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이재규,오상봉,신중철 한국경영과학회 1989 한국경영과학회 학술대회논문집 Vol.- No.1
To overcome the limitation of time series models which can not incorporate unexpected future events and other qualitative factors, a knowledge-assisted adjustment of statistical forecasts is proposed and a prototype UNIK-FCST is being developed. This paper presents five types of judgmental factors and proposes schemes to identify and evaluate the impacts of historical events by regression and analogy, case-based reasoning based on limited similar cases, and non-monotonic reasoning for the management of multiple judgmental factors. The UNIK-FCST is applied to the demand forecasting of oil products.
이재규,최정훈,이상봉,이인창,배상도 대한신경외과학회 1993 Journal of Korean neurosurgical society Vol.22 No.4
367 patients with hypertensive intracranial hemorrhage, admitted to Masan Koryo neurosurgical department from Jan. 1988 to Dec. 1991, have been clinically analyzed. The results were as follows : 1) The group consisted of 176 males and 191 females. The peak age of the patients was at their 6th decade. Seasonal distribution of the incidence was peaked at spring and autumn. 2) 51.0% of these hemorrhage was located in putamen, 19.9% in thalamus, 12.5% in subcortex, 8.7% in cerebellum and 7.9% in brain stem. Patients with brain stem hemorrhage showed relatively poor prognosis compared with subcortex or cerebellar hemorrhage. 3) The level of consciousness at admission has significant relation to prognosis especially in non-operative group. 4) 130 patients underwent surgical treatment. In delayed operation group which was performed after at least 3 days from attack, good prognosis was obtained. 5) In 146 patients(39.8%), IVH was accompanied, which lead to poor prognosis. Especially in patients with thalamic hemorrhage, the incidence of IVH reached to 71.2%. 6) Overall outcome of 367 patients was good in 40.9%, and poor in 25.9%. Total motality rate was 33.2%.
이재규 대한응급의학회 1999 대한응급의학회지 Vol.10 No.4
To select high risk group in middle cerebral artery(MCA) infarction by comparing and analysing 10 risk factors in above patients, we analyzed 32 MCA infarcted patients and 30 case control groups retrospectively. Through the analysis of 10 risk factors(age, heart disease, blood pressure, total cholesterol, triglyceride, HDL-cholesterol, glucose, smoking, r-GTP, past history : hypertension or cerebrovascular accident) in MCA infarction by the times patients arrieves in emergency room by scoring system made by author, MCA infarcted patients showed score about 1.4 in 24 cases(75.00%) among 32 MCA infarction patients, and in control group, score below 1.4 showed in 28 cases(93.33%) among 30 cases By the scoring system made by author, the higher risk grouped patients could identified more easily in emergency department.
병행 2회선 송전선로에서 고장점 위치 추정정보를 이용한 실시간 거리 계전 알로리즘
이재규,유석구 대한전기학회 2003 전기학회논문지A Vol.52 No.3
- This paper presents the real-time implemented distance relay algorithm which the fault distance is estimated with only local terminal information. When a single-phase-to-earth fault on a two-parallel transmission line occurs, the reach accuracy of distance relay is considerably affected by the unknown variables which are fault resistance, fault current at the fault point and zero-sequence current of sound line. The zero-sequence current of sound line is estimated by using the zero sequence voltage which is measured by relaying location. Also, the fault resistance is removed at the process of numerical formula expansion. Lastly, the fault current through a fault point is expressed as a function of the zero-sequence current of fault line, zero-sequence current of sound line, and fault distance. Therefore, the fault phase voltage can be expressed as the quadratic equation of the fault distance. The solution of this quadratic equation is obtained by using a coefficient of the modified quadratic equation instead of using the square root solution method. After the accurate fault distance is estimated, the more accurate impedance is measured by using such an information.