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| 1 | 一种中高速区转矩优化的异步电机直接转矩控制算法显示文摘提出一种在异步电机基速内转矩性能优化的直接转矩控制(direct torque control,DTC)算法。该算法在中高速段采用连续定子磁链轨迹切换技术实现了各段定子磁链轨迹平滑切换。随着电机转子速度的升高,定子磁链轨迹依次从圆形、多边形及六边形连续与平滑地切换,算法具有电机转矩脉动小,电机转矩平稳等特点;在高速区段,给出一种非零电压矢量提前注入的控制方案,实现了减小转矩向下脉动,因此有效提高了转矩平均值与转矩平稳性。该DTC算法仅需在传统DTC结构中增加调节定子磁链和调节电压矢量作用时刻算法,既保留了传统DTC算法快速动态响应,以及对电机转子参数不敏感等特征,又确保控制系统较低的计算量要求。理论分析和实验结果都证明了该DTC算法的有效性和可行性。 | 范文进 郑琼林 杨中平 林飞 宋文胜 DO Viet Dung | 2016 | 中国电机工程学报2016，36，1： | 19 |
| 2 | Deep Learning Based Single Image Super-resolution:A Survey显示文摘Single image super-resolution has attracted increasing attention and has a wide range of applications in satellite imaging, medical imaging, computer vision, security surveillance imaging, remote sensing, objection detection, and recognition. Recently, deep learning techniques have emerged and blossomed, producing ' the state-of-the-art” in many domains. Due to their capability in feature extraction and mapping, it is very helpful to predict high-frequency details lost in low-resolution images. In this paper, we give an overview of recent advances in deep learning-based models and methods that have been applied to single image super-resolution tasks. We also summarize, compare and discuss various models from the past and present for comprehensive understanding and finally provide open problems and possible directions for future research. | Viet Khanh Ha Jin-Chang Ren Xin-Ying Xu Sophia Zhao Gang Xie Valentin Masero Amir Hussain | 2019 | International Journal of Automation and computing2019，16，4： | 17 |
| 3 | Stable 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 | 2012 | Journal of Bionic Engineering2012，9，4： | 16 |
| 4 | BP神经网络在截齿合金头失效识别中的应用显示文摘为实现采煤机截割过程中截齿合金头失效形式的监测和识别,提出一种基于BP神经网络的多特征信号识别截齿合金头失效形式的方法。测试提取截割过程中合金头龟裂、合金头脱落、合金头崩刃和合金头严重磨损4种截齿x,y,z三个方向上的振动特征信号和截割电机电流特征信号,选取特征值信号的最大值、均值和方差作为特征样本对BP神经网络进行学习和训练,建立截齿合金头失效形式的识别模型,实现截割过程中截齿合金头失效形式在线监测与准确识别。实验结果表明,BP神经网络的判别结果和测试样本的实际失效类型相符,能够对截齿合金头失效形式进行准确识别,为实现采煤机截齿在线监测和失效形式识别提供新的方法和手段。 | 张强 刘志恒 王海舰 田莹 NGUYEN Viet Tuyen | 2018 | 振动.测试与诊断2018，38，3： | 12 |
| 5 | Behavior 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 | 2019 | Journal of Rock Mechanics and Geotechnical Engineering2019，11，1： | 9 |
| 6 | 李赛美教授运用经方经验介绍显示文摘李赛美是广州中医药大学教授、主任医师、博士研究生号师、《伤寒论》教研室主任。擅用经方治疗糖尿病、甲亢、朋病等疑难病症,积累了丰富的临床经验。笔者有幸随师侍诊,受益良多。兹择二三,以飨读者。 | 阮氏心顺(NGUYEN THI TAM THUAN) 阮氏甘(NGUYEN VIET CAM) 王保华 李赛美(指导) | 2007 | 新中医2007，39，3： | 9 |
| 7 | A novel memristive neural network with hidden attractors and its circuitry implementation显示文摘Neural networks have been applied in various fields from signal processing, pattern recognition, associative memory to artificial intelligence. Recently, nanoscale memristor has renewed interest in experimental realization of neural network. A neural network with a memristive synaptic weight is studied in this work. Dynamical properties of the proposed neural network are investigated through phase portraits, Poincaré map, and Lyapunov exponents. Interestingly, the memristive neural network can generate hyperchaotic attractors without the presence of equilibrium points. Moreover, circuital implementation of such memristive neural network is presented to show its feasibility. | PHAM Viet Thanh JAFARI Sajad VAIDYANATHAN sundarapandian VOLOS Christos WANG Xiong | 2016 | Science China(Technological Sciences)2016，59，3： | 9 |
