SCI (science real hindex) is a world-famous periodical literature retrieval tool published by institute for scientific information, USA. It includes quantity, cause, chemistry, agriculture, forestry, medicine, life science, astronomy, geography, environment, materials and engineering technology. Core journals of natural science.

The engineering index (EI) is published in 1884. It is a famous comprehensive retrieval tool for engineering technology published by EIC. EI is published every month 1 issue. 65438+3000 to 65438+4000 articles, abstracts and abstracts; Every question of subject index and author index; Annual and annual indices have also been published.

The literature covers almost all engineering and technical fields. For example: electric power, electrician, electronics, automatic control, mining and metallurgy, metal technology, machinery manufacturing, civil engineering, water conservancy and so on. It has the characteristics of strong comprehensiveness, wide data sources, wide coverage, high reporting quality and strong authority.