Abstract: In?order?to?study?the?impact?of?color?on?distance?cognition?in?dynamic?environment?at?night?and?analyze?the?changing?rules?of?difference,32?drivers?are?selected?to?attend?the?real?road?experiment?in?cases?of?different?depth?distance?and?different?velocity.?Results?of?all?cognition?are?summed?up?and?tested,?and?the?characteristic?value?of?cognition?difference?is?obtained.?The?variation?trend?of?cognition?difference?is?simulated?by?BP?neural?network.?Research?results?show?that?in?the?case?of?dynamic?ground?environment?at?night,?the?absolute?distance?cognition?difference?augments?and?the?relative?one?de-?crease?with?the?depth?distance?increasing;in?the?case?of?increasing?the?velocity?and?a?further?depth?distance,?the?absolute?distance?cognition?difference?experiences?decrease,increase?and?decrease?again?chronically?;in?the?case?of?medium?or?nearer?depth?distance?,the?absolute?distance?cognition?difference?decreases?gradually,?and?the?relative?distance?cognition?difference?decreases?with?velocity?increasing.

Key words: dynamic environment , cognition difference , color , BP neural network

摘要： 分析距离判识差异变化规律,选用32名驾驶员在不同深度距离和车速条件下,进行实际道路试验。统计检 验全部被试判识结果,获得距离判识差异特征值。运用BP神经网络,模拟判识差异变化趋势。结果表明:在夜间 地面动态环境中,随着深度距离增加,绝对距离判识差异增大,相对距离判识差异减小;随着速度增加,在较远深度 距离下,绝对距离判识差异先减小后增加再减小,在中等深度距离以下时,差异逐渐减小;相对距离判识差异随速 度增加而减小。

关键词: 动态环境, 判识差异, 颜色, BP神经网络