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Punch Multi-slice Longwall Mining System for Thick Coal Seam under Weak Geological Conditions

Journal of Geological Resource and Engineering 2015年第1期3卷 28-36页

作者： Takashi Sasaoka Akihiro Hamanaka Hideki Shimada Kikuo Matsui nay zar lin Budi Sulistianto Department of Earth Resources Engineering Kyushu University Fukuoka 819-0395 Japan Mine Planning Section Ministry of Mines Nay Pyi Taw Myanmar Department of Mining Engineering Institute Technology Bandung Bandung 40116 Indonesia

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Plastid phylogenomics provides new insights into the systematics,diversification,and biogeography of Cymbidium(Orchidaceae)

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Plant Diversity 2024年第4期46卷 448-461页

作者： Hai-Yao Chen Zhi-Rong Zhang Xin Yao Ji-Dong Ya Xiao-Hua Jin lin Wang Lu Lu De-Zhu Li Jun-Bo Yang Wen-Bin Yu Center for Integrative Conservation&Yunnan Key Laboratory for the Conservation of Tropical Rainforests and Asian Elephants Xishuangbanna Tropical Botanical GardenChinese Academy of SciencesMenglaYunnan 666303China University of Chinese Academy of Sciences Huairou DistrictBeijing 101408China Plant Germplasm and Genomics Center Germplasm Bank of Wild SpeciesKunming Institute of BotanyChinese Academy of SciencesKunmingYunnan 650201China State Key Laboratory of Plant Diversity and Specility Crops Institute of BotanyChinese Academy of SciencesHaidian DistrictBeijing 100093China School of Pharmaceutical Sciences Yunnan Key Laboratory of Pharmacology for Natural Productsand Yunnan College of Modern Biomedical IndustryKunming Medical UniversityKunmingYunnan 650500China Southeast Asia Biodiversity Research Institute Chinese Academy of SciencesYezinNay Pyi Taw 05282Myanmar

Cymbidium(Orchidaceae:Epidendroideae),with around 60 species,is widely-distributed across Southeast Asia,providing a nice system for studying the processes that underlie patterns of biodiversity in the ***,phylogenetic relationships of Cymbidium have not been well resolved,hampering investigations of species diversification and the biogeographical history of this *** this study,we construct a plastome phylogeny of 56 Cymbidium species,with four well-resolved major clades,which provides a framework for biogeographical and diversification rate *** dating and biogeographical analyses show that Cymbidium likely originated in the region spanning northern IndoBurma to the eastern Himalayas during the early Miocene(~21.10 Ma).It then rapidly diversified into four major clades in East Asia within approximately a million years during the middle *** *** to the adjacent regions(Borneo,Philippines,and Sulawesi)primarily occurred during the Pliocene-Pleistocene *** analyses indicate that the net diversification rate of Cymbidium has decreased since its origin,and is positively associated with changes in temperature and monsoon *** hydrothermal conditions brought by monsoon intensification in the early Miocene possibly contributed to the initial rapid diversification,after which the net diversification rate was reduced with the cooling climate after the middle *** transition from epiphytic to terrestrial habits may have enabled adaptation to cooler environments and colonization of northern niches,yet without a significant effect on diversification *** study provides new insights into how monsoon activity and temperature changes affected the diversification dynamics of plants in Southeast Asia.

关键词： Cymbidium East Asia Asian monsoons Climate change Biogeographical patterns

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Myanmar-India Trade Relations Since 1988

Myanmar-India Trade Relations Since 1988

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作者： nay lin Tun 华中师范大学

学位级别：硕士

1988年印度成为缅甸主要的出口市场之一以来,缅印两国在经济合作和技术进步领域的贸易关系蓬勃发展。缅甸主要向印度出口柚木、硬木、豆类和大米,而从印度进口的商品包括机械、纺织、纱线和钢铁。对印度来说,缅甸扮演着十分重要的角色:... 详细信息

