In the aspect of vehicle plate location, author adopt the algorithm of the frequency of gray scale alternate to seek approximately location.
在车牌定位方面，本文采用了灰度跳变频率算法进行粗定位。
2
The alternate test of static load and dynamic load on RC beam serves the study of the frequency change disciplinarian from integrity to destroy of RC beam.
通过对钢筋混凝土梁进行不同荷载等级下静载和动载的交替实验，得到混凝土梁从完整到破坏的频率变化规律。
3
Conclusion the bidirectional alternate traction manipulation plus low frequency electric stimulation are effective in the treatment of the vertebral-artery-type cervical spondylosis.