컴퓨터 프로그램에 의한 의사결정분석

李昌孝 新羅大學校 1984 論文集 Vol.16 No.-

The aim of decision analysis is to try to supply some aids to the process of decision-making especially where the decision situation involves uncertainty. The idea is that, by proving the analytical framework, the manager will be able to concentrate on supplying the human inputs of intuition and experience one by one withut having to try to juggle these in his head, while at the same time tryinjg to provide further inputs. in this paer, the author concentrated on developing the computer program of Bayesian decision procedure with data and the procedure of computing the expected payoff with continuous variables. This computer program was written in Apple Ⅱ BASIC language and the author used the TriGem020 micro-computer with 48K memory.

부산지역 중소제조업의 경쟁력 강화방안

이창효 세종 1996 삶의 질과 지역불균형 Vol.1996 No.1

공명 광음향셀의 설계

이창효 漢陽大學校 基礎科學硏究所 1990 基礎科學論文集 Vol.9 No.-

공명광음향셀에 대한 공명이론으로부터 계산하여 얻은 수치로 광음향신호의 세기가 최대로 되는 공명광음향셀의 크기를 결정하였다. 이 때 lock-in 증폭기의 측정감도, 마이크로폰의 감도와 직경 등을 고려하여 가능한 한 셀의 크기를 작게 하였다. 결정된 최적 공명광음향셀에서의 광음향신호의 증폭도는 약 19.4이었다. The size of the optimal resonance photoacoustic cell is determined from the numerical values obtained by use of the previous developed resonance theory, considering the measurement accuracy of the lock-in amplifier and the response an diameter of the condenser microphone. It is found that the amplification of the signals in the resonance photoacoustic cell turns out to be 19.4 for the determined values of the optimal size.

對話型 多 屬性效用分析에 관한 硏究

李昌孝 新羅大學校 1988 論文集 Vol.25 No.-

The multiattribute utility theory has been developed for handling uncertainty in outcomes. While there are many decision making models under certainty, only utility function models take into account the decision maker's risk preferences as well as the actuarialrelationship between activities and outcomes. And all utility function assessment techniuqes produce cleary defined statements of the decision maker's preferences. But, multiattribute utility theoryis one of the most confusing topics of multiattribute decision making study mainly due to its sophisticated nature(assumption) and the difficulty in the assessment of utility function. Futher more most of the literature is filled with mathematical proofs. Therefore there remains a certain amount of skepticism concerning the practical usefulness of multiattribute utility theory. A busy decision maker needs a multiattribute utility theory assessment technique which can be easily taught and used, though it may lack the theoretical elegance of techniques proposed by, for example, Keeney and Raiffa. In this paper, we present the interactive multiattribute utility function method which solicits additional information from the decision maker sequentially, through an interactive process, until a final choice is determined. The contribution of this method is in reducting the information burden on the decision maker and thus providing ractical assistance to him. Finally through numerical example, the multiattribute utility function method was compared with the interactive ε-constraint method which was developed by the author for solving the multiobjective optimization problems.

多目的下에서의 意思決定問題에 관한 諸技法의 硏究

李昌孝 新羅大學校 1983 論文集 Vol.14 No.-

The nature of major decision problems has changed drastically in recent years, and serious doubt has been raised as to the adequacy of traditional decision techniques. The awareness of a multiplicity of different objectives in decision-making and management has evoked the need for more adeguate techniques which take into account the multidimensionality and heterogeneity of individual, social or entrepreneurial behaviour. The need for such adjusted methods is even more apparent due to the mutually conflicting or noncommensurable nature of many objectives. Recently several attempts have been made to develop more adequate theories and methods which take into account explicitly the existence of multiple criteria in decision-making. In this paper the author presents various multiobjective decisionmaking techniques for solving multiobjective problems by categorizing them into the multiattribute utility (MAU) models and the goal programming(GP) method.

점유형태 선택과 주거환경 및 주거의식의 관련성 분석 - 수도권 신혼부부 가구를 대상으로 -

이창효,장성만 한국지역학회 2016 지역연구 Vol.32 No.2

The purpose of this study is to explore empirically the effects of the residential environments and housing consciousness on the housing tenure choice of newlyweds in the Seoul metropolitan region. Regarding the results of the empirical analysis, firstly, not only the household’s attributes and housing characteristics but also the residential environments and housing consciousness were significant factors on housing tenure choice. Secondly, as a household considers worse housing quality and better environmental quality surrounding the housing, the household chose Cheonsei housing more often than owner-occupied housing. On the other hand, as a household reviews only better living condition, the selection probability of monthly rent was higher. Thirdly, as a household regards that the housing investment value was more important, the choice probability of owneroccupied housing was higher than that of other tenure types. 본 연구는 주택정책의 주요 대상 중 하나인 신혼부부 가구를 대상으로, 주거환경과 주거의식이 주택 점유형태 선택에 미치는 영향에 대하여 실증적으로 분석하였다. 연구결과, 첫째, 주거환경과 주거의식은 가구속 성 및 주택특성과 함께 주택 점유형태 선택에 유의미한 영향을 미치는 것으로 확인되었으며, 주거환경은 전세 선 택에, 주거의식은 월세 선택에 유의미한 영향을 미치는 것으로 나타났다. 둘째, ‘주거환경’ 측면에서, 주택 자체가 갖고 있는 속성(부(-)의 영향)과 주택을 둘러싸고 있는 주변 환경(정(+)의 영향)은 가구의 자가 대비 전세 선택에 영향을 미쳤다. 반면, 주거지 주변의 거주환경은 가구가 자가보다 월세를 선택하는데 정(+)의 영향을 미쳤다. 셋 째, ‘주거의식’과 관련하여, 주택에 대하여 거주목적보다 투자목적의 자산가치에 중점을 두는 가구는 자가를 선택 할 확률이 높은 것으로 확인되었다