| 8 | Accuracy assessment of mine walls' surface models derived from terrestrial laser scanning显示文摘 | Nguyen Quoc Long Michal M. Buczek La Phu Hien Sylwia A. Szlapinska Bui Xuan Nam Nguyen Viet Nghia Cao Xuan Cuong | 2018 | International Journal of Coal Science & Technology2018，5，3： | 6 |
| 9 | Improvement of Artificial Foldable Wing Models by Mimicking the Unfolding/Folding Mechanism of a Beetle Hind Wing显示文摘In an attempt to realize a flapping wing micro-air vehicle with morphing wings, we report on improvements to our previousfoldable artificial hind wing.Multiple hinges, which were implemented to mimic the bending zone of a beetle hind wing, weremade of small composite hinge plates and tiny aluminum rivets.The buck-tails of rivets were flared after the hinge plates wereassembled with the rivets so that the folding/unfolding motions could be completed in less time, and the straight shape of theartificial hind wing could be maintained after fabrication.Folding and unfolding actions were triggered by electrically-activatedShape Memory Alloy (SMA) wires.For wing folding, the actuation characteristics of the SMA wire actuator were modifiedthrough heat treatment.Through a series of flapping tests, we confirmed that the artificial wings did not fold back and arbitrarilyfluctuate during the flapping motion. | Azhar Muhammad Quoc Viet Nguyen Hoon Cheol Park Do Y.Hwang Doyoung Byun Nam Seo Goo | 2010 | Journal of Bionic Engineering2010，7，2： | 6 |
| 10 | 热电厂炉渣作为煤矿膏体充填材料的配比试验研究显示文摘为了寻求既满足充填工艺要求又能够降低成本的新型充填材料,通过一系列试验,研究了热电厂粉煤灰/炉渣比例、膏体质量浓度和水泥含量等因素对膏体充填材料性能的影响规律,据此确定了材料最优配比。结果表明:随着粉煤灰/炉渣比例的增加,坍落度、扩展度和充填体强度均呈现先较大幅度增加然后又缓慢减小的变化趋势,料浆泌水率呈近似负指数规律降低;随着质量浓度的增加,坍落度、扩展度及泌水率均随之显著变小,充填体强度近线性增大;随着水泥含量的增加充填体强度随之显著增大,坍落度、扩展度和泌水率均呈现缓慢减小的变化趋势;材料的最优配比为粉煤灰、炉渣和水泥的质量比为20∶48∶6,质量浓度为74%,此时料浆流动性和充填体强度完全符合充填开采基本要求。 | Phan Van Viet 王东 | 2018 | 中国安全生产科学技术2018，14，1： | 6 |
| 11 | 基于刨煤机单刨刀截割试验的截割阻力模型研究显示文摘根据刨煤机刨刀截割煤岩阻力谱以及截割机理,辨识出刨头破碎煤岩的所受截割阻力,提出了基于单刨刀截割阻力、刨刀截割规律及运行参数来确定刨头瞬时截割阻力方法,建立刨头截割阻力试验-理论综合模型,给出了截割阻力模型算法。结果表明:当煤岩阻抗为225 N/cm、崩落角为30°、刨刀数量为14把时,刨头上的刨削阻力达到最大96.86 k N,变差系数达到最小0.509 53,载荷波动较小,有利于刨头刨削煤体,理论分析与试验结果基本吻合,截割阻力的特征和量值均有很好的复合度,单刨刀截割试验可反映出煤岩破碎的内在规律。 | 刘芮葭 Chu Viet Dung Nguyen Viet Tuyen | 2016 | 煤炭科学技术2016，44，6： | 6 |
| 12 | Occurrence of emerging flame retardants from e-waste recycling activities in the northern part of Vietnam显示文摘This study investigated the contamination status of 21 emerging flame retardants(FRs)in soils(n=32)and river sediments(n=8)from an e-waste recycling(EWR)site in the northern part of Vietnam.Among analyzed FRs,higher levels of decabromodiphenyl ethane(DBDPE)(NDe4200 ng/g dw),1,2-bis-(2,4,6-tribromophenoxy)ethane(BTBPE)(NDe350 ng/g dw)and Dechlorane Plus isomers(DPs)(NDe65 ng/g dw)were found in soils near EWR workshops and open burning places.The highest concentrations of DBDPE(20 ng/g dw),BTBPE(5.7 ng/g dw)and DPs(6.7 ng/g dw)were also detected in sediments collected from the middle of the EWR site.The levels decreased concomitantly with increasing distance