• 제목/요약/키워드: 김영찬

검색결과 573건 처리시간 0.031초

네트워크형 가로망의 교통신호제어 최적화 모형개발 (Development of Optimization Model for Traffic Signal Timing in Grid Networks)

  • 김영찬;유충식
    • 대한교통학회지
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    • 제18권1호
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    • pp.87-97
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    • 2000
  • Signal optimization model is divided bandwidth-maximizing model and delay-minimizing model. Bandwidth-maximizing model express model formulation as MILP(Mixed Integer Linear Programming) and delay-minimizing model like TRANSYT-7F use "hill climbing" a1gorithm to optimize signal times. This study Proposed optimization model using genetic algorithm one of evolution algorithm breaking from existing optimization model This Proposed model were tested by several scenarios and evaluated through NETSIM with TRANSYT-7F\`s outputs. The result showed capability that can obtain superior solution.

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복합재료 바닥판 부재의 정적 및 피로거동에 관한 실험적 연구 (An Experimental Study of Fatigue and Static Behavior for Composite Deck Member)

  • 김영찬;박태영;김두환
    • 한국방재학회:학술대회논문집
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    • 한국방재학회 2007년도 정기총회 및 학술발표대회
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    • pp.479-482
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    • 2007
  • For making an application in construction parts of the composite material's complicated theory needs to accumulation of data by the help of study and experiment(demonstrate). Thus, this study is conducted research and analysis about the Influence of repeated loading cycles on Strength Ratio of the high quality material which is Carbon/Epoxy Composite Laminates through the test of tensile and fatigue Characteristics, based on it, construction engineers will can apply composite materials to construction technical without difficulty.

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사진용 경막제의 합성과 경막시험 (The Synthesis of Hardener for Photography and Hardening Test)

  • 김영찬
    • 한국응용과학기술학회지
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    • 제15권3호
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    • pp.33-37
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    • 1998
  • The hardening test of gelatin with 2,4-dichloro-6-hydroxy-1,3,5-triazine mono sodium salt was studied at pH 5, 7, 8 and about increasing temperature, respectively. The hardener was prepared by the reaction of cyanuric chloride with sodium hydroxide, disodium hydrogenphosphate-12-water and trisodium phosphate-12-water in the presence of water. The product was identified by elemental analyzer. IR spectrophotometer. Novel hardener can be used in photographic emulsion and showed very good hardening effect.

흡음형 소음기의 음향성능 해석 (Acoustic Performance Analysis of The Absorptive Mufflers)

  • 윤제원;김준호;김영찬;김두훈
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 1998년도 춘계학술대회논문집; 용평리조트 타워콘도, 21-22 May 1998
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    • pp.554-560
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    • 1998
  • Acoustic performance of the absorptive mufflers used in air-conditioning and ventilating ducts, gas turbines, industrial fans influenced by the design parameters such as the length of mufflers, lining thickness, properties of the acoustic lining, and so forth. So we predicted the acoustic performance according to the design parameters. For the analysis, we assumed the radial propagation constant is locally reacted to the acoustic lining, and analyzed the acoustic performance based on the plane wave theory by using four-pole parameters.

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수직입사 임피던스를 이용한 난입사 흡음율 예측 연구 (The study on the estimation of diffuse field absorption coefficient by using normal incidence impedance)

  • 유승국;김영찬;김두훈
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 1998년도 춘계학술대회논문집; 용평리조트 타워콘도, 21-22 May 1998
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    • pp.643-649
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    • 1998
  • This paper is to compare the absorption coefficient with normal incidence waves and it with diffuse incidence waves of glass wool which the most used absorption material and multi layer fiber. The absorption coefficient with normal incidence waves is calculated by surface impedance that measured by using an acoustic tube. Based on this data, the absorption. coefficient with diffuse incidence waves is predicted and is compared with measured the absorption coefficient in reverberation room.

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Cyan Coupler 중간체의 합성과 발색현상에 관한 연구 (Studies on the Synthesis of Intermediate Cyan Coupler and Color Development)

  • 김영찬;손병청
    • 한국응용과학기술학회지
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    • 제13권3호
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    • pp.35-41
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    • 1996
  • In this paper, intermediate cyan coupler was prepared by the reaction of 2-nitro-4, 6-dichloro-5-methylphenol with Pd(5wt%). The product was identified by using various analytical tools such as melting point, elemental analyzer, IR spectrophotometer and mass spectrometer. The reaction of intermediate cyan coupler with CD-3(color development agent) was shown cyan color.

고속도로시스템의 정주기식 램프미터링을 위한 최적화모형의 개발 (Developement of an Optimization Model for Freeway Entrance-Ramp Metering)

  • 김영찬;빈미영
    • 대한교통학회지
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    • 제13권4호
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    • pp.117-132
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    • 1995
  • Peak-period congestion is a frequent occurrence on many freeways. Entrance-metering is an effective strategey in improving urban freeway traffic condition. This paper describes the prodecure to develop a computer program for proparing optimum ramp-metering stategies. Four existing ramp-metering optimaization models wer reviewed and evaluated in regared to their theories and actural performances. A optimization model was proposed in this paper. Final model takes aform of quadratic programming. The performance of the propeosed model wastest using FREFLO.

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