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Improved flood susceptibility mapping using a best first decision tree integrated with ensemble learning techniques

Geoscience Frontiers 2021年第3期12卷 333-342页

作者： Binh Thai pham Abolfazl Jaafari Tran Van Phong Hoang Phan Hai Yen Tran thi Tuyen Vu Van Luong Huu Duy Nguyen Hiep Van Le Loke Kok Foong University of Transport Technology Ha Noi 100000Viet Nam Research Institute of Forests and Rangelands Agricultural ResearchEducation and Extension Organization(AREEO)TehranIran Institute of Geological Sciences Vietnam Academy of Sciences and Technology84 Chua Lang StreetDong daHa NoiViet Nam Department of Geography School of Social EducationVinh UniversityViet Nam Department of Resource and Environment Management School of Agriculture and ResourcesVinh UniversityViet Nam Faculty of Geography VNU University of Science334 Nguyen TraiHa NoiViet Nam Institute of Research and Development Duy Tan UniversityDa Nang 550000Viet Nam Department for Management of Science and Technology Development Ton Duc Thang UniversityHo Chi Minh CityViet Nam Faculty of Civil Engineering Ton Duc Thang UniversityHo Chi Minh CityViet Nam

Improving the accuracy of flood prediction and mapping is crucial for reducing damage resulting from flood *** this study,we proposed and validated three ensemble models based on the Best First Decision Tree(BFT)and the Bagging(Bagging-BFT),Decorate(Bagging-BFT),and Random Subspace(RSS-BFT)ensemble learning techniques for an improved prediction of flood susceptibility in a spatially-explicit manner.A total number of 126 historical flood events from the Nghe An Province(Vietnam)were connected to a set of 10 flood influencing factors(slope,elevation,aspect,curvature,river density,distance from rivers,flow direction,geology,soil,and land use)for generating the training and validation *** models were validated via several performance metrics that demonstrated the capability of all three ensemble models in elucidating the underlying pattern of flood occurrences within the research area and predicting the probability of future flood *** on the Area Under the receiver operating characteristic Curve(AUC),the ensemble Decorate-BFT model that achieved an AUC value of 0.989 was identified as the superior model over the RSS-BFT(AUC=0.982)and Bagging-BFT(AUC=0.967)models.A comparison between the performance of the models and the models previously reported in the literature confirmed that our ensemble models provided a reliable estimate of flood susceptibilities and their resulting susceptibility maps are trustful for flood early warning systems as well as development of mitigation plans.

关键词： Machine learning Ensemble learners Hybrid modeling

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鲁迅作品在越南文化界的翻译、接受与影响研究

鲁迅作品在越南文化界的翻译、接受与影响研究

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作者：范氏芳莲（pham thi PHUONG lien）华侨大学

学位级别：硕士

中国现代文学作家当中,鲁迅是被传播到越南的第一位,也是被越南普通高校选择其作品作为教材的唯一的一位。鲁迅得到了越南人民的喜爱与敬仰,其越南读者日益增多。越南人喜爱鲁迅不仅因为他是越中两国文学交往的主要桥梁,而且还因为他的... 详细信息

中国现代文学作家当中,鲁迅是被传播到越南的第一位,也是被越南普通高校选择其作品作为教材的唯一的一位。鲁迅得到了越南人民的喜爱与敬仰,其越南读者日益增多。越南人喜爱鲁迅不仅因为他是越中两国文学交往的主要桥梁,而且还因为他的作品与越南人民的解放事业息息相关。鲁迅在越南的传播与影响极为深刻,他在越南文学事业上占有举足轻重的地位。本论文希望通过研究鲁迅所创作的文学作品在越南的文学领域从翻译、接受到研究的情况,来探讨鲁迅文学对于越南文学产生的影响,进一步证明伟大的作家鲁迅不仅属于中国人民,同时也属于全世界的人民。

关键词：鲁迅作品文学精神越南文化界南高

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Hepatitis B vaccination status and associated factors among health science students

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Asian Pacific Journal of Tropical Medicine 2023年第5期16卷 213-219页

