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A tree-based intelligence ensemble approach for spatial prediction of potential groundwater

International Journal of Digital Earth 2020年第12期13卷 1408-1429页

作者： Mohammadtaghi Avand Saeid Janizadeh Dieu Tien Bui Viet Hoa Pham phuong Thao T.Ngo Viet-ha Nhu Faculty of Natural Resources and Marine Sciences Tarbiat Modares UniversityTehranIran Geographic Information Science Research Group Ton Duc Thang UniversityHo Chi Minh CityVietnam Faculty of Environment and Labour Safety Ton Duc Thang UniversityHo Chi Minh CityVietnam Ho Chi Minh City Institute of Resources Geography Vietnam Academy of Science and TechnologyHo Chi Minh CityVietnam Institute of Research and Development Duy Tan UniversityDa NangVietnam Department of Geological-Geotechnical Engineering Hanoi University of Mining and GeologyHanoiVietnam

The objective of this research is to propose and confirm a new machine learning approach of Best-First tree(BFtree),AdaBoost(AB),MultiBoosting(MB),and Bagging(Bag)ensembles for potential groundwater mapping and assessing role of influencing *** Yasuj-Dena area(Iran)is selected as a case *** this regard,a Yasuj-Dena database was established with 362 springs locations and 12 groundwater-influencing factors(slope,aspect,elevation,stream power index(SPI),length of slope(LS),topographic wetness index(TWI),topographic position index(TPI),land use,lithology,distance from fault,distance from river,and rainfall).The database was employed to train and validate the proposed groundwater *** area under the curve(AUC)and statistical metrics were employed to check and confirm the quality of the *** result shows that the BFTree-Bag model(AUC=0.810,kappa=0.495)has the highest prediction performance,followed by the BFTree-MB model(AUC=0.785,kappa=0.477),and the BFTree-MB model(AUC=0.745,kappa=0.422).Compared to the benchmark of Random Forests,the BFTree-Bag model performs better;therefore,we conclude that the BFtree-Bag is a new tool should be used for modeling of groundwater potential.

关键词： Environmental modeling groundwater potential GIS ensemble model decision tree

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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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Health literacy of adult Vietnamese population in relation to common eye conditions and factors for not seeking an eye examination

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Eye Science 2016年第3期31卷 130-139页

作者： Prakash Paudel Thomas Naduvilath Vilas Kovai ha Thanh phuong Suit May Ho David Wilson Brien Holden Vision Institute SydneyAustralia chool of Optometry and Vision Science University of New South WalesSydneyAustralia

Background:The aim of this study was to assess the health literacy of adult Vietnamese population in relation to common eye conditions and identify factors associated with respondents never having had an eye ***:Four hundred households from two districts of Ba Ria-Vung Tau(BRVT) province were selected by multistage cluster random *** adult from each household was administered a pre-tested knowledge,attitude and practices toward eye health ***-square test and logistic regression were used for statistical ***:Of the 400 subjects interviewed(mean age:51.5±14.5 years;range,30-90 years),53.5%reported never having had an eye examination and 38.0%had *** of eye conditions ranged from7.0%for glaucoma to 52.8%for red *** awareness of these conditions was significantly associated with rural habitation(odds ratio ranged from 1.65 to 2.78),lower educational attainment(odds ratio ranged from 1.78 to 2.59) and non-spectacle wear(odds ratio ranged from 1.88 to 4.55).Significant barriers to eye examination included lower educational attainment,reported absence of eye problems,non-spectacle wear,lack of affordability,and lack of health ***:Knowledge of and attitude or practices to eye health is low within the general public in Vietnam,especially among those who have never had an eye examination,are less educated and live in rural *** health promotion activities are warranted for the population and specific factors that influence eye examination visits should be addressed.

