• 제목/요약/키워드: co-design

검색결과 7,457건 처리시간 0.034초

유조선의 구획배치 자동화 알고리즘 개발 (Development of Automated Algorithm for Compartment Arrangement of Oil Tanker)

  • 송하철;나승수;조두연;심천식;이강현;정솔;허주호;정태석;이철호;조영천;김동춘
    • 대한조선학회논문집
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    • 제50권1호
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    • pp.59-68
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    • 2013
  • Nowadays, optimum structural design techniques based on CSR have been developed and applied to the preliminary design stage focused on minimum weight and minimum construction cost of ship structure. Optimum structural design algorithm developed before could minimize weight and cost on fixed compartment arrangement. However, to develop more efficient design technique, a designer needs to combine optimized compartment arrangement with optimized ship structural design because compartment arrangement has a large effect on structural design according to the change of still water bending moment as a consequence of compartment arrangement change. In this study, automated algorithm for compartment arrangement of an oil tanker is developed to apply preliminary structural design. The usefulness of developed algorithm is verified with Aframax oil tanker constructed by STX shipbuilding Co.Ltd..

Comparison of Petaloid Bottom Design for Carbonated Soft Drink PET Bottle through Computer Simulation

  • Dong-Hae Choi;Kyeong Hoon Cho;Kyoung Woo Nam;Woo Min Kim;Baek Rim Yeon;Min-Young Lyu
    • Elastomers and Composites
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    • 제57권4호
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    • pp.205-214
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    • 2022
  • Research on reducing the thickness of polyethylene terephthalate (PET) bottles is necessary to reduce the amount of plastic used. However, as decreasing a PET bottle's thickness weakens it, a robust bottle design is required. Therefore, in this study, we numerically analyzed various bottom designs of a carbonated soft drink PET bottle with 245 and 500 ml capacities and complicated petaloid shapes. Deformation, equivalent stress, maximum principal stress, and its direction according to each design were analyzed to study the strength of the bottle. The results serve as a reference to design robust petaloid PET bottle bottoms with a reduced thickness for carbonated soft drinks.

Development of a BIM-based Carbon Dioxide Emission Estimation System -Focus on an Apartment in Korea-

  • Lee, Yong-Ju;Jun, Han-Jong
    • Architectural research
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    • 제18권4호
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    • pp.145-149
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    • 2016
  • Recently, a goal was set globally to reduce the Carbon Dioxide ($CO_2$) emission at national levels by 30 % in comparison to the Business As Usual (BAU) pursuant to the United Nations Framework Convention on Climate Change. As construction industry accounts for as high as 40 % of the $CO_2$ emission by the entire industrial sector in Korea, efforts toward reducing emissions from the construction industry are essential. Buildings are mainly responsible for $CO_2$ emissions, and, to reduce the $CO_2$ emitted from the buildings, a fast and accurate calculation method is required to be introduced in the architectural design phase. If the standardized data based on Building Information Modelling (BIM) is utilized, $CO_2$ emissions can be calculated quickly and accurately during the design phase. However, it is difficult for the designers who lack the knowledge regarding $CO_2$ emissions to reduce and manage such emission during the planning and design phases of buildings by estimating the quantities of various materials and the corresponding $CO_2$ emissions. Accordingly, the objective of this study is to develop a BIM-based $CO_2$ emission estimation system for a rapid and objective analysis and verification of $CO_2$ emissions.

염해 환경하의 철근콘크리트 구조물의 친환경 내구설계 시스템 개발에 관한 연구 (A Study on the Development of Sustainable Durability Design System for Reinforced Concrete Structure under Chloride Attack Environments)

  • 김낙현;노승준;태성호
    • KIEAE Journal
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    • 제11권4호
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    • pp.87-94
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    • 2011
  • This study was suggested to develop sustainable durability design system and proposed the plan to evaluate design conditions that meet the intended service life and $LCCO_{2}$ reduction level of reinforced concrete structure easily from the early design stage. For that the W/B and covering depth of the concrete structure were calculated through calculation of service life based on standard specification expression and the quantitative reduction rate of the vertical member of reinforced concrete structure by the calculated W/B was applied. Life cycle of building classified into construction stage, operation stage, maintenance stage, and demolition/disposal stage and the method of $CO_{2}$ evaluation of each stage was proposed. For construction stage, the major construction materials that take up over 80% $CO_{2}$ emitting during building construction were selected and the $CO_{2}$ evaluation method for 5 standard apartment houses was proposed. Also, for operation stage, $CO_{2}$ emission was calculated through calculation of heating load by energy efficiency rating certification system. For maintenance stage, $CO_{2}$ emission was calculated using concept of re-construction by life and for demolition/disposal stage was calculated with the use of construction standard estimate. As a result of the case study by such evaluation methods, 80 years of service life and 17 specifications of sustainable durability design that meet the 40% intended $LCCO_{2}$ reduction level were deduced. The Maximum $LCCO_{2}$ reduction rate was analyzed by 47.2%.

