한국어와 일본어의 음성 인식을 위한 알고리즘 개발에 관한 연구

이성화,김병래,Lee, Sung-Hwa,Kim, Hyung-Lae 한국전기전자학회 1998 전기전자학회논문지 Vol.2 No.1

In this thesis, experiment have performed with the speaker recognition using multilayer feedforward neural network(MFNN) model using Korean and Japanese digits . The 5 adult males and 5 adult females pronounciate form 0 to 9 digits of Korean, Japanese 7 times. And then, they are extracted characteristics coefficient through Pitch deletion algorithm, LPC analysis, and LPC Cepstral analysis to generate input pattern of MFNN. 5 times among them are used to train a neural network, and 2 times is used to measure the performance of neural network. Both Korean and Japanese, Pitch coefficients is about 4%t more enhanced than LPC or LPC Cepstral coefficients.

건강한 실내공기를 위한 냄새관리 - 실내환경 대응 냄새 제거 기술

이성화,Lee, Seong-Hwa 한국공기청정협회 2016 空氣淸淨技術 Vol.29 No.3

황사 대응 공기청정 기술

이성화,Lee Sung-Hwa 대한설비공학회 2006 설비저널 Vol.35 No.4

공기청정기 실증 사례 분석 - 실내 알레르겐 특성과 공기청정기의 알레르겐 제거 및 비염 환자의 효과

이성화,박중원,Lee, Seong-Hwa,Park, Jung-Won 한국공기청정협회 2018 空氣淸淨技術 Vol.31 No.3

비대상성 간경변증 환자의 예후지표로서 Model for End-stage Liver Disease와 간정맥압차의 비교

이성화 ( Sung Hoa Lee ),박승하 ( Seung Ha Park ),김고운 ( Go Woon Kim ),이우진 ( Woo Jin Lee ),홍원기 ( Won Ki Hong ),류명신 ( Myeong Shin Ryu ),박규태 ( Kyu Tae Park ),이민영 ( Min Young Lee ),이찬우 ( Chan Woo Lee ),김진호 ( Jin 대한간학회 2009 Clinical and Molecular Hepatology(대한간학회지) Vol.15 No.3

목적: 비대상성 간경변증 환자에서 3개월과 12개월 시점의 간정맥압차와 MELD의 사망예측 정확도를 비교하여, HVPG의 예후인자로서의 역할을 확인하고자 하였다. 대상과 방법: 2006년 1월부터 2008년 6월까지 한림대학교부속 춘천성심병원에서 136명의 비대상성 간경변증 환자를 대상으로 HVPG를 측정하였다. 생존분석의 1차 결과 변수로서 3개월과 12개월에서의 사망 여부를 확인하였다. 결과: Cox 회귀분석 결과, MELD와 HVPG 모두 독립적인 예후인자로 확인되었다[각각 hazard ratio는 1.11(95% CI, 1.04 to 1.20)과 1.12(95% CI, 1.08 to 1.16)]. 두 변수의 ROC곡선의 AUC를 비교해 볼 때, 3개월에서 유의하진 않지만 MELD는 HVPG보다 사망예측에 있어서 정확도가 8% 정도 더 높게 보였다[0.76(95% CI, 0.62 to 0.89) 대 0.68(95% CI, 0.52 to 0.84), P=0.22]. 12개월에서는 MELD와 HVPG 모두 비슷한 사망예측의 정확도를 보였다[0.72(95% CI, 0.61 to 0.83) 대 0.73 (95% CI, 0.61 to 0.84), P=0.45,]. 결론: MELD와 HVPG는 비대상성 간경변증 환자에서 사망과 관련된 독립적인 예후인자로서 사망예측의 정확도에 있어서 유의한 차이를 보이지 않는다. 하지만 HVPG는 침습적이고 소수의 의료기관에서만 시행된다는 점에서 사망예측인자로서 HVPG의 역할은 제한적이라 판단된다. 그러나 HVPG의 다양한 예후인자로서의 임상적 역할을 규정하기 위해서는 폭넓은 환자군(원인, 성별, 지역, 등)을 대상으로 하는 전향연구가 필요하다. Backgrounds/Aims: This study compared the prognostic values of the Model for End-stage Liver Disease (MELD) and the hepatic venous pressure gradient (HVPG) in the prediction of death within 3 and 12 months in patients with decompensated liver cirrhosis. Methods: We used data from 136 consecutive patients with decompensated cirrhosis who underwent HVPG between January 2006 and June 2008. Cox regression analysis was used to investigate the independent relationships with death of MELD and HVPG. The prognostic accuracies of MELD and HVPG were analyzed by calculating the area under the receiver operating characteristic curve (AUROC) for the occurrence of death within 3 and 12 months. Results: Both MELD and HVPG were independent predictors of death [hazard ratio (HR)=1.11 and 1.12, respectively; 95% confidence interval (CI)=1.04~1.20 and 1.08-1.16]. Analysis of the AUROC demonstrated that the prognostic power did not differ between MELD and HVPG for predicting the 3-month survival (HR=0.76 and 0.68, respectively; 95% CI=0.62~0.89 and 0.52~0.84; P=0.22) or the 12-month survival (HR=0.72 and 0.73, 95% CI=0.61~0.83 and CI=0.61~0.84). Conclusions: Both MELD and HVPG are independent prognostic factors of death within 3 and 12 months in patients with decompensated liver cirrhosis, and their accuracies are similar. However, HVPG has a limited role in the prediction of death in decompensated cirrhosis due to its invasiveness and limited use. (Korean J Hepatol 2009;15:350-356)

