First, look for articles and documents and search for papers.
1. Advantages of the platform: rich in categories and wide in volume, covering tens of millions of articles in various periodicals such as art and entertainment, automobiles, commerce and finance, computers and technology, health and fitness, news and society, science, education and sports.
2. Platform evaluation: the retrieval operation is simple, and the literature quality may be lacking. However, it has a total of 65,438+065,438+00,000 articles, which come from magazines, periodical publications and newspapers. It is a search website suitable for Google.
Second, titanium academic literature platform
Advantages of 1. platform: it has an ultra-wide collection perspective and a super-strong NPL algorithm. At present, it has collected more than 240 million documents, and it is a one-stop document retrieval website with strong strength in China.
2. Platform evaluation: There are many practical functions, including but not limited to rich retrieval methods, efficient document retrieval functions, detailed document details pages, analysis and topic selection, etc. , dedicated to saving time for students to analyze the value through content after downloading.
Thirdly, semantic scholars' academic search engine.
Advantages of 1. Platform: It was founded by paul allen, the co-founder of Microsoft, and the retrieval results came from journals, academic conference materials or documents of academic institutions. This search engine can retrieve 80% of free papers and documents, with about 3 million copies.
2. Platform evaluation: It can also provide chart preview like the academic function of titanium, which is convenient for researchers to save more screening work. In addition, information screening technology can search the conference name and publication time of papers and screen out keywords and phrases from papers.
Fourth, the base search German bielefeld academic search engine.
Advantages of 1. Platform: The multidisciplinary academic search engine developed by the Library of Bielefeld University in Germany provides integrated search services for heterogeneous academic resources around the world. Open resources are about 160, that is, more than 2 million documents and data information integrated by the base.
2. Platform evaluation: the platform surface is simplified, the literature search is faster, and the theme material is the main material.