1. academic database: academic database is one of the main ways to obtain frontier documents of disciplines. Commonly used academic databases include WebofScience, Scopus, PubMed, etc. These databases contain a large number of academic journals, conference papers, patents and other information, which can be obtained by keyword search or classified browsing.
2. Academic search engine: Academic search engine is a search tool integrating multiple academic databases, which can help users quickly find relevant cutting-edge documents. Commonly used academic search engines are GoogleScholar and Baidu Academic. Relevant literature information can be obtained by inputting key words or author's name.
3. Subscribe to academic journals: Many disciplines have specialized academic journals, and usually publish the latest research results and review articles regularly. By subscribing to these periodicals, you can get the frontier literature information of this subject in time.
4. Academic conferences and seminars: Academic conferences and seminars are important platforms for scholars to exchange research results and share the latest research trends. Attend these conferences and seminars, you can listen to the reports and speeches of experts and scholars, and get the cutting-edge literature information of this discipline.
5. Academic social network: Academic social network is an online social platform where scholars can share their research results, discuss problems and exchange experiences. By joining relevant academic social networks, you can establish contact with other scholars and obtain their research results and recommended documents.