• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 1994년도 추계학술대회 논문집
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• pp.653-657
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• 1994

A symbolic performance analysis approach for flexible for manufactring systems (FMS) can be formulated based on the integration of Petri Nets (PN) and moment generating function (MGF) concept. In this method, generalized stochastic Petri Nets are used to define performance models for FMS, then MGF nased approach for evaluating stochastic PN is used to derive performance parameters of PN, and finally system performance is calculated. A GSPN model of machine cell is shown to illustrate the proposed method for evaluating such performance indices as production rate, utilization, work-in-process and lead time. The major advantage of this method over existing performance evaluation of FMS is the ability to compute symbolic solutions for performance. Finally future research toward automating performance measure for GSPN models of FMS is discussed.

• 한국시뮬레이션학회논문지
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• 제25권3호
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• pp.85-95
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• 2016

현대 무기체계의 복잡체계화로 인해 국방은 M&S와 T&E가 중요시되고 있으며, 한정적인 자원을 효율적으로 운용하여 시간 및 비용을 절감할 수 있는 연구를 지속적으로 진행하고 있다. 기존연구에서는 프로세스 기반 모델링을 이용한 성능평가 시스템 개발이 진행되고 있지만 성능평가에 합당한 무기체계의 기능을 선정하는데 있어, 객관적 근거나 과학적 방법 이 부족하기 때문에, 같은 기종이라도 상황에 적합한 기능을 선정하기 어렵다. 또한 사용자의 요구사항을 체계적으로 반영할 수 없으며, 다양한 평가요소의 상호작용을 고려하기 힘들다는 문제점이 있다. 따라서 본 논문은 성능평가 시뮬레이션에서 사용되는 평가객체 선정 시, 객체 선정기준과 사용자의 요구사항 및 현실적 상황을 반영할 수 있는 방법을 제시한다. 먼저, 다 기준 의사결정 방법인 ANP기법을 이용하여 객체를 선정하고, 연구결과를 바탕으로 프로그래밍 언어(C#)를 이용한 의사결정 지원시스템을 구현하였다.

• 한국가스학회지
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• 제23권5호
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• pp.8-14
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• 2019

국내 도시가스 보급률은 크게 성장했지만, 국내 가스계량기 계량·안전점검·요금 분야는 아직 서비스 초기방식에서 벗어나지 못하고 있다. 스마트가스미터에 관한 개발과 연구가 활발히 이루어지고 있지만 스마트가스미터의 도입에는 신뢰성과 안전성을 검증할 수 있는 합리적인 성능평가 방안과 기준이 필요하다. 본 논문은 스마트가스미터의 성능을 시험하기 위한 성능시험 시작품을 제작하고 시작품의 실증 운용을 통해 성능평가 방안을 최적화하여 국내에 스마트가스미터가 원활하게 확대/보급될 수 있도록 하는 것을 목적으로 한다.

• 한국통신학회논문지
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• 제21권12호
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• pp.3183-3195
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• 1996

As a method for effective utilization of the limited power and frequency resources in satellite communications, this paper develops software which can assigns the optimal power of input carrier groups inthe multi-level SCPC systems and performs evaluation to a various satellite link environment. Using the developed software, the paper presents performance according to the frequency plan of carrier groups and suggest a frequency play method for performance improvement of satellite link. A various interference and noise caused by satellite link are analyzed for reliable performance evaluation. The performance criteria for evaluation is classified into 2 categories according to the CNR of destination receiver earth station.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2001년도 춘계학술대회논문집
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• pp.239-243
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• 2001

In evaluating sound performance of building, it is important to carry on tests and evaluations based upon residential sound performances. Korean Standards include test methods on sound performance, but don't include any code on evaluation methods. Therefore, evaluation methods from Japan or ISO have been used for evaluating sound performance in domestic so far. In this study, every regulation from ISO, JIS, ASTM, especially for airborne sound insulation against building and building element, is analyzed in order to apply to establishment of Korean Standards on a sound performance evaluation method in buildings.

