Chittagong University of Engineering & Technology

About: Chittagong University of Engineering & Technology is a education organization based out in Chittagong, Bangladesh. It is known for research contribution in the topics: Renewable energy & Dielectric. The organization has 1200 authors who have published 1444 publications receiving 10418 citations. The organization is also known as: Engineering College, Chittagong & Bangladesh Institute of Technology, Chittagong.

Transient Effect of a Plug-in Electric Vehicle in a Small-scale Microgrid

Abstract: The plug-in electric vehicle (PEV), is expanding throughout the world for the silenced operation and minimum environmental footprint. This paper presents a simulation model of a small-scale microgrid, including PEV and renewable energy sources to study the transient effect of PEV. A microgrid of three bus systems for 100 PEVs was tested. It was found that grid integration of PEV, improves the system's performance by reducing the peak rotor speed and decreasing settling time (T s ). The percentage overshoot (%OS) variation, T s of different parameters like current, real & reactive power of source as well as load have also enhanced. As a simulation environment, MATLAB/SIMULINK software has been used.

Development of a Technical Device Named GPS Based Walking Stick for the Blind

Abstract: Generally, blind people use a traditional cane (known as white cane) for moving from one place to another. Although, white cane is the international symbol of blindness, it could not help them to detect place and to avoid obstacles. In this paper, we represent a model of walking stick for blind people. It consists of GPS module, GPS Antenna, Arduino, ultrasonic sensor and buzzer. This stick can detect place and obstacles. Position detection part is done with GPS module and GPS antenna. Ultrasonic sensor is used for detecting obstacles. Here, the buzzer produces two types of sound. When the blind reaches to his destination, buzzer buzzes continuously. When the blind faces any obstacles, buzzer buzzes with interruption. By discovering these two types of sound, blind can be confirmed about his destination and also can avoid obstacles in front of him. The whole system is designed to be small, light and is used in conjunction with the white cane so that it could ensure safety of the blind.

ICFVR 2017: 3rd International Competition on Finger Vein Recognition

Abstract: In recent years, finger vein recognition has become an important sub-field in biometrics and been applied to real-world applications. The development of finger vein recognition algorithms heavily depends on large-scale real-world data sets. In order to motivate research on finger vein recognition, we released the largest finger vein data set up to now and hold finger vein recognition competitions based on our data set every year. In 2017, International Competition on Finger Vein Recognition(ICFVR) is held jointly with IJCB 2017. 11 teams registered and 10 of them joined the final evaluation. The winner of this year dramatically improved the EER from 2.64% to 0.483% compared to the winner of last year. In this paper, we introduce the process and results of ICFVR 2017 and give insights on development of state-of-art finger vein recognition algorithms.

Dynamic response of electrical, dielectric and magnetic properties of La-substituted Ni-Cu-Cd bulk ceramics with structural rietveld refinement

Abstract: Bulk dense ceramics are needed in many electronic applications instead of powder with grain in the nanometric range that is the prime objectives of the present research. In this paper, Ni0.5Cu0.2Cd0.3Fe2−xLaxO4 ceramics were prepared sintered at 900 °C from Sol–gel synthesized nanocrystalline ferrites. Sintering of nanocrystalline powders has been done to obtain dense ceramics which in turn affects the structural, electrical, dielectric and magnetic properties of these materials. Structural characterizations were performed by the X-ray diffraction (XRD) technique. XRD data were analyzed by the Rietveld Refinement method with the Fullprof suite programme. By the implementation of data, structures have been analyzed and it is observed goodness of fitting as well as different parameters which include crystallite size, cation distribution, crystal structure using Vesta, electron density and Maximum Entropy Map has been obtained for each of every set. Furthermore, densification, dielectric properties, initial permeability, ac conductivity, etc. have been done with La3+ substitution. The influence of La3+ substitution on the magnetic permeability curve of the sample was studied at room temperature. With the arisen frequency the real part of permeability remains almost constant and shows a better relative quality factor. Enhancement of initial permeability of dense ceramics was observed with the substitution of La3+. It is depicted that the dielectric loss tangent reduces remarkably with increasing La3+ content.