关键词： Awareness epidemiology eye disease public health Vietnam

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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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苦苣苔科凹柱苣苔属在越南的发现及水晶凹柱苣苔的补充描述

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广西植物 2020年第10期40卷 1445-1449页

作者：陆昭岑 nguyen Khang Sinh PhaN Ke Loc TRAN Thi phuong Anh 许为斌广西喀斯特植物保育和恢复生态学重点实验室广西壮族自治区中国科学院广西植物研究所中国广西桂林541006 越南科学技术研究院生态与生物资源研究所越南河内10072 越南科学技术研究院科学技术研究生院越南河内10000 越南国立大学河内科学院越南河内11416

中越边境喀斯特地区有着异乎寻常的植物多样性,已经成为全球生物多样性研究和保护的热点区域,近年来在该区发现了多个苦苣苔科植物的新种或新属。凹柱苣苔属是2010年才被建立的新属,该属的花与叶相比,花较大,叶相对较小,叶片边缘稍外卷... 详细信息

中越边境喀斯特地区有着异乎寻常的植物多样性,已经成为全球生物多样性研究和保护的热点区域,近年来在该区发现了多个苦苣苔科植物的新种或新属。凹柱苣苔属是2010年才被建立的新属,该属的花与叶相比,花较大,叶相对较小,叶片边缘稍外卷,花序仅单花,柱头盘状或凹坑状,蒴果长椭球形而有别于苦苣苔科的其他属。凹柱苣苔属为喀斯特专性植物,目前仅包括分布于黔西南的凹柱苣苔和分布于滇东南的水晶凹柱苣苔两个物种。作者在开展中越边境喀斯特地区植物多样性调查时,在越南北部的河江省发现了水晶凹柱苣苔,基于该新发现居群的植物标本,对其进行了补充描述,确认其花期为11月—12月,并对该物种濒危状况进行了重新评估,同时提供了野外生态照片以资辨认。目前,越南已记录苦苣苔科植物32属150余种,凹柱苣苔属在越南北部的发现,不仅丰富了该国苦苣苔科植物的多样性,再一次充分证明了中越边境喀斯特地区是一个完整的植物区系地理单元,而且为稀有的水晶凹柱苣苔提供了更加丰富的野外本底资料,对其将来的深入研究和保护具有重要的生物地理学和保护生物学意义。

关键词：越南植物区系石灰岩植物区系中越边境喀斯特地貌

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Study the Changes in Soil Organic Carbon of Rice-Maize Cropping System in the Top Layer of Alluvisol Soil in Dan phuong: A Study of C-13 Stable Isotope Composition (<i>δ</i><sup>13</sup>C)

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Journal of Environmental Protection 2019年第10期10卷 1361-1372页

作者： nguyen Thi Hong Thinh Vu Hoai ha Lan Anh Vo Thi Anh Truong Viet Chau Trinh Van Giap Tran Minh Tien Isotope Hydrology Laboratory Institute for Nuclear Science and TechnologyHanoiVietnam Soils and Fertilizers Research Institute HanoiVietnam

In this study, the experiments on field were conducted to examine the change in the content of soil organic carbon (SOC), its C-13 stable isotope composition (δ 13C) and some main physical, chemical parameters (soil moisture, pH, soil density, content of humic, fulvic, total N, total P, total K) in alluvial soil of Dan phuong region—Vietnam at a depth of 0 - 30 cm when we changed the regime from 2 maize -1 rice crop to 2 rice - 1 maize crop per 1 year. In addition to analyzing the main parameters in soil, C content and its δ 13C value in parts of rice and maize (root, stem and leaf) were also analyzed to assess the contribution of plant residues on soil organic carbon content after harvest. The experiment was carried out in 2016-2017 on the field with the traditional farming method of local farmers along with the tropical monsoon weather conditions of the North-Vietnam. The results showed that SOC had positive correlation with total N, total P parameters and negative correlation with δ 13C values of soil samples at two layers (0 - 15 cm and 15 - 30 cm). The average of total dry biomass (stem, stump + roots and leaf parts) per 1 rice and 1 maize crop was 10.64 Mg/ha and 9.09 Mg/ha, respectively. The average of δ 13C value of rice (C3 plant) was -29.78‰ and its value of maize (C4 plant) was -12.61‰. The new plant (rice) contributes to the total soil organic carbon content from 11.31% to 44.14% at the 0 - 15 cm layer and from 6.55% to 11.31% at the 15 - 30 cm layer in one-year experiment period.

