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Application of Livelihood Vulnerability Index to Assess Risks from Flood Vulnerability and Climate VariabilitymA Case Study in the Mekong Delta of Vietnam

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Journal of Environmental Science and Engineering(A) 2013年第8期2卷 476-486页

作者： nguyen Duy Can Vo Hong tu Chu Thai Hoanh Department of Rural Socio-Economics College of Rural Development Can Tho University Can Tho Vietnam Southeast Asia Regional Office IWMI (International Water Management Institute) Lao PDR Vientiane

An Giang province in the Mekong Delta is the most vulnerable province the impact of flooding and climate variability. Thousand of households are at risk due to severe annual floods. This study applied the LVI （livelihood vulnerability index） to estimate flood vulnerability of Phu Huu and Ta Danh villages in An Giang province. Data on socio-demographics, livelihoods, health, social networks, physical, financial and natural resources, natural disasters and climate variability were collected from a survey of 120 households in each village. From these data the LVI of each village was calculated. Results show that the overall LV1 of Phu Huu village, located in the early flooded zone, is higher than that of Ta Danh village, located in the late flooded zone. The analysis also indicated that this practical method can be applied for other purposes such as to monitor vulnerability, evaluate development programs or policy effectiveness by incorporating with scenario comparison.

关键词： An Giang province Mekong Delta livelihood vulnerability index flood and climate variability.

软木塞基碳量子点的水热合成及其生物相融荧光成像应用

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新型炭材料 2022年第3期37卷 595-602页

作者： Quang Ngo Khoa Hieu nguyen Ngoc Bao Vo Van Quoc Phuoc Vo Thi Ngoc Le Xuan Diem Doc Luong Quang Tri nguyen Minh Son Le Vu Truong Son Le Van Thanh Ha Che Thi cam University of Sciences Hue University77 Nguyen HueHueVietnam Faculty of Environmental and Natural Sciences Duy Tan UniversityDa Nang550000Vietnam Institute for Research and Training in Medicine Biology and PharmacyDuy Tan UniversityDa Nang550000Vietnam University of Agriculture and Forestry Hue University102 Phung HungHueVietnam University of Science and Education The University of Da Nang459 Ton Duc ThangLien ChieuDa NangVietnam

以废弃酒瓶软木塞为原料,采用低成本、简单的水热方法合成碳量子点。通过TEM、FTIR、Raman、UV-Vis、PL光谱对碳量子点的结构和光学性能进行分析表征。结果表明,碳量子点的平均直径为6.2±2.7 nm,PL激发谱和碳量子点表面的官能团有关。... 详细信息

以废弃酒瓶软木塞为原料,采用低成本、简单的水热方法合成碳量子点。通过TEM、FTIR、Raman、UV-Vis、PL光谱对碳量子点的结构和光学性能进行分析表征。结果表明,碳量子点的平均直径为6.2±2.7 nm,PL激发谱和碳量子点表面的官能团有关。用硫酸奎宁作为参考,碳量子点的量子效率为1.54%。将获得的碳量子点应用在骨髓间充质干细胞的细胞生物成像上,发现用碳量子点处理后,骨髓间充质干细胞分别在320~380 nm、450~490 nm和450~490 nm范围显示绿色、黄色和红色荧光,表明了碳量子点在荧光成像领域具有潜在的应用价值。

关键词：碳点水热合成荧光荧光图像废酒瓶塞

Comparative study on water-soluble inorganic ions in PM2.5 from two distinct climate regions and air quality

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Journal of Environmental Sciences 2020年第2期32卷 349-360页

作者： Duong Huu Huy Le tu Thanh To Thi Hien Norimichi Takenaka Faculty of Food Science and Technology Ho Chi Minh City University of Food Industry140 Le Trong Tan StreetTan Phu DistrictHo Chi Minh CityViet Nam Faculty of Environment University of ScienceVietnam National University–Ho Chi Minh City227 Nguyen Van Cu StreetDistrict 5Ho Chi Minh CityViet Nam Graduate School of Humanities and Sustainable System Sciences Osaka Prefecture University1-1 Gakuen-choNaka-kuSakai-shiOsaka 599-8531Japan

