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1,242 results on '"Chen, Shujun"'

2. Memory-Efficient Optical Flow via Radius-Distribution Orthogonal Cost Volume

Author

Xu, Gangwei, Chen, Shujun, Jia, Hao, Feng, Miaojie, and Yang, Xin

Subjects
Computer Science - Computer Vision and Pattern Recognition
Abstract

The full 4D cost volume in Recurrent All-Pairs Field Transforms (RAFT) or global matching by Transformer achieves impressive performance for optical flow estimation. However, their memory consumption increases quadratically with input resolution, rendering them impractical for high-resolution images. In this paper, we present MeFlow, a novel memory-efficient method for high-resolution optical flow estimation. The key of MeFlow is a recurrent local orthogonal cost volume representation, which decomposes the 2D search space dynamically into two 1D orthogonal spaces, enabling our method to scale effectively to very high-resolution inputs. To preserve essential information in the orthogonal space, we utilize self attention to propagate feature information from the 2D space to the orthogonal space. We further propose a radius-distribution multi-scale lookup strategy to model the correspondences of large displacements at a negligible cost. We verify the efficiency and effectiveness of our method on the challenging Sintel and KITTI benchmarks, and real-world 4K ($2160\!\times\!3840$) images. Our method achieves competitive performance on both Sintel and KITTI benchmarks, while maintaining the highest memory efficiency on high-resolution inputs., Comment: 10 pages, 9 figures

Published
2023

6. Research progress in arc additive manufacturing of high-strength aluminum alloys

Author

WANG Shuwen, CHEN Shujun, ZHAO Qiyue, YUAN Tao, JIANG Xiaoqing, ZHAO Pengjing, SHAN He, and DING Wutong

Subjects
wire arc additive manufacturing, high strength aluminum alloy, metallurgical defects, process optimization, hybrid additive manufacturing, Materials of engineering and construction. Mechanics of materials, TA401-492
Abstract

High-strength aluminum alloy have become one of the most commonly used metal materials for aerospace and automotive application parts due to its high strength， low density， excellent ductility and corrosion resistance. Wire arc additive manufacturing （WAAM） has the ability to rapidly in-situ form and manufacture complex structural parts， and is very suitable for the manufacturing of medium or large high-strength aluminium alloy parts. The current status of high-strength aluminum alloy WAAM processes and equipment， the inherent properties and defects of high-strength aluminum alloy WAAM， and the main performance optimization methods were comprehensively analyzed in this paper. The inherent characteristics of the microstructure and properties as well as the impact of hybrid additive manufacturing technologies on the microstructure and properties were discussed. Opinions are put forward on issues such as metallurgical defects， characteristic performance requirements， the advantages and disadvantages of various optimization processes in WAAM. Development directions such as a comprehensive evaluation system， composition design and wire development， special heat treatment systems and synergy of composite additive manufacturing technology are proposed. Such proposals are expected to provide references for the performance improvement and application promotion of high-strength aluminum alloys manufactured via WAAM.

Published
2024
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9. Study on Corrosion Inhibition Behavior of Photinia Leaf Extracts for Q235 Steel in HCl Medium

Author

CHEN Shujun, TAO Aining, ZHANG Hai, YUAN Longfei, CHEN Siyi, YANG Fang

Subjects
hcl, corrosion inhibition, q235 steel, photinia leaf extract, adsorption model, Materials of engineering and construction. Mechanics of materials, TA401-492, Technology
Abstract

For obtaining environment-friendly and efficient green corrosion inhibitors， the photinia leaf extracts (PTF) were prepared by distilled water reflux method.The corrosion inhibition performance of PTF on Q235 steel in 1 mol/L hydrochloric acid was studied using electrochemical tests， weight loss tests， scanning electron microscopy and other methods.Results showed that as a mixed corrosion inhibitor， PTF could effectively inhibit the corrosion of Q235 steel in hydrochloric acid medium.The corrosion inhibition efficiency increased with the increase of PTF concentration and decreased with the increase of solution temperature.Furthermore， the inhibition efficiency of 4 g/L PTF was 87.99%at 293 K.The results of adsorption isotherm model showed that PTF could spontaneously adsorb on the surface of Q235 steel through physical effects， which conformed to the Langmuir single-layer adsorption model.

Published
2024
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48. Research on Information Sharing Application of Collaborative Government Affairs System Based on Blockchain : Take Social Security Government Affairs as an Example

Author

Chen, Shujun, Tian, Jinpeng, Li, Kan, Editor-in-Chief, Li, Qingyong, Associate Editor, Fournier-Viger, Philippe, Series Editor, Hong, Wei-Chiang, Series Editor, Liang, Xun, Series Editor, Wang, Long, Series Editor, Xu, Xuesong, Series Editor, Luqman, Adeel, editor, Li, Hongbo, editor, and Ali, Ghaffar, editor

Published
2023
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50. SPSS Binary Logistic Regression Was Used to Analyze the Influencing Factors of Contemporary People’s Pension Preference Under Social Support

Author

Chen, Shujun, Zhao, Zizhu, Li, Kan, Editor-in-Chief, Li, Qingyong, Associate Editor, Fournier-Viger, Philippe, Series Editor, Hong, Wei-Chiang, Series Editor, Liang, Xun, Series Editor, Wang, Long, Series Editor, Xu, Xuesong, Series Editor, Luqman, Adeel, editor, Li, Hongbo, editor, and Ali, Ghaffar, editor

Published
2023
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