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Zhenan Li, Tianyu Zhang, Minyi Zhu, Chengyong Li, Bin Li, Xiujuan Lu, Jianhua Wang, Liangquan Jia, Hengnian Qi, Xiaomin Wang and Guangwu Zhao
Seed physical properties are stable and visualized, and believed to be reference indicators for screening high-vigor seeds. However, the detailed relationship between seed vigor and its physical properties is not fully understood in rice. To elucidate th...
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Pu Huang, Hengnian Li, Guangwei Wen and Zhaokui Wang
An adaptive weighted strong tracking unscented Kalman filter is proposed in this paper for long-range relative navigation alongside non-cooperative maneuvering targets. First, an equation for obtaining the relative motion of two bodies is derived, it can...
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Bo Ren, Yu Jiang, Hengnian Li and Chunsheng Jiang
This paper focuses on the existence and control of particular types of orbits around asteroid 4 Vesta, including Sun-synchronous orbits, orbits at the critical inclination, repeating ground-track orbits, and stationary orbits. J2, J3, and J4 terms are co...
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Yongjie Liu, Yu Jiang and Hengnian Li
We investigate the topological types and bifurcations of periodic orbits in the gravitational field of irregular bodies by the well-known two parameter analysis method. Results show that the topological types of periodic orbits are determined by the loca...
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Yongjie Liu, Yu Jiang, Hengnian Li and Hui Zhang
This paper intends to show some special types of orbits around Jupiter based on the mean element theory, including stationary orbits, sun-synchronous orbits, orbits at the critical inclination, and repeating ground track orbits. A gravity model concernin...
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Chunsheng Jiang, Yongjie Liu, Yu Jiang and Hengnian Li
This paper investigates the evolution of orbits around Jupiter and designs a sun-synchronous repeating ground track orbit. In the dynamical models, the leading terms of the Jupiter?s oblateness are J2 and J4 terms. A reasonable range of ground track repe...
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