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111篇 您的检索式:作者名="Henry LEUNG"
    题名 作者 年代 出处 被引量
1基于小波统计特性的遥感图像像素与特征联合最优融合方法显示文摘遥感影像的IHS融合方法由于匹配误差导致光谱畸变和退化,而小波变换在变换域具有良好的分频特性,小波系数的统计特性反映了遥感影像的边缘、线和区域等显著特征。提出了基于小波统计特性的遥感影像的像素和特征联合最优融合方法,在IHS空间,对强度分量I的高频部分利用多分辨率小波融合方法进行影像的高频细节特征融合,低频部分选取光谱信息和空间分辨率评价指标作为融合权系数求优指标,进行像素级最优融合,实验结果证明了该方法的有效性。肖刚 敬忠良 Henry Leung 王淑 2005遥感学报2005,9,4:14
2Image fusion based on expectation maximization algorithm and steerable pyramid显示文摘In this paper, a novel image fusion method based on the expectation maximization (EM) algorithm andsteerable pyramid is proposed. The registered images are first decomposed by using steerable pyramid.The EM algorithm is used to fuse the image components in the low frequency band. The selection methodinvolving the informative importance measure is applied to those in the high frequency band. The finalfused image is then computed by taking the inverse transform on the composite coefficient representations.Experimental results show that the proposed method outperforms conventional image fusion methods.刘刚 敬忠良 孙韶媛 李建勋 李振华 Henry Leung 2004Chinese Optics Letters2004,2,7:9
3Sequence assembly using next generation sequencing data —challenges and solutions显示文摘Sequence assembling is an important step for bioinformatics study.With the help of next generation sequencing(NGS)technology,high throughput DNA fragment(reads)can be randomly sampled from DNA or RNA molecular sequence.However,as the positions of reads being sampled are unknown,assembling process is required for combining overlapped reads to reconstruct the original DNA or RNA sequence.Compared with traditional Sanger sequencing methods,although the throughput of NGS reads increases,the read length is shorter and the error rate is higher.It introduces several problems in assembling.Moreover,paired-end reads instead of single-end reads can be sampled which contain more information.The existing assemblers cannot fully utilize this information and fails to assemble longer contigs.In this article,we will revisit the major problems of assembling NGS reads on genomic,transcriptomic,metagenomic and metatranscriptomic data.We will also describe our IDBA package for solving these problems.IDBA package has adopted several novel ideas in assembling,including using multiple k,local assembling and progressive depth removal.Compared with existence assemblers,IDBA has better performance on many simulated and real sequencing datasets.CHIN Francis Y.L. LEUNG Henry C.M. YIU S.M. 2014Science China(Life Sciences)2014,57,11:8
4Clinical significance of hepatic derangement in severe acute respiratory syndrome显示文摘AIM: Elevation of alanine aminotransferase (ALT) level is commonly seen among patients suffering from severe acute respiratory syndrome (SARS). We report the progression and clinical significance of liver derangement in a large cohort of SARS patient.METHODS: Serial assay of serum ALT was followed in patients who fulfilled the WHO criteria of SARS. Those with elevated ALT were compared with those with normal liver functions for clinical outcome. Serology for hepatitis B virus (HBV) infection was checked. Adverse outcomes were defined as oxygen desaturation, need of intensive care unit (ICU) and mechanical ventilation and death.RESULTS: Two hundred and ninety-four patients were included in this study. Seventy (24%) patients had elevated serum ALT on admission and 204 (69%) patients had elevated ALT during the subsequent course of