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Journal of Agricultural Chemistry and Environment 2019年第2期8卷 69-77页

作者： t.uong thi Cam trang nguyen quang Huy takaomi Kobayashi Faculty of Environment Science VNU-HCM University of Science Ho Chi Minh City Vietnam Department of International Cooperation Ministry of Natural Resources and Environment Hanoi Vietnam Department of Science of technology Innovation Nagaoka University of Technology Niigata Japan

Chitosan/coconut (CtS/coconut) composite membranes were successfully prepared by the cross-linking reaction with glutaraldehyde and they were applied in eliminating heavy metals from aqueous solutions. the cross-linked membranes were obtained at the ratios of 1/1, 1/1.5 and 1/2 and the coconut fiber was chemically treated by NaOCl/NaOH. the best ratio of CtS/coconut fiber is found to be 1/1.5 which has a relatively high stability with the degree of swelling (DS) and solvent content (SC) of membrane to be 13.33% and 69.88%, respectively. the results also indicate that the CtS membranes showed preferential separation of heavy metals for blend CtS/coconut membranes.

关键词： Crab Shell Membrane technology Chitosan Coconut Fiber Heavy Metal

Mean-field description of heavy-ion scattering at low energies and fusion

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Nuclear Science and techniques 2018年第12期29卷 102-111页

作者： Dao t.Khoa Le Hoang Chien Do Cong Cuong nguyen Hoang Phuc Institute for Nuclear Science and technology VINATOM Department of Nuclear Physics and Nuclear Engineering Faculty of Physics and Engineering Physics University of Science VNU-HCM

the nuclear mean-field potential built up during the ^(12)C+^(12)C and ^(16)O+^(16)O collisions at low energies relevant for the carbon-and oxygen-burning processes is constructed within the double-folding model(DFM) using the realistic ground-state densities of^(12)C and^(16)O, and CDM3Yn density-dependent nucleon–nucleon(NN) interaction. the rearrangement term, indicated by the Hugenholtz–van Hove theorem for the single-particle energy in nuclear matter, is properly considered in the DFM calculation. to validate the use of the density-dependent NN interaction at low energies, an adiabatic approximation was suggested for the dinuclear overlap density. the reliability of the nucleus–nucleus potential predicted through this low-energy version of the DFM was tested in the optical model(OM) analysis of the elastic^(12)C+^(12)C and ^(16)O+^(16)O scattering data at energies below 10 MeV/*** OM results provide a consistently good description of the elastic angular distributions and 90 excitation function. the dinuclear mean-field potential predicted by the DFM is further used to determine the astrophysical S factor of the ^(12)C+^(12)C and ^(16)O+^(16)O fusions in the barrier penetration model. Without any adjustment of the potential strength, our results reproduce the non-resonant behavior of the S factor of the ^(12)C+^(12)C and ^(16)O+^(16)O fusions very well over a wide range of energies.

关键词：精力熔化散布重离子状态密度密度依赖相互作用天体物理学

Reinforcement Learning Based Controller Synthesis for Flexible Aircraft Wings

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IEEE/CAA Journal of Automatica Sinica 2014年第4期1卷 435-448页

作者： Manoj Kumar Karthikeyan Rajagopal Sivasubramanya Nadar Balakrishnan Nhan t.nguyen the Missouri University of Science&technology the NASA Ames Research Center Moffet Field

Aeroelastic study of flight vehicles has been a subject of great interest and research in the last several years. Aileron reversal and flutter related problems are due in part to the elasticity of a typical airplane. Structural dynamics of an aircraft wing due to its aeroelastic nature are characterized by partial differential equations. Controller design for these systems is very complex as compared to lumped parameter systems defined by ordinary differential equations. In this paper, a stabilizing statefeedback controller design approach is presented for the heave dynamics of a wing-fuselage model. In this study, a continuous actuator in the spatial domain is assumed. A control methodology is developed by combining the technique of “proper orthogonal decomposition” and approximate dynamic programming. the proper orthogonal decomposition technique is used to obtain a low-order nonlinear lumped parameter model of the infinite dimensional system. then a near optimal controller is designed using the single-network-adaptive-critic technique. Furthermore,to add robustness to the nominal single-network-adaptive-critic controller against matched uncertainties, an identifier based adaptive controller is proposed. Simulation results demonstrate the effectiveness of the single-network-adaptive-critic controller augmented with adaptive controller for infinite dimensional systems.

