1. Laboratory experiment method: Conduct controlled variable experiments in the laboratory to observe and measure the influence of different factors on the research object. This method usually requires accurate equipment and instruments, as well as specially trained experimenters.
2. On-the-spot experiment method: Experiment in natural environment, and observe and measure the behavior and reaction of the research object in real environment. This method can simulate the real situation well, but it is greatly influenced by environmental factors.
3. Questionnaire survey method: collect the opinions, opinions and experiences of the research subjects by designing questionnaires. This method is suitable for studying social phenomena and human behavior, but it is influenced by the subjectivity of the respondents.
4. Case study method: Through in-depth analysis of individual cases, the characteristics, laws and problems of the research object are discussed. This method is suitable for studying complex phenomena and cases, but it is limited by the number and representativeness of samples.
5. Comparative research method: By comparing different objects or groups, explore their similarities and differences. This method is suitable for studying causality and influencing factors, but it is limited by comparability.
6. Literature review: By combing and analyzing the existing literature, summarize and evaluate the current situation and development trend of this research field. This method is suitable for studying theoretical and historical problems, but it is affected by the quality and reliability of documents.
7. Mathematical modeling method: describe and predict the behavior and changes of the research object by establishing a mathematical model. This method is suitable for studying quantitative problems and dynamic processes, but it is limited by model assumptions and parameter selection.