Abstract This article explores the precautions for online questionnaire surveys in the recognition and promotion of information data mining. For example, attention should be paid to the quality and rationality of questionnaire design to avoid overly complex or ambiguous questions. Pay attention to protecting the privacy and personal information of the respondents. We should fully consider the applicability and accuracy of... This article explores the precautions for online questionnaire surveys in the recognition and promotion of information data mining. For example, attention should be paid to the quality and rationality of questionnaire design to avoid overly complex or ambiguous questions. Pay attention to protecting the privacy and personal information of the respondents. We should fully consider the applicability and accuracy of data mining technology to avoid misleading or erroneous conclusions. Summarized the application value and advantages of online questionnaire surveys in information data mining recognition and promotion. The combination of online questionnaire surveys and data mining technology can help enterprises better understand market demand and consumer behavior, develop more accurate and personalized promotion plans, and improve the effectiveness and efficiency of market promotion. At the same time, this application can also help enterprises reduce the cost and risk of market promotion, and improve their competitiveness in the market. Read More Read Less

Abstract This article validates and tests a table tennis trajectory prediction model based on a computer angle ELM algorithm. By comparing with actual competition results, it was found that the model has high accuracy and reliability in predicting the trajectory of table tennis. At the same time, the model can also provide athletes with more accurate competition strategies and suggestions based... This article validates and tests a table tennis trajectory prediction model based on a computer angle ELM algorithm. By comparing with actual competition results, it was found that the model has high accuracy and reliability in predicting the trajectory of table tennis. At the same time, the model can also provide athletes with more accurate competition strategies and suggestions based on different competition situations and opponent levels. Finally, this article summarizes table tennis trajectory prediction’s application value and advantages based on a system perspective ELM algorithm. This algorithm provides athletes with more accurate competition strategies and suggestions and helps coaches better understand athletes’ sports characteristics and levels, providing an important reference basis for training and competition. At the same time, this algorithm can be extended to other ball games, providing broader application value for athletes and coaches. Read More Read Less

Abstract This article provides a detailed introduction to the specific implementation process of this analysis method. A comprehensive analysis of the plantar pressure distribution has been achieved by preprocessing, feature extraction, and pattern classification of the collected plantar pressure data. Specifically, precise descriptions of athlete gait are achieved by extracting the temporal and spatial features of pressure data. The evaluation and... This article provides a detailed introduction to the specific implementation process of this analysis method. A comprehensive analysis of the plantar pressure distribution has been achieved by preprocessing, feature extraction, and pattern classification of the collected plantar pressure data. Specifically, precise descriptions of athlete gait are achieved by extracting the temporal and spatial features of pressure data. The evaluation and diagnosis of athlete gait were achieved by classifying the plantar pressure patterns under different gait patterns. The feasibility and effectiveness of this analysis method were verified through experiments. The experiment selected 20 football players as the research subjects and collected foot pressure data at different speeds. By comparing and analyzing the distribution characteristics of plantar pressure at different speeds, the adaptability of this analysis method was verified at different speeds. At the same time, the effectiveness of this analysis method in evaluating and diagnosing the gait of football players was demonstrated through statistical analysis of the experimental results. Read More Read Less