• 환경영향평가
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• 제19권6호
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• pp.553-561
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• 2010

Railway noise barrier is generally used with welding of joint rail for railway noise reduction in our country. In this study, method for performance evaluation of railway noise barrier using insertion loss was suggested in case of without having noise measurement results before barrier installation. For this, railway noise measurements were performed in commercial high-speed railway site which has railway noise barrier. As a noise level before noise barrier installation, predicted noise level were used. From this method the performance evaluation for railway noise barrier were performed accurately and efficiently.

• 한국시뮬레이션학회:학술대회논문집
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• 한국시뮬레이션학회 2001년도 The Seoul International Simulation Conference
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• pp.136-140
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• 2001

The 3rd generation mobile telecommunication fields are being standardized and developed in two parts, 3GPP and 3GPP2. These two parts have established each Network Architecture Models to achieve the goals basically required in the 3rd generation and to make it progress to IP network in the future. To achieve these goals many system architectures are proposed. Not only functional aspects but also performance aspects are considered as major factors. This paper proposes a new method of performance evaluation modeling and simulation that improved the existing way. The method proposed in this paper is Aspect oriented logical performance analysis Modeling and Simulation method. This proposed method is expected to improve efficiency of performance analysis modeling and simulation on the 3rd generation mobile telecommunication system.

• 한국콘크리트학회:학술대회논문집
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• 한국콘크리트학회 2005년도 봄학술 발표회 논문집(I)
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• pp.343-346
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• 2005

Earthquake resistance design has been developed many countries like Japan, USA, Mexico, New Zealand etc., which countries have experienced many earthquakes. Nowadays, earthquake resistance design has come into worldwide use. In Korea, the seismic design regulations have been established since 1988 in order to minimize the economic losses. Recently performance based design method has been adopted as a new Earthquake resistance design method. These regulations, however, are targeted for newly constructed buildings, In Korea, there are no regulations for existing buildings that built before 1988. So, we need to prepare the regulations that evaluate the seismic performance, furthermore proper retrofitting design guideline needs to be proposed when remodeling old buildings. This study was performed that many existing apartments is being a Remodeling object when considering the present condition of existing apartment and the problems of cost and environment in the future plan. When Remodeling construction is reviewed by former the Seismic Performance Evaluation Method, generating problems is evaluation by using Push-over. According to this, it provides the appropriate method of calculating the Seismic Ship Performance Index.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1996년도 한국자동제어학술회의논문집(국내학술편); 포항공과대학교, 포항; 24-26 Oct. 1996
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• pp.1241-1244
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• 1996

This paper present a performance evaluation method for Timed Place Petri Nets modeled by Live-and-Bounded Circuits (LB-circuits) through a bottom-up approach. The method can handle the case for the nets having common resources(CR). The target system is divided into the sub-systems by disconnecting the common Transition-Transition-Path(TTP) or Place-Place-Path (PPP) between sub-systems. The common PPP pattern is classified into Parallel Common Resource (PCR) and Sequential Common Resource (SCR) in detail for handling common resources. We evaluate the performance of each divided sub-system, and calculate the sub-systems affect on the performance of the whole system. The facts are generalized as a theorem. The developed theorem are applied into the performance evaluation of an automated assembly system shown in an example. All the results are verified by simulation.

• 산업공학
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• 제16권spc호
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• pp.105-110
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• 2003

This paper deals with a performance evaluation model of transporters in refrigerate warehouse. This study focussed on determining refrigerate warehouse design to minimize the expected travel time to improve the transporter performance and to minimize the operating costs. This study proposes the important detail aspects of refrigerate warehouse design, operational parameters and congestions. For solving this problem, we have shown a mathematical model to compute the initial value of the system performance and also a simulation model using AutoMod. A systematic approach proposed in this study for an optimal planning of order-picking warehouse is known as an effective method for the planning of order-picking warehouse and a performance evaluation problem of refrigerate warehouse operation.