112LUU THI LAN ANH113Quy-Thinh Dao114Cao Son NGUYENSynthesized and characterization of WO3 nanorod hybridization Gr application in environmental treatment(Project 2020)Development of a pneumatic artificial muscle based robotic orthosis for gait rehabilitation(Project 2020)Study on Ability of Basic Oxygen Furnace Slag recycling in Pre-treatment process(Project 2020)73In this work, graphene (Gr) was in-situ hybridized with tungsten oxide nanorod (WO3-NR) by hydrothermal method. The X-ray diffraction results indicated that the in-situ Gr@WO3-NR hybrid materials were successfully synthesized with the Graphene weight percent of 0.1, 0.3, and 0.5 in comparison with WO3 in the nanocomposite. When the weight percent of Gr is higher than 1%, Gr inhibits the formation of the nanorod. The hybrid materials had optical band-gaps in the visible region which show applicability in a photo-catalyst. The binding and formation of hybrid materials were characterized by X-Ray diffraction analysis and Raman spectroscopy. We used field emission scanning electron microscopy to investigate the morphology of materials. The optical properties of materials were characterized by reflectance spectroscopy.Recently, assistive robots are attracted the great attention of researchers in the rehabilitation field. These types of robots support patients to perform designated movements during the training process. The improvement in both hardware and control design perspective is an unavoidable demand despite the existence of commercial rehabilitation systems. This research introduces a prototype pneumatic artificial muscle-based assistive robot named BK-Gait and employs a control strategy for trajectory tracking purposes. First, a brief description of the mechanism of the robotic is introduced. Second, the mathematical model of the robot’s actuator is built. Third, an active disturbance rejection control (ADRC) strategy is developed to improve the tracking performance of the robot. Finally, multi scenarios experiment is carried out to evaluate the applicability of the robot and controller in the rehabilitation field.Recycling of the slag is a crucial challenge for the steel-producing companies because of a huge amount of the slag produced in the steel companies. This paper investigated an ability of a basic oxygen furnace slag us-ing in desulfurization of hot metal in pre-treatment process, as a solution in recycling of the slag. Iron and the slag were obtained from a steel company. The iron was completely melt in a high frequency induction furnace to get hot metal, then a flux containing the slag and CaO was embedded into the metal. After 10 minutes of reaction time, the metal and slag samples were taken out for chemical compositions analysis. The results were shown that the S content of the metal decreased from 0.054 to 0.027 mass%. The oxidation of Silicon (Si) strongly influenced the desulfurization of the metal; increase in oxidation of Si caused removing of Sulfur (S) content of the metal to decrease significantly.
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