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712篇 您的检索式:作者名="Nguyen Van"
    题名 作者 年代 出处 被引量
1Stable Vertical Takeoff of an Insect-Mimicking Flapping-Wing System Without Guide Implementing Inherent Pitching Stability显示文摘Hoang Vu Phan Quoc Viet Nguyen Quang Tri Truong Tien Van Truong Hoon Cheol Park Nam Seo Goo Doyoung Byun Min Jun Kim 2012Journal of Bionic Engineering2012,9,4:16
2AZ31镁合金磷酸镁转化膜的腐蚀性能(英文)显示文摘通过在含Mg^(2+)和 PO_4^(3-)离子的溶液中进行浸泡,在AZ31镁合金上制备磷酸镁转化膜以增强其抗腐蚀性能。经磷化处理20 min后,AZ31镁合金上的磷酸镁转化膜呈微裂纹状结构,厚度均匀(约为2.5μm)。X射线能谱分析和X射线光电子谱分析表明,磷酸镁转化膜由磷酸镁和氢氧化镁或氧化镁组成。磷酸镁转化膜对AZ31镁合金可起到强烈的保护作用。磷酸镁转化膜的腐蚀电流大幅降低,约为未覆膜表面腐蚀电流的3%。在0.5 mol/L Na Cl溶液中的腐蚀恶化时间由10 min延长至24Nguyen Van PHUONG Manoj GUPTA Sungmo MOON 2017Transactions of Nonferrous Metals Society of China2017,27,5:14
3不同种源越南杉木幼龄期叶绿素荧光特征比较显示文摘【目的】依据叶绿素荧光动力学对引种的9个越南种源地杉木开展幼龄期优良种源选择。【方法】时间取样为8月中旬8:00-10:00AM,每个种源取样10株,每株杉木取1a生叶和2a生叶,暗反应20min后对各种源叶片叶绿素荧光参数进行分析。【结果】不同种源杉木叶绿素荧光参数表现不一,差异显著,且各种源1a生叶荧光表现普遍优于2a生叶;综合评价各叶绿素荧光参数后可将9个种源划分成3种不同的幼龄期荧光特性类型,其中CL4、CL6、CL5和CL7种源光合作用能力较强。【结论】各杉木种源中,叶绿素荧光特征差异明显,嫩叶比老叶的光合作用能力较强。因此杉木嫩叶绿素荧光可能是杉木种源选择的快速途径。Nguyen Ba Trieu 陈宇 林小琴 丁国昌 Pham Van Huong 林思祖 2016四川农业大学学报2016,34,1:13
4住院期间反复跌倒的老年患者认知损伤特点的临床回顾性研究显示文摘目的:探索导致老年患者住院期间反复跌倒的相关因素,焦点在其认知损伤的特点,目的是探索可借鉴的管理经验。方法:回顾性地研究了在澳大利亚新南威尔士州Bankstown-Lidcombe医院老年科住院治疗期间发生跌倒的患者,其中住院期间跌倒1次以上的70例、1次的269例,并随机抽取没发生过跌倒的70例为对照组。同时,分析了部分患者的简易智能检查量表(MMSE)总分和各亚项目分数。结果:住院老年患者反复跌倒的独立危险因素是痴呆、脑卒中、房颤和住院时间>5周,保护性因素有英语背景。反复跌倒的患者的MMSE分值明显低于单次跌倒和未发生跌倒的患者(分别为17.3±6.7,20.2±6.2,24.0±5.1,P<0.01),反复跌倒患者在'瞬间记忆'、'注意力和计算力'和'视空间结构'方面分值明显低于单次跌倒患者。结论:认知功能障碍是住院老年患者反复跌倒的主要原因,尤其是在瞬间记忆、延时记忆和视空间结构方面。老年人住院期间跌倒应规范管理,预防为主,尤其是认知功能损伤的患者。王玉波 陈雪丽 Qing Shen Daniel KY Chan Huong Van Nguyen 2010中国康复医学杂志2010,25,8:12
5Temperature and Precipitation Suitability Evaluation for the Winter Wheat and Summer Maize Cropping System in the Huang-Huai-Hai Plain of China显示文摘The Huang-Huai-Hai Plain is the most important winter wheat and maize production region in China.In response to the increasing population pressure,the Chinese authorities strongly invested in improving the irrigation systems and increasing ground and surface water exploitation within the plain to increase the crop productivity.This resulted in a reduction of water resource availability and in turn indirectly affected the suitability of various agricultural ecosystems in the plain.The main purpose of this study was to review the suitability of temperature and precipitation for the winter wheat and summer maize cropping system in the Huang-Huai-Hai Plain,in order to provide a preliminary irrigation scheme.This analysis provides a first attempt to enhance the water resource management as well as to increase the water use efficiency.For this aim,a GIS-based multicriteria analysis procedure has been developed consisting of(1) definition of objectives(evaluated entities) and database building;(2) definition of evaluation criteria;(3) standardization