• 제목/요약/키워드: Optimized Location

검색결과 269건 처리시간 0.026초

노즐 형상과 기판의 위치 변화가 초음속 유동에 미치는 영향에 관한 수치해석 연구 (Numerical study on the effects of nozzle geometry and substrate location in the supersonic flow)

  • 박정재;윤석구;김호영
    • 한국신재생에너지학회:학술대회논문집
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    • 한국신재생에너지학회 2010년도 춘계학술대회 초록집
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    • pp.58.2-58.2
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    • 2010
  • This paper deals with the simulation of solid particle coating technology via supersonic nozzle in vacuum environment to devote as an aerosol-deposition device. In order to improve efficiencies of nozzle and coating process, effects of shockwave, nozzle geometry, and substrate location were studied computationally under a fixed chamber pressure of 0.01316 bar which is nearly vacuous. Shockwave is the important factor affect to entire flow because shockwave in the jet flow dissipates the kinetic energy of the flow in the supersonic condition. Results show that various nozzle geometries have significant effect on the supersonic flow and we know that the supersonic nozzle should be optimized to minimize the loss of the flow. Another parameter, the distance between substrate and nozzle tip, shows little effect in this study.

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파이버 레이저를 이용한 밸로우즈 용접특성에 관한연구 (Welding characteristics of Metal bellows using a Fiber laser)

  • 김정오;이제훈;이승우
    • 한국레이저가공학회지
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    • 제16권3호
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    • pp.22-26
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    • 2013
  • Fiber laser welding was performed on SUS Materials metal bellows. The results can be summarized as follows: When we tried to change welding focus location. we get the best welding line when focus location placed 0mm. In product welding, We could make a satisfactory product in constant area by applying optimized conditions and show a table that is able to help producer easily to apply it to manufacturing. In comparison with existing TIG and plasma welding, welded bellows by fiber laser has faster processing speed, smaller thermal effect, very narrow welding area and fine surface.

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탄성 마운트 장착 디젤 발전기 세트의 진동 특성과 예방에 대한 연구 (Vibration characteristics of diesel generator set with resilient mount and prevention of vibration on the design stage)

  • 이군희;배종국;이수목
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2005년도 춘계학술대회논문집
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    • pp.921-924
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    • 2005
  • Diesel generator sets with resilient mounts often experience resonances by major excitations which come from diesel engine and their foundation with rigid body modes. Because their natural frequency is determined by moment of inertia and stiffness of resilient mount vibration problems are resolved by changing location and stiffness of resilient mounts. But the calculated natural frequencies are inaccurate due to uncertainty of the inertia and mount stiffness. So this result can be useless on the design stage. In this paper, the stiffness of mount is evaluated on result from mount stiffness test in laboratory and generator set vibration test and a simple calculation method for moment of inertia is proposed. Based on these data, the procedure to select optimized mount stiffness and location on the design stage is set up.

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Optimal Design for CLIP EPDM Rubber Products using a Flow Analysis

  • Huh, Young-Min;Lee, Kwang-O;Kang, Sung-Soo
    • International Journal of Precision Engineering and Manufacturing
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    • 제7권4호
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    • pp.23-27
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    • 2006
  • Rubber is used in many industrial products, such as hoses, rubber belts, and oil seals. In particular, more than 200 rubber parts are used in automobiles. The design technology of these parts is largely dependent on field experience, which leads to lengthy and expensive developing procedures. However, with the help of recent developments in nonlinear computer analysis, new rubber products can be developed at low cost. In this study, rubber injection molding design variables, such as location and number of gates, were optimized using computer-aided engineering with the cross-WLF equation to produce CLIP rubber products made from ethylene propylene diene monomer(EPDM). The validity of the proposed design was evaluated by comparison with actual forming results.

지그비를 이용한 모바일정보 시스템 (Mobile Information System using Zigbee Technology)

  • 박세현;구교민;하경주
    • 한국산업정보학회논문지
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    • 제19권2호
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    • pp.67-72
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    • 2014
  • 지그비는 무선 센서 네트워크 상에 최적화된 무선통신기술이다. 이러한 지그비를 기반으로 위치인식 시스템에 활용되고 있다. 본 논문에서는 ZigBee를 이용한 모바일 정보 시스템을 구현한다. 구현된 시스템은 모바일 단말기용 소프트웨어 개발과 리더기용 소프트웨어로 구분된다. 이를 활용하는 하드웨어 기술은 기 개발된 시스템을 활용하였다.

