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Roanu台风中突然天气变化的自动气象站资料评估（英文）

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南京信息工程大学学报（自然科学版） 2018年第3期10卷 324-333页

作者： Charith Madusanka WIdANAGE 王东晓周峰华 tilak p.d.gamage Shengan WANG WICKRAMAGE C.H. GEEGANA gamage G.R.G. 黎大宁中国科学院南海海洋研究所热带海洋环境国家重点实验室卢胡纳大学渔业和海洋科学技术学院佩拉德尼亚大学工程学部

以斯里兰卡南部5.936 108°N、80.574 900°E处的自动气象站(AWS)的气象时间序列观测数据为依据,对2015年12月至2016年10月大气边界层的变化进行了定量分析.结果表明,印度洋北部的季风、气温、气压、相对湿度、降水和向下短波辐射的扰... 详细信息

以斯里兰卡南部5.936 108°N、80.574 900°E处的自动气象站(AWS)的气象时间序列观测数据为依据,对2015年12月至2016年10月大气边界层的变化进行了定量分析.结果表明,印度洋北部的季风、气温、气压、相对湿度、降水和向下短波辐射的扰动随着季风的逆转而变化.2016年5月台风Roanu经过时,气压降低、相对湿度增大、降水增强和向下短波辐射减小,其特征是温度、相对湿度、降水和风速均迅速增加,之后气温和降水下降,而气压、向下短波辐射在急剧减小之后又急剧增大.自动气象站记录了台风到达前的气象条件,并自2016年5月13日起各个参数开始响应台风变化.从2016年5月28日开始,自动气象站记录台风通过后的气象条件,此时降水和向下辐射均减少.这些信号说明应用自动气象站可以持续观测台风条件.这项研究表明,斯里兰卡南部地区的气象数据可以用来进行天气评估,并可以对南部沿海地区的海气关系现象进行分析.此外,自动气象站的现场数据可以用作模型验证和参数化.

关键词：自动气象站台风Roanu 南斯里兰卡风

斯里兰卡近岸风暴潮模拟中风暴潮-潮汐相互作用特征分析:一个个例研究（英文）

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南京信息工程大学学报（自然科学版） 2018年第3期10卷 342-352页

作者： R.K.K.A.S.N.KOdITHUWAKKU 李毅能彭世球朱宇航李少钿 tilak p.d.gamage 付莉莉中国科学院南海海洋研究所热带海洋环境国家重点实验室钦州学院广西北部湾海洋灾害研究重点实验室卢胡纳大学

利用三维普林斯顿海洋模型(pOM)以及逐时水位观测数据,研究印度洋北部斯里兰卡北部海岸风暴潮-潮汐相互作用特征.选择了2008年的"Nisha"台风作为台风风暴潮个例进行研究,并进行了3个数值敏感性试验.经验证,该风暴潮模型可以很好地再现... 详细信息

利用三维普林斯顿海洋模型(pOM)以及逐时水位观测数据,研究印度洋北部斯里兰卡北部海岸风暴潮-潮汐相互作用特征.选择了2008年的"Nisha"台风作为台风风暴潮个例进行研究,并进行了3个数值敏感性试验.经验证,该风暴潮模型可以很好地再现该台风期间研究区域内的潮汐和总海水水位.试验结果表明,沿斯里兰卡西北海岸的风暴潮-潮汐相互作用显著,其强度与台风的强度和轨迹相关.当TC在42 h达到较大强度时,可以得到风暴潮-潮汐相互作用导致的最大增水值TSI(0.6 m)和从印度洋外海向斯里兰卡西北部浅滩流入的最大相互作用流场.在TC强度较弱的第30小时,得到最大负TSI(-0.6 m)和向南流出西北部浅水区域的较弱的相互作用流场.在整个台风期间,强TSI都发生在斯里兰卡西北部海滩到对岸的印度洋近岸区域.

关键词：普林斯顿海洋模型(pOM) 潮汐-风暴潮相互作用风暴潮斯里兰卡

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阿拉伯海小暖池混合层盐度的年度变化

Roanu台风中突然天气变化的自动气象站资料评估

南京信息工程大学学报（自然科学版） 2018年第3期 299-310页

关键词：阿拉伯海暖池区年际变化混合层盐度收支气候模态指数

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deformation mechanism of bimodal microstructure in Ti-6Al-4V alloy:The effects of intercritical annealing temperature and constituent hardness

南京信息工程大学学报（自然科学版） 2018年第3期 324-333页

关键词：自动气象站台风Roanu 南斯里兰卡风

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Journal of Materials Science & Technology 2021年第12期71卷 138-151页

作者： Yan Chong tilak Bhattacharjee Yanzhong Tian Akinobu Shibata Nobuhiro Tsuji department of Materials Science and Engineering Kyoto UniversityKyotoJapan department of Materials Science and Engineering University of CaliforniaBerkeleyCAUSA Elements Strategy Initiative for Structural Materials(ESISM) Kyoto UniversityKyotoJapan Key Laboratory for Anisotropy and Texture of Materials School of Materials Science and EngineeringNortheastern UniversityShenyang 110819China Research Center for Metallic Wires Northeastern UniversityShenyang 110819China