of the criteria;(4) combination of the criteria;(5) classification of the objectives;and(6) integration of the objectives.The land suitability classification maps were transformed into maps of required irrigation amounts for each growing stage of the winter wheat and summer maize cropping system.The study also exemplified the limitations and proposed future research activities that will improve the detail and accuracy of the evaluation results.Nguyen Thanh Tuan QIU Jian-jun Ann Verdoodt LI Hu Eric Van Ranst 2011Agricultural Sciences in China2011,10,2:12
6摇臂式喷头内流道流场数值模拟显示文摘用Pro/E软件建立喷头内流道的三维实体模型,选择RNGk-ε模型在CFD软件Fluent中模拟了雨鸟30PSH型摇臂式喷头在10种入口压力和4种主喷嘴直径组合下的内流道流场,分析了喷头主副喷嘴的流量、入口压力与出口平均速度等参数的关系。研究结果表明:主喷嘴直径增大时,副喷嘴流量几乎不变;主、副喷嘴的流量分配比例由主喷嘴直径决定,与入口压力无关。入口压力增大,主喷嘴出口平均速度增大,但副喷嘴出口平均速度不变。喷头主、副喷嘴的平均湍动能随入口压力增大而增大,不受主喷嘴直径变化的影响。主喷嘴出口静压力、湍动能和速度的标准差、副喷嘴出口静压力标准差与入口压力近似成正比;而副喷嘴出口湍动能和速度的标准差随主喷嘴直径或入口压力增大产生较大的无规律变化。喷头内流道流场的可视化结果显示喷头副喷嘴与弯管连接处静压力较大,接近喷头入口静压力。韩文霆 Nguyen Van Lanh 徐琳 2011农业机械学报2011,42,8:11
7Behavior of noncircular tunnels excavated in stratified rock masses-Case of underground coal mines显示文摘The amount of tunnels excavated along stratified/sedimentary rock masses in Quangninh coal mine area,Vietnam, is gradually increasing. Rock mass in Quangninh is characterized by beddings between rock layers. The behavior of stratified rock masses surrounding the tunnels depends on both the intact rock and the beddings between rock layers. The main characteristics of stratified rock masses that need to be considered are their heterogeneity and anisotropy. Depending on the dip angle of rock layers, movements and failure zones developed surrounding the tunnels can be asymmetrical over the vertical axis of tunnel. This asymmetry causes adverse behaviors of the tunnel structures. The objective of this study is to highlight convergences and yielded zones developed in rock masses surrounding noncircular tunnels in Quangninh coal mine area using a finite element method. The presence of bedding joints is explicitly simulated. The numerical results indicated that with the increase in dip angle of bedding joints, the stress asymmetry over the tunnel vertical axis increases. It gradually leads to an asymmetry of the failure zone surrounding the tunnel. An increase of rock mass quality means a decrease of rock mass sensitivity to the discontinuities. In addition,a dip angle of the bedding joints of approximately 45° could be considered as the critical angle at which the rock mass mechanism changes between sliding and bending.Ngoc Anh Do Daniel Dias Van Diep Dinh Tien Tung Tran Van Canh Dao Viet Doan Dao Phuc Nhan Nguyen 2019Journal of Rock Mechanics and Geotechnical Engineering2019,11,1:9
8Dynamic Modeling of a Non-Uniform Flexible Tail for a Robotic Fish显示文摘Phi Luan Nguyen Van Phu Do Byung Ryong Lee 2013Journal of Bionic Engineering2013,10,2:9
