• Proceedings of the Safety Management and Science Conference
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• 2001.05a
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• pp.173-178
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• 2001

This paper studies the structure and reliability of homogeneous s-coherent multistate system. We describe efficiency of inclusion-exclusion algorithm and pivotal decomposition algorithm for reliability calculation of 2-states system which developed in (Lee 1999) ［10］. We extend our method, applied in ［10］, to the case when components of the system are given multi-states. As an application, the high pressure injection system of a pressurized water reactor is modeled as a multistate system composed of homogeneous s-coherent multistate subsystems. And Several examples are illustrated.

• Journal of Korean Society for Quality Management
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• v.35 no.2
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• pp.99-105
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• 2007

Most of systems used in real fields are considered as multistate systems with multistate components. As one of methods for performance evaluation of the system, reliability analysis has been popularly used. In this paper, we propose an improved reliability analysis method which is based on state space decomposition method of Aven (1985). In deriving upper bounds, our method uses sets of unspecified states whereas Aven (1985) excludes sets of unacceptance states. Also, closer lower bounds to an exact reliability are obtained by considering of importance of min-path vectors.

• Journal of Korean Society for Quality Management
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• v.20 no.1
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• pp.11-21
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• 1992

The Purpose of this paper contribute to design the multistate Markov process for the reliability of a system when the transition-rates of each unit depend on the current state of the system. The system transition-rate matrix has the form of the kronecker sum of transition rate matrices for the units, is analyzed and investigated. As a result, the system which has the state-dependent units is detaily analyzed and introduced by the approach of an algorithm for the system transition-rate matrix based on the kronecker algebra.

• Journal of Applied Reliability
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• v.3 no.1
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• pp.1-12
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• 2003

A continuum structure function(CSF) is a non-decreasing mapping from the unit hypercube to the unit interval. A Barlow-Wu type CSF is a CSF whose behaviour is modeled by its underlying binary structure, which is based on the multistate structure functions suggested by Barlow and Wu(1978). As the measures of importance of a system component for a Barlow-Wu type CSF, the structural and reliability importance of a component at system level ${\alpha}$ (0< ${\alpha}$ <1) are defined and their properties are deduced. Computational results are discussed as well for illustrative purpose.

• Journal of information and communication convergence engineering
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• v.1 no.2
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• pp.93-97
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• 2003

This paper proposes a new generation scheduling algorithm which can consider total quantity of contamination and energy limits based on Lagrangian Relaxation. First, we formulate a Lagrangian function which consider quantity of contamination including substitution of fuel, and quantity of fuel. Second, we developed Multi-state S.U.D.P. which can treat multiple fuels. Third, we propose an effective generation scheduling algorithm including Multi-state S.U.D.P.. As a results, unit commitment and generating power can be obtained to meet the environmental and fuel constraints with fuel substitution. By applying it to the test system, effectiveness of the method is verified.

• Journal of the Korean Society of Clothing and Textiles
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• v.39 no.1
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• pp.133-146
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• 2015

King and Crown Prince's Gwanbok (冠服) written in "Goryeosa" Yeobokji was the bestowment of robes and crowns by the Son of Heaven who yielded hegemony over East Asia. It designated the King and Crown Prince of Goryeo as real and authentic as well as confirmed the political status of Goryeo in East Asia. In "Goryeosa" Yeobokji, the King's Gwanbok is of higher stature than the adornments of the King's ritual robes (祭服) and court robes (朝服) which held a domestic political significance. In East Asia, bestowment of voiture (車) and robe (服) usually appeared in the multistate system. In the $10^{th}$ century, the Later Jin (後晋) spread the idea of investiture and bestowment to Khitan (契丹). The Liao (遼) or Khitan and the Jin (金), the Conquest Dynasties, endeavored to establish the legitimacy of the Son of Heaven by imitating Sinocentrism by means of investiture and bestowment. In the reign of XingZong (興宗) and DaoZong (道宗) of Liao, the ritual of investiture and bestowment for Goryeo was in the making, adding titles and bestowments in the occasion of the elevation of Emperor Liao's honorific title. King Munjong (文宗) of Goryeo reached 9-bestowment which symbolized the first of the feudal lords in East Asia. This exceptional respect for Goryeo went on to Jin's investiture and bestowment. From then, 9-bestowment was defined as an international decorum (禮) toward Goryeo. This historical study of Gwanbok (冠服) of "Goryeosa", indicates: First, the King's Ceremonial Robe with Nine-symbol Design were designated from the early to middle of the Goryeo Dynasty by investiture and bestowment from the Conquest Dynasties. Second, the bestowed King's Robe and Crown had simultaneous functions for domestic order and international order. Goryeo did not follow ideological Sinocentrism but followed practical interest by accepting Confucian Li (禮) philosophy passed on through the Conquest Dynasties.