中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
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浏览/检索结果: 共9条,第1-9条 帮助

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Ferritic-Martensitic Steels in Power Industry: Microstructure, Degradation Mechanism, and Strengthening Methods 期刊论文  OAI收割
STEEL RESEARCH INTERNATIONAL, 2024, 页码: 18
作者:  
Jiang, Hanyang;  Huang, Xin;  Feng, Yihui;  Xiong, Wei;  Jin, Zhenyu
  |  收藏  |  浏览/下载:19/0  |  提交时间:2024/10/08
Research Progress of Desertification and Its Prevention in Mongolia 期刊论文  OAI收割
SUSTAINABILITY, 2021, 卷号: 13, 期号: 12, 页码: 17
作者:  
Liang, Xiya;  Li, Pengfei;  Wang, Juanle;  Chan, Faith Ka Shun;  Togtokh, Chuluun
  |  收藏  |  浏览/下载:29/0  |  提交时间:2021/08/19
Research Progress of Desertification and Its Prevention in Mongolia 期刊论文  OAI收割
SUSTAINABILITY, 2021, 卷号: 13, 期号: 12, 页码: 17
作者:  
Liang, Xiya;  Li, Pengfei;  Wang, Juanle;  Chan, Faith Ka Shun;  Togtokh, Chuluun
  |  收藏  |  浏览/下载:14/0  |  提交时间:2021/08/19
Research Progress of Microplastics in Freshwater Sediments in China 期刊论文  OAI收割
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH, 2020, 页码: 15
作者:  
Zhang, Bin;  Chen, Liang;  Chao, Jinyu;  Yang, Xin;  Wang, Qing
  |  收藏  |  浏览/下载:16/0  |  提交时间:2021/06/21
Monomer composition of chitooligosaccharides obtained by different degradation methods and their effects on immunomodulatory activities 期刊论文  OAI收割
CARBOHYDRATE POLYMERS, 2017, 卷号: 157, 页码: 1288-1297
作者:  
Xing, Ronge;  Liu, Yongliang;  Li, Kecheng;  Yu, Huahua;  Liu, Song
收藏  |  浏览/下载:47/0  |  提交时间:2017/03/22
Environmental Behavior and Toxicological Effects of Polycyclic Musks 期刊论文  OAI收割
PROGRESS IN CHEMISTRY, 2012, 卷号: 24, 期号: 4, 页码: 606-615
Li Zhuona; Zhou Qunfang; Liu Jiyan; Shi Yali; Cai Yaqi; Jiang Guibin
收藏  |  浏览/下载:28/0  |  提交时间:2014/11/04
Restoration of an atmospherically blurred image based on physical model fusion approach (EI CONFERENCE) 会议论文  OAI收割
2010 IEEE 10th International Conference on Signal Processing, ICSP2010, October 24, 2010 - October 28, 2010, Beijing, China
作者:  
Wang Y.;  Li J.;  Li J.;  Li J.
收藏  |  浏览/下载:26/0  |  提交时间:2013/03/25
This paper proposes a new restoration method  only using the single image information  combining atmospheric physical model with fusion techniques to reduce the degradation of the image contrast in bad weather conditions caused by atmospheric aerosols  such as haze and fog. The basic idea of this method is to utilize physics-based model method instead of multisensors to generate a serial of virtual images  and then to fuse those virtual images into a high contrast image based on the wavelet fusion technique. In contrast to previous methods  our restoration technique is not only independent on predicted structure  distributions of scene reflectance  or detailed knowledge about the particular weather condition  but also adapt to the situation without a reference image or images with moving objects captured by a video camera. Experiments on different poorcontrast images demonstrate the availability of the proposed method in case of restoring the atmospherically blurred images. 2010 IEEE.  
Karst rocky desertification information extraction with EO-1 Hyperion data 会议论文  OAI收割
International Conference on Earth Observation Data Processing and Analysis, ICEODPA,, Wuhan, China, December 28, 2008 - December 30,2008
Yue, Yuemin; Wang, Kelin; Zhang, Bing; Jiao, Quanjun; Yu, Yizun
收藏  |  浏览/下载:12/0  |  提交时间:2014/12/07
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:41/0  |  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.