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이철원,임인칠,Lee, Chul-Won,Lim, In-Chil 대한전자공학회 1996 전자공학회논문지-B Vol.b33 No.1
본 논문에서는 이산 은닉 마코프 모델(Discrete Hidden Markov Model)을 이용한 연결 음성 인식에 관한 알고리듬 및 모델 토폴로지를 제안한다. 제안된 모델은 인식률과 인식할 수 있는 어휘를 고려하여 2 음소열 및 3 음소열 모델을 사용하며, 보다 정확한 음소 간의 세그멘테이션과 알고리듬의 수행 속도를 고려하여 2 음소열에서는 첫 번째 상태와 마지막 상태를 안정 상태, 나머지 상태는 천이 상태인 4 개의 상태를 갖도록 하고, 또한 3 음소열에서는 7 개의 상태를 갖도록 하며, 여기서 7개의 상태는 3 개의 안정 상태와 4개의 천이 상태를 갖도록 개선한다. 또한, 제안된 음성 인식 알고리듬은 인식 과정 내에서 음소의 발음 구간을 검출하도록 설계한다. This paper proposes an algorithm and a model topology for the connected speech recognition using Discrete Hidden Markov Models. A proposed model uses diphone and triphone model which consider the recognition rate and recognisable vocabulary. Considering more exact inter- phoneme segmentation and execution speed of algorithm, 4 states have to exist in diphone model where the first state and the last state are keeping a steady state, the other states hold a transient state. 7 states have to exist in triphone model where 7 states are specified and improved to 3 steady states and 4 transition states. Also, the proposed speech recognition algorithm is designed to detect the inter-phoneme segmentation during the recognition processing.
Python을 이용한 냉동기 에너지소비량 예측 모델의 성능 개선 및 비교 평가
이철원(Lee, Cheol-Won),성남철(Seong, Nam-Chul),최원창(Choi, Won-Chang) 한국건축친환경설비학회 2021 한국건축친환경설비학회 논문집 Vol.15 No.3
In this study, Python is used to predict chiller energy consumption and improve the performance of forecasting models. The forecasting model used a random forest model and an artificial neural network model. To improve the performance of the forecasting model, the accuracy was evaluated by adjusting the number of inputs and the training data size. As a result, for the random forest model, the prediction performance allowed by the criteria was shown from the number of input variables to seven, and the CvRMSE improved the prediction performance by up to 23.91% by increasing the number of inputs. The training data size was shown to have acceptable predictive performance for the criterion at 80% and increased the training data size, improving the predictive performance by up to 14.08%. For artificial neural network (ANN) models, the predictive performance allowed by the criterion was shown to have a predictive performance with four inputs, and the CvRMSE improved by up to 14.90% by increasing the number of inputs. The training data size was shown to have acceptable predictive performance for the criterion at 70% and the maximum increase in the training data size resulted in improved predictive performance by up to 11.99% for CvRMSE. Comparing the two models, the artificial neural network model has better predictive performance than the random forest model, and the model for improving predictive performance is also more advantageous for the use of input variables and the adjustment of training data size.
이철원(Chul Won Lee) 한국여가레크리에이션학회 2008 한국여가레크리에이션학회지 Vol.32 No.2
This study was to explore a theoretical modeling for serious leisure of running mania by using grounded theory. External stimulus as context and entering into running as casual condition made it possible to get flow toward running experience. However, constraints of running as intervening conditions were also interacted and gave bad impacts to runners. Goal and training system, enduring desire for challenge and reconstruction of `running body` as interaction played a great role in reinforcing serious running experience for running mania. This became a consequence. This study was the first trial to suggest a whole process from running motivation to serious running experience in the realm of Leisure Studies.
주 5일 근무제 이후 도시민의 여가 향유 형태와 발전 방향에 관한 담론
이철원(Chul Won Lee) 한국여가레크리에이션학회 2007 한국여가레크리에이션학회지 Vol.31 No.1
This study was to explore the leisure participation patterns and leisure problems in the lives of urban workers since a five-day work week has involved. It was explained as follows. Firstly, Several leisure tendancies were manifested in Korean society. Money consumption in the leisure participation became more important in participation after five-day work week. Digital environment effect in the leisure participation is increasing more. Concept of leisure changed more actively, and tendency of leisure is appearing strongly private style called as privatization. Secondly, some problems have been appeared after the five-day work week. The estrangement by economic and age differences has deepened more. Skill absence of leisure participation makes it possible to suffer the syndrome that leisure induces urban workers sickness such as fear and discord in leisure involvement. Finally, public and personal preparations are needed to solve current problems. In this respect, for example, leisure support center as a provisional name should build up, and leisure education program will fulfil extensively. In an addition, the reform of consciousness of urban dweller must be changed.
중년 남성의 여가 정책 수립 및 적용에 대한 근거이론적 분석
이철원(Chul Won Lee) 한국여가레크리에이션학회 2015 한국여가레크리에이션학회지 Vol.39 No.3
The purpose of this study was to understand the general situations for the effective policy implementation related to reducing leisure constraints and enhancing life satisfaction of middle-aged men at the time of enforcement for the ‘Basic Law of Leisure’(Yeogagibonbeop). This study was performed to understand the conditions to be successful leisure policy for middle-aged men due to the implementation of ‘the Basic Law of Leisure’ to the personal realm by central government and local government’s interventions. Total six leisure Policy experts were participated, and data were collected and analyzed by in-depth interview through the grounded theory among the qualitative research methods. 115 concepts, 13 sub-categories, and 6 categories were derived for ‘open coding’, ‘axial coding’, and ‘selective coding’. According to categorization, main phenomenon as ‘enforcing leisure policy for middle-aged men’ is affected by the leisure constraints of middle-aged men(causal conditions) and the current domestic leisure situation(situational context). The endemic social problems in leisure participation(intervening condition) gets in the way in leisure policy enforcement. However, success and failure of leisure policy for middle-aged men depends on the efforts of local governments(action/ interaction strategies). At this point of implementing the Basic Law of Leisure, this study suggests that politic efforts of community and local government are considerably important.
이철원(Chul Won Lee),송병주(Byung Joo Song),변지용(Ji Yong Byun) 한국여가레크리에이션학회 2008 한국여가레크리에이션학회지 Vol.32 No.1
The purpose of this study is to analyze the phenomenon of scuba divers who visit a specific diving point as a leisure activity in terms of the concept of place attachment. Study on the place attachment has not been so popular in Korean Leisure studies so that in this study, the method of phenomenological approach had been used due to lack of literature reviews. Total five research informants had been chosen as the participants and we used the method of in-depth interview, participating observation and field note. Collected data was in process of coding, conceptualization and categorization for data analysis. Also to test the validity and credibility, the study had been tested by the method of peer de-briefing and members check. The results are as follows: Firstly, the participants would like to prefer the great atmosphere under the sea. Secondly, massive rock bed made by volcanic action is an attractive factor for research informants. Thirdly, they would enjoy the diving with safety. Lastly, they prefer the legally allowed for catching under water creatures such as shells and sea cucumber.