نتایج جستجو برای: pso دودویی بهبود یافته

تعداد نتایج: 211556  

2015
Qi Wu Fenfen Xiong

In simulation-based design optimization, one of the greatest challenges is the intensive computing burden. In order to reduce the computational time, a parallel implementation of the particle swarm optimization (PSO) algorithm on graphic processing unit (GPU) is presented in this paper. Instead of executed on the central processing unit (CPU) in a serial manner, the PSO algorithm is executed in...

ژورنال: :پژوهش های تجربی حسابداری 2013
زهره امینی فرد مهدی صالحی

از آنجا که پیش بینی سود نقدی شرکت ها یکی از منابع اطلاعاتی با ارزش برای سرمایه گذاران و دیگر افراد ذینفع است، پژوهش حاضر تلاش می کند مدل هایی برای پیش بینی متغیرهای تأثیرگذار بر سود نقدی سهام پیشنهاد کند. برای این کار از اطلاعات شرکت های شیمیایی پذیرفته شده در بورس تهران بین سال های 1385 تا 1389 استفاده شده است. متغیرهای مستقل این تحقیق نسبت های حسابداری و متغیر وابسته سود نقدی سهام است. چارچوب...

2015
Frumen Olivas Fevrier Valdez Oscar Castillo

In this paper a new method for dynamic parameter adaptation in particle swarm optimization (PSO) is proposed. PSO is a metaheuristic inspired in social behaviors, which is very useful in optimization problems. In this paper we propose an improvement to the convergence and diversity of the swarm in PSO using fuzzy logic. Simulation results show that the proposed approach improves the performance...

2008
Dirk Sudholt Carsten Witt

We investigate the runtime of the Binary Particle Swarm Optimization (PSO) algorithm introduced by Kennedy and Eberhart (1997). The Binary PSO maintains a global best solution and a swarm of particles. Each particle consists of a current position, an own best position and a velocity vector used in a probabilistic process to update the particle’s position. We present lower bounds for a broad cla...

2014
HAYDER M. ALBEHADILI N. E. ISLAM

Although Particle Swarm Optimization (PSO) is used in variety of applications; it has limitations in the training phase. In this work, a new enhancement for PSO is proposed to overcome such limitations. The proposed PSO optimization consists of two stages. In the first stage, a Gaussian Maximum Likelihood (GML) is added to PSO to update the last 25% of swarm particles, while in the second stage...

2006
Jing Jie Jianchao Zeng Chongzhao Han

Swarm-diversity is an important factor influencing the global convergence of particle swarm optimization (PSO). In order to overcome the premature convergence, the paper introduced a negative feedback mechanism into particle swarm optimization and developed an adaptive PSO. The improved method takes advantage of the swarm-diversity to control the tuning of the inertia weight (PSO-DCIW), which i...

2007
Tao Gong Andrew L. Tuson

Particle Swarm Optimization (PSO) is an innovative and competitive optimization technique for numerical optimization with real-parameter representation. This paper examines the working mechanism of PSO in a principled manner with forma analysis and investigates the applicability of PSO on the Quadratic Assignment Problem (QAP). Particularly, the derived PSO operator for QAP is empirically studi...

2009
MILAN R. RAPAIĆ ŽELJKO KANOVIĆ ZORAN D. JELIČIĆ

In this paper an extensive empirical analysis of recently introduced Particle Swarm Optimization algorithm with Convergence Related parameters (CR-PSO) is presented. The algorithm is tested on extended set of benchmarks and the results are compared to the PSO with time-varying acceleration coefficients (TVAC-PSO) and the standard genetic algorithm (GA). Key-Words: Global Optimization, Particle ...

2006
Jingsong He Zhenyu Yang Xin Yao

Particle swarm optimization (PSO) and fast evolutionary programming (FEP) are two widely used population-based optimisation algorithms. The ideas behind these two algorithms are quite different. While PSO is very efficient in local converging to an optimum due to its use of directional information, FEP is better at global exploration and finding a near optimum globally. This paper proposes a no...

2013
Qingjian Ni Jianming Deng

Population topology of particle swarm optimization (PSO) will directly affect the dissemination of optimal information during the evolutionary process and will have a significant impact on the performance of PSO. Classic static population topologies are usually used in PSO, such as fully connected topology, ring topology, star topology, and square topology. In this paper, the performance of PSO...

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