수도권 노후공동주택단지의 입지 특성 및 잠재력 분석

이창효,이삼수 한국감정평가학회 2019 감정평가학논집 Vol.18 No.3

The purpose of this study is to propose and apply analytical methodologies for the spatial distribution, location characteristics, and potential for urban regeneration of aged apartment complexes through constructing a spatial database of Seoul metropolitan apartment complexes. The detailed items of spatial distribution characteristics of apartment complex consisted of the number of complexes the number of households, and developed density, and those of location characteristics and potential included rail availability, highway and urban motorway availability, additional development capacity, and potential demands related to residential development. As a result of the analyses for these items, aged apartment complexes over 30 years after construction were relatively better in the regeneration conditions such as location characteristics and potential, compared to the apartment complexes for less than 15 years. 본 논문은 수도권에 소재한 공동주택단지의 공간 데이터베이스 구축을 위해 필요한 주요 항목을 설정하고, 관련 자료의 수집ㆍ가공을 통해 구축한 공동주택단지 공간 데이터베이 스를 활용하여 공간적 분포와 입지 특성 및 잠재력에 대한 분석 방법론을 제안하였다. 주 요 분석 내용과 결과는 다음과 같다. 첫째, 공동주택관리정보시스템의 단지정보를 활용한 공동주택단지 공간 데이터베이스 구축 과정과 방법론을 제시하였다. 둘째, 공동주택단지 의 분포 특성 분석 항목으로 단지 및 세대수 그리고 개발밀도(용적률)를 선정하였고, 입 지 및 잠재력 항목으로는 철도 이용성, 고속도로 및 도시고속도로 이용성, 개발가능용량, 주택 잠재수요 등을 선정하였다. 셋째, 공동주택단지의 입지 및 잠재력 항목의 구축 자료 는 노후공동주택단지 재생을 위한 사업성 검토에 활용할 수 있는 유용한 정보가 될 수 있다. 넷째, 분석 결과에서 주목할 만한 점은 양호한 입지와 추가적인 개발가능용량을 갖 는 경과년수 30년 초과 노후공동주택단지에 비해, 경과년수 15년 이하의 공동주택단지 의 입지 특성은 상대적으로 좋지 않은 뿐만 아니라 현재의 개발밀도 역시 높은 것으로 나타나, 향후 노후화에 따른 공동주택단지 재생에 있어 상대적으로 불리한 조건임을 확 인하였다.

광음향 효과에 의한 고체의 열확산도 결정

이창효 漢陽大學校 基礎科學硏究所 1987 基礎科學論文集 Vol.6 No.-

Rosencwaig-Gersho 이론을 수치 해석함으로써 고체시료의 열확산도를 결정하는 새로운 방법을 알아내었다. 동일 두께의 고체시료에 대해서는 부착한 배경물질의 종류에 관계없이 광음향신호의 세기가 같아지는 광단속진동수가 존재하며, 이 광단속진동수는 시료의 두께에 따라 달라진다. 이러한 광단속진동수와 시료의 두께 사이 관계를 log-log 그래프로 표시하면 직선으로 나타나며 ?? 일 때의 직선과의 간격으로 열확산도를 결정할 수 있었다. 이 방법으로 결정한 구리와 알루미늄의 열확산도는 각각 1.20cm²/s와 0.85cm²로 이 값은 공인된 값과 일치하였다. In this work a new method determining the thermal diffusivities has been attem pted with the help of the numerical analysis of the Rosencwaig-Gersho theory. It is shown that when different backing materials are attached to a solid sample of given thicknes there exists an optical chopping frequency contributing to the same photoacoustic signal intensities regardless of the backing materials. And it is also shown that the chopping frequency depends on the sample thickness. The relation between the chopping frequency and the sample thickness shows a straight line on the log-log graph. The thermal diffusivties are determined by the distance shifted from the line of ??. The thermal diffusivities of copper and aluminium obtained by this method are 1.20cm²/s and 0.85cm²/s respectively, which agree with the values shown elsewhere.

부산지역 전략산업 선정에의 계층화 분석과정 적용

이창효 한국경영과학회 1999 經營 科學 Vol.16 No.1

AHP is a well-known multiattribute decision technique that has been applied to private and public areas it is well suited to group decision making and offers many benefits as a synthesizing mechanism in group decisions This paper explains why the AHP is well-suited to group decision making by means of the case study Through this case study, this paper tried setting priorities for the strategic industry with the focus on the small and medium industry in Pusan

多目的線型計劃問題에서의 選好解 探索

李昌孝 新羅大學校 1985 論文集 Vol.19 No.-

Among the preferred solution searching methods in multiobjective linear programming problems, this paper reviews in the first place, two representative methods, namely, the interactive subgradient method and the SWT method. Next, the interactive constraint method is presented by the author, as an aid in solving multiobjective linear programming problems. The advantages or characteristics of this method are following: (1) We can omit the redundant objective functions, because they do not affect the efficient solutions set. (2) Instead of providing an ordinal ranking to each of its objectives, this method needs only selecting the least important objective and this objective selected would be in the objective function as the primary objective. (3) Based on Simon`s theory of satisficing, this method determines the preferred solution or satisficing solution that is close to the minimum satisfactory level of the DM. (4) The DM is reguired only to provide yes or no answers to questions regarding the desirability of increase or decrease in objectives function values of solutions that he will not accept as optimal, i.e., not unduly demanding of the DM. (5) To obtain the preferred solution, this method requires only ε-levels which reflects the DM`s minimum satisfaction levels for each objective and the adjustment of this levels in the course of the analysis. (6) A LP optimization routing, i.e., the standard simplex algorithm could be used.