9Genetic variants of interferon regulatory factor 5 associated with chronic hepatitis B infection显示文摘AIM To investigate possible effects of IRF5 polymorphisms in the 3' UTR region of the IFR5 locus on susceptibilityto hepatitis B virus(HBV) infection and progression of liver diseases among clinically classified Vietnamese patients.METHODS Four IFR5 SNPs(rs13242262 A/T, rs77416878 C/T, rs10488630 A/G, and rs2280714 T/C) were genotyped in clinically classified HBV patients [chronic hepatitis B(CHB). n = 99; liver cirrhosis(LC), n = 131; hepatocellular carcinoma(HCC), n = 149] and in 242 healthy controls by direct sequencing and Taq Man realtime PCR assays. RESULTS Comparing patients and controls, no significant association was observed for the four IFR5 variants. However, the alleles rs13242262 T and rs10488630 G contributed to an increased risk of liver cirrhosis(LC vs CHB: OR = 1.5, 95%CI: 1.1-2.3, adjusted P = 0.04; LC vs CHB: OR = 1.7, 95%CI: 1.1-2.6, adjusted P = 0.019). Haplotype IRF5*TCGT constructed from 4 SNPs was observed frequently in LC compared to CHB patients(OR = 2.1, 95%CI: 1.2-3.3, adjusted P = 0.008). Haplotype IRF5*TCAT occurred rather among CHB patients than in the other HBV patient groups(LC vs CHB: OR = 0.4, 95%CI: 0.2-0.8, adjusted P = 0.03; HCC vs CHB: OR = 0.3, 95%CI: 0.15-0.7, adjusted P = 0.003). The IRF5*TCAT haplotype was also associated with increased levels of ALT, AST and bilirubin. CONCLUSION Our study shows that IFR5 variants may contribute as a host factor in determining the pathogenesis in chronic HBV infections.Bui Tien Sy Nghiem Xuan Hoan Hoang Van Tong Christian G Meyer Nguyen Linh Toan Le Huu Song Claus-Thomas Bock Thirumalaisamy P Velavan 2018World Journal of Gastroenterology2018,24,2:9
10曝气结合投加微生物法去除河水氨氮效果研究显示文摘指出了传统河道曝气技术能在短时间内提高水体溶解氧浓度、消除河道黑臭状态,在河道水质改善方面具有一定的可行性和优越性。基于此,尝试将投加微生物工程菌法与河道曝气技术有机结合,研发了去除河水中COD和NH_3-N的长期效果更好的组合工艺。以新河支流水生态修复项目为例,研究表明:投加微生物工程菌法与河道曝气技术对水去除COD、NH_3-N与增加微生物群落的效果显著。Tang Van Tai Tran Ngoc Binh Nguyen Nhu Anh PhanThi Hong Nhung 2017绿色科技2017,19,6:8
11Dynamic Modeling and Experiment of a Fish Robot with a Flexible Tail Fin显示文摘Phi Luan Nguyen Van Phu Do Byung Ryong Lee 2013Journal of Bionic Engineering2013,10,1:8
12High-resolution, in vivo multimodal photoacoustic microscopy, optical coherence tomography, and fluorescence microscopy imaging of rabbit retinal neovascularization显示文摘Photoacoustic microscopy(PAM)is an emerging imaging technology that can non-invasively visualize ocular structures in animal eyes.This report describes an integrated multimodality imaging system that combines PAM,optical coherence tomography(OCT),and fluorescence microscopy(FM)to evaluate angiogenesis in larger animal eyes.High-resolution in vivo imaging was performed in live rabbit eyes with vascular endothelial growth factor(VEGF)-induced retinal neovascularization(RNV).The results demonstrate that our multimodality imaging system can noninvasively