排序方式: 共有48条查询结果,搜索用时 0 毫秒
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阐述了智能交通系统的基本组成和功能,给出了智能交通系统的基本模型.针对传统智能交通系统中求取路段平均速度和平均旅行时间的算法进行了探讨和改进,引入流量融合技术对路段的平均速度进行估测,估测精度得到了提高.通过构造一个时间相关的协方差矩阵来描述各路段之间的相关性,提高了算法的全面性和准确性. 相似文献
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为了最大限度的减少后天因素对注意力先天发育水平的影响,以3岁幼儿为研究对象,在分析现有对注意力研究的基础上,提出注意力表现因素测评指标框架;依据注意力共性表现因素并结合3岁幼儿注意力的个性表现,进行了测评指标实验研究。首先,对实验方案进行信度和效度检验,结果表明:本方案有较好的信度与效度;其次,通过对实验结果的性别和年龄差异性分析,认为该被试群体可以作为标准化样本,并对其测试结果进行常模测算;最后,通过西安地区不同水平幼儿园随机抽样的297名被试注意力的常模测算,结果显示,其与理论分布接近,表明这种测评方法具有普适性与可操作性。 相似文献
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The paper crosses the boundaries between different genres, drawing on key material and emphasising the philosophical challenges around decision-making and values in relation to replication and replicas. In 1968, Philip K. Dick wrote the book Do Androids Dream of Electric Sheep? which became the inspiration for the 1982 film Bladerunner. The book is set in Los Angeles in a post-apocalyptic future where mankind has left Earth, resulting in androids being created to develop new ‘off-world’ colonies. The book and film create a novel and interesting framework to discuss the subject of replicas and replication within contemporary conservation practice. Key themes are decay promoting replication, original versus replica, creating empathy in replication. The debate focuses on the case study of Naum Gabo's Construction in Space (Crystal) of 1937–39; which was the sculpture replicated in the most recent replication project at Tate, completed in July 2015. 相似文献
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