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铁道学报 2016年第6期38卷 100-107页

作者：刘宝苏谦 PHAM Duc Phong 白皓 LAM t.i Huyen hanh 西南交通大学土木工程学院四川成都610031 le Quy Don技术大学特种工程学院越南河内100803 四川高速公路建设开发总公司四川成都610041

为评估含水率变化对高速铁路无砟轨道基床表层级配碎石动力性能的影响,本文针对最优含水率和饱和含水率两种状态下级配碎石循环动力性能开展室内大型动三轴试验研究,分析级配碎石的临界动应力和累积变形特性。研究表明:累积变形与荷载... 详细信息

为评估含水率变化对高速铁路无砟轨道基床表层级配碎石动力性能的影响,本文针对最优含水率和饱和含水率两种状态下级配碎石循环动力性能开展室内大型动三轴试验研究,分析级配碎石的临界动应力和累积变形特性。研究表明:累积变形与荷载作用次数、含水率关系密切,荷载作用次数超过10 000次后,含水率的影响逐渐显现,荷载作用次数达到20 000次时,饱和含水率的累积变形相对最优含水率增大70%;不同含水率级配碎石的衰减型和破坏型累积变形曲线可分别用Stewart模型和Monismith模型预测;级配碎石临界动应力随含水率增大而减小,随围压的增大线性增大,饱和含水状态对应的临界动应力较最优含水状态平均小13%。

关键词：高速铁路级配碎石大型三轴试验不同含水率累积变形临界动应力

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农田生态沟渠效能研究

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黑龙江生态工程职业学院学报 2017年第5期30卷 5-7,68页

作者： tang Van t.i tran Ngoc Binh tang t.i thanh Sang le Hong hanh 东南大学土木工程学院江苏南京210096 Vinh Medical University Vinh University

传统混凝土沟渠主要使用浆砌石、钢筋混凝土等材料建造成排水沟渠,难以有效去除农田污水中的富营养化,引起河道污染~[1]。本实验在调查太湖运河沿岸农田的污染情况的基础上,设计并建造复合生态沟渠示范工程,然后根据季节差异种植复合的... 详细信息

传统混凝土沟渠主要使用浆砌石、钢筋混凝土等材料建造成排水沟渠,难以有效去除农田污水中的富营养化,引起河道污染~[1]。本实验在调查太湖运河沿岸农田的污染情况的基础上,设计并建造复合生态沟渠示范工程,然后根据季节差异种植复合的植物。通过观察植物生长情况研究生态沟渠的植生价值,检测生态沟渠的水质变化情况以检验农田污水富营养化的去除效能。

关键词：生态沟渠农田污水太滆运河

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Research on the Development Model of the Adaptive Housing to Flooding/High tides and Applicability to Some types of Housing in Nha Be Dist.ict,Ho Chi Minh City,Vietnam

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Journal of Civil Engineering and Architecture 2021年第12期15卷 627-640页

作者： le-Minh Ngo tan-hanh le Vinh-Nghi truong Faculty of Civil Engineering Ton Duc Thang UniversityHo Chi Minh City 700000Vietnam Faculty of Architecture University of Architecture Ho Chi Minh City196 PasteurPhường 6Quận 3Ho Chi Minh CityVietnam tieng Duc Dshi Education Consulting Service trading Company Limited Ho Chi Minh City 700000Vietnam

Ho Chi Minh City(HCMC)has a high density of rivers and canals,so it.is often strongly affected by high *** rapid urbanization process of a city with more than 13 million people,along with human activities with rivers such as accretion,river encroachment,sand mining,construction of houses close to the riverbanks,...that stop the flow of rivers and canals,causes high tides to rise quickly and recede slowly,therefore difficult to *** residential areas of people along the canals in the city are clearly affected by the phenomenon of high tides and it causes many difficulties to people’s lives,especially people living in Nha Be dist.ict-a southeast dist.ict of HCMC,where the terrain is low-lying,and also the water collection area of the whole *** is an area that.is expected to be flooded more and more heavily due to the increasingly strong impact of high *** inevitable consequence of the flooding-high tide phenomenon is that the living and business environment.is not guaranteed,people’s life quality does not.improve,and a part of the residents have to ***,how to build a housing model that adapts to flooding/high tide in Nha Be Dist.ict,HCMC against the impacts of high tides?t.is article is a qualitative study using mixed methods including Document Synthesis&Comparison,Questionnaire,interview,and Observation *** investigation,survey,and assessment on the impact of high tides on housing in Nha Be Dist.ict,HCMC was carried out.in the year *** study aims to find out the experiences in building models of houses that can adapt to flood/high tide and their applicability to some types of houses in Nha Be Dist.ict,*** solutions are aimed at.improving the quality of life of people living along the canals of Nha Be Dist.ict,HCMC and effectively cont.ibute to sust.inable socio-economic development.

