Tạp chí Kỹ thuật và Công nghệ Đại học Quốc gia Thành phố Hồ Chí Minh
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Việt Nam
Cơ quản chủ quản: Đại học Quốc gia Thành phố Hồ Chí Minh
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Các bài báo tiêu biểu
A new design of the Lobe pump is based on the meshing principle of elliptical gear pairs
Tập 4 Số 2 - Trang 861-871 - 2021
The paper presents a new rotor design of an external coupling Lobe pump driven
by pair of elliptical gears. The new rotor is a four-tooth elliptical gear with
tooth profile is a improve cylocid curve. The improve cylocid curve is the locus
of the fixed point on the generation circle, when the circle a pure rolling
without slipping on the elliptical centrode of the rotor. The conditions of the
roto...
Research and manufacture of external non-circular gear-pair with improved cycloid profile of the ellipse
Tập 4 Số 2 - Trang 835-845 - 2021
Non-circular gears (NCGs) are known as an alternative to conventional mechanical
mechanisms in continuous speed converters. In which, the gear profile is the
factor that directly affects the performance and quality meshing of the
non-circular gear. However, the types of curves that are being used to
generating profiles of the non-circular gears still exist limited in meeting the
conditions of unde...
#non-circular gear #shaper cutter #tooth profile #improved cycloid curve.
Application of response surface methodology for evaluating material removal in rate die-sinking EDM roughing using copper electrode
Tập 1 Số 1 - Trang 20-27 - 2019
Die-sinking electrical discharge machining (EDM) is one of the most popular
machining methods to manufacture dies and press tools because of its capability
to produce complicated shapes and machine very hard materials. In this article,
MRR study on die-sinking EDM in rough machinng of SKD11 die steel has been
carried out. Response surface methodology (RSM) has been used to plan and
analyze the exp...
LLC Inverter Design Procedure for Induction Heating with Quantitative Analysis of Power Transfer
Tập 4 Số 1 - Trang 739-747 - 2021
The paper explains the operating principle of an LLC resonant circuit for
induction heating applications. Although induction heating has attracted a great
deal of attention in recent years, very little consideration on designing the
inductor in the resonant circuit for specific requirements has been done.
Specifically, a design procedure with the required power and work-head dimension
as inputs is...
#Resonant inverters #Inductive power transmission #Zero voltage switching
Long Short-Term Memory Based Movie Recommendation
Tập 3 Số SI1 - Trang SI1-SI9 - 2020
Recommender systems (RS) have become a fundamental tool for helping users make
decisions around millions of different choices nowadays – the era of Big Data.
It brings a huge benefit for many business models around the world due to their
effectiveness on the target customers. A lot of recommendation models and
techniques have been proposed and many accomplished incredible outcomes.
Collaborative f...
#Deep learning #Long Short-Term Memory #Recommender systems #Sequence mining
A Compact EES Program to Predict Axial Temperature Distribution in Triple-fluid Heat Exchanger
Tập 3 Số 3 - Trang 452-460 - 2020
In this paper, a simplified mathematical model is presented to predict the axial
temperature distribution of fluids in a three-concentric tube heat exchanger.
Calculation results are compared with experimental results to confirm accuracy.
The objective of the study is to avoid temperature cross which is very likely to
be occurred in triple-fluid heat exchangers. Thereby the designer can adjust the...
Applying statistical analysis for assessing the reliability of input data to improve the quality of short-term load forecasting for a Ho Chi Minh City distribution network
Tập 2 Số 4 - Trang 223-239 - 2020
Short-term load forecasting has an extremely important role in the design,
operation and planning of power system, especially on a power grid of Ho Chi
Minh City (HCMC) - an active city has the highest power demand in Vietnam.
Through the data survey, the load power in the HCMC area changes suddenly so
that it causes disturbances in the load data. Accordingly, the reliability
assessment of the loa...
Path tracking control for car-like robots by pid controller with time-varying parameters
Tập 5 Số 3 - Trang 1642-1650 - 2022
Wheel mobile robots have been widely applied to many areas of life, from serving
people in services and industrial logistics to military fields. Applications of
wheeled mobile robots such as floor cleaning robots, supermarket robots,
logistics robots in hospitals, autonomous robots that guide automatic guidance
in intelligent factories, military robots and agricultural robots. Thereby, we
can see ...
#Car-like robot #Path tracking #PID control #NURBS curve.
CFD simulation for the Wageningen B-Series propeller characteristics in open-water condition using k-epsilon turbulence model
Tập 1 Số 1 - Trang 35-42 - 2019
In the maritime industry, propellers are propulsive devices and play an
important role in the performance of a ship. The hydrodynamic attributes of a
propeller are described in terms of some dimensionless coefficients, such as
thrust coefficient (KT), torque coefficient (KQ), and efficiency (η). However,
it is arduous and usually expensive to determine the characteristics of a
full-size propeller ...
PPG Signal and application in the medical field
Tập 6 Số 1 - Trang 1826-1843 - 2023
The ascent of remote health examination is a burgeoning trend in healthcare,
aimed at tackling the challenge of hospital overload and streamlining the
process of patient monitoring. To achieve these laudable goals, a device that is
both efficient and capable of extracting critical health indicators is of
paramount importance. Enter photoplethysmography (PPG) technology - a compact
and user-friendl...
#PPG #photo-plethysmography # #photo-plethysmography applications #photo-plethysmography principle