• 제목/요약/키워드: Branches

검색결과 2,223건 처리시간 0.032초

끝단질량을 갖는 송수관의 고유치 분기와 플러터 모드 (Eigenvalue Branches and Flutter Modes of Pipes with a Tip Mass Conveying Fluid)

  • 류봉조;류시웅;빈산길언;임경빈
    • 한국소음진동공학회:학술대회논문집
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    • 한국소음진동공학회 2003년도 춘계학술대회논문집
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    • pp.665-669
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    • 2003
  • The paper deals with the relationship between the eigenvalue branches and the corresponding flutter modes of cantilevered pipes with a tip mass conveying fluid. Governing equations of motion are derived by extended Hamilton's principle, and the numerical scheme using finite element method is applied to obtain the discretized equations. The order of branches and unstable modes associated with flutter are defined in the stability maps of mass ratios of the pipe and the critical flow velocity. As a result, the relationship between the flutter related to the eigenvalue branches and the flutter modes are investigated thoroughly.

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안전공급계획에 따른 판매지점들의 협조공급수준 분석 (An Analysis of Cooperation Service Level using Safety Shipment Plan)

  • 윤승철;민지영
    • 대한안전경영과학회지
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    • 제8권2호
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    • pp.115-128
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    • 2006
  • The study analyzes those relations of customer service level of each sales branch, level of cooperations among branches, and overall system-wide service level for an item. Under the continuous review method, each sales branch places an order to the outside supplier, and the each branch receives the order quantity after elapsing a certain lead time. Under these circumstances, those branches with stockout condition may be supplied by other branches with keeping stocks to cover the shortages. This policy generally increases the system-wide customer service level for an item throughout cooperations for the safety plan among branches. Therefore, in the context of inventory policy, the decision rules to determine the proper branch levels of service and cooperation levels of service are important goals in terms of attaining desired system-wide service level. This research has suggested the method and procedure to reach above goals.

병렬구조 컴퓨터에서 Branch penalty를 감소시키기 위한 소프트웨어와 하드웨어 방법 (A Software And Hardware Scheme For Reducing The Branch Penalty In Parallel Computers)

  • 함찬숙;조종현;조영일
    • 전자공학회논문지B
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    • 제30B권11호
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    • pp.11-16
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    • 1993
  • VLIW architecture capable of testing multiple conditions in a cycle must support an efficient mechanism for multi-way branches. This paper proposes a mechanism to speed up the execution of multi-way branches and an efficient memory packing method of instructions, which reduced the wasted memory space. Also, we develops a new compiler technique which can transform program segments that are not applied to multi-way branches into ones that are applied to multi-way branches. The benefits gained by the transformation are to reduce branch penalty and to increase instruction-level parallelism.

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한국산 홍조 산호밀과 애기산호말속 (Jania) 식물에 대한 분류학적 검토 (Taxonomic Accounts of Jania (Rhodophyta, Corallinaceae) in Korea)

  • 최도성
    • Journal of Plant Biology
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    • 제36권2호
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    • pp.151-157
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    • 1993
  • Taxonomic accounts are given to four species of Jania, Rhodophyta from Korea; J. adhaerens Lamouroux, J. nipponica (Yendo) Yendo, J. radiata (Yendo) Yendo and J. yenoshimensis (Yendo) Yendo. J. adhaerens is an epiphyte and characterized by massive tufts with decussate-dichotomous branches. J. nipponica growing on the rocks is different from other plants by erect tuft with low-angle dichotomous branches. J. radiata has a small epiphytic thallus (5 mm) and flat, flabellate-dichotomous branches. And J. yenoshimensis grows on the rocks in sublittoral regions and has compressed, fastigate, regular-dichotomous branches. This species is distinguished form others by the formation of slender moniliform branchlets. Among these, J. yenoshimensis is first reported in Korea in this study.

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금융환경 변화에 따른 은행의 실내공간 변화에 관한 연구 - A은행 충청지역 지점 사례를 중심으로 - (A Study on the Modifications of the Interior of Bank Branches due to the Financial Conditions - Case of 'A' Bank Branches in Chung-Cheong Province -)

  • 소은탁;송병하
    • 한국실내디자인학회논문집
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    • 제18권6호
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    • pp.211-220
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    • 2009
  • In this study, the modifications of the interior of bank branches that caused by the banking strategy, as well as customers' behavior, since the financial crisis in the late '90s, are investigated. By selecting and analysing the aspects of remodeling of twelve(12) branches in the Chung-Cheong area, the study finds a certain pattern in the changes as follows: 1) the area of counseling, including 'private banking' is increased while conventional customer service area is substantially decreased. 2) Combined with ATM, high-counter area is functionally separated from low-counter in order to provide more expeditious service. 3) Due to the lack of space of newly furnished 'quick' service area that is located near the entrance of the bank, entering / exiting possibly becomes agitating experience for customers. More accurate estimation of traffic, and appropriate space should be allocated in planning the area.