关键词： Development model adaptive housing flooding high tides Nha Be dist.ict HCMC.

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Establishment of Community-Based Dissemination Model and its Effective Function for Sust.inable Food Security and Poverty Reduction

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Journal of Agricultural Science and technology(B) 2020年第2期10卷 83-88页

作者： t.i My Hoa Do t.i thuc Oanh le t.i hanh Dung Cao Nobuko Otsuki Masumi Kano Foundation for international Development/Relief(FiDR) Vietnam OfficeDa NangVietnam Foundation for international Development/Relief(FiDR) Tokyo OfficeTokyoJapan

Vietnam ranks as one of the largest rice exporters in the *** major deltas,the Mekong River Delta and the Red River Delta,cont.ibute around 70%of the country’s rice production and 90%of its rice exports,while people in the mount.inous areas of Central Vietnam still suffer from food shortage for three to four months per *** combat t.is incongruous situation,the Foundation for international Development/Relief(FiDR),a Japan-based non-governmental organization(NGO),launched a project to introduce system of rice intensification(SRi)methods and developed the community-based dissemination(CBD)*** of the difficulties that the government and aid agencies generally face is to create an effective and sust.inable dissemination model,when the newly-introduced technology is totally unfamiliar to targeted region and *** consists of 54 ethnic groups,and 14%of the population is comprised of 53 ethnic minorities,mainly living in mount.inous *** 50%of them still live below the poverty line and are threatened by food *** their cultural context.it.is hard to adapt to the new concepts of farming,and they are not used to paddy rice cultivation *** the result of the project,the model successfully reduced the food shortage of 1.5 months less in average with more than 4,000 households *** model is now turned over to the local government as a case of sust.inable management *** paper aimed to examine what made the model effectively function.

关键词： System of rice intensification community-based dissemination model sust.inable management practices

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inundation Calculation of the Coastal Narrow Plain St.ip impacted by Upstream Reservoir Flood Discharge in Rainy and Extreme Flood Conditions

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Journal of Shipping and Ocean Engineering 2016年第3期6卷 165-178页

作者： Nguyen Ngoe Naml le Van Nghi Bui t.i Ngan Key Laboratory of Hydraulics River and Coastal Engineering 1/165 Chua Boc Street Hanoi Vietnam

in the context of current climate change, an abnormality of flooding is a common form of disaster in Vietnam. hanh Stream reservoir has occurred great flood in 1986, 2010. in the future, the risk of flooding is possible to happen again. in view of management of the risk of natural disasters： large flooding situation downstream is one of the most dangerous risks for the reservoir. Due to downstream of hanh Stream reservoir is a narrow coastal plains, quick infrastructure development, especially interwoven road and railway systems, so that flood drainage ability will be affected greatly. the consciousness of risks that may be occurred in the future in order to propose preventive measures and proactive response to minimize damages always is the requirement for all projects. the hydrodynamic calculation, flooding maps, emergency plan to prevent flooding downstream of hanh Stream reservoir is also needed. the article is raised the issue of requirements to calculate coastal narrow delta st.ip flooding in the Central of Vietnam when impacted by the upstream reservoir of flood discharge in terms of extreme heavy rain and flooding and presented computational methods of Mike software package for case flooded plain of Cam Ranh Bay in downstream reservoirs of hanh Stream, Khanh Hoa Province, Vietnam.

关键词： Reservoirs hanh Stream maps inundation narrow plain narrow delta coastal hydrodynamic calculation flood flooding.

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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 t.ieu thai Hung Hoang Van thang tran Duc Manh Cao Chi Khiem Vu tien Lam Nguyen Quang Hung tran Hoang Quy Pham Quang tuyen t.inh Ngoc Bon Nguyen t.i thu Phuong Ninh Viet Khuong Nguyen Van tuan Dang t.i Hai Ha tran Hai Long Dang Van thuyet Dang t.inh t.ieu Nguyen Van t.inh tran Anh Hai Duong Quang trung Nguyen Van Bich Dinh Hai Dang Pham tien Dung Nguyen Huy Hoang le t.i hanh Phan Minh Quang Nguyen t.i thuy Huong Hoang thanh Son Nguyen thanh Son Nguyen t.i Van Anh Nguyen t.i Hoai Anh Pham Dinh Sam Hoang t.i Nhung Hoang Van thanh Nguyen Huu t.inh tran Hong Van Ho trung Luong Bui Kieu Hung Research institute for Sust.inable 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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