• Title, Summary, Keyword: design strategy

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Development of Pareto strategy multi-objective function method for the optimum design of ship structures

  • Na, Seung-Soo;Karr, Dale G.
    • International Journal of Naval Architecture and Ocean Engineering
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    • v.8 no.6
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    • pp.602-614
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    • 2016
  • It is necessary to develop an efficient optimization technique to perform optimum designs which have given design spaces, discrete design values and several design goals. As optimization techniques, direct search method and stochastic search method are widely used in designing of ship structures. The merit of the direct search method is to search the optimum points rapidly by considering the search direction, step size and convergence limit. And the merit of the stochastic search method is to obtain the global optimum points well by spreading points randomly entire the design spaces. In this paper, Pareto Strategy (PS) multi-objective function method is developed by considering the search direction based on Pareto optimal points, the step size, the convergence limit and the random number generation. The success points between just before and current Pareto optimal points are considered. PS method can also apply to the single objective function problems, and can consider the discrete design variables such as plate thickness, longitudinal space, web height and web space. The optimum design results are compared with existing Random Search (RS) multi-objective function method and Evolutionary Strategy (ES) multi-objective function method by performing the optimum designs of double bottom structure and double hull tanker which have discrete design values. Its superiority and effectiveness are shown by comparing the optimum results with those of RS method and ES method.

A Study on the Design Characteristics based on the Distinction Strategies of Korean Main City Department Stores - through the analysis of case studies from 1990 to present - (우리나라 주요 도심 백화점의 차별화 전략에 따른 디자인 특성에 관한 연구 - 1990년대 이후 현재까지 사례분석을 중심으로 -)

  • 김현관;최상헌
    • Korean Institute of Interior Design Journal
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    • no.39
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    • pp.92-99
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    • 2003
  • Big 3 Korean department stores - Lotte, Hyundai, and Shinsegae have pursued a differentiation strategy in order to survive the era of big-bang. This study has proposed to present a frame work with which we can recognize the character of design, which is pertinent to a differentiation strategy. The results of study are as follow ; 1) Lotte department store reveals the 3 strategies - location, composition and specialization strategy and the character of design has traditional, high class and neutral disposition. 2) Hyundai department store reveals high class strategy and the character of design has high class and modern disposition. 3) Shinsegae department store reveals high class and specialization strategies and the character of design has high class, tradition and modem disposition.

Equilibrium Bidding Strategy and Optimal Auction Design of Sequential Auction (축차경매의 평형입찰전략과 최적경매설계)

  • Kim, Yea-Gen;Park, Soon-Dal
    • Journal of the military operations research society of Korea
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    • v.13 no.2
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    • pp.63-83
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    • 1987
  • This study is concerned with the equilibrium bidding strategy and the optimal auction design of sequential auction with a reserve price and an entry fee. It is assumed that each bidder has a fixed reservation value and draws the reservation values of other bidders independently in the same distribution and may obtain at most one object to be sold. Under such assumptions, the sequential auction will be analyzed by the game theoretic approach. The purpose of this paper is, in the sequential auction, to find the equilibrium bidding strategy and to design the optimal auction under the equilibrium bidding strategy. The equilibrium bidding strategy and the optimal auction design are further analyzed with respect to change of the reserve price, the entry fee, and the number of bidders and objects. Specially, the auctioneer's expected revenue for each auction is obtained and analyzed.

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Equilibrium Bidding Strategy and Optimal Auction Design of Sequential Auction (축차경매의 평형입찰전략과 최적경매설계)

  • Kim, Yea-Gen;Park, Soon-Dal
    • Journal of the military operations research society of Korea
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    • v.14 no.1
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    • pp.63-83
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    • 1988
  • This study is concerned with the equilibrium bidding strategy and the optimal auction design of sequential auction with a reserve price and an entry fee. It is assumed that each bidder has a fixed reservation value and draws the reservation values of other bidders independently in the same distribution and may obtain at most one object to be sold. Under such assumptions, the sequential auction will be analyzed by the game theoretic approach. The purpose of this paper is, in the sequential auction, to find the equilibrium bidding strategy and to design the optimal auction under the equilibrium bidding strategy. The equilibrium bidding strategy and the optimal auction design are further analyzed with respect to change of the reserve price, the entry fee, and the number of bidders and objects. Specially, the auctioneer's expected revenue for each auction is obtained and analyzed.

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Sari Case Design & Strategy Study (목(나전)칠기 사리(舍利)용기의 조형디자인 연구)

  • Kim, Jae-Won
    • The Journal of the Korea Contents Association
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    • v.9 no.11
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    • pp.192-200
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    • 2009
  • Market in the 21st century innovative products is not the same as marketing traditional products and services. Whether for survival or to sustain market leadership, Design Marketing Strategy is the key in the new era of world competition. Design Strategies are also more critical issues in the future, because most business and firms depend on successful design project. In order to effectively bring creative professional output to market, design leaders who can use design intelligence to shape the future of their organizations and business must evidence marketing strategy technology, creative and managerial skill. Design Management links design and related business activities into a creative and coordinated strategy for creating value and sustainable advantage for the firm. Design education has focused primarily in the training of professional designers within their specific disciplines. But it dose not provide training in the management skills necessary to effectively lead a design project team. Most design colleges do not provide any integrated education in leadership and team building, strategy, finance, marketing or project management. This is the time that Design Management Program should be prepared to provide design students who want to manage design project in creative industry. The program has to be prepared to provide all the business skills and information that design students need to know in an upper-level undergraduate school. The Program's goal is to graduate design leaders able to strategically manage a design project for the challenge of managing in the 21st century.

A Study on an Optimal Design of a Triple-band PIFA using the Evolution Strategy (진화 알고리즘을 이용한 삼중대역 PIFA 최적 설계에 관한 연구)

  • Ko, Jae-Hyeong;Kim, Koon-Tae;Kim, Kyong-Ah;Kim, Hyeong-Seok
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.59 no.4
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    • pp.768-773
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    • 2010
  • In this paper, we study on an optimal design of a triple-band PIFA (Planar Inverted-F Antenna) of 433 MHz, 912 MHz and 2.45 GHz by using evolution strategy. Generally, the resonant frequency of the PIFA is determined by the width and length of a U-type slot used. However the resonant frequencies of the multiple U slots are varied by the mutual effect of the slots. Thus the optimal width and length of U-type slots are determined by using an optimal design program based on the evolution strategy. To achieve this, an interface program between a commercial EM analysis tool and the optimal design program is constructed for implementing the evolution strategy technique that seeks a global optimum of the objective function through the iterative design process consisting of variation and reproduction. The resonant frequencies of initial model are 439.5 MHz, 981.5 MHz and 2.563 GHz. However, the resonant frequencies of the triple-band PIFA yielded by the optimal design program are 430.5 MHz, 907 MHz and 2.4515 GHz. Measured resonant frequencies are 433.5 MHz, 905.5 MHz and 2.454GHz, which show a good agreement with the simulation results.