The dynamic performance of tennis racket has been studied in this paper by means of the Experimental Modal Analysi(EMA) method.
本文应用实验模态分析方法对网球拍的动态性能进行了测试 ,分析了不同网球拍在击球过程中的击球稳定性及对肘的不同伤害程
Based on the testing index of 10 meters coming-and-going run,standing long jump,tennis throw far,both legs jump in succession,crook before the seat body and balance beam of 3-6 years old in Shandong,the article gives an analysis on age,sex and characteristics in urban and rural areas for 3-6 years old,and announced the trends and laws of its natural change.
通过对山东省3~6岁幼儿10米往返跑、立定跳远、网球掷远、双腿连续跳、坐位体前屈、走平衡木6项体能指标的测试,分析了山东省3~6岁男女、城乡幼儿体能变化的年龄、性别与城乡特点,揭示了其自然变化的趋势与规律。