The so-called bimodal microstructure of Ti-6 Al-4 V alloy,composed of primaryαgrains(α_(p))and transformed β areas(β_(trans)),can be regarded as a"dual-phase"structure to some extent,the mechanical properties of which are closely related to the sizes,volume fractions,distributions as well as nanohardness of the two *** this study,the volume fractions of primaryαgrains(vol.%(α_(p)))were systematically modified in three series of bimodal microstructures with fixed primaryαgrain sizes(0.8μm,2.4μm and 5.0μm),by changing the intercritical annealing temperature(T_(int)).By evaluating the tensile properties at room temperature,it was found that with increasing T_(int)(decreasing vol.%(α_(p))),the yield strength of bimodal microstructures monotonically increased,while the uniform elongation firstly increased with T_(int)until 910°C and then drastically decreased afterwards,thereby dividing the T_(int)into two regions,namely region I(830-910°C)and region II(910-970℃).The detailed deformation behaviors within the two regions were studied and compared,from the perspectives of strain distribution analysis,slip system analysis as well as dislocation *** bimodal microstructures in region I,due to the much lower nano-hardness ofβ_(trans)thanα_(p),there was a clear strain partitioning between the two constituents as well as a strain gradient from theα_(p)/β_(trans)interface to the grain interior ofα_(p).This activated a large number of geometrically necessary dislocations(GNds)near the interface,mostly with components,which contributed greatly to the extraordinary work-hardening abilities of bimodal microstructures in region *** increasing T_(int),theα_(p)/β_(trans)interface length density gradually increased and so was the density of GNds with components,which explained the continuous increase of uniform elongation with T_(int)in this *** bimodal microstructures in region II,where the nano-hardness ofβ_(trans)andα_(p)were comparable,neither a clear s

关键词： Ti-6Al-4V Bimodal microstructure Intercritical annealing temperature Strain distribution dislocation

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孟加拉湾4个典型地区的涡旋热和盐输送

华东师范大学学报（自然科学版） 2020年第S1期 125-129页

作者： pERERA Lasitha 陈更新 gamage tilak 王东晓中国科学院南海海洋研究所热带海洋环境国家重点实验室广州510301 中国科学院大学北京100049 卢胡那大学渔业和海洋科学技术学院斯里兰卡马塔拉81000

利用涡扩散法、海面高度资料和气候水文资料,对孟加拉湾海域海盆尺度涡(湍流)致热盐输运进行了估算.结果发现,在孟加拉湾大量的涡致输运主要存在于4个区域:孟加拉湾北部的西部边界(NB)、孟加拉湾西部(WB)、斯里兰卡南部和东部(SWB)以及... 详细信息

利用涡扩散法、海面高度资料和气候水文资料,对孟加拉湾海域海盆尺度涡(湍流)致热盐输运进行了估算.结果发现,在孟加拉湾大量的涡致输运主要存在于4个区域:孟加拉湾北部的西部边界(NB)、孟加拉湾西部(WB)、斯里兰卡南部和东部(SWB)以及孟加拉湾东南部靠近马六甲海峡区域(SEB).根据涡输运的气候态分布,涡致热输运主要存在于NB和SWB海域,而涡致盐输运主要存在于NB、SWB和SEB海域.基于季节平均的涡致输运估计, NB和SWB海域涡致热输运较为显著的季节为初夏和夏季季风季节,而在WB和SEB海域为后夏季风季节.此外,季节性涡流动能(EKE)调制通过季节性强化的东印度洋沿岸流(EICC)和西南/东北季风电流(SMC/NMC),被确定为影响季节性涡流的主要因素之一,在NB、WB和SWB区域分别进行运输.

关键词：涡迪扩散涡热传输涡食盐运输

power quality investigation of a solar pV transformer-less grid-connected system fed dVR

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Frontiers in Energy 2014年第2期8卷 240-253页

作者： Akhil GUpTA Saurabh CHANANA tilak THAKUR department of Electrical Engineering National Institute of Technology Kurukshetra 136119 India department of Electrical Engineering PEC University of Technology Chandigarh 160012 India

This paper presents a single stage transformerless grid-connected solar photovoltaic （pV） system with an active and reactive power control. In the absence of active input power, the grid-tied voltage source converter （VSC） is operated in a reactive power generation mode, which powers the control circuitry, and maintains a regulated dC voltage to the VSC. A data-based maximum power point tracking （MppT） control scheme which performs power quality control at a maximum power by reducing the total harmonic distortion （THd） in grid injected current as per IEEE-519/1547 standards is implemented. A proportionalintegral （p1） controller based dynamic voltage restorer （dVR） control scheme is implemented which controls the grid side converter during single-phase to ground fault. The analysis includes the grid current THd along with the corresponding variation of the active and reactive power during the fault condition. The MppT tracks the actual variable dC link voltage while deriving the maximum power from the solar pV array, and maintains the dC link voltage constant by changing the modulation index of the VSC. Simulation results using Matlab/Simulink are presented to demonstrate the feasibility and validations of the proposed novel MppT and dVR control systems under different environmental conditions.

