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Browsing by Author Nguyen, Thi Thanh Van

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Showing results 1 to 8 of 8
  • 63.pdf.jpg
  • Article

  • Crystallographic Structural and Magnetic Properties of FePt Nanoparticles

    • Authors: Nguyen, Thi Thanh Van; Trương, Thanh Trung; Nguyen, Hoang Nam; Nguyen, Hoang Luong (2014)

  • Fe60Pt40 nanoparticles have been successfully prepared by sonochemistry method from the solution of Fe(C2H3O2)2 and H2PtCl6. The as-prepared sample then has been annealed at temperatures from 450oC to 650oC. Annealed samples have ordered L1o phase with face-centered tetragonal (fct) structure and show hard magnetic properties. The nanoparticles annealed at 550oC show highest coervicity of 4.36 kOe measured at room temperature. The annealed-temperature dependence of the coercivity is consistent with the appearance of the order phase L1o in the samples.
  • 27.pdf.jpg
  • Article

  • Effect of Heat Treatment Conditions on the Properties of FePt Nanoparticles Produced by Sonochemistry

    • Authors: Truong, Thanh Trung; Nguyen, Thi Thanh Van; Nguyen, Hoang Nam; Nguyen, Hoang Luong (2015)

  • Magnetic properties of magnetic nanoparticles FePt prepared by sonochemistry were investigated. Upon annealing at temperature from 450ºC to 650ºC samples have ordered L10 structure and show hard magnetic properties. Influence of heat treatment conditions (annealing temperature, cooling rate) on the magnetic properties of the annealed samples has been studied.
  • item.jpg
  • Conference Paper

  • Employing Extended Kalman Filter with Indoor Positioning System for Robot Localization Application

    • Authors: Tran, Huu Quoc Dong; Phan, Hoang Anh; Nguyen, Dinh Tuan; Bui, Duy Nam; Nguyen, Thi Thanh Van; Bui, Thanh Tung; Chu, Duc Trinh (2019)

  • IPS (Indoor Positioning System) is used to localize the robot position in a narrow environment. However, IPS signal is not accurate in some cases, the IPS signal transmission will be obstructed by people the public museums, for example. The combination with other sensors will reduce the poor signal from IPS and noise in the environment with many obstacles. The Extended Kalman Filter (EKF) have been widely used for mobile robot localization system and gained certain results. In this paper, EKF is embedded to Central Processing Unit with Robot Operating System on “UET-FuSo” robot to fuse IPS signal with encoder and IMU sensor for the determination of position and orientation robot. The ...
  • ESPMethodologyForFourth_YearStudents_NTTV.pdf.jpg
  • Book

  • ESP Methodology : for fourth-year students (For internal use only)

    • Authors: - (2019)

  • Table of contents: Definitions, characteristics and principles of ESP; ESP VS general English; ESP teaching and learning; Principles of communicative methodology in teaching ESP; ESP course and syllabus design; Material selection, material adaptation and material evaluation; ESP and language skills; Testing and evaluation in ESP
  • 58.pdf.jpg
  • Article

  • Magnetic memory effect in FePd nanoparticles prepared by sonoelectrochemistry

    • Authors: Nguyen, Thi Thanh Van; Truong, Thanh Trung; Nguyen, Dang Phu; Nguyen, Hoang Nam; Nguyen, Hoang Hai (2012)

  • Magnetic memory effect was newly observed in hard magnetic FePd nanoparticles prepared by sonoelectrochemistry. The applied magnetic field was changed in defined protocols during the magnetic relaxation process and the magnetic memory effect occurs when the field changes are larger than the critical field change of around 25 Oe. This magnetic memory effect can be explained by the magnetic reversal processes in strong interaction systems. The width of the energy barrier distribution of these hard magnetic particles is related to the critical field change deduced from this study.
  • Magnetic-properties-of-CoxPt100-x-nanoparticles_2016_Journal-of-Science-Advanced-Materials-and-Devices.pdf.jpg
  • Article

  • Magnetic properties of CoxPt100 - x nanoparticles

    • Authors: Truong, Thanh Trung; Do, Thi Nhung; Nguyen, Thi Thanh Van; Nguyen, Hoang Nam; Nguyen, Hoang Luong (2016)

