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浏览/检索结果: 共18条，第1-10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 Adaptive scale model reconstruction for radio synthesis imaging 期刊论文  OAI收割 Research in Astronomy and Astrophysics, 2021, 卷号: 21, 期号: 3, 页码: 63 作者:  Zhang, L.;  Mi, L. G.;  Xu, L.;  Zhang, M.;  Li, D. Y.   |  收藏  |  浏览/下载：38/0  |  提交时间：2022/06/30 methods  data analysis  techniques  image processing  techniques  interferometric  clean deconvolution  efficient implementation  algorithm  Astronomy & Astrophysics   Mode conversion and coupling in a slanted grating 期刊论文  OAI收割 opt. lett., 2014, 卷号: 39, 期号: 7, 页码: 1976 作者:  Li, Shubin;  Zhou, Changhe;  Cao, Hongchao;  Wu, Jun;  Yu, Junjie 收藏  |  浏览/下载：31/0  |  提交时间：2016/11/28 SURFACE-RELIEF GRATINGS  EFFICIENT IMPLEMENTATION  LAMELLAR GRATINGS  TM POLARIZATION  BINARY GRATINGS  WAVE METHOD  DIFFRACTION  DESIGN  OPTIMIZATION  FABRICATION   Mode conversion and coupling in a slanted grating 期刊论文  OAI收割 opt. lett., 2014, 卷号: 39, 期号: 7, 页码: 1976 作者:  Li, Shubin;  Zhou, Changhe;  Cao, Hongchao;  Wu, Jun;  Yu, Junjie 收藏  |  浏览/下载：23/0  |  提交时间：2016/11/28 SURFACE-RELIEF GRATINGS  EFFICIENT IMPLEMENTATION  LAMELLAR GRATINGS  TM POLARIZATION  BINARY GRATINGS  WAVE METHOD  DIFFRACTION  DESIGN  OPTIMIZATION  FABRICATION   Reentry guidance based on parametric optimization (EI CONFERENCE) 会议论文  OAI收割 2012 International Conference on Mechatronics and Control Engineering, ICMCE 2012, November 29, 2012 - November 30, 2012, Guangzhou, China 作者:  Li D. 收藏  |  浏览/下载：159/0  |  提交时间：2013/03/25 This paper presents a parametric optimization approach to solve reentry guidance. Due to the various constraints imposed on the trajectory  original guidance problem can be converted into an optimal control problem with a merit function to be minimized. Direct implementation of method of variation and is too complex to get a reasonable result  while a numerical parametric optimization approach is feasible and efficient if we choose appropriate control variables as the optimization parameters and effective optimization algorithm. A simulation of the approach is performed to show its validity on reentry guidance problem: as the value of merit function converges to acceptable threshold  all constraints are hold. (2013) Trans Tech Publications  Switzerland.   E-CUSP scheme for the equations of ideal magnetohydrodynamics with high order WENO Scheme 期刊论文  OAI收割 JOURNAL OF COMPUTATIONAL PHYSICS, 2012, 卷号: 231, 期号: 19, 页码: 6233-6247 作者:  Shen YQ(申义庆);  Zha GC;  Huerta MA 收藏  |  浏览/下载：34/0  |  提交时间：2013/01/18 Hypersonic  MHD  Shocks  Approximate Riemann Solver  Constrained Transport Method  Flux-Splitting Scheme  Upwind Scheme  Godunov Method  Efficient Implementation  Flows  Construction  Systems   Density functional study on chirospectra of bruguierols 期刊论文  OAI收割 Acta Physica Sinica, 2011, 卷号: 60, 期号: 4 C. Y. Mang; G. Z. Gou; C. P. Liu; K. C. Wu 收藏  |  浏览/下载：30/0  |  提交时间：2012/06/06 bruguierol  optical activity  density functional theory  circular  dichroism  vibrational circular-dichroism  molecular-orbital methods  gaussian-type  basis  absolute-configuration  organic-molecules  efficient  implementation  excitation-energies  basis sets  approximation  continuum   An Adaptive Multimoment Global Model on a Cubed Sphere 期刊论文  OAI收割 Monthly Weather Review, 2011, 卷号: 139, 期号: 2, 页码: 523-548 作者:  Chen CG(陈春刚);  Xiao F(肖锋);  Li XL 收藏  |  浏览/下载：28/0  |  提交时间：2012/04/01 Shallow-Water Equations  Finite-Volume Method  Barotropic Vorticity Equation  Mesh Refinement  Efficient Implementation  Incompressible Flows  Unified Formulation  Weather Prediction  Conservation-Laws  Grid Refinement   A 5th order monotonicity-preserving upwind compact difference scheme 期刊论文  OAI收割 Science China, Physics, Mechanics & Astronomy, 2011, 卷号: 54, 期号: 3, 页码: 511-522 作者:  He ZW(何志伟);  Li XL(李新亮);  Fu DX(傅德薰);  Ma YW(马延文) 收藏  |  浏览/下载：54/0  |  提交时间：2012/04/01 Upwind Compact Scheme  Monotonicity-Preserving  Compressible Flows  Shock Capturing Scheme  Hyperbolic Conservation-Laws  Essentially Nonoscillatory Schemes  Shock-Turbulence Interaction  High-Resolution Schemes  High-Order  Efficient Implementation  Flow   Optimal multiresolution dynamic models generation based on triangle importance (EI CONFERENCE) 会议论文  OAI收割 2nd International Conference on Image Analysis and Signal Processing, IASP'2010, April 12, 2010 - April 14, 2010, Xiamen, China 作者:  Zhao J.;  Zhang S. 收藏  |  浏览/下载：19/0  |  提交时间：2013/03/25 In this paper  we propose an efficient method to generate optimal multiresolution dynamic models. By the method  we define the triangle importance degree as a weight parameter to be embedded to the edge contraction cost  so the new metric can not only measure distance error but also reflect geometric variation of local areas. A deformation degree weight is appended to the aggregated edge contraction cost for the whole animation  thus sharp features on areas with large deformation can be preserved. In addition  a process of mesh optimization and validity check can further alleviate the geometric distortion of the approximations. Our approach is efficient in operation  easy for implementation  and as a result high quality of dynamic approximations with well-preserved fine details can be generated at any given frame. 2010 IEEE.   Fast color-transfer-based image fusion method for merging infrared and visible images (EI CONFERENCE) 会议论文  OAI收割 Multisensor, Multisource Information Fusion: Architectures, Algorithms, and Applications 2010, April 7, 2010 - April 8, 2010, Orlando, FL, United states 作者:  Xu S. 收藏  |  浏览/下载：24/0  |  提交时间：2013/03/25 We present a computationally efficient color image fusion algorithm for merging infrared and visible images. At the core of the proposed method is the color transfer technique based on the linear YCBCR space. The method directly uses the grayscale fused image and the difference signals of the input images to construct the source YCBCR components  then uses the statistical color transfer technique to form a color fused image that takes the target image's color characteristics. Two different strategies  which respectively employ the pixel averaging fusion scheme and the multiresolution fusion scheme as the grayscale image fusion solution  are proposed to fulfill different user needs. The simple strategy using the pixel averaging fusion scheme answers to a need of easy implementation and speed of use. And the complex strategy using the multiresolution fusion scheme answers to the high quality need of the fused products. In addition  we also describe some useful theories about color-transfer-based image fusion. Experimental results show that the proposed color image fusion algorithm can effectively produce a natural appearing "daytime-like" color fused image  and even using the pixel averaging fusion scheme to implement the grayscale fusion can also provide a pleasing result. 2010 Copyright SPIE - The International Society for Optical Engineering.