( 1) EI:
1, Engineering Index (EI) was founded in 1884, which is a famous comprehensive retrieval tool for engineering technology published by engineering information companies. EI retrieval is published every month 1 issue, 13000 to 14000 abstract; Each issue is accompanied by a subject index and an author index; There is also an annual volume and an annual index every year, and the annual index also increases the author unit index. The collected literature covers almost all fields of engineering technology. For example: electric power, electrician, electronics, automatic control, mining and metallurgy, metal technology, machinery manufacturing, management, civil engineering, water conservancy, educational engineering, etc. EI retrieval has the characteristics of strong comprehensiveness, wide data sources, wide geographical coverage, large amount of reports, high quality of reports and strong authority.
2. Subject scope:
(1), with a high academic level of engineering papers, including disciplines:
-Mechanical engineering, electromechanical engineering, ship engineering, manufacturing technology, etc. ;
-Mining, metallurgy, materials engineering, metal materials, nonferrous metals, ceramics, plastics and polymer engineering.
Civil engineering, architectural engineering, structural engineering, marine engineering, water conservancy engineering, surveying and mapping engineering, earth science, etc. ;
Electrical engineering, power plant, electronic engineering, communication, automatic control, computer, computing technology, software, aerospace technology, etc. ;
-Chemical engineering, petrochemical industry, combustion technology, biotechnology, light industry, textile and food industry;
-Project management.
(2) Projects supported by the National Natural Science Foundation, key scientific and technological projects and "863" high-tech projects.
(3) The paper has reached the international advanced level and the results are innovative.
EI does not include papers on pure basic theory.
2. Literary types
(1) print type. Including a, monthly report of engineering indicators; B, engineering index yearbook; C. cumulative index of engineering index.
(2) miniaturization
(3) Machine readable type
(4) Network type
4. Search method:
(1) topic method;
(2) the author's way;
(2) CA:
1, American Chemical Abstracts, 1907 was first published and edited by China Academy of Sciences. CA is a well-known retrieval tool with the widest range of disciplines, the most complete types of documents, the largest number of retrieval channels and the largest amount in the world. It reports 16000 kinds of scientific journals, scientific reports, conference papers, dissertations, data compilations, technical reports, new books and audio-visual materials published in 56 languages in more than 50 countries in the world, and also reports the patent documents of 30 countries and 2 international organizations. The collected literature accounts for 98% of the world's total chemical and chemical literature, with a literature volume of 500,000/year.
2. Subject scope: CA report covers almost all areas of interest to chemists, including inorganic chemistry, organic chemistry, analytical chemistry, physical chemistry and polymer chemistry, as well as metallurgy, geochemistry, pharmacy, toxicology, environmental chemistry, biology and physics.
3. Literature type: (1) printing type; (2) optical disc type; (3) the online version.
4. Search method: (1) keyword index; (2) author index; (3) patent index;
(4) index of chemical substances.
(3) WPI: derwent Publishing Company, founded in 1948, is the largest private institution engaged in patent literature publishing in the world, including various patent retrieval tools published by various countries, such as patent catalogues, abstracts, cumulative indexes, etc.
1. Subject scope: patent documents of all disciplines in major industries around the world.
2. Literature type: patent.
3. Search approach: search the first-level catalogue according to the technical subject, and then search one by one according to the catalogue.