• 제목/요약/키워드: problem making

검색결과 2,373건 처리시간 0.027초

계층분석방법을 이용한 액체로켓엔진 개발의 주요 이슈에 대한 의사결정 방안 (Making-Decision Method on Major Issues of Liquid Rocket Engine Development using Analytic Hierarchy Process)

  • 서견수;정은환
    • 한국추진공학회:학술대회논문집
    • /
    • 한국추진공학회 2017년도 제48회 춘계학술대회논문집
    • /
    • pp.1104-1107
    • /
    • 2017
  • 본 논문에서는 액체로켓엔진 개발과정에서 제기될 수 있는 주요 이슈에 대한 의사결정의 효율적 수단으로써 계층분석방법(AHP)에 주목하였으며, 액체로켓엔진의 추진제 선정 문제를 통하여 계층분석 방법의 유효성 및 적용가능성을 검토하였다.

  • PDF

A Simulation Study of the Handoff Algorithms Based on Fuzzy Decision Making

  • Cheong, Han-Ho;Kim, Kyoung-Sik-;Lee, Joonwhoan-
    • 한국지능시스템학회:학술대회논문집
    • /
    • 한국퍼지및지능시스템학회 1993년도 Fifth International Fuzzy Systems Association World Congress 93
    • /
    • pp.1342-1345
    • /
    • 1993
  • In the cellular mobile communications as decreasing the cell radius to increse the reuse factor of frequencies, the handoff requests are increasing so that the efficient handoff decision making becomes a crucial problem. In this simulation study, we evaluate a set of handoff algorithms based on fuzzy-multicriteria decision making. These algorithms uses the parameters including the received signal strength intensity, the bit error rate and the distance between a mobile station and a base station. We compare the fuzzy algorithms in terms of call block ratio and handoff request ratio and call force ratio, and show the applicability of those algorithms in the cellular mobile communication systems.

  • PDF

건설자동화를 위한 철골 공사 계획의 의사결정 영향요인에 관한 연구 (A Study on the Influential Factors on Decision Making of Frame Construction Scheduling For Automated Construction)

  • 최정필;김경환;김재준
    • 한국건축시공학회:학술대회논문집
    • /
    • 한국건축시공학회 2009년도 춘계 학술논문 발표대회 학계
    • /
    • pp.209-212
    • /
    • 2009
  • During the last few decades, several companies and research laboratories have developed construction robots in an effort to improve productivity, quality, and reduce construction time and safety concerns. Recently, domestic construction industry is also interested in developing the construction robots. However, the studies on the research and development process is impossible in real field. A existing research's object is the development of the research on the assumption that construction's environment is a fixed form, But real construction's environment is very dynamic and atypical. So it is very difficult that we apply construction automation and robots. In order to solve this problem, this study deduce influential factors on decision making of frame construction scheduling for automated construction.

  • PDF

A Generalized Intuitionistic Fuzzy Soft Set Theoretic Approach to Decision Making Problems

  • Park, Jin-Han;Kwun, Young-Chel;Son, Mi-Jung
    • International Journal of Fuzzy Logic and Intelligent Systems
    • /
    • 제11권2호
    • /
    • pp.71-76
    • /
    • 2011
  • The problem of decision making under imprecise environments are widely spread in real life decision situations. We present a method of object recognition from imprecise multi observer data, which extends the work of Roy and Maji [J Compu. Appl. Math. 203(2007) 412-418] to generalized intuitionistic fuzzy soft set theory. The method involves the construction of a comparison table from a generalized intuitionistic fuzzy soft set in a parametric sense for decision making.