visualize RNV in both albino and pigmented rabbits to determine retinal pathology using PAM and OCT and verify the leakage of neovascularization using FM and fluorescein dye.This work presents high-resolution visualization of angiogenesis in rabbits using a multimodality PAM,OCT,and FM system and may represent a major step toward the clinical translation of the technology.Wei Zhang Yanxiu Li Van Phuc Nguyen Ziyi Huang Zhipeng Liu Xueding Wang Yannis M.Paulus 2018Light(Science & Applications)2018,7,1:7
13不同林分下胖大海幼树幼苗更新分布格局显示文摘以越南东南部胖大海天然更新林为研究对象,运用6个聚集度指标分析不同林分优势度和郁闭度等级下胖大海幼树幼苗更新3个阶段的空间分布格局特征,并运用Iwao回归方程和Taylor幂法则模型进行检验,比较胖大海的出现相对频率(Ey)在不同林分优势度和郁闭度等级下的差异性。结果表明:胖大海幼树幼苗的空间分布型呈聚集分布型;不同林分优势度和郁闭度等级对胖大海幼树幼苗更新的影响在第2、第3阶段的Ey存在显著性差异,而在第1阶段差异性不显著;胖大海在优势度低级的Ey,在第1阶段分别是优势度中级和高级的1.05和1.17倍,在第2阶段为优势度高级的30%,在第3阶段分别为优势度中级和高级的99%和31%;胖大海在郁闭度1级的Ey,在第1阶段分别是郁闭度2、3和4级的85%、1.32倍和75%,在第2阶段分别是郁闭度2、3和4级的1.80、1.97倍和69%,在第3阶段依次为郁闭度2、3和4级的1.29、1.10倍和43%。胖大海幼树幼苗基本适应高郁闭度林分,对光照强度要求较低。PHAM Van huong 陈昌雄 洪伟 巢林 NGUYEN Ba trieu 张巧巧 2015森林与环境学报2015,35,4:7
14Stem cell-based therapy for human diseases显示文摘Recent advancements in stem cell technology open a new door for patients suffering from diseases and disorders that have yet to be treated.Stem cell-based therapy,including human pluripotent stem cells(hPsCs)and multipotent mesenchymal stem cells(MSCs),has recently emerged as a key player in regenerative medicine.hPSCs are defined as self-renewable cell types conferring the ability to differentiate into various cellular phenotypes of the human body,including three germ layers.MsCs are multipotent progenitor cells possessing self-renewal ability(limited in vitro)and differentiation potential into mesenchymal lineages,according to the International Society for Cell and Gene Therapy(ISCT).This review provides an update on recent clinical applications using either hPSCs or MSCs derived from bone marrow(BM),adipose tissue(AT),or the umbilical cord(UC)for the treatment of human diseases,including neurological disorders,pulmonary dysfunctions,metabolic/endocrine-related diseases,reproductive disorders,skin burns,and cardiovascular conditions.Moreover,we discuss our own clinical trial experiences on targeted therapies using MsCs in a clinical setting,and we propose and discuss the MSC tissue origin concept and how MSC origin may contribute to the role of MSCs in downstream applications,with the ultimate objective of facilitating translational research in regenerative medicine into clinical applications.The mechanisms discussed here support the proposed hypothesis that BM-MSCs are potentially good candidates for brain and spinal cord injury treatment,AT-MSCs are potentially good candidates for reproductive disorder treatment and skin regeneration,and UC-MsCs are potentially good candidates for pulmonary disease and acute respiratory distress svndrometreatment.Duc M.Hoang Phuong T.Pham Trung Q.Bach Anh T.L.Ngo Quyen T.Nguyen Trang T.K.Phan Giang H.Nguyen Phuong T.T.Le Van T.Hoang Nicholas R.Forsyth Michael Heke Liem Thanh Nguyen 2022Signal Transduction and Targeted Therapy2022,7,9:7
