Vol. 1 No. 02 (2023): TẠP CHÍ ĐIỆN TỬ KHOA HỌC VÀ CÔNG NGHỆ QUI

View Vol. 1 No. 02 (2023): TẠP CHÍ ĐIỆN TỬ KHOA HỌC VÀ CÔNG NGHỆ QUI

Published: 2023-06-29

SCIENCE OF EARTH AND MINES

Research the effect of mining depth on deformation and collapse process of the roof by FLAC 3D software

Vu Duc Quyet, Vu Ngoc Thuan, Vu Thi Ngoc

6
The ultrasonic pulse velocity (UPV) experimental method applied to investigate the changes in pulse velocity in concrete using artificial sand

Pham Thi Nhan, Vu Duc Quyet

12

ELECTRONICS-AUTOMATION

Building a 6-phase PWM control model on Matlab/Simulink

Nguyen Thu Huong, Tran Thanh Tuyen, Luu Binh

27
Simulition of a non-linear, time-variant circuit using the Haar wavelet transform

Tran Thi Thom

34
Research to improve 5,5kw 4-pole asynchronous motor performance based on the winding type by ANSYS MAXWELL software

Nguyen Thi Thuong Duyen, Tran Thanh Tuyen, Tran Van Thuong, Doan Thi Bich Thuy

45
Building a system to measure and monitor temperature and toxic gas concentration and automatically improve the condition of the working environment

Doan Huu Chuc

54
Study on the possibility of converting the YBT-52-2 local fan motor into a direct-start permanent magnet synchronous motor

Tran Huu Phuc, Tran Thanh Tuyen, Tran Huu Phan

63

ENERGY SAVING-MECHANICAL

Study phenomena slag of boiler at the theroelectric boilers old and solutions

Vi Thi Nhung, Vu Dinh Hai

70

ECONOMICS

Protecting consumers from risks of online shopping in Viet Nam

Lanh Thi Hoa, Le Xuan Huong, Nguyen Thi Thuong Huyen

20

EDUCATION MANAGEMENT

Solutions to enhance the quality of teaching intermediate Vietnamese for Lao students at Quang Ninh University of Industry

Vu Thi Thanh Huyen, Cao Hai An, Ngo Hai Yen

82

POLITICAL AND SOCIAL SCIENCE

Building a model of a gentleman in today's time

Hoang Van Hung, Gao Shan Zuo

90