中国科学院机构知识库网格系统: 检索

Seam Feature Point Acquisition Based on Efficient Convolution Operator and Particle Filter in GMAW 期刊论文 OAI收割
IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS, 2021, 卷号: 17, 期号: 2, 页码: 1220-1230
作者: Fan, Junfeng; Deng, Sai; Ma, Yunkai; Zhou, Chao; Jing, Fengshui

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收藏 | 浏览/下载：58/0 | 提交时间：2021/03/02

Welding Target tracking Vision sensors Feature extraction Cameras Robots Convolution Efficient convolution operator (ECO) particle filter (PF) robot intelligent welding seam feature acquisition structured light vision

Above- and below-ground resource acquisition strategies determine plant species responses to nitrogen enrichment 期刊论文 OAI收割
ANNALS OF BOTANY, 2021, 卷号: 128, 期号: 1, 页码: 31-44
作者: Zhang, Dianye; Peng, Yunfeng; Li, Fei; Yang, Guibiao; Wang, Jun

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收藏 | 浏览/下载：16/0 | 提交时间：2023/02/24

Nitrogen enrichment light acquisition phosphorus acquisition cluster root root exudation community structure

Three-dimensional light field microscope based on a lenslet array 期刊论文 OAI收割
OPTICS COMMUNICATIONS, 2017, 期号: 403, 页码: 133-142
作者: Zhang, Mei; Geng, Zheng; Pei, Renjing; Cao, Xuan; Zhang, Zhaoxing

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收藏 | 浏览/下载：42/0 | 提交时间：2018/03/03

Light Field Three-dimensional Microscopy High Resolution 3d Image Acquisition 3d Image Reconstruction

Design of vibrating wire alignment system for HEPS-TF 期刊论文 OAI收割
HIGH POWER LASER AND PARTICLE BEAMS, 2015, 卷号: 27, 期号: 9, 页码: 95102
作者: Wu L(吴蕾); Wang XL(王小龙); Li CH(李春华); Chen SY(陈素颖); Qu HM(屈化民)

收藏 | 浏览/下载：35/0 | 提交时间：2016/04/18

Alignment technique Alignment tolerance Circuit structures Control and data acquisition systems High energy photons Mechanical structures Synchrotron radiation light source Vibrating wire

三维成像技术及其应用 学位论文 OAI收割
工学博士, 中国科学院自动化研究所: 中国科学院大学, 2013
作者: 李托拓

收藏 | 浏览/下载：360/0 | 提交时间：2015/09/02

计算三维采集计算三维显示光场三维显示基于图像引导的放疗技术 Computational 3D image acquisition Computational 3D display Light field 3D Display Image Guided Radiotherapy

Design and image restoration research of a cubic-phase-plate system (EI CONFERENCE) 会议论文 OAI收割
5th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Advanced Optical Manufacturing Technologies, April 26, 2010 - April 29, 2010, Dalian, China
作者: Zhang J.; Zhang J.; Zhang J.; Shi G.; Zhang X.

收藏 | 浏览/下载：25/0 | 提交时间：2013/03/25

Wave-front coding technology is a novel jointly optical and digital imaging technology which can greatly extend the depth of focus of optical systems. The image restoration process is an important part of wave-front coding technology. Using wave-front coding makes the modulation transfer function(MTF) values of the optical systems change little over a range of several times the depth of focus which means the system MTF is quite insensitive to defocus and there is no zero in the passband. So we can design a single filter for the restoration of images in different defocus positions. However it's hard to avoid noise during image acquisition and transmission processes. These noises will be amplified in the image restoration especially in the high frequency part when the MTF drop is relatively low. The restoration process significantly reduces the system signal to noise ratio this way. Aimed at the problem of noise amplification a new algorithm was proposed which incorporated wavelet denoising into the iterative steps of Lucy-Richardson algorithm. Better restoration results were obtained through the new algorithm effectively solving the noise amplification problem of original LR algorithm. Two sets of identical triplet imaging systems were designed in one of which the cubic-phase-plate was added. Imaging experiments of the manufactured systems were carried and the images of a traditional system and a wave-front coded system before and after decoding were compared. The results show that the designed wave-front coded system can extend the depth of focus by 40 times compared with the traditional system while maintaining the light flux and the image plane resolution. 2010 Copyright SPIE - The International Society for Optical Engineering.

