Reliable fault diagnosis of the rolling element bearings highly relies on correct extraction fault-related features from vibration signals in time-frequency analysis. However, considering nonlinear, nonstationary characteristics signals, hidden heavy noise has become a challenging task. Variable mode decomposition (VMD) is an adaptive, completely nonrecursive method variation and signal process...

Low frequency oscillation problems are very difficult to solve because power systems are very large, complex and geographically distributed. Therefore, it is necessary to utilize most efficient optimization methods to take full advantages in simplifying the problem and its implementation. From this perspective, many successful and powerful optimization methods and algorithms have been employed ...

Intentional islanding is a feasible solution to improve the reliability of the smart distribution system with distributed generations (DGs) when the electrical connections between the smart distribution system and upstream network are lost. In this paper, a heuristic method is proposed for the intentional islanding of microgrids. In this method, some practical and important factors such as redu...

Glowworm swarm optimization (GSO) algorithm is a new intelligent optimization algorithm. Based on the problems of GSO, such as easy to fall into local optimum, slow convergence speed and low optimization precision, an improved GSO with group division is presented. Using shuffled frog leaping algorithm (SFLA), glowworms are divide into different ethnic groups, and local search and global informa...

This paper presents a Modified Shuffled Frog Leaping Algorithm to obtein the optimal number and location of FACTS devices in a power system. Unified Power Flow Controller (UPFC) has great flexibility that can control the active and reactive power flow and bus voltages, simultaneously. Decoupled model of the UPFC is applied to maximize the system loadability subject to the transmission line capa...

Network security is a large and growing area of concern for every network. Firewalls are used as a security check point in a network environment. In order to further strengthen the network from illegal access, the concept of Intrusion Detection System (IDS) is important. Clustering technique helps to detect the known as well as unknown types of intrusions. In this paper, K-means clustering with...

Due to the influence of indoor space environments, carrier phase information obtained by BeiDou pseudo-satellite often has issue cycle slips, which makes user unable carry out high-precision positioning. Aiming at problem ambiguity resolution (AR) and location in large-scale occluded (LSOS), a factor graph (FG) position method based on group ranging estimation pseudolite is proposed. Firstly, i...

The most important research area in robotics is navigation algorithms. Robot path planning (RPP) the process of choosing best route for a mobile robot to take before it moves. Finding an ideal or nearly referred as “path optimization.” solution values that satisfy single number objectives, such shortest, smoothest, and safest path, goal. objective this study present overview strategies robots u...