中国科学院机构知识库网格系统: 检索

浏览/检索结果: 共4条，第1-4条

帮助

条数/页：排序方式：
	Insight into nitrogen removal performance of anaerobic ammonia oxidation in two reactors: Comparison based on the aspects of extracellular polymeric substances and microbial community 期刊论文 OAI收割 BIOCHEMICAL ENGINEERING JOURNAL, 2022, 卷号: 185, 期号: 0, 页码: 108526 作者: Yang, Dongmin; Jiang, Cancan; Xu, Shengjun; Gu, Likun; Wang, Danhua \| 收藏 \| 浏览/下载：28/0 \| 提交时间：2022/11/09 WASTE-WATER TREATMENT PROCESS START-UP ANAMMOX GRANULES BATCH REACTOR PRODUCTS SMP SLUDGE BACTERIA BIOFILM EPS RELEASE
	Numerical investigation of the axial impulse load during the startup in the shock tunnel 期刊论文 OAI收割 AEROSPACE SCIENCE AND TECHNOLOGY, 2018, 卷号: 73, 页码: 332-342 作者: Meng BQ(孟宝清); Han GL(韩桂来); Luo ZT(罗长童); Jiang ZL(姜宗林) \| 收藏 \| 浏览/下载：60/0 \| 提交时间：2018/10/30 Hypersonic Shock tunnel Start-up process Impulse force Vibration
	a multilevel reputation system for peer-to-peer networks 会议论文 OAI收割 6th International Conferernce on Grid and Cooperative Computing, Urumchi, PEOPLES R CHINA, AUG 16-18, Xu Ziyao; He Yeping; Deng Lingli \| 收藏 \| 浏览/下载：22/0 \| 提交时间：2011/06/29 access control enforcement agent bootstrap process central computation and enforcement agent cold-start problem collusion fair trading problem file authenticity incentive system level keeping reputation computation level up reputation computation load bal
	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.