Study on chromaticity balance for LED exposure system (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging 2007 - Laser, Ultraviolet, and Terahertz Technology, September 9, 2007 - September 12, 2007, Beijing, China
作者: Meng Z.; Meng Z.

收藏 | 浏览/下载：17/0 | 提交时间：2013/03/25

A standard white light compounding algorithm based on combination of CCD illumination acquisition with computer control is presented for LEDs. The computer adjust and control the working current of LEDs by using three-color LEDs illumination acquired by CCD camera achieved chromaticity coordinates error between compounded white light and standard white light D65 less than the threshold beforehand setted by this technique then acquiring needed standard white light. Compounded white light meet the chromaticity error demand that is able to be changed at the same time the CCD illumination acquisition system is eliminated. The proposed algorithm improved the light energy utilization efficiency of LED and eliminated the offset of central wavelength and chromaticity coordinates due to work current change of LEDs. Experimental results show that the proposed algorithm achieved lesser chromaticity error uv=0.001 relative to standard white light D65 enhanced chromaticity uniformity of illumination field.

Study on chroma balance based on grating spectrometer for LED (EI CONFERENCE) 会议论文 OAI收割
Light-Emitting Diode Materials and Devices II, November 12, 2007 - November 14, 2007, Beijing, China
作者: Meng Z.; Meng Z.

收藏 | 浏览/下载：23/0 | 提交时间：2013/03/25

A standard white light compounding algorithm based on combination of choma coordinates acquisition system with computer working current control system is presented for three-color LED. The chroma coordinates acquisition system consist of grating spectrometer and integrating sphere. The computer adjust and control the working current of three-color LED then achieved chroma coordinates error between the compounded white light and standard white light D65 until the chroma coordinates is less than the threshold beforehand set by this technique. The compounded white light meet the chroma error demanded that is able to be changed at the same time the chroma coordinates acquisition system and the working current control system are eliminated. The proposed algorithm the offset of central wavelength and the change of chroma coordinates due to working current variety for LEDs. Experimental results show that the proposed algorithm achieved lesser chroma error uv=0.001 relative to standard white light D65 enhanced chroma uniformity of illumination field.

Developing of in-suit long trance profiler for testing slope error of aspherical optical Elements (EI CONFERENCE) 会议论文 OAI收割
ICO20: Optical Devices and Instruments, August 21, 2005 - August 26, 2005, Changchun, China
Zhou C.; Li H.; Chen C.; Zhou C.; Qian S.

收藏 | 浏览/下载：35/0 | 提交时间：2013/03/25

Profile error of super smooth surface of optical elements at X-ray/EUV in synchrotron radiation (SR) light beam line is described as slope error of them generally. The Long Trace Profiler (LPT) is used for testing surface slope error of SR optical elements in world generally. It is requisite to use In-suit LTP measuring surface thermal distortion of SR optical elements with high heat under high bright SR source. Authors design an In-suit LTP by means of co-path interferometer with pencil light beam. The instrument not only can be used for testing slope error of mirrors in Lab. also in situation test the distortion of mirror with high heat load at synchrotron light beam line. The device can be used to test various absolute surface figures of optical elements such as aspherieal spherical and plane. It is needless standard reference surface. It is named by LTP-III. This paper describes its basic operating principle optical system mechanical constructions DC serve motor control system array detector data acquisition system and computer system for controlling and data analysis of LTP-III. The Instrument has advantages of high accuracy low cost multifunction and wide application. Length of surface measured of optical element accuracy is 0.04 arcsec.

Probing the center of activity in a CSS superluminal source 3C138 会议论文 OAI收割
Qingdao, China, August 24, 2004 - August 27, 2004
作者: Shen, Z. Q.; Cai, H. B.; Chen, X.; Shang, L. L.; Jiang, D. R.

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收藏 | 浏览/下载：13/0 | 提交时间：2021/07/02

Light sources Bandwidth Data acquisition Imaging techniques Interferometry Light polarization Spectrum analysis