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Complexity scalable control algorithm for intra coding in H.264 under energy constraints

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High Technology Letters 2010年第3期16卷 274-279页

作者： Gao Xuejun Lam kin man ZhuoLi ShenLansun Signal and Information Processing Laboratory Beijing University of Technology Beijing 100124 P.R. China Centre for Signal Processing Department of Electronic and Information Engineering the Hong Kong Polytechnic University Kowloon Hong Kong P.R. China

In this paper, the complexity of intra coding is first analyzed so as to achieve a weight of complexity measurement for each intra mode. Then, a new complexity scalable control algorithm for intra coding in H. 264 is proposed, based on the rearrangement of the order of candidate modes and an efficient complexity allocation and control （CAAC） scheme at the macroblock （MB） level. The candidate modes of each MB are rearranged according to the local-edge information. Experimental results show that our proposed algorithm can make an appropriate cut-off point of the candidate modes sequence adaptively according to the current energy condition of a mobile device, so as to adjust the complexity at any level while maximizing the video quality, which can prolong the operational lifetime of the battery with minimum degradation in video quality.

关键词： complexity scalable control complexity allocation rearrangement of candidate modes intra coding H. 264 energy constraints

Small Molecule Organic Nanostructures—Fabrication and Properties

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Journal of Materials Science & Technology 2008年第4期24卷 563-568页

作者： A.B.Djurii A.M.C.Ng Kai-Yin CHEUNG man-kin FUNG Wai-kin CHAN Department of Physics University of Hong KongPokfulam RoadHong KongHong Kong SARChina Department of Chemistry University of Hong KongPokfulam RoadHong KongHong Kong SARChina

Organic materials are of great interest for the development of low cost electronic and optoelectronic devices. Although majority of research on organic materials is concerned with synthesis of novel compounds and organic thin films, organic nanostructures are attracting increasing interest in recent years. We briefly review different growth methods of organic nanostructures, which can be roughly divided into vapor deposition methods and self-assembly techniques in solution. Then we highlight some interesting properties of organic nanostructures, as well as possible applications, includinf field emission, electronic and optoelectronic devices.

关键词： Organic nanostructures Self-assembly Vapor deposition

Peripheral corneal ulcer secondary to acquired eyelash trichomegaly following treatment with erlotinib in Asia:a case report

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International Journal of Ophthalmology(English edition) 2023年第3期16卷 468-469页

作者： kin-man Tam Iat-Fan Lai Department of Ophthalmic Center Kiang Wu HospitalMacao 999078China

Dear Editor,Erlotinib is an epidermal growth factor receptor (EGFR)inhibitor used in the treatment of non-small cell lung *** side effects of erlotinib include rash and diarrhea,while eyelash trichomegaly and hair dis... 详细信息

关键词： diarrhea treatment ulcer

Structures of Textile-apparel Supply Chain: Concepts and Cases

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Journal of Donghua University(English Edition) 2005年第2期22卷 130-134页

作者：曹宁张志明 kin man To Chester Keng Po Ng Roger Institute of Textiles and Clothing The Hong Kong Polytechnic University Hong Kong

In recent years, supply chain management （SCM） has been in popularity as a new management philosophy for all industries, including textile and apparel industries. The textile-apparel supply chain is relatively complex because it encompasses many participants such as yarn manufacturers, fabric manufacturers, garment manufacturers and retailers. Although many scholars are engaged in researching SCM in textile and apparel industries, a systematic classification of textile-apparel chain does not exist. The paper proposes three types of textile-apparel chain, nominated vertical integration chain, traditional sourcing chain and 3P-hub （third party as the hub） chain. Different coordinators exist in different types of chain. Three Hong Kong headquartered companies, Esquel Group, TAL Apparel Ltd., and Li ＆ Fang （Trading） Ltd. are used as cases responding to each type of the structures respectively.

关键词： supply chain textile-apparel chain coordinator structure

AN IMAGE MAGNIFICATION ALGORITHM USING THE GVF CONSTRAINT MODEL

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Journal of Electronics(China) 2008年第4期25卷 568-571页

作者： Li Xiaoguang Lam kin-man Shen Lansun Signal and Information Processing Laboratory Beijing University of Technology Beijing 100022 China Centre for Multimedia Signal Processing Department of Electronic and Information Engineering The Hong Kong Polytechnic University Hong Kong China

An image magnification method with a Gradient Vector Flow(GVF)constraint-basedanisotropic diffusion model is proposed in this letter.A Low-Resolution(LR)image is first magnifiedusing bilinear interpolation,and then an iterative image restoration method,with the use of an ani-sotropic diffusion model and a Gaussian moving-average constraint,is applied to the magnified *** estimated GVF of a High-Resolution(HR)image can be used to remove the jagged effect and topreserve the textural structure in the ***,the use of the Gaussian moving-average LRmodel can provide a data fidelity constraint,which renders a magnified image closer to the ideal *** results show that the proposed method can improve the quality of magnifiedimages in terms of both objective and subjective criteria.

关键词： Image magnification Super resolution Anisotropic diffusion Gradient-Vector Flow (GVF)

Determinants of Competitiveness: Observations in China's Textile and Apparel Industries

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China & World Economy 2009年第2期17卷 45-64页

作者： Chi-Keung Lau, kin-man to Zhiming Zhang Jing Chen PhD candidate Institute of Textile and Clothing （ITC） Hong Kong Polytechnic University Hong Kong. Assistant Professor ITC Hong Kong Polytechnic University Hong Kong. Associate Professor ITC Hong Kong Polytechnic University Hong Kong. Research Assistant ITC Hong Kong Polytechnic University Hong Kong.

