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Assesment of Frequency-Magnitude of Extreme Rainfall Events-Case Study of the MeKong River Delta

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Journal of Environmental Science and Engineering(B) 2015年第3期4卷 161-168页

作者： Pham Hai An tran anh Tu tran Dinh Lan Nguyen Ngoc Tien Institute of Marine Environment and Resources VAST Haiphong 180000 Vietnam Institute of Marine Geology and Geophysics VAST Hainoi 1000000 Vietnam

Extreme rainfall events are primary natural hazards, which cause a severe threat to people and their properties in populated cities, which are normally located in coastal areas in Vietnam. Analysing these events by using a data series observed over years will support us to draw a picture of how the climate change impact on local environments. The purpose of this report is to understand the characteristics of the extreme rainfall events in MEKONG river delta (south VietNam). Daily rainfall data in the period of 30 years for a meteorological station in each area were collected from the Vietnam National Hydro-meteorological Service. The extreme rainfall events were defined as those exceeding the 95th percentile for each station. The analytical results show that the rainfall values (95th percentile) are 37.4 mm/day at Nam Can station, 27 mm/day at My Thanh station, 22.4 mm/day at Hoa Binh station, 23.8 mm/day at Binh Dai station and 22.7 mm/day at Ben Trai station. The highest rainfall data ever recorded are 246.4 mm/day (Nam Can), 174.5 mm/day (My Thanh), 179 mm/day (Hoa Binh), 187.3 mm/day (Binh Dai) and 136.3 mm/day (Ben Trai) during 1983-2012. The result of the Mann-Kendall tests show that there was a significant creasing of the rainfall at Nam Can, My Thanh station in two periods (1983-2012, 1998-2012) while no clear trend of the rainfall was recoreded at Hoa Binh, Binh Dai, Ben Trai station. In order to estimate the return period of the extreme rainfall events, the method General Extreme Value Distribution was used to calculate frequent distribution. The magnitudes of daily maximum rainfall were from 2 to 100 years. The results of return period show that maximum rainfalls are 46.6 mm at Nam Can station (highest) and 31.4 mm at Hoa Binh station (lowest) during 50 years. Similarly, maximum rainfalls are expected to be about 55.1 mm at Nam Can station and 37.2 mm at Hoa Binh station for 100 years.

关键词：降雨量三角洲湄公河事件 DAPI 幅度检测案例

Characteristics of Suspended Particulate Matter and the Coastal Turbidity Maximum Areas of the Mekong River

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Journal of Environmental Science and Engineering(A) 2015年第2期4卷 67-78页

作者： Vu Duy Vinh tran anh Tu tran Dinh Lan Nguyen Ngoc Tien Institute of Marine Environment and Resources Vietnam Academy of Science and Technology Haiphong 35999 Vietnam Institute of Marine Geology and Geophysics Vietnam Academy of Science and Technology Hanoi 10999 Vietnam

This paper presents the results of application of a 3D (three-dimensional) numerical model to study on MTZ (maximum turbidity zone) in the coastal zone of Mekong River Delta. In this study, a 3D system model with combination of hydrodynamics—-wave and suspended sediment transport was set up and validated with measured data in the study area. Based on calculated scenarios for the flood and the dry season, the results have shown appearance of MTZs in the coastal zone of Mekong River with suspended sediment concentration prevalent of 0.04-0.07 kg·m-3 (the dry season) and 0.05-0.1 kg·m-3 (the flood season). The position and MTZs scale change with the interaction between fresh water and tidal oscillations. The MTZ occur more in the dry seasons compared to the wet season. The MTZs are prevalent located far away from estuaries about in 12-22 km (in the dry season), and 5-15 km in the flood season.

关键词：最大浑浊带湄公河悬浮颗粒物沿岸悬浮泥沙浓度三维系统悬移质泥沙沿海地带

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中药治疗溃疡性结肠炎研究简况

实用中医内科杂志 2014年第8期28卷 181-183页

作者：陈英俊黎氏画陈明德袁红霞天津中医药大学国际学院越南河东传统医院内科越南河内100803

溃疡性结肠炎病因不明,西医治疗效果多不理想,采用中药内服,中药联合西药灌肠等多学科,内外结合治疗,疗效确切,副作用小,但临床机制有待于进一步深入探讨。

关键词：溃疡性结肠炎泄泻痢疾肠风中药内服灌肠中医药治疗

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基于SVM分类机的入侵检测系统

通信学报 2002年第5期23卷 51-56页

作者：陈光英张千里李星清华大学电子工程系北京100084

本文设计并实现了一种基于SVM分类机的入侵检测系统。它收集并计算除服务器端口之外TCP/IP的流量特征,使用SVM算法进行分类,从而识别出该连接的服务类型,通过与该连接服务器端口所表明服务类型的比较,检测出异常的TCP连接。在此基础上,... 详细信息

本文设计并实现了一种基于SVM分类机的入侵检测系统。它收集并计算除服务器端口之外TCP/IP的流量特征,使用SVM算法进行分类,从而识别出该连接的服务类型,通过与该连接服务器端口所表明服务类型的比较,检测出异常的TCP连接。在此基础上,本文深入探讨了TCP连接的观察时间、所取特征数目和SVM的核函数的选取对检测效果的影响。实验结果表明,本系统能够有效地检测出异常TCP连接。

关键词： SVM分类机入侵检测系统计算机网络网络安全

Improved Flame Retardant Properties of Polymers Epoxy Based on Antimony Trioxide/Chlorinated Paraffin

