维普中文期刊产品整合服务
220篇 您的检索式:作者名="Nguyen HA"
    题名 作者 年代 出处 被引量
1绿肥间作对茶树根际土壤真菌群落的影响显示文摘通过IonS5TM XL高通量测序技术探讨了茶园间作光叶苕子-茶肥1号(CF)、湘野豌1号-田菁(TJ)、肥田萝卜-圆叶决明(JM)对茶树根际土壤真菌群落结构特征和土壤养分的影响。结果表明:与对照(无间作)相比,间作绿肥提高了土壤有机质、全氮、碱解氮、有效磷和速效钾的含量,其提高幅度分别为1.19%~23.79%、0.87%~12.17%、4.37%~14.34%、23.08%~62.12%和7.70%~44.06%。茶树根际土壤真菌Shannon指数和Chaos指数的变化趋势均为TJ>CK>JM>CF,其中TJ与CF处理间差异显著(P<0.05),其他处理间差异不显著(P>0.05)。被孢霉门(Mortierellomycota)、子囊菌门(Ascomycota)和担子菌门(Basidiomycota)为茶树根际土壤中三大优势真菌门,绿肥间作提高了担子菌门的相对丰度,降低了球囊菌门(Glomeromycota)和罗兹菌门(Rozellomycota)的相对丰度;被孢霉纲(Mortierellomycetes)、银耳纲(Tremellomycetes)和粪壳菌纲(Sordariomycets)为三大优势菌纲;沙蜥属(Saitozyma)、被孢霉属(Mortierell)和镰刀霉属(Fusarium)为3大优势菌属。冗余(RDA)分析结果显示,土壤全磷、有效磷、有机质、全氮和碱解氮影响茶树根际土壤真菌群落结构。经FUNGuild软件平台分析显示,茶树根际包含如下生态功能群:未定义腐生菌、丛枝菌根、真菌寄生菌、木质腐生菌、动物病原菌、植物病原菌、外生真菌等。茶园间作绿肥翻埋还田,能有效调节茶树根际土壤真菌群组成,改善茶园土壤生态环境,是实现茶叶绿色可持续发展的重要措施。傅海平 周品谦 王沅江 莫泽东 李泽恒 马青平 Hoang Ha Nguyen 黎星辉 2020茶叶通讯2020,47,3:15
2Studies on sustainable features of vernacular architecture in different regions across the world:A comprehensive synthesis and evaluation显示文摘Due to the increasing pressure brought by recent global environmental problems,building designers are embracing regionalism and the knowledge of traditional structures,arguing that these structures are energy efficient and highly sustainable.We observe clear evidence of the increasing interest in vernacular architecture among the research community.This study therefore aims to clarify the contents and issues raised in the studies on vernacular architecture and the knowledge and recommendations that can be derived from them.A database of the research is established by collecting many studies from primary sources.Obtained data is carefully refined and categorized into a table where synthesized information is introduced.The results of this study show an uneven geographic and climatic distribution of the studies;the trend in selecting research objectives and research objects;the choice of research methods with a clear shift towards quantitative research methods,and the generic findings from the database of the research.These results can support diverse inquiries about vernacular architecture across the world and be used as a resource or an orientation to support numerous subsequent studies.Anh Tuan Nguyen Nguyen Song Ha Truong David Rockwood Anh Dung Tran Le 2019Frontiers of Architectural Research2019,8,4:6
3Synthesis and characterization of NaYF4:Yb3+,Er3+@silica-N=folic acid nanocomplex for bioimaginable detecting MCF-7 breast cancer cells显示文摘Upconversion nanophosphors are new promising nanomaterials to be used as biolabels for detection and imaging of cancer cells.These nanophosphors absorb long-wavelength excitation radiation in the infrared or near infrared region and emit shorter wavelength,higher energy radiation from ultraviolet to infrared.In this paper,we studied the hydrothermal method and optical properties of the functionalized NaYF4:Yb^3+,Er^3+for biomedical application.After synthesis,these NaYF4:Yb^3+,Er^3+nanophosphors were functionalized with aminosilanes and folic acid.Folic acid binds to the folate receptor on the surface of MCF-7 breast cancer cells and this binding promotes internalization of the nanophosphors via endocytosis.The sizes of the functionalized NaYF4:Yb^3+,Er^3+@silica-N=FA(folic acid)nanophosphors can be controlled with length of the rod about 300-800 nm and diameter of the rod about 100-200 nm.Phase structure of NaYF4:Yb^3+,Er^3+is in hexagonal crystal system.The photo luminescence(PL)spectra of the functionalized NaYF4:Yb^3+,Er^3+@silica-N=FA nanophosphors were measured.These nanophosphors emit in red color with the strongest band at 650 nm under 980 nm excitation.This result can provide NaYF4:Er^3+,Yb^3+@silica-N=FA complex for developing fluorescence label and image tool in cancer biology and medicine.Ha Thi Phuong Tran Thu Huong Le Thi Vinh Hoang Thi Khuyen Do Thi Thao Nguyen Thanh Huong Pham Thi Lien Le Quoc Minh 2019Journal of Rare Earths2019,37,11:5
