• 전기의세계
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• 제22권2호
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• pp.51-56
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• 1973

The comparative study of maximum likelihood estimation with Bayesian approach was made by statistical & computational methods in center of a priori information of static systems and the effect of a priori information on the accuracy of the estimatiion was also analyzed. Through the numerical computations of some examples by digital computer, we concluded that maximum likelihood method is better than Bayesian estimation except for almost certain a priori informations. The study may therefore contribute in identification problems of dynamical systems connected with a priori informations.

• 품질경영학회지
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• 제29권4호
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• pp.82-91
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• 2001

Taguchi robust design is widely used to quality improve methods. Especially, interest of dynamic characteristics parameter design is getting grow. In this paper, we have a comparative analyzed three Signal-to-Noise Ratios which are used in American Supplier Institute(ASI), MINITAB and Taguchi series published by Japanese Standard Institute with numerical examples.

• 대한약학회:학술대회논문집
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• 대한약학회 2003년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.1
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• pp.250.1-250.1
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• 2003

In this work, we have conducted 3D-QSAR studies on a series of acanthonic acid derivatives that act as COX-2 inhibitors, using two different methods: comparative molecular field analysis (CoMFA) and comparative molecular similarity indices analysis (CoMSIA). CoMFA and CoMSIA analysis of twenty five pimarane analogues produced good models with high predictive abilities. (omitted)

• 한국원자력학회:학술대회논문집
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• 한국원자력학회 1995년도 추계학술발표회논문집(1)
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• pp.333-338
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• 1995

This paper discusses the methods for building up the empirical CHF correlation, Direct Substitution Method (DSM) and Heat Balance Method (HBM). It also includes consideration on the CHF manin, which ran be expressed differently depending on the correlation types in use. Some findings an presented with exemplary calculation.

• 오토저널
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• 제4권2호
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• pp.79-85
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• 1982

Computer codes on two numerical optimization methods-Sequentially Unconstrained Minimization Technique (SUMT) and Gradient Projection Method-are constructed and tested with several test problems. Design formulation of tension - compression coil spring is set up and the solution is obtained. Consequently, the feature, the advantage and the limitation of these methods, made clear through the tests, are discussed.

• Journal of the Korean Data and Information Science Society
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• 제26권3호
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• pp.611-618
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• 2015

오늘날 정보 기술과 소셜미디어의 확산으로 인하여 빅 데이터에 관심이 집중되고 있다. 이를 처리하기 위한 기술 중의 하나가 데이터마이닝기법인데, 이들 중에는 연관성 규칙이 많이 활용되고 있다. 연관성 규칙은 방향에 따라 양, 음, 그리고 역의 연관성 규칙 등이 존재하며, 평가 기준을 설정하고자 하는 경우에는 이들 세 가지 연관성 규칙을 동시에 고려하는 것이 바람직하다고 할 수 있다. 이를 위해 본 논문에서는 의학진단분야에서 활용되고 있는 진단도구들 중에서 민감도, 특이도, 위양성도, 그리고 위음성도를 고려한 균형비교신뢰도를 제안하고자 한다. 또한 흥미도 측도가 가져야 할 조건들을 점검한 후, 예제를 통하여 측도의 유용성을 고찰하였다. 그 결과, 균형비교신뢰도는 비교신뢰도와 역의 비교신뢰도가 양의 값을 가지는 경우에는 양의 값을 가지며, 이들 두 값이 음인 경우에는 음으로 나타났다. 따라서 연관성 규칙의 평가 기준 관점에서 볼 때 비교신뢰도와 역의 비교신뢰도를 개별적으로 이용하기 보다는 균형비교신뢰도를 활용하는 것이 더 바람직하다고 할 수 있다.

• 비교교육연구
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• 제28권1호
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• pp.153-173
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• 2018