Recently, air quality has significantly improved in developed country, but that issue is of concern in emerging megacity in developing *** this study, aerosols and their precursor gas were collected by NILU filter pack at two distinct urban sites during the winter and summer in Osaka, Japan and dry and rainy seasons in Ho Chi Minh City(HCMC),*** aims are to investigate the contribution of water-soluble inorganic ions(WSIIs) to PM2.5, thermodynamic characterization and possible formation pathway of secondary inorganic aerosol(SIA).The PM2.5 concentration in Osaka(15.8 μg/m^3) is lower than that in HCMC(23.0 μg/m^3), but the concentration of WSIIs in Osaka(9.0 μg/m^3) is two times higher than that in HCMC(4.1 μg/m^3).Moreover, SIA including NH4^+, NO3^-and SO4^2-are major components in WSIIs accounting for 90% and 76%(in molar) in Osaka and HCMC,*** models were used to understand the thermodynamic characterization of urban ***, statistical analysis results indicate that very good agreement(R2> 0.8) was found for all species, except for nitrate aerosol in *** found that when the crustal species present at high amount, those compositions should be included in model calculation(*** the HCMC situation).Finally, we analyzed the characteristics of NH4^+– NO3^-– SO4^2-system.A possible pathway to produce fine nitrate aerosol in Osaka is via the homogeneous reaction between NH3 and HNO3, while nonvolatile nitrate aerosols can be formed by the heterogeneous reactions in HCMC.

关键词： Water-soluble inorganic ions Thermodynamic model PM2.5

Predicting rock size distribution in mine blasting using various novel soft computing models based on meta-heuristics and machine learning algorithms

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Geoscience Frontiers 2021年第3期12卷 458-472页

作者： Chengyu Xie Hoang nguyen Xuan-Nam Bui Yosoon Choi Jian Zhou Thao nguyen-Trang School of Environment and Resources Xiangtan UniversityXiangtan 411105China Institute of Research and Development Duy Tan UniversityDa Nang 550000Viet Nam Department of Surface Mining Mining FacultyHanoi University of Mining and Geology18 Pho VienDuc Thang wardBac Tu Liem districtHanoi 100000Viet Nam Center for Mining Electro-Mechanical researchHanoi University of Mining and Geology18 Pho VienDuc Thang wardBac Tu Liem districtHanoi 100000Viet Nam Department of Energy Resources Engineering Pukyong National UniversityBusan 48513Republic of Korea School of Resources and Safety Engineering Central South UniversityChangsha 410083HunanChina Division of Computational Mathematics and Engineering Institute for Computational ScienceTon Duc Thang UniversityHo Chi Minh City 700000Viet Nam Faculty of Mathematics and Statistics Ton Duc Thang UniversityHo Chi Minh City 700000Viet Nam

Blasting is well-known as an effective method for fragmenting or moving rock in open-pit *** evaluate the quality of blasting,the size of rock distribution is used as a critical criterion in blasting operations.A high percentage of oversized rocks generated by blasting operations can lead to economic and environmental ***,this study proposed four novel intelligent models to predict the size of rock distribution in mine blasting in order to optimize blasting parameters,as well as the efficiency of blasting operation in open ***,a nature-inspired algorithm(i.e.,firefly algorithm-FFA)and different machine learning algorithms(i.e.,gradient boosting machine(GBM),support vector machine(SVM),Gaussian process(GP),and artificial neural network(ANN))were combined for this aim,abbreviated as FFA-GBM,FFA-SVM,FFA-GP,and FFA-ANN,***,predicted results from the abovementioned models were compared with each other using three statistical indicators(e.g.,mean absolute error,root-mean-squared error,and correlation coefficient)and color intensity *** developing and simulating the size of rock in blasting operations,136 blasting events with their images were collected and analyzed by the Split-Desktop *** which,111 events were randomly selected for the development and optimization of the ***,the remaining 25 blasting events were applied to confirm the accuracy of the proposed ***,blast design parameters were regarded as input variables to predict the size of rock in blasting ***,the obtained results revealed that the FFA is a robust optimization algorithm for estimating rock fragmentation in bench *** the models developed in this study,FFA-GBM provided the highest accuracy in predicting the size of fragmented *** other techniques(i.e.,FFA-SVM,FFA-GP,and FFA-ANN)yielded lower computational stability and ***,the FFA-GBM model can be used as a powerful

关键词： Mine blasting Rock fragmentation Artificial intelligence Hybrid model Gradient boosting machine Meta-heuristic algorithm

Comparison of Sensory Characteristics of Green Tea Produced in Thai nguyen and Phu Tho Province, Vietnam

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Journal of Food Science and Engineering 2014年第2期4卷 107-114页

作者： Dang Thi Minh Luyen Ha Duyen tu Philippe Lebailly nguyen Duy Thinh tu Viet Phu Department of Quality Management School of Biotechnology and Food Technology Hanoi University of Science and TechnologyHanoi 10000 Vietnam Department of Agricultural Sciences University of Liege Gembloux 5030 Belgium

Green tea is a popular product with a high consumption in Vietnam. Moreover, green tea produced in Tan Cuong commune, Thai nguyen province, has long been recognized for its superior quality to those coming from other regions of the country. This study aims at comparing the tea from Thai nguyen and Phu Tho and finding out if the difference can be identified through sensory analysis. Two products picked from Tan Cuong, Thai nguyen province, and two others from Phu Ho district, Phu Tho province were evaluated by a trained panel of 12 judges （11 women and 1 man）. The sensory evaluation of the dry tea （11 descriptors） was carried out separately from the brewed tea （21 descriptors） and brewed leaf （five descriptors） using an unstructured intensity scale （10 cm）. Statistic analyses have shown differences between regions in all three groups of attributes： dry leaf, liquor and brewed leaf.

