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材料科学与工程（中英文B版） 2014年第8期4卷 226-231页

作者： Banh Tien Long Ngo Cuong nguyen huu Phan Materials and Industrial Instrument Machining Engineering College Hanoi University of Science and Technology Hanoi Vietnam Technical-Economics College Thai Nguyen University Vietnam

Electrical discharge machining is an important manufacturing process for tool mould and die industries. The results of the research about EDM show that the performance of die sink reduced due to a change in the material quality of the surface layer than the base material. The article presents the result of the study on the hot forging die surface layer of the SKD61 hot die steel (surface roughness, surface microscopic hardness, microscopic structure of the surface layer, EDS analysis of the surface layer) after die sinking electrical discharge machining using a tool of titanium and copper in oil dielectric.

关键词：电火花加工模具行业表面层 SKD61钢热锻模开模实验表面粗糙度

A Survey of Routing Using DHTs over WSNs

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通讯和计算机（中英文版） 2011年第1期8卷 23-30页

作者： Vinh Vu Thanh Hung nguyen Chan Thanh nguyen huu Binh Pham Viet Faculty of Information Technology Thai Nguyen University Quyet Thang commune Thai Nguyen city Vietnam Faculty of Electronics and Telecommunications Hanoi University of Technology Hanoi Vietnam

十九世纪末二十世纪初越南北部三角洲村社组织管理中的乡约

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地方文化研究 2016年第3期4卷 74-86页

作者：武维绵阮友心越南社会科学翰林院史学院越南社会科学翰林院史学院图书馆

越南北部三角洲的乡约来源于乡民俗例。越南的乡约理论在结合儒家理论的基础上,由越南村社的儒教队伍创造出来。乡约被看为儒教教化的管理工具,但不完全是行政组织和法制工具,而偏重于道德、人文教育意义。乡约规定各个行政社会组织的... 详细信息

越南北部三角洲的乡约来源于乡民俗例。越南的乡约理论在结合儒家理论的基础上,由越南村社的儒教队伍创造出来。乡约被看为儒教教化的管理工具,但不完全是行政组织和法制工具,而偏重于道德、人文教育意义。乡约规定各个行政社会组织的全面活动,包括设置行政机构及基层社会组织、征收税课、兵额、杂役、均分公土、使用寺庙田土、保持村社安宁秩序、安排亭中的位次、村社乡饮和犒望、施行乡约的赏罚等。其目的在于使村社里的每个组织成员劝善惩恶,维护共同利益,保持村社在社会变动之前仍然保持安宁。

关键词：乡约管理村社北部越南

Soil Gas Radon Measurement for Identifying Active Faults in Thua Thien Hue (Vietnam)

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Journal of Geoscience and Environment Protection 2020年第7期8卷 44-64页

作者： Pham Tich Xuan nguyen Anh Duong Vu Van Chinh Pham Thanh Dang nguyen Xuan Qua nguyen Van Pho Institute of Geological Sciences Vietnam Academy of Science and Technology Hanoi Vietnam Institute of Geophysics Vietnam Academy of Science and Technology Hanoi Vietnam

The solid-state nuclear track detectors have long been applied to assess the activity of tectonic faults. We measured the Radon (Rn) concentration in soil gas on 09 profiles with a total of 245 measurement points in Thua Thien Hue area (Vietnam). Measurement results show that the Rn concentration in soil gas ranges from ~10 Bq/m3 to 144,570 Bq/m3. There is a clear difference in the Rn concentration on the granite rock of Dai Loc complex compared to the remaining rocks. The calculated background value and anomaly threshold of Rn concentration on the granite rock of Dai Loc complex and on the remaining rocks are 33,488 Bq/m3, 82,839 Bq/m3 and 5313 Bq/m3, 24,850 Bq/m3 respectively. Spatial distribution of Rn concentration in soil gas reflects the existence of faults since Rn concentration increases at the points above or near fault lines. The level of expression of fault activity is assessed by radon activity index (KRn), which is calculated by the ratio of anomaly value to background value of Rn concentration. According to KRn, in Thua Thien Hue area, only the Dakrong-Hue fault shows a strong expression of activity with high and very high KRn (the maximum KRn = 27.21). The Truong Son, huu Trach River, Ta Trach River and Bo River fault zones do not show clear activity with low and medium KRn. There is no Rn anomaly value recorded on the Rao Trang fault, demonstrating that it is likely to be inactive at present. The study results indicate that the Rn concentration in soil gas is a strong evidence of the existence of faults or tectonic fracture zones as the Rn concentration always increases at the points above or near the fault line.

