机构

• 地质与地球物理研究所 [2]
• 数学与系统科学研究院 [2]
• 物理研究所 [1]
• 长春光学精密机械与物... [1]

采集方式

• OAI收割 [6]

内容类型

• 期刊论文 [5]
• 会议论文 [1]

发表日期

• 2023 [1]
• 2020 [1]
• 2010 [1]
• 2009 [1]
• 2008 [1]
• 2005 [1]
• 更多

学科主题

筛选

浏览/检索结果: 共6条，第1-6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 The improvement of sparsity gravity inversion using an adaptive lanczos bidiagonalization method 期刊论文  OAI收割 FRONTIERS IN EARTH SCIENCE, 2023, 卷号: 10, 页码: 16 作者:  Meng, Zhaohai;  Wang, Yanfei;  Li, Jinhui;  Li, Fengting;  Zhang, Zishan   |  收藏  |  浏览/下载：30/0  |  提交时间：2023/03/30 sparsity constraint  gravity inversion  optimization iteration  adaptive lanczos bidiagonalization  projected subspace method   Inexact Newton-type methods based on Lanczos orthonormal method and application for full waveform inversion 期刊论文  OAI收割 Inverse Problems, 2020, 卷号: 36, 期号: 11 作者:  He,Qinglong;  Wang,Yanfei   |  收藏  |  浏览/下载：33/0  |  提交时间：2021/01/08 inexact Newton-type methods  Lanczos orthonormal method  full waveform inversion  Krylov subspace methods  adjoint-state method   Exact diagonalization: the Bose-Hubbard model as an example 期刊论文  OAI收割 EUROPEAN JOURNAL OF PHYSICS, 2010, 卷号: 31, 期号: 3, 页码: 591 Zhang, JM; Dong, RX 收藏  |  浏览/下载：37/0  |  提交时间：2013/09/17 LANCZOS METHOD  LINE   Contrast research on interpolation and subpixel imaging in CCD geometric superresolution reconstruction (EI CONFERENCE) 会议论文  OAI收割 1st Asia Pacific Conference on Postgraduate Research in Microelectronics and Electronics, PrimeAsia 2009, November 19, 2009 - November 21, 2009, Shanghai, China 作者:  Xu Y.-S.;  Yang S.-W. 收藏  |  浏览/下载：24/0  |  提交时间：2013/03/25 In order to enhance the resolution of Charge Coupled Device (CCD) pixel with the pixel dimension and focal length of optical system unchanged  the problem of CCD geometric superresolution is educed. The problem is discussed in terms of software and hardware. In software  the bicubic interpolation is introduced  while in hardware  the subpixel imaging method is utilized. The subpixel imaging method integrates two uniform linear CCDs staggered by half dimension of pixel in one device. In operation  the line frequency is doubled. At last  the collected data is interweaved to synthesize a high resolution image. The two methods  bicubic interpolation and subpixel imaging  are simulated with Matlab7.0.1. The qualitative and quantitative analyses are given. The simulated results of lanczos and cubic spline interpolation methods are given simultaneously to show the performance of interpolation. The simulation result shows that the result images quality becomes better in both methods  but compared with bicubic interpolation method  the synthesized image PSNR gained from sub-pixel imaging is averagely enhanced by 2.1682dB  while the elapsed time is reduced to be about one forth. The subpixel imaging method could significantly mitigate the image blur introduced by undersample. 2009 IEEE.   On inexact Hermitian and skew-Hermitian splitting methods for non-Hermitian positive definite linear systems 期刊论文  OAI收割 LINEAR ALGEBRA AND ITS APPLICATIONS, 2008, 卷号: 428, 期号: 2-3, 页码: 413-440 作者:  Bai, Zhong-Zhi;  Golub, Gene H.;  Ng, Michael K.   |  收藏  |  浏览/下载：25/0  |  提交时间：2018/07/30 Hermitian matrix  skew-Hermitian matrix  inexact iterations  conjugate gradient (CG) method  Lanczos method  conjugate gradient for normal equations (CGNE) method   A new trust region algorithm for image restoration 期刊论文  OAI收割 SCIENCE IN CHINA SERIES A-MATHEMATICS, 2005, 卷号: 48, 期号: 2, 页码: 169-184 作者:  Wen, ZW;  Wang, YF   |  收藏  |  浏览/下载：16/0  |  提交时间：2018/07/30 trust region algorithm  image restoration  Lanczos method  Kronecker matrix-vector product  preconditioning