关键词： Green tea sensory analysis.

Estimation of Tropical Forest Structural Characteristics Using ALOS-2 SAR Data

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Advances in Remote Sensing 2016年第2期5卷 131-144页

作者： Luong Viet nguyen Ryutaro Tateishi Hoan Thanh nguyen Ram C. Sharma tu Trong To Son Mai Le Center for Environmental Remote Sensing Chiba University Chiba Japan Space Technology Institute Vietnam Academy of Science and Technology Hanoi Vietnam Institute of Geography Vietnam Academy of Science and Technology Hanoi Vietnam

The potential of ALOS-2 SAR data for the estimation of tropical forest structural characteristics was assessed in Vietnam by collecting forest inventory data. The effect of polarization and seasonality of the SAR data on the estimation of forest biomass was analyzed. The combination of HH, HV, and HH/HV polarizations using multiple linear regression did not improve the estimation of biomass compared to using the HV channel independently, as the HH and HH/HV variables were not statistically significant. The dry season HV backscattering intensity was highly sensitive to the biomass compared to the rainy season backscattering intensity. The SAR data acquired in the rainy season with humid and wet canopies was not very sensitive to the biomass. The strong dependence of the biomass estimates with the season of SAR data acquisition confirmed that the choice of right season SAR data is very important for improving the satellite based estimates of the biomass. The validation results showed that the dry season HV polarization could explain 54% variation of the biomass.

关键词： Forest Structure Forest Biomass SAR ALOS-2 Backscattering Intensity Sensitivity Analysis

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越南学生汉语招呼语习得研究

越南学生汉语招呼语习得研究

作者：甘秀珍（cam tu Tran）杭州师范大学

学位级别：硕士

语言是人类最卓越、最重要的交流方式。通过语言,每个人都可以与他人交换信息、建立关系并进行互动。然而,在我们真正交流之前,我们必须找到一种方式来发起交流,引起对方的注意,所以我们必须向对方打招呼。可以肯定的是,打招呼是第一礼... 详细信息

语言是人类最卓越、最重要的交流方式。通过语言,每个人都可以与他人交换信息、建立关系并进行互动。然而,在我们真正交流之前,我们必须找到一种方式来发起交流,引起对方的注意,所以我们必须向对方打招呼。可以肯定的是,打招呼是第一礼仪,是每个人在交流时最底限的礼貌行为。招呼语不仅是一种简单的沟通方式,也是衡量每个人语言水平的标准之一。因此,汉语招呼语的相关研究将对跨文化交际十分重要。作为一名越南留学生,在学习汉语的过程中,笔者深有感触。本文借鉴前人的研究,结合搜集到的资料进行研究。论文以越南汉语学习者为调查对象,采用调查问卷的方法并利用SPSS(20.0)和Excel数据分析软件分析了越南留学生招呼语的习得情况。在得出有效的调查结果后,归纳越南学生汉语招呼语习得的偏误成因,从而提出针对性的教学策略,让学生们通过汉语课能有效地习得汉语招呼语,更好地培养学习者的汉语交际能力。论文的具体研究内容共有五个部分:第一章是绪论,主要阐述本论文的选题背景、研究目的、研究意义以及研究方法与内容,同时对相关文献进行梳理、阐述。第二章是论文的理论依据,主要涉及汉语招呼语的分类及特点。第三章是调查研究与分析,主要包括越南学习者使用汉语招呼语调查问卷设计情况、调查情况、调查结果和分析。第四章是越南学生习得汉语招呼语的偏误类型、成因分析及建议。最后一部分是对全文的回顾与总结。从调查结果可见,越南学生在跨文化交际中,常因不理解汉语招呼语的内涵或语境认知偏差,产生一系列的招呼语方面的语用偏误,致使交际中的障碍难以去除。论文总结了越南学生习得汉语过程中的常见问题和偏误,以及帮助越南学习者在与中国人交流时,选择最合适的招呼语,同时也为越南的汉语教学提供一些参考意见。