Challenge in the Structural Design of Suzhou IFS

  • Zhou, Jianlong;Huang, Yongqiang
    • 국제초고층학회논문집
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    • 제10권3호
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    • pp.165-171
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    • 2021
  • Core-outrigger-mega frame system is used in Suzhou IFS with 95-story, 450 m-tall, which is beyond Chinese code limit. Besides simple introduction on design principle, structure system and analysis, key techniques including performance based design criteria, frame shear ratio, capacity check of mega column, human comfort criteria under wind induced vibration and TSD design were presented in details for reference of similar super tall building design.

불투과형 사방댐에 대한 설계기준 분석 (Analysis of design method on closed-type erosion control dam)

  • 김운형;송병웅;김범석
    • 한국지반공학회:학술대회논문집
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    • 한국지반공학회 2010년도 춘계 학술발표회
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    • pp.911-920
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    • 2010
  • A closed-type erosion control dam were suggested as an effective method to protect from debris flow damages caused by seasonal rainstorm, typhoon, and local heavy rain. However, design method on a closed-type erosion control dam currently practiced in the engineering is not well established with respect to type of the dam, design parameters, maintenance and so forth. In this study, design parameters for closed-type erosion control dam were evaluated and the comparison of design parameters used in Korea and Japan was performed. Based on the results of this study, modification of design method for closed-type erosion control dam are recommended.

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Hinged Cross Bar 구조 최적 설계 (The Optimum Design of Hinged Cross Bar for Container Vessels)

  • 김명규;이동욱;문중용
    • 대한조선학회 특별논문집
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    • 대한조선학회 2008년도 특별논문집
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    • pp.29-32
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    • 2008
  • Hinged cross bar which is fitted for buyer's special item in cell guide of container vessels has an advantage of efficiency on container loading. In this paper, the main focus is to confirm the structural adequacy of hinged cross bar supporting structure in cell guide under the considered loading condition for container vessel.

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Numerical study on the design of urea decomposition chamber in LP SCR system

  • Um, Hyung Sik;Kim, Daehee;Kim, Keon Ho
    • International Journal of Naval Architecture and Ocean Engineering
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    • 제11권1호
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    • pp.307-313
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    • 2019
  • In order to design efficient Urea Decomposition Chamber (UDC) for the Low Pressure (LP) Selective Catalytic Reduction (SCR) system, numerical simulations were conducted with respect to various design parameters. The design parameters examined in this simulation include the chamber diameter, inlet and outlet shape of chamber, and urea injection point. Reaction kinetics for the urea decomposition was proposed and validated with the experimental data in the range of $300{\sim}450^{\circ}C$. The effects of design parameters on the performance of UDC were evaluated by the calculated urea conversion and pressure drop. As a result, the local optimum design values were derived by the parametric study.

Evaluation and Optimization of Resource Allocation among Multiple Networks

  • Meng, Dexiang;Zhang, Dongchen;Wang, Shoufeng;Xu, Xiaoyan;Yao, Wenwen
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • 제7권10호
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    • pp.2395-2410
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    • 2013
  • Many telecommunication operators around the world have multiple networks. The networks run by each operator are always of different generations, such as 2G and 3G or even 4G systems. Each system has unique characters and specified requirements for optimal operation. It brings about resource allocation problem among these networks for the operator, because the budget of each operator is limited. However, the evaluation of resource allocation among various networks under each operator is missing for long, not to mention resource allocation optimization. The operators are dying for an algorithm to end their blind resource allocation, and the Resource Allocation Optimization Algorithm for Multi-network Operator (RAOAMO) proposed in this paper is what the operators want. RAOAMO evaluates and optimizes resource allocation in the view of overall cost for each operator. It outputs a resource distribution target and corresponding optimization suggestion. Evaluation results show that RAOAMO helps operator save overall cost in various cases.