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Application of EXSRF and artificaial neural networks to provenance studies of the archaeological pottery sherds during Neolithic Age in Gansu Province,China

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兰州大学学报（自然科学版） 2003年第1期39卷 47-53页

作者： MAQing-lin LEUNGPo-lau YANAi-xia HUZhi-de CollegeofChemistryandChemicalEngineering LanzhouUniversityLanzhou730000China DepartmentofPhysicsandMaterialsScience CityUniversityofHongKongKowlooHongKong

EDXRF spectromerty was applied to provenance studies of Neolitic Age(from 6000 BCto 2000 BC)pottery sherds excavated from Gansu Province in north-west China。Major and trace components analysis of te pottery specimen was carried out,and the artificial neural networks has been used to classift the trace com-ponent of these pottery。The results shown that pottery exchange had been existed during 3000 BC in ancient Gansu Province,China。

关键词：新石器时代陶片分类研究甘肃能量色散x荧光光谱人工神经网络产地分析

Improved GaN grown on Si(111) substrate using ammonia flow modulation on SiN_x mask layer by MOCVD

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Science China(Technological Sciences) 2009年第9期52卷 2758-2761页

作者： NG KaiWei lau KeiMay Department of Electrical and Electronic Engineering Hong Kong University of Science & Technology Clear Water BayKowloon Hong Kong China

In this paper,1 μm n-GaN was grown by using varied and fixed ammonia flow (NH3) on SiNx mask layer on Si(111) substrate using metal organic chemical vapor deposition (MOCVD). In-situ optical reflectivity traces of GaN growth show that the three-to two-dimensional process has been prolonged by using varied ammonia flow on SiNx mask layer method compared with that grown by fixing ammonia flow. Structural and optical properties were characterized by high-resolution X-ray diffraction and photolu-minescence,and compared with the sample grown by fixing ammonia flow,GaN grown using the varied ammonia flow on SiNx mask layer showed better structure and optical quality. It was assumed that the low NH3 flow in the initial growth stage considerably increased the GaN island density on the nano-porous SiNx layer by enhancing vertical growth. Lateral growth was significantly favored by high NH3 flow in the subsequent step. As a result,the improved crystal and optical quality was achieved utilizing NH3 flow modulation for GaN buffer growth on Si(111) substrate.

关键词： GaN epilayer MOCVD NH3 modulation

Broad applications of sensors based on laser-scribed graphene

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光:科学与应用(英文版) 2023年第8期12卷 1444-1445页

作者： Kuen Yao lau Jianrong Qiu Institute of Light+X Science and Technology Faculty of Electrical Engineering and Computer ScienceNingbo University315211 NingboZhejiangChina State Key Laboratory of Modern Optical Instrumentation College of Optical Science and EngineeringZhejiang UniversityHangzhou 310027China

Sensors based on graphene materials have promising applications in the fields of biology,medicine and environment etc.A laser-scribed graphene provides a versatile,low-cost,and environmental friendly method for stress... 详细信息

关键词： graphene versatile humidity

The Aerosol-Monsoon Climate System of Asia:A New Paradigm

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Journal of Meteorological Research 2016年第1期30卷 1-11页

作者： William K.M.lau Earth Science Interdisciplinary Center University of MarylandCollege Park

This commentary is based on a series of recent lectures on aerosol-monsoon interactions I gave at the Beijing Normal University in August 2015. A main theme of the lectures is on a new paradigm of ＂An Aerosol-Monsoon-Climate-System＂, which posits that aerosol, like rainfall, cloud, and wind, is an integral component of the monsoon climate system, influencing monsoon weather and climate on M1 timescales. Here, salient issues discussed in my lectures and my personal perspective regarding interactions between atmospheric dynamics and aerosols from both natural and anthropogenic sources are summarized. My hope is that under this new paradigm, we can break down traditional disciplinary barriers, advance a deeper understanding of weather and climate in monsoon regions, as well as entrain a new generation of geoscientists to strive for a sustainable future for one of the most complex and challenging human-natural climate sub-system of the earth.

