03-05-2012, 12:42 PM
Computer-aided design
3DSearching .doc (Size: 366.5 KB / Downloads: 43)
INTRODUCTION
From computer-aided design (CAD) drawings of complex engineering parts to digital representations of proteins and complex molecules, an increasing amount of 3D information is making its way onto the Web and into corporate databases.
Because of this, users need ways to store, index, and search this information. Typical Web-searching approaches, such as Google’s, can’t do this. Even for 2D images, they generally search only the textual parts of a file, noted Greg Notess, editor of the online Search Engine Showdown newsletter.
However, researchers at universities such as Purdue and Princeton have begun developing search engines that can mine catalogs of 3D objects, such as airplane parts, by looking for physical, not textual, attributes. Users formulate a query by using a drawing application to sketch what they are looking for or by selecting a similar object from a catalog of images. The search engine then finds the items they want. The company must make it again, wasting valuable time and money.
BASICS OF INTERNET SEARCHING
Internet searching typically involves placing a keyword in the search box and clicking search. The search engines crawls through the websites and rate a webpage according to the occurrence of the keyword in the page. Some of the internet searching techniques is
Search Engines
Here basically we give a keyword to search. The search engine looks in registered webpages for this particular keyword and returns result from most frequent webpages. Examples of such systems are Google, altavista etc.
Google
--Crawler-based & comprehensive (large) database. Ranking of results by popularity helps find good sites when searching broad topics. Offers a variety of advanced and other search options; for example, image search or U.S. government search
Yahoo! Search
- Crawler-based, comprehensive (large) database with a variety of search options. (Yahoo purchased Alta Vista and All the Web in 2003 and in March 2004 these search engines were re-designed to return results similar to Yahoo Search)
MSN Search
-- combines human and crawler created search results. Editors hand-pick sites for popular topics; MSN also searches human-selected results of LookSmart; and when all else fails, uses Inktomi for web crawler results.
Teoma
-- Crawler-based, smaller index than Google, Alta Vista, & AlltheWeb, but smaller can be better for popular topics. Teoma method for ranking is intended to incorporate page authority into popularity ranking. It uses "Subject-Specific Popularity" to rank a site based on the number of same-subject pages that reference it, not just general popularity.
Ask Jeeves
- crawler-based search results using Teoma search engine.
Directories
Directories present us with a set of interested webpages URL. Usually it forms a good search beginning. Examples of such systems include Yahoo directory service, Imac directory etc.
3DSearching .doc (Size: 366.5 KB / Downloads: 43)
INTRODUCTION
From computer-aided design (CAD) drawings of complex engineering parts to digital representations of proteins and complex molecules, an increasing amount of 3D information is making its way onto the Web and into corporate databases.
Because of this, users need ways to store, index, and search this information. Typical Web-searching approaches, such as Google’s, can’t do this. Even for 2D images, they generally search only the textual parts of a file, noted Greg Notess, editor of the online Search Engine Showdown newsletter.
However, researchers at universities such as Purdue and Princeton have begun developing search engines that can mine catalogs of 3D objects, such as airplane parts, by looking for physical, not textual, attributes. Users formulate a query by using a drawing application to sketch what they are looking for or by selecting a similar object from a catalog of images. The search engine then finds the items they want. The company must make it again, wasting valuable time and money.
BASICS OF INTERNET SEARCHING
Internet searching typically involves placing a keyword in the search box and clicking search. The search engines crawls through the websites and rate a webpage according to the occurrence of the keyword in the page. Some of the internet searching techniques is
Search Engines
Here basically we give a keyword to search. The search engine looks in registered webpages for this particular keyword and returns result from most frequent webpages. Examples of such systems are Google, altavista etc.
--Crawler-based & comprehensive (large) database. Ranking of results by popularity helps find good sites when searching broad topics. Offers a variety of advanced and other search options; for example, image search or U.S. government search
Yahoo! Search
- Crawler-based, comprehensive (large) database with a variety of search options. (Yahoo purchased Alta Vista and All the Web in 2003 and in March 2004 these search engines were re-designed to return results similar to Yahoo Search)
MSN Search
-- combines human and crawler created search results. Editors hand-pick sites for popular topics; MSN also searches human-selected results of LookSmart; and when all else fails, uses Inktomi for web crawler results.
Teoma
-- Crawler-based, smaller index than Google, Alta Vista, & AlltheWeb, but smaller can be better for popular topics. Teoma method for ranking is intended to incorporate page authority into popularity ranking. It uses "Subject-Specific Popularity" to rank a site based on the number of same-subject pages that reference it, not just general popularity.
Ask Jeeves
- crawler-based search results using Teoma search engine.
Directories
Directories present us with a set of interested webpages URL. Usually it forms a good search beginning. Examples of such systems include Yahoo directory service, Imac directory etc.