关键词： Soil Organic Carbon (SOC) C-13 Stable Isotope Maize and Rice Crop Soil Properties

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Application of Remote Sensing and GIS Technology in Mapping Partition Saline Intrusion to Paddy Land:A Case Study at Phu Vang District,Thua Thien Hue Province

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Journal of Agricultural Science and Technology(A) 2017年第B10期7卷 48-59页

作者： nguyen Hoang Khanh Linh Le Ngoc phuong Quy Truong Do Minh phuong nguyen Trac Ba An Faculty of Land Resources and Agricultural Environment University of Agriculture and ForestryHue University102 Phung Hung StreetHue 530000Vietnam

Adapting and restricting salinity intrusion in Vietnam is being concerned by more researchers as well as the local *** study aimed to use remote sensing and geographic information system(GIS)technology for mapping paddy areas and salinity intrusion in spring crop 2015 at Phu Vang district,thereby helping precondition for assessing and monitoring changes in salinity intrusion to serve for salinization management in study *** on acquisition imagery,land use map and normalized difference vegetation index(NDVI)were extracted to interpolate the salinity of area by combining the laboratory analysis of collected soil samples from the *** result showed that there were 1,067.107 ha of salinity land area accounting for 10.04%of the rice land in Phu Vang district,where the moderate salinity level was 180.67 ha and low salinity level was 866.431 *** salinity rice land was mainly distributed in Vinh ha commune,Phu An commune and Phu Dien *** salinity in this area ranged from 0.4 mS/cm to 1.41 mS/cm and the moderate salinity was approximately 0.9 mS/***,this research also showed that the salinity(electrical conductivity)and the development of vegetation(NDVI)were closely related with each other up to 61.4%.

关键词： GIS remote sensing normalized difference vegetation index salinity intrusion paddy land

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Study on Reproductive Performance of Terapon jarbua(Forsskal,1775)in Tam Giang-Cau hai Lagoon Systems,Thua Thien Hue Province

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Journal of Agricultural Science and Technology(A) 2017年第B10期7卷 93-97页

作者： Le Thi Nhu phuong nguyen Quang Linh ha Long University Uong Bi City 200000Quang Ninh ProvinceVietnam Institute of Biotechnology Hue UniversityPhu ThuongPhu VangThua Thien Hue 530000Vietnam

Terapon jarbua was collected from Tam Giang-Cau hai lagoon systems and then their reproductive performances were *** 342 species were caught by otter trawlers and different fishing gears in marine and Tam Giang-Cau hai lagoon systems on certain days of each month during period from September 2015 to August 2016 at fishing *** determination of age was based on composition of the fish:ear,scaly,spine,gill cover and spine and the ovarian histology *** gonads after being fixed with Bouins solution were cleansed,cut,dyed and put on the observation *** showed that the sex of Terapon jarbua was nearly clarified at the approximately 1+age group and participated in reproduction process in the first time at the 1+age *** batch and relative fecundity of Terapon jarbua were *** batch fecundity of Terapon jarbua varied from 239,029 to 420,400 *** relative fecundity capacity fluctuated from 945 to 1,013 of eggs per gram of fish and the mean value by 981 eggs per gram of *** spawning season of fish occurred from March to May annually.

关键词： Terapon jarbua reproductive biology Thua Thien Hue

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杂交粳稻亲本产量性状优异配合力的标记基因型筛选

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作物学报 2010年第8期36卷 1270-1279页

作者：梁奎黄殿成赵凯铭阮方松谢辉马文霞洪德林南京农业大学作物遗传与种质创新国家重点实验室江苏南京210095 中国农业科学院棉花研究所河南安阳455000 越南北中部农业技术研究院天津市水稻技术工程中心天津300457

