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高频信息强化的双分支高光谱图像超分辨率网络

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计算机系统应用 2024年第10期33卷 217-227页

作者：侯钧译杨锦边太成朱习军青岛科技大学信息科学技术学院青岛266061

高光谱图像(hyperspectral image,HSI)的窄光谱波段为许多视觉任务提供了丰富信息,但也给特征提取带来了挑战.尽管许多研究者提出了各种深度学习方法,但尚未充分结合这些架构的优势.因此,本文提出了一种基于高频信息强化的双分支高光谱... 详细信息

高光谱图像(hyperspectral image,HSI)的窄光谱波段为许多视觉任务提供了丰富信息,但也给特征提取带来了挑战.尽管许多研究者提出了各种深度学习方法,但尚未充分结合这些架构的优势.因此,本文提出了一种基于高频信息强化的双分支高光谱图像超分辨率网络(HFEDB-Net),将卷积神经网络(convolutional neural network,CNN)的图像空间特征提取优势与Transformer的自适应能力和长距离依赖提取优势相结合,有效地提取了HSI的空间和光谱信息.HFEDB-Net由高频信息强化分支和主干分支组成.在高频信息强化分支中,通过拉普拉斯金字塔提取低分辨率和高分辨率HSI的高频信息,并将结果作为高频分支的输入和标签,采用光谱强化Transformer来作为该分支的方法.在主干分支中,使用结合通道注意力的CNN充分提取空间特征和光谱信息.最后将两个分支的结果通过CNN进行结合以得到最终的重建图像.此外,采用多头注意力和多尺度策略分别改进了Transformer的注意力机制和编码器层,以更好地提取HSI的空间和光谱信息.实验结果表明,HFEDB-Net在两个公开数据集上的定量评价指标和视觉效果上优于当前主流方法.

关键词：高光谱图像超分辨率重建自注意力机制神经网络

基于分组双阶段双向卷积长短期方法的高光谱图像超分辨率网络

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智能城市 2024年第4期10卷 1-3页

作者：林建君侯钧译杨翠云烟台职业学院信息工程系山东烟台264670 青岛科技大学信息科学技术学院山东青岛266000

文章提出基于分组的双阶段Bi-ConvLSTM网络(GDBN),可以充分利用图像的空间和光谱信息,通过使用以波段为单位的分组策略,有效缓解了计算负担,并对光谱信息进行保护。在编码器的不同阶段,对浅层信息提取模块和深度特征提取模块进行不同层... 详细信息

文章提出基于分组的双阶段Bi-ConvLSTM网络(GDBN),可以充分利用图像的空间和光谱信息,通过使用以波段为单位的分组策略,有效缓解了计算负担,并对光谱信息进行保护。在编码器的不同阶段,对浅层信息提取模块和深度特征提取模块进行不同层次信息的提取,浅层信息提取模块能够对不同尺度的浅层特征信息进行充分捕捉,深度特征提取模块能够捕捉图像的高频特征信息。文章还引入通道注意力机制,增强网络对特征的组织能力,并在自然数据集cave上进行大量实验,效果普遍优于目前主流的深度学习方法。

关键词：双向卷积长短期记忆网络高光谱图像超分辨率通道注意力神经网络深度学习

Experimental Study on Scouring and Silting Deformation of Artificial Beach Under Storm Surge−Wave Coupling

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China Ocean Engineering 2022年第1期36卷 65-75页

作者： SUN Tian-ting HU Po PAN jun-ning hou yi-jun MO Dong-xue WANG Deng-ting Nanjing Hydraulic Research Institute Nanjing 210029China State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Nanjing 210029China Key Laboratory of Ocean Circulation and Waves Institute of OceanologyChinese Academy of SciencesQingdao 266071China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China Laboratory for Ocean and Climate Dynamics Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China

