The methods of observation and mathematical statistics were adopted to analyze the technical skill of attack move of the elite juvenile goalkeepers in China.

Through investigating and comparing juvenile delinquents with lawful adolescents in psychological traits,we found that juvenile delinquents are markedly higher in terms of sexual,passionate and material desires and rebellious mentalities,but evidently lower in internal attributions without predominant difference in external attributions.

However,it is still popular that the home-left children lack of law and discipline education,and they have obvious problems relating to their safety,education,emotion and mentality.

Analysing the character of tactics of football goal-keeper;

By defining the three attributes of the goal-keeper,a concrete policy of the goal-keeper for the ball in different districts of the field is designed.

Through the total abstraction of ground information,a positive defending policy of the goal-keeper with the ball being the center is designed.

Research on defense strategy of the goalie in micro robot soccer;

The goalie in the RoboCup intelligence system is a especial agent,and the catch is a especial act too.

Taking the MiroSot robot as the study object, the paper made a deep study on thevision system and the defense strategy of goalie through practicing theory.

On tactical consciousness of a goalkeeper;