• Title/Summary/Keyword: mixed system

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Evaluation of Appearance Capacity of Fabrics for Men's Suit by FAST System (FAST 시스템에 의한 신사복지의 외관성능 평가)

  • Kim, Jung-Sook
    • Fashion & Textile Research Journal
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    • v.8 no.5
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    • pp.591-596
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    • 2006
  • In order to analyze the tailorbility of different fabrics for men's suit, FAST system has been used for measuring the distribution of mechanical properties in this study. As results, cashmere mixed woolen fabrics showed the minimum degree in relaxation shrinkage, formability, and shear rigidity than any other fabrics, and also showed more than 6% as maximum level of extensibility. Thus, cashmere mixed woolen fabrics requires careful tailoring in lay-out, marking, and cutting. It is necessary to establish new tailoring criteria for automatic sewing with cashmere mixed woolen fabrics than any other fabrics, because they show more failure rate of tailorbility. There have been noticeably more variation of shrinkage and extension for woolen fabrics with cashmere mixed than 100% woolen fabrics by evaluating the formability of the suits when these are completed to suits through cutting and tailoring from fabrics. Especially nylon mixed woolen fabrics showed shrinkage overall, but polyester mixed woolen fabrics showed extension at waist area. Thus, it is necessary to adjust the appropriate overfeed rate considering the amount of shrinkage and extension while tailoring.

A Study on Numerical Analysis of Flow Uniformity According to Length and Degree Change of Mixed-Evaporator in 500 PS SCR Reactor (500 PS SCR 반응기 혼합증발관 길이와 각도 변화에 따른 유동균일도에 대한 수치해석적 연구)

  • Seong, Hongseok;Lee, Chungho;Suh, Jeongse
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.28 no.8
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    • pp.337-342
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    • 2016
  • A marine SCR System is emerging as an alternative to comply with NOx Tier III Emission standards, a restriction on greenhouse gas from vessels implemented by the International Maritime Organization. The system is greatly affected by the uniformity of the fluid flowing into the catalyst, so the performance of the catalyst of an SCR system needs to be guaranteed. This study conducted research on a mixed evaporator of an SCR system, which is one of the factors affecting the uniformity of the fluid. When the angle of the mixed evaporator is set to $90^{\circ}$, the fluid uniformity is at its highest at 83%, under the condition that the length of the mixed evaporator be 3.5 D. When the length was 3.5 D and less, the fluid uniformity had a tendency to improve relative to the case without a bent pipe. However, a longer mixed evaporator results in a more perfect liquidity development in the pipe with a liquidity distribution similar to the case where no curved pipe is formed in front of the catalyst. A lower angle for the mixed evaporator results in a lower flow uniformity, and a longer length of the mixed evaporator results in a lower difference in the flow uniformity caused by the angle. The flow uniformity can be improved by 6% with a mixed evaporator, which confirmed that all factors applied to an SCR system have a close relationship with the efficiency.

ASYMPTOTIC STUDY OF MIXED ROTATING MHD SYSTEM

  • Selmi, Ridha
    • Bulletin of the Korean Mathematical Society
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    • v.47 no.2
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    • pp.231-249
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    • 2010
  • Asymptotic behavior of three-dimensional mixed, periodic and rotating magnetohydrodynamic system is investigated as the Rossby number goes to zero. The system presents the difficulty to be singular and mixed, that is hyperbolic in the vertical direction and parabolic in the horizontal one. The divergence free condition and the spectral properties of the penalization operator are crucial in the proofs. The main tools are the energy method, the Schochet's method and products laws in anisotropic Sobolev spaces.

Evaluation of energy efficiency ratio in the mixed air conditioner system (혼합 공조 시스템의 EER(A) 평가)

  • 김병순;이승홍
    • Korean Journal of Air-Conditioning and Refrigeration Engineering
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    • v.11 no.4
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    • pp.542-548
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    • 1999
  • Instead of testing split air conditioners, an empirically based calculation procedure may be used to estimate the Energy Efficiency Ratio at ARI A test conditions. Typically, the system involving the indoor unit well sold and the given outdoor unit is called the matched system. All other systems involving a given outdoor unit and other indoor units are called the mixed systems. To estimate the EER(A) for the mixed systems, EER(A) for the matched system must be known, Generally, the EER(A) for the matched system is known. This procedure relies on independent measurements and calculations made on an outdoor unit in conjunction with a matched indoor and a mixed indoor coil. A heat pump simulation model was used to quantify the effects of individual system components on the system performance. The procedure is applicable to all air-conditioning units having rated cooling capacities less than 19,000W and charged with refrigerant 22.

