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345 results on '"Xue, Donglin"'

2. HRMOT: Two-Step Association Based Multi-object Tracking in Satellite Videos Enhanced by High-Resolution Feature Fusion

Author

Wu, Yuqi, Zhang, Xiaowen, Liu, Qiaoyuan, Xue, Donglin, Sun, Haijiang, Ren, Jinchang, Goos, Gerhard, Founding Editor, Hartmanis, Juris, Founding Editor, Bertino, Elisa, Editorial Board Member, Gao, Wen, Editorial Board Member, Steffen, Bernhard, Editorial Board Member, Yung, Moti, Editorial Board Member, Ren, Jinchang, editor, Hussain, Amir, editor, Liao, Iman Yi, editor, Chen, Rongjun, editor, Huang, Kaizhu, editor, Zhao, Huimin, editor, Liu, Xiaoyong, editor, Ma, Ping, editor, and Maul, Thomas, editor

Published
2024
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9. HRTracker: Multi-Object Tracking in Satellite Video Enhanced by High-Resolution Feature Fusion and an Adaptive Data Association.

Author

Wu, Yuqi, Liu, Qiaoyuan, Sun, Haijiang, and Xue, Donglin

Subjects
ARTIFICIAL satellite tracking, KALMAN filtering, ADAPTIVE filters, MICROSPACECRAFT, EMERGENCY management
Abstract

Multi-object tracking in satellite videos (SV-MOT) is an important task with many applications, such as traffic monitoring and disaster response. However, the widely studied multi-object tracking (MOT) approaches for general images can rarely be directly introduced into remote sensing scenarios. The main reasons for this can be attributed to the following: (1) the existing MOT approaches would cause a significant rate of missed detection of the small targets in satellite videos; (2) it is difficult for the general MOT approaches to generate complete trajectories in complex satellite scenarios. To address these problems, a novel SV-MOT approach enhanced by high-resolution feature fusion and a two-step association method is proposed. In the high-resolution detection network, a high-resolution feature fusion module is designed to assist detection by maintaining small object features in forward propagation. By utilizing features of different resolutions, the performance of the detection of small targets in satellite videos is improved. Through high-quality detection and the use of an adaptive Kalman filter, the densely packed weak objects can be effectively tracked by associating almost every detection box instead of only the high-score ones. The comprehensive experimental results using the representative satellite video datasets (VISO) demonstrate that the proposed HRTracker with the state-of-the-art (SOTA) methods can achieve competitive performance in terms of the tracking accuracy and the frequency of ID conversion, obtaining a tracking accuracy score of 74.6% and an ID F1 score of 78.9%. [ABSTRACT FROM AUTHOR]

Published
2024
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10. Power Testing of Aspheric Lenses Based on Transmission Phase Deflectometric Method.

Author

Wu, Qiong, Wang, Xiaokun, Zhang, Shuangshuang, Li, Wenhan, Zhao, Yingjing, Zhou, Chengchen, Xue, Donglin, and Zhang, Xuejun

Subjects
OPTICAL apertures, TEST methods, CALIBRATION, WAVEFRONT sensors
Abstract

Traditional methods for testing aspheric optical lenses struggle to achieve point-by-point testing across the full aperture of the lens. To facilitate the full-aperture, high-precision, and rapid testing of aspheric optical lenses, a power testing method of lenses based on the transmission phase deflectometric technique was employed. This method determines the phase deviation of light caused by the lens, thereby fitting the transmission wavefront and quickly detecting the power distribution information of the lens. This paper constructs a power testing model based on the phase deflectometric technique, proposes a calibration method that combines DLT (direct linear transformation) and pinhole models to reduce system errors, and combines phase extraction and wavefront fitting for experimental verification. The experimental results are compared with those obtained from the commercial visual lens mapper (VM-2000). The central errors of spherical power and cylindrical power are 1% and 0.7%, respectively. This provides a reliable method for the full-aperture, high-precision, and rapid testing of aspheric optical lenses. [ABSTRACT FROM AUTHOR]

Published
2024
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20. Implementation and optimization suggestions for ISI items of CPR1000 steam generator

Author

Li Tian, Zeng Qingyue, Pan Guosheng, and Xue Donglin

Subjects
Information technology, T58.5-58.64
Abstract

The implementation logic of different ISI items of steam generator during the refueling outage of the nuclear power plant was studied. Based on the implementation relationship between the implementation window and the main line plan of the refueling outage, some optimization suggestions on the planning, preparation and implementation of relevant items were given, aimed at reducing the inspection time of SG ISI items and reducing the collective dose of the inspectors.

Published
2022
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