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香港地钱抗菌化学成分研究

天然产物研究与开发 2001年第5期13卷 15-17页

作者：夏萍芳李仲辉 May-Ling So wing-Hong Chan Wai-yeung Wong 四川教育学院化学系成都610041 香港浸会大学生物系香港浸会大学化学系

利用生物活性试验和1HNMR追踪 ,从香港地钱 (MarchantiapaleaceaBertol)的乙醇提取物中简单快速分离具有抗菌活性的三个已知芳香化合物 :2 羟基 3,7 二甲氧基菲 (1) ,marchantinC(2 )和isoriccardinC(3)。化合物 (1)

关键词：地钱生物活性成分 2-羟基3,7-二甲氧基菲环状二联苄衍生物抗菌作用香港苔分离

Attitudes of visitors at adult intensive care unit toward organ donation and organ support

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Chinese Medical Journal 2019年第3期132卷 373-376页

作者： Nga-wing Tsai Yee-Man Leung Pauline yeung Ng Ting Liong Sui-Fong Lee Chun-Wai Ngai Wai-Ching Sin Jenny Koo Wai-Ming Chan Adult Intensive Care Unit Queen Mary HospitalHong Kong 999077China Intensive Care Unit United Christian HospitalHong Kong 999077China Intensive Care Unit Kwong Wah HospitalHong Kong 999077China Central Nursing Department Queen Mary HospitalHong Kong 999077China

The concept of brain death was 1st introduced in the 1960s, providing an essential conceptual change to medical practice,[1] and its diagnosis is based on demonstrating the complete, irreversible cessation of brainste... 详细信息

关键词： brain death toward organ donation organ support

Multiple hierarchy risk assessment with hybrid model for safety enhancing of unmanned subscale BWB demonstrator flight test

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Chinese Journal of Aeronautics 2019年第12期32卷 2612-2626页

作者： Yi LU Shuguang ZHANG Zejing ZHANG Xuan ZHANG Peng TANG shan FU Department of Automation School of Electronic Information and Electrical EngineeringShanghai Jiao Tong UniversityShanghai 200240China School of Transportation Science and Engineering Beihang UniversityBeijing 100083China Airworthiness Technologies Research and Management Center China Aviation Polytechnology EstablishmentBeijing 100028China China Electronic Product Reliability and Environmental Testing Research Institute Guangzhou 510610China School of Energy and Power Engineering Beihang UniversityBeijing 100083China

To explore the low-speed characteristics of the Blended-wing-Body(BWB)configuration for future civil aircraft,a series of unmanned subscale demonstrators have been developed and tested by our research *** this process,specific safety risks deriving from uncertain design features,system unreliability,and insufficient personnel experience caused continuous flight test mishaps and the risk mechanism was not *** and trial-and-error learning driven safety improvements took few effects on mishap prevention,so our focus was turned to look for systematic safety *** paper establishes a systems theory based hybrid model to integrate the physical system reliability analysis techniques with the system dynamics method for illustrating the multiple risk interactions of the demonstrator flight test involving organizational,human resource and technical system *** the prior BB-5 demonstrator as a case,the hybrid model simulation represents its historical risk evolution process,which verifies the model rational*** risk control strategies reduced the mishap rate of a new demonstrator called BB-6 *** paper also shows the extended hybrid model can be applied on safety management of unmanned aerial vehicles from the initial period of vehicle development.

关键词： Blended-wing-body Demonstration flight test Markov analysis Risk assessment Strategy experiment System dynamics Systems theory

Stationary Classical Chaos of Trapped Two-Component Bose-Einstein Condensates in 1-D Optical Lattice Potentials

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Communications in Theoretical Physics 2007年第7期48卷 125-131页

作者： FANG Jian-Shu LIU wing-Ki ZHU shan-Hua1 Institute of Physics,Hunan University of Technology,Zhuzhou 412008,China2 Department of Physics,Hunan Normal University,Changsha 410081,China3 Department of Physics,University of Waterloo,Waterloo,Ontario,Canada N2L 3G1 Institute of Physics Hunan University of Technology Zhuzhou 412008 China Department of Physics Hunan Normal University Changsha 410081 China Department of Physics University of Waterloo Waterloo Ontario Canada N2L 3G1

We study the nonlinear dynamics of two-component Bose-Einstein condensates in one-dimensional pe-riodic optical lattice *** stationary state perturbation solutions of the coupled two-component nonlinearSchr?dinger/Gross-Pitaevskii equations are constructed by using the direct perturbation *** analysisrevels that the perturbation solution is the chaotic one,which indicates the existence of chaos and chaotic region inparameter *** corresponding numerical calculation results agree well with the analytical *** applying thechaotic perturbation solution,we demonstrate the atomic spatial population and the energy distribution of the systemare chaotic generally.