from the EWR site.These results indicate that these FRs were released to the surrounding environment from improper recycling activities,such as manual dismantling of devices and open burning of e-wastes.Moreover,the estimated daily intakes of those FRs via soil ingestion were approximately ten times higher for children than adults.To our knowledge,this is a first comprehensive study on characterization of soil and sediment contamination by a series of emerging FRs at an EWR site in Vietnam. | Masayuki Someya Go Suzuki Alin C.Ionas Nguyen Minh Tue Fuchao Xu Hidenori Matsukami Adrian Covaci Le Huu Tuyen Pham Hung Viet Shin Takahashi Shinsuke Tanabe Hidetaka Takigami | 2016 | Emerging Contaminants2016，2，2： | 5 |
| 13 | Analysis of monomeric and oligomeric organophosphorus flame retardants in fish muscle tissues using liquid chromatographyeelectrospray ionization tandem mass spectrometry:Application to Nile tilapia(Oreochromis niloticus)from an e-waste processing area in northern Vietnam显示文摘Using electrospray ionization tandem mass spectrometry combined with liquid chromatography(LC),a novel analytical method was developed to quantify eight monomeric organophosphorus flame retardants(m-PFRs)and three oligomeric organophosphorus flame retardants(o-PFRs)in fish muscle samples.The optimization and validation experiments indicate that the developed method can determine accurately the concentrations of analytes in fish muscle samples.The recoveries of analytes in fish muscle samples were in the range of 74-105%.The coefficients of variation of the concentrations of analytes in fish muscle samples were 0.6-8.9%.The concentrations of analytes in procedural blanks were below the limit of quantification(LOQ)values.Furthermore,the developed method was applied to the analysis of m-PFRs and o-PFRs in the muscle samples of tilapias collected from an electronic waste(ewaste)processing area in northern Vietnam.The concentrations of m-PFRs such as tris(2-chloroethyl)phosphate(TCEP),tris(2-chloroisopropyl)phosphate(TCIPP),and triphenyl phosphate(TPHP)were dominant among the investigated m-PFRs.The respective concentrations of TCEP,TCIPP,and TPHP were up to 160,300,and 230 ng g^-1 lipid weight,respectively,whereas those of o-PFRs were up to 10 ng g^-1 lipid weight.The results of this study indicate lower accumulation potential of o-PFRs compared with m-PFRs for the first time. | Hidenori Matsukami Go Suzuki Nguyen Minh Tue Le Huu Tuyen Pham Hung Viet Shin Takahashi Shinsuke Tanabe Hidetaka Takigami | 2016 | Emerging Contaminants2016，2，2： | 5 |
| 14 | 日粮添加乳酸菌复合物或乳酸菌、枯草芽孢杆菌(BacillussubtiLis)、酵母(SaccharomycesbouLardii)混合物对断奶仔猪生长、消化、肠道环境和健康的影响显示文摘本实验考察了基础对照组日粮(C)或添加乳酸菌、芽孢杆菌、酵母的日粮(L,LB,LBS)对断奶仔猪(26~28日龄)生长、消化、肠道环境和健康的影响.实验组日粮L在基础日粮基础上添加乳酸菌复合物LAB[包括:肠球菌6H2(Enterococcus faecium),嗜酸乳杆菌C3(Lactobacillus acidophilus),戊糖片球菌D7(Pediococcus pentosaceus),发酵乳杆菌NC1(L.fermentum)].实验组日粮LB在基础日粮基础上添加乳酸菌复合物LAB和枯草芽孢杆菌H4(Bacillus subtilis),实验组日粮LBS在基础日粮基础上添加乳酸菌复合物LAB、枯草芽孢杆菌H4和酵母Sb(Saccharomyces boulardii).实验结果表明,相比对照组C,摄食实验组L、LB、LBS组日粮的仔猪采食量和日增重较高,饲料转化效率较低,回肠和总消化道营养物质的消化率较高,且降低了仔猪腹泻的发病率,同时粪便得分值低(P<0.01).仔猪摄食L、LB、LBS组的日粮促进了肠道乳酸菌菌群增殖和有机酸的生成,同时降低了肠道大肠杆菌数量.相比实验组L,实验组LBS仔猪对营养物质的消化率增加较实验组L或LB而言,实验组LBS仔猪的腹泻概率较小,粪便得分值较低.本实验条件下,在越南地区,日粮添加乳酸菌复合物起到益生菌的作用,有利于促进断奶仔猪的健康. | 聂琴 陈中平 李彪翻 邵建忠 Hoang Huong Giang Tran Quoc Viet Brian Ogle Jan Erik Lindberg | 2013 | 国外畜牧学(猪与禽)2013，，11： | 5 |
