Research of numerical value simulation on the influence of large displacement on gear dynamics performance;

This paper uses literature data,the survey method,mathematical statistics methods to analysis the college teaching weaving in the current situation in Jilin province deeply,the results showed that:college Roller Skating Teaching in Jilin Province,in the teaching establishment of content,the status quo contingent of teachers,teaching materials and other aspects of protection in a certain issue.

In roller skating teaching, the double assistant method can effectively increase the students’ lowerlimbs strength, enhance their support ablity, upbuild the correct action format and has a positive effect on promoting the communication and intercourse among the students in the universities.

With the methods of documentary,interview survey,questionnaire,mathematical statistics methods,the article has an investigation of the current development status of roller skating teaching in universities in Beijing and put forward many methods and countermeasures of carrying out roller skating teaching in common high university.

The analysis and protecting measures on the questions of drive gear tooth fracture;

The fracture problem of gear tooth is discussed based on engineering example in this paper.