Internet links to almost every part of the world, it contain various kinds of information and huge, how to find the information we possibly need information, like how we look for in the big a small boat, we can use satellite positioning system, or communication system can be, and it needs to be used in the Internet search engine. Search engine is to point to gather information from the Internet, automatic after a certain after finishing, to give users of the system for inquires. Information on the Internet 10000 vast, and hair without order, all the information like the ocean island, a web link is the small island criss-cross bridge between, and search engine, is to draw a picture of you be clear at a glance, for information map you refer to.
Search engine is a very useful tool, every Internet search material of use, because really convenient, do not need you own a a through, it would put you need to find out in front of you.
The source of the search engine very interesting also, it came from the traditional information retrieval theory, in which the full computer program through the scanning each article published in every word, and establish a word for the sort of the document retrieval unit, according to the word in the retrieval procedure in each article the frequency of the occurrence and every retrieval words in an article in the probability of to appear, containing these search term paper to sort the output of sorting results. Early in the Internet search engine is the address of the server resources collected, and the resources provided by the type of different and into different directory, again layer by layer classification. People Lenovo G430 battery want to find the information they want can be classified according to their layers into, you can finally get to its destination, find the information you want. This is actually the most primitive way, only apply to Internet information is not much. As the Internet information according to the geometrical type growth, the emergence of a real sense of search engine, these search engines know web site each page start, after on the Internet search with all the links, the representative super link all words put into a database. This is now the prototype of the search engine. Now the search engine has the simple search web pages of information, they have become more integrated, the beautification. To search engine authority Yahoo. For example, from March 1995 by African American China such as jerry Yang created Yahoo! Start, to now, they from a single search engine development up to now have the electronic commerce, news information service, an umbrella for free E-mail service, etc DuoZhong network service, fully explain the development of search engine from a single to integrated process.
The working principle of search engine can be divided into: # information gathering: search engine information gathering and basic it is automatic. Search engines use called web spiders automatic search robot program to even in a web page on the hyperlink. Robots on the page program chain of links to other pages, as in daily life had said “going, ten preach the…” From a few, like a page start, even to the database and all other web pages on the links. In theory, if the nets page have proper hyperlinks, robot can then traverse most web pages.
Arrange information: search engine of arrange information process known as “establish index”. Search engines should not only save the information collected, and according to certain rules them into line layout. Like a library catalog convenient search index. So, search engines don’t have to keep looking through it all the information can quickly find the material. Imagine if that information is not in any rules piles up at will in the search engine’s data in the library, then it every time looking for material all have to learn the entire database completely looking through again, so to fast computer system is useless.
Accept inquires to search engine users: issue queries, search engine accept inquires to users and information. Search engine every moment from heavy users of a few received the is also issued, it according to the inquires the requirements of each user to check their index, in a very short time the user needs to find the material, and returned to the user. At present, the search engine to return to main is given in the form of web link, through these links, users can be to contain their required data web pages. Usually in these links to search engine will provide a short from these HP dv6000 battery websites information in order to help users judge this page is not to the content, containing such through these simple can speed up the user’s speed of search.
See here, a lot of friends this said, as long as we will use good, don’t need to know that it’s the principle, tell us something about how to use the search engine. Should say, use network friend should use a search engine to find the material, but like for someone of the same, we can find newspaper, can find through the network, can also please professional people and come to find, but always have a best way, can make us the most convenient to find the fastest to that person, the use of the search engine is the same, how we can better use search engine? This is we want to give the key.
Search engine points several types, different ways to work, resulting in the information by the differences of the scope of cover. We usually only focus on a search a search engine is not wise, because it is a good search engines also have limitations, reasonable way should be root according to specific requirements choose different engines.
Our daily information needs can be roughly divided into two kinds, one kind is looking for reference material, and the other is the product or service for Chad, then the corresponding search engine choice should be full text search engines and directories index. Why? Because in the former demand for the target with very body, and directory index entries contain links of limited information, not meet our requirements, so full text search engine will naturally became our choice. Full text search index according to the work principle of qing, it from web pages extract all the information in words, so matching the scope of the search terms is much, also can satisfy even the most ill-advised information needs. That is why now most directory is adopted by the other full text indexing search engines provide level 2 web search reason.
If, on the other hand, we are looking for a product or service, then directory is the dominant index slightly. Because the site in submit directory index are required to provide site title and tracing above, and limit count, so the website owner will use the most concise language summary of your own business scope, let people seem to be clear at a glance. And most full text search engine directly extract nets page title and text as the links of the title and description. Full text search engine used the people have such experience, is the search results show that information are often too cluttered, let a person without method to figure out the web site at a glance of nature. Just us, although we is Google determined advocates, but in the search Dell 640M battery business information or use sohu, sina, often netease directory search. In addition, when you want to collect some sort of the web site, the directory indexed classified catalogue is your natural treasures.
Now, we commonly used several search engines is Google, Yahoo and the most big Chinese search engine baidu, and display the use of sogou songs. When exactly which to use search engine?
Know all kinds of search engines, analysis the characteristics of the needs of after you to determine what kind of search engines should make the most suitable for the search.
How to conduct a efficient search, a few very important skill: skills: learn to use one of two key words.