, machine learning, natural language processing, knowledge discovery (especially, data mining), information retrieval These are undoubtedly the most interesting branches of CS field (also closely related to each other),
For more information, please refer to: ISBN-wikipedia, here's a brief description of what the ISBN code is:
ISBN (International Standard book NUMBER,ISBN; intended pronunciation is-ben), is the code of international Books or independent publications (in addition to periodical publications). Publishers can clearly identify all non-periodical books through the ISBN. One ISBN only one or a corresponding publication corresponds to it. The new version will
the number of characters in each row in the file again and save it in the ed of the memory RDD.
Then read the number of each character in mapped, add it to 2, and calculate the read + add time consumption.
Only map, no reduce. Test 10 Gb Wiki
The read performance of RDD is tested.
Root @ master:/opt/spark #./run spark. Examples. hdfstest master @ master: 5050 HDFS: // master: 9000:/user/lijiexu/Wikipedia/TXT/enwiki-20110405.txt
For example, the x-axis unit measure length changes to the original 1/2,y axis unit measure length to the original 1/3, that is, with the matrix
By multiplying it into a Cartesian coordinate system I. That is, the transformation is applied to the coordinate system by multiplying it with the transformation matrix. ”1.1 A bunch of basic conceptsAccording to Wikipedia, in the Matrix, t
nodes contain all the instances belonging to the sub-nodes, but this does not have this requirement, and more specifically domain-specific KBS. global KBS: domain-specific KB: dblp, Google Scholar, dblife, echonestglobal kb in specific fields: freebase, Google's knowledge graph, Yago, dbpedia, and the collection of Wikipedia infoboxes. although global KB is important, domain-specific KB is also important in some specific fields. Ontology-like KBS vs.
In fact, Ghost's browser function is based on the Trident engine. In addition to the basic browsing function (SEE), ghost allows users to freely filter a large amount of visualization information.
Pivot allows you to visualize links to websites in favorites (display webpages). You can select the desired conditions on the fil
content in multiple places, so that the content is closer to the user and the chances are higher.
-- Using Google's bigtable, a distributed data storage and databaseShards: different users specify different shards,Use bigtable to back up images to different data centers,CodeCheck who is the most recent
Here is the detailed architecture description of YouTube.
4. Summary of plentyoffish Architecture
I think this is the most amazing thing. A person who spends 2 hours a day can maintain a d
can well process large and active datasets. (Editor's note: Facebook uses Cassandra for email search .) More You have more options as needed. See this list in Wikipedia. Cache data Because data needs to be frequently used, it is more reasonable to store the data in the memory than to be queried in the database each time. This greatly improves the running speed of Web applications. 3. memcached Memcached is a simple but powerful solution for cac
[News] Wikipedia founder Jimbo Wales has set up a profitable company Wikipedia, which will start a brand new search engine that relies on the power of everyone, not simply machine-supported like Google. For more information, see the Times report and Mashable report. There is an unknown translation on csdn, with hundreds of errors. I hope to correct it as soon as possible. Please note that Wales has stated t
-CN '* @ see ================================ ========================================================== ========================================================== = * @ see method for parsing the JSON string returned by Google * @ see in the JSON string returned by Google, the URL of the image is directly added to JSON with the 'url' parameter and returned to us * @ see. Therefore, we can directly parse the 'url' parameter value in the returned JSON string. The following is an example of the fo
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