| 15 | 构造应力场中巷道围岩破坏机理研究显示文摘针对构造应力场中巷道围岩变形破坏基本特征,采用FLAC3D数值计算软件,依次分析侧压系数、内摩擦角、黏聚力对矩形巷道周边应力分布、位移和塑性区扩展的影响。结果表明:侧压系数对巷道围岩变形破坏具有敏感性,随着侧压系数的增大,巷道两帮移近量呈现正比增加的趋势且明显大于顶底移近量;内摩擦角在一定的取值范围内,与巷道围岩塑性区变化存在着负相关性,但是当其增大到相对的临界点(30°≤φ≤35°)时,塑性区的变化将不再明显;当黏聚力增大到一定程度(C=5.0MPa)时,巷道围岩塑性区的变化将保持在一个相对稳定的水平。在此基础上提出高强让压支护的基本思路,开发了'多孔循环注浆,深浅孔结合'工艺,在工程实践中取得较好效果。 | 赵红超 张东升 刘洪林 吕金星 DAO VIET DOAN 温颖远 | 2014 | 煤矿开采2014，19，2： | 5 |
| 16 | Sorption of biodegradation end products of nonylphenol polyethoxylates onto activated sludge显示文摘Nonylphenol(NP), nonylphenoxy acetic acid(NP1EC), nonylphenol monoethoxy acetic acid(NP2EC), nonylphenol monoethoxylate(NP1EO) and nonylphenol diethoxylate(NP2EO) are biodegradation end products(BEPs) of nonionic surfactant nonylphenolpolyethoxylates (NPnEO). In this research, sorption of these compounds onto model activated sludge was characterized. Sorption equilibrium experiments showed that NP, NP1EO and NP2EO reached equilibrium in about 12 h, while equilibrium of NP1EC and NP2EC were reached earlier, in about 4 h. In sorption isotherm experiments, obtained equilibrium data at 28℃ fitted well to Freundlich sorption model for all investigated compounds. For NP1EC, in addition to Freundlich, equilibrium data also fitted well to Langmuir model. Linear sorption model was also tried, and equilibrium data of all NP, NP1EO, NP2EO and NP2EC except NP1EC fitted well to this model. Calculated Freundlich coefficient(K F) and linear sorption coefficient(K D) showed that sorption capacity of the investigated compounds were in order NP>NP2EO>NP1EO>NP1EC≈NP2EC. For NP, NP1EO and NP2EO, high values of calculated K F and K D indicated an easy uptake of these compounds from aqueous phase onto activated sludge. Whereas, NP1EC and NP2EC with low values of K F and K D absorbed weakly to activated sludge and tended to preferably remain in aqueous phase. | Nguyen Viet Hung Masafumi Tateda Michihiko Ike Masanori Fujita Shinji Tsunoi Minoru Tanaka | 2004 | Journal of Environmental Sciences2004，16，4： | 4 |
| 17 | 异步电机牵引特性的仿真研究显示文摘按照异步牵引电机特性,建立起直接转矩控制系统的仿真模型。在启动时,逆变器按脉宽调制方式进行控制,当电机输出功率达到额定值时,进入方波控制区;为有效地抑制系统在启动初始过程中产生很大电流冲击,采用启动限流措施,防止定子磁链发生畸变和开关器件损坏。仿真模拟了异步牵引电机在运行过程中牵引和制动工况,Matlab/Simulink仿真结果表明系统具有良好的稳态性能和动态性能,满足机车运行的要求。仿真结果验证了控制方法的有效性和正确性。 | Pham Van Tien 冯晓云 ■o Viet Dung 葛兴来 | 2009 | 电气传动2009，39，5： | 4 |
| 18 | Verification of Beam Models for Ionic Polymer-Metal Composite Actuator显示文摘Ionic Polymer-Metal Composite (IPMC) can work as an actuator by applying a few voltages.A thick IPMC actuator,whereNafion-117 membrane was synthesized with polypyrrole/alumina composite filler,was analyzed to verify the equivalent beamand equivalent bimorph beam models.The blocking force and tip displacement of the IPMC actuator were measured with a DCpower supply and Young’s modulus of the IPMC strip was measured by bending and tensile tests respectively.The calculatedmaximum tip displacement and the Young’s modulus by the equivalent beam model were almost identical to the