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동일한 평면을 가진 전통목조건축물의 상시미동계측 기반 동적특성 비교 - 3간 팔작지붕 정자건축물을 대상으로 -
김원종(Kim, Won-Jong),신은미(Shin, Eun-Mi),하태욱(Ha, Tae-Uk),김형준(Kim, Hyung-Jun) 대한건축학회 2021 대한건축학회 학술발표대회 논문집 Vol.41 No.2
The purpose of this study is to confirm the dynamic properties of two traditional wooden buildings that are same-sized shape to each other through microtremor measurement. Microtremor measurement was performed each buildings in order to confirm modal natural frequency and mode shape and human excitation was also performed in order to confirm damping ratio.
Leadframe Feeder Heat Rail의 설계와 검증
김원종(Won-Jong Kim),황은하(Eun-Ha Hwang) 한국산업융합학회 2012 한국산업융합학회 논문집 Vol.15 No.1
Trends in semiconductor equipment industry are to reduce the cost of producing semiconductor, semiconductor process development, facility development, and the minimum investment in terms of cost and quality. Semiconductor equipments are being considered to review and development is proceeding at the same time. In the first part of the semiconductor assembly process, in which the importance of die bonding process is emerging, a wide leadframe type die bonding machine is demanded for productivity. Die bonding machine was designed through experiments and by trial and error. It costs a lot of time and financial burden. The purpose of this study is to solve these problems by using the CAE tool 3G. By using finite element method, thermal analysis of die bonding machine to the various widths leadframe die bonder machine rail is performed for design.
데이터 마이닝을 활용한 한국 프로야구 구단의 승패예측과 승률 향상을 위한 전략 도출 연구
김원종 ( Kim Won-jong ),최연식 ( Choi Yeon-sik ),유동희 ( Yoo Dong-hee ) 한국스포츠산업경영학회 2018 한국스포츠산업경영학회지 Vol.23 No.3
본 연구에서는 데이터 마이닝 기법을 활용하여 한국 프로야구의 승패예측모형을 구축하는 실험을 진행하였다. 이를 위해, 2017년에 실시된 한국 프로야구 10개 구단의 전체 경기 중 무승부 경기를 제외한 1,418경기에 대한 자료를 사용하였다. 승패예측모형에는 의사결정나무, 베이즈넷, 인공신경망 알고리즘과 앙상블 기법인 배깅과 부스팅이 사용되었으며, 그 결과 배깅 기법에 인공신경망을 적용한 예측모형에서 가장 높은 예측률인 85.18%를 기록하였다. 다음으로 의사결정나무 기반 예측모형을 활용하여 한국 프로야구 전체 구단에 관한 8개의 승패규칙을 도출하였다. 여기에서 승패규칙은 승패예측에 영향을 미치는 주요 요인들인 팀출루율, 팀타율, 피안타, 안타, 타석, 타수로 표현되며, 도출된 규칙을 바탕으로 구단의 승률 향상에 도움을 주는 전략을 제안하였다. 또한 플레이오프 진출 구단과 미진출 구단에 관한 승리규칙을 각각 4개씩 도출하였고 이를 바탕으로 두 집단에 맞춤화된 승률 향상 전략을 제시하였으며, 실제 구단에서 선수를 영입한 방향과의 비교를 통해 제시된 전략의 활용 가능성을 확인하였다. This study conducted an experiment to develop win-loss prediction models for the Korean professional baseball league using data mining techniques. To this end, we used data on 1,418 games from all games played by the ten Korean professional baseball teams in 2017, except draw games. We developed win-loss prediction models using not only a decision tree, Bayse net, and artificial neural network algorithms, but also ensemble methods, such as bagging and boosting. As a result, first, we found that the artificial neural network-based prediction model using the bagging method reported the best accuracy (85.18%). Second, we derived eight win-loss rules for entire teams from the decision tree-based prediction model. These rules consist of six influential factors: team on base average, team batting average, hit by opponent, hit, plate appearances, and at bat. Using the derived rules, we proposed helpful strategies for improving the winning rate. Third, we derived four winning rules for both playoff teams and non-playoff teams; using the rules we proposed customized strategies for improving the winning rate of the two different groups. Finally, we confirmed the feasibility of the proposed strategies by comparing non-playoff teams’ actual player recruitment strategies.
