DOI (Digital Object Identifier) is the abbreviation of Digital Object Identifier. It is a unique identification symbol composed of numbers and letters, which is used to identify electronic documents, academic resources and other digital materials. DOI is widely used in academic publications. It is a digital and networked intellectual property protection method, which can provide long-term, stable and reliable storage and reference methods for academic publications. It is an important element widely used in today's academic circles.

The function of DOI is mainly to provide unique and stable identifiers for academic publications, so that these publications can be accurately and reliably identified, stored, retrieved and cited. DOI can help readers and researchers quickly find relevant information about academic publications and obtain detailed information about the publications, author information, citation information and so on. , but also to achieve the links and exchanges between different academic journals.

To make use of DOI, we must first find this number through the Internet, and then through various search engines or academic databases, we can find information, papers, data and other related contents related to this publication. In addition, as long as you know the DOI number, you can also connect it with the DOI numbers or websites of other publications, so as to provide readers with a better way to find and quote academic resources and improve the efficiency of academic research. Therefore, the DOI number of academic publications is becoming the standard of academic publishing industry, which plays an important role in academic research and academic exchange.