SINE TRIGONOMETRIC SPHERICAL FUZZY AGGREGATION OPERATORS AND THEIR APPLICATION IN DECISION SUPPORT SYSTEM, TOPSIS, VIKOR

  • Qiyas, Muhammad;Abdullah, Saleem
    • Korean Journal of Mathematics
    • /
    • 제29권1호
    • /
    • pp.137-167
    • /
    • 2021
  • Spherical fuzzy set (SFS) is also one of the fundamental concepts for address more uncertainties in decision problems than the existing structures of fuzzy sets, and thus its implementation was more substantial. The well-known sine trigonometric function maintains the periodicity and symmetry of the origin in nature and thus satisfies the expectations of the experts over the multi parameters. Taking this feature and the significance of the SFSs into the consideration, the main objective of the article is to describe some reliable sine trigonometric laws (ST L) for SFSs. Associated with these laws, we develop new average and geometric aggregation operators to aggregate the Spherical fuzzy numbers (SFNs). Then, we presented a group decision- making (DM) strategy to address the multi-attribute group decision making (MAGDM) problem using the developed aggregation operators. In order to verify the value of the defined operators, a MAGDM strategy is provided along with an application for the selection of laptop. Moreover, a comparative study is also performed to present the effectiveness of the developed approach.

A Genetic Algorithm Based Approach to the Profitable Tour Problem with Pick-up and Delivery

  • Lee, Hae-Kyeong;Ferdinand, Friska Natalia;Kim, Tai-Oun;Ko, Chang-Seong
    • Industrial Engineering and Management Systems
    • /
    • 제9권2호
    • /
    • pp.80-87
    • /
    • 2010
  • As express courier market expands rapidly, companies are exposed to fierce competition. To cope with struggle for their survival, they are continuously making efforts to improve their service system. Even if most of service centers are directly linked to a consolidation terminal in courier service network, some of them with regional disadvantages are operated in milk run type from/to the consolidation terminal, which is a traditional PDP (Pick-up and Delivery Problem). This study suggests an approach to solve the PDP with the objective of maximizing the incremental profit, which belongs to PTP (Profitable Tour Problem) class. After the PTP is converted to TSP (Traveling Salesman Problem) with the same objective, a heuristic algorithm based on GA (Genetic Algorithm) is developed and examined through an example problem in practice of a courier service company in Korea.

유비쿼터스 환경에서 다중 동적 의사결정지원시스템(UMD-DSS) : 비구조적 문제 중심으로 (Multi-dynamic Decision Support System for Multi Decision Problems for Highly Ill.structured Problem in Ubiquitous Computing)

  • 이현정;이건창
    • 지능정보연구
    • /
    • 제14권2호
    • /
    • pp.83-102
    • /
    • 2008
  • 본 연구에서는 무선 네트워크 접속기능을 갖춘 유비쿼터스 컴퓨팅 환경에서의 다중 동적 의사결정지원시스템(Multi-Dynamic Decision Support System in Ubiquitous Computing; UMD-DSS)을 제안한다. 즉 유비쿼터스 컴퓨터환경에서의 의사결정은 다수의 유동 참여자들이 시시각각 변화하는 정보를 기반으로 의사결정자들 개인의 목적과 참여된 집단의 목적을 동시에 만족하는 의사결정을 지원한다. 이를 위해 본 연구에서 제안하는 의사결정지원시스템은 혼합형구조를 이룬다. 개별 의사결정자들의 의사결정을 지원하는 분산형 의사결정지원시스템과 의사결정자가 속한 집단의 목적함수를 최대화를 지원하는 중앙집중형 의사결정 시스템이 혼합된 혼합형 의사결정지원시스템을 제안한다. 혼합형 의사결정지원시스템의 기본 구조는 의사결정에 참여하는 개별에이전트들로부터 인식된 상황정보를 이용한 의사결정프로세스를 관리하는 의사결정프로세서, 다중 에이전트들을 관리하는 다중 에이전트 프로세서 및 의사결정을 위해 필요한 지식을 관리하는 지능적 지식관리 프로세서로 구성된다. 유비쿼터스 컴퓨터 환경에서의 의사결정은 시간과 공간의 제약을 받지 않으며 다중 유동의사결정자의 의사결정을 동시에 할 수 있고, 이러한 의사결정이 의사결정자가 속한 집단의 목적함수를 최대화 할 수 있도록 해야 한다. 이에 적합한 비구조적인 문제인 유풀필먼트(u-Fulfillment)의 특징은 다음과 같다. 의사결정에 참여하는 유동 의사결정자가 다수이며 시시각각으로 변하는 문제에 즉각적인 대응이 요구되고 단기간의 공유된 정보를 활용하여 의미 있는 의사 결정이 요구되는 특징이 있다. 따라서 본 연구에서는 유풀필먼트(u-Fulfillment)를 본 연구의 활용 대상으로 하여 유비쿼터스 다중 동적 의사결정지원시스템을 제안한다.

