Zobrazeno 1 - 10
of 3 010
pro vyhledávání: '"large-aperture"'
Autor:
ABHISHEK DANODIA, N.R. PATEL, SURESH KUMAR, R.P. SINGH, ANURAG SATPATHI, PRAKASH CHAUHAN, A. S. NAIN
Publikováno v:
Journal of Agrometeorology, Vol 26, Iss 3 (2024)
Accurate evapotranspiration (ET) assessment is crucial for agricultural water management, encompassing crop water requirements, irrigation scheduling, water budgeting and drought monitoring. This study integrates remote sensing-based surface energy b
Externí odkaz:
https://doaj.org/article/2869d883108c470f85b2618ad76f0bdc
Publikováno v:
Light: Advanced Manufacturing, Vol 5, Pp 1-9 (2024)
Interferometry with computer-generated holograms (CGHs) is a unique solution for the highly accurate testing of large-aperture aspheric mirrors. However, no direct testing method for quantifying the measurement accuracy of CGHs has been developed. In
Externí odkaz:
https://doaj.org/article/eb0ba64c46154464b367fb59c9632e39
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 11 (2024)
Glass-metal hetero-bonding through optical epoxy adhesive is frequently used in opto-mechanics and requires high stability. However, the bonding stability is difficult to achieve and predict in massive use cases, where dozens to thousands of metal pa
Externí odkaz:
https://doaj.org/article/7bfb84604f104539b9a2cd1558a3d213
Publikováno v:
EAI Endorsed Transactions on Industrial Networks and Intelligent Systems, Vol 11, Iss 3 (2024)
This paper aims to develop a distributed channel estimation (CE) algorithm for spatially non-stationary (SNS) channels in extremely large aperture array systems, addressing the issues of high communication cost and computational complexity associated
Externí odkaz:
https://doaj.org/article/c50fafd2021d4e17a6c88888c28077cb
Autor:
Yingli Ha, Yu Luo, Mingbo Pu, Fei Zhang, Qiong He, Jinjin Jin, Mingfeng Xu, Yinghui Guo, Xiaogang Li, Xiong Li, Xiaoliang Ma, Xiangang Luo
Publikováno v:
Opto-Electronic Advances, Vol 6, Iss 11, Pp 1-11 (2023)
Metalenses have gained significant attention and have been widely utilized in optical systems for focusing and imaging, owing to their lightweight, high-integration, and exceptional-flexibility capabilities. Traditional design methods neglect the cou
Externí odkaz:
https://doaj.org/article/a912527ec4934210a7cdceade32b0b81
Publikováno v:
Machines, Vol 12, Iss 7, p 448 (2024)
Pointing accuracy is a crucial performance index for a fully steerable large-aperture radio telescope and is subject to external and internal disturbances. Improvement of the antenna’s servo control performance is meaningful for pointing, especiall
Externí odkaz:
https://doaj.org/article/a028f6dd4d0d4f8b9945a0b3951dc48c
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 10 (2023)
To comprehensively analyze the jitter error in large-aperture optical telescopes, this paper introduces normalized point source sensitivity (PSSn) to evaluate the telescope system. First, the concept and basic properties of PSSn were introduced, and
Externí odkaz:
https://doaj.org/article/3e170c37d0bf4163b59b7751ce7dcf62
Autor:
Cheng Guo, Zhishuai Zheng, Ziang Liu, Zilong Yan, Yucheng Wang, Ruotong Chen, Zhuonan Liu, Peiquan Yu, Weihao Wan, Qing Zhao, Xiaoping Huang
Publikováno v:
Nanomaterials, Vol 14, Iss 6, p 513 (2024)
The resolving power of metalens telescopes rely on their aperture size. Flat telescopes are advancing with the research on super-resolution confocal metalenses with large aperture. However, the aperture sizes of metalenses are usually bound within hu
Externí odkaz:
https://doaj.org/article/65a4c13d5b6d459cb9400fbcbae61ae2
Autor:
Tianyu Gao, Gaofei Sun, Guoyu Zhang, Zongyu Du, Qiang Liu, Qian Deng, Siwen Chen, Jierui Zhang
Publikováno v:
Applied Sciences, Vol 14, Iss 5, p 1926 (2024)
This study proposes a parabolic off-axis reflective optical system design method to reduce the wave aberration of the optical system of a large aperture single star simulator and improve the optical system’s imaging quality. Firstly, we determined
Externí odkaz:
https://doaj.org/article/72a5902a89024d18b6747d07843103d0