关键词： Radon Active Fault Radon Activity Index Thua Thien Hue Vietnam

Flood Hazard Mapping at Long Xuyen Quadrangle in2015 Using Geographic Information System and RemoteSensing Technologies

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Journal of Environmental Science and Engineering(B) 2019年第5期8卷 197-203页

作者： nguyen Thi Hong Diep Tran huu Duy Phan Kieu Diem nguyen Thi Be Nam nguyen Thi ThanhHuong Land Resources Department College of Environment and Natural ResourcesCan Tho UniversityCan Tho 940000Vietnam The Southwest Information and Appraisal Corporation(SIAC) Cantho 94000Vietnam Department of Natural Resources and Environment in Kien Giang Province Kien Giang 920000Vietnam Forest Ecology and Environment Department Faculty of Agriculture and ForestryTay Nguyen UniversityDakLak 630000Vietnam

In recent year,the flooding has occurred with high frequency at LXQ(Long Xuyen Quadrangle)areas of Mekong Delta,*** was considered as a major natural disaster which has effects on the physic and spirit in people’s life in this *** research aims to generate a flood hazard map and assess the flood situation at LXQ in *** MNDWI(Modification of Normalized Difference Water Index)extracting from Sentinel-2 image was used to map the flood extent at LXQ during rainy season in *** statistics method estimated correlation coefficient between flooding spatial distribution and hydrological stations on SPSS(Statistical Product and Services Solutions)*** results showed that the severe flood occurred from August to December in *** were about 47.6%and 28.2%of the total areas that were inundated in October and August,*** correlation between inundated areas and water level at Ha Tien and Chau Doc hydrological stations was 0.73 and 0.65(p<0.01),*** derived information was very essential and valuable for local managers in making decision on responding and mitigating to the flood disaster.

关键词： Flood distribution MNDWI LXQ correlation coefficient

Structural and Diffusion Coefficient Changes in Amorphous Co-P Alloy

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材料科学与工程（中英文B版） 2012年第8期2卷 482-486页

作者： Pham huu Kien Le Thi Huong Dung nguyen Van Dang Department of Physics Thai Nguyen University of Education Luong Ngoc Quyen street Thai Nguyen Viet Nam Department of Physics and Technology College of Science Thai Nguyen University Thai Nguyen Vietnam

Simulation Nutrient Load under Climate Change Condition and Deforestation Scenarios in Phu luong Watershed, Viet Nam

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Journal of Environmental Science and Engineering(B) 2012年第2期1卷 199-207页

作者： Dinh Binh Phan Thanh Hai nguyen Faculty of Resources and Environmental Science Thai Nguyen University of Agriculture and Forestry Thai Nguyen City 280 Vietnam

The purpose of this paper is to apply ＂Soil and Water Assessment Tool （SWAT）＂ model to simulate the impacts of climate change and deforestation on nutrient （nitrogen and phosphorus） yield from Phu luong watershed in Northern Viet Nam. Among the three climate change scenarios B1, B2 and A2, which represented low, medium, and high levels of greenhouse gas emission respectively, were set up for Viet Nam. The B2 scenario was selected for this study. Two land use scenarios （SI-2030 and S2-2050 which converted 4.43%. and 13.40% forest-mixed land into agricultural land, respectively） were formulated by combination with climatic change in SWAT simulation. In B2 climate change scenario, mean temperature increases 0.7 ℃ （2030） and 1.3 ℃（2050）; annual rainfall increases 2.1% （2030） and 3.80% （2050） with respect to baseline scenario. The results showed that monthly Nash-Sutcliffe coefficient of Efficiency （NSE） ranged from 0.81 to 0.96 and percent bias （PB1AS） ranged from -7.88 to 9.38. Additionally, SWAT simulation results also showed that climate change and deforestation caused significant percentage of changes in total N and P loads within Phu luong watershed.

