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“一带一路”倡议与香港角色（英文）

前沿科学 2017年第3期11卷 4-9页

作者：刘遵义香港中文大学

"丝绸之路经济带"和"21世纪海上丝绸之路",统称为"一带一路"倡议,是在2013年9月由习近平总书记发起的。这是一个宏伟的十年发展计划,目的是联系和改造亚洲、欧洲、非洲和大洋洲的经济,目标是通过建立一个连接所有国家和地区的贸易、投... 详细信息

"丝绸之路经济带"和"21世纪海上丝绸之路",统称为"一带一路"倡议,是在2013年9月由习近平总书记发起的。这是一个宏伟的十年发展计划,目的是联系和改造亚洲、欧洲、非洲和大洋洲的经济,目标是通过建立一个连接所有国家和地区的贸易、投资和基础设施网络,为联合发展创造一个和平和安全的环境,强调通过文化教育交流和产业合作,培养相互理解和信任。在"一个国家,两种制度"安排下,香港有完整的资本流动的优势,稳定的货币和高效公平的司法制度,是一个理想的"一带一路"基础设施项目融资中心。香港应该确保它始终是企业家和发展"一带一路"国家企业的首选。

关键词： “一带一路” 丝绸之路经济带 21世纪海上丝绸之路香港

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高等教育创新的新机遇

国家教育行政学院学报 2006年第9期 20-23页

作者：刘遵义香港中文大学

人口结构的变化、科学技术的变革以及经济全球化,都对高等教育产生了很大影响,提供了很多新的机遇。这些机遇不仅可以提高我们的效率,同时也可以带来新的创造知识和传播知识的方式方法。

关键词：高等教育人口结构科学技术创新

基于流动安全保障的海域天然气水合物试采技术分析

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中国造船 2019年第A01期60卷 273-281页

作者：安坤 lau lawrence 中海油能源发展股份有限公司工程技术分公司深圳518067

天然气水合物作为清洁高效的替代能源,其商业化开采已提上日程。日本与中国相继对海域天然气水合物进行了试采,试采的主要技术均为降压法和化学药剂注入法。论文基于流动安全保障技术,结合我国南海神狐海域开采的资料,对井下降压加热与... 详细信息

天然气水合物作为清洁高效的替代能源,其商业化开采已提上日程。日本与中国相继对海域天然气水合物进行了试采,试采的主要技术均为降压法和化学药剂注入法。论文基于流动安全保障技术,结合我国南海神狐海域开采的资料,对井下降压加热与气液分离,双泵降压两种试采技术方案进行深入分析,为后续海域天然气水合物商业化开采的设计与生产提供参考和借鉴,对增强可持续发展能力、推进绿色清洁能源发展具有重要意义。

关键词：天然气水合物海域试采流动安全保障降压

Stigmatic exudate in the Annonaceae:Pollinator reward,pollen germination medium or extragynoecial compitum?

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journal of Integrative Plant Biology 2017年第12期59卷 881-894页

作者： jenny Y.Y.lau Chun-Chiu Pang lawrence Ramsden Richard M.K.Saunders School of Biological Sciences the University of Hong KongPokfulam RoadHong KongChina

Although ＂dry-type＂ stigmas are widely re- garded as ancestral in angiosperms, the early-divergent family Annonaceae has copious stigmatic exudate. We evaluate three putative functions for this exudate： as a nutritive reward for pollinators; as a pollen germination medium; and as an extragynoecial compitum that enables pollen tube growth between carpels. Stigmatic exudate is fructose dominated （72.2%）, but with high levels of glucose and sucrose; the dominance of hexose sugars and the diversity of amino acids observed, including many that are essential for insects, support a nutritive role for pollinators. Sugar concentration in pre-receptive flowers is high （28.2%）, falling during the peak period of stigmatic receptivity （17.4%）, and then rising again toward the end of the pistillate phase （32.9%）. Pollen germination was highest in sugar concentrations 〈2%. Sugar concentrations during the peak pistillate phase therefore provide optimal osmolarity for pollen hydration and germination; subsequent changes in sugar concentration during anthesis reinforce protogyny （in which carpels mature before stamens）, enabling the retention of concentrated exudate into the staminate phase as a pollinator food reward without the possibility of pollen germination. Intercarpellary growth of pollen tubes was confirmed： the exudate therefore also functions as a suprastylar extragynoecial compitum, overcoming the limitations of apocarpy.

关键词： Stigmatic exudate in the Annonaceae pollen germination medium or extragynoecial compitum Pollinator reward

Flow behavior and deposition study of pollen-shape carrier particles in an idealized inhalation path model

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Particuology 2010年第1期8卷 51-59页

作者： Meer Saiful Hassan Raymond lau School of Chemical and Biomedical Engineering (SCBE) Nanyang Technological University (NTU)

Pollen-shape （spiked sphere） hydroxyapatite （HA） particles for drug carrier application are studied. The particle shape and size effect on flow characteristics and deposition are assessed. The pollen-shape HA particles are synthesized to have comparable size as typical carrier particles with mean diameter of 30-50 μm and effective density less than 0.3 g/cm^3. The flow behaviors of HA and commonly used lactose （LA） carrier particles are characterized by the Carr＇s compressibility index （CI）. The HA particles have lower CI than the LA particles for the same size range. The flow fields of HA and LA carrier particles are measured in an idealized inhalation path model using particle image velocimetry （PLY） technique. The particle streamlines indicate that a large portion of particles may deposit at the bending section due to inertial impaction and gravitational deposition. The flow field result shows that HA particles give smaller separation regions than the LA particles for the same size range. The pollen-shape HA particles are found to be able to follow the gas flow in the model and minimize undesired deposition. Deposition result confirms the bending section to have the most deposition. Deposition is found to be a function of particle properties. An empirical correlation is derived for the deposition efficiency of the pollen-shape particles as a function of particles Stokes number.

