中国科学院机构知识库网格系统: 检索

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	Astronomical observation by 2-meter telescope based on liquid crystal adaptive optics with phase diversity 期刊论文 OAI收割 Optics Communications, 2019, 卷号: 439, 页码: 129-132 作者: D.S.Wu; C.L.Yang; H.Li; P.G.Zhang; X.Y.Zhang \| 收藏 \| 浏览/下载：24/0 \| 提交时间：2020/08/24 Phase diversity,Image restoration,Liquid crystal,Adaptive optics,reconstruction,aberrations,system,Optics
	Defocused spatial diversity technology with aperture scanning for aberration detection and image restoration in aberrated imaging systems 期刊论文 OAI收割 Optical Engineering, 2018, 卷号: 57, 期号: 8, 页码: 083108 作者: Dong, Li; Ma, Haotong; Peng, Qi; Ren, Ge; Qi, Bo \| 收藏 \| 浏览/下载：41/0 \| 提交时间：2019/08/23 Aberrations Gradient methods Image reconstruction Image resolution Phase measurement Restoration Scanning Stochastic systems
	Phase diversity technique with sparse regularization in liquid crystal adaptive optics system 期刊论文 OAI收割 Journal of Astronomical Telescopes Instruments and Systems, 2018, 卷号: 4, 期号: 4, 页码: 8 作者: Wu, D. S.; Yang, C. L.; Zhang, P. G.; Xu, Z. H.; Xu, H. Y. \| 收藏 \| 浏览/下载：16/0 \| 提交时间：2019/09/17 phase diversity sparse regularization image restoration liquid crystal adaptive optics image-restoration aberrations Engineering Instruments & Instrumentation Optics
	Redundancy computation analysis and implementation of phase diversity based on GPU 期刊论文 OAI收割 OPTICAL REVIEW, 2015, 卷号: 22, 期号: 5, 页码: 741-752 作者: Zhang, Quan; Bao, Hua; Rao, Changhui; Peng, Zhenming 收藏 \| 浏览/下载：28/0 \| 提交时间：2015/12/04 Phase diversity Adaptive optics Wavefront sensing Image restoration Parallel computing
	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：26/0 \| 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.
	A new SQP-filter method for solving nonlinear programming problems 期刊论文 OAI收割 JOURNAL OF COMPUTATIONAL MATHEMATICS, 2006, 卷号: 24, 期号: 5, 页码: 609-634 作者: Duoquan Li \| 收藏 \| 浏览/下载：13/0 \| 提交时间：2018/07/30 nonlinear programming sequential quadratic programming filter restoration phase Maratos affects global convergence multi-objective optimization quadratic programming subproblem
	Particle density in zero temperature symmetry restoring phase transitions in four-fermion interaction models 期刊论文 iSwitch采集 Communications in theoretical physics, 2004, 卷号: 41, 期号: 2, 页码: 247-251 作者: Zhou, BR 收藏 \| 浏览/下载：33/0 \| 提交时间：2019/05/10 Gross-neveu and nambu-jona-lasinio models Symmetry restoration at zero temperature and high density Particle number density First- and second-order phase transitions