1988年印度成为缅甸主要的出口市场之一以来,缅印两国在经济合作和技术进步领域的贸易关系蓬勃发展。缅甸主要向印度出口柚木、硬木、豆类和大米,而从印度进口的商品包括机械、纺织、纱线和钢铁。对印度来说,缅甸扮演着十分重要的角色:它是东南亚的“门户”,也是东盟的一员,与印度拥有共同的陆地边界和海洋边界。1991年,印度总理雷欧(Narasimha Rao)采取“东望”政策,两国关系得到进一步发展,并为开展边境贸易提供了有利条件。2011年之后,两国贸易关系明显著增强,印度占缅甸出口总额的四分之一。缅甸和印度拥有正常的贸易关系,为逐步发展两国常规贸易和边境贸易做出了有益贡献。本研究旨在找出贸易关系对两国至关重要的原因所在。本文采用了定性和定量文献分析方法。二手资料中使用的大多数数据来自于学术文章、期刊、政府信息和报纸。与此同时,本文还使用了通过正式访而谈得到的一手数据。2014年,印度现任总理莫迪(Narendra Modi)将“东望政策”升级为“东进政策”。印度东北部地区与缅甸相连,为促进该地区经济发展,印度采取了“东望政策”。这也是为什么印缅两国经济迅速发展的原因所在。印度和缅甸的贸易关系取决于两国双边边境贸易的增长。这项政策中,印度正加大投资,从而改善与缅甸和东南亚地区其他国家的实物交换、制度交流和人文交流。印度一直在为加强与缅甸的经贸关系而努力,其中包括印度-缅甸-泰国三边公路项目和卡拉丹多模式联运项目。本研究将验证这些联通工程是否会促进缅甸与印度之间的贸易。本文探讨了影响缅印两国度边境贸易的关键性因素。事实证明,两国的贸易政策变化极为重要。随后本文分析了印度“东进政策”对缅印度贸易关系的影响。本文提到,印度的“东进政策”改善了两国的双边贸易,促进了多边倡议。但与此同时,因为基础设施不完善、道路连接工程延期以及边界安全问题,双边贸易关系也面临严峻考验。但是,两国的贸易关系将促进边境检查站的发展,加强两国的关系。综上所述,本研究发现,两国的双边贸易关系,为两国带来了挑战,也带来了新的发展机遇。

关键词：缅甸印度贸易关系边境贸易东进政策

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Analytical Identification of Magnetic Faults Induced by Material Properties and Mechanical Tolerance in PM Synchronous Motor

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World Journal of Engineering and Technology 2017年第1期5卷 27-41页

作者： Yinquan Yu Quan Jiang nay lin Htun Aung Drive Systems and Technologies Division Data Storage Institute A-Star Singapore

This paper presents an analytical model suitable for analyzing Permanent Magnet Synchronous motors. The difference between mass eccentricity and magnet eccentricity is described. The full derived vibration mathematical model incorporates both the electrical domain and mechanical domain. The shaft bending force, mass eccentricity exciting force, aerodynamic exciting force, and unbalanced-Magnet-Pull (UMP) are introduced in this three-dimensional motor model. The relative displacement between rotor and stator is calculated in order to avoid rotor to stator rub. The experiments were conducted with Laser Vibrometer for verifying the analysis results. The measurement results prove the effectiveness of the proposed analytic method.

关键词： Mass Eccentricity Magnet Eccentricity Unbalanced-Magnet-Pull (UMP) Vibration Laser Vibrometer

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Mapping and modelling the impact of mass drug adminstration on filariasis prevalence in Myanmar

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Infectious Diseases of Poverty 2018年第1期7卷 541-551页

作者： Ni Ni Aye Zaw lin Khin Nan Lon nay Yi Yi linn Thet Wai Nwe Khin Mon Mon Kapa Ramaiah Hannah Betts Louise A.Kelly-Hope Ministry of Health and Sports Department of Public HealthNay Pyi TawMyanmar Tagore Nagar PondicherryIndia Department of Parasitology Centre for Neglected Tropical DiseasesLiverpool School of Tropical MedicineLiverpoolUK

Background:Lymphatic filariasis(LF)is endemic in Myanmar and targeted for *** highlight the National Programme to Eliminate Lymphatic Filariasis(NPELF)progress between 2000 and 2014,this paper describes the geographical distribution of LF,the scale-up and impact of mass drug administration(MDA)implementation,and the first evidence of the decline in transmission in five ***:The LF distribution was determined by mapping historical and baseline prevalence data collected by *** on the MDA implementation,reported coverage rates and sentinel site surveillance were summarized.A statistical model was developed from the available prevalence data to predict prevalence at township level by year of *** assessment survey(TAS)methods,measuring antigenemia(Ag)prevalence in children,were used to determine whether prevalence was below a level where recrudescence is unlikely to ***:The highest baseline LF prevalence was found in the Central Valley *** MDA implementation activities scaled up to cover 45 districts,representing the majority of the endemic population,with drug coverage rates ranging from 60.0%to 98.5%.Challenges related to drug supply and local conflict were reported,and interrupted MDA in some ***,significant reductions in LF prevalence were found,especially after the first 2 to 3 rounds of MDA,which was supported by the corresponding *** TAS activities in five districts found only two Ag positive children,resulting in all districts passing the critical ***:Overall,the Myanmar NPELF has made positive steps forward in the elimination of LF despite several challenges,however,it needs to maintain momentum,drawing on international stakeholder support,to aim towards the national and global goals of elimination.