关键词：招呼语越南学生习得偏误

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越南传统文化元素在啤酒广告中的运用研究

越南传统文化元素在啤酒广告中的运用研究

作者：段氏锦秀（DOAN THI cam tu）湖南大学

学位级别：硕士

如今社会,世界上绝大多数的国家都清楚地认识到经济与文化的重要性,文化的发展创造了物质和精神价值,影响了社会的整体发展,其中对经济的发展影响尤为明显。近年来的现实情况表明,为了在市场上占有一席之地,许多企业开始重视将文化元素... 详细信息

如今社会,世界上绝大多数的国家都清楚地认识到经济与文化的重要性,文化的发展创造了物质和精神价值,影响了社会的整体发展,其中对经济的发展影响尤为明显。近年来的现实情况表明,为了在市场上占有一席之地,许多企业开始重视将文化元素应用于广告作品和产品促销活动以便使产品留下较为深刻的印象,其中也包含啤酒企业。本文主要对越南的四家啤酒公司的广告作品运用文献分析法和内容分析法,已经收集了共计95条,其中运用了越南传统文化元素的样本数量82条。经过详细的研究和分析,可将越南传统文化元素分为传统观念元素,风俗元素,宗教信仰元素和艺术元素四类。在抽样调查后发现,越南传统文化被广泛用于许多主题的啤酒广告中,啤酒广告合理地进行传统文化元素的运用,能够有助于产品更加贴近消费者,有效地增强广告效果,同时创造传播文化的良好价值并产生有益的社会影响。由于,啤酒本质上是进口产品,文化元素可以为啤酒广告树立艺术观念,塑造高端品质感,以此增加品牌对客户购买行为的影响力;对于越南传统文化本身而言,有助于传统元素与现代文化的融合,从而促进其发展和传播。研究为啤酒广告广告中越南传统文化元素的运用情况提供了数据参考,分析了越南传统文化元素在啤酒广告中的运用、尚存的问题与解决对策。但是,啤酒广告市场目前已经饱和,广告作品往往走旧路,创新思想和运用传统文化元素都没有突破,误用越南传统文化元素。针对这些问题,笔者提出了相应的解决对策:挖掘传统文化元素与啤酒广告传达的切合点,啤酒广告运用传统文化元素必须表达越南的民族精神,围绕广告诉求运用合适的传统文化元素。只有在商业广告合理运用越南传统文化元素的前提下,越南传统文化的源远流长和博大精深才能在广告中完全发挥出来,为两者带来双赢的结果。

关键词：越南文化传统文化元素啤酒广告

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完善越南企业所得税立法的思考

完善越南企业所得税立法的思考

作者：黎氏锦绣(Le Thi cam tu) 华南理工大学

学位级别：硕士

中国和越南都是社会主义的国家,两国在政治体制、文化传统和社会制度,尤其在法律制度建设等的方面,存在着一定的相似性。从两国改革开放的时间来看,中国改革开放比越南更早,经济发展得更快,科技水平更高,立法技术更为先进。越南在自改... 详细信息

中国和越南都是社会主义的国家,两国在政治体制、文化传统和社会制度,尤其在法律制度建设等的方面,存在着一定的相似性。从两国改革开放的时间来看,中国改革开放比越南更早,经济发展得更快,科技水平更高,立法技术更为先进。越南在自改革开放以来,越南的法制建设中,参考并借鉴世界许多国家,特别是中国的经验。因此,在两国企业所得税立法领域有着很多相似的规定,当然,由于两国的国情有所不同中越企业所得税法律制度也存在不少的差异。近几年来,中国和越南的关系,特别是两国的贸易与投资关系,发展得更加密切。对两国政府或投资者来说,加强对中国和越南企业所得税法的比较与研究真有十分重要的作用,且在客观上也存在着必要性。所以,本人选择了“完善越企业所得税立法的思考”作为我的毕业论文题目,旨在为完善越南企业所得税立法提供一些有益的建议。作为一名越南留学生来中国留学,在经济法学专业研究生求学期间开始关注于两国企业所得税法的比较研究,并将作为学位论文进行研究,形成论文。主要的研究是就根据中国和越南企业所得税法规进行研究,分析,比较两国企业所得税的优与缺点,然后提出中国企业所得税法对越南的启示为了完善越南企业所得税法的建议。本论文分为四章。第一章是绪论,通过参考较多学者在国内外税法和企业所得税法的研究,分析,比较提出了本论文的研究意义、思路和方法。第二章主要介绍越南改革开放以来企业所得税法的发展、在经济发展中发挥了较多积极作用同时提出了一些存在的问题。第三章,主要在中国企业所得税法的优点,并对统一内外资企业所得税、税收优惠、税前扣除等几个方面作为完善越南企业所得税法的启示。第四章提出了中越企业所得税法的一些基本差异,同时借鉴中国的经验来完善越南企业所得税法的建议。最后是结论。

关键词：中国与越南企业所得税法存在问题完善建议