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RISS 인기검색어
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- 저자 : 임대식(Dae Sik Lim) (검색결과 40 건)
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임대식(Dae-Sik Lim),김해준(Hae-Jun Kim),이동춘(Dong-Choon Lee) 전력전자학회 1999 전력전자학술대회 논문집 Vol.1999 No.7
This paper proposes a novel current control method of three-phase PWM rectifiers without phase current sensors. The features of this method are to reconstruct phase currents by using switching pattern of space vector modulation and to estlmate phase currents by a predictive state observer for practical applications. Simulation results show that the performance of the proposed system is nearly the same as that of sensor-based system.
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임대식(Dae Sik Lim),박용진(Young Jin Park),신동훈(Dong Hoon Shin),윤명희(Mung Hi Yoon),이충한(Chung Han Lee),박영훈(Young Hoon Park) 한국간담췌외과학회 2000 Annals of hepato-biliary-pancreatic surgery Vol.4 No.2
Background : Surgical resection is generally accepted as the first choice of treatment for primary hepatic malignancy. But liver resection of primary hepatic malignancy is associated with a high incidence of recurrence, that has a poor prognosis. The goal of this research was to assess the rationale and result of treatment of recurrence following resection of primary hepatic malignancy.Patients & Methods : This was a retrospective study of 258 patients who had done hepatic resection with primary hepatic malignancy from 1990. Jan to 1999. Dec. And retrospective analysis of 72 patients with recurrent intrahepatic malignancy after hepatic resection. We exclude extrahepatic recurrence. The treatment methods of intrahepatic recurrence are variable. They include repeated hepatic resection, transcatheter arterial chemoembolization, percutaneous injection therapy of alcohol or hot saline, holmium-166 injection therapy, systemic chemotherapy and combined therapy.Results : The cases of hepatic re-resection are 8, the cases of transcatheter arterial chemoembolization are 19 , the cases of percutaneous injection therapy of alcohol or hot saline are 7, the cases of holmium-166 injection therapy are 6, the cases of systemic chemotherapy are 13 and the cases of combined therapy are 13. In the poor general condition, 6 patients, only conservative therapy was applied. The survival rate of 72 patients with recurrent intrahepatic malignancy after hepatic resection is 61.6%, 46.6%, 33.5%, 26.9%, 15.5%, 2.7% at 3 month, 6 month, 9month, 1year, 2year, 3year. The survival rate of the cases of hepatic re-resection is 100%, 85.7%, 71.4%, 71.4%, 47.6%. The survival rate of transcatheter arterial chemoembolization is 89.5%, 73.0%, 61.8%, 61.8%, 44.1%. 11.0%. The survival rate of percutaneous injection therapy of alcohol or hot saline is 100%, 71.4%, 42.9%, 42.9%, 14.3%, 0%. The survival rate of holmium-166 injection therapy is 66.7%, 66.7%, 66.7%, 33.3%, 33.3%. The survival rate of systemic chemotherapy is 53.9%, 38.5%, 30.8%, 15.4%, 15.4%, 0%. The survival rate of combined therapy is 100%, 84.6%, 69.2%, 69.2%, 41.5%, 0%. And the survival rate of conservative therapy is 54.1%, 39.8%, 19.9%, 14.2%, 7.6%, 3.8%.Conclusion : We got results that the hepatic resection, holmium-166 injection therapy, and transcatheter arterial chemoembolization combined therapy were better than systemic chemotherapy and percutaneous injection therapy of alcohol or hot saline in longterm survival rate.
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LVDC 중간점 임피던스 접지방식의 임피던스 구성에 따른 지락고장 전류 분석
임대식(Dae-Sik Lim),이기연(Ki-Yeon Lee),김동우(Dong-Woo Kim),채동주(Dong-Ju Chae),임승택(Seung-Taek Lim),문재현(Jae-Hyeon Moon) 대한전기학회 2021 대한전기학회 학술대회 논문집 Vol.2021 No.5
직류 계통은 교류 계통에 비해 고효율, 고신뢰성, 변환 단계 수 저감, 낮은 전력 손실, 전력 품질 향상, 보다 쉬운 직류 분산 에너지 통합 등의 많은 이점이 있다. 직류 계통에서 사용 가능한 접지방식은 직류 계통의 설계, 운영 및 보호에 필수적이다. 본 논문에서는 접지방식으로 직류 2선식 전원계통에서 IT 인위적 중간점 접지방식 채택 시 전원 측접지임피던스의 구성에 따라 1차 지락고장별 사고전류 특성을 분석하고자 한다.
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