中国科学院机构知识库网格系统: 检索

浏览/检索结果: 共4条，第1-4条

帮助

条数/页：排序方式：
	Effects of competition between the anisotropy and the spin quantum number on the magnon energy gap in a four-layer ferromagnetic superlattice 期刊论文 OAI收割 Journal of Magnetism and Magnetic Materials, 2009, 卷号: 321, 期号: 19, 页码: 3031-3037 R. K. Qiu; P. P. Song; Z. D. Zhang 收藏 \| 浏览/下载：25/0 \| 提交时间：2012/04/13 Ferromagnetic superlattice Magnon energy gap Anisotropy Spin quantum number Interlayer exchange coupling Symmetry of the system magnetically structural symmetry layered heisenberg ferrimagnets wave theory interlayer exchange magnetization magnetoresistance multilayers composites dependence magnets
	Effect of anisotropy on the magnon energy gap in a two-layer ferromagnetic superlattice 期刊论文 OAI收割 Physica B-Condensed Matter, 2009, 卷号: 404, 期号: 8-11, 页码: 1295-1300 R. K. Qiu; J. Liang; Q. F. Li; Z. D. Zhang; P. P. Song; X. M. Hong 收藏 \| 浏览/下载：22/0 \| 提交时间：2012/04/13 Ferromagnetic superlattice Magnon energy gap Anisotropy Spin quantum numbers Interlayer exchange couplings Symmetry of the system layered magnetic-structures spin-waves exchange magnetoresistance multilayers composites bilayer
	Quantum competitions between the effects of the interlayer exchange couplings and the magnetically structural symmetry in a four-layer ferrimagnetic superlattice 期刊论文 OAI收割 Journal of Magnetism and Magnetic Materials, 2008, 卷号: 320, 期号: 16, 页码: 2121-2131 R. K. Qiu; Z. D. Zhang; L. Q. Guo 收藏 \| 浏览/下载：15/0 \| 提交时间：2012/04/13 layered ferrimagnetic superlattice interlayer and intralayer exchange coupling sublayer magnetization quantum fluctuation quantum competition magnetically structural symmetry of the system spin-wave spectrum heisenberg ferrimagnets phase-transitions magnetization ferromagnet energy magnetoresistance dependence crystal gap
	Multiwavelet based multispectral image fusion for corona detection (EI CONFERENCE) 会议论文 OAI收割 ICO20: Optical Information Processing, August 21, 2005 - August 26, 2005, Changchun, China 作者: Wang X.; Yang H.-J.; Sui Y.-X.; Yan F.; Yan F. 收藏 \| 浏览/下载：30/0 \| 提交时间：2013/03/25 Image fusion refers to the integration of complementary information provided by various sensors such that the new images are more useful for human or machine perception. Multiwavelet transform has simultaneous orthogonality symmetry compact support and vanishing moment which are not possible with scalar wavelet transform. Multiwavelet analysis can offer more precise image analysis than wavelet multiresolution analysis. In this paper a new image fusion algorithm based on discrete multiwavelet transform (DMWT) to fuse the dual-spectral images generated from the corona detection system is presented. The dual-spectrum detection system is used to detect the corona and indicate its exact location. The system combines a solar-blind UV ICCD with a visible camera where the UV image is useful for detecting UV emission from corona and the visible image shows the position of the corona. The developed fusion algorithm is proposed considering the feature of the UV and visible images adequately. The source images are performed at the pixel level. First a decomposition step is taken with the DMWT. After the decomposition step a pyramid for each source image in each level can be obtained. Then an optimized coefficient fusion rule consisting of activity level measurement coefficient combining and consistency verification is used to acquire the fused coefficients. This process reduces the impulse noise of UV image. Finally a new fused image is obtained by reconstructing the fused coefficients using inverse DMWT. This image fusion algorithm has been applied to process the multispectral UV/visible images. Experimental results show that the proposed method outperforms the discrete wavelet transform based approach.