Fault tolerance is one of the most interesting features in stand-alone electric propulsion systems. Multiphase induction motor drives are presented like a better alternative to their three-phase counterparts because capability withstand faulty situations, ensuring postfault operation drive. Finite-control set model-based predictive control (FCS-MPC) has been introduced last decade an conventional controllers for electrical torque and current regulation multiphase drives. However, FCS-MPC...

Purpose This paper aims to explore the image of travel destinations after visit by analysing sentiment orientation online reviews, and how this orientation, as well other electronic word mouth (eWOM)’s credibility sources, can affect perceived helpfulness shared opinions measured through score. Design/methodology/approach Tourist are increasingly affected travel-related information Web. More more people first check previous experiences build their own destination help them in choice...

<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> Multiphase (more than three phases) drives possess interesting advantages over conventional three-phase drives. Over the last years, various topics related to extension of classical control schemes these specifics have been covered in depth literature, such as vector a six-phase induction machine with two sets stator windings spatially shifted by 30 electrical degrees (also called asymmetrical...

Abstract The application of scientific tools to analyse the use Internet-based e-learning in academic settings is general an ignored area. E-learning are actually emergent topic as a result new ideas introduced by European Higher Education Area. Lifelong learning, or promotion student initiative, paradigm learner-centred education. In this context, can represent effective way supporting trend Assuming premise that successful these web-based depends primarily on user's behaviour, objective...

Multiphase electric drives have been recently proposed for applications where the highest overall system reliability and a reduction in total power per phase are required. Strategies derived from conventional field-oriented control traditionally used high-performance speed-control of multiphase drives. The well-known direct torque (DTC) technique has also applied case, but achieved performance with hysteresis-control-based approach is far that obtainable three-phase drive, although structure...

Predictive control techniques have recently been applied with success to conventional and multiphase electrical drives. The additional degrees of freedom in drives make the real-time implementation optimal solutions difficult due increased number iterations. This paper proposes a predictive technique that reduces available voltage source inverter switching states according predefined constraints. introduced method, called as restrained search control, favors on-line improves current tracking...

The interest in predictive control approach and multiphase drives has been steadily growing during the last decade. Predictive techniques have recently introduced as a viable alternative to conventional PI controllers with carrier-based or space vector PWM current regulation of power converters drives. developed schemes demonstrated good performance at expense high computational cost, an unknown switching frequency, appearance large undesirable stator harmonic components. In this paper,...

<para xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"> Multiphase (more than three phases) drives exhibit interesting advantages over conventional three-phase drives. Over the last years, topics related to extension of control schemes these specific have been covered in depth literature. Direct torque and predictive current are normally used ac when fast electrical dynamic performance is required. In this paper, a one-step modulation technique...

Disastrous events are one of the most challenging applications multihop ad hoc networks due to possible damages existing telecommunication infrastructure. The deployed cellular communication infrastructure might be partially or completely destroyed after a natural disaster. Multihop is an interesting alternative deal with lack communications in disaster scenarios. They have evolved since their origin, leading different paradigms such as MANETs, VANETs, DTNs, WSNs. This paper presents survey...

Online reviews have become increasingly important in tourist destinations and they affect the way which are perceived by potential consumers. They represent an overabundant source of information form open answers, where customers freely express their experience regarding destination. Previous studies made use shared experiences visitors to obtain main attributes a This article goes one step further proposes identification those that uniquely associated with destination when compared some...

This paper reports on flux harmonic distortion factor and current ripple analysis for various discontinuous pulse-width-modulation (PWM) techniques, which are applicable in conjunction with five-phase two-level inverter-fed induction motors. The is based the application of complex space vector approach. results compared throughout corresponding continuous PWM techniques. Different carrier-based methods encompassed by analysis. supported extensive simulation results. Verification theoretical...

The interest in multiphase drives has re-emerged the last decade, being asymmetrical dual three-phase induction motor drive one of most popular options. Predictive control techniques, already implemented drives, have been recently adapted to case. Schemes proposed so far demonstrated high performance at expenses a higher degree computational cost and ill-defined switching frequency. In this study, predictive space vector PWM (SVPWM) current technique with fixed frequency is for AC drives....

Purpose A large variety of online communities have emerged during the last years as a result challenges faced by both business and scientific worlds. This trend has also been promoted development internet new Web 2.0 technologies. In this context, paper is focused on determinants success communities. But, difference from other studies, these are analyzed social network analysis perspective. Several constructs related to community organization proposed their interrelations hypothesized in...

This paper proposes a new background subtraction algorithm based on the sigma-delta filter, which is intended to be used in urban traffic scenes. The original very interesting alternative due its high computational efficiency. However, model quickly degrades complex scenes because it easily "contaminated" by slow-moving or temporarily stopped vehicles. Then, subsequent foreground validation steps are needed refine detection mask. Instead of requiring any processing resorting algorithms with...

Autonomous surfaces vehicles (ASVs) excel at monitoring and measuring aquatic nutrients due to their autonomy, mobility, relatively low cost. When planning paths for such vehicles, the task of patrolling with multiple agents is usually addressed heuristics approaches, as Reinforcement Learning (RL), because complexity high dimensionality problem. Not only do efficient have be designed, but addressing disturbances in movement or battery's performance mandatory. For this multiagent task,...