关键词： stationary state classical chaos two-component Bose-Einstein condensates optical lattice potential

ARCosmetics:a real-time augmented reality cosmetics try-on system

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Frontiers of Computer Science 2023年第4期17卷 15-28页

作者： shan AN Jianye CHEN Zhaoqi ZHU Fangru ZHOU Yuxing YANG Yuqing MA Xianglong LIU Haogang ZHU Tech.&Data Center *** Inc.Beijing 100176China State Key Lab of Software Development Environment Beihang UniversityBeijing 100191China

A virtual cosmetics try-on system provides a realistic try-on experience for consumers and helps them efficiently choose suitable *** this article,we propose a real-time augmented reality virtual cosmetics try-on system for smartphones(ARCosmetics),taking speed,accuracy,and stability into consideration at each step to ensure a better user experience.A novel and very fast face tracking method utilizes the face detection box and the average position of facial landmarks to estimate the faces in continuous frames.A dynamic weight wing loss is introduced to assign a dynamic weight to every landmark by the estimated error during *** balances the attention between small,medium,and large range error and thus increases the accuracy and *** also designed a weighted average method to utilize the information of the adjacent frame for landmark refinement,guaranteeing the stability of the generated *** experiments conducted on a large 106-point facial landmark dataset and the 300-VW dataset demonstrate the superior performance of the proposed method compared to other state-of-the-art *** also conducted user satisfaction studies further to verify the efficiency and effectiveness of our ARCosmetics system.

关键词： facial landmark localization face tracking stabilization augmented reality virtual try-on

壳聚糖与端羧基PLGA接枝共聚物的制备与表征

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暨南大学学报（自然科学与医学版） 2008年第5期29卷 491-494,499页

作者：何山谢德明暨南大学生物医学工程系广东广州510632

壳聚糖与聚乳酸是具有良好生物相容性的高分子材料,已被广泛应用于生物材料,特别是作为组织工程支架.采用三甲基硅烷基(TMS)改性壳聚糖,4-二甲氨基吡啶(DMAP)催化,制备壳聚糖与端羧基PLGA的接枝共聚物.傅立叶变换红外光谱、核磁共振氢... 详细信息

壳聚糖与聚乳酸是具有良好生物相容性的高分子材料,已被广泛应用于生物材料,特别是作为组织工程支架.采用三甲基硅烷基(TMS)改性壳聚糖,4-二甲氨基吡啶(DMAP)催化,制备壳聚糖与端羧基PLGA的接枝共聚物.傅立叶变换红外光谱、核磁共振氢谱证实了共聚物的形成.热分析测试表明,共聚物具有不同于聚乳酸的热特性.接触角测试表明共聚物具有较好的亲水性.壳聚糖与端羧基PLGA的接枝共聚物具有较壳聚糖及聚乳酸更为优良的性能,可作为组织工程支架材料.

关键词：壳聚糖聚乳酸接枝共聚组织工程支架

Identification of coastal wetlands of international importance for waterbirds:a review of China Coastal Waterbird Surveys 2005–2013

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Chinese Birds 2015年第3期6卷 153-168页

作者： Qingquan Bai Jianzhong Chen Zhihong Chen Guotai Dong Jiangtian Dong Wenxiao Dong Vivian wing Kan Fu Yongxiang Han Gang Lu Jing Li Yang Liu Zhi Lin Derong Meng Jonathan Martinez Guanghui Ni Kai shan Renjie Sun Suixing Tian Fengqin Wang Zhiwei Xu Yat-tung Yu Jin Yang Zhidong Yang Lin Zhang Ming Zhang Xiangwu Zeng Forestry Bureau of Dandong Tianjin Birdwatching Society Xiamen Birdwatching Society Shenzhen Birdwatching Society Management Office of Guangdong Neilingding–Futian National Nature Reserve shanghai Huaxia Wildlife Travel Limited The Hong Kong Bird Watching Society Xugou Primary School Kadoorie Conservation China Kadoorie Farm & Botanic Garden Corporation Spoon-billed Sandpipers in China State Key Laboratory of Biocontrol and College of Ecology and Evolution Xiamen Costal Wetlands and Birds Research Center Department of Life Science Cangzhou Normal University 14 bis rue des Temples45240 La FertéSaint AubinFrance Fujian Birdwatching Society Management Office of Yellow River Delta National Nature Reserve Guangxi Mangrove Research Center Tianjin Natural History Museum shanghai Wildbird Society Panjin Birdwatching Society Panjin Maternal and Child Care Service Centre Haifeng Nature Reserve

