1, the first author is the signature of the paper, and the second and third authors are the second and third authors. Generally speaking, it depends on the weight of your article. If the weight is enough, you can publish multiple authors. An article in a foreign multi-center clinical trial can reach 100 people.
2. An article generally has a correspondent, and the correspondent refers to the owner and director of the article. Someone else has a correspondent, which means contact.
3. The ranking can also be determined by both parties through consultation. If there is no agreement, generally the first author ranks first, the second author ranks second, and so on.
Signature right:
The first author is his tutor, which is not only unconventional, but also reasonable. Because the situation is often that the research topic is the tutor's, and the paper is completed under the guidance of the tutor. At this time, whether from the moral point of view or from the perspective of rights, it is beyond reproach that the tutor's signature comes first.
Because the key idea (which is the most important thing in scientific research, and is customarily called "idea") comes from the tutor, students put in and contribute ordinary work, knowledge, energy and time. We can say that even in other cases, the background of tutor status and school administrative power is not the decisive factor.
Refer to the above? Baidu Encyclopedia-First Author