Kinematical analysis of the takeoff preparation techniques for high jump;

Assessment indices of take-off techniques in long jump;

Basing on the characteristics of the take-off techniques for Fosbury style high jump in such 3 aspects as the athlete′s run speed,effect of swinging leg and actual effect of takeoff leg,the author revealed the laggard cause of Fosbury style High-Jumping in china is the little uprightness rate of jumpin.

The authors made a comprehensive review of the long jump research on approach speedand take-off technique.

Based on the related statistical data, the article has concluded the interrelations between the run-up speed and take-off techniques and the effects on the competition results.

This paper analyzes the run up speed and the take off technique of two famous American long jumpers,who broke the world record in the male long jump,and points out the characteristics of the long jump technique in the modern world as well as their impacts on improving the performances according to the latest sports information of the world.

the paper aims at the technical preparation works of general survey for urban underground pipeline,amply dissertates the method and step of the process quality control upon the following six aspects: data collection,locale exploration,method test of detecting apparatus,coherence checkout of detecting apparatus,technical plan script workout and technology explaination.

Take Anchu Expressway Reconstruction Project as example, the article details the construction technology of cojoint section by technical preparation, re-use of side slope soil, .

This paper introduces the main points and considerations of the preparation works before construction of highway engineering, illustrates the main contents of technical preparation stages, and advances some requirements of cleaning up the construction site, and constructing the temporary works, etc.