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多跳连接残差注意网络的图像超分辨率重建 被引量:4
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作者 刘遵雄 朱成佳 +1 位作者 黄稷 蔡体健 《计算机科学》 CSCD 北大核心 2021年第11期258-267,共10页
随着卷积神经网络深度的不断增加,深度卷积神经网络的训练会变得更加困难。此外,在图像超分辨率中,低分辨率图像的通道特征和输入通常在不同的通道中被平等对待,这就导致了卷积神经网络的表征能力被弱化。为了解决这些问题,提出了一种... 随着卷积神经网络深度的不断增加,深度卷积神经网络的训练会变得更加困难。此外,在图像超分辨率中,低分辨率图像的通道特征和输入通常在不同的通道中被平等对待,这就导致了卷积神经网络的表征能力被弱化。为了解决这些问题,提出了一种多跳连接残差注意网络,该网络利用多跳连接中的残差(Residual in Multi-skip Connection,RIMC),构造了具有多个残差组的深度网络。每个残差组包含了一定数量的短跳连接和多跳连接。在RIMC的基础上,主网络被允许穿过多跳连接来绕过丰富的低频信息,同时高频信息也可以被主网络集中地学习。另外,考虑到通道和空间维度的相互依赖关系,提出了注意机制块(Attention Mechanism Block,AMBlock)来关注信息的位置,并自适应地调整通道特征尺度,其中通道注意机制和空间注意机制被应用在这种方式中。实验结果表明,该网络可以更好地恢复图像细节,获得更高的图像质量和网络性能。 展开更多
关键词 图像超分辨率 注意机制块 残差网络 多跳连接中的残差 跳连接
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Role of mountains and rivers in the formation of logistics enterprises'spatial pattern in the central urban areas of Chongqing
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作者 LIU Si-jing zhu cheng-jia +1 位作者 HE Nan-nan LI Guo-qi 《Journal of Mountain Science》 SCIE CSCD 2022年第7期2060-2074,共15页
The complex landforms of a Shan-shui City(Shan-shui refers to mountains and rivers)significantly impact the selection of locations for logistics enterprises.This paper takes Chongqing,one of the most typical Shan-shui... The complex landforms of a Shan-shui City(Shan-shui refers to mountains and rivers)significantly impact the selection of locations for logistics enterprises.This paper takes Chongqing,one of the most typical Shan-shui Cities in China,as the research object,and adopts spatial analysis methods and a mediating effect model,to explore the role of mountains and rivers in the formation of logistics enterprises’spatial pattern on the street scale.The study results reveal that 90% of the logistics enterprises in the central urban areas of Chongqing are located in the low-altitude area below 353m above sea level,and distributed in a north-south direction along the mountains,as a result of blockage by mountain ranges,such as those of Zhongliang Mountain and Tongluo Mountain.More than 70% of the logistics enterprises are located less than 5 km from either the Yangtze River or Jialing River,spreading along the rivers.In addition,more than half of the logistics enterprises in commercial and financial,and residential land are located within the urban core area,while 80.83% of the logistics enterprises located in warehousing land and industrial land are concentrated in the urban expansion area.In areas with high land prices,the negative effect of altitude on logistics enterprise agglomeration is weakened,while the promotion effect of river proximity on logistics enterprise agglomeration is enhanced.In the urban core area with the advantage of low altitude and proximity to the Jialing and Yangtze Rivers,the role of mountains and rivers on logistics enterprises is not apparent;in contrast,in the urban expansion area with more complex landforms,land price can be an effective means for the government to macro-manage the spatial pattern of logistics enterprises in a Shan-shui City. 展开更多
关键词 Logistics enterprise Spatial pattern Influencing factors Driving mechanism CHONGQING
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