• 제목/요약/키워드: regenerative process

검색결과 140건 처리시간 0.031초

REGENERATIVE BOOTSTRAP FOR SIMULATION OUTPUT ANALYSIS

  • Kim, Yun-Bae
    • 한국시뮬레이션학회:학술대회논문집
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    • 한국시뮬레이션학회 2001년도 춘계 학술대회 논문집
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    • pp.169-169
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    • 2001
  • With the aid of fast computing power, resampling techniques are being introduced for simulation output analysis (SOA). Autocorrelation among the output from discrete-event simulation prohibit the direct application of resampling schemes (Threshold bootstrap, Binary bootstrap, Stationary bootstrap, etc) extend its usage to time-series data such as simulation output. We present a new method for inference from a regenerative process, regenerative bootstrap, that equals or exceeds the performance of classical regenerative method and approximation regeneration techniques. Regenerative bootstrap saves computation time and overcomes the problem of scarce regeneration cycles. Computational results are provided using M/M/1 model.

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Some properties of the regenerative process

  • Shim, Donghee
    • 경영과학
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    • 제14권2호
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    • pp.63-68
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    • 1997
  • Limiting probability in the steady state of regenerative process is one of the most useful characteristics. The formula for this limiting probability in the steady state of the regenerative process is presented in this paper. Because this formula is for the general model, it can be applied to many special systems including 2-unit redundant system. An example for this formula is also presented.

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Genetic Reprogramming after Somatic Cell cloning

  • Tian, X.Cindy;Xu, Jie;Xue, Fei;Kubota, Chikara;Du, Fuliang;Yang, Xiangzhong
    • 한국수정란이식학회:학술대회논문집
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    • 한국수정란이식학회 2002년도 국제심포지엄
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    • pp.43-55
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    • 2002
  • Cloning by nuclear transfer in mammals using somatic cells has enormous potential applications. However, somatic cloning has been inefficient in all species in which NT is successful. High abortion and fetal death rates have been observed. These developmental defects have been attributed to incomplete nuclear reprogramming by the somatic cloning process. In this review, we will discuss studies conducted in our labs to understand the nuclear reprogramming process.

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재생프로세스에서 기대방문횟수에 대한 연구 (Expected Number of Visits of the Regenerative Process)

  • 심동희
    • 한국경영과학회지
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    • 제25권3호
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    • pp.35-39
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    • 2000
  • Expected number of visits in the steady state of the regenerative process is one of the most useful characteristics. The formula for this expected number of visits in the steady state of the regenerative process is presented in this paper. Because this formula is for the general model, it can be applied to many special systems including 2-unit redundant system. An example for this formula is also presented.

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심근에 작용하는 수종 약물이 쥐의 심근의 'Regenerative $Ca^{++}$ Release'에 미치는 영향 (Effects of Several Cardioactive Agents on the Regenerative $Ca^{++}$ Release in the Mechanically Disrupted Cardiac cells)

  • 강두희;이중우
    • The Korean Journal of Physiology
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    • 제11권2호
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    • pp.9-16
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    • 1977
  • The present experiment was conducted to see whether or not several cardioactive agents influence the 'regenerative $Ca^{++}$ release' in the mechanically disrupted cardiac cells. The mechanically disrupted cardiac cells were prepared by the method of Kerrick and Best from the ventricle of rat. The tension development of the disrupted cardiac cells was measured with a mechanoelectric transducer (RCA 5734). The results were summarized as follows 1) 2 mM caffeine enhanced the regenerative $Ca^{++}$ release, whereas 2 mM Procaine inhibited the $Ca^{++}$ release as reported by other investigators. 2) Epinephrine at concentrations of $10^{-7},\;10^{-6}\;and\;10^{-5}M$ increased the regenerative $Ca^{++}$ release significantly but showed a poor dose response on the $Ca^{++}$ release. 3) Propranolol showed no effect on the regenerative $Ca^{++}$ release when studied alone. Furthermore, it showed no antagonistic effect on an increased regenerative $Ca^{++}$ release induced by epinephrine. 4) Other cardioactive agents such as acetylcholine, ouabain, isoproterenol and c-AMP at concentrations of $10^{-6}M$ showed no effect on the regenerative $Ca^{++}$ release. From the above results, it may be concluded that the cardioactive actions of these agents are not related directly to the process of regenerative $Ca^{++}$ release.

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전문가 시스템소프트웨어 유지 보수에 있어서 프레임워크에 관한 연구 (The study on frame work of developing and modification with expert system program software)

  • Chang-Duck Jung
    • 한국컴퓨터산업학회논문지
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    • 제5권4호
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    • pp.503-510
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    • 2004
  • 이 논문은 모듈 프로그램 안에서 전문가 시스템 소프트웨어 유지 보수에 관한 기존 논문을 분석하고 건설 라인 공정의 문제점을 표준 시스템을 적용, 전문가 시스템으로 해결하는 과정에서 전문가 시스템 소프트웨어 프로그램의 재생성 모듈을 기술하였다. 끝으로 CES(Construction Expert System)라는 프로그램 타입 시스템을 적용 검증했고 전문가 시스템 소프트웨어 프로그램을 통해 대형 건설 과정의 유지 보수에 대한 프레임을 제시하였다.

