Results 21 to 30 of about 13,106 (168)
基于双重注意力变换模型的分布式屋顶光伏变电站级日前功率预测 [PDF]
全球能源互联网分布式屋顶光伏地理位置分散，受地理环境遮挡和多种气象因素影响，导致光伏出力特性存在差异，给变电站级分布式屋顶光伏日前功率预测造成挑战。针对上述问题，提出了一种基于双重注意力变换模型的分布式屋顶光伏变电站级日前功率预测方法。首先，基于动态时间规整算法计算分布式光伏用户出力特性间的相似度，并基于凝聚层次聚类法将其划分成若干类；然后，利用自主注意力网络学习各时间步间的时序关联特性，通道卷积注意力机制学习多特征变量间的相关性，构建日前功率预测模型；最后，将每一类日前预测结果相加，实现变电站级日前功率预测 ...
王光华 +5 more
doaj +1 more source
Image recognition method of coal gangue in complex working conditions based on CES-YOLO algorithm [PDF]
Aiming at the complex working conditions environmental factors such as high noise, low illumination, motion blur and mass gangue mixing in coal mines, which lead to the problems of misdetection, omission and low detection accuracy in gangue recognition ...
Deyong LI +4 more
core +1 more source
Semi-supervised Classification for Short Text Based on Multi-grained Graphs and Attention Mechanism [PDF]
Sparse and fuzzy semantics, insufficient information, and irregular expressions in short texts pose great challenges to short text classification tasks.
YOU Ben, LI Xiaohong, YAO Jin, FENG Shaojie
core +1 more source
International Journal of Applied Linguistics, EarlyView.ABSTRACT Multilingual students in Anglophone universities often operate in survival mode. While translanguaging supports learning, critical gaps remain in understanding how translanguaging pedagogies transform and sustain motivation in English‐dominant contexts.
Melissa Jufenna Slamet, Julie Choi
wiley +1 more source
Dizhen xuebao为了提高频散曲线反演算法的精度，本文提出一种将自注意力机制与宽度学习相结合的瑞雷面波频散曲线反演方法。该方法在宽度学习系统的基础上引入自注意力机制，通过注意力加权的方式对提取到的面波特征进行融合与变换，以增强宽度学习系统的特征学习能力，进而实现面波频散曲线的更高精度反演。然后对典型地层模型生成的理论合成数据进行反演测试，结果显示本文所提智能反演算法可高效完成面波频散曲线反演。最后通过实际资料的反演测试验证该方法能够获得地层横波速度的高精度估计结果，有望在工程勘察与浅层地质勘探中得到广泛应用。
Xianna Lu +6 more
doaj +1 more source
Research on Insulator Detection Algorithm for High-Speed Rail Contact Network [PDF]
To satisfy the requirements of intelligent inspection at a greater level, a rotated insulator target detection algorithm based on the improved YOLOv5 is proposed to solve the inadequacy of conventional detection algorithms used for contact networks in ...
LIU Shibing, ZHOU Shihan
core +1 more source
International Journal of Applied Linguistics, EarlyView.ABSTRACT This study examines how foreign language teachers’ beliefs about the medium of instruction and translanguaging evolve over time by revisiting three in‐service teachers twelve years after their initial interviews. Using a qualitative longitudinal design, the study traces how translanguaging was initially framed as pedagogically deficient but ...
Danping Wang
wiley +1 more source
Gaoya dianqi, 2022 绝缘子串是输电线路系统中至关重要的器件之一，基于图像处理的绝缘子串识别，能够更快更准确地识别到绝缘子串。针对输电线路中绝缘子串与绝缘子串、绝缘子串与背景之间相互干扰导致目标识别时存在误差较大的问题，提出一种融入注意力机制的YOLOv3绝缘子串识别方法。该方法在YOLOv3模型的基础上，首先在特征提取网络Darknet-53中加入无参注意力SimAM，聚焦网络和增强有效特征，抑制干扰特征，提高网络对绝缘子串的注意能力；其次根据绝缘子串的形状特征，调整模型预设Anchor box的值；最后以焦点损失 ...
李季 +4 more
doaj
Multimodal Relation Extraction Based on Bidirectional Attention Mechanism [PDF]
Conventional relation extraction methods identify the relationships between pairs of entities from plain text, whereas multimodal relation extraction methods enhance relation extraction by leveraging information from multiple modalities.
WU Haipeng, QIAN Yurong, LENG Hongyong
core +1 more source
International Journal of Applied Linguistics, EarlyView.ABSTRACT While English‐medium instruction (EMI) and English for Academic Purposes (EAP) courses are designed to promote language and content learning, their prevailing English‐only approaches often undermine students’ learning motivation. Against this backdrop, translanguaging has gained recognition as an effective pedagogical practice to support ...
Yihai Wen, Fan Fang
wiley +1 more source