ROBUST ADAPTIVE NEURAL TRACKING CONTROL FOR UNDERACTUATED NONLINEAR SYSTEMS: A ROTARY INVERTED PENDULUM CASE STUDY Tập 77 Số 5 - Trang - 2025
Nguyễn Hoàng Hiếu, Mai Thăng Long, Nguyễn Ngọc Sơn
The underactuated system demonstrates significant coupling and highly nonlinear dynamics, posing challenges for precise control. This paper introduces an adaptive control approach for the underactuated rotary inverted pendulum (RIP) system. The objective is to enable the manipulator arm to track a desired trajectory and to maintain the pendulum in an upright position concurrently. The proposed met...... hiện toàn bộ
SILVER NANOWIRE (AGNW) ELECTRODES ON PET SUBSTRATES FOR APPLICATION IN FLEXIBLE ELECTRONIC DEVICES Tập 77 Số 5 - Trang - 2025
Hoàng Thị Thu
Currently, the demand for flexible electronic devices – capable of bending, such as TVs, smartphones, laptops, tablets, and solar cells – is rapidly increasing and has become an inevitable development trend, ushering in a new era in smart materials and device technology. One of the key factors determining the success of flexible optoelectronic devices is the fabrication of transparent conductive e...... hiện toàn bộ
THE ROLE OF SCHOOL CULTURE IN DEVELOPING DIGITAL CULTURE IN CONTEMPORARY VIETNAM
Tập 77 Số 5 - Trang - 2025
Nguyễn Thị Thúy Cường
This article examines the role of school culture in the process of building a digital culture in contemporary Vietnam. Based on a theoretical analysis of both school culture and digital culture, the article argues that school culture is not only an environment for education and character formation but also a foundational platform for fostering digital thinking, critical thinking, and digital ethic...... hiện toàn bộ
FORECASTING NEW ZEALAND HOUSING DEMAND: COMPARING ELASTIC NET, XGBOOST AND RNN MODELS Tập 77 Số 5 - Trang - 2025
Binh Thanh Dang, Chuong Bui Viet
Forecasting housing demand has been a prevalent research focus globally, primarily employing traditional econometric methods. However, the application of machine learning in this domain remains limited, particularly in the New Zealand context. This study addresses this gap by implementing Elastic Net, XGBoost, and Recurrent Neural Network models to predict residential housing demand in New Zealand...... hiện toàn bộ
DESIGN AND DEVELOPMENT OF LOW - SPEED WIND TUNNEL
Tập 77 Số 5 - Trang - 2025
Đặng Tiến Phúc, Bùi Chí Thành, Phạm Việt Phương
The wind tunnel is an important system for testing in the research and development of aeronautical, automotive, and industrial designs that focus on the aerodynamic characteristics of moving objects. This paper presents the design and fabrication of an open-circuit wind tunnel with a test section measuring 500 × 500 mm. Within this section, wind speeds can reach a maximum of 15 m/s, as measured by...... hiện toàn bộ
REAL-TIME SIMULATION FOR ROBUST CONTROL APPLIED TO ASYNCHRONOUS 3-PHASE INDUCTION MOTOR BASED ON THE PPI CONTROL Tập 76 Số 4 - Trang - 2025
Nguyen Vinh Quan, Mai Thang Long
This study proposes the method of real-time simulation for the field-oriented control (FOC) of an asynchronous - phase induction motor (IM) based on the parallel proportional-integral (PPI) technique, to control the motor speed. The proposed control strategy requires two independent direct controllers for flux and current through the 3 level-cascade inverters with the algorithm of carrier phase mo...... hiện toàn bộ
#Rotor-flux-oriented #Stator-flux-oriented #Induction motor #PI control; PPI control
A QUASI-2D MODEL FOR PREDICTING ENTRAINMENT CHARACTERISTICS OF EJECTORS UNDER VARIOUS OPERATING CONDITIONS Tập 77 Số 5 - Trang - 2025
Nguyễn Trung Kiên, Cao Trung Hậu, Nguyễn Hiếu Nghĩa, Kiên Nguyễn
The ejector is a key component in low-grade thermal refrigeration systems thanks to its simple construction and its potential to boost cycle efficiency. This paper presents a quasi-2D mathematical model that accurately predicts entrainment ratio of ejector in both critical and sub-critical regimes. Unlike conventional one-dimensional methods, the quasi-2D approach captures the radial velocity dist...... hiện toàn bộ
TỔNG HỢP VẬT LIỆU QUANG XÚC TÁC TIO2 GẮN TRÊN CHẤT MANG SA/PVP CÓ KHẢ NĂNG THU HỒI ỨNG DỤNG XỬ LÝ KHÁNG SINH TRONG NƯỚC DƯỚI CHIẾU XẠ TIA UV VÀ ÁNH SÁNG MẶT TRỜI
Tập 77 Số 5 - Trang - 2025
Trung Quốc Lai, Thị Tường Vân Trần, Nguyen Chi Hieu
Xu hướng phát triển vật liệu thân thiện với môi trường, có khả năng thu hồi, tái sử dụng và tiến tới loại bỏ hoàn toàn chất thải đang được quan tâm và có tiềm năng ứng dụng. Trong nghiên cứu này, chúng tôi tổng hợp vật liệu quang xúc tác bằng hai phương pháp: (1) trộn sodium alginate với polyvinylpyrrolidone (SP), bột TiO2-P25 trộn chung vào SP và tạo thành hạt hydrogel trong dung dịch CaCl2 (SP1-...... hiện toàn bộ
#antibiotics; sodium alginate; hydrogel bead; photocatalysis; titanium dioxide
THE IMPACT OF GREEN LOGISTICS MANAGEMENT AND INDUSTRY 4.0 ON SUSTAINABLE PERFORMANCE
Tập 77 Số 5 - Trang - 2025
Đào Quốc Đạt, Nguyễn Thị Tú Ngọc, Phạm Thị Đoan Trang, Trần Kim Mẫn, Nguyễn Quốc Cường
In today's digitalization context, especially after the Covid-19 pandemic, environmental factors are increasingly prioritized by businesses. The government is also promoting digital transformation and encouraging the adoption of green logistics in supply chains. However, research on this topic in Vietnam remains limited, mainly focusing on green supply chain management practices and sustainable pe...... hiện toàn bộ