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Evolutionary Approach for Traveling Salesperson Problem with Precedence Constraints
Chiung Moon(문치웅),YoungSu Yun(윤영수) 한국지능시스템학회 2007 한국지능시스템학회 학술발표 논문집 Vol.17 No.1
In this paper we suggest an efficient evolutionary approach based on topological sort techniques for precedence constrained TSPs. The determination of optimal sequence has much to offer to downstream project management and opens up new opportunities for supply chains and logistics. Experimental results show that the suggested approach is a good alternative to locate optimal solution for complicated precedence constrained sequencing as in optimization method for instance.
Evolutionary Algorithm for Process Plan Selection with Multiple Objectives
MOON, Chiung,LEE, Younghae,GEN, Mitsuo Korean Institute of Industrial Engineers 2004 Industrial Engineeering & Management Systems Vol.3 No.2
This paper presents a process plan selection model with multiple objectives. The process plans for all parts should be selected under multiple objective environment as follows: (1) minimizing the sum of machine processing and material handling time of all the parts considering realistic shop factors such as production volume, processing time, machine capacity, and capacity of transfer device. (2) balancing the load between machines. A multiple objective mathematical model is proposed and an evolutionary algorithm with the adaptive recombination strategy is developed to solve the model. To illustrate the efficiency of proposed approach, numerical examples are presented. The proposed approach is found to be effective in offering a set of satisfactory Pareto solutions within a satisfactory CPU time in a multiple objective environment.
공정순서에 기초한 생산셀 설계를 위한 유전 알고리즘 접근
문치웅,김재균 한국경영과학회 1998 한국경영과학회지 Vol.23 No.3
A cell design model based on operation sequence is proposed for maximizing the total parts flow within cells considering the data of process plans for parts, production volume, and cell size. A relationship between machines is calculated on the basis of the process plans for parts obtained from process plan sheets. Then the machines are classified into machine cells using the relationship. The model is formulated as a 0-1 integer programming and a genetic algorithm approach is developed to solve the model. The developed approach is tested and proved using actual industrial data. Experimental results indicate that the approach is appropriate for large-size cell design problems efficiently.
Adaptive Genetic Algorithm with Local Search for Solving Reliability Optimization Design Problems
YoungSu Yun,Chiung Moon 한국경영과학회 2008 한국경영과학회 학술대회논문집 Vol.2008 No.5
This paper suggests an adaptive genetic algorithm with local search (aGA-ls) for efficient solving reliability optimization design problems. The aGA-ls has the adaptive scheme which can automatically determine the use of local search technique and adaptively regulate the rate of crossover and mutation operations in genetic algorithm (GA) during its search process. For local search technique, an improved iterative hill climbing method is used and incorporated into GA loop. The adaptive scheme used in the aGA-ls considers the change of the variances resulting from various fitness values of population in each generation. In order to demonstrate the efficiency of aGA-ls, we also consider i) a canonical GA without adaptive scheme and local search technique, ii) a canonical GA with local search technique alone, and iii) several adaptive GAs (aGAs) with various adaptive schemes. These algorithms, including aGA-ls, have been tested and analyzed in application to a variety of reliability optimization design problems. Numeric performance measures show that the proposed aGAls outperforms conventional algorithms.
Adaptive Genetic Algorithm with Local Search for Solving Reliability Optimization Design Problems
YoungSu Yun,Chiung Moon 대한산업공학회 2008 대한산업공학회 춘계학술대회논문집 Vol.2008 No.5
This paper suggests an adaptive genetic algorithm with local search (aGA-ls) for efficient solving reliability optimization design problems. The aGA-ls has the adaptive scheme which can automatically determine the use of local search technique and adaptively regulate the rate of crossover and mutation operations in genetic algorithm (GA) during its search process. For local search technique, an improved iterative hill climbing method is used and incorporated into GA loop. The adaptive scheme used in the aGA-ls considers the change of the variances resulting from various fitness values of population in each generation. In order to demonstrate the efficiency of aGA-ls, we also consider i) a canonical GA without adaptive scheme and local search technique, ii) a canonical GA with local search technique alone, and iii) several adaptive GAs (aGAs) with various adaptive schemes. These algorithms, including aGA-ls, have been tested and analyzed in application to a variety of reliability optimization design problems. Numeric performance measures show that the proposed aGAls outperforms conventional algorithms.
朴晟佑 ( Park Seongwoo ),文致雄 ( Moon Chiung ) 중국어문연구회 2020 中國語文論叢 Vol.0 No.101
In this study, we address a literal·historical understanding of ‘Cheongang (天降)’, which was interpreted as ‘come down from the sky(or heaven)’. Cheongang is emerging element in the process of founding the ancient state. An existing interpretation that come down from the sky(or heaven) was came from an understanding of myth frame. In myth frame, ‘Cheongang(天降)’ was interpreted that, we emphasize sacredness through the connection with the heavens or emphasizing the legitimacy of government. But simultaneously, it has also served as a limit that made an accurate review of the times and circumstance impossible. The interpretation of Cheongang(天降), ‘come down from the sky(heaven)’, is the result of faithful application of the primary meaning as written in dictionary. Cheon(天) is sky(heaven), gang(降) is come down or refers to the act of surrendering to the enemy. From the comprehensive analysis of the records of other ancient literature and the excavated texts, we can understand cheon(天)’s various meanings. In addition to the abstract meaning of sky, cheon(天) points to the existence of the most precious and high-ranking area or person in the world. However, people cannot come down from the sky. Therefore the Cheongang(天降) that defined as the come down from the sky is unscientific and unrealistic. This is the result of the lack of understanding about the meaning of Cheon(天) and Gang(降). In here, we extensively collected the excavated texts and literature of the related to ancient Cheon(天) and Gang(降) made a literal analysis and discussion of the character shape and meaning of Cheongang(天降).
서주(西周) 청동기(青銅器) 명문(銘文)에 나타난 ‘천명(天命)’의 의미와 활용
박성우 ( Park Seongwoo ),문치웅 ( Moon Chiung ) 한국중국언어학회 2021 중국언어연구 Vol.- No.93
We can find records of ‘Heaven’s command (天命)’ in the literature and excavated materials prior of the Qin Dynasty. The Heaven’s command was an command order that had a significant impact on the actions and decisions of the ancient china’s kings. They carried out an order by command of the Heaven emperor and also the Heaven’s command was actively used as a means to effectively govern the country along with the legitimacy of power in connection with the ruling class. The term Heaven’s command was frequently used in sentences inscribed on bronze vessels made during the Zhou Dynasty. At that time, Heaven was recognized as a central area that ruled East Asia, creating and developing all things for people, and where the emperor lived. Heaven also played a key role in important historical projects such as the Chisu (治水) project, the replacement of the Ha (夏) and Shang (商) Dynasties, and the replacement of the Shang and Zhou (周) Dynasties. During the national project and the replacement of the dynasty, there was Heaven command ordered by Heaven. Records of these texts and excavated materials suggest that, the ancient times, Heaven was considered the most important place to serve as the center of the empire or the federal headquarters. However, Heaven gradually lost its power during the Warring States period and became symbolic, and Heaven command was changed to an abstract meaning of absolute command or mandatory instructions.