نتایج جستجو برای: two approaches consisting multilevel optimization method using advance

تعداد نتایج: 6266838  

Journal: :international journal of industrial engineering and productional research- 0
mahdi bashiri shahed university mahdyeh shiri shahed university mohammad hasan bakhtiarifar shahed university

there are many real problems in which multiple responses should be optimized simultaneously by setting of process variables. one of the common approaches for optimization of multi-response problems is desirability function. in most real cases, there is a correlation structure between responses so ignoring the correlation may lead to mistake results. hence, in this paper a robust approach based ...

Journal: :Numerical Lin. Alg. with Applic. 2004
Gregory Dardyk Irad Yavneh

The two-dimensional phase unwrapping problem is studied. Using the minimum Lp-norm approach, we apply three different nonlinear multigrid algorithms for reconstructing surfaces from their “wrapped” values—two classical approaches and a novel Multilevel Nonlinear Method (MNM). The methods prove to be efficient even for difficult problems with noisy and discontinuous original images. The new meth...

Journal: :Neurocomputing 2014
Diego Oliva Erik Valdemar Cuevas Jiménez Gonzalo Pajares Daniel Zaldivar Valentín Osuna-Enciso

Segmentation is one of the most important tasks in image processing. It consist in classify the pixels into two or more groups depending on their intensity levels and a threshold value. The quality of the segmentation depends on the method applied to select the threshold. The use of the classical implementations for multilevel thresholding is computationally expensive since they exhaustively se...

Journal: :international journal of civil engineering 0
a. kaveh iust a. shakouri mahmud abadi bhrc s. zolfaghari moghaddam hihe

this paper presents a strategy for using harmony search algorithm in facility layout optimization problems. in this paper an adapted harmony search algorithm is developed for solving facility layout optimization problems. this method finds an optimal facility arrangement in an existing layout. two real-world case studies are employed to demonstrate the efficiency of this model. a comparison is ...

2015
JORGE LUIS DIAZ

This paper presents an optimization of the electric power quality by designing a 9 steps multilevel power inverter, which adopts a multi-PWM optimized using genetic algorithms (GA), and minimizing Total Harmonic Distortion (THD) of the first 50 harmonics to about 0%. This optimization is considered an alternative technique because it reduces the expression used to quantify TDH numerically. Part...

Journal: :SIAM J. Scientific Computing 2007
Scott P. MacLachlan Yousef Saad

Efficient solution of the very large linear systems that arise in numerical modelling of real-world applications is often only possible through the use of multilevel techniques. While highly optimized algorithms may be developed using knowledge about the origins of the matrix problem to be considered, much recent interest has been in the development of purely algebraic approaches that may be ap...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سمنان - دانشکده برق و کامپیوتر 1390

چکیده-پخش بار بهینه به عنوان یکی از ابزار زیر بنایی برای تحلیل سیستم های قدرت پیچیده ،برای مدت طولانی مورد بررسی قرار گرفته است.پخش بار بهینه توابع هدف یک سیستم قدرت از جمله تابع هزینه سوخت ،آلودگی ،تلفات را بهینه می کند،و هم زمان قیود سیستم قدرت را نیز برآورده می کند.در کلی ترین حالتopf یک مساله بهینه سازی غیر خطی ،غیر محدب،مقیاس بزرگ،و ایستا می باشد که می تواند شامل متغیرهای کنترلی پیوسته و گ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه اراک - دانشکده علوم پایه 1389

abstract in this thesis at first we comput the determinant of hankel matrix with enteries a_k (x)=?_(m=0)^k??((2k+2-m)¦(k-m)) x^m ? by using a new operator, ? and by writing and solving differential equation of order two at points x=2 and x=-2 . also we show that this determinant under k-binomial transformation is invariant.

Journal: :international journal of optimaization in civil engineering 0
e. ghandi n. shokrollahi m. nasrolahi

this paper presents a cuckoo optimization algorithm (coa) model for the cost optimization of the one-way and two-way reinforced concrete (rc) slabs according to aci code. the objective function is the total cost of the slabs including the cost of the concrete and that of the reinforcing steel. in this paper, one-way and two-way slabs with various end conditions are formulated as aci code. the t...

2009
Naobumi V. Sasaki Naoki Sato

In case of closely related bacterial genomes, segments of conserved gene order that referred to synteny blocks are observed by mapping orthologous genes (or simply called orthologs) to each genome. In many cases, they share the stable structure consisting of synteny blocks, which are often called ‘genomic core’. This structure is a marker for the structural evolution in these genomes. They also...

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