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THE RIEMANN PROBLEM FOR A SYSTEM OF CONSERVATION LAWS OF MIXED TYPE (II)

  • Lee, Choon-Ho
    • Communications of the Korean Mathematical Society
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    • v.13 no.1
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    • pp.37-59
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    • 1998
  • We prove that solutions $u^\epsilon$ for the mixed hyperbolic-elliptic system of conservation laws with the viscosity term are total variation bounded uniformly in $\epsilon$ and that the solution $u^\epsilon$ converges to the solution for the mixed hyperbolic-elliptic Riemann problem as $\epsilon \to 0$.

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A NEW SYSTEM OF GENERALIZED NONLINEAR MIXED QUASIVARIATIONAL INEQUALITIES AND ITERATIVE ALGORITHMS IN HILBERT SPACES

  • Kim, Jong-Kyu;Kim, Kyung-Soo
    • Journal of the Korean Mathematical Society
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    • v.44 no.4
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    • pp.823-834
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    • 2007
  • We introduce a new system of generalized nonlinear mixed quasivariational inequalities and prove the existence and uniqueness of the solution for the system in Hilbert spaces. The main result of this paper is an extension and improvement of the well-known corresponding results in Kim-Kim [16], Noor [21]-[23] and Verma [24]-[26].

The effect of an EML sequence and an interlayer on the performance of the phosphorescent-fluorescent mixed WOLEDs

  • Baek, Heume-Il;Lee, Chang-Hee
    • 한국정보디스플레이학회:학술대회논문집
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    • 2008.10a
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    • pp.1215-1218
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    • 2008
  • We investigate the effect of a light emitting layer (EML) sequence and an interlayer on the performance of the phosphorescent-fluorescent mixed white organic light emitting diodes. Two types of phosphorescent-fluorescent mixed system were evaluated. The proper position of each primary color EML was crucial to obtain best performance in each system whereas the effect of an interlayer was found to be different in both systems.

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Building Mixed Reality System for a VR Flight Simulator (비행 VR 시뮬레이터를 위한 혼합 현실 환경의 구축)

  • 이종환;한순흥
    • Journal of the Korea Society for Simulation
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    • v.13 no.2
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    • pp.45-52
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    • 2004
  • This paper presents a prototype visualization system of mixed reality for a VR flight simulator. The chroma key technique is used to build the mixed reality model for a VR flight simulator. The Daedeok science town can be visualized in real time according to the rider control. He can also see his own hand/foot operating the control stick/rudder as well as virtual environment projected to the blue-screen using a video-see-through HMD.

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A Study on the Mixed Ownership Reform in Vocational Colleges in China (중국 전문대학의 혼합소유제 개혁에 관한 연구)

  • Zhao, Yuan;Lin, Ling;Li, Tao
    • Journal of Digital Convergence
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    • v.20 no.1
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    • pp.87-94
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    • 2022
  • The reform of the mixed ownership system of vocational colleges in China is an important driving force in the development of vocational education. The purpose of this study is to discuss the operation direction of the reorganization of the mixed ownership system of vocational colleges at this stage in accordance with the guidelines for vocational education reform in China. Therefore, this study analyzed the necessity and existing problems of reforming the mixed ownership system of vocational colleges using literature research methods. As a result of the study, it was found that the reform of the mixed ownership system of vocational colleges should be continuously developed by preparing measures in terms of legal support, providing incentives, and improving the evaluation system. This study has academic and practical significance in that it suggests the need to reform the mixed ownership system of Chinese vocational colleges, analyzes problems, and prepares policy measures.

Robust controller design for RTP system using weighted mixed sensitivity minimization (하중 혼합감도함수를 이용한 RTP 시스템의 견실제어기 설계)

  • 이상경;오도창;박홍배
    • 제어로봇시스템학회:학술대회논문집
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    • 1997.10a
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    • pp.434-437
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    • 1997
  • In this paper, we present an $H^{\infty}$ controller design of RTP system satisfying robust stability and performance using weighted mixed sensitivity minimization. In industrial fields, RTP system is widely used for improving the oxidation and the annealing in semiconductor manufacturing process. The main control factors are temperature control of wafer and uniformity in the wafer. The control of temperature and uniformity has been solved by PI control method. We improve robust stability and performance of RTP system by the design of $H^{\infty}$ controller using the weighted mixed sensivity function. An example is proposed to show the validity of proposed method.d.

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