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自我肯定在风险性信息传播中的作用研究
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作者 吕朋悦 赵红 《管理学报》 CSSCI 北大核心 2017年第5期730-741,共12页
自我肯定能削弱人们对于风险性信息的心理防御,增强信息说服效果,但当前对自我肯定会否引发过度反应尚不明确。为此设计了随机分配实验,通过回归与显著性区域检验发现:(1)自我肯定对风险性信息说服的促进作用随着防御反应增强而增强;(2... 自我肯定能削弱人们对于风险性信息的心理防御,增强信息说服效果,但当前对自我肯定会否引发过度反应尚不明确。为此设计了随机分配实验,通过回归与显著性区域检验发现:(1)自我肯定对风险性信息说服的促进作用随着防御反应增强而增强;(2)在低相关性接收者中,自我肯定能增强信息在防御反应较强接收者中的说服效果,并削弱过度反应,如过度恐惧情况;(3)在相关性较高的接收者中,自我肯定增强说服的作用不甚明显,甚至存在加剧高相关与高防御接收者对信息反应不足的情况。检验了自我肯定对风险性信息说服效果的边界条件,对自我肯定与风险性信息沟通理论形成补充;且指出了应用自我肯定方法的适用对象。 展开更多
关键词 自我肯定 乐观性偏差 防御反应 风险性信息 一类错误 二类错误
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Real-time lane departure warning system based on principal component analysis of grayscale distribution and risk evaluation model 被引量:4
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作者 张伟伟 宋晓琳 张桂香 《Journal of Central South University》 SCIE EI CAS 2014年第4期1633-1642,共10页
A technology for unintended lane departure warning was proposed. As crucial information, lane boundaries were detected based on principal component analysis of grayscale distribution in search bars of given number and... A technology for unintended lane departure warning was proposed. As crucial information, lane boundaries were detected based on principal component analysis of grayscale distribution in search bars of given number and then each search bar was tracked using Kalman filter between frames. The lane detection performance was evaluated and demonstrated in ways of receiver operating characteristic, dice similarity coefficient and real-time performance. For lane departure detection, a lane departure risk evaluation model based on lasting time and frequency was effectively executed on the ARM-based platform. Experimental results indicate that the algorithm generates satisfactory lane detection results under different traffic and lighting conditions, and the proposed warning mechanism sends effective warning signals, avoiding most false warning. 展开更多
关键词 lane departure warning system lane detection lane tracking principal component analysis risk evaluation model ARM-based real-time system
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