http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : 최남수(Nam-Su Choi) (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
-
-
김재필(Jae Pill Kim),최남수(Nam Su Choi),임성식(Sung Shick Lim),이상억(Sang Eog Lee),홍화정(Hwa Jung Hong),홍성표(Seong Pyo Hong),이태원(Tae Won Lee),임천규(Chun Gyoo Ihm),김명재(Myung Jae Kim),박원도(Won Do Park),김영훈(Yeong Hoon K 대한내과학회 1997 대한내과학회지 Vol.52 No.5
N/A Objective: Acute Renal Failure is a clinical syndrome characterized by a sudden decrease in renal function which was previously normal. Despite advances in medical care, prognosis in ARF is variable according to the influence of demographic factors, severity of ARF, nature of disease causing ARF, coexisting disease, treatments applied, and complications. We studied the recent changes of clinical feature of ARF. Mcthods: We studied retrospectively 245 patients with ARF who had been hospitalized at Kyung Hee University Hospital between February 1988 and March 1993. Results: 1) Male to female sex ratio was 1.8:1, and the incidence was high in above fifth decade (67.8%). 2) Acute renal failure was classified, according to clinical background, into medical group 79.6% (195 cases) and surgical group 20.4% (50 cases), and oliguric group 40.8% (100 cases) and non-oliguric group 59.2% (145 cases). 3) Acute renal failure due to medical causes included ARF by hemorrhagic fever with renal syndrome (25.6%), drugs and chemicals (17.9%), sepsis (17.4%) and systemic infection (7.7%) etc. ARF due to surgical causes included ARF by multiple trauma (34%), various surgical procedures (30%), surgical sepsis (14%), burn (12%) etc. 4) During admission, the expired patients had more severe biochemical and clinical characteristics including high BUN and serum potassium (p<0.01), lower serum albumin (p<0,01) than those of survivor. 5) Infections as the cause of ARF were 107 cases (43.7%), which included hemorrhagic fever with renal syndrome 50 cases, sepsis 31 cases, urinary tract infection 7 cases and respiratory tract infection 6 cases etc. The most common infecting organism was Hantavizus (50.5%). There was a greater number of gram-negative organisms than gram-positive organisms (34.1% vs 9.9%). 6) The overall mortality rate in patients with ARF was 31.4Fo. The presumptive causes of death were underlying disease (59.7%) such as sepsis, acute poisoning, cardiogenic and hypovolemic shock, and respiratory failure (14.3%), hyperkalemia (9.1%), pulmonary edeme (6.5%), and metabolic aidosis (2.6%) in order of frequency. 7) The highest mortality rate was 42.6% in patients above 50 years old. Mortality rate in patients with ARF due to surgical causes (52.0%) was significantly high than that of medical causes (26.2%) (p<0.05). Among the expired patients, oliguric group was 72.7%. In conclusion, there have been major trends in the clinical features of acute renal failure in this study. Especially, significant increase in the number of elderly patients, non-oliguric patients, and medical causes such as hemarrhagic fever with renal syndrome or sepsis were observed. Survival rate significantly decreased with increasing age, in acute renal failure by surgical causes, in oligurie patients, and in the presence of complicating factors such as sepsis or shock.
-
李金源,崔南洙 관동대학교 1996 關大論文集 Vol.24 No.1
In this paper, self-tuning controller is designed, so that Hoo norm of the difference between the desired transfer function and the actual closed loop transfer function is minimized. For solving this problem. Nevanlinna-Pick interpolation method is introduced and 1-step ahead predictor is also utilized for the realizable controller design. A 2nd order system is used for simulation. The effect of the noise to the system output is shown to the rejected in simulation.
-
崔南洙,李金源 관동대학교 1995 關大論文集 Vol.23 No.1
In this paper, unknown system is controlled by H infinity controller which is studied recently and is designed on the basis of minimizing H infinity norm of transfer function between input and error output . The H infinity technique is one of the robust control which has been continuously studied since 1960s. Two methods are suggested. One is using output feedback or state feedback and the other is using structured singular value. By computer simulation , the first is by using 1 or 2 Riccati equation solutions and latter is done by using μ synthesis , and then the usefulness of the algorithms is proven.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
