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A practical approach to flow field reconstruction with sparse or incomplete data through physics informed neural network 期刊论文  OAI收割
ACTA MECHANICA SINICA, 2023, 卷号: 39, 期号: 3, 页码: 322302
作者:  
Xu SF(许盛峰);  Sun ZX(孙振旭);  Huang RF(黄仁芳);  Guo DL(郭迪龙);  Yang GW(杨国伟)
  |  收藏  |  浏览/下载:12/0  |  提交时间:2023/04/20
Microstructure, Mineralogical Characterization and the Metallurgical Process Reconstruction of the Zinc Calcine Relics from the Zinc Smelting Site (Qing Dynasty) 期刊论文  OAI收割
MATERIALS, 2021, 卷号: 14, 期号: 8, 页码: 15
作者:  
Xiao, Ya;  Zhou, Wenli;  Mo, Linheng;  Chen, Jianli;  Li, Meiying
  |  收藏  |  浏览/下载:26/0  |  提交时间:2022/07/01
Research and application of spectral reconstruction technology based on periodic structure 会议论文  OAI收割
Xiamen, China, 2020-08-25
作者:  
Liu, Bin;  Wei, Ru Yi;  Shi, Yi Shi;  Shi, Lei;  Zhang, Zai Kun
  |  收藏  |  浏览/下载:42/0  |  提交时间:2020/12/29
Reconstruction of the Plasma Boundary of EAST Tokamak Using Visible Imaging Diagnostics 期刊论文  OAI收割
IEEE TRANSACTIONS ON PLASMA SCIENCE, 2018, 卷号: 46, 期号: 6, 页码: 2162-2169
作者:  
Zhang, Heng;  Xiao, Bingjia;  Luo, Zhengping;  Hang, Qin;  Yang, Jianhua
  |  收藏  |  浏览/下载:67/0  |  提交时间:2019/11/12
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:42/0  |  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.