저탄장에서의 자연발화 현상에 대한 데이터 기반 예측기법 연구

목차 (Table of Contents)

• 그림차례·······························iv
• 표차례·······························viii
• 약기호표·······························ix
• 국문요약······························xii
• 제1장 서론······························ 1
• 1.1 연구배경 및 목적························ 1
• 1.2 선행연구···························· 3
• 제2장 이론적 배경················ ··········5
• 2.1 석탄의 자연발화·························5
• 2.1.1 석탄의 반응성·························8
• 2.1.2 석탄 입자내 기공의 크기···················10
• 2.1.3 공극률····························12
• 2.1.4 바람·····························13
• 2.1.5 저탄장의 높이························15
• 2.1.6 저탄장의 경사························16
• 2.2 전산유체역학 해석························17
• 2.3 데이터 기반 학습························23
• 2.3.1 선형회귀모델(Linear regression model) ············27
• 2.3.2 의사결정나무 및 랜덤포레스트·················29
• 2.3.3 딥러닝 모델(Deep Neural Network)···············31
• 2.3.4 하이퍼파라미터························33
• 2.3.5 과대적합 방지 기법······················38
• 2.3.6 데이터 기반 예측 모델 검증··················41
• 제3장 계산 방법···························42
• 3.1 전산유체역학 해석·······················42
• 3.1.1 지배방정식··························42
• 3.1.2 계산 영역··························47
• 3.1.3 계산 방법··························51
• 3.2 데이터 기반 해석························58
• 3.2.1 전처리 방법·························58
• 3.2.2 데이터 기반 모델링······················60
• 3.2.3 훈련과 검증(training and evaluation) 방법··········61
• 3.2.4 오차 해석 방법························62
• 제4장 계산 결과· ··························63
• 4.1 CFD 계산 비교··························63
• 4.2 데이터 기반 예측기법 비교···· ···············72
• 4.3 저탄장 수력학적 특성에 대한 전산해석···· ··········79
• 4.4 저탄장 자연발화 연소장 특성에 대한 전산해석 ··········81
• 4.5 저탄장 자연발화에 대한 데이터 기반 예측·············85
• 4.6 CFD 및 데이터 기반 예측 모델 계산시간 비교···········103
• 제5장 결론· ····························105
• 참고문헌······························108
• 영문요약······························113