中国科学院机构知识库网格系统: 检索

Mechanical properties and failure modes of polypropylene fiber-reinforced foamed concrete subjected to high strain rates and large compressive deformation: effects of fiber content and length 期刊论文 OAI收割
JOURNAL OF SUSTAINABLE CEMENT-BASED MATERIALS, 2024
作者: Chen, Longyang; Li PH(李鹏辉); Guo, Weiguo; Zhang, Dongjian; Wang, Ruifeng

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收藏 | 浏览/下载：7/0 | 提交时间：2024/12/02

Polypropylene fiber foamed concrete high strain rete fiber length fiber content

Low loss and polarization-insensitive coupling length for a terahertz fiber directional coupler with symmetric dual-suspended core structure 期刊论文 OAI收割
Optics Communications, 2021, 卷号: 480
作者: Zhu, Yuan-Feng; Huang, Xu; Ke, Qiang; Liu, Guiqiang; Rao, Chun-Fang

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收藏 | 浏览/下载：79/0 | 提交时间：2020/11/03

Birefringence Coupling length Fiber coupler Transmission loss

Preparation, Properties and Mechanisms of Carbon Fiber/Polymer Composites for Thermal Management Applications 期刊论文 OAI收割
POLYMERS, 2021, 卷号: 13, 期号: 1
作者: Ali, Zulfiqar; Gao, Yuan; Tang, Bo; Wu, Xinfeng; Wang, Ying

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收藏 | 浏览/下载：20/0 | 提交时间：2021/12/01

ELECTROPHORETIC DEPOSITION CONDUCTIVITY ENHANCEMENT MATRIX COMPOSITES SURFACE MODIFICATION FIBER LENGTH TRANSPORT THICKNESS GRAPHENE FIBER/EPOXY IMPROVEMENT

Performance Optimization of Fiber Optic Interferometric Accelerometer Based on Phase Noise Analysis 期刊论文 OAI收割
IEEE SENSORS JOURNAL, 2019, 卷号: 19, 期号: 22, 页码: 10498-10505
作者: Yang, Yue; Wang, Zhongmin; Chang, Tianying; Cheng, Liyao; Yu, Miao

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收藏 | 浏览/下载：30/0 | 提交时间：2020/08/24

Differential phase noise fiber optic accelerometer interference arm length difference Michelson interference modulation depth

Fiber Ring With Long Delay Used as a Cavity Mirror for Narrowing Fiber Laser 期刊论文 OAI收割
ieee photonics technol. lett., 2014, 卷号: 26, 期号: 16, 页码: 1621
作者: Pan, Zhengqing; Ye, Qing; Cai, Haiwen; Qu, Ronghui; Fang, Zujie

收藏 | 浏览/下载：17/0 | 提交时间：2016/11/28

Fiber laser fiber ring fiber Bragg grating effective cavity length

Fiber Ring With Long Delay Used as a Cavity Mirror for Narrowing Fiber Laser 期刊论文 OAI收割
ieee photonics technol. lett., 2014, 卷号: 26, 期号: 16, 页码: 1621
作者: Pan, Zhengqing; Ye, Qing; Cai, Haiwen; Qu, Ronghui; Fang, Zujie

收藏 | 浏览/下载：29/0 | 提交时间：2016/11/28

Fiber laser fiber ring fiber Bragg grating effective cavity length

Systemic optimization of linear cavity Yb-doped double-clad fiber laser 期刊论文 OAI收割
optik, 2013, 卷号: 124, 期号: 9, 页码: 793-797
作者: Liu, Jinglin; Zhao, Chujun; Hu, Huanlong; Shuai, Cijun

收藏 | 浏览/下载：26/0 | 提交时间：2014/09/17

Systemic optimization Optimum fiber length Laser output power

Study on ultra-light secondary baffle for coaxial two-mirror telescope (EI CONFERENCE) 会议论文 OAI收割
2012 9th IEEE International Conference on Mechatronics and Automation, ICMA 2012, August 5, 2012 - August 8, 2012, Chengdu, China
作者: Zhang L.; Zhang L.

收藏 | 浏览/下载：62/0 | 提交时间：2013/03/25

The coaxial two-mirror telescope consists of two mirrors facing each other. Classical two-mirror arrangements are Gregorian and Cassegrain. These systems are usually applied to space telescopes and often have optical baffles to prevent stray light from entering the focal plane. The optical baffles consist of concentric rings suspended between the secondary and the primary mirror. The secondary baffle for a large two-mirror optical system is designed and analyzed in this paper. According to mission of a telescope the structure should have high stiffness and high reliability and light weight. Compared with invar aluminum alloy and titanium alloy carbon fiber composite is currently the best material in terms of weight-to-strength ratio. It also has advantages of high temperature tolerance and low thermal expansion. So carbon fiber composite is chosen as material to meet requirements of the coaxial telescope. In this paper optimization method based on finite element analysis (FEA) is used for design the secondary baffle. Minimum weight of the baffle is chosen as an objective function. Thicknesses of former tube and vanes are chosen as variables. Analysis results show that the designed secondary baffle has maximum diameter of 180mm total length of 120mm and weighs 142g. And its fundamental frequency reaches 651Hz. Therefore the baffle has many advantages such as ultra-light weight high stiffness and dimensional stability etc. The optimization method and the baffle design can be helpful to other coaxial telescopes such as Cassegrain Gregorian and their subdivisions. 2012 IEEE.

Research on lightweight outer baffle for coaxial space camera (EI CONFERENCE) 会议论文 OAI收割
2011 International Conference on Electronic and Mechanical Engineering and Information Technology, EMEIT 2011, August 12, 2011 - August 14, 2011, Harbin, China
作者: Zhang L.; Zhang L.

收藏 | 浏览/下载：17/0 | 提交时间：2013/03/25

Stray light is non-imaging light that reach the optical system imaging plane. The non-imaging light can be received by detector if it is not effectively controlled and stray light which directly irradiates on the detector has great influence on the imaging quality. Stray light can be effectively inhibited if the outer baffle of space camera is designed optimally. Carbon fiber composite material is chosen as main material to meet requirements of a coaxial space optical system. The outer baffle should have advantages such as lightweight high stiffness and dimensional stability etc. Using optimization design tools the lightweight outer baffle is designed. And finite element method is used to check the structure. Development and test results show that the outer baffle with a diameter of 620mm and a total length of 1200mm only weighs 7.3kg. And the baffle's natural frequency reaches 88Hz and it can satisfy the requirements of the space camera. 2011 IEEE.

THEORETICAL AND EXPERIMENTAL STUDY OF POLARIZATION CHARACTERISTICS OF POLARIZATION MAINTAINING FIBER BASED ON WAVELENGTH-SWEEPING MODULATION 期刊论文 OAI收割
microwave and optical technology letters, 2010, 卷号: 52, 期号: 7, 页码: 1466-1469
作者: Duan, Zuo-Liang; Ren, Li-Yong; Zhang, Ya-Ni; Wang, Han-Yi; Yao, Bao-Li

收藏 | 浏览/下载：26/0 | 提交时间：2010/12/07

polarization maintaining fiber birefringence beat length polarization extinction ratio