종방향 차량모델을 이용한 하이브리드 휠로더의 연비 개선효과에 관한 연구

이성화(Sunghwa Lee),박태호(Taeho Park),진기창(Kichang Jin),이형철(Hyeongcheol Lee),권영민(YoungMin Kwon),이종찬(Jongchan Lee) 한국자동차공학회 2010 한국자동차공학회 학술대회 및 전시회 Vol.2010 No.11

This paper proposes the configuration of parallel hybrid wheel loader and power control algorithm. The target vehicle is composed of engine, battery, motor, torque converter, transmission, vhehicle, and wheel. The main control strategy of the target vehicle is to optimally distribute demanded power from the power sources by considering highest efficiency point of the engine and motor. Furthermore, when there is no engine load, the idle stop technology is applied. A hybrid wheel loader model and the proposed algorithm are developed by unsin AMEsim, verified through the simulation, and compared with the results of conventional wheel loader. Simulation results show fuel reduction and narrow swing of SOC, and thus demonstrate the feasibility and effectiveness of the proposed algorithm.

지적불부합지가 토지이용에 미치는 영향과 해소방안에 관한 연구

이성화(Seong Hwa Lee) 한국부동산분석학회 2001 부동산학연구 Vol.7 No.2

In Korean Cadastral System, cadastral non-coincidence lands which have been generated by original, systematic, technical and operational problems of it have anenormous negative impact on Korean society, public administration and economy. In order to solve the problems of cadastral non-coincidence lands, it is most desirable to change current cadastral system by cadastral re-survey project. However, some alternatives which can be applied will be suggested as follows. Firstly, because it is very difficult to treat cadastral non-coincidence lands with the current cadastral laws, cadastre-related laws and regulations have to be reviewed and enacted to deal with them easily. Secondly, cadastral surveying in the geographic cadastral areas inevitably generates instrument and personal errors caused by plane surveying method. So, it should be replaced with an upgraded method such as theodolite surveying method. Thirdly, scale changing project, that is geographical cadastre into numerical cadastre, should be performed so that creation of non-coincidence cadastral lands can be prevented. First of all, this requires arrangement of surveying control points as well as complementing related laws according to scale changing project. Therefore, it is suggested that the dual system of control points has to be unified into the system of national control points by cooperation among relevant departments as soon as possible.

정체성의 정치

이성화(LEE, SEONG-HWA) 한국동양정치사상사학회 2003 한국동양정치사상사연구 Vol.2 No.1

근거리 단일 물체 인지를 위한 UWB 레이더 및 Range Doppler 알고리즘 기반의 SAR 구현

이성화(Sunghwa Lee),서지원(Jiwon Seo) 대한전자공학회 2016 대한전자공학회 학술대회 Vol.2016 No.6

부동산개발을 저해하는 지적불부합지의 실태분석에 관한 연구

이성화 ( Seong Hwa Lee ) 한국부동산분석학회 2002 부동산학연구 Vol.8 No.1

The current cadastral system which had been established by Land·Forest Investigation Projects performed from 1910 to 1924 have been maintained in a graphical manners. The areas of cadastral discrepancy scattered all over the country resulted from the limitation of graphical cadastral maps and the central government and municipalities have made great efforts to cope with these problems. The result of a cadastral discrepancy investigation shows that 1 per cent of the gross area of the country is founded as discrepant and the problem areas in urban regions are five times larger than those in rural. However, the investigation could not be performed over the whole territory. Although it is very difficult to simultaneously adjust the whole discrepant sites, the necessity emerged for protecting property rights and establishing National Geographic Information Project being thrusted as a essential national-level project. The resolution methodologies of the cadastral discrepancy have to contain firstly, set up of systematic driving strategy such as financing, solution for parcel area variation, foundation of organization in charge, secondly, guidance of municipalities to commence the adjustment projects by themselves with diverse methods, and lastly, the projects should be drived in the legal framework of Special Act for Adjustment of Cadastral Discrepancy(tentative name). Before the enactment, the resolution of the cadastral discrepancy should be propelled with revision and improvement of cadastral laws and regulations through the successful adjustment cases in municipalities.