• 대한수학회지
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• 제43권5호
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• pp.931-950
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• 2006

We study the identification problems of constant parameters appearing in the perturbed sine-Gordon equation with the Neumann boundary condition. The existence of optimal parameters is proved, and necessary conditions are established for several types of observations by utilizing quadratic optimal control theory due to Lions [13].

• 대한음성학회지:말소리
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• 제39호
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• pp.25-42
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• 2000

In this paper, I have shown how to associate a musical beat with a note within the framework of Optimality Theory. And the following hierarchy of constraints is suggested to associate a sub-beat with a note. Alternation Sub-beat CCC Head $\gg$ Beat-to-Note $\gg$ Note-to-Beat EQ-Beats Smaller Note Furthermore, I have tried to explain Sprung Rhythm with a musical beat system. I have suggested the following hierarchy for Sprung Rhythm. Head $\gg$ SCSR Using a sub-beat on the basis of Head $\gg$ SCSR shows the abrupt change of Sprung Rhythm well.

• 응용통계연구
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• 제22권5호
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• pp.1097-1102
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• 2009

Classification of subjects with unknown distribution in small sample size setup may involve order-restricted constraints in multivariate parameter setups. Those problems makes optimality of conventional likelihood ratio based statistical inferences not feasible. Fortunately, Roy (1953) introduced union-intersection principle(UIP) which provides an alternative avenue. Redescending M-estimator along with that principle yields a considerably appropriate robust testing procedure. Furthermore, conditionally distribution-free test based upon exact permutation theory is used to generate p-values, even in small sample. Applications of this method are illustrated in simulated data and read data example (Lobenhofer et al., 2002)

• 대한수학회보
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• 제51권3호
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• pp.847-862
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• 2014

Finite element approximation solutions of the optimal control problems for stochastic Stokes equations with the forcing term perturbed by white noise are considered. Error estimates are established for the fully coupled optimality system using Brezzi-Rappaz-Raviart theory. Numerical examples are also presented to examine our theoretical results.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2002년도 ICCAS
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• pp.75.1-75
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• 2002

Several model order reduction methods for large RLC circuits have been developed in the last few years. Krylop subspace based methods are extremely effective for generating the low order models of large system but there is no optimal theory for the resulting models. Alternatively, methods based truncated balanced realization have an optimality property but are too computationally expensive to use on complicated problems such as large RLC circuits. In this paper, we present a method for improving time domain response of reduced order RLC circuits. The method used here is based on combing Krylop subspace based method and truncated balanced realization method plus residualization. The metho...

• 한국통계학회:학술대회논문집
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• 한국통계학회 2003년도 춘계 학술발표회 논문집
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• pp.203-206
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• 2003

This paper studies constrained optimization of an M/G/1 queue with a server that can be switched on and off. One criterion is an average number of customers in the system and another criterion is an average operating cost per unit time, where operating costs consist of switching and running costs. With the help of queueing theory, we solve the problems of optimization of one of these criteria under a constraint for another one.

• 한국환경교육학회지:환경교육
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• 제13권2호
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• pp.38-50
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• 2000

We are evidently Home Economicus, egoistic rational utility maximiger, and all the capitalism economic situation make us adapt to such life, and recognize that it is rational to act like that. This can be demonstrated in Prisoner′s Dilemma(PD) which always select the non-cooperative choice for free rider in rational selection process of public goods. This paper notice the "what is problem\ulcorner"The problem is not in free rider itself but in free rider egoism. The practical behavior of free rider egoism can be explained by way of Prisoner′s Dilemma. In PD situation, the prisoner makes a rational choice, non-cooperative alternative, but he doesn′arrive at preto-optimality. It is dilemma. Why can′t he arrive \ulcorner Because he is isolated from other prisoner. So we call it prisoner′s dilemma. The PD situation can be compared with our real economic life, which, we think, have kept by rational choice of the public goods. We actually have made our life as an individual one although we organized communities of capitalism. Of course, we know each others as members of same society, but each individual being can′t secure the belief, which has composed basis of community. So, it is very similar and common between PD situation and our real economic life in the production of public goods. We conclude that this non-cooperative process of PD situation can be utilized as instrument of EE. So this non-cooperative process can show us the effectiveness of EE as follows. \circled1 Game situation life PD can be used as good instrument for explaining the rational selection dilemma(error) to Homo-Economicus, the rational agent, with the optimal and rational language. \circled2 We can show that the selection result is dilemma, not arrive pareto - optimality. \circled3 The dilemma can be resolved with accomplishing the good communal life based on the belief, not on the isolation.