Estimation of Discharge for the Amazon River Branches with Wavelet Analysis

  • Katabira, Kyoichiro;Ogawa, Susumu;Sakurai, Takako;Takagi, Mikio
    • 대한원격탐사학회:학술대회논문집
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    • 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
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    • pp.346-348
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    • 2003
  • In this study, we attempted to estimate the discharge of the Amazon River branches from JERS-1/SAR images, which are independent of the weather. We visualized some traces of the Amazon River branches, transformed river shapes into a one-dimensional signal, and calculated the characteristics of the river shapes such as the meandering wavelength and the amplitude with Fourier and wavelet analysis. Then, we related the characteristics of the river shapes with the existing discharge data and derived some regression equations. Finally, we estimated the discharge of the Amazon River branches from the SAR images.

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냉매의 불균일한 분배가 증발기의 성능에 미치는 영향 (Effects on Refrigerant Maldistribution on the Performance of Evaporator)

  • 김창덕;이진호
    • 설비공학논문집
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    • 제16권3호
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    • pp.230-240
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    • 2004
  • An experimental investigation was conducted to study two-phase flow distribution in a T-type distributor of slit fin-and-tube heat exchanger using R22. A comparison was made between the predictions by previously proposed tube-by-tube method and experimental data for the heat transfer rate of evaporator. Experiments were carried out under the conditions of saturation temperature of 5$^{\circ}C$ and mass flow rate varying from 0.6 to 1.2kg/min. The inlet air has dry bulb temperature of 27$^{\circ}C$, relative humidity of 50% and air velocity varying from 0.63 to 1.71㎧. Experiment show that air velocity increased by 85.2% is need for T-type distributor with four outlet branches than that of two outlet branches under the superheat of 5$^{\circ}C$, which resulted in air-side pressure drop increase of 130% for T-type distributor with four outlet branches as compared to two outlet branches.

Soft-Switching T-Type Multilevel Inverter

  • Chen, Tianyu;Narimani, Mehdi
    • Journal of Power Electronics
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    • 제19권5호
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    • pp.1182-1192
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    • 2019
  • In order to improve the conversion efficiency and mitigate the EMI problem of conventional hard-switching inverters, a new soft-switching DC-AC inverter with a compact structure and a low modulation complexity is proposed in this paper. In the proposed structure, resonant inductors are connected in series for the arm branches, and resonant capacitors are connected in parallel for the neutral point branches. With the help of resonant components, the proposed structure achieves zero-current switching on the arm branches and zero-voltage switching on the neutral point branches. When compared with state-of-art soft-switching topologies, the proposed topology does not need auxiliary switches. Moreover, the commutation algorithm to realize soft-switching can be easily implemented. In this paper, the principle of the resonant operation of the proposed soft-switching converter is presented and its performance is verified through simulation studies. The feasibility of the proposed inverter is evaluated experimentally with a 2.4-kW prototype.

Peripheral nerve blocks for acute trigeminal neuralgia involving maxillary and mandibular branches: a case report

  • Ricardo Luiz de Barreto Aranha;Renata Goncalves Resende;Fernando Antonio de Souza
    • Journal of Dental Anesthesia and Pain Medicine
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    • 제23권6호
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    • pp.357-362
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    • 2023
  • Trigeminal neuralgia (TN) is neuropathic pain that affects the trigeminal nerve branches. Facial pain experienced by patients with TN is typically intense and excruciating. The second and third branches (maxillary and mandibular) are commonly affected. This case report focuses on the potential treatment options for acute TN attacks involving these branches. The proposed approach involves extra-oral peripheral blocks using local anesthetics. Pain levels were measured using a visual numeric scale (VNS) with potential side effects and other relevant documented information. The patients showed responses from high pain levels to almost complete remission (from 8 to 2 and from 10 to 2 on the final VNS), with no significant side effects. This technique provides immediate pain relief and complements oral medications by offering comfort and confidence until the desired drug effect is achieved.