With the increasing construction of artificial beach in coastal areas, it is of practical significance to study the beach surface deformation of artificial beach profile. Previous studies only focus on a single wave dynamic factor, and it is difficult to predict the beach deformation of artificial beach profile under the storm surge-wave co-action. To solve this problem, the cross-section physical model test method was used to study the beach surface deformation of a typical artificial beach profile in Shuangdao Bay, Weihai, Shandong Province, after continuous wave actions till they stabilize. The characteristics of beach surface deformation under the conditions of constant water levels, laddershaped water level combined with corresponding wave elements and storm surge-wave co-action are compared and analyzed. A beach profile model which satisfies the theory of Bruun model is proposed. The test results show that the maximum scour depth of beach under storm surge-wave co-action is smaller and the scour range is obviously larger than that under the condition of constant water levels or ladder-shaped water level. The evaluation of the maximum scour depth by traditional model test tends to be conservative while the evaluation of the scour range is *** research results can provide scientific reference for designing artificial beaches.

关键词： artificial beach scouring and silting deformation profile shape physical model tests storm surge-wave coupling

SIMULATION OF EDDIES AFFECTED BY TOPOGRAPHY IN A BAROTROPICAL QUASI-GEOSTROPHIC FLUID

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Journal of Hydrodynamics 2001年第3期13卷 74-77页

作者： hou, yi-jun Han, Dong Ren, Yuan Hu, Dun-Xin Inst. of Oceanology Chinese Acad. of Sci. Qingdao 266071 China

Based upon the quasi-geostrophic barotropic equation, taking the effect of seabed topography into account, analytical solutions and simulated eddies associated with different topographies are obtained. Through exhibiting the shape of various eddies we have found some interesting phenomena and had a better understanding of the importance of seabed topography to the eddy shape.

关键词： Differential equations Hydrodynamics Simulation Surface topography

Self-organized Criticality Model for Ocean Internal Waves

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Communications in Theoretical Physics 2009年第3期51卷 490-494页

作者： WANG Gang LIN Min QIAO Fang-Li hou yi-jun Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China First Institute of Oceanography State Oceanic Administration Qingdao 266061 China Key laboratory of Marine Science and .~Tumerical Modeling （MASNUM） State Oceanic Administration Qingdao 266061 China College of Mathematics Ocean University of China Qingdao 266071 China

In this paper, we present a simple spring-block model for ocean internal waves based on the self-organized criticality （SOC）. The oscillations of the water blocks in the model display power-law behavior with an exponent of -2 in the frequency domain, which is similar to the current and sea water temperature spectra in the actual ocean and the universal Garrett and Munk deep ocean internal wave model [Geophysical Fluid Dynamics 2 （1972） 225; J. Geophys. Res. 80 （1975） 291]. The influence of the ratio of the driving force to the spring coefficient to SOC behaviors in the model is also discussed.

关键词： self-organized criticality power law internal waves power spectrum

Experimental Study of Overtopping on Sea Dikes and Coastal Flooding Under the Coupled Processes of Tides and Waves

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China Ocean Engineering 2022年第3期36卷 413-426页

作者： LI Yan-ting ZENG Cheng-jie Zhao yi-han HU Po SUN Tian-ting hou yi-jun MO Dong-xue WANG Deng-ting School of Civil Engineering Tianjin UniversityTianjin 300350China State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Nanjing Hydraulic Research InstituteNanjing 210029China Water Resources Department of Jiangsu Province Nanjing 210029China Key Laboratory of Ocean Circulation and Waves Institute of OceanologyChinese Academy of SciencesQingdao 266071China Center for Ocean Mega-Science Chinese Academy of SciencesQingdao 266071China Laboratory for Ocean and Climate Dynamics Qingdao National Laboratory for Marine Science and TechnologyQingdao 266237China

Storm surges are cataclysmic natural disasters that occur along the coasts and are usually accompanied by large *** effects of coupled storm surges and waves can pose a significant threat to coastal *** labo-ratory studies on the effects of storm surges and waves on coastal structures have typically utilized steady water levels and constant wave *** indoor simulation of the coupled processes of tides and waves is developed by adding a tide generation system to an existing laboratory wave basin to model continuous dynamic tide levels so that tide generation and wave-making occur synchronously in the *** experimental methods are given,which are applied to further study waves overtopping on artificial sea dikes and coastal flooding evolution under the coupled actions of tides and *** results of the overtopping discharge obtained by the test with a dynamic water level are compared with those obtained from steady water level tests and the existing empirical *** addition,the impacts of ecological coastal shelterbelts and structures on coastal flood processes and distributions are also *** proposed simulation methods provide a new approach for studying the effects of storm surges and waves on coastal *** study also aims to provide a reference for coastal protective engineering.

