نتایج جستجو برای: genetic algorithms optimization ducted propeller efficiency vibration

تعداد نتایج: 1542951  

Journal: :biquarterly journal of control and optimization in applied mathematics 2015
akbar hashemi borzabadi manije hasanabadi naser sadjadi

in this paper an approach based on evolutionary algorithms to find pareto optimal pair of state and control for multi-objective optimal control problems (moocp)'s is introduced‎. ‎in this approach‎, ‎first a discretized form of the time-control space is considered and then‎, ‎a piecewise linear control and a piecewise linear trajectory are obtained from the discretized time-control space using ...

ژورنال: مهندسی دریا 2017

Hydrodynamic analysis of the marine propulsors with complex geometry such as podded drive systems, ducted propellers, and waterjet systems are more complicated than conventional propeller systems. This fact has caused the usage and development of numerical methods and techniques. The hybrid method to couple the Blade Element Momentum Theory (BEMT) with Reynolds-Averaged Navier Stokes method (RA...

Journal: :Advances in Science and Technology – Research Journal 2013

Journal: :international journal of automotive engineering 0
salehpour islamic azad university, anzali branch, bandaranzali, iran. jamali faculty of mechanical engineering, the university of guilan, rasht, iran. nariman-zadeh faculty of mechanical engineering, the university of guilan, rasht, iran.

in this paper, multi-objective uniform-diversity genetic algorithm (muga) with a diversity preserving mechanism called the ε-elimination algorithm is used for pareto optimization of 5-degree of freedom vehicle vibration model considering the five conflicting functions simultaneously. the important conflicting objective functions that have been considered in this work are, namely, vertical accel...

Journal: :Energies 2022

Channel wing is a propeller-coupling layout that has good low-speed performance and S/VTOL potential. Focused on the application of this at stage, paper attempts to find interaction mechanism for distributed propeller channel wing. Firstly, computation method based RANS equations propeller–wing integration was established with Momentum Source Method, which compared unsteady Sliding Mesh validat...

Journal: :journal of advances in computer research 0

the traveling salesman problem (tsp) is the problem of finding the shortest tour through all the nodes that a salesman has to visit. the tsp is probably the most famous and extensively studied problem in the field of combinatorial optimization. because this problem is an np-hard problem, practical large-scale instances cannot be solved by exact algorithms within acceptable computational times. ...

Design and manufacturing of a high performance micro-hydro-kinetic turbine is discussed in the present paper. The main goal is manufacturing an equipped experimental model of hydro-kinetic turbine with highest energy absorption from water current. A multi-shape ducted turbine comprised of a multi-part diffuser was manufactured that can be converted to many experimental models for studying vario...

برکاتی, سید مسعود , توکلی افشار, سعید , حجتی نجف آبادی, ابراهیم ,

The application of Flexible AC Transmission System (FACTS) devices shows that they can control the power system technical parameters effectively. However, optimal placement and sizing of them are difficult problems and analytical methods cannot be used to solve these problems. To solve such problems, some evolutionary algorithms are employed. The efficiency of these algorithms is related to the...

Journal: :journal of advances in computer research 0

the speech enhancement techniques are often employed to improve the quality and intelligibility of the noisy speech signals. this paper discusses a novel technique for speech enhancement which is based on singular value decomposition. this implementation utilizes a genetic algorithm based optimization method for reducing the effects of environmental noises from the singular vectors as well as t...

Blind source separation technique separates mixed signals blindly without any information on the mixing system. In this paper, we have used two evolutionary algorithms, namely, genetic algorithm and particle swarm optimization for blind source separation. In these techniques a novel fitness function that is based on the mutual information and high order statistics is proposed. In order to evalu...

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