  • PDF

융복합 기반 통합시뮬레이션실습 교육이 간호대학생의 임상의사결정능력, 문제해결과정, 임상수행능력, 핵심기본간호술 수행 자신감에 미치는 효과 (Effects of Convergence-based Integrated simulation Practice program on the Clinical decision making, Problem solving process, Clinical competence and Confidence of core fundamental nursing skill performance for Nursing Students)

  • 문미영
    • 디지털융복합연구
    • /
    • 제15권7호
    • /
    • pp.271-284
    • /
    • 2017
  • 본 연구는 융복합 기반 통합시뮬레이션실습 교육이 간호대학생의 임상의사결정능력, 문제해결과정, 임상수행능력, 핵심기본간호술 수행 자신감에 미치는 효과를 확인하고자 수행되었다. 연구설계는 단일군 사전사후설계에 의한 실험연구로 연구대상은 C도 소재 일개 4년제 대학 간호학과 4학년 학생 64명이었으며 연구기간은 2016년 9월 5일부터 2016년 12월 6일까지였다. 연구결과 통합시뮬레이션실습 교육 운영 후 문제해결과정 (t=-3.052, p<.01), 임상수행능력(t=-4.279, p=.000), 핵심기본간호술 수행 자신감(t=-2.416, p<.05)의 점수가 사전에 비해 사후에 유의하게 증가하였다. 본 연구를 통하여 통합시뮬레이션실습 교육이 4학년 간호대학생의 문제해결과정, 임상수행능력, 핵심기본간호술 수행 자신감의 임상실습 수행에 긍정적인 효과를 제공하므로 이를 지속적으로 적용하고 운영하는 교육과정이 필요할 것으로 생각된다. 과학적이고 분석적인 평가 도구와 프로그램의 개발이 필요하며 간호대학생의 학년별, 과목별 시뮬레이션실습과목의 통합을 과학적으로 분석하는 시스템이 필요하리라 생각된다.

Implementation Of Client Management Database Program For Digital Hearing Aids Fitting System

  • Lee Gun Jae;Park Byoung Uk;Yoo Dong Gu;Kim Hack Yoon
    • 대한전자공학회:학술대회논문집
    • /
    • 대한전자공학회 2004년도 학술대회지
    • /
    • pp.755-758
    • /
    • 2004
  • A hearing aid performs the role of fitting in order to provide those with a hearing problem with a better hearing ability in ordinary circumstances. The existing Fitting system in the hearing aid is consisted somewhat complex, and simply performs the role of Fitting without any supervisions of those with a hearing problem. Such is these methods makes it unable to establish an organized supervision, and shows a problem in making high efficiency. In order to solve this problem mentioned as above, the based thesis have connected the Fitting program and the patient-management database program for the easy use by the user.

  • PDF

Approximate Dynamic Programming-Based Dynamic Portfolio Optimization for Constrained Index Tracking

  • Park, Jooyoung;Yang, Dongsu;Park, Kyungwook
    • International Journal of Fuzzy Logic and Intelligent Systems
    • /
    • 제13권1호
    • /
    • pp.19-30
    • /
    • 2013
  • Recently, the constrained index tracking problem, in which the task of trading a set of stocks is performed so as to closely follow an index value under some constraints, has often been considered as an important application domain for control theory. Because this problem can be conveniently viewed and formulated as an optimal decision-making problem in a highly uncertain and stochastic environment, approaches based on stochastic optimal control methods are particularly pertinent. Since stochastic optimal control problems cannot be solved exactly except in very simple cases, approximations are required in most practical problems to obtain good suboptimal policies. In this paper, we present a procedure for finding a suboptimal solution to the constrained index tracking problem based on approximate dynamic programming. Illustrative simulation results show that this procedure works well when applied to a set of real financial market data.