关键词： aerosol monsoon climate system interaction new paradigm

Evaluating the emotion regulation of positive mood states among people with bipolar disorder using hierarchical clustering

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World Journal of Psychiatry 2021年第9期11卷 619-634页

作者： Sunny Ho-wan Chan Chong Ho Yu Ken Ho Kan Liu Charlie lau Anna On Yee Fung Samson Tse Department of Rehabilitation Sciences The Hong Kong Polytechnic UniversityHong KongChina School of Behavioral and Applied Science Azusa Pacific UniversityAzusaCA 91702United States Department of Social Work and Social Administration The University of Hong KongHong KongChina

BACKGROUND People with bipolar disorder(BD)frequently struggle with the recurrence of affective ***,the interplay between coping mechanism and positive mood state remains *** To explore the associations among behavioral approach system(BAS)sensitivity level,coping,and positive mood states among people with *** Using a cross-sectional study design,90 participants with BD were presented with four BAS-activating life event scenarios and assessed with regard to their BAS trait sensitivity,coping flexibility,and mood states.A hierarchical clustering method was used to identify different groups with different styles of *** hierarchical regression analyses were conducted to examine the mediating and moderating roles of different components of coping on mood *** A three-cluster solution was found to best fit the present data *** findings showed that a low mass of coping combined with low BAS sensitivity level protects people with BD from detrimentally accentuating mood states when they encounter BAS-activating life ***,coping flexibility is demonstrated to mediate and moderate the relationships between BAS sensitivity level and mood ***,subduing the perceived controllability and reducing the use of behavioral-activation/emotion-amplifying coping strategies could help buffer the effect of positive *** The judicious use of coping in emotion regulation for people with BD when encountering BAS-activating life events was *** applications and theoretical implications are highlighted.

关键词： Bipolar disorder Mood regulation Cluster analysis Coping style Positive emotions

Cadmium,chromium,copper,iron,lead,mercury,nickel,and zinc in freshwater fish:Assessing trophic transfer using stable isotope ratios ofδ^(15)N andδ^(13)C

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Journal of Environmental Sciences 2023年第6期128卷 250-257页

作者： Chester lau X.Chris Le Department of Chemistry Faculty of ScienceUniversity of AlbertaAlberta T6G 2G2Canada Division of Analytical and Environmental Toxicology Department of Laboratory Medicine and PathologyFaculty of Medicine and DentistryUniversity of AlbertaAlberta T6G 2G3Canada

Introduction The health benefits of consuming aquatic organisms are clear,given their high protein count,low saturated fats,and low cholesterol ***,in particular,contains valuable nutrients(e.g.,omega-3 polyunsaturated fats),vitamins,essential elements,and is therefore considered an important part of a balanced human *** is a major seafood producer,accounting for 58%of global production in 2018(Crona et al.,2020).China is the largest seafood consuming country in the world,with consumption rates steadily *** the 1978 Chinese economic reform,the amount of seafood consumed per capita in China increased from 5 kg per capita in 1980 to 41 kg in 2015(Zhang et al.,2021).By 2030,the overall amount of fish consumption will likely exceed the amount of fish production in China.

关键词： Aquatic environment Bioaccumulation Biomagnification Fish consumption Growth dilution effect Metal contamination Stable isotope ratio Trace elements Trophic levels

Multiomics approaches to uncover endometrial receptivity in embryo implantation:a mini-review

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Reproductive and Developmental Medicine 2024年第3期8卷 178-185页

作者： Sudini R.Fernando Yang Yan Manish Kumar Hoi-Lam Lai Yin-lau Lee Ernest H.Y.Ng William S.B.Yeung Kai-Fai Lee Department of Obstetrics and Gynaecology Li Ka Shing Faculty of MedicineThe University of Hong KongPokfulamHong Kong SAR 999077China Department of Animal Science Faculty of Animal Science and Export AgricultureUva Wellassa UniversityBadullaSri Lanka Shenzhen Key Laboratory of Fertility Regulation The University of Hong Kong-Shenzhen HospitalFutian DistrictShenzhen 518053China

Successful implantation requires concerted interactions during the apposition,adhesion,and invasion of the embryo into a receptive ***,the embryo implantation rate for assisted reproduction remains low despite the transfer of good quality *** in endometrial transcriptomics,proteomics,lipidomics,and even microbiota all play important roles in embryo ***,the expression of steroid hormone-regulated adhesive and anti-adhesive molecules during the embryo implantation window is becoming an area of increasingly intense *** review(a)summarizes the different molecules expressed in the receptive endometrium and(b)proposes the use of surface protein markers to predict pregnancy outcomes from assisted reproduction.

