18 search engines that graduate students should add to favorites

1, http://scholar.google.com/This not much to talk about.
2, http://qns.cc/rising star, good assistant to scientific research personnel, 90% of the website is engaged in scientific research students and teachers. Its dictionary search integrates the best online English-Chinese writing and scientific research dictionaries on the market. It is quite convenient to use this search engine to write English papers. Its literature search integrates the best database at present.
3. http://www.scirus.com scirus is one of the most comprehensive and comprehensive scientific and technical literature search engines on the internet, developed by Elsevier Scientific release community, used for searching journals and patents, the effect is very good! Scirus covers the following disciplines: agriculture and biology, astronomy, biological science, chemistry and chemical engineering, computer science, earth and planetary science, economics, finance and management.
Science, Engineering, energy and technology, environmental science, linguistics, law, life sciences, material science, mathematics, medicine, neuroscience, pharmacology, physics, psychology, social and behavioral science, sociology.
4. http://www.base-search.net/base is a multidisciplinary academic search engine developed by the Library of Bielefeld University in Germany. It provides integrated retrieval services for globally heterogeneous academic resources. It integrates the library catalog and approximately 160 open resources (over 200
Tens of thousands of documents.
5. http://www.vascoda.de/vascoda is a prototype of a cross-discipline portal, which focuses on the aggregation of specific themes and integrates library collections, document databases and additional academic content.
6, http://www.goole.com/compared with Google found that some good stuff that Google can not find. Its interface is simple, powerful, and fast. Yahoo and Netease use its search technology. You can try it.
7. http://www.a9.com Google in the same level of search engine. It was launched by Amazon.com. The web result is based on Google, so it is guaranteed to be at the same level as Google. In addition, Amazon's book search and personalized features are added: it mainly records your search history. It's still beta, but it feels good after the trial. I 'd like to recommend a try.
But the disadvantage is that there is no Chinese content in the book search.
8, http://www.ixquick.com strictly speaking is not a search engine, is connected to the search engine and network user information overpass. The new generation of search engines came into being. ixquick meta-search is currently the most brilliant new star. However, ixquick is still unfamiliar to most domestic users. I will not describe the many unique features of ixquick. I will only describe what we are most concerned about.
To search for the database password. Usage: Enter ixquick first, and use the "ProQuest" database as an example. Enter ProQuest username passw ord History Online and click search to see the results. The first page contains 6th entries. The usern Ame and password of ProQuest are displayed in an eye. Don't worry, check the 4th results "HB Thompson subdatabases online da tabases", that is, http://homework.syosset.k12.ny.us/onlinedbs/hbtdatabases /.
Find this is a password page, select the magazines & journals column, there are EBSCO, electric library e lementary, electric library Elementary, Proquest platinum (in school), proques t platinum (remote) uesrname and password are available for the passwords of many databases. Just try EBSCO, OK, and log on successfully.
9, http://vivisimo.com, CMU works, the content of the search classification, this can effectively make a choice, more characteristic. Can achieve classification search, search speed is also good, such as EBSCO password a few minutes to find a lot of. http://search.epnet.com/
User ID: Mountain password: Ridge.

10, http://www.findarticles.com/a good tool to retrieve free paper. After entering the webpage, we can see that he has three functions: driecloud web Article, which is very helpful to us. You can try to enter the articles you are looking for and there will be a lot of discoveries!

11, http://www.sciseek.com/Sample feeling is not very easy to use, the content is not too much, mainly rely on the user to add the URL, provide information search engine, search function is also relatively poor, enter common keywords, the matching content is often not found.

12, http://www.chmoogle.com Click now or jump to the http://www.emolecules.com, in this search engine can search for more than ten millions
The product information or related suppliers are similar to those provided by chemblink, but the chemical physical and chemical information provided is not detailed by chembli NK, different from this, the search engine provides a chemical structured search (the home page contains a search box for Online Chemical structured drawing ).

13. http://www.ojose.com/ojose (online journal search engine, online journal search engine) is a powerful free scientific search engine through ojose, you can search for, download, or buy nearly 60 database resources. However, the operation is complicated.

14. http://citeseer.ist.psu.edu/a search engine about computer and information science.

15. http://hpsearch.uni-trier.de/expert personal homepage Search Engine

16. http://cnplinker.cnpeak.com/in order to provide readers with a convenient and quick integrated network platform for reading various journals from abroad
Service) Online Database Retrieval System, and officially activated for operation. CN plinker is the "" service. Currently, it mainly provides query and retrieval of the contents and summaries of about 3600 foreign journals, as well as the electronic full-text links and the domestic collection query functions of journals. and always maintain data consistency and up-to-date with foreign publishers. comment: only the foreign language search function is provided, but the full text cannot be obtained. I personally think it is not ideal.

17. At present, http://guoxue.baidu.com/Baidu Chinese learning can provide the retrieval and reading of ancient cultural classics from the pre-Qin Dynasty to the late Qing dynasty. The content involves various departments of the scriptures, history, sub-databases, and datasets.

18. http://infomine.ucr.edu/nfomin is an academic search engine established by University of California, Wake Forest University, National University of California, University of Detroit and other university librarians. It provides online academic resources for university staff, students, and researchers.