이 연구의 목적은 교육정책 탐구에 있어서 비교교육연구접근이 활용되는 영역과 내용, 방법 등의 분석을 통하여 합리적인 교육정책 개발과 집행을 위해 비교교육(학)연구 접근의 유용성을 규명하는 데 있다. 본 논문에서 제시한 교육정책(학)연구의 개념구조의 요소들, 즉 교육정책이념, 교육정책과정과 분석, 교육정책내용과 환경을 한국비교교육학회에서 학술지로서 발간하고 있는 '비교교육연구'의 내용 분석틀로 사용하였다. 분석결과, '비교교육연구'(1971년부터 2017년 9월)에 게재된 총 748편의 논문 중 교육정책(학)연구 관련 논문은 157편(21.1%)인 것으로 나타났다. 교육정책연구 관련 전체 논문 182편(내용 중복 25편) 중에서, 교육정책이념 1편(0.54%), 교육정책과정 40편(21.98%), 교육정책분석 7편(3.85%), 교육정책내용(교육개혁 제외) 60편 (32.97%), 교육개혁 51편(28.02%), 그리고 교육정책환경과 관련한 연구 23편 (12.64%)으로 나타났다. 또한, 교육정책과정에 관한 연구 논문 40편을 분석한 결과 교육정책집행에 관한 논문이 가장 많은 것(24편, 60%)으로 나타났다. 교육개혁에 관한 논문을 제외한 교육정책내용으로 분류된 60편 연구논문 중 정책유형의 분석한 결과 국제 비교연구의 특성상 배분정책(27편, 45.0%)과 재분배정책(23편 33.3%)이 주종을 이루고 있음을 알 수 있다. 본 연구에서 비교교육(학)연구 접근을 통해 분석된 주요 교육정책에 관한 연구 혹은 정책 집행에 대한 연구결과들은 궁극적으로 비교교육학의 학문적 측면에서 비교교육연구 방법과 절차의 타당성, 정교성을 개발시키고, 또한 실제 합리적인 교육정책 개발과 집행에 유용한 시사점을 제공하게 될 것이다.

• 한방비만학회지
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• 제16권1호
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• pp.50-63
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• 2016

Objectives: The aim of this study is to analyze methods and outcomes about fasting for obesity in korea medicine research. Methods: We searched the studies with key words of 'obesity' and 'fasting or starvation' in Korean database (Korean traditional knowledge portal, OASIS, KISS, KMBASE, DBPIA, RISS). Studies were analyzed for contents, evaluation methods and adverse effects. Results: Twenty-one studies were reviewed. Studies were published in 1983~2015. 1. Studies can be classified into three types: comparative study on before and after, comparative study between groups, case study on other disease occurred during the fasting therapy period. 2. The most common step of fasting were 3 steps: reducing food intakes period (3~5 days), fasting period (7~10 days) and refeeding period (3~5 days) and additional period-diet period (28 days). 3. The most common evaluation methods were body weight (BW), body fat mass (BFM), muscle weight (MW), fat free mass, body mass index, body fat percentage, etc. 4. BW, BFM, MW were reduced largely in fasting period. 5. The most common adverse effects were fatigue, nausea, headache, vomiting, insomnia, etc. Conclusions: As a result of the review papers, fasting therapy have positive effects for obesity. To verify the effectiveness of the fasting, more studies are needed such as randomized controlled trial.

• Structural Engineering and Mechanics
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• 제1권1호
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• pp.75-86
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• 1993

The punching shear strength of concrete flat plates is one of the topics of intensive research in recent years by various concrete structures researchers. This paper reviews four current methods of analysing the punching shear strength at the corner-and edge-column positions of reinforced concrete flat plates. They include those recommended in the Australian Standard AS3600-1988, the American Concrete Institute ACI318-89 and the British Standard on Concrete Practices (BS8110) as well as the approach developed at the University of Wollongong, Australia. Based on half-scale model test results, a comparative study of these four analysis methods is made with regard to their limitation, accuracy and reliability. It is found that the Wollongong approach in general gives the best performance in predicting the punching shear strength of flat plates with torsion strips and those with spandrel beams. The Australian Standard procedure performs just as satisfactorily for flat plates with torsion strips but tends to be unsafe for those with spandrel beams. Both the ACI and the British methods are applicable only to flat plates with torsion strips; they also tend to give unsafe predictions for the punching shear strength.

• 소성∙가공
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• 제26권1호
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• pp.18-27
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• 2017

A comparative study was performed on strain-compensated Arrhenius-type constitutive models established with two regression methods: polynomial regression and regression Kriging. For measurements at high temperatures, experimental data of 70Cr3Mo steel were adopted from previous research. An Arrhenius-type constitutive model necessitates strain compensation for material constants to account for strain effect. To associate the material constants with strain, we first evaluated them at a set of discrete strains, then capitalized on surrogate modeling to represent the material constants as a function of strain. As a result, disparate flow stress models were formed via the two different regression methods. The constructed constitutive models were examined systematically against measured flow stresses by validation methods. The predicted material constants were found to be quite accurate compared to the actual material constants. However, notable mismatches between measured and predicted flow stresses were revealed by the proposed validation techniques, which carry out validation with not the entire, but a single tensile test case.