关键词： Aerosol Fluid mechanics Multiphase flow Particle Powder technology Pulmonary drug delivery

The pollen tube clear zone: Clues to the mechanism of polarized growth

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journal of Integrative Plant Biology 2015年第1期57卷 79-92页

作者： Peter K.Hepler lawrence j.Winship Biology Department University of Massachusetts School of Natural Science Hampshire College

Pollen tubes usually exhibit a prominent region at their apex called the ＂clear zone＂ because it lacks light refracting amyloplasts. A robust, long clear zone often associates with fast growing pollen tubes, and thus serves as an indicator of pollen tube health. Nevertheless we do not understand how it arises or how it is maintained. Here we review the structure of the clear zone, and attempt to explain the factors that contribute to its formation. While amyloplasts and vacuolar elements are excluded from the clear zone, virtually all other organelles are present including secretory vesicles, mitochondria, Golgi dictyosomes, and the endoplas-mic reticulum （ER）. Secretory vesicles aggregate into an inverted cone appressed against the apical plasma membrane. ER elements move nearly to the extreme apex, whereas mitochondria and Golgi dictyosomes move less far forward. The cortical actin fringe assumes a central position in the control of clear zone formation and maintenance, given its role in generating cytoplasmic streaming. Other likely factors include the tip-focused calcium gradient, the apical pH gradient, the influx of water, and a host of signaling factors （small G-proteins）. We think that the clear zone is an emergent property that depends on the interaction of several factors crucial for polarized growth.

关键词： Actin endoplasmic reticulum myosin polarized growth pollen tube

Calcium at the Cell Wall-Cytoplast Interface

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journal of Integrative Plant Biology 2010年第2期52卷 147-160页

作者： Peter K.Hepler lawrence j.Winship Department of Biology University of MassachusettsAmherstMA 01003USA School of Natural Science Hampshire CollegeAmherstMA 01002USA

Attention is given to the role of Ca^2＋ at the interface between the cell wall and the cytoplast, especially as seen in pollen tubes. While the cytoplasm directs the synthesis and deposition of the wall, it is less well appreciated that the wall exerts considerable self control and influences activities of the cytoplasm. Ca^2＋ participates as a crucial factor in this two way communication. In the cytoplasm, a [Ca^2＋] above 0.1 μM, regulates myriad processes, including secretion of cell wall components. In the cell wall Ca^2＋ , at 10μM to 10 mM, binds negative charges on pectins and imparts structural rigidity to the wall. The plasma membrane occupies a pivotal position between these two compartments, where selective channels regulate influx of Ca^2＋ , and specific carriers pump the ion back into the wall. In addition we draw attention to different factors, which either respond to the wall or are present in the wall, and usually generate elevated[Ca^2＋ ] in the cytoplasm. These factors include：（i） stretch activated channels; （ii） calmodulin; （iii） annexins; （iv） wall associated kinases; （v） oligogalacturonides; and （vi） extracellular adenosine 5＇-triphosphate. Together they provide evidence for a rich and multifaceted system of communication between the cytoplast and cell wall, with Ca^2＋ as a carrier of information.

关键词： Calcium at the Cell Wall-Cytoplast Interface CNGC

NEW MURID RODENTS FROM THE LATE CENOZOIC OF YUSHE BASIN, SHANXI

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古脊椎动物学报(中英文） 1992年第1期 29-38+87-88页

作者： lawrence j.Flynn Harvard University NY Research Associate American Museum of Natural History and Peabody Museum

As scientific collaborators of the Chinese-American joint project "Neogene Rocks and Faunas, Yushe Basin, Shanxi, PRC", the present authors, with William R. Downs, Northern Arizona University, sampled the Yushe microfauna in the fall of 1987 and 1988. The fossil temains were retrieved by surface collection and by wet-sieving bulk quantities of sediment.

关键词： Yushe Basin Late cenozoic murids new taxa

Co-author Weighting in Bibliometric Methodology and Subfields of a Scientific Discipline

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journal of Data and Information Science 2020年第3期5卷 84-96页

作者： lawrence Smolinsky Aaron j Lercher Department of Mathematics Louisiana State UniversityBaton RougeLA 70803USA Middleton Library Louisiana State UniversityBaton RougeLA 70803USA

Purpose: To give a theoretical framework to measure the relative impact of bibliometric methodology on the subfields of a scientific discipline, and how that impact depends on the method of evaluation used to credit individual scientists with citations and publications. The authors include a study of the discipline of physics to illustrate the method. Indicators are introduced to measure the proportion of a credit space awarded to a subfield or a set of ***/methodology/approach: The theoretical methodology introduces the notion of credit spaces for a discipline. These quantify the total citation or publication credit accumulated by the scientists in the discipline. One can then examine how the credit is divided among the subfields. The design of the physics study uses the American Physical Society print journals to assign subdiscipline classifications to articles and gather citation, publication, and author information. Credit spaces for the collection of Physical Review journal articles are computed as a proxy for ***: There is a substantial difference in the value or impact of a specific subfield depending on the credit system employed to credit individual *** limitations: Subfield classification information is difficult to obtain. In the illustrative physics study, subfields are treated in groups designated by the Physical Review journals. While this collection of articles represents a broad part of the physics literature, it is not all the literature nor a random *** implications: The method of crediting individual scientists has consequences beyond the individual and affects the perceived impact of whole subfields and institutions. Originality/value: The article reveals the consequences of bibliometric methodology on subfields of a disciple by introducing a systematic theoretical framework for measuring the consequences.

关键词： Citation analysis Bibliometrics Research evaluation Co-author