  • CoxPt100- x nanoparticles (x=50, 59, and 73) were prepared by the chemical reduction of Cobalt (II) chloride and Chloroplatinic acid, then ultrasonicated for 2 h. After annealing at various temperatures from 450 C to 700 C for 1 h, structure change was observed and samples show hard magnetic prop-erties which depend strongly on chemical composition and annealing temperature. The highest coer-civity value of 1.15 kOe was obtained at room temperature for sample with x =50 annealed at 500 C. Chemical reduction combined with ultrasound is a useful method to prepare CoPt nanoparticles
  • TL10.pdf.jpg
  • Article

  • A Novel Behavior-based Navigation Architecture of Mobile Robot in Unknown Environments

    • Authors: Nguyen, Thi Thanh Van; Phung, Manh Duong; Dang, Anh Viet; Tran, Quang Vinh (2016)

  • This study proposes behavior-based navigation architecture, named BBFM, for mobile robot in unknown environment with obstacles. The architecture is carried out in three steps: (i) analyzing the navigation problem to determine parameters of the architecture; (ii) designing the objective functions to relate input data with the desired output; and (iii) fusing the output of each objective function to generate the optimal control signal. We use fuzzy logic to design the objective functions and multi-objective optimization to find the Pareto optimal solution for the fusion. A number of simulations, comparisons, and experiments were conducted. The results show that the proposed architecture...
  • 63.pdf.jpg
  • Article

  • Temperature dependence of hard magnetic properties of FePd nanoparticles prepared by sonoelectrochemistry

    • Authors: Nguyen, Thi Thanh Van; Truong, Thanh Trung; Nguyen, Hoang Nam; Nguyen, Hoang Luong (2012)

  • Hard magnetic properties of magnetic nanoparticles FePd were investigated in dependence of temperature. Magnetic nanoparticles FePd were prepared from palladium acetate and iron acetate by sonoelectrochemistry, an useful technique to make metallic nanoparticles using ultrasound. Upon the annealing at 450°C to 650°C samples have ordered L10 structure and show hard magnetic properties with high coercivity up to 2.1 kOe at room temperature and increases to 2.43 kOe with decreasing temperature down to 2 K.

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Browsing by Author Nguyen, Thi Thanh Van

Jump to: 0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
or enter first few letters:  
Showing results 1 to 8 of 8
  • 63.pdf.jpg
  • Article

  • Crystallographic Structural and Magnetic Properties of FePt Nanoparticles

    • Authors: Nguyen, Thi Thanh Van; Trương, Thanh Trung; Nguyen, Hoang Nam; Nguyen, Hoang Luong (2014)

  • Fe60Pt40 nanoparticles have been successfully prepared by sonochemistry method from the solution of Fe(C2H3O2)2 and H2PtCl6. The as-prepared sample then has been annealed at temperatures from 450oC to 650oC. Annealed samples have ordered L1o phase with face-centered tetragonal (fct) structure and show hard magnetic properties. The nanoparticles annealed at 550oC show highest coervicity of 4.36 kOe measured at room temperature. The annealed-temperature dependence of the coercivity is consistent with the appearance of the order phase L1o in the samples.
  • 27.pdf.jpg
  • Article

  • Effect of Heat Treatment Conditions on the Properties of FePt Nanoparticles Produced by Sonochemistry

    • Authors: Truong, Thanh Trung; Nguyen, Thi Thanh Van; Nguyen, Hoang Nam; Nguyen, Hoang Luong (2015)

  • Magnetic properties of magnetic nanoparticles FePt prepared by sonochemistry were investigated. Upon annealing at temperature from 450ºC to 650ºC samples have ordered L10 structure and show hard magnetic properties. Influence of heat treatment conditions (annealing temperature, cooling rate) on the magnetic properties of the annealed samples has been studied.
  • item.jpg
  • Conference Paper

  • Employing Extended Kalman Filter with Indoor Positioning System for Robot Localization Application

    • Authors: Tran, Huu Quoc Dong; Phan, Hoang Anh; Nguyen, Dinh Tuan; Bui, Duy Nam; Nguyen, Thi Thanh Van; Bui, Thanh Tung; Chu, Duc Trinh (2019)

