A new type of light fiehl display is proposed using a head-mounted display (HMD) and a micro structure array (MSA, lens array or pinhole array). Each rendering point emits abundant rays from different directions i...A new type of light fiehl display is proposed using a head-mounted display (HMD) and a micro structure array (MSA, lens array or pinhole array). Each rendering point emits abundant rays from different directions into the viewer's pupil, and at one time the dense light field is generated inside the exit pupil of the HMD through the eyepiece. Therefore, the proposed method not only solves the problem of accommodation and convergence conflict in a traditional HMD, but also drastically reduces the huge data in real three-dimensional (3D) display. To demonstrate the proposed method, a prototype is developed, which is capable of giving the observer a real perception of depth.展开更多
"民以食为天""食以安为先",食品安全问题历来备受关注,消费者在食品选择或消费时会努力寻找各种证明食品安全的有效线索,其中信誉标签结构线索(Cues of Credence-label Structure)是消费者较为重视的有效线索。从..."民以食为天""食以安为先",食品安全问题历来备受关注,消费者在食品选择或消费时会努力寻找各种证明食品安全的有效线索,其中信誉标签结构线索(Cues of Credence-label Structure)是消费者较为重视的有效线索。从实践看,虽然已有研究表明消费者对食品信誉标签结构线索持积极态度,由于信息不对称仍然存在消费者无法准确评估信誉标签结构线索而产生消费决策偏差的现象,在一定程度上限制了消费者的决策质量与消费满意。本文基于证实性偏差理论提出信念一致性框架模型,试图探索信誉标签结构线索与健康食品争议类型的交互作用及信念一致性的中介机制。研究结果表明,在信誉标签结构线索(产品层面与成分层面)与健康食品争议类型(无争议健康食品与有争议健康食品)交互作用下,消费者会对健康食品的购买意愿产生差异:产品层面,信誉标签线索在无争议的健康食品消费情境中存在证实性偏差,导致更强的健康信念一致性,并在健康信念一致性的中介作用下,对消费者健康食品购买意愿产生积极影响;成分层面,信誉标签线索在有争议的健康食品消费情境中不存在证实性偏差,导致更弱的不健康信念一致性,并在不健康信念一致性的中介作用下,对消费者健康食品的购买意愿产生积极影响。这些研究结论在深化和拓展信誉标签结构线索等理论体系及其适用边界的同时,对消费者健康和福利及企业营销实践等具有重要意义。展开更多
基金partially supported by the National Basic Research Program of China(No.2013CB328805)the National Science Foundation of China(NSFC,No.61205024,61178038)the National Key Technology R&D Program(No.2012BAH64F03)
文摘A new type of light fiehl display is proposed using a head-mounted display (HMD) and a micro structure array (MSA, lens array or pinhole array). Each rendering point emits abundant rays from different directions into the viewer's pupil, and at one time the dense light field is generated inside the exit pupil of the HMD through the eyepiece. Therefore, the proposed method not only solves the problem of accommodation and convergence conflict in a traditional HMD, but also drastically reduces the huge data in real three-dimensional (3D) display. To demonstrate the proposed method, a prototype is developed, which is capable of giving the observer a real perception of depth.
文摘"民以食为天""食以安为先",食品安全问题历来备受关注,消费者在食品选择或消费时会努力寻找各种证明食品安全的有效线索,其中信誉标签结构线索(Cues of Credence-label Structure)是消费者较为重视的有效线索。从实践看,虽然已有研究表明消费者对食品信誉标签结构线索持积极态度,由于信息不对称仍然存在消费者无法准确评估信誉标签结构线索而产生消费决策偏差的现象,在一定程度上限制了消费者的决策质量与消费满意。本文基于证实性偏差理论提出信念一致性框架模型,试图探索信誉标签结构线索与健康食品争议类型的交互作用及信念一致性的中介机制。研究结果表明,在信誉标签结构线索(产品层面与成分层面)与健康食品争议类型(无争议健康食品与有争议健康食品)交互作用下,消费者会对健康食品的购买意愿产生差异:产品层面,信誉标签线索在无争议的健康食品消费情境中存在证实性偏差,导致更强的健康信念一致性,并在健康信念一致性的中介作用下,对消费者健康食品购买意愿产生积极影响;成分层面,信誉标签线索在有争议的健康食品消费情境中不存在证实性偏差,导致更弱的不健康信念一致性,并在不健康信念一致性的中介作用下,对消费者健康食品的购买意愿产生积极影响。这些研究结论在深化和拓展信誉标签结构线索等理论体系及其适用边界的同时,对消费者健康和福利及企业营销实践等具有重要意义。