This paper attempts to explore key determinants of competitiveness in the textile and apparel industries, with special reference to Chinese Mainland. The authors conduct a survey that is designed to use productivity, supply-side and demand-side determinants to measure enterprises＇ competitiveness. The collected survey data is then analyzed using factor analysis to capture the related determining factors indicative of competitiveness at the enterprise level. The findings demonstrate that government policies and related industry infrastructure are the most important determinants of competitiveness in the textile and apparel industries, followed by domestic demand. This suggests that the improvement of industry infrastructure can foster industry performance, and that more resources should be endowed to enhance the domestic business competitiveness of local enterprises. The development of domestic demand will foster the competitiveness of the textile and apparel industries on a more sustainable basis.

关键词： China competitiveness textile and clothing industries

Morphology and strain control of hierarchical cobalt oxide nanowire electrocatalysts via solvent effect

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Nano Research 2020年第11期13卷 3130-3136页

作者： Xiuming Bu Xiongyi Liang kingsley O.Egbo Zebiao Li You Meng Quan Quan Yang Yang Li kin man Yu Chi-man Lawrence Wu Johnny C.Ho Department of Materials Science and Engineering City University of Hong KongKowloonHong Kong SARChina Department of Physics City University of Hong KongKowloonHong KongKowloonHong Kong SARChina State Key Laboratory of Terahertz and Millimeter Waves City University of Hong KongKowloonHong Kong SARChina

Designing highly efficient and low-cost electrocatalysts for oxygen evolution reaction is important for many renewable energy *** particular,strain engineering has been demonstrated as a powerful strategy to enhance the electrochemical performance of catalysts;however,the required complex catalyst preparation process restricts the implementation of strain ***,we report a simple self-template method to prepare hierarchical porous Co_(3)O_(4)nanowires(PNWs)with tunable compressive strain via thermal-oxidation-transformation of easily prepared oxalic acid-cobalt nitrate(Co(NO_(3))_(2))composite *** on the complementary theoretical and experimental studies,the selection of proper solvents in the catalyst preparation is not only vital for the hierarchical structural evolution of Co_(3)O_(4) but also for regulating their compressive surface *** of the rich surface active sites and optimized electronic Co d band centers,the PNWs exhibit the excellent activity and stability for oxygen evolution reaction,delivering a low overpotential of 319 mV at 10 mA·cm^(−2)in 1 M KOH with a mass loading 0.553 mg·cm^(−2),which is even better than the noble metal catalyst of RuO_(2).This work provides a cost-effective example of porous Co_(3)O_(4)nanowire preparation as well as a promising method for modification of surface strain for the enhanced electrochemical performance.

关键词： hierarchical structure morphology control compressive strain solvent effect oxygen evolution reaction

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基于感兴趣区的图像编码与渐进传输

电子学报 2004年第3期32卷 411-415页

作者：卓力沈兰荪 LAM kin-man 北京工业大学信号与信息处理研究室北京100022 Department of Electronic & Information Engineering HongKong Polytechnic University

本文采用一种任意形状的整型或非整型小波变换 ,结合高效的SPIHT(SetPartitioningInHierarchicalTrees)图像编码算法 ,分别实现了任意形状感兴趣区的无损压缩和非感兴趣的有损压缩算法 .另外本文还提出了两种感兴趣区优先编码策略 ,可... 详细信息

本文采用一种任意形状的整型或非整型小波变换 ,结合高效的SPIHT(SetPartitioningInHierarchicalTrees)图像编码算法 ,分别实现了任意形状感兴趣区的无损压缩和非感兴趣的有损压缩算法 .另外本文还提出了两种感兴趣区优先编码策略 ,可以保证在极低的码率下感兴趣区的重建质量远远好于非感兴趣区的重建质量 ,满足用户快速、个性化的浏览需求 .这些方法得到的压缩码流都具有嵌入的特点。

关键词：适形小波编码提升小波 SPHT算法感兴趣区渐进传输图像编码图像传输

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一种基于分形码和模型约束的图像放大算法

电子学报 2006年第3期34卷 433-436页

作者：张晓玲沈兰荪 Lam kin-man 北京工业大学信号与信息处理研究室北京100022 香港理工大学电子与资讯工程系

图像放大技术在众多研究领域中有着重要的应用.本文提出一种基于分形码和模型约束的图像放大算法,分形码能够包含图像的空间信息和图像本身的自相似信息,模型约束能够有效的限制放大引入的误差.我们首先对图像采用多种值域块分割方案计... 详细信息

图像放大技术在众多研究领域中有着重要的应用.本文提出一种基于分形码和模型约束的图像放大算法,分形码能够包含图像的空间信息和图像本身的自相似信息,模型约束能够有效的限制放大引入的误差.我们首先对图像采用多种值域块分割方案计算得到多组分形码,并由此得到多个放大图像,然后对放大图像进行平均,从而降低编码误差,最后采用约束模型对放大图像进行修正.实验结果表明,利用本文的方法可以大大提高放大图像的PSNR.

关键词：图像放大分形编码模型约束