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 : 정기호 ( Man Ki Lee (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
-
부가가치율 정보를 활용한 산업연관모형 투입계수의 예측 방법
정기호(Kiho Jeong),이만기(Man Ki Lee) 한국계량경제학회 2004 계량경제학보 Vol.15 No.3
산업연관모형을 이용한 분석에서 투입계수의 예측은 주로 단순 RAS 및 변형된 RAS의 접근법을 활용하고 있다. 동 접근방법의 예측과정은 2단계로 구성된다. 1단계에서는 기준연도와 비교연도의 정보를 이용하여 비교연도의 투입계수행렬을 추정하고, 2단계에서는 추정과정에서 도출되는 R행렬과 S행렬을 이용하여 비교연도의 투입계수행렬 추정결과를 비례적으로 연장(extrapolatiorl)함으로써 새로운 예측연도의 투입계수행렬을 예측한다. 일단 투입계수행렬이 예측되면, 부가가치율의 예측은 투입계수행렬의 예측결과를 열방향으로 합산하여 1로부터 뺌으로써 부차적으로 이루어지게 된다. 이러한 접근방법은 두 가지 문제가 있다. 첫째는, 시간에 걸친 부가가치율의 변화가 투입계수보다 더 안정적이어서 투입계수보다는 부가가치율의 예측이 더 용이하다는 점이다. 따라서 부가가치율을 먼저 예측하고 그 결과를 활용하여 투입계수행렬을 예측하는 예측과정이 더 합리적일 것이다. 둘째는, 기존의 접근 방법은 새로운 예측연도의 부가가치율에 관한 정보가 있더라도 투입계수행렬의 예측단계에서 이러한 정보를 활용할 수 없다는 점이다. 본 연구는, 투입계수행렬의 예측 단계에서 연구자가 예측연도 부가가치율에 대한 값이나 예측치를 갖고 있을 때 이러한 사전 정보를 활용하여 투입계수행렬을 예측할 수 있는 방법을 제시한다. Input-output models usually predict input coefficients using a simple RAS or modified versions of RAS. The prediction process consists of two steps. The 1st step estimates input coefficients matrix of a target year using information of a base year and a target year. The 2nd step predicts input coefficients matrix of a new future year by extrapolating the target year matrix with help of R and S matrices which are derived in the 1st step. After input coefficients being predicted, value-added ratio is predicted by subtracting the column sums of input coefficients matrix from one. This prediction approach has two problems. One is that value-added ratio moves more smoothly over time than input coefficients, so the first is easier in prediction than the last. Another problem is that though information of value-added ratio for the new future year available, researchers do not have any method to utilize the information in the existing approach. This research suggests a new prediction method which can utilize the information if actual or predicted values of value-added ratio for the future year are avaliable.
-
-
-
이재호(Jae Ho Lee),최동철(Dong Chul Choi),송재훈(Jae Hoon Song),정기석(Ki Suck Jung),김영환(Young Whan Kim),한성구(Sung Koo Han),심영수(Young Soo Shim),김건열(Keun Youl Kim),한용철(Yong Chol Han),정기호(Ki Ho Jeong),정만표(Man Pyo Je 대한내과학회 1991 대한내과학회지 Vol.40 No.4
N/A A clinical evaluation was made in 14 cases of sleepapnea syndrome diagnosed by polysomnography in the Department of Internal Medicine, Seoul National University Hospital during the period from August, 1989 to April, 1990. The results obtained were as follow : 1) The ratio of male to female was 6:1. The age of peak incidence was 6th decade in 35.7%, and 5th decade in 28.6%, 7th and 4th decade in 14.3% respectively in order. 2) The most frequent nocturnal symptom was snoring observed in 14 cases (100%) and apnea during sleep noticed by sleep partner in 13 cases (92.9%). Of daytime symptoms, the most frequent one was daytime sleepiness which was observed in 13 cases (92.9%) followed by morning headache, 6 cases (42.9%). 3) On gross examination, characteristic features of thick, dull appearance with mouth open and plethora on cheek was found only in 5 cases (35.7%). Overweight was observed in 8 cases (57.2%). 4) Hypertension was accompanied in 7 cases (50%) and angina in 2 cases (14.3%). Hypothyroidism and chronic obstructive lung disease were observed in 1 case respectively. 5) 13 cases (92.9%) was obstructive sleep-apnea and 1 case(7.1%) was mixed type but none was central type. 6) On throat examination, palatine tonsilar hypertrophy was found in 10 cases (71.4%), redundant pharyngeal mucosa or redundant soft palate respectively in 6 cases (42.9%). 7) On polysomnographic examination, apnea index of 5~10 and 31~40 were most frequent (4 cases respectively; 28.6%) and apnea index of 41~50 was 3 cases(21.4%). 8) The longest apnea duration of 41~50 seconds was most frequent (4 cases; 28.6%) and apnea duration of 61~70 seconds was next with 3 cases (21.4%). 9) The minimum arerial oxygen saturation of SO~89% was most frequent (7 cases; 50%) and arterial oxygen saturation of 70~79% and 40~49% was 2 cases respectively.
KCI
스콜라연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