关键词： SWAT climate change deforestation nutrient yield.

越南东北部Cat Ba岛泥盆系-石炭系过渡层的初探(英文)

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地球学报 2012年第S1期33卷 38-38页

作者： Toshifumi KOMATSU Reishi TAKASHIMA TA Hoa PHUONG Tran Huyen DANG Duc Phong nguyen huu Hung nguyen Satoru KATO Kento HIRATA Takumi MAEKAWA Graduate School of Science and Technology Kumamoto UniversityKumamoto 806-8555Japan The Center for Academic Resources and Archives Tohoku University Museum Tohoku UniversityAramaki Aza Aoba 6-3Aoba-kuSendai 980-8578Japan College of Sciences Vietnam National University334 Nguyen TraiThanh XuanHanoi Vietnam Vietnam Institute of Geosciences and Mineral Resources(VIGMR) HanoiVietnam Vietnam National Museum of Nature(VNMN) HanoiVietnam

The Pho Han Formation is exposed on southern Cat Ba Island,Hai Phong Province in northeastern Vietnam,and intercalates the Devonian and Carboniferous(D-C) boundary(Ta and Doan,2007;Komatsu et al.,2012).The D-C boundar... 详细信息

关键词： D-C boundary Conodont δ13C Cat Ba Island Vietnam

Using Visual MODFLOW Model to Assess the Efficiency of Subsurface Barrier Wall for Groundwater Flow Regulation and Reduction of Saline Intrution

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Journal of Environmental Science and Engineering(A) 2021年第3期10卷 104-115页

作者： nguyen Minh Khuyen Doan Van Long nguyen Tien Bach Tang huu Dong Bui Cong Du Dang Dinh Phuc Department of Water Resources Management Ministry of Natural Resources and EnvironmentHanoi 100000Vietnam Vietnam Association of Hyhrogeology Hanoi 100000Vietnam

Barrier walls effectively store water,regulate underground flows,improve exploitable reserves and prevent saltwater *** effectiveness of the underground barrier wall depends not only on the hydrogeological structure,the technical parameters of the wall but also on the layout scheme of the exploitation well *** results showed that in natural conditions,the ground water level upstream of the barrier wall rose in the presence of a barrier *** wells located downstream of high barrier walls,the water level *** amount of underground current flowing into the sea decreased,the annual average value of the whole region decreased was 316 m3/day and *** presence of a wall,both the water level and the amount of evaporation *** average increase in evaporation volume during the calculation period of ten thousand days with walls was 4.114 m3/*** in presence of a wall,the amount of water that can be exploited increases by the total amount of evaporation plus the decrease in discharge to the sea and is equal to 4,424 m3/*** the exploitation condition,if the water level in the presence of wall is kept as low as in the absence of wall,the exploitation flow will increase to about 4,400 m3/day and *** the calculated water level values when there is a wall and without a wall,we can see that if the exploitation flow in presence of a wall and in the absence of wall is the same,the water level drop at the calculated observation wells upstream of the wall will decrease from 0.21 m to 3.97 *** condition of effective exploitation of the wall depends on the mining *** exploitation scheme is reasonable,the exploitation flow of the wells does not exceed the allowable flow so as not to cause the drying of the aquifer at the location of the *** upstream area of the wall reflects quite clearly as the Total dissolved solids content in observation wells upstream of the wall at the end of the calculation time is significantly reduced c

关键词： Subsurface barrier wall store water regulate underground flows.

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.