首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
自考
Searching by keyword is the most common method of using a search engine, but the problem with keywords is the relatively impreci
Searching by keyword is the most common method of using a search engine, but the problem with keywords is the relatively impreci
admin
2017-01-30
101
问题
Searching by keyword is the most common method of using a search engine, but the problem with keywords is the relatively imprecise results and the return of a lot of irrelevant information. Keywords may have more than one meaning and search results may be found only by using a synonym of the keyword. The method of browsing on the other hand takes too much to find the relevant information. Directories like Yahoo try to circumvent the problem, but the manual process of classifying material on the web takes up too much time, resulting in very few search results, as not everything on the web can be classified. Therefore new paradigms of searching are needed as well as new software that is able to categorize web sites automatically.
The majority of search engines come from the United States and has specialized in English resources and information reflecting the American culture. People who do not speak English or who are non-native speakers have therefore many disadvantages on the web.
The centralized approach to information retrieval has extreme difficulty in coping with the multilingual and multi-cultural nature of the information society. The Internet has become a success throughout the world, but the American search engines operate with a US-centric company structure and tend to concentrate upon the English language. Although many search engines have subsidiaries in many other countries, like Japan or Italy, the way the information is presented is the American way and may not reflect the logic of the people who are using it.
National search engines in Russia or France, for example, have to deal with far smaller sets of information and specialize in the cultural and linguistic environments that they know best. Their disadvantage is that the queries are in Russian or French and the search results contain only a small subset of possible results on the web, as they are restricted to the language. This strongly reduces the possibility of using the Web as a source for the worldwide diffusion of information.
Larger search engines, such as Altavista are able to perform multilingual searches, which presents search results in multiple languages. This is good, if the searcher knows all the languages, but if, for example, an Indian finds a Japanese web site on the search topic, this may not be helpful.
Text documents that are in special formats(such as Postscript or Star Office Documents)are unreachable for many search engines, as the textual information is embedded into the binary structure of the particular file format. The same applies to scanned documents, Java applets and video/ audio clips. The content of these file formats is hidden from search engines today. Only if the description of the file format is known and included into the search engine is it possible to add the content for certain document types. This is relatively easy, just a matter of work. Infoseek for example, is able to index the content of Word documents. More difficult is the inclusion of content that is hidden in applications, as there is no way to tell where the information may be hidden.
The research and development in information and data retrieval is aimed at improving the effectiveness and efficiency of retrieval. Individual and parallel development for database management systems has left this sector without a centralized vision and coordination between the different types of search engines. Search engines on the Internet are very specific and not able to cope with multiple database formats and file types. In order to make searches complete a search engine needs to search over text, documents, images, sounds and all other media formats. So the database integration will be the single most important objective for the future of intelligent search engines.
Search engines cannot work very efficiently today because ______.
选项
A、there is no coordination between the different types of search engines
B、search engines on the Internet are very specific and not able to cope with multiple database formats and file types
C、search engines need to search over different categories to make searches complete
D、all of the above
答案
D
解析
转载请注明原文地址:https://kaotiyun.com/show/VEPR777K
本试题收录于:
电子商务英语题库经管类分类
0
电子商务英语
经管类
相关试题推荐
__________是集中全力向对手的主要市场阵地发动进攻,即进攻对手的强项而不是弱点。
联系强度是指企业与目标客户之间开展的链接的程度或数量。下列不适合度量联系强度的是()
网站规划对网站建设起到( )和( )的作用。
【T1】CustomerRelationshipManagement(CRM)providesyourcompanywithnewwaysofbetterunderstandingandservingyourcustomer.
Severalregionsintheworldaresubject【C1】______stormswhicharesoseverethatthey【C2】______damageonatremendousscale.Th
【T1】CustomerRelationshipManagement(CRM)providesyourcompanywithnewwaysofbetterunderstandingandservingyourcustomer.
Wemustmake______effortstoimprovethings.
Therearetwowaystocreatecolorsinaphotograph.Onemethod,calledadditive,startswiththreebasiccolorsandaddsthemt
Foraclearerpictureofwhatthestudentknows,mostteachersuseanotherkindofexaminationinadditiontoobjectivetests.T
Foraclearerpictureofwhatthestudentknows,mostteachersuseanotherkindofexaminationinadditiontoobjectivetests.T
随机试题
“您去看看其他同类产品,我们的产品算是最便宜的了。”这种处理顾客异议的策略属于()
Increasingly,overthepasttenyears,people--especiallyyoungpeoplehavebecomeawareoftheneedtochangetheireatingha
采用过氧乙浸泡进行排泄物消毒时,恰当的浸泡时间为
在PowerPoint的幻灯片浏览视图中,用户不能进行的操作是()。
一位伟人曾经说过:“人生所有的履历都应排在勇于负责的精神之后。”在责任的内在力量的驱使下,一种崇高的使命感和归属感油然而生。一个企业管理者说:“如果你能真正钉好一颗纽扣,这应该比你缝制出一件粗制滥造的衣服更有价值。”尽职尽责地对待自己的工作,无论自己的工作
金鱼实际上是一类人工驯养的鲫鱼。大约2000年以前,中国的古人就开始养殖银鲫,作为食物和观赏鱼。随着时间的推移,基因突变和人工选择使银鲫身上出现了橙、红、黄等颜色,改变了其沉闷乏味的形象,也造就了我们今天看到的多姿多彩的金鱼。17世纪的时候,金鱼传到欧洲,
阅读下列材料并回答问题:材料1“圆事发展到现在。应该可以使人痛切觉悟,欲求戡平共党祸乱,挽回目前军事上不利的形势,固然不可不从注重加强军队之有形的装备着手.而更重要的则是由军事力量所由出的政治改革着手。”摘蝙自1948年11月4日《中央日报》,《社论:
设y=y(x)二阶可导,且y’≠0,x=x(y)是y=y(x)的反函数。将x=x(y)所满足的微分方程变换为y=y(x)所满足的微分方程。
求
Inthispartofthetest,youareaskedtogiveashorttalkonabusinesstopic.Youhavetochooseoneofthetopicsfromthe
最新回复
(
0
)