I. SCI (Scientific Citation Index)
It is an important periodical abstract index database in the field of natural science. It was created in 196 1 and compiled by institute for scientific information (ISI).
SCI can be used to retrieve the information of important academic achievements in mathematics, physics, chemistry, astronomy, biology, medicine, agricultural science, computer science, materials science and other disciplines. SCI is also regarded as an important basis for formulating discipline development planning and ranking by academic circles at home and abroad.
Second, EI (engineering index? )
Founded in 1884, EI retrieval, a well-known comprehensive retrieval tool for engineering technology published by engineering information company, has the characteristics of strong comprehensiveness, wide data sources, wide geographical coverage, large amount of reports, high report quality and strong authority.
As the world's leading online information service provider of applied science and engineering, EI has been committed to providing the most professional and practical online data, knowledge and other information services and support for researchers and engineers.
Third, SSCI (Social Science Citation Index)
Social science citation index is an important periodical abstract index database in the field of social science. The data covers social science fields such as history, politics, law, linguistics, philosophy, psychology, library and information science and public health.
Requirements and structure of repetition rate of periodical papers
First, the requirements for the repetition rate of periodical papers
Generally speaking, the repetition rate of papers in first-class journals is 30%, and the repetition rate stipulated in first-class titles will be looser, so it will be relatively easier. The repetition rate of research papers in intermediate journals is generally set at 20%, and there will be more papers with intermediate accounting titles than those with primary technical titles, so the repetition rate of papers will be strictly controlled.
The repetition rate of advanced periodical papers is generally required to be around 10%. We can see that if the repetition rate is low, the stage will be higher.
Second, the basic structure of periodical papers
Cover: The cover of a periodical paper usually includes the title of the paper, author information, periodical information, etc. It is a brief description of the paper, which should summarize the purpose, method, result and conclusion of the paper; Keywords: Keywords are the core concepts of the paper, and the content of the paper should be clearly and concisely expressed.
Introduction: Introduction is the background introduction of the paper, which should explain the research background and significance of the paper and briefly introduce the present situation and progress of the research; Methods: The method part should describe the research methods and steps in detail, including the research object, research design, data collection and analysis methods.
Results: The result part should describe the results and findings of the study and express them with charts, tables and other tools. Discussion: the discussion part should explain and analyze the research results and compare them with other research results; Conclusion: The conclusion part should summarize the results and findings of the study and put forward the significance and limitations of the study.