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材料科学与工程（中英文A版） 2014年第5期4卷 146-150页

作者： Bach Trong Phuc tran Vinh Dieu Nguyen Tuan anh Center Polymers and Composite Materials Hanoi University of Science and Technology Hanoi Viet Nam Faculty of Chemical Technology Hanoi University of Industry Minh Khai ward Tu Liem Ha Noi Viet Nam

In this study, the flame retardants such as chlorinated paraffin, antimony trioxide were combined with epoxy Epikote 240 resin cured by amine hardeners in order to increase flammability and maintain the mechanical strength of this material. The Underwriters Laboratories Inc (UL-94) and limiting oxygen index (LOI), thermal gravimetric analysis (TGA) and Field Emission Scanning Electron (FE-SEM) methods were used. The mechanical properties of materials have been determinted. The experiment indicated that a compound containing 9 phr antimony trioxide and 11phr cholorinated paraffin proved the best fire-retardant specification.

关键词：氯化石蜡环氧树脂阻燃性能三氧化二锑聚合物基 FE-SEM 三氧化锑极限氧指数

Safe Vegetable Consumption in Hue City:A Case Study of Food Safety Situation in Vietnam

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Journal of Agricultural Science and Technology(A) 2017年第B10期7卷 119-130页

作者： Nguyen Vinh Truong tran Thi Bach Thao tran Thi anh Tuyet Nguyen Van Khanh tran Quang Khanh Van University of Agriculture and Forestry Hue UniversityHue 530000Vietnam Institute of Biotechnology Hue UniversityPhu ThuongPhu VangThua Thien Hue 530000Vietnam

Food safety has become a growing concern for citizens in the modern society when consuming unsafe food that directly impacts public health,life quality and well-being of each *** of Vietnam in general and specially in Hue city have been facing challenge of vegetable unsafety.A survey concerning the consumption of safe vegetables was conducted in Hue city,*** were collected by using a well-structured questionnaire from representative of 30 consumers,30 producers and 10 *** results showed that lettuce,sweet potato and Chinese mustard were identified as the most important vegetables to consumers in Hue *** of the consumers purchased vegetable every *** cost of vegetable in every transaction was about 30,000 *** expenditure has not created a great motivation for developing safe vegetable *** of the consumers in Hue city showed high interest,demand,trust and satisfaction for safe ***,50%of the consumers reported that the price of the safe vegetable was quite expensive and price was not matched with their ***,there were some disadvantages in each stage of vegetable supply *** example,land,seed,capital,cultivation techniques,preliminary processing,preservation,brand name,trademark and place to consume have not met the requirement of high technology production for the supply chain of safe *** chain linking between the production and consumption of vegetables is not *** and consumers do not have closely *** can not be traced to origin and there is no safe *** consumers believe the quality of vegetables depending on the prestige suppliers,such as,the vegetable shops with foreign *** vegetables of farmers are very difficult to be certified for safe *** and suggestions to Hue city are proposed that it is necessary to establish the vegetable production area in Hue *** growers should be supported w

关键词： Food safety vegetable consumption vegetable supplying chain Hue city

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越南杜鹃花科新记录——深裂树萝卜

热带亚热带植物学报 2014年第2期22卷 143-146页

作者：阮氏青香阮进侠陈氏方英武进正童毅华夏念和越南科学技术院生态与生物资源研究所河内植物保存中心河内越南国家自然博物馆河内中国科学院华南植物园、中国科学院植物资源保护与可持续利用重点实验室广州510650 中国科学院大学北京100049

报道了越南杜鹃花科(Ericaceae)1新记录种——深裂树萝卜(Agapetes lobbii ***)。该种产自越南北部莱州省(Lai Chau)的Sin Ho地区,凭证标本保存在越南科学技术院生态和生物资源研究所标本馆(HN)。

关键词：树萝卜属 Agapetes lobbii 杜鹃花科新记录越南

汇率对越中双边贸易的影响:基于自回归分布滞后模型的研究结果

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中国-东盟研究 2019年第2期 49-81页

作者：范英俊陈氏霞阮孟雄王海峰(译) 蓝珊珊(译) 越南社会科学院世界经济和政治研究所越南社会科学院世界经济和政治研究所国际经济部越南胡志明国家政治学院广西大学国际学院

本文通过采用自回归分布滞后模型(ARDL),探讨越南盾/人民币汇率(包括汇率水平和波动性)对越中两国贸易的影响。分解模型结果表明,9种越南对中国的进口商品(约占进口总额的28.67%)对越南盾/人民币实际汇率水平的变化十分敏感。9种越南对... 详细信息

本文通过采用自回归分布滞后模型(ARDL),探讨越南盾/人民币汇率(包括汇率水平和波动性)对越中两国贸易的影响。分解模型结果表明,9种越南对中国的进口商品(约占进口总额的28.67%)对越南盾/人民币实际汇率水平的变化十分敏感。9种越南对中国的出口商品(约占出口总额的39.15%)也随汇率水平的变化而变化。大多数未受汇率波动影响的进出口商品是原材料、中间品和简单加工的产品。另外,聚合模型的结果表明,汇率与贸易之间没有联系。换句话说,汇率不太可能成为促进中越贸易平衡的有效工具。这将为越南的货币和贸易政策之间的有效协调提供经验依据。

关键词：贸易赤字汇率进出口中国越南