摘要
In clinical assessment or sports exercise,it is common that a subject is required to repeat a specific per- formance so that a stable movement pattern is obtained and analysed.In practice,however,the trials done by a sub- ject vary more or less,depending on the psychological or physical conditions.Some of the trials can be used as rep- resentatives of the stable movement pattern,and some not.Therefore,there is a demand for a new method to identify which trials/curves are similar.The traditional methods used to assess curve similarity are not perfectly suitable for the case where there are only a few of trials available.This study proposes a similarity-distance coefficient to assess the similarity of curves/trials.A group of designed curves are used to validate the coefficient.The results show that given joint kinematic data during gait as examples,the proposed coefficient can be used to quantitatively evaluate the similarity of trials,and thus find which trials would be representative (s) for the gait investigated.The proposed method could be applied in various situations where repeat movements have to be measured and analysed.
In clinical assessment or sports exercise, it is common that a subject is required to repeat a specmc performance so that a stable movement pattern is obtained and analysed. In practice, however, the trials done by a subject vary more or less, depending on the psychological or physical conditions. Some of the trials can be used as representatives of the stable movement pattern, and some not. Therefore, there is a demand for a new method to identify which trials/curves are similar. The traditional methods used to assess curve similarity are not perfectly suitable for the case where there are only a few of trials available. This study proposes a similarity-distance coefficient to assess the similarity of curves/trials. A group of designed curves are used to validate the coefficient. The results show that given joint kinematic data during gait as examples, the proposed coefficient can be used to quantitatively evaluate the similarity of trials, and thus find which trials would be representative （s） for the gait investigated. The proposed method could be applied in various situations where repeat movements have to be measured and analysed.
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2008年第10期2017-2023,共7页
Chinese Journal of Scientific Instrument
基金
the Chinese National Education Committee for supporting his visit to UK in 1995.
关键词
曲线
相似性
模拟技术
测量方法
curve
similarity
distance
multi trial
gait analysis