关键词： data-based maximum power point tracking (MppT) total harmonic distortion (THd) proportional integral control voltage restorer pulse width modulation

An international program on Silk Road disaster Risk Reduction--a Belt and Road initiative (2016-2020)

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Journal of Mountain Science 2018年第7期15卷 1383-1396页

作者： LEI Yu CUI peng Amar deep REGMI Virginia MURRAY Alessandro pASUTO Giacomo TITTI Muhammad SHAFIQUE tilak pRIYAdARSHANA d.G. Key Laboratory of Mountain Hazards and Earth Surface processes/Institute of Mountain Hazards and Environment Chinese Academy of Sciences Chengdu 610041 China University of Chinese Academy of Sciences Bering 100049 China CAS Center for Excellence in Tibetan plateau Earth Sciences Beijing 100101 China public Health England London 133-155 England UNISdR Scientific and Technical Advisory Group Geneva Switzerland Integrated Research on disaster Risk Scientific Committee Beijing 100094 China Research Institute for C-eo-Hydrological protection National Research Council 4- 35127 Padova Italy National Center of excellence in Geology University of Peshawar Peshawar 25130 Pakistan Internal Quality Assurance Unit &Center for International Affairs University ofRuhuna Matara Sri Lanka

Belt and Road Initiative(BRI) is a Chinese national strategy which calls for cooperative economic, political and cultural exchange at the global level along the ancient Silk Road. The overwhelming natural hazards located along the belt and road bring great challenges to the success of BRI. In this framework, a 5-year international program was launched to address issues related to hazards assessment and disaster risk reduction(dRR). The first workshop of this program was held in Beijing with international experts from over 15 countries. Risk conditions on Belt and Road Countries(BRCs) have been shared and science and technology advancements on dRR have been disseminated during the workshop. Under this program, six task forces have been setup to carry out collaborative research works and three prioritized study areas have been established. This workshop announced the launching of this program which involved partners from different countries including pakistan, Nepal, Russia, Italy, United Kingdom, Sri Lanka and Tajikistan. The program adopted the objectives of Sendai Framework for disaster Risk Reduction 2015-2030 and United Nation Sustainable development Goals 2030 and was implemented to assess disaster risk in BRCs and to propose suitable measures for disaster control which can be appropriate both for an individual country and for specific sites. This paper deals with the outcomes of the workshop and points out opportunities for the near future international cooperation on this matter.

关键词： Natural hazards Silk Road disaster risk reduction Belt and Road Initiative Sendai Framework International collaboration program

Tunneled biopsy is an underutilised,simple,safe and efficient method for tissue acquisition from subepithelial tumours

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World Journal of Clinical Cases 2021年第21期9卷 5822-5829页

作者： Andreas Koutsoumpas Ruwan perera Adele Melton Jonathan Kuker tilak Ghosh Barbara Braden Translational Gastroenterology Unit Oxford University Hospitals NHS Foundation TrustOxford OX39DUUnited Kingdom Senior School Magdalen College SchoolOxford OX40DZUnited Kingdom Translational Gastroenterology Unit Oxford University Hospital NHS Foundation TrustOxford OX39DUUnited Kingdom

BACKGROUNd Tissue acquisition from subepithelial lesions is often attempted by endoscopic ultrasound(EUS)-sampling as conventional endoscopic biopsy usually fails to reach deeper layers of the gastrointestinal *** To investigate the utilisation,safety and diagnostic yield of an intensified“biteon-bite”tunnel biopsy *** In this retrospective cohort study,all patients presenting with subepithelial masses in the upper gastrointestinal tract from March 2013 to July 2019 were *** were analysed for size and location of the subepithelial mass,use of intensified tunnel biopsy protocol(more than 10 double bite-on-bite biopsies)or superficial conventional biopsies,histology and imaging results,occurrence of readmission and adverse events after *** Two hundred and twenty-nine patients with subepithelial lesions were *** conventional biopsies were taken in 117 patients and were diagnostic only in one lipoma(0.9%).Tunnel biopsies taken in 112/229(48.9%)patients were significantly more likely to provide histological diagnosis(53.6%;pdiagnostic yield of tunnel biopsies further increased to 41/67(61.2%).No immediate or delayed complications were *** 8 of the 51 endoscopists(15.7%)regularly attempted tunnel *** Tunnel biopsy is a simple,safe and efficient but underutilised diagnostic modality for tissue acquisition in subepithelial *** should be routinely attempted at the initial endoscopy.

关键词： Gastrointestinal stromal tumour Fine needle biopsy Lipoma Immunohistology Neuroendocrine tumours Fine needle biopsy