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주병준(Byeong Jun Joo),배혜림(Hye Rim Bae) 한국SCM학회 2016 한국SCM학회지 Vol.16 No.2
In order for recent manufacturing to meet customer demand in the complex production environments, many conditions need to be satisfied. In such environments of the increased order requirements of the production, the frequent change of the production process may occur. With current production technology, it is difficult to prepare an exact process plan due to the uncertain customer demand. In this paper, we develop a method to prepare a production process by utilizing artificial neural network (ANN) to classify the process into a cluster group considering the various requirements. As a result, we expect that it can contribute to improving the efficiency of real steel manufacturing company, of which we will show a case study.
Byung-Jun Joo(주병준),Yeong-Dae Kim(김영대),June-Young Bang(방준영) 대한산업공학회 2009 대한산업공학회지 Vol.35 No.4
This paper focuses on the problem of scheduling wafer lots with limited waiting times between pairs of consecutive operations in a semiconductor wafer fabrication facility. For the problem of minimizing total tardiness of orders, we develop a priority rule?based scheduling method in which a scheduling decision for an operation is made based on the states of workstations for the operation and its successor or predecessor operation. To evaluate performance of the suggested scheduling method, we perform simulation experiments using real factory data as well as randomly generated data sets. Results of the simulation experiments show that the suggested method performs better than a method suggested in other research and the one that has been used in practice.
李玄燦,朱柄俊,洪忠成 弘益大學校 科學技術硏究所 2001 科學技術硏究論文集 Vol.12 No.-
Recently, designing and visualizing 3D objects become getting more important issues in related industrial fields due to new trends such as Virtual Design using CAD(Computer-Aided Design) systems and high-speeded internet. In this paper, we compare the existing surface subdivision algorithms. Subdivision algorithm is a 3D modeling technique that generates a very smooth surface through many times of refinement processes that split polygons of control mesh into several smaller polygons. We examine the methods of calculating new vertices and topological algorithms of three existing subdivision algorithms, Doo-Sabin, Catmull-Clark, and Loop subdivision scheme in detail, and compare them to find the differences, merits and demerits. In calculating new vertices, Doo-Sabin scheme is simpler than Catmull-Clark and Loop schemes. But in topological algorithm, Catmull-Clark and Loop schemes are simpler than Doo-Sabin scheme.