Xiaoyu Chen

China University of Geosciences

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Guangming Dai

China University of Geosciences

Maocai Wang

China University of Geosciences

Zhiming Song

China University of Geosciences

Gerhard Reinelt

Heidelberg University

Lei Peng

China University of Geosciences

Guangming Dai

Zhejiang University of Science and Technology

Qian Bao

China University of Geosciences

Huanqin Wu

China University of Geosciences

Xin Luo

China University of Geosciences

Mengyun Zhou

China University of Geosciences

Cooperative Institutions

China University of Geosciences

Chinese Academy of Sciences

Shanghai Jiao Tong University

Huazhong University of Science and Technology

University of Chinese Academy of Sciences

Beijing Institute of Technology

Wuhan University

Fudan University

China Academy of Space Technology

Harbin Institute of Technology

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A conflict rainbow DQN based two-stage optimization framework for multiple agile satellites scheduling

IEEE Transactions on Aerospace and Electronic Systems (2025)

Xiaoyu Chen Tian Tian Guangming Dai Maocai Wang Zhiming Song

Rainbow

10.1109/taes.2025.3538476

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A Novel Technique to Compute the Revisit Time of Satellites and Its Application in Remote Sensing Satellite Optimization Design

International Journal of Aerospace Engineering (2017)

Xin Luo Maocai Wang Guangming Dai Xiaoyu Chen

This paper proposes a novel technique to compute the revisit time of satellites within repeat ground tracks. Different from the repeat cycle which only depends on the orbit, the revisit time is relevant to the payload of the satellite as well, such as the tilt angle and swath width. The technique is discussed using the Bezout equation and takes the gravitational second zonal harmonic into consideration. The concept of subcycles is defined in a general way and the general concept of “small” offset is replaced by a multiple of the minimum interval on equator when analyzing the revisit time of remote sensing satellites. This technique requires simple calculations with high efficiency. At last, this technique is used to design remote sensing satellites with desired revisit time and minimum tilt angle. When the side-lap, the range of altitude, and desired revisit time are determined, a lot of orbit solutions which meet the mission requirements will be obtained fast. Among all solutions, designers can quickly find out the optimal orbits. Through various case studies, the calculation technique is successfully demonstrated.

Payload (computing)

Orbit (dynamics)

Ground track

Sun-synchronous orbit

10.1155/2017/6469439

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Citations (35)

Effect of Angle of Attack on Icing of Vertical Axis Wind Turbine Blades

Yang Du Vladimir Ivanovich Velkin Xiaoyu Chen Mohammed A. Qasim

In recent years, more attention has been paid to the research of vertical axis wind turbine blade icing, and this paper investigates the effect of angle of attack of incoming flow velocity on blade icing based on numerical simulation methods. The results show that the wind turbine has the best aerodynamic performance when the angle of attack is near 9°. The maximum icing thickness on the blade surface is positively correlated with the water collection efficiency, and the larger absolute value of the angle of attack, the larger the icing area on the blade surface.

Horizontal axis

10.1109/aced57798.2023.10143482

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A black-box model for predicting difficulty of word puzzle games: a case study of Wordle

Knowledge and Information Systems (2023)

Ling Shi Yingke Chen Jiaxuan Lin Xiaoyu Chen Guangming Dai

Black box

10.1007/s10115-023-01992-6

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Citations (2)

Discrete Potts Model for Generating Superpixels on Noisy Images

arXiv (Cornell University) (2018)

Ruobing Shen Xiaoyu Chen Xiangrui Zheng Gerhard Reinelt

Many computer vision applications, such as object recognition and segmentation, increasingly build on superpixels. However, there have been so far few superpixel algorithms that systematically deal with noisy images. We propose to first decompose the image into equal-sized rectangular patches, which also sets the maximum superpixel size. Within each patch, a Potts model for simultaneous segmentation and denoising is applied, that guarantees connected and non-overlapping superpixels and also produces a denoised image. The corresponding optimization problem is formulated as a mixed integer linear program (MILP), and solved by a commercial solver. Extensive experiments on the BSDS500 dataset images with noises are compared with other state-of-the-art superpixel methods. Our method achieves the best result in terms of a combined score (OP) composed of the under-segmentation error, boundary recall and compactness.

Chiral Potts curve

10.48550/arxiv.1803.07351

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Citations (2)

鉛(II)ハロゲン化物クラスタアニオンのハロゲン置換反応に基づく有機すずブロミドのための蛍光プローブ【Powered by NICT】

Sensors and Actuators B Chemical (2017)

Niu Yufen Xiaoyu Chen Yuan Zhu Shunhua Li

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A dynamic multi-objective optimization algorithm with a dual mechanism based on prediction and archive

Swarm and Evolutionary Computation (2024)

Maocai Wang Bin Li Guangming Dai Zhiming Song Xiaoyu Chen

Optimization algorithm

10.1016/j.swevo.2024.101693

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Analysis of Satellite Constellations for the Continuous Coverage of Ground Regions

Journal of Spacecraft and Rockets (2017)

Guangming Dai Xiaoyu Chen Maocai Wang Elena Fernández Tuan Nam Nguyen

This paper studies the problem of analyzing multisatellite constellations with respect to their coverage capacity of areas on Earth's surface. The geometric configuration of constellation projection points on Earth's surface is investigated. A geometric subdivision approach is described, and the coverage target area belonging to each satellite and its maximum circle radius are defined and calculated. Accordingly, the target area can be decomposed into subregions, and thus the multisatellite coverage problem is decomposed into a one-satellite coverage problem. An accurate and effective solution method is proposed that solves both continuous and discontinuous coverage problems for any type of ground area. In addition, a procedure for calculating satellite orbital parameters is also proposed. The performance of our approach is analyzed using the Globalstar system as an example, and it is shown that it compares favorably with the classical grid-point technique and the longitude method.

Satellite constellation

Orbital inclination

10.2514/1.a33826

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Citations (38)

One image segmentation method acquiring image edge by two thresholds

Journal of Huanggang Normal University (2003)

Xiaoyu Chen

Aiming at the image in which target and background are on the same plane, we offered a new image segmentation method acquiring image edge by two thresholds. Experiments show that we can evaluate image sharpness by the average grads of the image edge acquired by this method and the result is effective.

Image gradient

Range segmentation

Region growing

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Multi-objective optimization of agile satellite orbit design

Advances in Space Research (2018)

Zhiming Song Xiaoyu Chen Xin Luo Maocai Wang Guangming Dai

Ground track

Orbit (dynamics)

Sun-synchronous orbit