15基于三维动力学模型的重型卡车动态参数对平顺性的影响显示文摘为了研究重型卡车动态参数对驾驶员舒适性的影响,以路面随机不平度为激扰,以驾驶室座椅垂向、驾驶室的俯仰角和侧倾角的加权加速度均方根值为目标函数,建立了13自由度的三维动力学模型.采用Matlab/Simulink软件对整车模型进行仿真计算,分析了不同系统参数,如悬架、轮胎、驾驶室悬架和驾驶员座椅悬架的参数对驾驶员座椅垂向振动、驾驶室前后和左右晃动的影响.研究结果表明:悬架系统中刚度和阻尼参数的最佳匹配对车辆平顺性的影响非常明显;随着悬架系统和轮胎刚度的增加,车辆平顺性从优向劣转变,而随着悬架系统阻尼的增加,车辆平顺性呈现从劣转优现象.该研究为重型卡车悬架系统设计提供相应的理论依据.Le Van Quynh 张建润 王园 孙小娟 Nguyen Van Liem 2013东南大学学报(自然科学版)2013,43,4:6
16Osteoprotegerin: A Novel Secreted Protein Involved in the Regulation of Bone Density显示文摘W.S Simonet D.L Lacey C.R Dunstan M Kelley M.-S Chang R Lüthy H.Q Nguyen S Wooden L Bennett T Boone G Shimamoto M DeRose R Elliott A Colombero H.-L Tan G Trail J Sullivan E Davy N Bucay L Renshaw-Gegg T.M Hughes D Hill W Pattison P Campbell S Sander G Van 1997Cell1997,,2:6
17黄瓜(Cucumis Sativus L.)花药培养显示文摘以卡罗尔、HH1-8-57与津绿农家乐3个不同基因型黄瓜品种为试材,在Kumar等、Song等和詹艳等试验研究基础上,设计试验分别探讨低温预处理时间、培养基成分(胚性愈伤组织诱导培养基、胚状体诱导培养基)和基因型等因素对黄瓜花药培养的影响。结果表明:在4℃低温预处理2d时,胚性愈伤组织诱导率显著高于其他处理;在MS+1.0mg·L-12,4-D+0.5mg·L-16-BA+3%蔗糖+0.8%琼脂培养基上胚性愈伤组织诱导率最高,达到81.3%;在MS+0.1mg·L-1NAA+3.0mg·L-16-BA+3%蔗糖+0.8%琼脂培养基上胚状体诱导率最高,为40.0%;基因型间胚性愈伤组织诱导率及胚状体诱导率差异显著,津绿农家乐品种胚性愈伤组织诱导率最高,达到81.1%,HH1-8-57胚状体诱导率最高,为40.0%。本研究从2份试材中成功地诱导出胚状体并获得了黄瓜单倍体再生植株。Nguyen Thi Thanh Van 陈劲枫 2012中国瓜菜2012,25,2:5
18咖啡中丙烯酰胺检测方法及含量研究进展显示文摘由于丙烯酰胺对人体有神经毒性和潜在的致癌性,在美国,咖啡烘焙、咖啡粉末和速溶咖啡中丙烯酰胺都有限量。目前测定咖啡中丙烯酰胺的方法较多,每种方法各有利弊。主要介绍测定咖啡中丙烯酰胺的4种方法:气相色谱法,高效液相色谱法,气相色谱串联质谱法和液相色谱串联质谱法。总结在各种类咖啡中丙烯酰胺含量检测方法的最新进展。Tran Van Cuong 郭康权 鲁海霞 Nguyen Minh Phuong 2016食品研究与开发2016,37,7:5
19灌草对胖大海种群更新幼树幼苗密度的影响显示文摘通过对越南同奈天然文化自然保护区天然阔叶和半落叶林中灌木高度和盖度以及草本盖度对胖大海幼树幼苗密度大小影响的研究,探讨灌木草本对胖大海种群更新及其可持续发展的影响。结果表明:灌木盖度对胖大海幼树幼苗更新密度有显著影响,在3个优势度等级林分随着灌木盖度的逐渐增加,胖大海幼树幼苗更新密度呈单调下降,灌木高度与胖大海幼树幼苗密度的回归关系符合模型:y=a+bx+cx^2;不同灌木盖度和高度等级与胖大海更新幼树幼苗密度呈显著相关,优势度一级和二级林分中灌木高度在300~400 cm且盖度<40%,胖大海幼树幼苗密度为2 500~3 000株/hm^2;当灌木高度<200 cm且其盖度在70%以上时,胖大海幼树幼苗密度为500~1 000株/hm^2;优势度三级林分中灌木高度300~400 cm和盖度<40%时,胖大海幼树幼苗密度为3 000~4 000株/hm2;胖大海幼树幼苗密度随着草本盖度的增加而逐渐下降,3个优势度等级林分胖大海幼树幼苗密度和草本盖度的回归模型为:y=a×exp(-bx);胖大海幼树幼苗更新密度受草本盖度和灌木盖度因素综合作用影响,回归关系符合模型:y=a+b_1x_1+b_2x_2+c_1x_1~2+c_2x_2~2+dx_1x_2,灌木盖度低等级和草本盖度<30%,幼树幼苗密度最高值为2 500~3 000株/hm^2,灌木盖度增高和草本盖度为80%以上,密度为500株/hm^2以下,灌木草本盖度增加以及灌木高度较低不利于胖大海幼树幼苗的更新。因此,胖大海天然更新培育或人工林经营中,应注意清除灌木、草本,为胖大海幼树幼苗生长提供适宜的环境,促进胖大海幼树幼苗存活与生长。Pham Van Huong 陈昌雄 张巧巧 Hoang Van Tung 范先明 Nguyen Huu Duy 2016西南林业大学学报(自然科学)2016,36,4:5
20拌和与成型温度对SMA-16混合料性能影响研究显示文摘为明确施工温度对SMA-16混合料路面性能的影响,并为SMA-16路面施工的合理拌和及碾压成型温度提供技术依据,研究不同温度条件下沥青与矿料的粘附性;同时拟定4个拌和温度、2个成型温度,研究不同温度条件下SMA-16混合料的毛体积密度、孔隙率、马歇尔稳定性、水稳定性和高低温性能的变化。结果表明:加热温度为170~185℃时玄武岩粗集料与SBS改性沥青的裹覆性最好;拌和温度对木质素纤维SMA混合料高温稳定性的影响比较大,对水稳定性和低温稳定性的影响不明显;拌和温度为175~185℃时,木质素纤维SMA混合料的高温稳定性、低温变形性能和水稳定性最好。程培峰 NGUYEN Hoang Phong 郝中华 李吉庭 DANG Van Thanh 2017新型建筑材料2017,44,7:4
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