关键词： storm surge water level variation wave overtopping coastal flooding experimental technique

THE EFFECTS OF MONSOONS AND CONNECTIVITY OF SOUTH CHINA SEA ON THE SEASONAL VARIATIONS OF WATER EXCHANGE IN THE LUZON STRAIT

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Journal of Hydrodynamics 2009年第2期21卷 264-270页

作者： ZHAO Wei hou yi-jun QI Peng LE Ken-tang LI Ming-kui Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China Graduate University of the Chinese Academy of Sciences Beijing 100039 China National Meteorological Center Beijing 100081 China

Seasonal variations of water exchange in the Luzon Strait are studied numerically using the improved Princeton Ocean Model （POM） with a consideration of the effects of connectivity of South China Sea （SCS） and monsoons. The numerical simulations are carried out with the strategy of variable grids, coarse grids for the Pacific basin and fine grids for the SCS. It is shown that the Mindoro Strait plays an important role in adjusting the water balance between the Pacific and the SCS. The SCS monsoon in summer seasons hinders the entrance of the Pacific water into the SCS through the Luzon Strait while the SCS monsoon in winter seasons promotes the entrance of Pacific water into the SCS through the Luzon Strait. However, the SCS monsoon does not affect the annual mean Luzon Strait transport, as is mainly determined by the Pacific basin wind.

关键词： numerical experiment Kuroshio Luzon Strait transport seasonal variation

THE EFFECT OF KUROSHIO ON THE CIRCULATION IN CHINA SEAS-FROM SATELLITE-TRACKED DRIFTER DATA

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Journal of Hydrodynamics 2003年第4期15卷 109-112页

作者： hou yi-jun, Su Jing-zhi, Fang Guo-hong, yin Bao-shu, Cheng Ming-hua Institute of Oceanology, Chinese Acdemy of Sciences, Qingdao 266071, China Inst. of Oceanology Chinese Acad. of Sci. Qingdao 266071 China

A dataset derived from satellite-tracked drifting buoy archived at the Marine Envimoment Data Service (MEDS) in Canada are analyzed to study the effect of the Kuroshio on the China Seas, and the results can exhibit th... 详细信息

关键词： drifter Kuroshio China Seas

A 2D/3D COUPLED MODEL FOR WAVE FORCES ON MOORED SHIPS IN A HARBOR

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Journal of Hydrodynamics 2004年第5期16卷 633-639页

作者： QIPeng houyi-jun WANGYong-xue InstituteofOceanology ChineseAcademyofSciencesQingdao266071China StateKeyLaboratoryofCoastalandOffshoreEngineering DalianUniversityofTechnologyDalian116023China

For the purpose of time-domain calculation of wave forces on moored ships ina harbor, the 2D/3D coupled numerical model was developed, in which the horizontally 2Dshallow-water wave model based on the improved Boussinesq equations was adopted for the calculationin the wide region located far from the ships while the 3D numerical model based on theReynolds-Averaged Navier-Stokes (RANS) equations was used in the limited region adjacent to theships. The domain connection technique with overlaping region between different model regions wasapplied and examined. It is shown that the present partially 3D hybrid model saves calculation timesignificantly compared to the full 3D model for the whole region and is capable of reproducing thecharacteristics of 3D and complicated flows around the ships and 3D hydrodynamic loads on them,which cannot be reproduced by the 2D model alone.

关键词： hydrodynamic loads three-dimensional model 2D/3D hybrid model moored ship