关键词： Cell surface proteins Steroid regulation Endometrial receptivity Receptivity marker Infertility

Effects of Epstein-Barr virus infection on the development of multiple myeloma after liver transplantation

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Science China(Life Sciences) 2012年第8期55卷 735-743页

作者： ZHANG YeWei ZHAO HeWei HE Xia ZHENG SuWen wanG TaiHong YAN DongLiang SUN JingFeng LU Xiang WEN JianFei lau wan Yee Department of Hepatobiliary and Pancreatic Surgery Affiliated Jiangsu Cancer Hospital of Nanjing Medical UniversityNanjing 210009China Department of Radiotherapy Affiliated Jiangsu Caneer Hospital of Nanjlng Medical University Nanjing 210009China Department of General surgery The Second Affiliated Hospital of Nantong University Nantong 226001China Departimen of Geriatrics The Second Affiliated Hospital of Nanjing Medical UniversityNanjing 210011China Faculty of Medicine The Chinese University of Hong KongPrince of Wales HospitalShatinHong KongChina

Reduced cellular immune function in patients after liver transplantation easily results in many types of viral infections,such as Epstein-Barr ***-Barr virus is a γ-herpesvirus and is related to many malignant diseases,especially epithelial and lymph *** abnormal interaction of cluster of differentiation 40 with cluster of differentiation 40 ligand and expression of cluster of differentiation 40 ligand are considered closely related to the development of myeloma *** study explored the influence and mechanism of Epstein-Barr virus infection on the phenotype and biological behavior of myeloma cells after liver *** cytometry was used to detect coexpression of cluster of differentiation 40 and cluster of differentiation 40 ligand in 10 samples of freshly isolated multiple myeloma *** of differentiation 40 and cluster of differentiation 40 ligand were coexpressed in sample Nos.5,8,9,and 10,particularly in sample *** blot analysis was used to detect the expression of the Epstein-Barr virus antigens latent membrane protein 1 and Epstein-Barr virus nuclear antigen 2 in the multiple myeloma cell line RPMI 8226 infected with Epstein-Barr *** antigen expression indicated that Epstein-Barr virus can infect multiple myeloma virus cells in *** transcription-polymerase chain reaction revealed upregulated expression of cluster of differentiation 40 ligand on the infected RPMI 8226 cells,which may be involved in the anti-apoptosis activity of the infected *** microscopy showed that pairs of molecules of cluster of differentiation 40,cluster of differentiation 40 ligand,and latent membrane protein 1 were colocalized on the surface of the infected *** chemokine receptor 4 was upregulated on the RPMI 8226 cells after Epstein-Barr virus *** migratory ability of the infected cells improved in the presence of the chemokine stromal cell-derived factor-1α.Anti-apoptosis and migration are k

关键词： liver transplantation CD40 CD40L multiple myeloma EBV

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海南海口话从完成义到先行义的“了”

方言 2024年第2期46卷 228-235页

作者：沈冰林华勇深圳职业技术大学职业技术教育学院深圳中山大学中国语言文学系广州

海南海口话的完结动词“了”逐步发展出了先行事态助词的用法,且这一功能扩展的过程伴有语音形式的弱化。“了”发展为先行事态助词的语法化路径为:完结动词>结果补语>完成体助词>先行事态助词,语音弱化过程为:[liau■]>[lau■]>[au■]... 详细信息

海南海口话的完结动词“了”逐步发展出了先行事态助词的用法,且这一功能扩展的过程伴有语音形式的弱化。“了”发展为先行事态助词的语法化路径为:完结动词>结果补语>完成体助词>先行事态助词,语音弱化过程为:[liau■]>[lau■]>[au■]。海口话“了”的演变丰富了汉语方言先行事态助词的来源和演变途径。

关键词：海南海口闽语“了” 完成先行语法化