作者： Binh Thanh Nguyen Lan Y Vo Tap Van Nguyen Minh Cong Vo Tinh Dang pham Han thi Ngoc Nguyen Lynda Boyer-Chu Giao Huynh Faculty of Medicine Tra Vinh UniversityTra Vinh CityTra Vinh ProvinceVietnam Faculty of Public Health University of Medicine and Pharmacy at Ho Chi Minh CityHo Chi Minh CityVietnam Faculty of Medical Management Nguyen Tat Thanh UniversityHo Chi Minh CityVietnam Department of Ear Nose Throat-Head and Neck Surgery FV hospitalHo Chi Minh CityVietnam Department of Anaesthesia and Intensive Care FV hospitalHo Chi Minh CityVietnam Infection Control Department University Medical Center Ho Chi Minh CityHo Chi Minh CityVietnam San Francisco Unified School District San FranciscoCaliforniaUSA

Objective:To evaluate hepatitis B virus(HBV)vaccine coverage and its associated factors among health science students in ***:this cross-sectional study involving 459 health science students at Tra Vinh University was conducted between April and June *** were collected using a structured questionnaire with items on sociodemographic characteristics,knowledge and attitude about HBV,and vaccination status.A multivariable logistic regression model was used to explore the factors associated with vaccination ***:The majority of participants were female(65.8%)and enrolled at the medical school(56.2%).A total of 30.3%participants received the full dose of the HBV *** percentages of participants with sufficient knowledge and positive attitudes toward HBV infection were 75.2%and 43.4%,*** was 11.8 times higher in sixth-year medical students than any healthcare student in their first-year[adjusted odds ratio(aOR)11.8,95%CI 3.1-45.1,P<0.001],and the coverage was also significant higher in those who had sufficient knowledge(aOR 2.0,95%CI 1.1-3.9,P<0.05)and positive attitudes(aOR 3.0,95%CI 1.9-4.8,P<0.05)than in their ***:The majority of students were not fully vaccinated against HBV,indicating they were vulnerable to the *** and authorities should reinforce health education messages aimed at encouraging all students to get vaccinated with the HBV vaccine,enhance their awareness and knowledge of HBV,and improve attitudes toward HBV infection prevention.

关键词： Hepatitis B Knowledge Attitude Practice Vaccination Students

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Influence of different land-use types on selected soil properties related to soil fertility in A Luoi District,Thua thien Hue,Vietnam

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Soil Ecology Letters 2024年第1期6卷 131-140页

作者： Khoa Phuc Nguyen Tan Trong Tran Huy Dinh Le Phuong Thuy Nguyen Hien Thao thi pham Dien Thanh Nguyen Ngu Huu Nguyen University of Agriculture and Forestry Hue UniversityHue CityThua Thien Hue 52000Vietnam School of Biotechnology Tan Tao UniversityTan Duc ECityDuc HoaLong An850000Vietnam

Land use type affects the physicochemical properties of *** value of OM and TN is high in acacia *** acidity of soil is considered a serious constraint for *** cash crops are acacia,cassava,banana,rice and *** fertility is affected by land-use types and land management,which exacerbates soil erosion and various other forms of soil degradation in the mountainous regions of *** study was conducted in A Luoi District,Thua thien Hue,Vietnam to identify the effects of land-use types on specific soil physicochemical characteristics related to soil *** physicochemical properties,such as organic matter(OM),total nitrogen(TN),total phosphorous(TP),and K+were significantly affected by land-use *** results showed that the soils were sandy in rice but clay loam for acacia and *** mean bulk density value of acacia soil was significantly greater than that of other *** were higher in the acacia soils than those in the rice,maize,and banana *** OM content was significantly higher in the acacia,cassava,and banana soils than those in the rice and maize *** mean of exchangeable K+in the rice soil was higher compared to those in other soils and was affected by land-use *** high exchangeable acidity content in the soils was probably due to intensive ***,both land use type and management did not affect the CEC ***,the inappropriate land use caused the disturbance of soil physicochemical properties,indicating that the conditions of rice and maize soils are becoming worse than acacia ***,lowering the intensity of cultivation,adopting incorporated soil fertility management,and applying organic fertilizer should preserve the existing conditions and enhance soil properties.

