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Chinese Academy of Sciences Institutional Repositories Grid
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CAS IR Grid
机构
数学与系统科学研究院 [3]
长春光学精密机械与物... [2]
理论物理研究所 [1]
中国科学院大学 [1]
自动化研究所 [1]
采集方式
OAI收割 [7]
iSwitch采集 [1]
内容类型
期刊论文 [6]
会议论文 [2]
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2023 [1]
2020 [1]
2019 [1]
2015 [1]
2011 [1]
2008 [1]
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学科主题
Physics [1]
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SONC optimization and exact nonnegativity certificates via second-order cone programming
期刊论文
OAI收割
JOURNAL OF SYMBOLIC COMPUTATION, 2023, 卷号: 115, 页码: 346-370
作者:
Magron, Victor
;
Wang, Jie
  |  
收藏
  |  
浏览/下载:24/0
  |  
提交时间:2023/02/07
Sum of nonnegative circuit polynomials
Second -order cone programming
Polynomial optimization
Sum of binomial squares
Rounding -projection algorithm
Exact nonnegativity certificate
A new fast search algorithm for exact k-nearest neighbors based on optimal triangle-inequality-based check strategy
期刊论文
OAI收割
KNOWLEDGE-BASED SYSTEMS, 2020, 卷号: 189, 页码: 11
作者:
Pan, Yiwei
;
Pan, Zhibin
;
Wang, Yikun
;
Wang, Wei
  |  
收藏
  |  
浏览/下载:52/0
  |  
提交时间:2020/03/30
Exact k-nearest neighbors
Fast search algorithm
Clustering
Triangle inequality
Optimal check strategy
Adaptive Exact Penalty Design for Constrained Distributed Optimization
期刊论文
OAI收割
IEEE TRANSACTIONS ON AUTOMATIC CONTROL, 2019, 卷号: 64, 期号: 11, 页码: 4661-4667
作者:
Zhou, Hongbing
;
Zeng, Xianlin
;
Hong, Yiguang
  |  
收藏
  |  
浏览/下载:50/0
  |  
提交时间:2020/05/24
Optimization
Distributed algorithms
Linear programming
Convex functions
Adaptive control
Convergence
Adaptive algorithms
Adaptive algorithm
convex and nondifferentiable function
distributed optimization
exact penalty method
Definition and algorithms for reliable steiner tree problem
期刊论文
iSwitch采集
Journal of systems science & complexity, 2015, 卷号: 28, 期号: 4, 页码: 876-886
作者:
Tang Yaohua
;
Yang Wenguo
;
Guo Tiande
收藏
  |  
浏览/下载:30/0
  |  
提交时间:2019/05/10
Approximation algorithm
Exact algorithm
Reliability
Steiner tree
A message-passing approach to random constraint satisfaction problems with growing domains
期刊论文
OAI收割
JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT, 2011, 期号: *, 页码: P02019
作者:
Zhou, HJ
收藏
  |  
浏览/下载:48/0
  |  
提交时间:2013/05/17
EXACT PHASE-TRANSITIONS
RANDOM K-SAT
SATISFIABILITY
THRESHOLD
ALGORITHM
Two noniterative algorithms for computing posteriors
期刊论文
OAI收割
COMPUTATIONAL STATISTICS, 2008, 卷号: 23, 期号: 3, 页码: 443-453
作者:
Yang, Jun
;
Zou, Guohua
;
Zhao, Yu
  |  
收藏
  |  
浏览/下载:23/0
  |  
提交时间:2018/07/30
Bayesian computation
data augmentation
EM algorithm
inverse Bayes formula
sampling/importance resampling
PMDA-Exact
Lossless wavelet compression on medical image (EI CONFERENCE)
会议论文
OAI收割
4th International Conference on Photonics and Imaging in Biology and Medicine, September 3, 2005 - September 6, 2005, Tianjin, China
作者:
Liu H.
;
Liu H.
;
Liu H.
收藏
  |  
浏览/下载:51/0
  |  
提交时间:2013/03/25
An increasing number of medical imagery is created directly in digital form. Such as Clinical image Archiving and Communication Systems (PACS). as well as telemedicine networks require the storage and transmission of this huge amount of medical image data. Efficient compression of these data is crucial. Several lossless and lossy techniques for the compression of the data have been proposed. Lossless techniques allow exact reconstruction of the original imagery while lossy techniques aim to achieve high compression ratios by allowing some acceptable degradation in the image. Lossless compression does not degrade the image
thus facilitating accurate diagnosis
of course at the expense of higher bit rates
i.e. lower compression ratios. Various methods both for lossy (irreversible) and lossless (reversible) image compression are proposed in the literature. The recent advances in the lossy compression techniques include different methods such as vector quantization
wavelet coding
neural networks
and fractal coding. Although these methods can achieve high compression ratios (of the order 50:1
or even more)
they do not allow reconstructing exactly the original version of the input data. Lossless compression techniques permit the perfect reconstruction of the original image
but the achievable compression ratios are only of the order 2:1
up to 4:1. In our paper
we use a kind of lifting scheme to generate truly loss-less non-linear integer-to-integer wavelet transforms. At the same time
we exploit the coding algorithm producing an embedded code has the property that the bits in the bit stream are generated in order of importance
so that all the low rate codes are included at the beginning of the bit stream. Typically
the encoding process stops when the target bit rate is met. Similarly
the decoder can interrupt the decoding process at any point in the bil stream
and still reconstruct the image. Therefore
a compression scheme generating an embedded code can start sending over the network the coarser version of the image first
and continues with the progressive transmission of the refinement details. Experimental results show that our method can get a perfect performance in compression ratio and reconstructive image.
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:33/0
  |  
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.