당의 종류에 따른 모시대 분말 첨가 현미다식의 품질 특성
김애정(Kim, Ae-Jung),정경희(Joung, Kyung-Hee),박원종(Park, Won-Jong) 한국산학기술학회 2010 한국산학기술학회논문지 Vol.11 No.11
본 연구는 모시대 분말을 첨가한 현미분말에 당의 종류를 달리하여 제조한 다식의 품질특성을 분석하였 다. 명도(L값)의 경우 대조군인 꿀 첨가군과 물엿 첨가군은 같은 값을 나타낸 반면 플락토올리고당 첨가군과 이소말 토올리고당 첨가군은 유사한 값을 보였다. 적색도(a값)의 경우는 플락토올리고당 첨가군과 이소말토올리고당 첨가군 은 대조군에 비해 유의적으로 낮은 값을 보였다. 황색도(b값)에 있어서도 플락토올리고당 첨가군과 이소말토올리고 당 첨가군은 대조군에 비해 유의적으로 높은 값을 나타내었다. 기계적 특성에서 탄성과 응집성은 유의적인 차이가 없었으나 경도, 검성, 씹힘성은 유의적인 차이가 있었다. 경도, 검성, 씹힘성은 BRSM과 BRIM보다 대조군이 낮게 나타났다. 관능평가 결과, 맛의 경우 꿀 첨가군, 플락토올리고당 첨가군은 비슷한 점수를 보였으나, 이소말토올리고 당 첨가군과 물엿 첨가군은 꿀이나 플락토올리고당 첨가군에 비해 유의적으로 낮은 점수를 나타내었다. 조직감은 다 른 첨가군에 비해 플락토올리고당 첨가군이 유의적으로 높은 값을 나타내었다. 전체적인 기호도의 경우 꿀 첨가군과 플락토올리고당 첨가군은 같은 값으로 이소말토올리고당과 물엿 첨가군에 비해 유의적으로 높은 점수 차이를 나타내었다. The principal objective of this study was to evaluate the physicochemical characteristics of scattered-flower ladybell powdered brown rice Dasik prepared with four kinds of sugars. We noted that the luminance of control sample was higher than that of BRSM and BRIM, but similar to BRFM sample. In Hunter's a of control were higher than those of BRFM and BRFM, but similar to BRSM sample. In Hunter's of b values were decreased. With regard to the mechanical properties of the Dasik samples, we noted significant differences in hardness, gumminess, chewiness but no differences in springiness and cohesiveness were detected. The hardness, gumminess, chewiness of control sample were lowered than those of BRSM and BRIM. The case of sensory evaluation, there were taste and texture of control sample were higher than those of BRSM and BRIM, but BRFM. And the overall quality of BRFM was significantly higher than those of BRSM and BRIM, but control sample.
Chip Bonding Machine Base 구조해석에 관한 연구
김원종(Won-Jong Kim),황은하(Eun-Ha Hwang) 한국산업융합학회 2012 한국산업융합학회 논문집 Vol.15 No.2
This study is concerned about the design and structural analysis of high integrated Chip Bonding Machine. Recently, many studies have been undergoing to reduce a working time in a field of Chip Bonding Machine. Chip Bonding Machine belongs to reduce a stand-by time by Chip Moving time. The developed system can save tool moving distance in small space than other machine. The analysis is carried out by SoldEdge & Ansys software.
김원종(Won-Jong Kim),이충석(Choong-Seok Lee),채승수(Seong-Su Chae),김택수(Teak-Su Kim),이상민(Sang-Min Lee),박휘근(Hwi-Keun Park),조성만(Sung-Man Jo),송덕재(Duck-Jae Song),이종찬(Jong-Chan Lee) 한국기계가공학회 2009 한국기계가공학회 춘추계학술대회 논문집 Vol.2009 No.6
A Structural analysis has been carried out for CNC Micro Center development. The main frame, turret base, and machine column have been modelled using Solid Edge Software and analyzed using ANSYS Program. The analytical results indicate that the designed CNC Micro Center is stable at 3000-3600 rpm of spindle, which is commonly used range of rpm in this machine. The structual deformation has been reduced from 74㎜ to 0.3㎛.
한중콘크리트 개선을 위한 철가루와 활성탄 혼입 경화체 기초연구
김원종 ( Kim Won-jong ),김원식 ( Kim Won-sik ),김규용 ( Kim Gyu-yong ),이상수 ( Lee Sang-soo ) 한국건축시공학회 2022 한국건축시공학회 학술발표대회 논문집 Vol.22 No.2
By studying the characteristics of matrix insulated through heat generated through oxidation of iron powder, the basic research results on the possibility of buffering and applicability of Cold weather concrete as a curing method are presented. In order to prevent freezing due to a sharp decrease in temperature in the initial stage of curing, iron powder (Fe), powder activated carbon, which is a small amount of porous carbonaceous adsorbent, and salt (NaCl) as an oxidizing agent are replaced with iron powder admixture. As the curing temperature increases, the strength tends to increase, and when replacing the admixture at the same curing temperature, the strength slightly decreases. This is determined as a result of generating iron oxide through an oxidation reaction of iron powder, activated carbon, and NaCl generating a large amount of pores in the matrix. In addition, the internal temperature tends to increase as the mixing substitution rate increases, and it is judged that the oxidation heat of the iron powder mixture affects the increase of the internal temperature during curing. The higher the replacement rate of the iron powder mixture, the slightly lower the strength, but it is determined that freezing and melting that may occur in the early stage of curing can be prevented due to an increase in the initial internal temperature.