主流pdf文檔搜索引擎評測對比
PDF全稱Portable Document Format，譯為可移植文檔格式，是一種跨平臺(tái)的電子文件格式。
這一特點(diǎn)使它成為在Internet上進(jìn)行電子文檔發(fā)行和數(shù)字化信息傳播的理想文檔格式。越來
越多的電子圖書、產(chǎn)品說明、公司文告、網(wǎng)絡(luò)資料、電子郵件開始使用PDF格式文件。
今天，我們就針對目前互聯(lián)網(wǎng)上最主流的pdf搜索引擎做一下介紹，讓大家能有選擇性的快速搜索到需要的pdf資料。
1。toodoc
網(wǎng)址：
http://www.toodoc.com大名鼎鼎的toodoc相信很多朋友都知道并且使用過。它是一個(gè)能搜索到PDF,WORD,PPT,EXCEL,TXT等格式的文檔搜索引擎，
toodoc提供了對文檔查詢結(jié)果的下載，在線預(yù)覽，在線提取文本內(nèi)容的功能。
優(yōu)點(diǎn)：數(shù)據(jù)量大，響應(yīng)速度迅速，功能強(qiáng)大。
缺點(diǎn)：在線預(yù)覽功能有時(shí)無法顯示需要刷新頁面。
2。pdfxp
網(wǎng)址：
http://www.pdfxp.compdfxp是一個(gè)專為PDF而生的搜索引擎，對搜索結(jié)果同樣提供了下載，預(yù)覽和提取內(nèi)容的功能。并且顯示出部分摘要，讓您可以
對結(jié)果更加一目了然。
優(yōu)點(diǎn)：界面美觀，搜索結(jié)果條目清晰，標(biāo)簽功能很實(shí)用。
缺點(diǎn)：對中文支持一般。
3。pdf-search
網(wǎng)址：
http://www.pdf-search.orgpdf-search不僅能搜索到pdf,而且還提供doc和ppt格式的查詢結(jié)果。pdf-search對文檔的預(yù)覽有圖片和動(dòng)畫兩種方式。
優(yōu)點(diǎn)：速度快，語言支持效果不錯(cuò)。
缺點(diǎn)：結(jié)果頁列表內(nèi)容較少。
4. alldatasheet
網(wǎng)址：http:
www.alldatasheet.comalldatasheet是一個(gè)能查詢到20億電子元器器件PDF的搜索引擎。這對需要查找電子專業(yè)資料的朋友非常有用。alldatasheet更
提供了直觀的器件資料的封面圖片。
優(yōu)點(diǎn)：數(shù)據(jù)量大
缺點(diǎn)：響應(yīng)速度較慢
Pdf document mainstream comparison search engine evaluation
PDF full Portable Document Format, can be translated into Portable Document Format, is a cross-platform format for electronic documents.
This feature makes it on the Internet for electronic document distribution and dissemination of digital information of the ideal document format. Increasingly
The more e-books, product descriptions, the company statement, the network information, e-mail to start using PDF format.
Today, we present the most mainstream of the Internet search engine do you pdf introduced so that we may be selective to the quick search of the pdf information needs.
1. toodoc
URL:
http://www.toodoc.com The famous toodoc believe many of my friends all know and used. It is a searchable PDF, WORD, PPT, EXCEL, TXT format files, such as search engines,
toodoc provides search results for document downloads, online preview, on-line extraction of text features.
Advantages: large amounts of data, rapid response speed and powerful.
Disadvantages: online preview sometimes need to refresh the page can not be displayed.
2. pdfxp
URL:
http://www.pdfxp.com pdfxp is a PDF and Health for the search engines, search results provided the same download, preview and extract the contents of the function. And part of a summary showing, so that you can
The results more clearly.
Advantages: beautiful interface, the search results entries clear, useful labels.
Disadvantages: support to the Chinese general.
3. pdf-search
URL:
http://www.pdf-search.org pdf-search not only search the pdf, but also provide the doc and ppt format of query results. pdf-search on the document preview image and animation are two ways.
Advantages: fast, good effect of language support.
Disadvantages: The results page lists the contents of less.
4. Alldatasheet
URL: http:
www.alldatasheet.com alldatasheet is a query to two billion yuan device electronic PDF of the search engine. This need for information professionals to find e-friends very useful. alldatasheet more
The device provides visual information on the cover picture.
Advantages: large amounts of data
Disadvantages: slow response
