The purpose of the research is to describe the main goal or overall goal of the research project, which is the most important part of the research and can clearly let readers know the content of the research, usually a small chapter or title in the introduction of the paper.

The purpose of the study should state the main goal of the study in a general way, which can be a sentence or a short paragraph. The contents to be included are: why, what to do, how to do it, the necessity of research (research background), the content to be completed (actual goal) and how to complete the content (summary of purpose).

Research goal: If the purpose of the research is to clarify the question that needs to be answered, then the research goal is to explain in detail how to answer this question, and divide the research goal into smaller parts, and each part represents the focus of the research project.

So almost all the research objectives are in the form of numbered lists, which are independent chapters in the paper. The following are examples of research objectives:

For different cup types, the relationship between interference size and deformation between cup and cavity is determined.

There are differences between quantitative research and qualitative research in the expression of research objectives, so we can judge whether it is quantitative or qualitative from the research objectives. )

It should be noted that authors sometimes use research questions instead of research objectives, or both. But in fact, both of them are talking about the same problem, but the form is slightly different. Therefore, the research goal can change the word order and expression, thus becoming a research problem. The research objectives should be composed of the following three parts:

Why is this research necessary? What is this research about? what are you going to do？ The simplest way to write it is to answer each corresponding question. The first question is about "why", which provides the background for the research project; The second question "What" describes the purpose of the study; The last question, "How", is an introduction to the next research goal.

And each research goal can follow the SMART principle:

Concrete-Is the action to be taken vague or focused and clearly defined?

Measurable-how to measure progress and determine when to take action?

Achievable (Achievable? )–Do you have the support, resources and facilities needed to carry out the action?

Relevent–Whether the action is essential to achieve the research goal.

Whether the time-limited action can be completed together with other research tasks within the planned time.