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: Computer science & Renewable energy. 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.

A survey of mobility management in wireless mesh networks

Abstract: Wireless mesh networking (WMN) has received unprecedented attention from the research community due to its cost effectiveness for providing high bandwidth internet access. For realizing large scale wireless mesh network with seamless communication, mobility management is a vital issue. Although remarkable contribution has been made on mobility management in WMNs, it needs more attention for improvement of real time communication. In this article, an investigation on IP-based mobility management schemes in WMNs is conducted. By analyzing the existing and current research works on mobility management in WMNs, this paper proposes the open challenges at the end.

Effect of annealing temperature on the structural, dielectric and electric properties of $$\hbox {Ni}_{{0.7}} \hbox {Cd}_{0.3}\hbox {Fe}_{2}\hbox {O}_{4}$$ Ni 0.7 Cd 0.3 Fe 2 O 4 ferrites

Abstract: A composition of Ni $$_{{07}}\hbox {Cd}_{{03}}\hbox {Fe}_{{2}}\hbox {O}_{{4}}$$ (NCF) ferrite nanoparticles was synthesized by a sol–gel auto-combustion technique The particles in powder form were annealed at 550 and 700 $$^{\circ }\hbox {C}$$ to study the structural, dielectric and electric properties of NCF by using X-ray diffraction (XRD), field emission scanning electron microscopy, impedance and modulus spectroscopy XRD patterns confirmed the single phase cubic spinel structure of the sample The average crystallite size of NCF was found to be 17 nm at 550 $$^{\circ }\hbox {C}$$ and 31 nm at 700 $$^{\circ }\hbox {C}$$ , respectively The variation in complex dielectric constant, loss tangent and impedance along with the modulus properties of NCF with frequencies was observed at room temperature because of their size and annealing temperature Notably, dielectric dispersion of the materials was observed at low frequencies because of Maxwell–Wagner interfacial polarization The impedance and modulus spectroscopy were used to investigate the electric properties of the materials, which revealed the increase in grain and grain boundary resistance with annealing temperature A non-Debye type of relaxation in the materials was evidenced through the Cole–Cole study of impedance and modulus spectra

Hybrid neural network for efficient training

Abstract: Neural Network is a platform to implement artificial intelligence and universally used neural network is Backpropagation (BP). Local minimum, slower convergence, premature saturation, training pattern overspecialization limits the performance of Backpropagation algorithm. To withstand those problems several modified algorithms was proposed. A faster superintendent algorithm named Hybrid Backpropagation algorithm (HBP) is used in this paper because of training of the neural network is found from Back-propagation with Chaotic Learning (BPCL) with different types of chaos, Maximization of gradient function (BPfast) and Error back-propagation (EBP) to mitigate the limitations of BP. HBP is examined on several benchmark categorize problems like glass, breast cancer, diabetes, horse and Australian credit card. For the ability of generalization and fast rate of convergence than any single algorithm HBP outperforms BP, BPfast, BPCL and EBP.

Cost-effective Seawater Purification System Using Solar Photovoltaic

Abstract: The world is improving day by day. But besides this improvement, pure drinking water and fossil energy reduce at a significant rate. Access to basic drinking water and energy is a daily struggle for billions of people around the world. Bangladesh is one of these counties where power and accessible pure water are one of the prime concerns which rising worse in recent days mostly in the rural and coastal regions. Salinity at the coastal areas increases at an alarming rate due to climate change. Desalination facilities are consuming a large amount of energy from conventional power sources and its very expensive. To bring the cost down at an economically sustainable level, renewable energy can be considered which is the best way for alternative power sources for freshwater production. In this paper, Chittagong is chosen for the water purification system. Because this region has the highest lack of access to fresh drinking water and vulnerable to climate change. The average total dissolved solids (TDS) of water are range from 3000 to 7000 mg/L in this region which is much higher from the WHO (World Health Organization) standard of fresh drinkable water (TDS < 1000 mg/L). This research primarily focuses on supplying drinking water according to the WHO standard and also providing basic energy by a standalone solar system. This system is simulated using HOMER and WinFlows software and found that the cost of purification water reduces to .00191 per liter.

Comparison Between TCSC, SVC and TCSC, STATCOM Based Compensation on East-West Interconnectors of Bangladesh Power System

Abstract: In this paper a comparative study has been performed between combined Thyristor controlled series capacitor (TCSC), Static VAR compensator (SVC) and combined TCSC, Static synchronous compensator (STATCOM) to enhance the steady state, dynamic state and transient state stability of East-West interconnected system (EWIS) of Bangladesh Power System (BPS). Two TCSCs are connected in series with both interconnectors and two SVCs and STATCOMs are connected alternatively in shunt mode at the receiving end of both interconnectors. Steady state, Modal and Transient stability analyses are performed to show the improving effect of series shunt combined compensation on stability and capacity enhancement of EWIS. In case of shunt compensation superiority of STATCOM is also shown in comparison to SVC. In both the cases of comparison series compensation level is kept identical for fair comparison.