4越南火龙果冷藏现状分析显示文摘随着全球化经济的快速发展,食品冷藏技术日益重要。文中综述了越南火龙果的现有冷藏技术及其存在的问题,并提出解决方案。Ha Khiet Nghi 刘宝林 Nguyen Van Luu 宋晓燕 2011低温与超导2011,39,4:4
5Hydrocarbon Systems in the North-Eastern Area of the Song Hong Basin显示文摘Trinh Xuan Cuong Phan Ngoc Trung Tong Duy Cuong Nguyen Bich Ha Phung Lan Phtro'ng Hoang ThiLan Nguyen Hoang Son 2013Journal of Earth Science and Engineering2013,3,12:3
6Gastric per-oral endoscopic myotomy: Current status and future directions显示文摘Gastroparesis, or symptomatic delayed gastric emptying in the absence of mechanical obstruction, is a challenging and increasingly identified syndrome. Medical options are limited and the only medication approved by the Food and Drug Administration for treatment of gastroparesis is metoclopramide, although other agents are frequently used off label. With this caveat, first-line treatments for gastroparesis include dietary modifications, antiemetics and promotility agents, although these therapies are limited by suboptimal efficacy and significant medication side effects. Treatment of patients that fail first-line treatments represents a significant therapeutic challenge. Recent advances in endoscopic techniques have led to the development of a promising novel endoscopic therapy for gastroparesis via endoscopic pyloromyotomy, also referred to as gastric per-oral endoscopic myotomy or per-oral endoscopic pyloromyotomy. The aim of this article is to review the technical aspects of the per-oral endoscopic myotomy procedure for the treatment of gastroparesis, provide an overview of the currently published literature, and outline potential next directions for the field.Alexander Podboy Joo Ha Hwang Linda A Nguyen Patricia Garcia Thomas A Zikos Afrin Kamal George Triadafilopoulos John O Clarke 2019World Journal of Gastroenterology2019,25,21:3
7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显示文摘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。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 2022新型炭材料2022,37,3:3
8Development of a PARCS/Serpent model for neutronics analysis of the Dalat nuclear research reactor显示文摘Cross-sectional homogenization for full-core calculations of small and complex reactor configurations,such as research reactors,has been recently recognized as an interesting and challenging topic.This paper presents the development of a PARCS/Serpent model for the neutronics analysis of a research reactor type TRIGA Mark-II loaded with Russian VVR-M2 fuel(known as the Dalat Nuclear Research Reactor or DNRR).The full-scale DNRR model and a supercell model for a shim/safety rod and its surrounding fuel bundles with the Monte Carlo code Serpent 2 were proposed to generate homogenized fewgroup cross sections for full-core diffusion calculations with PARCS.The full-scale DNRR model with Serpent 2 was also utilized as a reference to verify the PARCS/Serpent calculations.Comparison of the effective neutron multiplication factors,radial and axial core power distributions,and control rod worths showed a generally good agreement between PARCS and Serpent 2.In addition,the discrepancies between the PARCS and Serpent 2 results are also discussed.Consequently,the results indicate the applicability of the PARCS/Serpent model for further steady state and transient analyses of the DNRR.Viet-Phu Tran Kien-Cuong Nguyen Donny Hartanto Hoai-Nam Tran Vinh Thanh Tran Van-Khanh Hoang Pham Nhu Viet Ha 2021Nuclear Science and Techniques2021,32,2:2
