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Beach Profiles Characteristics Along Giao Thuy and hai Hau Coasts,Vietnam:A Field Study

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China Ocean Engineering 2012年第4期26卷 699-712页

作者： nguyen Viet Thanh 郑金海张弛 State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Hohai University College of Harbor Coastal and Offshore Engineering Hohai University Faculty of Civil Engineering University of Transport and Communications

Giao Thuy and hai Hau coasts are located in Nam Dinh province, Vietnam, with a total coastline of 54.42 km in length. The sea-dike system has been seriously damaged and there have been many dike breaches which caused floods and losses. This situation is considered of a general representative for coastal area in the northern part of Vietnam. A variety of studies have shown that the gradient in the longshore sediment transport rate and the offshore fine sediment lost are the main mechanisms causing the beach erosion. This study presents a field investigation of the beach profiles at Giao Thuy and hai Hau beaches. Three types of empirical functions for the equilibrium beach profile are applied and compared with the observations. Results show that all observed beach profiles can be described by a single function. However, one specific equilibrium profile equation is not sufficient to assess all beach profiles. In Section 1 of Giao Thuy and Section 3 of hai Thinh beaches, beach profiles are consistent with the logarithmic function, while the exponential function fits well in Section 2. This difference is explained with respect to coastal morphology, sediment characteristics and hydrodynamic conditions which vary in site. An analysis of the validity of the beach profile functions is recommended for the numerical modeling and engineering designs in this area.

关键词： beach profile field study power function exponential function logarithmic function

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中国电视剧在越南的传播及其影响

中国电视剧在越南的传播及其影响

作者： nguyen THI hai YEN（阮氏海燕）华南理工大学

学位级别：硕士

中国电视剧自20世纪80年代开始发轫,伴随着传播技术的飞速发展、电视受众群体的不断壮大,30多年后的今天,电视剧作为当今电视节目的重要形态,已成为大众文化的一种载体。中国电视剧不仅在国内获得比较大的发展和进步,还不断进入海外市场... 详细信息

中国电视剧自20世纪80年代开始发轫,伴随着传播技术的飞速发展、电视受众群体的不断壮大,30多年后的今天,电视剧作为当今电视节目的重要形态,已成为大众文化的一种载体。中国电视剧不仅在国内获得比较大的发展和进步,还不断进入海外市场,包括东南亚、欧美、非洲等区域。就影响所及以及文化传播的角度来看,中国电视剧对东南亚,特别是对越南的影响力尤为巨大。从上个世纪90年代中越邦交正常化以来,中越两国在政治、经济、教育、科技等领域的合作与交流更为广泛和密切。中国电视剧也是伴随着中越邦交正常化进入越南市场,并在越南吸引了大量各阶层的观众。从中越文化交流的角度看,中国电视剧实际上为越南观众提供了一个了解中国社会和文化的窗口。本文研究的题目是“中国电视剧在越南的传播及其影响”,牵涉到中国和越南两国文化。因此本文将从跨文化传播的视角考察中国电视剧在越南的传播历程、影响因素等,并借此进一步研究越南观众对中国电视剧的接受心理。而在这方面,越南国内几乎没有现存的文献,作为一个留学生,希望能在这个方面填补越南跨文化传播研究的空白。本文通过问卷调查法对越南观众进行研究。研究内容主要有四个方面：第一,中国电视剧在越南的传播途径及手段;第二,中国电视剧在越南的传播效果;第三,中国电视剧输入越南的主要类型及受欢迎情况;第四,中国电视剧对越南社会文化的影响。整个调查围绕这四个部分进行,通过调查资料的归类,并结合跨文化传播的系列理论,分析得出中国电视剧在越南传播过程中跨文化传播的内容,影响因素等。最后根据研究结果提出相应的跨文化传播传播建议,以深入探讨越南观众借助中国电视剧完成的文化融合,从而为两国民众在历史和文化层面的沟通和交流提供学识上的贡献。

关键词：中国电视剧跨文化传播越南观众

安庆-贵池矿集区宝树尖铜多金属矿床成因:来自岩石地球化学及年代学的约束

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岩石学报 2020年第1期36卷 184-204页

作者：汪海赵壮杨晓勇古黄玲郑荥 nguyen Tuan Anh 中国科学技术大学地球和空间科学学院湖南工业大学安徽省地勘局324地质队

宝树尖铜多金属矿床位于长江中下游成矿带安庆-贵池矿集区,是一个新发现的矽卡岩型矿床。本文主要通过岩石地球化学和年代学方法来解释矿床的成因。锆石U-Pb年代学研究表明,宝树尖岩体形成于148.6±3.2Ma,是长江中下游燕山晚期的产物,... 详细信息