关键词： Lymphatic filariasis Elephantiasis Wuchereria bancrofti Neglected tropical diseases Mass drug administration Transmission assessment surveys Surveillance Myanmar

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Chemical Constituents from Ethanoic Extracts of the Aerial Parts of Leea aequata L.,a Traditional Folk Medicine of Myanmar

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Natural Products and Bioprospecting 2019年第3期9卷 243-249页

作者： nay lin Tun Dong-Bao Hu Meng-Yuan Xia Dong-Dong Zhang Jun Yang Thaung Naing Oo Yue-Hu Wang Xue-Fei Yang Southeast Asia Biodiversity Research Institute Chinese Academy of SciencesYezinNay Pyi Taw 05282Myanmar Key Laboratory of Economic Plants and Biotechnology and the Yunnan Key Laboratory for Wild Plant Resources Kunming Institute of BotanyChinese Academy of SciencesKunming 650201People’s Republic of China University of Chinese Academy of Sciences Beijing 100049People’s Republic of China College of Resources and Environment Yuxi Normal UniversityYuxi 653100People’s Republic of China Forest Research Institute YezinNay Pyi Taw 05282Myanmar

We aimed at reporting the chemical constituents and antimicrobial activities of Leea aequata L.,a traditional folk medicine used in Myanmar for the treatment of wounds and skin diseases.A new neolignan,(7S,8R)-9′-O-acetylcedrusin(1),a new lactam,(3S,4S)-4-chloro-3-hydroxypiperidin-2-one(2),along with 21 known compounds,including fve lignans(3-7),four favonoid glycosides(8-11),and others(12-23),were isolated from the ethanoic extract of the aerial parts of *** structures of the new compounds were determined by NMR,MS,and ECD *** all the antimicrobial tests of the 23 compounds,only 3,4,5-trihydroxybenzoic acid ethyl ester(17)showed weak inhibitory activities against Escherichia coli and Salmonella enterica ***.

关键词： Leea aequata Vitaceae Traditional medicines Lignans Flavonoids

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怒江云南段鱼类多样性现状与威胁因子

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生物多样性 2024年第7期32卷 25-39页

作者：张作鹏要晨阳吴玲罗遵兰孙光郭宗勇李晓思林峰陈小勇安徽师范大学生命科学学院安徽芜湖241000 中国科学院昆明动物研究所遗传资源与进化国家重点实验室&云南省高黎贡山生物多样性重点实验室昆明650201 中国科学院东南亚生物多样性研究中心缅甸内比都05282 云南省东南亚生物多样性保护国际联合实验室云南勐腊666303 中国科学院大学北京100049 中国环境科学研究院北京100012 怒江傈僳族自治州渔业工作站云南泸水673199

怒江是中国西南地区重要的国际河流,是云南六大水系之一。为了解怒江云南段的鱼类多样性现状及受威胁因素,本研究于2019–2020年对怒江云南段的干流及其支流的53个采样点进行了系统的调查,并对该流域的鱼类多样性和威胁因子进行了分析... 详细信息

怒江是中国西南地区重要的国际河流,是云南六大水系之一。为了解怒江云南段的鱼类多样性现状及受威胁因素,本研究于2019–2020年对怒江云南段的干流及其支流的53个采样点进行了系统的调查,并对该流域的鱼类多样性和威胁因子进行了分析。结果表明,怒江云南段共记录鱼类9目26科59属89种,本研究采集到鱼类6目20科42属51种。相对重要性指数分析发现,怒江云南段优势种为密带南鳅(Schisturapoculi),且指数得分远远高于其他鱼类。物种多样性指数表明,怒江云南段Shannon-Wiener多样性指数、Margalef物种丰富度指数、Simpson优势度指数、Pielou均匀度指数分别为2.10、5.91、0.71、0.53;怒江干流以及两条较大支流罗明坝河和勐波罗河鱼类多样性较高。相似度分析发现,怒江云南段各河段或河流鱼类组成差异较大。通过Pheatmap对威胁因子分析,结果显示对怒江云南段鱼类多样性的主要威胁因素依次为农业/生活垃圾污染、捕捞、外来种入侵和支流水利水电工程建设。

关键词：怒江鱼类资源鱼类多样性威胁因子

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伺服阀前置级流场气穴现象的仿真及试验研究

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机电工程 2014年第10期31卷 1239-1243,1253页

作者：韩笑 nay zar Aung 曹俊章李松晶哈尔滨工业大学体控制及自动化系黑龙江哈尔滨150001

针对液压阀中的气穴现象会引起液压阀的噪音、性能恶化,甚至导致液压阀失效等问题,对伺服阀前置级喷嘴和挡板之间流场中的气穴现象进行了研究。利用Pro/E软件对流场进行了三维建模,用前处理软件Gambit对三维模型进行了网格划分及边界条... 详细信息