illness. Using peak ALT >5×ULN as a cut-off and after adjusting for potential confounding factors, the odds ratio of peak ALT>5x ULN for oxygen desaturation was 3.24 (95%CI 1.23-8.59, P = 0.018), ICU care was 3.70 (95% CI 1.38-9.89, P = 0.009), mechanical ventilation was 6.64 (95%CI 2.22-19.81, P = 0.001) and death was 7.34(95%CI 2.28-24.89, P = 0.001). Ninety-three percent of the survived patients had ALT levels normalized or were on the improving trend during follow-up. Chronic hepatitis B was not associated with worse clinical outcomes.CONCLUSION: Reactive hepatitis is a common complication of SARS-coronavirus infection. Those patients with severe hepatitis had worse clinical outcome.Henry Lik-Yuen Chan Ambrose Chi-Pong Kwan Ka-Fai To Sik-To Lai Paul Kay-Sheung Chan Wai-Keung Leung Nelson Lee Alan Wu Joseph Jao-Yiu Sung 2005World Journal of Gastroenterology2005,11,14:4
5Icteric flare of chronic hepatitis B in a 95-year old patient显示文摘A 95-year old gentleman developed fatal icteric flare of chronic hepatitis B despite lamivudine treatment. This article highlights the atypical presentations of chronic hepatitis B in elderly patient and the need to consider this possibility for acute fulminant hepatitis in endemic areas.WS Wong Wai Keung Leung Henry L Y Chan 2003World Journal of Gastroenterology2003,9,12:3
6Worsening renal function in heart failure: The need for a consensus definition显示文摘Noella J. Sheerin Phillip J. Newton Peter S. Macdonald Dominic Y.C. Leung David Sibbritt Stephen Timothy Spicer Kay Johnson Henry Krum Patricia M. Davidson 2014International Journal of Cardiology2014,,:2
7Accuracy of Risk Scores for Patients With Chronic Hepatitis B Receiving Entecavir Treatment显示文摘Grace Lai–Hung Wong Henry Lik–Yuen Chan Hoi–Yun Chan Pete Chi–Hang Tse Yee–Kit Tse Christy Wing–Hin Mak Stanley King–Yeung Lee Zoe Man–Yi Ip Andrew Ting–Ho Lam Henry Wing–Hang Iu Joyce May–Sum Leung Vincent Wai–Sun Wong 2013Gastroenterology2013,,5:2
8Intrahepatic Hepatitis B Virus Covalently Closed Circular DNA Can Be a Predictor of Sustained Response to Therapy显示文摘Joseph J.Y. Sung May-Ling Wong Scott Bowden Choong-Tsek Liew Alex Y. Hui Vincent W.S. Wong Nancy W.Y. Leung Stephen Locarnini Henry L.Y. Chan 2005Gastroenterology2005,,7:2
9基于混沌调频信号的超宽带穿墙SAR成像显示文摘混沌调频信号具有良好的自相关特性,又类似随机信号,具有较强的抗干扰性能。该文将基于Bernoulli映射的混沌调频信号用于超宽带穿墙雷达成像,建立了信号模型,分析了混沌调频穿墙雷达系统的目标检测性能,分辨能力和抗墙壁多径干扰能力,并与线性调频雷达系统进行了比较。仿真结果表明,与线性调频信号相比,混沌调频信号用于穿墙雷达系统可获得较好的目标检测性能,更好的分辨能力,而且具有抗墙壁多径干扰能力。谭覃燕 Henry Leung 宋耀良 2011电子与信息学报2011,33,2:2
10穿墙SAR成像中的墙体参数误差分析和估计显示文摘穿墙合成孔径雷达(SAR)成像中,图像的质量和可靠性由墙体参数决定。墙体参数估计误差会造成图像散焦和目标位置的偏移。分析了墙体参数估计误差对成像的影响,提出采用乘积型高阶模糊度函数(Product High-order Ambiguity Function,PHAF)算法来估计墙体参数的新方法。仿真结果表明,该方法能获得聚焦的SAR图像和较准确的墙体参数估计值。谭覃燕 Henry Leung 宋耀良 2011电子与信息学报2011,33,3:2
11Liver stiffness-based optimization of hepatocellular carcinoma risk score in patients with chronic hepatitis B显示文摘Grace Lai-Hung Wong Henry Lik-Yuen Chan Catherine Ka-Yan Wong Calvin Leung Candace Yim Chan Patricia Po-Lai Ho Vivian Chi-Yee Chung Zhan Cham-Yan Chan Yee-Kit Tse Angel Mei-Ling Chim Tina Kit-Ting Lau Vincent Wai-Sun Wong 2014Journal of Hepatology2014,,2:2