宝树尖铜多金属矿床位于长江中下游成矿带安庆-贵池矿集区,是一个新发现的矽卡岩型矿床。本文主要通过岩石地球化学和年代学方法来解释矿床的成因。锆石U-Pb年代学研究表明,宝树尖岩体形成于148.6±3.2Ma,是长江中下游燕山晚期的产物,为长江中下游成矿带内发现的一个较早的中酸性含矿侵入体。对于该成矿岩体及矿床的深入研究,将为区内燕山期岩浆活动及成矿提供一个不可多得的范例。岩石属于高钾钙碱性、钙碱性系列,地球化学特征显示为埃达克质岩;矿区矿石金属硫化物以方铅矿、闪锌矿、黄铜矿和黄铁矿为主,非金属矿物有透辉石、石榴石、透闪石、石英、钠长石、方解石、绿泥石和绿帘石等。矿区侵入岩主要由闪长岩和闪长玢岩组成,总体上具有高的全碱含量,低的Al2O3、TiO 2、Fe2O3^T和P2O5含量,富集大离子亲石元素(U、Rb、Sr)和高场强元素(Nb、Ta、Ti),轻稀土富集、重稀土亏损。岩石具有高的La/Yb、Sr/Y比值,低的Yb、Y含量,属于埃达克质岩。锆石稀土元素配分图显示典型的轻稀土亏损、重稀土富集。锆石Ti温度计表明岩石形成的平均温度为674.3℃。全岩Sr-Nd-Pb同位素特征表明岩石起源于俯冲洋壳的部分熔融。矿石黄铁矿δ34 S变化范围为7.6‰~9.6‰,表明成矿物质来源于岩浆热液和地层。锆石Eu异常特征和Ce^4+/Ce^3+比值表明形成岩石的岩浆具有高氧逸度,这有利于Cu、Au、Zn等成矿物质的迁移。结合区域地质背景,我们认为宝树尖矽卡岩型矿床的形成过程是:燕山期太平洋板块向中国东部俯冲,导致板片部分熔融产生埃达克质岩浆,最后经埃达克质岩浆分异形成的含矿气水热液在地壳浅部与上覆寒武系灰岩发生接触交代作用。

关键词：宝树尖多金属矿床安庆贵池矿集区埃达克岩锆石U-Pb定年 Sr-Nd-Pb同位素俯冲洋壳长江中下游

Characterization of Electrochromic Properties of Polyaniline Thin Films Electropolymerized in H₂SO₄ Solution

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Open Journal of Organic Polymer Materials 2016年第1期6卷 30-37页

作者： Dang hai Ninh Tran Thi Thao Pham Duy Long nguyen Nang Dinh University of Engineering and Technology Vietnam National University Hanoi Hanoi Vietnam Institute of Materials Science Vietnamese Academy of Science and Technology Hanoi Vietnam

Polyaniline (PANI) onto indium-doped tin-oxide (ITO)-coated glass samples were prepared by electroopolymerization in 0.5 M H2SO4 solution. Structure and morphology characterization of the PANI films demonstrated that the films were grown onto ITO substrates in the form of polycrystalline microbelts separated by micropores. By analysing the UV-Vis absorption spectra of the PANI films, the energy bandgap was found to be approximately 2.75 eV. The PANI/ITO films exhibited a good reversible electrochromic display (ECD) performance when cycled in 0.1 M LiClO4 + pro-pylene carbonate. The response time of the ECD coloration was found to be as small as 15 s and the coloration efficiency was found to be 8.85 cm2 C-1. After 100 cycles of the ECD performance, the cyclic voltammetry curve of the working electrode maintained unchanged. This demonstrates that the electropolymerized PANI films can be served as a good candidate for ECD applications, taking advantage of their excellent properties in terms of chemical stability.

关键词： Polyaniline Thin Films UV-Vis Absorption Electrochromic Property

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越南可再生能源潜力评估(英文)

越南可再生能源潜力评估(英文)

The Basis for Design and Manufacture of a DSP-Based Coincidence Spectrometer

北京论坛（2008）文明的和谐与共同繁荣——文明的普遍...

作者： Luu Duc hai nguyen Thi Ha Tran Nghi Faculty of Environmental Sciences Vietnam National UniversityHanoi Faculty of Geology Vietnam National UniversityHanoi

Renewable energy potential in Vietnam is significantly high,majorities are Hydropower and small-scaled hydropower;Biomass energy;Wind power;Solar energy;and Geo-thermal energy. The report presents the overview of Vietnam energy potential,the current energy system,the demand and projection of energy in the period of 2010-2020,environmental issues concerning exploitation and energy consumption in the period of 2010-2020.

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Journal of Analytical Sciences, Methods and Instrumentation 2013年第3期3卷 152-157页

作者： nguyen Xuan hai Pham Ngoc Tuan nguyen Nhi Dien Dang Lanh Tuong Thi Thu Huong Pham Dinh Khang Nuclear Research Institute Dalat Vietnam Nuclear Research Institute Dalat Vietnam 2Nuclear Training Center Hanoi Vietnam Nuclear Research Institute Dalat Vietnam 2Nuclear Training Center Hanoi Vietnam. Nuclear Training Center Hanoi Vietnam

The coincidence technique and the coincidence spectroscopy have been developed and applied for over 40 years. Most of popular coincidence measurement systems were based on analog electronics techniques such as time to amplitude conversion (TAC) or logic selecting coincidence unit. The above-mentioned systems are relatively cumbersome and complicated to use. With the strong growth of digital electronics techniques and computational science, the coincidence measurement systems will be constructed simpler but more efficient with the sake of application. This article presents the design principle and signal processing of a simple two-channel coincidence system by a technique of digital signal processing (DSP) using Field Programmable Gate Arrays (FPGA) devices at Nuclear Research Institute (NRI), Dalat.

