• Journal of the military operations research society of Korea
• /
• v.36 no.3
• /
• pp.29-42
• /
• 2010

In this study, the weapon-target assignment problem arising in military application of operations research is considered. We reformulated the problem in order to simplify the solution methods based on genetic algorithms and heuristics. Since the problem is well known as NP-complete and cannot be solved in polynomial time, such solution methods have been widely used to obtain good solutions. Two chromosome representations--target number representation and permutation representation--in genetic algorithm are compared. In addition, a construction heuristic and three improving heuristics are developed. Several experiments under the condition of transitivity rules in weapon's kill probability have been accomplished. It shows that the construction heuristic and exchange-based improving heuristic guarantees good solutions within a second and the performance of construction heuristic is sensitive to transitivity rules.

• The Journal of the Korea institute of electronic communication sciences
• /
• v.11 no.10
• /
• pp.969-982
• /
• 2016

Recently, the researches to discovery drug candidates from natural herbs have received considerable attention. In human body, enzyme mostly metabolize the compounds of natural herbs. In this study, we analysis the enzyme interactions using assoication mining. We get this data from BRENDA(: BRaunschweig ENzyme DAtabase) system. Based on enzyme interaction model, we divide the metabolites into substrate metabolites, product metabolites, inhibitor metabolites, and activating metabolites. We then compose substrate metabolite transaction, product metabolite transaction with each metabolites and enzyme interaction transaction with all metabolites. Also we take account of organism for each transactions. We mine frequent metabolites and patterns from six transactions using association rule mining. And we analysis the relationship among metabolites. As a result, we identify the distributions and patterns of metabolites consist in enzyme interactions. We found that metabolites include in only substrate are identified and have very low supports. This results can be useful to develop the effective metabolism prediction model for compounds of natural herbs.

• Journal of the Korean Geographical Society
• /
• v.47 no.6
• /
• pp.825-835
• /
• 2012

The aim of this research is to develope technique and mapping for detecting distribution of vegetation dieback areas in the subalpine zone of Mt. Baekdu. A detection technique developed the rule-based model using MODIS images. Dieback areas could be classified as 4 categories of initial dieback, middle dieback, and end dieback by pruning stages of leaves. Dieback area was $28km^2$ from year 2001 to year 2006, intial dieback was $16km^2$, middle dieback was $10km^2$, and end dieback was $2km^2$ by the each stage. Dieback area was $35km^2$ from year 2006 to year 2011. Total area was $35km^2$ from year 2001 to year 2011, areas of middle dieback and end dieback were increased. The research method for this study may help to support in application with preliminary detection of dieback areas in the mountains by the global warming.

• Journal of the Korean Data and Information Science Society
• /
• v.22 no.2
• /
• pp.235-243
• /
• 2011

The most widely used data mining technique is to explore association rules. This technique has been used to find the relationship between each set of items based on the association thresholds such as support, confidence, lift, etc. There are many interestingness measures as the criteria for evaluating association rules. Among them, confidence is the most frequently used, but it has the drawback that it can not determine the direction of the association. The net confidence measure was developed to compensate for this drawback, but it is useless in the case that the value of positive confidence is the same as that of negative confidence. This paper propose a attributably pure confidence to evaluate association rules and then describe some properties for a proposed measure. The comparative studies with confidence, net confidence, and attributably pure confidence are shown by numerical example. The results show that the attributably pure confidence is better than confidence or net confidence.

• Journal of KIISE
• /
• v.42 no.9
• /
• pp.1147-1161
• /
• 2015

The ISO/IEC 11179 Metadata registry (MDR) is an international standard that was developed to register and share metadata. ISO/IEC 11179 represents an MDR as a metamodel that is an object model. However, it is difficult to develop an MDR based on ISO/IEC 11179 because the standard has no clear criteria to transform the metamodel into a database. In this paper, we suggest the design of an MDR data model that is based on object-relational transformation methodology (ORTM) for the MDR implementation. Hence, we classify the transformation methods of ORTM according to the corresponding relationships. After classification, we propose modeling rules by defining the standard use of the transformation. This paper builds the relational database tables as an implementation result of an MDR data model. Through experiments and evaluation, we verify the proposed modeling rules and evaluate the suitability of the created table structures. As the result, the proposed method shows that the table structures preserve classes and relationships of the standard metamodel well.

• Journal of Korea Water Resources Association
• /
• v.56 no.12
• /
• pp.929-937
• /
• 2023

This study aims to develop rules for the Determination of Drought Stages at the Local Level based on the drought cases in Gwangju and Jeollanam-do in 2022-2023. Among the eight drought indicators provided, six indicators (Agricultural drought stage (for paddy), Residential & industrial drought stage, SPI-12, Relative agricultural water storage, Residential water consumption change (for domestic use), Residential water consumption change (for non-domestic use) were confirmed to have statistical correlations with the perceptions of local government officials and experts. Additionally, this drought indicator was applied to a decision tree algorithm to develop rules for determining the severity of drought. Although it presented results similar to those of the existing method presented in previous studies, it showed a significant comparative advantage in explaining the temporal and spatial patterns of drought in the Gwangju and Jeollanam-do.

• Monthly Korean Chicken
• /
• v.5 no.2 s.44
• /
• pp.2-6
• /
• 1999

농림부, 축산경영자금 상환 연기 - 99년 종계 양허관세 물량 배정 -가축방역사업 예산 2백41억원 - 농림부, 가료관리법 시행규칙 개정 - 우리나라 육계사육수수 세계 21위권 - 미국의 닭고기 수급 하락세 - 중국, 축산물수출 부진 - 축협 - 육계 계약농가선정 본격화 - 알레르기 없는 옻닭 개발 - 대만, 가금육 소비증가율 높아 - 구조조정에 따른 닭고기 공급 부족으로 가격 강세

• 한국가스학회:학술대회논문집
• /
• 2000.09a
• /
• pp.157-162
• /
• 2000

• Proceedings of the Korean Nuclear Society Conference
• /
• 2003.10a
• /
• pp.201.1-201.1
• /
• 2003

• Monthly Korean Chicken
• /
• v.3 no.11 s.29
• /
• pp.2-8
• /
• 1997

2004년까지 축산물위생수준 선진국수준으로 - 축기연, 생명과학관 준공으로 경쟁력 향상에 기여 - 축산 폐수처리 시행규칙 개정 - 닭 전염성 빈혈 조기 진단법 개발 - 타조 검역기간 오래 걸려 - 미육류검사, 기준강화 불구 소규모 도축장 관리 여려워 - 96년 닭고기 1인당 연간 소비량 11.2Kg - 중국, 미 가금육 수입금지 철회 - 세계 가금육 생산 및 소비 꾸준히 증가 추세 - 빠르게 성장하는 인도의 양계산업