  • IPS (Indoor Positioning System) is used to localize the robot position in a narrow environment. However, IPS signal is not accurate in some cases, the IPS signal transmission will be obstructed by people the public museums, for example. The combination with other sensors will reduce the poor signal from IPS and noise in the environment with many obstacles. The Extended Kalman Filter (EKF) have been widely used for mobile robot localization system and gained certain results. In this paper, EKF is embedded to Central Processing Unit with Robot Operating System on “UET-FuSo” robot to fuse IPS signal with encoder and IMU sensor for the determination of position and orientation robot. The ...
  • ESPMethodologyForFourth_YearStudents_NTTV.pdf.jpg
  • Book

  • ESP Methodology : for fourth-year students (For internal use only)

    • Authors: - (2019)

  • Table of contents: Definitions, characteristics and principles of ESP; ESP VS general English; ESP teaching and learning; Principles of communicative methodology in teaching ESP; ESP course and syllabus design; Material selection, material adaptation and material evaluation; ESP and language skills; Testing and evaluation in ESP
  • 58.pdf.jpg
  • Article

  • Magnetic memory effect in FePd nanoparticles prepared by sonoelectrochemistry

    • Authors: Nguyen, Thi Thanh Van; Truong, Thanh Trung; Nguyen, Dang Phu; Nguyen, Hoang Nam; Nguyen, Hoang Hai (2012)

  • Magnetic memory effect was newly observed in hard magnetic FePd nanoparticles prepared by sonoelectrochemistry. The applied magnetic field was changed in defined protocols during the magnetic relaxation process and the magnetic memory effect occurs when the field changes are larger than the critical field change of around 25 Oe. This magnetic memory effect can be explained by the magnetic reversal processes in strong interaction systems. The width of the energy barrier distribution of these hard magnetic particles is related to the critical field change deduced from this study.
  • Magnetic-properties-of-CoxPt100-x-nanoparticles_2016_Journal-of-Science-Advanced-Materials-and-Devices.pdf.jpg
  • Article

  • Magnetic properties of CoxPt100 - x nanoparticles

    • Authors: Truong, Thanh Trung; Do, Thi Nhung; Nguyen, Thi Thanh Van; Nguyen, Hoang Nam; Nguyen, Hoang Luong (2016)

  • CoxPt100- x nanoparticles (x=50, 59, and 73) were prepared by the chemical reduction of Cobalt (II) chloride and Chloroplatinic acid, then ultrasonicated for 2 h. After annealing at various temperatures from 450 C to 700 C for 1 h, structure change was observed and samples show hard magnetic prop-erties which depend strongly on chemical composition and annealing temperature. The highest coer-civity value of 1.15 kOe was obtained at room temperature for sample with x =50 annealed at 500 C. Chemical reduction combined with ultrasound is a useful method to prepare CoPt nanoparticles
  • TL10.pdf.jpg
  • Article

  • A Novel Behavior-based Navigation Architecture of Mobile Robot in Unknown Environments

    • Authors: Nguyen, Thi Thanh Van; Phung, Manh Duong; Dang, Anh Viet; Tran, Quang Vinh (2016)

  • This study proposes behavior-based navigation architecture, named BBFM, for mobile robot in unknown environment with obstacles. The architecture is carried out in three steps: (i) analyzing the navigation problem to determine parameters of the architecture; (ii) designing the objective functions to relate input data with the desired output; and (iii) fusing the output of each objective function to generate the optimal control signal. We use fuzzy logic to design the objective functions and multi-objective optimization to find the Pareto optimal solution for the fusion. A number of simulations, comparisons, and experiments were conducted. The results show that the proposed architecture...
  • 63.pdf.jpg
  • Article

  • Temperature dependence of hard magnetic properties of FePd nanoparticles prepared by sonoelectrochemistry

    • Authors: Nguyen, Thi Thanh Van; Truong, Thanh Trung; Nguyen, Hoang Nam; Nguyen, Hoang Luong (2012)

  • Hard magnetic properties of magnetic nanoparticles FePd were investigated in dependence of temperature. Magnetic nanoparticles FePd were prepared from palladium acetate and iron acetate by sonoelectrochemistry, an useful technique to make metallic nanoparticles using ultrasound. Upon the annealing at 450°C to 650°C samples have ordered L10 structure and show hard magnetic properties with high coercivity up to 2.1 kOe at room temperature and increases to 2.43 kOe with decreasing temperature down to 2 K.