提高杂交粳稻竞争优势的关键是改良其恢复系产量性状的配合力。为使之更富成效,选用115个SSR引物扩增6个粳稻BT型不育系和12个恢复系的标记基因型,并按NCII遗传设计配制72个F1组合,分析18个亲本的单株日产量、单株有效穗数、每穗总粒数... 详细信息

提高杂交粳稻竞争优势的关键是改良其恢复系产量性状的配合力。为使之更富成效,选用115个SSR引物扩增6个粳稻BT型不育系和12个恢复系的标记基因型,并按NCII遗传设计配制72个F1组合,分析18个亲本的单株日产量、单株有效穗数、每穗总粒数、每穗实粒数、千粒重5个性状的配合力,结合亲本SSR分子标记数据和性状配合力数据筛选了5个性状优异配合力的标记基因型。结果发现20个SSR标记基因型与亲本产量及其构成性状配合力显著相关。其中8个与亲本单个性状配合力相关;6个同时与亲本2个性状配合力相关;4个同时与亲本3个性状配合力相关;2个同时与亲本4个性状配合力相关。同时与多个性状配合力相关的标记基因型,对各性状的作用方向有正有负。RM152-165/170是单株日产量和单株有效穗数优异配合力效应最大的标记基因型,可使F1的相应性状值增加20.6%和12.7%。优异配合力的标记基因型可直接用于粳稻恢复系配合力的分子标记辅助改良。

关键词：粳稻配合力 SSR标记产量及其构成因素标记基因型

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杂交粳稻亲本米质性状优异配合力的标记基因型鉴定

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作物学报 2011年第3期37卷 405-414页

作者：黄殿成梁奎孙程江建华石明亮戴剑谢辉赵凯铭阮方松马文霞洪德林南京农业大学作物遗传与种质创新国家重点实验室江苏南京210095 中国农业科学院棉花研究所河南安阳455000 江苏沿江地区农业科学研究所江苏如皋226541 江苏省农业科学院食品质量安全与检测研究所江苏南京210014 天津市水稻技术工程中心天津300457 越南北中部农业技术研究院

杂交粳稻米质整体水平不如常规粳稻也是限制杂交粳稻广泛种植的原因之一。本研究选用115个SSR引物扩增6个粳稻BT型不育系和12个恢复系的标记基因型,并分析72个F1组合谷粒长、谷粒宽、糙米率、精米率、整精米率、垩白米率、垩白度、糊化... 详细信息

杂交粳稻米质整体水平不如常规粳稻也是限制杂交粳稻广泛种植的原因之一。本研究选用115个SSR引物扩增6个粳稻BT型不育系和12个恢复系的标记基因型,并分析72个F1组合谷粒长、谷粒宽、糙米率、精米率、整精米率、垩白米率、垩白度、糊化温度、胶稠度和直链淀粉含量10个米质性状的配合力,结合亲本SSR分子标记数据和性状配合力数据筛选了10个米质性状优异配合力的标记基因型。结果共鉴定出30个SSR标记基因型与亲本10个米质性状配合力显著相关,其中25个与亲本米质性状不良配合力相关,5个与优异配合力相关。标记基因型RM263-175/180和RM444-230/240可以使F1整精米率分别提高3.2%和2.5%。RM3-120/150可以使F1谷粒长缩短2.4%,RM444-180/240可以使F1谷粒宽增加2.1%。RM428-273/294可以使F1植株上的杂交稻米直链淀粉含量减少7.0%。有8个标记基因型同时也影响产量性状配合力。RM3-120/150同时可以使F1的每穗总粒数和每穗实粒数分别增加15.9%和10.9%。RM1211-150/160可使F1的糙米率和精米率分别减少0.9%和1.1%,同时使F1的每穗总粒数和每穗实粒数分别增加21.8.%和20.4%。RM23-150/160可使F1的垩白米粒率和垩白度分别增加44.1%和45.7%,同时使F1的单株日产量和每穗总粒数分别增加11.2%和11.6%。这些结果可用于指导亲本米质性状和产量性状配合力的分子标记辅助改良以及未来杂交粳稻组合配置中的亲本选配。

关键词：粳稻配合力 SSR标记米质标记基因型

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