Choosing a topic is to determine the direction, scope, object or main problem to be studied. Correct and appropriate topic selection is of great significance to writing graduation thesis. The topic is not what the students want. It is closely related to the development of education itself and a certain social, political, economic and cultural background, so it is restricted by all aspects. Some principles must be followed in choosing a topic, otherwise it is meaningless.

First, the topic type of graduation thesis

Although the classification of topics is not clearly defined, it can be seen from all angles. See table 1 for various definitions of topic types. This is helpful for academic papers to have a clear category representation at the beginning of topic selection, which is of great significance for researchers to accurately grasp the direction of topic selection.

Although the branches of science are becoming more and more specialized and cross-cutting, the division of science into social science and natural science has not changed according to the obvious differences in research objects, tasks, methods and characteristics. From the research purpose, there is no absolute boundary between theoretical research and applied research. Some topics have dual characteristics, that is, comprehensive topics, and exploratory research, as the last link of transforming scientific theories into real productive forces through applied research, can directly promote the development of productive forces, and is a topic type that should be vigorously advocated at present and in the future. Each subject has important and difficult topics in different periods and stages. Research projects that can make a major breakthrough in theory or have important significance in guiding practice are always regarded as key topics, but general topics are also meaningful and promoting, which is an indispensable accumulation process. Directional topics are generally drawn up by relevant institutions or superior organizations, and the practical problems encountered in the research can be divided into several small topics, while fixed topics can be selected with reference to the directional topics, so as to make the directional topics concrete. Due to various factors and conditions, the binding topic selection is not completely free. Individuals need to focus on the overall situation, obey the overall arrangement, and strengthen cooperation and cooperation. The topics with low degree of control have strong autonomy and can be chosen at will according to personal interests and wishes. In addition, topics can be divided from the perspectives of research depth, thinking process and research time limit.

Second, the graduation thesis topic selection method

There are many ways to choose a topic. You should read widely, be diligent in thinking, inspire and find the topic. Combining with the successful cases in scientific research, this paper finds an effective way to select the topic from five aspects: the needs of production practice, literature review and evaluation, the extension of existing achievements, the infiltration among disciplines, and the tracking of frontier hotspots.

(A) the needs of production practice

The problems raised by human beings in practice are always the primary topics of understanding and science. Many extremely important inventions originated from research topics sprouted in practice. Problems that need to be solved in practice in social development, people's life and science and technology, such as environmental problems, population problems, legal system construction problems, migrant workers problems, etc. , has been collected in most provinces, cities, districts and counties. As long as you pay attention to observation, you will find the most scientific and practical topic. The major theoretical and technical research problems of natural science that are related to the national economy and people's livelihood and need to be solved urgently are mostly directional topics with great difficulty and scale. However, it can be divided into several small topics and embodied. Researchers should start from their own advantages, form a relatively certain topic, and ensure its feasibility. In all kinds of scientific research plans made by governments and scientific research departments at all levels, many production practice research topics are also put forward for selection. In addition, the topic selection serves the production practice, and researchers go out of the laboratory to be familiar with the production process, timely understand and discover the theoretical and technical problems raised in the production process, and screen out research topics that conform to scientific principles and are suitable for technical process development. For example, through the investigation of the production practice of semi-suspended ropeway skidding, it is found that improper binding position of wood leads to skidding delay, low production efficiency, high labor intensity and even accidents. Taking the problems that need to be solved urgently in production as the subject, it is of great practical value to find ways to shorten the skidding time, quickly eliminate the jam, improve the skidding efficiency and increase the skidding output of ropeway.