Construction And Analysis Of Football Key Technical And Tactical Index Hierarchy System Based On FATJ Database

Since the professionalization of Chinese football,due to factors such as institutional security,social foundation,and industry atmosphere,Chinese football has fallen behind the rapidly developing world football in all aspects.In recent years,with the increasing efforts of domestic policies,professional football in China has ushered in valuable development opportunities.The level of football skills and tactics to a certain extent determines the level of competitive ability,and the construction of the evaluation system of technical and tactical indicators provides a guarantee for the research of technical and tactical aspects,which is conducive to improving the development level of football skills and tactics in China.The annual statistical report on the technical and tactical data of CSL teams released by the Chinese Football Association mainly comes from the FATJ database.Based on the data and indicators provided by this database,analysis is conducted to identify indicators that play a key role in match results,and a football key technical and tactical indicator system is constructed to provide theoretical basis for the technical and tactical training and development of various teams in the CSL,which is of great significance for the development of football in China.First,the indicator system is initially established according to the principles of scientificity,systematism and operability as well as the classification criteria of technology and tactics.Then,the indicators are screened by Delphi method,and the weights are determined by analytic hierarchy process.Then,it is verified whether the hierarchical system can solve practical problems.Finally,it is combined with the IPA comprehensive quadrant analysis method for application research.The main conclusions are as follows:(1)The hierarchical system of football key technical and tactical indicators is used to measure the technical and tactical performance of teams or players.It is a group of quantitative,intuitive and operable indicators that can play a key role in the results and process of football matches.Its function is to evaluate whether the design and implementation of technology and tactics have achieved the goal of technology and tactics,and make decisions for improvement and promotion according to the evaluation results.Through the steps of "sorting,identification,screening and confirmation",this study finally determined that the hierarchy system of football key technical and tactical indicators was composed of 10 first-level indicators and 52second-level indicators.(2)The analytic hierarchy process calculation results show that the weight coefficients of all first-level indicators are in the following order: B3 goal(0.195),B4 assist(0.177),B9set-piece defense(0.148),B2 shot(0.107),B10 core player’s ability and advantage(0.100),B6set-piece attack(0.081),B8 sports defense(0.069),B5 attack organization(0.065),B11 coach’s ability to guide the competition(0.039),B7 foul and harm degree(0.019).The weight coefficient of the second-level index ranks in the top ten indicators: C49 opponent’s corner kick cooperation success,C11 total goals,C19 short pass and assist,C50 opponent’s front court free kick cooperation success,C31 corner kick cooperation success,C08 shooting rate,C07 shooting total,C24 right bottom pass and middle assist,C21 left long pass and auxiliary,C23 right long pass and auxiliary.Teams need to focus on evaluating their technical and tactical performance and formulating technical and tactical goals.(3)Use the latest data from the FATJ database as a sample to test the hierarchical system.From the perspective of the scores of each team’s hierarchical system and the actual ranking,the top six are completely consistent,indicating that the evaluation accuracy of the system for the upstream teams is high.According to the correlation between the scores of each team and the calculated scores of the system,the correlation coefficient is r = 0.961(P< 0.01),showing a significant correlation.It shows that the result calculated by the hierarchy system of key technical and tactical indicators of football can basically reflect the actual ranking situation,and the construction of this system is more reasonable.(4)For the application of football key technical and tactical hierarchy system,this study takes the technical and tactical samples of Shandong Luneng Mount Taishan Team as an example to show the application process.The specific method is "data extraction-normalization processing-IPA quadrant drawing-comprehensive analysis".The technical and tactical performance of the Shandong team is good,with 13 indicators in the sustained maintenance area,and only 1 evaluation indicator ranking in the top ten in weight value is not in the sustained maintenance area.The long pass and hanging play in the left diagonal long pass and right bottom pass are advantageous tactics.There are 8 indicators in the urgent need for improvement area that need to be focused on,mainly reflected in the cultivation of set-piece attacking ability and the cultivation of breakthrough players.