1) visual cognition
视认性
1.
Relationship between information quantity and visual cognition of traffic guide sign;
交通指路标志信息量与视认性关系
2) visibility of characters
汉字视认性
3) Traffic signs comprehension
标志视认性
4) legibility distance
视认距离
1.
The change rule of visual field in the dynamic environment is analyzed,and legibility distances are meas- ured under different velocities by dynamic experiments The results of experiments show that the effects of velocity on the legibility distance are not significant below a velocity of 120km/h,and the results are also analyzed with the theory of psychology and vision.
分析了动态条件下视野的变化规律,通过实车动态实验测定不同速度下标志汉字的视认距离。
5) digital television identification charging system
数字电视认证收费系统
补充资料：许认
1.同意﹑承认。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。