关键词： Land-use types soil characteristics soil frility suitable crop Vietnam

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Ecoregional variations of aboveground biomass and stand structure in evergreen broadleaved forests

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Journal of Forestry Research 2020年第5期31卷 1713-1722页

作者： Tran Van Do Mamoru Yamamoto Osamu Kozan Vo Dai Hai Phung Dinh Trung Nguyen Toan Thang Lai Thanh Hai Vu Thanh Nam Trieu Thai Hung Hoang Van Thang Tran Duc Manh Cao Chi Khiem Vu Tien Lam Nguyen Quang Hung Tran Hoang Quy pham Quang Tuyen Trinh Ngoc Bon Nguyen thi Thu Phuong Ninh Viet Khuong Nguyen Van Tuan Dang thi Hai Ha Tran Hai Long Dang Van Thuyet Dang thinh Trieu Nguyen Van thinh Tran Anh Hai Duong Quang Trung Nguyen Van Bich Dinh Hai Dang pham Tien Dung Nguyen Huy Hoang Le thi Hanh Phan Minh Quang Nguyen thi Thuy Huong Hoang Thanh Son Nguyen Thanh Son Nguyen thi Van Anh Nguyen thi Hoai Anh pham Dinh Sam Hoang thi Nhung Hoang Van Thanh Nguyen Huu thinh Tran Hong Van Ho Trung Luong Bui Kieu Hung Research Institute for Sustainable Humanosphere Kyoto UniversityUjiKyotoJapan Silviculture Research Institute Vietnamese Academy of Forest SciencesNorth Tu LiemHanoiVietnam Center for Southeast Asian Studies Kyoto UniversityKyotoJapan Vietnamese Academy of Forest Sciences North Tu LiemHanoiVietnam Vietnam Administration of Forestry No.2 Ngoc HaBa DinhHanoiVietnam

Biotic and abiotic factors control aboveground biomass(AGB)and the structure of forest *** study analyses the variation of AGB and stand structure of evergreen broadleaved forests among six ecoregions of Vietnam.A data set of 1731-ha plots from 52 locations in undisturbed old-growth forests was *** results indicate that basal area and AGB are closely correlated with annual precipitation,but not with annual temperature,evaporation or hours of *** area and AGB are positively correlated with trees>30 cm *** areas surveyed(52.6%)in these old-growth forests had AGB of 100–200 Mg ha^-1;5.2%had AGB of 400–500 Mg ha^-1,and 0.6%had AGB of>800 Mg ha^-*** percent of the areas surveyed had stand densities of 300–600 ***^-1,and 64%had basal areas of 20–40 m^2 ha^-*** is an important factor influencing the AGB of old-growth,evergreen broadleaved forests in *** causing the loss of large-diameter trees(e.g.,>100 cm DBH)affects AGB but may not seriously affect stand density.

关键词： Aboveground biomass Carbon storage Climatic variables Ecoregion Edaphic variables Oldgrowth forest

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Research on Dyeing Process for Polyamide with Aqueous Extracted from the Fruits of Diospyros Mollis

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Journal of Environmental Science and Engineering(B) 2016年第8期5卷 385-389页

作者： Hong Phuong pham thi Linh Hoang thi TrungKien Tran Thu Lan Nguyen thi Chemical Engineering Faculty Industrial University of rio Chi Minh City HCMC 7000000 Vietnam Faculty of Technology of Textile and Fashion Hung Yen University of Technology and Education Hung Yen Province 160000Viemam School of Chemical Engineering Hanoi University of Science and Technology Ha Noi City 100000 Vietnam Faculty of Textiles and Leather University of Economic and Technical Industries Ha Noi City 100000 Vietnam

In this study, polyamide fabrics were dyed with aqueous extracts from Diospyros Mollis fruits. The aqueous extracts from Diospyros Mollis fruits were extracted with water solution at room temperature and a ratio of 1：5 for Diospyros Mollis to water. The influences of temperature in range of 50-100 ℃, time in range of 30-80 minutes and a ratio of aqueous extracts to water in range of 3/1-1/11 were investigated. The results showed that the aqueous extracts from Diospyros Mollis fruits could dye polyamide fabrics to have black color with color strength and fastness properties to be very good level of 4-5.

