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基于多图时空注意力的轨道交通客流预测模型 被引量:3
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作者 陈俊彦 黄雪锋 +2 位作者 韦俊宇 卢贤涛 卢小烨 《郑州大学学报(理学版)》 CAS 北大核心 2023年第4期39-45,共7页
针对轨道交通客流由于复杂的时空相关性和显著的波动性而难以预测的问题,提出一种基于注意力机制和多图视角图神经网络的轨道交通客流量预测方法MGCNSTA。基于站点连接的邻接图和乘客出行的出发地-目的地(origin-destination, OD)图,采... 针对轨道交通客流由于复杂的时空相关性和显著的波动性而难以预测的问题,提出一种基于注意力机制和多图视角图神经网络的轨道交通客流量预测方法MGCNSTA。基于站点连接的邻接图和乘客出行的出发地-目的地(origin-destination, OD)图,采用长期和短期两种序列模式,通过图卷积神经网络和卷积神经网络分别捕获空间和时间序列特征,并运用注意力机制加强卷积模块的时空相关性特征。对杭州地铁短期客流量进行了预测,实验结果验证了模型的有效性。 展开更多
关键词 轨道交通 注意力机制 多图视角 神经网络
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Generic Variation & Private Intention: A MultiDimensional Exploration of Book Reviews and Prefaces
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作者 Liang XIAO Liming DENG 《Chinese Journal of Applied Linguistics》 2018年第1期47-66,120,共21页
Based on Bhatia's multi-dimensional analytical framework for discourse analysis, we explore key issues involved in genres construction such as private intention, manipulation of generic value and interdiscursive stra... Based on Bhatia's multi-dimensional analytical framework for discourse analysis, we explore key issues involved in genres construction such as private intention, manipulation of generic value and interdiscursive strategies. Two prefaces and two book reviews by expert linguists were collected and analyzed at great length from both text-internal and text-external perspectives. Meanwhile, four professionals from relevant disciplines were interviewed for their insights into the issues investigated. Through examining textual features, covert interdiscursivity and narrative accounts of the professional writers, the following findings are generated. 1) Generic variation occurs within and between the two genres due to expert writers' intentional manipulation of generic value. 2) Interdiscursive strategies like "genre embedding", "genre bending" and "genre mixing" are exploited by expert writers to achieve their particular private intention. Specifically, preface genre can be presented, to some extent, as a research article mixed with some promotional flavor, and features of research article genre, promotional genre and introductory genre are found mixed in the review genre. 3) Representations of the preface and book review genres such as linguistic feature, move structure and interdiscursivity are ultimately affected by generic value, authors' private intention, professional practice and disciplinary culture. The findings have important implications for ESP/EAP writing practitioners and learners. 展开更多
关键词 text-internal text-external private intention INTERDISCURSIVITY generic value multi-dimensional analytical perspective
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