中国科学院机构知识库网格系统: 检索

Self-Focusing Property of Partially Coherent Beam With Non-Uniform Correlation Structure in Non-Linear Media 期刊论文 OAI收割
FRONTIERS IN PHYSICS, 2022, 卷号: 9
作者: Lu, Lu; Wang, Zhiqiang; Yu, Jiayi; Qiao, Chunhong; Lin, Rong

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收藏 | 浏览/下载：44/0 | 提交时间：2022/02/21

partially coherent beam non-uniform correlation structure optical coherence coherence radius self-focusing length

Energy harvesting via nonlinear energy sink for whole-spacecraft 期刊论文 OAI收割
SCIENCE CHINA-TECHNOLOGICAL SCIENCES, 2019, 卷号: 62, 期号: 9, 页码: 1483-1491
作者: Zhang YeWei; Lu YanNan; Chen LiQun

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收藏 | 浏览/下载：30/0 | 提交时间：2021/02/02

VIBRATION INTEGRATION COMPOSITES BEAM nonlinear energy sink giant magnetostrictive-piezoelectric material pseudo arc length continuation technique energy harvesting

Stiction of flexural MEMS structures 会议论文 OAI收割
3rd International Conference on Digital Manufacturing and Automation, ICDMA 2012, Guangxi, China, AUG 01-02, 2012
作者: Liu Y; Zhang Y(张吟)

收藏 | 浏览/下载：25/0 | 提交时间：2013/02/26

Adhesion Boundary conditions Composite micromechanics Manufacture Stiction Variational techniques Beam bending Beam deflection Beam length Constraint conditions Contact areas Contact separation Elastic energy External loads Matching condition MEMS-structure Micro-cantilevers Microcantilever beams Principle of virtual work Rayleigh-Ritz methods S shape S-shaped Significant impacts Variational methods

Computer simulation of thermal focal length of laser crystal and thermally-near-unstable resonator 会议论文 OAI收割
2012 9th International Conference on Fuzzy Systems and Knowledge Discovery, FSKD 2012, Chongqing, China, MAY 29-31, 2012
作者: Geng AC(耿爱丛); Li BH; Chen XB; Yang XD; Yang MJ(杨明江)

收藏 | 浏览/下载：19/0 | 提交时间：2013/02/26

Computer simulation Fuzzy systems Lasers Gain medium High beam quality High order mode High output power Laser crystals LD side-pumped ND : YAG lasers Output power Pump power SIMPLE method Theoretical prediction Thermal focal length

Architecture of a silicon strip beam position monitor 期刊论文 iSwitch采集
Journal of instrumentation, 2010, 卷号: 5, 页码: 8
作者: Angstadt, R.; Cooper, W.; Demarteau, M.; Green, J.; Jakubowski, S.

收藏 | 浏览/下载：32/0 | 提交时间：2019/04/23

Beam-line instrumentation (beam position and profile monitors Beam-intensity monitors Bunch length monitors) Analogue electronic circuits Data acquisition circuits Front-end electronics for detector readout

Optical system of golay-3 synthetic aperture telescope of Fizeau style (EI CONFERENCE) 会议论文 OAI收割
2010 3rd International Conference on Advanced Computer Theory and Engineering, ICACTE 2010, August 20, 2010 - August 22, 2010, Chengdu, China
作者: Sun Z.-Y.

收藏 | 浏览/下载：19/0 | 提交时间：2013/03/25

In order to get high resolution the field of view is 4. Analyzed the imaging a optical system of golay-3 synthetic aperture telescope has been designed which adopt Fizeau multi-telescope frame. The angular magnification of sub-aperture is -4 the fill factor is 113. The configuration of light beam combiner is Cassegrain style added a lens. The total focal length is 6000mm the PSF have been improved remarkably and the cut-off frequency of MTF is close to that of full aperture. 2010 IEEE.

Far-field focusing of laser beam based on digital image processing techniques (EI CONFERENCE) 会议论文 OAI收割
Optoelectronic Imaging and Multimedia Technology, October 18, 2010 - October 20, 2010, Beijing, China
作者: Zhao S.; Tian Y.-Z.; Liu L.-S.; Guo J.; Zhang H.-Y.

收藏 | 浏览/下载：27/0 | 提交时间：2013/03/25

In order to lead the laser beam transmit in the atmosphere convergently an experiment of laser focus at the distance of 450m and 300m has been operated in the outdoor place. The actual manipulations are as follows: Firstly the laser was collimated by a beam expander then the near-parallel laser beam was transmitted with a Galileo telescope system and the distance between the concave lens and the convex lens can be tuned through a precise displacement platform so the focus of the system changed due to the tiny displacement of the concave lens. Secondly the average power of the laser spot can be measured using power meter the power is 47.67mW and the standard deviation is 0.67mW while the focal length is 450m. Thirdly the energy distribution was found through the laser beam analyzer. The spot images were saved using the beam analyzer then the saved image can be processed with Matlab software afterwards. The function named EDGE and Sobel operator was used in the pre-processing of the saved image then method of median filter was used in the course of image de-noising and 53H filter was adopted in the signal analysis. The diameter of laser spot was obtained by the method above the diameter is 5.56mm and the standard deviation is 0.24mm. The spot center excursion is 0.56mm it is 10.43% of the total diameter of the laser spot. At last the key factors of the energy dissipation in the focusing system can be summarized as follows: restriction of the diffraction limit attenuation in the atmosphere geometrical aberration of optical system and the diffraction limit and the geometrical aberration are significant in the three factors above so we can reduce the impact of the both factors during the design of optical system. The reliable referenced data of the system design can be acquired through the primary experiment research. 2010 SPIE.

Electro-optical sampling non-synchronous delay scanning measurement of electron beam bunch length at BFEL 期刊论文 OAI收割
CHINESE PHYSICS C, 2010, 卷号: 34, 期号: 2, 页码: #REF!
作者: Sun DR(孙大睿); Xu JQ(徐金强); Chen SY(陈森玉); Sun, DR; Xu, JQ

收藏 | 浏览/下载：55/0 | 提交时间：2016/04/12

electro-optical sampling measurement of electron beam bunch length non-synchronous delay scanning technique

Electro-optical sampling non-synchronous delay scanning measurement of electron beam bunch length at BFEL 期刊论文 OAI收割
中国物理C, 2010, 期号: 2, 页码: 227-230
作者: Sun DR(孙大睿); Xu JQ(徐金强); Chen SY(陈森玉)

收藏 | 浏览/下载：57/0 | 提交时间：2015/12/07

electro-optical sampling measurement of electron beam bunch length non-synchronous delay scanning technique

Measurement of length-scale and solution of cantilever beam in couple stress elasto-plasticity 期刊论文 OAI收割
ACTA MECHANICA SINICA, 2009, 卷号: 25, 期号: 3, 页码: 381-387
作者: Ji Bin; Chen Wanji; Zhao Jie

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收藏 | 浏览/下载：64/0 | 提交时间：2021/02/02

STRAIN GRADIENT PLASTICITY MICRO-INDENTATION LAW Material length-scale Couple stress elasto-plasticity Analytical solution Cantilever beam