• 정보기술응용연구
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• 제2권1호
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• pp.113-137
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• 2000

ERP가 기업의 정보를 통합하는데 유용한 시스템이라는 것에는 의심할 바가 없다. 그러나 많은 회사들은 ERP시스템을 도입하는 것을 주저하고 있다. 주요한 이유는 유지보수를 포함한 ERP 구축에 엄청난 총비용이 들기 때문이다. 특별히 프로세스를 리엔지니어링(reengineering)하거나, 시스템이 각 기업에 경영지식을 담도록 하는 맞춤화 작업이 적절한 시간에 수정 보완되어지지 않는다면 ERP가 내놓는 성과의 최적화의 결과를 보장할 수 없다. 그러므로 본 논문은 ERP가 내놓는 성과의 최적화의 결과를 보장할 수 없다. 그러므로 본 논문은 ERP시스템의 사용자와 데이터베이스에 의해 발생되는 환경적 변화 그 자체를 수용하는 ERP시스템을 구축하는데 목표를 두고 있다. ERP시스템이 최적의 성과를 유지하도록 하기 위해 페트리넷 이론(petri-net theory)과 지능형 성과를 에이전트기술(Intelligent agent technology)을 사용하였다. 지능형 에이전트는 데이터베이스를 통합하고 예외적인 변화 상황을 발견하며, 그 변화가 ERP시스템의 성과에 어떤 영향을 주게 되는지에 대해서 각 에이전트끼리 자동적으로 협동하게 된다. 해당 에이전트의 역동성은 페트리넷으로 표현되었다. 새롭게 제안된 ERP시스템은 BPR(business process reenginnering)의 프로세스들을 최적 상태로 유지하도록 만들 것이다. 마지막으로 제안된 ERP 유지 보수 시스템의 타당성을 설명적인 물류부분 사례를 통해 제시하였다.

• Smart Structures and Systems
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• 제22권3호
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• pp.249-257
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• 2018

This study contributes to evaluate multiphase topology optimization design of plate-like elastic structures with constant thickness and Reissner-Mindlin plate theory. Stiffness and adjoint sensitivity formulations linked to Reissner-Mindlin plate potential energy of bending and shear are derived in terms of multiphase design variables. Multiphase optimization problem is solved through alternative active-phase algorithm with Gauss-Seidel version as an optimization model of optimality criteria. Numerical examples verify efficiency and diversity of the present topology optimization method of Reissner-Mindlin elastic plates depending on multiphase and Poisson's ratio.

• 인문언어
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• 제5권
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• pp.221-264
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• 2003

This paper takes issue with the idea of language as a 'serial-time structure' as opposed to the 'real-time event' of speech, an idea entrenched in Chomskyan model of linguistic theory. The discussion centers around the leitmotif question: Is language constructed entirely from a finite set of apriori discrete symbol types, as the 'competence vs performance' dichotomy implies\ulcorner A set of linguistic patterns examined in this study, largely with regard to phonological considerations, points to the evidence to the contrary. That is, while the patterns may be said to be linguistically distinct, they are not discretely, different, i.e. not different enough to be reliably differentiated. It is demonstrated that much of current research in phonology, including the most recent Optimality Theory, is misdirected in that it falsely presupposes a discrete universal phonetic inventory. The main thrust of the present study is that there is no sharp boundary between 'competence' defined as the formal, symbolic, discrete time domain of language and human cognition on the one hand and 'performance' as the continuous, fuzzy, real-time domain of human physiology on the other.