机构

• 长春光学精密机械与物... [1]
• 国家天文台 [1]
• 海洋研究所 [1]
• 合肥物质科学研究院 [1]

采集方式

• OAI收割 [4]

内容类型

• 期刊论文 [3]
• 会议论文 [1]

发表日期

• 2024 [1]
• 2022 [1]
• 2020 [1]
• 2006 [1]

学科主题

筛选

浏览/检索结果: 共4条，第1-4条 帮助 条数/页： 5101520253035404550556065707580859095100 排序方式： 请选择题名升序题名降序提交时间升序提交时间降序作者升序作者降序发表日期升序发表日期降序 Variation in the Quanta-to-Energy Ratio of Photosynthetically Active Radiation under the Cloudless Atmosphere 期刊论文  OAI收割 ATMOSPHERE, 2024, 卷号: 15, 期号: 10, 页码: 18 作者:  Wang, Weibo;  Cai, Shangzhan;  Huang, Jiang;  Ding, Rui;  Chen, Lei   |  收藏  |  浏览/下载：2/0  |  提交时间：2024/12/20 principal wavelength  quanta-to-energy ratio  photosynthetically active radiation  cloudless atmosphere  SPCTRAL2   A new method for detecting mixed bacteria based on multi-wavelength transmission spectroscopy technology 期刊论文  OAI收割 SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, 2022, 卷号: 270 作者:  Feng, Chun;  Zhao, Nanjing;  Yin, Gaofang;  Gan, Tingting;  Yang, Ruifang   |  收藏  |  浏览/下载：68/0  |  提交时间：2022/03/21 Spectral separation  Bacteria  Monte carlo  Principal component analysis  Backpropagation neural networks  Multi-wavelength transmission spectrum   Rare Object Search From Low-S/N Stellar Spectra in SDSS 期刊论文  OAI收割 IEEE ACCESS, 2020, 卷号: 8, 页码: 66475-66488 作者:  Wu, Minglei;  Pan, Jingchang;  Yi, Zhenping;  Wei, Peng   |  收藏  |  浏览/下载：13/0  |  提交时间：2021/12/06 Principal component analysis  Search problems  Astronomy  Support vector machines  Wavelength division multiplexing  Feature extraction  Random forests  SDSS  stellar spectra  machine learning  rare object search   Support technique of ultra thin mirror in space optics (EI CONFERENCE) 会议论文  OAI收割 2nd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, November 2, 2005 - November 5, 2005, Xian, China 作者:  Ren J.-Y.;  Gao M.-H. 收藏  |  浏览/下载：30/0  |  提交时间：2013/03/25 With the development of space optical system  the technique of ultra thin mirror come forth and is paid more attention because of less difficulty in machining  low cost  lightweight  no disassembly during detecting and maintaining. The key technique takes advantage of deformation of ultra thin mirror as the influence of environment to adjust the surface figure. Its accuracy meets requirement. An analysis method is based on finite element analysis (FEA)  and many items  including the amount of support points  the way of arrangement  the optimum design of support component are studied. The finite element method was used to analyze the mirror and some different mirror support schemes. The principal aim of the mirror analysis is to get numbers of support points and the ways of the support. There are three schemes including 12-6-1  12-8-1 and 16-8-1 models. Deformation of deadweight is calculated under the three conditions. The way of 16-8-1 is more suitable than the designs of other two. The support subassembly is amended to meet with the mirror surface RMS in the range of 30m. Deformation of the mirror with support structure has been calculated. The result is 16.52nm  lower than a quarter of the wavelength  which indicates the feasibility of the support scheme applied to mirror. Theoretical result for the best way of support is presented. The result of analysis shows that requirement surface figure could be met through adjusting support points. It predicts feasibility of the support technique and provides theoretical value for active adjustment in the laboratory. At present  support and adjusting experiment of ultra thin mirror is being carried on.