Comprehensively Efficient Analysis of Nonlinear Wire Scatterers Considering Lossy Ground and Multi-tone Excitations

2020 ◽  
Vol 35 (8) ◽  
pp. 878-886
Author(s):  
Amir Bahrami ◽  
Saeed Ostadzadeh
Keyword(s):  
Harmonic Balance ◽  
Operator Method ◽  
Nonlinear Loads ◽  
Approximate Methods ◽  
Strongly Nonlinear ◽  
Intelligent Water Drops Algorithm ◽  
Water Drops ◽  
Two Stages ◽  
Port Structures ◽  
Arithmetic Operator

In this paper based on intelligent water drops algorithm (IWD), comprehensively nonlinear analysis of nonlinearly loaded wire scatterers are carried out. The analyses involve two stages. First, the problem is modeled as a nonlinear multi-port equivalent circuit and it is then reformulated into an optimization problem which is solved by the IWD. The simulation results are compared with harmonic balance (HB), arithmetic operator method (AOM), approximate methods and experiment. Analysis of the problem under strongly nonlinear loads, presence of lossy ground, multi-port structures, and multi-ton excitations are included to cover all the complex aspects. In one hand, the proposed modeling approach is in excellent agreement with other conventional techniques. On the other hand, the run time is considerably reduced.

An Enhanced Intelligent Water Drops Algorithm for Scheduling of an Agile Manufacturing System

2016 ◽  
Vol 15 (02) ◽  
pp. 239-266 ◽  
Author(s):  
Ehsan Teymourian ◽  
Vahid Kayvanfar ◽  
GH. M. Komaki ◽  
Majtaba Khodarahmi
Keyword(s):  
Artificial Immune System ◽  
Manufacturing System ◽  
Agile Manufacturing ◽  
Artificial Immune ◽  
Flexible Machine ◽  
Second Stage ◽  
Intelligent Water Drops Algorithm ◽  
Water Drops ◽  
Intelligent Water Drops ◽  
Two Stages

This paper deals with an agile manufacturing system with two stages where the first stage is the machining stage including a single flexible machine while the second stage is assembly stage including parallel identical assembly machines. Products have an assembly structure where their parts should be processed at the first stage and then proceed to the assembly stage. The goal is to find the parts sequence which minimizes makespan. Since the studied problem is NP-hard, enhanced intelligent water drops (EIWD) algorithm as a new swarm-based nature inspired optimization algorithm is proposed. Also, artificial immune system (AIS) algorithm has been proposed to tackle the addressed problem. Computational results based on randomly generated instances show the effectiveness of the proposed technique.

scholarly journals Hybrid Intelligent Water Drops Algorithm for Examination Timetabling Problem

2021 ◽  
Author(s):  
Bashar A. Aldeeb ◽  
Mohammed Azmi Al-Betar ◽  
Norita Md Norwawi ◽  
Khalid A. Alissa ◽  
Mutasem K. Alsmadi ◽  
...  
Keyword(s):  
Examination Timetabling ◽  
Timetabling Problem ◽  
Intelligent Water Drops Algorithm ◽  
Water Drops ◽  
Intelligent Water Drops

scholarly journals Energy-Efficient Incentives Resource Allocation Scheme in Cooperative Communication System

2018 ◽  
Vol 2018 ◽  
pp. 1-8
Author(s):  
Zi Yan Liu ◽  
Pan Mao ◽  
Li Feng ◽  
Shi Mei Liu
Keyword(s):  
Resource Allocation ◽  
Energy Efficiency ◽  
Cooperative Communication ◽  
Communication System ◽  
Allocation Scheme ◽  
Network Nodes ◽  
Intelligent Water Drops Algorithm ◽  
Water Drops ◽  
Resource Allocation Scheme ◽  
Qos Performance

Appropriate resource allocation has great significance to enhance the energy efficiency (EE) for cooperative communication system. The objective is to allocate the resource to maximize the energy efficiency in single-cell multiuser cooperative communication system. We formulate this problem as subcarrier-based resource allocation and solve it with path planning in graph theory. A two-level neural network model is designed, in which the users and subcarrier are defined as network nodes. And then we propose an improved intelligent water drops algorithm combined with Genetic Algorithm; boundary condition and initialization rules of path soil quantity are put forward. The simulation results demonstrate that the proposed resource allocation scheme can effectively improve the energy efficiency and enhance QoS performance.

Intelligent Water Drops Algorithm for Multimodal Spaces

2015 ◽  
pp. 14-26
Author(s):  
Harish Y. ◽  
Venkateshwarlu B. ◽  
Chakravarthi Jada ◽  
Kranthi Kumar R. ◽  
Irfan Feroz G.
Keyword(s):  
Intelligent Water Drops Algorithm ◽  
Water Drops ◽  
Intelligent Water Drops

scholarly journals The Spreading Residue Harmonic Balance Method for Strongly Nonlinear Vibrations of a Restrained Cantilever Beam

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Y. H. Qian ◽  
J. L. Pan ◽  
S. P. Chen ◽  
M. H. Yao
Keyword(s):  
Exact Solutions ◽  
Nonlinear Vibration ◽  
Harmonic Balance ◽  
Nonlinear Dynamical Systems ◽  
Harmonic Balance Method ◽  
Time History ◽  
Approximate Solutions ◽  
Balance Method ◽  
Lumped Mass ◽  
Strongly Nonlinear

The exact solutions of the nonlinear vibration systems are extremely complicated to be received, so it is crucial to analyze their approximate solutions. This paper employs the spreading residue harmonic balance method (SRHBM) to derive analytical approximate solutions for the fifth-order nonlinear problem, which corresponds to the strongly nonlinear vibration of an elastically restrained beam with a lumped mass. When the SRHBM is used, the residual terms are added to improve the accuracy of approximate solutions. Illustrative examples are provided along with verifying the accuracy of the present method and are compared with the HAM solutions, the EBM solutions, and exact solutions in tables. At the same time, the phase diagrams and time history curves are drawn by the mathematical software. Through analysis and discussion, the results obtained here demonstrate that the SRHBM is an effective and robust technique for nonlinear dynamical systems. In addition, the SRHBM can be widely applied to a variety of nonlinear dynamic systems.

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