터널브라킷 애자류 오염도 분석에 관한 연구 (A research on the Tunnel bracket insulator pollution characteristic in Korea Railroad)

  • 전용주;류영태;박영식;박기범;이태훈
    • 한국철도학회:학술대회논문집
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    • 한국철도학회 2009년도 춘계학술대회 논문집
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    • pp.1963-1969
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    • 2009
  • This paper introduces method to estimate pollutant negative influence to polymer type insulator according to the international standard. To accomplish this goal, effective sample collecting method was surface was collected directly with the same dimension. Distilled Through this method pollute is easily and accurately collected. The second step is pollutant analysis. Several analyze item is selected such as quantity, conductivity, contact angle, Optical Microscope(OM), IR spectrometer(FT-IR), Equivalent Salt Deposit Density(ESDD), Thermal Analyzer(TA) and ICP-AES. The third step, best represent tunnel was selected considering location, length and natural surroundings. Also to consider the difference at inside the tunnel, several bracket insulators were selected along to the location. To make the result precise, above procedure was repeated several times at the same target. Finally relation among type of train, numbers of movement, surroundings, length will be considered in combination with the pollution. With this result pollute map for KORAIL could be accomplished and inspect period will be optimized case by case.

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부분 중계기 협력 다중화 기술에서 동적 최적 시간 할당 기술 (A Dynamic Optimum Time Allocation Method in Partial Relay Systems)

  • 조정일;권양수;김남리;정재학
    • 한국통신학회논문지
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    • 제34권10A호
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    • pp.746-751
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    • 2009
  • 본 논문에서는 부분 중계기 협력 다중화 기술에서 중계기의 위치에 따른 최적의 시스템 용량을 얻기 위한 동적 최적 시간 할당 기법을 제안하였다. 제안된 기법은 중계기 시스템의 전송 조건식을 추가함으로써 중계기의 유동적인 위치에 따라 최대의 시스템 용량을 가지도록 각 시간 구간의 길이를 최적화하였다. 전산 모의실험을 통해 균일하게 고정된 시간 할당을 가지는 기존의 부분 중계기 협력 다중화 기술에 비해 향상된 시스템 용량을 얻을 수 있었다.

A Study on the Effective Marketing Implementation through Face Recognition Technology in Smart Digital Signage

  • Cha, jin-gil;Kim, Seong-Kweon
    • International journal of advanced smart convergence
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    • 제11권3호
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    • pp.72-78
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    • 2022
  • The aim of this research is to improve the effectiveness of digital media advertising because current advertisements -in digital signage - indiscriminately appeals to the general public rather than to a specific target. In order to deliver efficient and customized advertisement information, an IoT human body detection sensor mounted on digital signage detected human faces and then classified them firstly by gender. The digital signage here is a smart digital signage that can analyze facial signals, discriminate them based on patterns, and apply the extracted data by displaying the corresponding information to the user. In addition, by identifying the customer's location approaching the smart digital signage and displaying the optimized content information for the customer's location through an algorithm, the digital signage can dramatize the advertisement Thus, this is a study meant forimproving information efficiency while reducing noise and driving power waste generated from unnecessary digital information reproduction.

Building Smarter City through Big Data - Best Practices in Seoul Metropolitan Gov.

  • Kim, Ki-Byoung
    • 국제학술발표논문집
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    • The 6th International Conference on Construction Engineering and Project Management
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    • pp.19-20
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    • 2015
  • Since 2013, Seoul Metropolitan Government (SMG) has introduced big data initiatively in administration and put into practices in transportation, safety, welfare in order to overcome limited resources and conflicting interests. For establishing a new midnight bus service, SMG prepared optimized midnight bus routes by analyzing big data from mobile phone Call Data Record (CDR) through collaboration with a telecommunication company. Despite of limited budget and resources, newly identified routes can cover over 42% of the citizen with 9 routes and less than 1% of buses compare with day time operation. In addition to solve transportation problem, SMG utilizes big data to resolve location selection problem for choosing new facility locations such as life double cropping centers and senior citizen leisure centers. As results, SMG demonstrates big data as a good tool to make policies and to build smarter city by overcome space-time limitation of resources, mediation of conflicts, and maximizes benefit of the citizen.

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Personalized Recommendation Algorithm of Interior Design Style Based on Local Social Network

  • Guohui Fan;Chen Guo
    • Journal of Information Processing Systems
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    • 제19권5호
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    • pp.576-589
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    • 2023
  • To upgrade home style recommendations and user satisfaction, this paper proposes a personalized and optimized recommendation algorithm for interior design style based on local social network, which includes data acquisition by three-dimensional (3D) model, home-style feature definition, and style association mining. Through the analysis of user behaviors, the user interest model is established accordingly. Combined with the location-based social network of association rule mining algorithm, the association analysis of the 3D model dataset of interior design style is carried out, so as to get relevant home-style recommendations. The experimental results show that the proposed algorithm can complete effective analysis of 3D interior home style with the recommendation accuracy of 82% and the recommendation time of 1.1 minutes, which indicates excellent application effect.