12A united optimum images fusion based on analysis of color distortion显示文摘In remote sensing community, IHS (intensity, hue, and saturation) transform is one of the most commonly used fusion algorithm. A study on IHS fusion indicates that the color distortion cannot be avoided. Meanwhile, wavelet decomposition has a property of frequency division in transform domain. And the statistical property of wavelet coefficient reflects those significant features. So, a united optimal fusion method, which using the statistical property of wavelet decomposition and IHS transform on pixel and feature levels, is proposed. That is, the high frequency of intensity component I is fused on feature level with multi-resolution wavelet in IHS space, and the low frequency of intensity component I is fused on pixel level with optimal weight coefficients. Spectral information and spatial resolution are two performance indexes of optimal weight coefficients. Experiment results show that it is a practical and effective method.肖刚 敬忠良 李建勋 Henry Leung 2004Chinese Optics Letters2004,2,3:2
13Towards a Theoretical Framework of Autonomous Systems Underpinned by Intelligence and Systems Sciences显示文摘Autonomous systems are an emerging AI technology functioning without human intervention underpinned by the latest advances in intelligence,cognition,computer,and systems sciences.This paper explores the intelligent and mathematical foundations of autonomous systems.It focuses on structural and behavioral properties that constitute the intelligent power of autonomous systems.It explains how system intelligence aggregates from reflexive,imperative,adaptive intelligence to autonomous and cognitive intelligence.A hierarchical intelligence model(HIM)is introduced to elaborate the evolution of human and system intelligence as an inductive process.The properties of system autonomy are formally analyzed towards a wide range of applications in computational intelligence and systems engineering.Emerging paradigms of autonomous systems including brain-inspired systems,cognitive robots,and autonomous knowledge learning systems are described.Advances in autonomous systems will pave a way towards highly intelligent machines for augmenting human capabilities.Yingxu Wang Ming Hou Konstantinos NPlataniotis Sam Kwong Henry Leung Edward Tunstel Imre JRudas Ljiljana Trajkovic 2021IEEE/CAA Journal of Automatica Sinica2021,8,1:2
14Chaotic radar signal processing over the sea显示文摘Henry Leung Titus Lo 1993IEEE journal of oceanic engineering1993,18,3:1
15A study of the transiently chaotic neural network for combinatorial optimization显示文摘Ding Zhen Leung Henry zhu zhiwen 2002Mathematical and Computer Modelling2002,36,910:1
16Viral genotype and hepatitis B virus DNA levels are correlated with histological liver damage in HBeAg-negative chronic hepatitis B virus infection显示文摘Henry Lik-Yuen Chan Steven Woon-Choi Tsang Chook-Tiew Liew Chi-Hang Tse May-Ling Wong Jessica Yuet-Ling Ching Nancy Wai-Yee Leung John Siu-Lun Tam Joseph Jao-Yiu Sung 2002The American Journal of Gastroenterology2002,,2:1
17Model-Set Adaptation Using a Fuzzy Kalman Filter 显示文摘Zhen Ding Henry Leung Keith Chan Zhiwen Zhu 2001Mathematical and Computer Modeling: (S0895-7177)2001,34,78:1
18Small target detection in clutter using recursive nonlinear prediction显示文摘Henry leung 2000IEEE Trans on Aerospace and Electronic Systems2000,36,2:1
19Evaluation of multiple target track initiation techniques in real radar tracking environments显示文摘Henry Leung Hu Zhijian Blanchette Mardn 1996IEE Proceedings on Radar Sonar and Navigation1996,143,4:1
20Dynamical model reconstruction and accurate prediction of power - pool time series显示文摘Vinay Varadan Henry Leung Eloi Bosse 2006IEEE Transactions on Instrunentation and Mea- surement2006,55,1:1
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