Particle swarm optimization

Grey Wolf Optimizer (GWO) is inspired by grey wolves. The leadership hierarchy and hunting mechanism of grey wolves is mimicked by GWO algorithm. GWO employs four types of grey wolves such as alpha, beta, delta, and omega. GWO consists of three main steps of hunting, searching for prey. Encircling prey, and attacking prey [38]. GWO is benchmarked on many challenging test problems and applied to some real engineering problems. The results reveal that GWO is able to provide very competitive…

1.1 General This work deals with the important issue of transmission system congestion management with consideration of voltage stability as a load ability limit. Congestion is defined as a whenever the physical or operational constraints in a transmission network become active, the system is said to be in a state of congestion. The possible limits that may be hit in case of congestion are: line thermal limits, transformer emergency ratings, bus voltage limits, transient or…

The asynchronous algorithm is thus very similar to the synchronous algorithm, except that we update as much information as possible after each design point is analyzed. The inertia is only applied when design iteration is completed. Of course, this could result in some points of the next design iteration being analyzed before the inertia operator is applied for that design iteration. However, the influence on the overall performance of the algorithm seems to be negligible [24]. IV. PROPOSED PSO…

The PVRP develops the classical Vehicle Routing Problem (VRP) to a planning horizon of several days. Each customer requires a certain number of visits within this time horizon while there is some flexibility on the exact days of the visits. The PVRP is a problem which occurs in companies that have to accomplish periodic repair and maintenance activities or that collect/deliver goods periodically. ¬Early formulations of the PVRP were developed by Beltrami and Bodin (1974) [13]. Christofides and…

Abstract— Harmonics that are created by non-linear devices connected to the power system. Power system harmonics are multiples integer of the fundamental power system frequency and these harmonic frequencies can create distorted voltages and currents. Distortion of voltages and currents can impact on the power system adversely causing power quality problems. Therefore, approximation of harmonics is of high importance for efficiency of the power system network to maintain the quality limits…

Abstract— A brain tumor is an abnormal growth of tissue in the brain. It is possible to treat an insecure brain when brain cells divide and grow uncontrollably. Brain cells begin to grow and divide differently from healthy cells, forming a "high grade" (cancerous) or "low grade" (benign) tumor. Brain tumor spread by local extension and rarely by meta size (spread) outside the brain. The extraction of brain tumors and its analysis are demanding. In recent years, segmentation of brain tumors in…

The split criterion and dead criterion are listed below. GIVE FORMULA Nsplit and Nadapt are two new parameters which have their usage in controlling and adjusting the split criterion and dead criterion. S is the initial population size and S^i is the current population size. It should be taken into consideration that the population size will increase by one if a bacterium undergoes reproduction and decrease by one if a bacterium faces lethat consequences. As a result, the population size may…

error of DVL and the low rate measurements of USBL are fused using the proposed filter and a more precise estimate of velocity, position and orientation of this vehicle is produced. The USBL measurements and the DVL measurements are fused using a particle filter to give a geo-referenced position estimate without drifting in [17]. An information filter is used in [18] for USBL and DVL data fusion while dealing with the delays caused by the acoustic communication 3) Long Baseline: Long Baseline…

In this research, we study the bi-objective economic lot scheduling problem (ELSP) considering deteriorating items in which the shortage is allowed. The considered problem is NP-hard since the ELSP is already shown as NP-hard problem. The goal of this study is to minimize two objectives simultaneously; 1) setup and inventory holding costs including deteriorating factor, 2) total number of stock out units of each item during each period. The studied ELSP problem, adopts extended basic period…

X4-AUV using nonlinear control and optimization technique. Firstly, an overview of underwater vehicles and it categorize are explained. Then, details explanation of AUVs and the problems in controlling AUV systems which fall into the underactuated system with nonholonomic constraints are presented. Backstepping is one of nonlinear control methods and previous research work used backstepping control given in this chapter subsection. Lastly, a particle swarm optimization (PSO) in parameter tuning…