Browsing by Author "Duman, Ekrem"
Now showing items 1-20 of 33
-
Allocation of component types to machines in the automated assembly of printed circuit boards
Although the use of electronic component placement machines has brought reliability and speed to the printed circuit board (PCB) assembly process, to get higher utilization, one needs to solve the resulting complex operations ... -
Assembly time minimization for an electronic component placement machine
Alkaya, Ali Fuat; Duman, Ekrem; Eyler, Akif (WSEAS Transactions on Computers, 2008)In this study, a new algorithm component placement machine is proposed. Also, a pairwise exchange procedure is designed and applied after the proposed algorithm. In the analyzed machine, previously proposed algorithms were ... -
Assembly time minimization for an electronic component placement machine
Alkaya, Ali Fuat; Duman, Ekrem; Eyler, Akif (World Scientific and Engineering Academy and Society, 2008-04)In this study, a new algorithm for a particular component placement machine is proposed. Also, a pairwise exchange procedure is designed and applied after the proposed algorithm. In the analyzed machine, previously proposed ... -
Assembly time minimization of a particular placement machine
Alkaya, Ali Fuat; Duman, Ekrem (WSEAS Press, 2007-12-29)A new algorithm for a component placement machine is proposed in this study. The new algorithm is compared with former approaches on synthetically generated benchmark instances. It outperforms the former approaches by 3.28% ... -
Automated assembly of printed circuit boards: iterative solution of placement sequencing and feeder configuration problems
Duman, Ekrem; Ceranoğlu, Ahmet Nuri (2003-09)In automated assembly of printed circuit boards, the placement sequencing and feeder configuration problems turns out to be two of the four major problems that need to be solved efficiently to get better utilization from ... -
Comparing alternative classifiers for database marketing: the case of imbalanced datasets
Duman, Ekrem; Ekinci, Yeliz; Tanrıverdi, Aydın (Elsevier, 2012-01)There are various algorithms used for binary classification where the cases are classified into one of two non-overlapping classes. The area under the receiver operating characteristic (ROC) curve is the most widely used ... -
Decision making by simulation in a parcel transportation company
Duman, Ekrem (Elsevier, 2007-08)This study is based on an actual simulation application project carried out for a parcel transportation company. In its current system, the company has a wide network of branches throughout the country. Although, it is ... -
Detecting credit card fraud by ANN and logistic regression
Şahin, Yusuf Gürcan; Duman, Ekrem (IEEE, 2011-06)With the developments in information technology and improvements in communication channels, fraud is spreading all over the world, resulting in huge financial losses. Though fraud prevention mechanisms such as CHIP&PIN are ... -
Detecting credit card fraud by decision trees and support vector machines
Şahin, Yusuf G.; Duman, Ekrem (Newswood Limited, 2011-03)With the developments in the Information Technology and improvements in the communication channels, fraud is spreading all over the world, resulting in huge financial losses. Though fraud prevention mechanisms such as ... -
Detecting credit card fraud by genetic algorithm and scatter search
Duman, Ekrem; Özçelik, M. Hamdi (Elsevier, 2011-09-15)In this study we develop a method which improves a credit card fraud detection solution currently being used in a bank. With this solution each transaction is scored and based on these scores the transactions are classified ... -
Dispatching rules for allocation of component types to machines in the automated assembly of printed circuit boards
Yıldırım, Mehmet Bayram; Duman, Ekrem; Duman, Dilek (Springer, 2006)In this paper, we propose a model and algorithms to solve a load balancing problem on a printed circuit board assembly line. On this line of two identical machines, the problem of allocation of component types to machines ... -
Elektronik dizgi işlemlerinin eniyilenmesi ve değişken maliyetli seyyar satıcı problemi
Duman, Ekrem; Alkaya, Ali Fuat (TÜBİTAK, 2011-01)Bu projede baskılı devre kartları (BDK) dizgi işlemlerinde ortaya çıkan yeni bir gezgin satıcı problemi (GSP) üzerinde çalışmalar yapılmış, sıraya dayalı GSP adı verilen bu problemin önce matematiksel modeli geliştirilmiş ... -
Exact and metahueristic approaches for optimizing the operations of chip mounter machines
Demirkale, Hüseyin; Duman, Ekrem; Alkaya, Ali Fuat (IEEE, 2010-10)Artificial bee colony (ABC) algorithm is recently proposed algorithm that is inspired from the foraging behavior of honey bees in nature. ABC has been applied to the continuous numerical problems. In this study, we exploit ... -
An experimental analysis of human factors on the system performance
Erensal, Yasemin Claire; Duman, Ekrem (Istanbul Technical University, 2005)It is often argued from an economic and ergonomic point of view that ergonomic considerations should be integrated into the planning processes, but it is seldom the case in practice. Tools for establishing this integration ... -
Finding best performing solution algorithm for the QAP
Kıyıcığı, Burcu Müzeyyen (Doğuş Üniversitesi Fen Bilimleri Enstitüsü, 2010-06)The quadratic assignment problem (QAP) of NP-Hard problems class is known as one of the hardest combinatorial optimization problems. In this thesis, a search is performed on the metaheuristics that have recently found ... -
Heuristics for a generalization of TSP in the context of PCB assembly
Alkaya, Ali Fuat; Duman, Ekrem (Doğuş Üniversitesi, 2009-02)Traveling Salesman Problem (TSP) is one of the most well-known NP-Hard combinatorial optimization problems. Adding new constraints to the problem yields different generalizations to the problem and each new generalization ... -
Improving a credit card fraud detection system using genetic algorithm
Özçelik, M. Hamdi; Işık, Mine; Duman, Ekrem; Çevik, Tuğba (IEEE, 2010-06)In this study we undertook the credit card fraud detection problem of a bank and tried to improve the performance of an existing solution. In doing so, we did not undertake the typical objective of maximizing the number ... -
Information systems in financial markets, e-business, banking, accounting, marketing - comparison of decision tree algorithms in identifying bank customers who are likely to buy credit cards
Duman, Ekrem (IEEE, 2006)In predictive data mining projects, the decision tree algorithms are usually preferred to others since they are easier to interpret business wise. In this study, we describe and test various strategies in cross sell modeling ... -
A literature survey of the operation optimization in chip shooter placement machines
Alkaya, Ali Fuat; Duman, Ekrem (IEEE, 2009)Computer controlled electronic component placement machines have become major resources in electronic equipment manufacturers. They brought speed and reliability to the assembly operations. However, these machines are quite ... -
Migrating birds optimization: a new meta - heuristic approach and its application to the quadratic assignment problem
Duman, Ekrem; Uysal, Mitat; Alkaya, Ali Fuat (Springer Verlag, 2011)In this study we propose a new nature inspired metaheuristic approach based on the V formation flight of the migrating birds which is proven to be an effective formation in energy minimization. Its performance is tested ...