9Prediction of Flash Flood Susceptibility of Hilly Terrain Using Deep Neural Network:A Case Study of Vietnam显示文摘Flash floods are one of the most dangerous natural disasters,especially in hilly terrain,causing loss of life,property,and infrastructures and sudden disruption of traffic.These types of floods are mostly associated with landslides and erosion of roads within a short time.Most of Vietnamis hilly and mountainous;thus,the problem due to flash flood is severe and requires systematic studies to correctly identify flood susceptible areas for proper landuse planning and traffic management.In this study,three Machine Learning(ML)methods namely Deep Learning Neural Network(DL),Correlation-based FeatureWeighted Naive Bayes(CFWNB),and Adaboost(AB-CFWNB)were used for the development of flash flood susceptibility maps for hilly road section(115 km length)of National Highway(NH)-6 inHoa Binh province,Vietnam.In the proposedmodels,88 past flash flood events were used together with 14 flash floods affecting topographical and geo-environmental factors.The performance of themodels was evaluated using standard statisticalmeasures including Receiver Operating Characteristic(ROC)Curve,Area Under Curve(AUC)and Root Mean Square Error(RMSE).The results revealed that all the models performed well(AUC>0.80)in predicting flash flood susceptibility zones,but the performance of the DL model is the best(AUC:0.972,RMSE:0.352).Therefore,the DL model can be applied to develop an accurate flash flood susceptibility map of hilly terrain which can be used for proper planning and designing of the highways and other infrastructure facilities besides landuse management of the area.Huong Thi Thanh Ngo Nguyen Duc Dam Quynh-Anh Thi Bui Nadhir Al-Ansari Romulus Costache Hang Ha Quynh Duy Bui Sy Hung Mai Indra Prakash Binh Thai Pham 2023Computer Modeling in Engineering & Sciences2023,,6:2
10Detection of PAHs in seawater using surface-enhanced Raman scattering (SERS)显示文摘Heinar Schmidt Nguyen Bich Ha Jens Pfannkuche Hans Amann Heinz-Detlef Kronfeldt Grazyna Kowalewska 2004Marine Pollution Bulletin2004,,3:2
11火龙果的冷却方式选择显示文摘[目的]研究火龙果的最佳冷却方法。[方法]首先进行不同终压(550、600及650Pa)的真空预冷、不同水温(0、1.5及3℃)的水冷及2m/s风速的强制通风(4℃)试验,然后,从每种试验中选择最优组进行比较,从中选择最适合火龙果的冷却方式。[结果]真空预冷最低只能将火龙果降到10℃左右;强制通风虽能把火龙果降到5℃以下,但时间过长,需要4~5h;冷水温度为0℃时,火龙果的温度降低最快,1h可降到5.5℃。[结论]火龙果的最佳冷却方式是0℃水冷。Nguyen Van Luu 刘宝林 宋晓燕 华泽钊 Ha Khiet Nghi 2011安徽农业科学2011,39,17:2
12Adherence to Screening for Hepatocellular Carcinoma Among Patients with Cirrhosis or Chronic Hepatitis B in a Community Setting显示文摘Carrie R. Wong Ruel T. Garcia Huy N. Trinh Khoa D. Lam Nghi B. Ha Huy A. Nguyen Khanh K. Nguyen Brian S. Levitt Mindie H. Nguyen 2009Digestive Diseases and Sciences2009,,12:2
13Upconversion luminescence of Gd2O3:Er3+and Gd2O3:Er3+/silica nanophosphors fabricated by EDTA combustion method显示文摘Gd2O3:Er^3+nanophosphors were fabricated by the combustion method in presence of Na2 ethylene diamine tetra acetic acid(EDTA-Na2)as fuel at not high temperature(≤350℃)within a very short time of 5 min.The added concentration of Er^3+ions in Gd2O3 matrix was changed from 0.5 mol%to 5.0 mol%.The X-ray diffraction pattern of samples indicates the monoclinic structure of Gd2O3:Er^3+.The morphology and chemical composition analysis of the Gd2O3:Er^3+samples are characterized by a field emission scanning electron microscope(FESEM)and a Fourier-transform infrared spectrometer(FTIR).The photoluminescence(PL),photo luminescence excitation(PLE)and upconversion(UC)at room temperature of the prepared materials with different concentrations of Er^3+were investigated.The PL of Gd2O3:Er^3+nanomaterials