关键词： Polyamide natural dyes Diospyros Mollis fruit.

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Fault Diagnosis and Phase Disposition Reconfiguration of a 5-Level Double-Boost Power Factor Corrector with Fault-Tolerant Capability

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Journal of Energy and Power Engineering 2012年第3期6卷 418-424页

作者： thi Thuy Linh pham Frederic Richardeau Guillaume Gateau Plasma and Energy Conversion Lab （LAPLACE） University of Toulouse Toulouse F-31071 France Scientific Research National Center （CNRS） Toulouse F-31071 France

A 5-level PFC （power factor correction） topology with fault-diagnostic and fault-tolerant capability is proposed and compared to known structures. It is derived from a 3-level non differential double-boost PFC including fly-cap cells. The series-connection of the two low-voltage switching-cells is decoupled by a single flying capacitor that provides a direct fault-tolerant capability and a post-failure operation increasing the availability of converter. The monitoring of the voltages across flying capacitors allows a rapid detection and localization either for open circuit failure or short-circuits failure. A PWM （pulse width modulation） phase-disposition type reconfiguration is also used and presented in order to optimize both normal operation and post-fault continuation. The design and the most important features are highlighted thanks to a digital control frame and a mock-up rated to： AC voltage network 115 V-load 400 V-nominal power 4 kW-switching frequency 62 kHz.

关键词： PFC (power factor correction) multilevel converter fault tolerant capability diagnosis.

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Analysis of Factors Affecting Bad Debts at Joint Stock Commercial Banks in Vietnam

Analysis of Factors Affecting Bad Debts at Joint Stock Comme...

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作者：范氏香琼（pham thi Huong Quynh）上海财经大学

学位级别：硕士

为了解决坏账问题,管理人员需要了解银行系统中坏账增加的原因。到目前为止,世界上有很多有关此问题的研究论文。Boudriga等人(2009)的研究得出的结论是,银行体系中的坏账是,坏账的影响不仅来自银行内部,而且还受外部影响,例如商业和制... 详细信息

为了解决坏账问题,管理人员需要了解银行系统中坏账增加的原因。到目前为止,世界上有很多有关此问题的研究论文。Boudriga等人(2009)的研究得出的结论是,银行体系中的坏账是,坏账的影响不仅来自银行内部,而且还受外部影响,例如商业和制度环境的影响。等人(2011),坏账受到宏观经济的影响,特别是受国内生产总值(GDP)增长率,失业率,实际利率和公共债务的影响。但是,在越南,关于坏账问题的研究很少或很少,这导致监管机构和政策制定者难以管理银行体系中的风险,也难以提出适当的宏观经济和货币政策来稳定市场。。货币和国家的经济发展。因此,非常有必要在2011-2018年间实施“影响越南股份制商业银行坏账的因素分析”主题。

关键词： banks,credit,Vietnam,banking,loans,institutions,银行坏账,provision,equity,stock,

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复合酸联合585nm染料激光治疗寻常痤疮的临床疗效观察

复合酸联合585nm染料激光治疗寻常痤疮的临床疗效观察

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作者： pham thi Kieu Nguyet 重庆医科大学

学位级别：硕士

目的:临床上,寻常痤疮治疗方法众多,各临床医师选择治疗方法差异大,疗效亦千差万别。本研究利用复合酸(10%水杨酸和20%果酸以比例1:1组成的凝胶)联合585nm染料激光治疗寻常痤疮,观察其临床疗效以及可能存在的不良反应,最终为有效服务于... 详细信息