关键词： Adaptation models Adaptive control Aircraft Atmospheric modeling Cost function Learning (artificial intelligence) Method of moments Optimal control Single-network-adaptive-critic adaptive control adaptive critic flexible wing partial differential equation proper orthogonal decomposition uncertainty MEtHOD OF MOMENtS flexible airfoils Optimal control Wings adaptive controller Learning Atmospheric models Partial differential equations Differential equations Control Methods adaptive control Aircraft flexible air vehicles Cost functions Adaptation models

Let there be light： a bright future for Ca2＋ signaling

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Science Bulletin 2018年第16期63卷 1029-1031页

作者： Guolin Ma Jindou Liu Nhung t. nguyen Yubin Zhou Youjun Wang Center for translational Cancer Research Institute of Biosciences and Technology College of Medicine Texas A&M University Houston TX 77030 USA Beijing Key Laboratory of Gene Resource and Molecular Development College of Life Sciences Beijing Normal University Beijing 100875 China

Calcium ion(Ca^(2+))is a ubiquitous second messenger in eukaryotic *** response to electrical,hormonal,or mechanical stimulation,cytosolic Ca^(2+)levels increase due to Ca^(2+) influxes through ion channels embedded i... 详细信息

关键词： Ca2+ 信号控制真核细胞肌肉收缩新陈代谢钙离子细胞内神经质

Numerical investigation of the influence of casting techniques on fiber orientation distribution in ECC

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Frontiers of Structural and Civil Engineering 2022年第11期16卷 1424-1435页

作者： Chung nguyen VAN Hai tRAN tHANH thuc Nhu nguyen Jianchun LI Faculty of Civil Engineering Ho Chi Minh City University of Technology and EducationHo Chi Minh 721400Vietnam School of Civil and Environmental Engineering University of Technology SydneySydneyNSW 2007Australia School of Civil Engineering Hue Industrial CollegeHue 49120Vietnam

Engineered cementitious composites(ECC),also known as bendable concrete,were developed based on engineering the interactions between fibers and cementitious *** orientation of fibers,in this regard,is one of the major factors influencing the ductile behavior of this *** this study,fiber orientation distributions in ECC beams influenced by different casting techniques are evaluated via numerical modeling of the casting *** casting directions and two casting positions of the funnel outlet with beam specimens are modeled using a particle-based smoothed particle hydrodynamics(SPH)*** this SPH approach,fresh mortar and fiber are discretized by separated mortar and fiber particles,which smoothly interact in the computational domain of *** movement of fiber particles is monitored during the casting ***,the fiber orientations at different sections of specimens are determined after the fresh ECC stops flowing in the *** simulation results show a significant impact of the casting direction on fiber orientation distributions along the longitudinal wall of beams,which eventually influence the flexural strength of *** addition,casting positions show negligible influences on the orientation distribution of fibers in the short ECC beam,except under the pouring position.

关键词： ECC fiber orientation distribution casting direction casting position

Optimization, equilibrium, adsorption behavior and role of surface functional groups on graphene oxide-based nanocomposite towards diclofenac drug

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Journal of Environmental Sciences 2020年第7期32卷 137-150页

作者： thuan Van tran Duyen thi Cam nguyen Hanh tNLe Dai-Viet NVo Sonil Nanda trinh Duy nguyen nguyen tat thanh Hi-tech Institute Nguyen Tat Thanh UniversityHo Chi Minh City 755414Viet Nam Center of Excellence for Green Energy and Environmental Nanomaterials(CE@GrEEN) Nguyen Tat Thanh UniversityHo Chi Minh City 755414Viet Nam Institute of Hygiene and Public Health Ho Chi Minh City 700000Viet Nam Department of Chemical and Biochemical Engineering University of Western OntarioLondonOntarioCanada

Aquatic contamination of diclofenac(DCF),an emergent non-steroidal anti-inflammatory drug(NSAIDs),can result in adverse effects to many ecosystems through ***,introducing effective remediation techniques to sequester the pharmaceutical wastes is highly fundamental to prevent their accumulation in the ***,adsorption has been presented as a green and efficient ***,we report the characterization and application of the novel magnetic nanocomposite(GO@CoFe2O4)derived from cobalt-based ferrite(CoFe2O4)and graphene oxide(GO)for DCF *** the optimization procedure,the response surface methodology(RSM)was adopted to investigate the impacts of DCF concentration(1.6-18.4 mg/L),DCF dosage(0.08-0.92 g/L),and solution pH(2.6-9.4)to find the optimum conditions for DCF removal,at 10.5 mg/L,0.74 g/L,and pH 4,*** the adsorption experiments,the kinetic,isotherm,thermodynamic,and intraparticle diffusion models were systematically ***,we have elucidated the role of functional groups on the surface of GO@CoFe2O4 in enhancing the adsorption of DCF *** good removal efficiency(up to 86.1%),high maximum adsorption capacity(32.4 mg/g),GO@CoFe2O4 can be a potential candidate to eliminate DCF drug from water.

关键词： Diclofenac sodium Graphene oxide Magnetic nanocomposite Response surface methodology Pharmaceuticals adsorption

tHE SMALL FLOOD OF 1997 AND tHE DRAINAGE OF FLOOD WAtER PROBLEM FROM tHE HAU RIVER tO tHE tHAILAND GULF USING tHE LONG XUYEN QUADRILAtERAL

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THE SMALL FLOOD OF 1997 AND THE DRAINAGE OF FLOOD WATER PROB...