correspondingmeasured data.Finite element analysis with thermal analogy technique was utilized in the equivalent bimorph beam model tonumerically reproduce the force-displacement relationship of the IPMC actuator.The results by the equivalent bimorph beammodel agreed well with the force-displacement relationship acquired by the measured data.It is confirmed that the equivalentbeam and equivalent bimorph beam models are practically and effectively suitable for predicting the tip displacement,blockingforce and Young’s modulus of IPMC actuators with different thickness and different composite of ionic polymer membrane. | Hoon Cheol Park Quoc Viet Nguyen Jang Woo Lee Young Tai Yoo | 2009 | Journal of Bionic Engineering2009，6，3： | 3 |
| 19 | Univector field method-based multi-agent navigation for pursuit problem in obstacle environments显示文摘The pursuit problem is a well-known problem in computer science. In this problem, a group of predator agents attempt to capture a prey agent in an environment with various obstacle types, partial observation, and an infinite grid-world. Predator agents are applied algorithms that use the univector field method to reach the prey agent, strategies for avoiding obstacles and strategies for cooperation between predator agents. Obstacle avoidance strategies are generalized and presented through strategies called hitting and following boundary(HFB); trapped and following shortest path(TFSP); and predicted and following shortest path(PFSP). In terms of cooperation, cooperation strategies are employed to more quickly reach and capture the prey agent. Experimental results are shown to illustrate the efficiency of the method in the pursuit problem. | Le Pham Tuyen Hoang Huu Viet Sang Hyeok An Seung Gwan Lee Dong-Han Kim Tae Choong Chung | 2017 | Journal of Central South University2017，24，4： | 3 |
| 20 | Spectral wave transformation model for simulating refrac-tion-diffraction with strongly reflecting coastal structures显示文摘On the basis of the wave action balance equation which incorporates refraction,diffraction,reflection and wave-current interaction,a directional spectral wave transformation model WABED is developed for predicting the irregular wave refraction-diffraction with strongly reflecting structures in coastal regions.In the model,diffraction is taken into account by introducing a term formulated from a parabolic approximation wave equation,and reflection is calculated through a back-marching numerical approach at the reflecting boundary.Two experimental data sets are used to examine the performance of present model with regard to wave characteristics around reflecting coastal structures.One is from a physical experiment at idealized inlet with parallel jetties,while the other is from a laboratory study on a coastal project of the concave breakwater.Reasonably good agreements are found for both cases,revealing the applicability of the present model for predicting combined wave refraction-diffraction processes with strongly reflecting coastal structures. | ZHENG Jinhai NGUYEN Viet Thanh ZHANG Chi | 2011 | Acta Oceanologica Sinica2011，30，2： | 3 |
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