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액체로켓 연소기 재생냉각형 노즐의 벌징 공정 개발 (Development of Bulging Process for Regenerative Cooling Nozzle of Liquid Rocket Thrust Chamber)

  • 류철성;최환석
    • 항공우주기술
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    • 제7권2호
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    • pp.103-109
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    • 2008
  • 액체로켓 연소기의 제작에 필수적인 재생냉각 노즐의 벌징공정에 대한 연구를 수행하였다. 벌징공정을 개발하기 위하여 벌징시험용 재료에 대한 인장시험을 수행하여 기계적인 물성 값들을 획득하였다. 벌징공정을 완료하기 위해서는 벌징치구가 2개 또는 3개 필요하였다. 재료의 네킹이 벌징공정에서 발생되는 주된 실패 원인이었으며, 재료의 그레인 사이즈가 이 네킹 발생에 큰 영향을 미침을 본 연구에서 나타났다. 그레인 사이즈를 조절한 재료로 현재 개발된 벌징공정을 이용하여 축소형 및 30톤 실물형 재생냉각 노즐의 제작을 성공적으로 수행함으로서 본 연구에서 개발된 벌징공정의 적용성 및 유용성을 보여주었다.

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'첨단재생의료 및 첨단바이오의약품 안전 및 지원에 관한 법률' 개정에 따른 '기관생명윤리위원회(Institutional Review Board)' 역할 및 '임상시험 및 대상자보호프로그램(Human Research Protections Program)' 강화의 중요성 (The Importance of Strengthening the Role of the Institutional Review Board and the Human Research Protections Program following the Revision of the Act on the Safety and Support of Advanced Regenerative Medicine and Advanced Biopharmaceuticals)

  • 김병수
    • 대한기관윤리심의기구협의회지
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    • 제6권1호
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    • pp.1-4
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    • 2024
  • The strengthening of Institutional Review Board (IRB) and Human Research Protection Program (HRPP) for clinical research on advanced regenerative medicine reflecting the 3 Principles of the Belmont Report (Respect, Beneficence, Justice) is very important. The research institution IRB should naturally be in charge of managing the clinical research process. And it is crucial to reinforce HRPP for the protection of research subjects in institutions conducting advanced regeneration clinical research. So, it is needed to establish a Protection System for Advanced Regenerative Medical Research Subjects composed of clinical research management communication system for advanced regenerative medicine between KAIRB (Korean Association of IRB) of research institutes and National Management Agency for Advanced Regenerative Medical Research. In advanced regenerative medicine clinical research to verify safety and efficacy of the investigational drugs to the subjects with rare and incurable diseases rather than to treat the patients, it is hoped that a management system that guarantees the scientific characteristics of research and the rights of research subjects would be well organized and operated.

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재생 입구 직접증발냉각기 적용이 제습냉방시스템 성능에 미치는 영향 (Effects of performance analysis of a desiccant cooling system with a direct evaporative cooler in the regeneration process)

  • 다쉬울찌우타스;오명도
    • 대한설비공학회:학술대회논문집
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    • 대한설비공학회 2009년도 하계학술발표대회 논문집
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    • pp.633-638
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    • 2009
  • In this study the performance analysis and cooling capacity of desiccant cooling system incorporating regenerative cooler and direct evaporative cooler in the regeneration air inlet were investigated on the condition of low regeneration temperature and time rotation 180s and area ratio of regeneration to dehumidification section 0.7. The cooling capacity and COP are evaluated at various effectiveness values of the direct evaporative cooler or the regenerative evaporative cooler. As either of effectiveness of the regenerative and direct evaporative coolers of desiccant cooling system increases, both the cooling capacity and COP increase, but effectiveness value of regenerative cooler gives the opposite effect on the system performance. It is found that effectiveness of regenerative cooler less than 0.7 shows the optimum cooling capacity.

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Maximum Power Recovery of Regenerative Braking in Electric Vehicles Based on Switched Reluctance Drive

  • Namazi, Mohammad Masoud;Saghaiannejad, Seyed Morteza;Rashidi, Amir;Ahn, Jin-Woo
    • Journal of Electrical Engineering and Technology
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    • 제13권2호
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    • pp.800-811
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    • 2018
  • This paper presents a regenerative braking control scheme for Switched Reluctance Machine (SRM) drive in Electric Vehicles (EVs). The main purpose is to maximize the recovered energy during battery charging by taking into account the nonlinear physical characteristics of the Switched Reluctance Machine. The proposed regenerative braking method employs the back-EMF in the generation process as a complicated position-dependent voltage source. The proposed maximum power recovery (MPR) operation of the regenerative braking is first based on the maximization of the extracted power from the machine and then the maximization of the power transferred to the battery. The maximum power extraction (MPE) from SRM is based on maximizing the energy conversion ratio by the calculation of the optimum PWM switching duty cycle, turn-on, and turn-off angles. By using the impedance matching theorem that allows the maximum power transfer (MPT) of the MPE, the proposed MPR is achieved. The parametric averaged value modeling of the machine phase currents in the chopping control mode is used for MPR realization. By following this model, a nonlinear equivalent input resistance is derived for the battery internal resistance matching. The effectiveness of the proposed regenerative braking method is demonstrated through simulation results and experimental implementation.