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CAS IR Grid
机构
金属研究所 [2]
长春光学精密机械与物... [2]
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OAI收割 [4]
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期刊论文 [3]
会议论文 [1]
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2007 [1]
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2002 [1]
1998 [1]
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An investigation of the EPR zero-field splitting of Fe3+ ions at tetragonal sites in Tl2MgF4 and Tl2ZnF4 crystals
期刊论文
OAI收割
Chemical Physics Letters, 2007, 卷号: 438, 期号: 4-6, 页码: 254-258
Z. Y. Jiao
;
X. Y. Kuang
;
S. H. Ma
;
J. H. Li
;
M. L. Duan
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  |  
浏览/下载:15/0
  |  
提交时间:2012/04/13
electron-paramagnetic-resonance
cs2cdf4 crystals
fe-3+ centers
spectra
rb2cdf4
fluorides
rb2znf4
balif3
kznf3
kmgf3
A new spaceborne compression approach for remote sensing imagery (EI CONFERENCE)
会议论文
OAI收割
ICO20: Remote Sensing and Infrared Devices and Systems, August 21, 2005 - August 26, 2005, Changchun, China
作者:
Xu S.
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  |  
浏览/下载:27/0
  |  
提交时间:2013/03/25
After analyzing advantages and disadvantages of these typical encoding methods: SPIHT and VQ
a "DWT+MRLE" approach for spaceborne data compression was proposed in this paper. This approach includes two steps: Discrete Wavelet Transform (DWT) and Modified Run Length Encoding (MRLE). The former used CDF9/7 biorthogonal wavelet filters to powerfully get rid of correlation between pixels in imagery. The later put enlightening information into the lowest bit of some key-position transform coefficients. Consequently
CDF9/7 and MRLE together make hardware platform remain high real-time capability
and help reconstructed images keep good fidelity with PSNR being about 40dB
compared with the original ones. Comparison between experimentations on SPOT4's low-spatial-resolution (10m) imagery and Ikonos2's high-spatial-resolution (1m) imagery
shows this "DWT+MRLE" method having better performance for remote-sensed imagery
especially those of higher resolution. Although inferior to 8:1
Compression Ration (CR) here near 5:1 is greater than France SPOT5's 3:1 and American Ikonos2's 11:2.6 on-board data compression. More important
this method having less computational amount is good for spaceborne capability of real time. The consumed time of different image size is also presented in this paper
based on TI TMSC6416 DSP chip with 600MHz CPU cycle clock.
整数CDF(2,2)双正交小波变换结合SPIHT的无失真图像压缩
期刊论文
OAI收割
计算机工程与应用, 2002, 期号: 04, 页码: 60-61+65
解成俊
;
宋建中
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  |  
浏览/下载:15/0
  |  
提交时间:2013/03/11
无失真图像压缩
CDF(2
2)可逆双正交小波变换
SPIHT
熵编码
Tetragonal distortions of the octahedral environments of Cr3+, Fe3+ and Gd3+ ions in A(2)CdF(4) (A = Rb, Cs) and ACdF(3) crystals
期刊论文
OAI收割
Radiation Effects and Defects in Solids, 1998, 卷号: 145, 期号: 1-2, 页码: 169-178
W. C. Zheng
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  |  
浏览/下载:8/0
  |  
提交时间:2012/04/14
electron paramagnetic resonance
A(2)CdF(4) (A = Rb
local structure
Cs)
crystal-field theory
superposition model
Cr3+
Fe3+
Gd3+
ACdF(3)