The abbreviation of the English word PrincipleInvestigator is the core leader of academic research. Later, pi system was gradually formed in academic research, which refers to a system with an academic leader as the core, modern science and technology as the activity form and human resources as the means.

professor

Professor is the highest level of university teachers' titles. In Chinese, the word "professor" comes from the meaning of "imparting knowledge to dispel doubts", which is the name of academic officials in ancient China. This position was set up in universities during the Han and Tang Dynasties in China. This word has nothing to do with English. In Japanese, "professor" is used together with Chinese to address teachers in universities.

Professor is a title in the higher education system. Most of them refer to senior teachers and researchers who teach in universities or community colleges, but there is a difference between professors and researchers. Professors have teaching tasks, but researchers don't.

The Principal Investigator (PI) is the holder of an independent research fund managed by a university and the principal investigator of the funded project, usually in the scientific field, such as laboratory research or clinical trials. This phrase is also often used as a synonym for "laboratory director" or "research leader". Although this expression is common in science, it is widely used by people who make the final decision on a research project and supervise the funds and expenditures.