Theoretical papers and applied papers are two different types of academic papers, and they have some obvious differences in purpose, content and writing methods.

First of all, the main purpose of the theoretical thesis is to discuss and explain the theoretical problems in a certain field, and through the analysis and criticism of the existing theories, put forward new viewpoints or revise and improve the existing theories. This kind of paper usually needs in-depth research and understanding of relevant theories, as well as a lot of reading and analysis of relevant literature. Therefore, theoretical papers are usually highly academic and innovative.

In contrast, the main purpose of applied thesis is to solve practical problems and verify its effectiveness and feasibility by applying theoretical knowledge to practical situations. This kind of paper usually needs to have a deep understanding of the practical application background and a good grasp of related technologies and methods. Therefore, applied papers usually have strong practicability and operability.

Secondly, the content of the theoretical paper mainly involves abstract concepts and theoretical framework, and it is necessary to define and explain related concepts and establish a logical theoretical system. This kind of paper usually needs to use logical reasoning and mathematical modeling to analyze and discuss theoretical problems in depth.

The content of applied papers pays more attention to practical operation and technical details, and needs to describe the background and requirements of practical application in detail, as well as the principles and steps of the methods and technologies adopted. This kind of paper usually needs to provide specific cases and data support to prove the effectiveness and feasibility of the proposed solution.

Finally, the writing method of theoretical papers is usually rigorous and standardized, which needs to follow the writing norms and format requirements of academic papers. This kind of paper usually needs a lot of literature review and citation to ensure that the viewpoints and conclusions put forward have academic basis and support.

However, the writing method of applied papers pays more attention to practicality and operability, and needs to be combined with the actual situation and writing. This kind of paper usually needs field research and experimental verification to ensure that the proposed solution can be applied and popularized in practice.