Background:China's coastal wetlands belong to some of the most threatened ecosystems *** loss and degradation of these wetlands seriously threaten waterbirds that depend on ***:The China Coastal Waterbird Census was organized by volunteer birdwatchers in China's coastal *** were surveyed synchronously once every month at 14 sites,as well as irregularly at a further 18 sites,between September 2005 and December ***:A total of 75 species of waterbirds met the 1 % population level Ramsar listing criterion at least once at one *** number of birds of the following species accounted for over 20 % of the total flyway populations at a single site:Mute Swan(Cygnus olor),Siberia Crane(Grus leucogeranus),Far Eastern Oystercatcher(Haematopus osculans),Bar-tailed Godwit(Limosa lapponica),Spotted Greenshank(Tringa guttifer),Great Knot(Calidris tenuirostris),Spoon-billed Sandpiper(Calidris pygmeus),Saunders' s Gull(Larus saundersi),Relict Gull(Larus relictus),Great Cormorant(Phalacrocorax carbo),Eurasian Spoonbill(Platalea leucorodia),Black-faced Spoonbill(Platalea minor) and Dalmatian Pelican(Pelecanus crispus).A total of 26 sites supported at least one species of which their number met the1 % ***-two species met the 1 % criterion in the Yellow River Delta,shandong;29 at the Cangzhou coast,Hebei and 26 species at the Lianyungang coast,***:The results highlight the international importance of China's coastal wetlands for *** study also demonstrates that participation of local birdwatchers in waterbird surveys results in data that are invaluable not only for understanding the current status of waterbirds in China's coastal regions but also for waterbird conservation and management.

关键词： 1 % criterion Citizen science Coastal wetlands Ramsar site Waterbirds

染料木素和大豆黄素对海马神经细胞H19—7增殖和神经营养因子表达的影响

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中华行为医学与脑科学杂志 2011年第5期20卷 404-406页

作者：潘妹霞 yeung Victor 韩宏裕耿庆山许若军广东省人民医院广东省医学科学院广州510080 香港大学中山大学附属肿瘤医院广东省卫生厅

目的探讨染料木素和大豆黄素对海马神经细胞的活性和增殖作用及其可能机制.方法 H19-7/IGF-IR神经细胞在无酚红无血清DMEM培养液中培养72h后,分别加入一定浓度的染料木素、大豆黄素和雌二醇,用MTT和BrdU法分别检测细胞的活性和增殖,流... 详细信息

目的探讨染料木素和大豆黄素对海马神经细胞的活性和增殖作用及其可能机制.方法 H19-7/IGF-IR神经细胞在无酚红无血清DMEM培养液中培养72h后,分别加入一定浓度的染料木素、大豆黄素和雌二醇,用MTT和BrdU法分别检测细胞的活性和增殖,流式细胞术检测神经细胞周期,ELISA和RT-PCR法检测脑源性神经营养因子（BDNF）的表达.结果处理细胞72h后,与对照组相比,20nM、200 Nm雌激素组H19-7细胞增殖分别提高了33%、36%;20 Nm、200 Nm染料木素组H19-7细胞增殖分别提高了15%、13%;200nM大豆黄素组H19-7细胞增殖分别提高了11%,差异有显著性（P＜0.05）.200nM染料木素和大豆黄素的S期细胞比例[分别为（17.64±0.43）%,（19.48±1.01）%]显著高于对照组（14.21 ± 1.75）%,差异具有显著性（P＜0.05）.染料木素和大豆黄素显著增加海马神经细胞成熟型BDNF水平及其Mrna的表达（P＜0.05）.酪氨酸激酶受体阻断剂K252a能阻断染料木素和大豆黄素的促海马神经细胞增殖作用.结论染料木素和大豆黄素改善海马神经细胞的增殖和活性能力,其作用与促进海马细胞BDNF的表达有关.

关键词：染料木素大豆黄素海马增殖脑源性神经营养因子

Summary of the 2008 Evidence-based Chinese Medicine(EBCM) Workshop

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Chinese Journal of Integrative Medicine 2009年第2期15卷 154-155页

作者：吴大嵘赖世隆杨显荣 Guangzhou University of Traditional Chinese Medicine

The 2008 Evidence-based Chinese Medicine (EBCM) Workshop,jointly organized by the International Society for Chinese Medicine/Editorial Board of Chinese Medicine(Macao) and the Guangdong Provincial Hospital of Chinese ... 详细信息

关键词： Workshop EBCM Summary of the 2008 Evidence-based Chinese Medicine