关键词： Coincidence Spectrometer Digital Signal Processing FPGA

Invariant Lighting Hand Posture Classification

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Invariant Lighting Hand Posture Classification

Application of Rough Set, GSM and MSM to Analyze Learning Outcome—An Example of Introduction to Education

The 2010 IEEE International Conference on Progress in Informatics and Computing

作者： Thi-Thanh-hai Tran Thi-Thanh-Mai nguyen MICA International Research Center Hanoi University of Science and Technology VietNam

＜正＞Hand posture classification is a key problem for many human computer interaction ***,this is not a simple *** this paper,we propose to decompose the hand posture classification problem into 2 *** the first step,we detect skin regions using a very fast algorithm of color segmentation based on thresholding *** segmentation is robust to lighting condition thank to a step of color normalization using neural *** the second step, each skin region will be classified into one of hand posture class using Cascaded Adaboost *** contributions of this paper are:（i） By applying a step of color normalization,the posture classification rate is significantly improved under varying lighting condition;（ii） The cascaded Adaboost technique has been studied for the problem of face detection（2 classes）.In this paper, it will be studied and evaluated in more detail in a problem of classification of hand postures（multi-classes）.

关键词： Hand posture classification Cascaced Adaboost Color normalization Neural network Lighting invariance

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Journal of Intelligent Learning Systems and Applications 2016年第1期8卷 23-38页

作者： Hui-Chung Ho Woody Jann-Der Fann Hsiu-Jye Chiang Phung-Tuyen nguyen Duc-Hieu Pham Phuoc-hai nguyen Masatake Nagai Retired National Taichung University of Education Taiwan Ling-Tung University Taiwan National United University Taiwan Kien Giang Teacher Training College Rach Gia Vietnam Hanoi Pedagogical University 2 Xuan Hoa Vietnam Retired Teikyo University Tokyo Japan

Introduction to education is one of the basic courses in teacher education professional education, it covers a wide range of subjects. Thus, in order to practice the management teaching goals, the interdisciplinary developed mathematical tools are applied for the study. The participants of this study are students in course of introduction to education, and the research instruments applied are rough set, grey structural modeling (GSM), and matrix based-structural modeling (MSM). The purposes of this paper are: 1) To logically analyze educational datasets to practice the scientific traits in education;2) To benefit from directed hierarchical analysis to identify and propose action planning;3) To construct core-oriented educational structure as the criterion-reference for one-lesson-multiple-design and to provide the whole scope and visualized analysis with GSM and MSM.

关键词： Introduction to Education Rough Set GSM MSM One-Lesson-Multiple-Design

Responses of Native Tree Species to Soil Water Stress in a Tropical Forest on Limestone,Vietnam

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Open Journal of Forestry 2015年第7期5卷 711-722页

作者： Le Van Binh nguyen Van Thinh Reinhard Kopp Vo Dai hai Ralph Mitlohner Department of Tropical Silviculture and Forest Ecology Georg-August-Universitat GottingenGottingenGermany Vietnamese Academy of Forest Sciences Ha NoiVietnam

Forests over limestone in the tropics have received little attention and limestone forests in Vietnam have been overlooked to an even greater extent in terms of tree physiology. In Ba Be National Park, Vietnam, soil water availability in limestone forests seems to be the most limiting factor in the dry season. Therefore, in order to enhance the preliminary knowledge of choosing native tree species for enrichment planting in the restoration zone, characteristics of the 20 native tree species to soil water stress were investigated in a limestone forest. One-ha plot each consisting of twenty-five 20 m × 20 m plots was established in undisturbed forests. All trees ≥ 10 cm DBH were measured in 20 m × 20 m plots, while twenty-five 5 m × 5 m subplots were established in order to sample the regeneration of tree species with a DBH < 10 cm. The Scholander apparatus and freezing point osmometry were used in order to measure the leaf water potential (Ψw) and leaf osmotic potential (Ψπ) of the 20 native tree species, respectively in this study. 61 species belonging to 34 families of all trees with a DBH ≥ 10 cm were recorded in one ha, while 31 species representing 18 families of trees < 10 cm DBH were identified in 625 m2. The 20 species’ leaf water and osmotic potential values revealed significant differences among species. The maximum leaf water potential was not affected by any anticipated sources of variation, while the minimum water potential, however, showed significant variation to soil water stress. The results in the study area emphasized the importance of water factors in influencing tree species distribution;it could be concluded that native species with wide water potential ranges would be better able to withstand water changes and might be thus good candidates for reforestation (enrichment planting) in limestone areas.

关键词： Tropical Limestone Forests Floristic Composition Native Tree Species Leaf Water Potential Leaf Osmotic Potential