Examining unobserved factors associated with red light running in Vietnam:A latent class model analysis

International Symposium towards Cooperative Utilization and Co-ordinated Management of International Rivers(ISCUCM’99)

作者： nguyen quang Cau Le Huy Ba

＜正＞ Compared with 20 years ago, the Long Xuyen Quadrilateral （L. X. Q） has changed a lot. the surrounding roads of the Long Xuyen Quadrilateral and others inside were raised continuously. the canal systems have been enlarged and dredged to be larger and deeper. these changes led to a change in flood wave various principals in the Long Xuyen Quadrilateral. Based on the measured data and other resources from results of the VRSAP model for

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transportation Safety and Environment 2022年第1期4卷 110-122页

作者： tien Dung Chu tomio Miwa tuan Anh Bui quang Phuc nguyen quang Huy Vu Department of Highway and traffic Engineering University of Transport and CommunicationsNo.3 Cau Giay StreetLang Thuong WardDong Da DistrictHanoi 10001Vietnam Institute of Materials and Systems for Sustainability Nagoya UniversityFuro-choChikusa-kuNagoya cityAichi Prefecture464-8603Japan

Red-light running(RLR)is a crucial violation that causes traffic accidents and *** factors that affect RLR is very significant to reduce the potential of this *** studies have paid considerable attention to the observable factors,but not to unobservable *** study aims to examine the effects of observable and unobservable factors on *** study uses a latent class model(LCM)to assign individuals into two classes—red-light-respectful and red-light-disrespectful road users—by surveying 751 respondents who use private transportation *** study incorporates psychological determinants into the LCM to account for unobservable *** contribution of this study is the in-depth investigation into law-respectful and law-disrespectful behaviours and intentional and unintentional *** a study has not yet been conducted in the existing *** addition,a comprehensive comparison of the LCM and a traditional ordered probit model was ***,the results suggest that the LCM is superior to the model that does not consider latent *** estimation results are in alignment with previous studies on RLR:males,younger drivers/riders,less educated road users and motorcyclists are more likely to run red *** analysis of the latent variables shows that surrounding conditions—the behaviour of other violators,the absence of traffic police,and long waiting times—increase the possibility of *** on these results,we provide suggestions to policymakers and traffic engineers:the implementation of enforcement cameras and penalties for violators are critical countermeasures to minimize the potential of RLR.

关键词： red light running(RLR) developing country latent class model(LCM) multiple indicator multiple cause(MIMIC)model latent variables(LVs) motorcycles(MCs) traffic violation

A review on the erosion mechanisms in abrasive waterjet micromachining of brittle materials

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International Journal of Extreme Manufacturing 2019年第1期1卷 111-124页

作者： t nguyen J Wang School of Mechanical and Manufacturing Engineering UNSW SydneyNSW 2052Australia

the fabrication of miniature structures on components with high-integrity surface quality represents one of the cutting edge technologies in the 21st *** materials used to construct such small structures are often *** other readily available technologies either cannot realise necessary precision or are *** waterjet(AWJ)is a favourable technology for the machining of difficult-to-machine ***,this technology is generally aimed at large stock removal.A reduction in the scale of this technology is an attractive avenue for meeting the pressing need of industry in the production of damage-free micro *** paper reviews some of the work that has been undertaken at UNSW Sydney about the development of such an AWJ technology,focusing on the system design currently employed to generate a micro abrasive jet,the erosion mechanisms associated with processing some typical brittle materials of both single-and *** models based on the findings are also *** review concludes on the viability of the technology and the prevailing trend in its development.

关键词： micro abrasive jet abrasive waterjet ductile erosion viscous flow difficult to machine materials

A Multinational Data Set of Game Players' Behaviors in a Virtual World and Environmental Perceptions

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Data Intelligence 2021年第4期3卷 606-629页

作者： Quan-Hoang Vuong Manh-toan Ho Viet-Phuong La tam-tri Le thanh Huyen t.nguyen Minh-Hoang nguyen Centre for Interdisciplinary Social Research Phenikaa UniversityYen Nghia WardHa Dong DistrictHanoi 100803Vietnam A.I.for Social Data Lab Vuong&AssociatesDong Da DistrictHanoi 100000Vietnam

Video gaming has been rising rapidly to become one of the primary entertainment media,especially during the COVID-19 *** video games has been reported to associate with many psychological and behavioral ***,little is known about the connections between game players’behaviors in the virtual environment and environmental ***,the current data set offers valuable resources regarding environmental worldviews and behaviors in the virtual world of 640 Animal Crossing:New Horizons(ACNH)game players from 29 countries around the *** data set consists of six major categories:1)socio-demographic profile,2)COVID-19 concern,3)environmental perception,4)gameplaying habit,5)in-game behavior,and 6)game-playing *** making this data set open,we aim to provide policymakers,game producers,and researchers with valuable resources for understanding the interactions between behaviors in the virtual world and environmental perceptions,which could help produce video games in compliance with the United Nations(UN)Sustainable Development Goals.

关键词： Environmental psychology Virtual environment Game-playing behaviors Multinational UN compliance design