评测9238论搜索引擎的评测方法

9238论搜索引擎的评测方法

Since then, the unique search engine technology has emerged oneafter another, and now it is obviously in the Warring Statesperiod. However, people' s evaluation methods have not changedmuch. Now, the common evaluation is simply to compare the searchspeed, the number of search results and the accuracy of theirsearch by using a few keywords.

Far not said that in the first quarter of 2001 after the upgradeof the askjeeves, you can play like as a phone in any phone inthe hands of askjeeves phone number, can also be labeled on thepage to enter the online about online speech, using yourcomputer' s microphone and speakers to communicate. Then youjust orally to it a request, it will put your voice into text,and then analyze your request to 7 million standard answers,it and other 2 million multimedia repository and Internet tofind the answer, find and then converted into voice to answeryou.

Imagine, if you ask, "the recent American election is up in theair. What do Americans think?"" After a while, the computer ortelephone to answer you: "according to the latest survey, thelast is if Bush is elected, 80% of Americans will accept himas the legitimate president, if Gore is finally elected, 79%of Americans will accept him as the legitimate president. " Ifyou ask, "who scored in the last World Cup finals?" "It answersyour name and also brings up the audio and video clips of thefinal goal. (of course, the audio and video clips are based onthe fact that you're not using the phone, but the computer) .Although, askjeeves think their speech and search speed has to

be the degree of commercialization, but it will still have manyimmature, if you take a few keywords to test its search speedand precision and recall, and many of the common search engine,it came in where? If it' s in the back, isn' t it a lousy searchengine?

One is evaluatingthe Internet searchengine is averydifficultthing, but a lot of evaluation results are ordinary Internetusers to see, is bound to take the Yahoo, include Sina portal,for them, is just a part of the Internet search, other kindsof search how to do? If you don't count, but the net civilianmuch; if it is, is a mess, where to?

Here, let' s analyze some of the capabilities of severalimportant evaluation elements:

I. recall

Since it is a search engine, first of all, than the search scopeis a matter of course, if this fails, the latter does not seemto participate in the evaluation. Because the number ofincluded pages each search engine announced, can the wholeletter, with a keyword search results is obviously, so thegeneral evaluation on this subject.

But to this date there are still many problems, most decentpoint of the search engine I can find a number of keywords toprove its search results is the most complete. Because althoughthe number of pages indexed in size, but the robot and spiderprogram, index scope and index standards are not the same, thebiggest search engine to be much smaller in the search engine

to search.

So what' s the search result for? This kind of search engine isuseful only when searching for rare things, but to check outrare things, you should go to meta search engines. Why use it?The standard of precision is difficult to determine. It dependson what you check. You have to check a particular website andfind a similar web site. The key to precision is to search whatand what keyword to choose, the judge can decide at random, andthen affect the reliability of the evaluation result.Four: dead link

General search engines always have some search results that aremissing, less than one percent, two, or eight or nine, and thisis often used as one of the criteria for evaluation. But asGoogle uses a web snapshot feature, there are few dead linkproblems, and you can still see Google' s own web pages even ifthe site in the search results is closed. How do you calculatethis kind of dead link?

Five: user burden

Have not seen the domestic search engine evaluation, who usedthis one, but it is to evaluate the advantages and disadvantagesof search engines, including many aspects. Search engines arefor human use. They must be comfortable, convenient and fast.Any user who hinders and delays the user' s access to the finalsearch results is considered a user' s burden.

The first is the search interface, a pure search engine

interface that has a search box. Compared to a portal with adsand a large amount of web content, the search burden they bringto the user is high.

The second is to describe the search results, search resultspage description of the text is long or short, "the textdescription index with keyword part or the beginning of indexedpages indexed pages or a few lines of the main content, keywordsare highlighted by what color is not displayed page address,and the searchresults page layout, the the user' s searchburdenthere is a big difference.

Effect of addition is the user steps, whether can use the mouseto start the search, the search results page shows the numberis only 10, page convenient or not, the search box is two ora, above or below, a search keyword search is still displaycable box, every one of thesewill affect the search efficiency.Six: there are other

Do you want to search in this directory?,

Internet Index database update time,

Stability of search engines,

The support ability and strength of advanced search should alsobe evaluated.

A person is not thoughtful, and there may be other importantevaluation factors I did not mention, if you think of, hope to

inform. See here, everyone on the limitations of the currentevaluation methods commonly used search engine must understand,of course, the most ridiculous is that I do not know is ignorantor tricky or special selection criteria, some Chinese searchengine evaluation this year to do not even include Google, aswell as a long list of celebrities can row the violin missedPaganini.

It' s really hard to evaluate search engines.