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Design of the real-time autofocusing system for collimator with long focus length and large aperture (EI CONFERENCE) 会议论文  OAI收割
2011 International Academic Conference on Numbers, Intelligence, Manufacturing Technology and Machinery Automation, MAMT 2011, December 24, 2011 - December 25, 2011, Wuhan, China
作者:  Zhang X.;  Zhang X.;  Zhang X.
收藏  |  浏览/下载：42/0  |  提交时间：2013/03/25
Large aperture collimator which has been widely used for calibrating and testing various optical devices plays an essential role in correlative laboratories. As being the basic testing and calibration equipment  the large aperture collimator's accuracy should be much higher than the device under testing in order to ensure the accuracy of the measurement. However  the process of adjusting the collimator is extremely complicated due to the collimator's large aperture and long focal length. So it is difficult to ensure the measurement's quality and easy to cause the system being vulnerable to the surrounding environment. One of the most common problems is defocus. In order to solve the problem above  this issue presents a new type of autocollimator autofocusing system which uses pentaprism instead of using large-aperture plane mirror  semiconductor lasers as light source and CCD sensor as receiver. The system is smaller  lighter  and more convenient when using. The computer simulation shows that the autofocusing system's resolution could reach the accuracy of 40m. If we use the relevant algorithms to execute the sub-pixel scanning  the resolution could reach the accuracy of 10m. It shows that the system could satisfy the required testing precision of testing large aperture optical device.  
Image compression algorithm of high-speed SPIHT for aerial applications (EI CONFERENCE) 会议论文  OAI收割
2011 IEEE 3rd International Conference on Communication Software and Networks, ICCSN 2011, May 27, 2011 - May 29, 2011, Xi'an, China
作者:  Zhang K.;  Zhang K.;  Zhang K.;  Zhang K.
收藏  |  浏览/下载：39/0  |  提交时间：2013/03/25
SPIHT and NLS (Not List SPIHT) are efficient compression algorithms  but the algorithms application is limited by the shortcomings of the poor error resistance and slow compression speed in the aviation and other areas requiring high-speed compression. In this paper  the error resilience and the compression speed are improved. The remote sensing images are decomposed by Le Gall5/3 wavelet  and wavelet coefficients are indexed  scanned and allocated by the means of family blocks. The bit-plane importance is predicted by bitwise OR  so the N bit-planes can be encoded at the same time. Compared with the SPIHT algorithm  this modified algorithm is easy implemented by hardware  and the compression speed is improved. The PSNR of reconstructed images encoded by high-speed SPIHT is slightly lower than SPIHT at rate 1bpp  but the speed is 4.5-6 times faster than SPIHT encoding process. The algorithm meets the high speed and reliability requirements of aerial applications. 2011 IEEE.  
Exact soliton solution and inelastic two-soliton collision in a spin chain driven by a time-dependent magnetic field 期刊论文  OAI收割
PHYSICAL REVIEW E, 2003, 卷号: 68, 期号: 3
Li, ZD; Li, L; liu, WM; Liang, JQ; Ziman, T
收藏  |  浏览/下载：13/0  |  提交时间：2013/09/17
Nonlinear magnetization dynamics of the classical ferromagnet with two single-ion anisotropies in an external magnetic field 期刊论文  OAI收割
PHYSICAL REVIEW B, 1999, 卷号: 60, 期号: 18, 页码: 12893-12911
作者:  Zhou, X;  Liu, WM;  Zhang, WS;  Pu, FC;  Liu, WM , Oak Ridge Natl Lab, Div Solid State, POB 2008, Oak Ridge, TN 37831 USA.
  |  收藏  |  浏览/下载：16/0  |  提交时间：2012/08/29
Nonlinear magnetization dynamics of the classical ferromagnet with two single-ion anisotropies in an external magnetic field 期刊论文  OAI收割
PHYSICAL REVIEW B, 1999, 卷号: 60, 期号: 18, 页码: 12893
liu, WM; Zhang, WS; Pu, FC; Zhou, X
收藏  |  浏览/下载：23/0  |  提交时间：2013/09/24
Solitons in a uniaxial anisotropic Heisenberg spin chain with Gilbert damping in an external magnetic field 期刊论文  OAI收割
PHYSICAL REVIEW E, 1997, 卷号: 55, 期号: 2, 页码: 1375-1394
作者:  Huang, NN;  Liu, WM;  Liu, WM , ACAD SINICA, INST THEORET PHYS, POB 2735, BEIJING 100080, PEOPLES R CHINA.;  Wang, XB;  Pu, FC
  |  收藏  |  浏览/下载：14/0  |  提交时间：2012/08/29
Nonlinear dynamics of a continuum Heisenberg spin chain with an anisotropy and an external magnetic field 期刊论文  OAI收割
ZEITSCHRIFT FUR PHYSIK B-CONDENSED MATTER, 1997, 卷号: 103, 期号: 1, 页码: 105-114
作者:  Pu, FC;  Liu, WM;  Yang, SL;  Huang, NN;  Liu, WM , CHINA CTR ADV SCI & TECHNOL, WORLD LAB, POB 8730, BEIJING 100080, PEOPLES R CHINA.
  |  收藏  |  浏览/下载：23/0  |  提交时间：2012/08/29
Nonlinear dynamics of the magnetization in an anisotropic ferromagnet with a magnetic field 期刊论文  OAI收割
PHYSICAL REVIEW E, 1996, 卷号: 54, 期号: 5, 页码: 4612-4625
作者:  Liu, WM;  Wang, XB;  Pu, FC;  Huang, NN;  Liu, WM , CHINESE ACAD SCI,INST THEORET PHYS,POB 2735,BEIJING 100080,PEOPLES R CHINA.
  |  收藏  |  浏览/下载：16/0  |  提交时间：2012/08/29
Nonlinear dynamics of the magnetization in an anisotropic ferromagnet with a magnetic field 期刊论文  OAI收割
PHYSICAL REVIEW E, 1996, 卷号: 54, 期号: 5, 页码: 4612
liu, WM; Wang, XB; Pu, FC; Huang, NN
收藏  |  浏览/下载：24/0  |  提交时间：2013/09/24