are shown in visible at 545,594,623,648,688 nm under excitation at 275 nm.The emission bands from transitions of Er^3+from 2P3/2 to 4F9/2 are observed,UC luminescent spectra of the Gd2O3:Er^3+/silica nanocomposites under 976 nm excitation show the bands at 548 and 670 nm.The influence of excitation power at 980 nm for transitions were measured and calculated.The results indicate that the upconversion process of Gd2O3:Er^3+/silica is two photons absorption mechanism.The low temperature dependence of UC luminescent intensities of the main bands of Gd2O3:Er^3+was investigated towards development of a nanotemperature sensor in the range of 10-300 K.Le Quoc Minh Tran Kim Anh Nguyen Duy Hung Pham Thi Minh Chau Nguyen Thi Quy Hai Ho Van Tuyen Vu Thi Thai Ha Vu Duc Tu Wieslaw Strek 2019Journal of Rare Earths2019,37,11:2
14Bounds of weighted multilinear Hardy-Ceshro operators in p-adic functional spaces显示文摘Nguyen Minh CHUONG Nguyen Thi HONG Ha Duy HUNG 2018Frontiers of Mathematics in China2018,13,1:2
15Impedance Control of a Hydraulically Actuated Robotic Excavator 显示文摘NGUYEN Q HA Q RYE D DURRANT-WHYTE H 2000Automation in Construction2000,9,:1
16Modeling of cast systems using smoothed-particle hydrodynamics显示文摘Paul Cleary Mahesh Prakash Joseph Ha Matthew Sinnott Thang Nguyen John Grandfield 2004JOM2004,,3:1
17Locally weighted learning based hybrid intelligence models for groundwater potential mapping and modeling: A case study at Gia Lai province, Vietnam显示文摘The groundwater potential map is an important tool for a sustainable water management and land use planning,particularly for agricultural countries like Vietnam.In this article,we proposed new machine learning ensemble techniques namely AdaBoost ensemble(ABLWL),Bagging ensemble(BLWL),Multi Boost ensemble(MBLWL),Rotation Forest ensemble(RFLWL)with Locally Weighted Learning(LWL)algorithm as a base classifier to build the groundwater potential map of Gia Lai province in Vietnam.For this study,eleven conditioning factors(aspect,altitude,curvature,slope,Stream Transport Index(STI),Topographic Wetness Index(TWI),soil,geology,river density,rainfall,land-use)and 134 wells yield data was used to create training(70%)and testing(30%)datasets for the development and validation of the models.Several statistical indices were used namely Positive Predictive Value(PPV),Negative Predictive Value(NPV),Sensitivity(SST),Specificity(SPF),Accuracy(ACC),Kappa,and Receiver Operating Characteristics(ROC)curve to validate and compare performance of models.Results show that performance of all the models is good to very good(AUC:0.75 to 0.829)but the ABLWL model with AUC=0.89 is the best.All the models applied in this study can support decision-makers to streamline the management of the groundwater and to develop economy not only of specific territories but also in other regions across the world with minor changes of the input parameters.Hoang Phan Hai Yen Binh Thai Pham Tran Van Phong Duong Hai Ha Romulus Costache Hiep Van Le Huu Duy Nguyen Mahdis Amiri Nguyen Van Tao Indra Prakash 2021Geoscience Frontiers2021,12,5:1
18Force/position Tracking for Electrohydraulic Systems of a Robotic Excavator显示文摘NGUYEN Q HA Q RYE D DURRANT-WHYTE H 2000IEEE Conference on Decision and Control2000,,:1
19Fuzzy sliding-mode controllers with applications显示文摘HA Q P NGUYEN Q H RYE D C 0,,:1
20The thermal polymerization of amino acids revisited: Synthesis and structural characterization of hyperbranched polymers from L-lysine显示文摘Scholl M Nguyen TQ Bruchmann B Klok HA 2007Journal of Polymer Science Part A: Polymer Chemistry2007,45,23:1
返回顶部 每页显示:
共11页 首页 上一页 第1页 下一页 末页 /11 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费