针对液压阀中的气穴现象会引起液压阀的噪音、性能恶化,甚至导致液压阀失效等问题,对伺服阀前置级喷嘴和挡板之间流场中的气穴现象进行了研究。利用Pro/E软件对流场进行了三维建模,用前处理软件Gambit对三维模型进行了网格划分及边界条件设置,利用标准k-ε模型和混合气穴模型建立流场的数学模型,运用FLUENT软件对不同喷嘴入口流速下流场的分布特性及气穴特征进行了仿真分析;同时利用高速摄像机对喷嘴挡板之间的流场分布进行了观测和记录。研究结果表明,在低雷诺数流动条件下,气穴开始在喷嘴外壁和挡板前端的边缘形成;随着雷诺数的增大,在挡板弯曲的附体气穴逐渐长大并随着射流流速的增加出现云状的气穴。将不同流动条件下流场结构和气穴分布的数值计算结果与试验观测结果进行比较,两者基本吻合,说明伺服阀前置级流场气穴仿真模型和数值计算方法是可靠的。

关键词：伺服阀气穴流场喷嘴挡板

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Heat diffusion optimization in high performance perovskite solar cells integrated with zeolite

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Journal of Energy Chemistry 2023年第11期86卷 308-317,I0007页

作者： Wei Wang Jian Zhang Kaifeng lin Jiaqi Wang Boyuan Hu Yayu Dong Debin Xia Yulin Yang MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin 150001HeilongjiangChina

Heat accumulation inside perovskite solar cells causes the decomposition of the perovskite layer and hole transport materials(HTMs)under working conditions,yielding a decrease in long-term ***,we present a zeolite-assisted heat conduction strategy by introducing economic zeolite crystals(e.g.,NaX,nay,and ZSM-5)as a cooling filter to induce heat *** fitted thermal diffusion kinetic equation from real-time infrared thermal imaging technology reveals the zeolite skeleton assisted thermal co nduction mechanism of internal lattice ***,the nearly twofold improved conductivity of the modified HTM film is benefited from Na^(+)hopping on the supercages of the zeolite,therefore,the best-performed device with a rapid heat diffusion and defect inhibition obtains a remarkable power conversion efficiency of 23.42%.Both of NaX modified sprio-OMeTAD and PTAA based devices exhibit excellent operational stability after heating 1000 h at 85℃under N_(2)*** work demonstrates the potential application of economical porous zeolite materials in improving the thermal stability of PSCs.

关键词： Zeolite Heat diffusion Perovskite solar cells Operational stability

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Challenges in early phase of implementing the 1-3-7 surveillance and response approach in malaria elimination setting:A field study from Myanmar

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Infectious Diseases of Poverty 2020年第1期9卷 100-100页

作者： Poe Poe Aung Zaw Win Thein zar Ni Min Hein Kyaw Thet Aung Nwe Oo Mon nay Yi Yi linn Aung Thi Khin Thet Wai Thae Maung Maung Duke Global Health Institute Myanmar Program YangonMyanmar 不详

Background:The National Plan for Malaria Elimination(NPME)in Myanmar(2016–2030)aims to eliminate indigenous Plasmodium falciparum malaria in six states/regions of low endemicity by 2020 and countrywide by *** achieve this goal,in 2016 the National Malaria Control Program(NMCP)implemented the“1-3-7”surveillance and response *** study aims to identify the barriers to successful implementation of the NPME which emerged during the early phase of the“1-3-7”approach ***:A mixed-methods study was conducted with basic health staff(BHS)and Vector Born Disease Control Program(VBDC)staff between 2017 and 2018 in six townships of six states/regions targeted for sub-national elimination by 2020.A self-administered questionnaire,designed to assess the knowledge required to implement the“1-3-7”approach,was completed by 544 *** analysis was performed for quantitative findings and thematic analysis was conducted for qualitative findings using *** ***:Although 83%of participants reported performing the key activities in the“1-3-7”surveillance and response approach,less than half could report performing those activities within 3 days and 7 days(40 and 43%,respectively).Low proportion of BHS correctly identified six categories of malaria cases and three types of foci(22 and 26%,respectively).In contrast,nearly 80%of respondents correctly named three types of case detection *** cited challenges included‘low community knowledge on health’(43%),‘inadequate supplies’(22%),and‘transportation difficulty’(21%).Qualitative data identified poor knowledge of key surveillance activities,delays in reporting,and differences in reporting systems as the primary *** dominant perceived barrier to success was inability to control the influx of migrant workers into target jurisdictions especially in hard-to-reach *** with township medical officers and the NMCP team leaders further highlighted the necessity o

关键词： Malaria elimination 1-3-7 approach Surveillance and response Basic health staff Mixed methods Myanmar

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