目的:临床上,寻常痤疮治疗方法众多,各临床医师选择治疗方法差异大,疗效亦千差万别。本研究利用复合酸(10%水杨酸和20%果酸以比例1:1组成的凝胶)联合585nm染料激光治疗寻常痤疮,观察其临床疗效以及可能存在的不良反应,最终为有效服务于临床,为寻常痤疮的治疗提供指导作用。方法:本文通过门诊随机抽取56例寻常痤疮患者,其中28例痤疮患者采用复合酸联合585nm染料激光治疗为实验组,28例患者单用585nm染料激光治疗寻常痤疮为对照组。通过统计对比治疗前以及治疗后4、8、12、16、20、24周各类皮损计数包括粉刺、丘疹、脓疱、结节、囊肿的个数得出结论。结果:随访56例痤疮患者,16例未完成试验,其中试验组6例和对照组10例。完成随访的40例寻常痤疮治疗的患者,无一例出现较严重并发症。在治疗前两组患者情况对比:年龄(26.00±6.517VS 26.39±7.461,p=0.861>0.05)、性别(女:男)(16±6VS12±6,p=0.677>0.05)、痤疮的各类皮损计数包括粉刺(P=0.422>0.05)、丘疹(P=0.427>0.05)、脓疱(P=0.892>0.05)、结节(P=0.162>0.05)、囊肿(P=0.067>0.05)均无统计学差异。对治疗前以及治疗后4、8、12、16、20、24周各类皮损计数包括粉刺、丘疹、脓疱、结节、囊肿的对比:1、实验组粉刺、丘疹的数量较对照组少,差异有统计学意义(P0.05,无统计学意义,不同实验组和时间之间无交互效应。3、囊肿不同实验组间(P=0.509>0.05),无统计学意义,故认为实验组对寻常痤疮的治疗效果和对照组间无明显优势。结论:在寻常痤疮的治疗中,实验组复合酸联合585nm染料激光较对照组单用585nm染料激光治疗寻常痤疮总体具有更好的疗效,对寻常痤疮的皮损如粉刺、丘疹、脓疱、结节的治疗均优于对照组。但对囊肿的治疗,实验组较对照组无明显优势。

关键词：痤疮复合酸染料激光

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中国企业投资越南的劳工法律风险防范

中国企业投资越南的劳工法律风险防范

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作者： pham thi LINH PHUONG 西南政法大学

学位级别：硕士

1950年1月,中国和越南建立外交关系,两国革命领导人胡志明主席和毛泽东主席高度重视发展中越两国的友好合作关系。中越两国政治、文化与社会非常相似。在过去16年中,中国一直是越南最大贸易伙伴。随着中国企业在越南投资的增加其所面临... 详细信息

1950年1月,中国和越南建立外交关系,两国革命领导人胡志明主席和毛泽东主席高度重视发展中越两国的友好合作关系。中越两国政治、文化与社会非常相似。在过去16年中,中国一直是越南最大贸易伙伴。随着中国企业在越南投资的增加其所面临的风险也越来越多,尤其是劳工方面的法律风险。因此,本文将从法律的角度分析越南的劳动法律制度,并结合中国企业在越南投资的相关案例,提出中国企业在越南投资可能存在的劳工法律风险。希望本文的研究能够在一定的程度上帮助在越南投资的中国企业提高劳工法律风险识别与防范的能力。本文一共分为四个部分,第一部分是对劳工法律风险的概念进行界定。第二部分是分析中国企业在越南投资时面临的劳工法律风险,主要的分析涉及到劳动者权利保护、本地化用工以及代表劳动者的组织相关法律风险。在分析这一部分时,本文用三个案例来强化文章的论点,包括:某中国公司通过并购方式获得越南CPVietnam企业的股权,对CPVietnam企业进行业务重组,与部分现有劳工解除劳动合同;越南嘉莱省(Gia Lai)发现中国水电国际公司使用的26名外籍员工没有劳动许可证或工作许可证豁免证明;立讯精密(越南)有限公司(Luxshare-ICT Vietnam)的5000多名员工罢工事件。第三部分是分析导致这些法律风险产生的原因。来自于东道国的角度来看,越南劳动法律制度变化频繁,执法环境不理想,越南劳工教育水平整体较低。而从企业角度分析,企业对东道国法律法规缺乏了解、部分企业不注重保护劳工权益。第四部分是在以上分析的基础上,提出一些建议,比如设立好企业的法律服务部门,遵守越南劳动用工规定;聘用当地法律人员实现“本地化”法律保护,为员工提供法律咨询服务;定期组织管理层与员工的会议;当涉及到法律纠纷的时候,应当积极配合执法人员,降低不必要的冲突。

关键词：越南海外劳动用工劳工法律风险风险防范

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