• 제목/요약/키워드: irregular

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일반 건축물의 이형벽체 최적설계기법 적용사례 (Application of Building using Optimal Design Technique of Irregular Wall)

  • 한경수;방중석
    • 한국건축시공학회:학술대회논문집
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    • 한국건축시공학회 2014년도 춘계 학술논문 발표대회
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    • pp.86-87
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    • 2014
  • Recently, construction project has greatly increased the needs for cost savings due to excessive competition and economic recession. The purpose of this study is to introduce application of building using optimal design technique for improving constructability and economic efficiency of structural wall. As a results, design results of irregular wall show about 15% reduction of the longitudinal bar compared to single walls and ultimately improve constructability.

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PROPAGATION OF SURFACE WAVES ON IRREGULAR BED TOPOGRAPHY

  • WARKE A. S.;DAS S. K.;DEBNATH L.
    • Journal of applied mathematics & informatics
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    • 제20권1_2호
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    • pp.197-208
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    • 2006
  • This paper deals with the exact solution of surface gravity waves in an ocean with irregular bed topography. In order to obtain water surface elevation and run-up of infra-gravity waves when the bed is either wavy or exponential, closed form solutions are obtained. Numerical computations indicate that when solitary wave or sinusoidal wave conditions are applied at the boundary, water surface elevation attains near Gaussian profile.

MULTI-SCALE DERIVATIVE OF IRREGULAR FUNCTIONS

  • Kim, Tae-Sik
    • Journal of applied mathematics & informatics
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    • 제13권1_2호
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    • pp.393-404
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    • 2003
  • In general, a differential operator can be used as a tool of treating the local properties of given function. However, when the given function is varied with high frequency and has irregular form with non-stationary evolution it may not act its role sufficiently as in case of nowhere differentiable curves. In this paper we introduce a multi-scale derivative as a form of weakened global derivative so that it may explain its semi global diffusion properties as well as local ones for the various irregular diffusion phenomena.

ROBUST FUZZY LINEAR REGRESSION BASED ON M-ESTIMATORS

  • SOHN BANG-YONG
    • Journal of applied mathematics & informatics
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    • 제18권1_2호
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    • pp.591-601
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    • 2005
  • The results of fuzzy linear regression are very sensitive to irregular data. When this points exist in a set of data, a fuzzy linear regression model can be incorrectly interpreted. The purpose of this paper is to detect irregular data and to propose robust fuzzy linear regression based on M-estimators with triangular fuzzy regression coefficients for crisp input-output data. Numerical example shows that irregular data can be detected by using the residuals based on M-estimators, and the proposed robust fuzzy linear regression is very resistant to this points.

Puncturing 기법을 이용한 UEP Irregular LDPC Code 설계 (Design of UEP Irregular LDPC Code Using Puncturing Scheme)

  • 김성원;최성훈;허준
    • 대한전자공학회:학술대회논문집
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    • 대한전자공학회 2006년도 하계종합학술대회
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    • pp.1051-1052
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    • 2006
  • In this paper, we propose a puncturing scheme to design low-density parity-matrix (LDPC) codes for unequal error protection (UEP). Two different puncturing schemes are compared. Simulation results show that proposed puncturing scheme outperforms regular puncturing scheme for more important bits. Future work is to find an optimized puncturing patten for UEP irregular LDPC codes.

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Internet Teleoperation of a Robot with Streaming Buffer System under Varying Time Delays

  • Park, J.H.;J. Kwon
    • 제어로봇시스템학회:학술대회논문집
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    • 제어로봇시스템학회 2001년도 ICCAS
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    • pp.82.1-82
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    • 2001
  • It is known that existence of irregular transmission time delay is a major bottleneck for application of advanced robot control schemes to internet telerobotic systems. In the internet teleoperation system, the irregular transmission time delay causes a critical problem, which is unstable and inaccurate. This paper suggests a practical internet teleoperation system with streaming buffer system, which consists of a buffer, a buffer manager, and a control timer. The proposed system converts the irregular transmission time delay to constant. So, the system effectively transmits the control input to a remote site to operate a robot stably and accurately. This feature enables short control input interval. That means the entire system has ...

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타원형 수중천퇴상의 규칙파 및 불규칙파의 전파변형 실험(I):비쇄파조건 (Experiments for Wave Transformation of Regular and Irregular Waves over a Submerged Elliptic Shoal(I) : Non-breaking Conditions)

  • 이종인;이정욱
    • 한국해안해양공학회지
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    • 제14권3호
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    • pp.240-246
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    • 2002
  • 타원형 천퇴해역에 대한 규칙파 및 일방향 불규칙파의 전파변형에 대한 수리모형실험을 수행하였다. 수리모형실험은 비쇄파조건의 규칙파와 천퇴의 정상부에서 부분쇄파가 발생하는 일방향 불규칙파를 대상으로 수행되었다. 수리모형실험 조건에 대해 포물형근사식을 적용한 수치해석을 수행하여 실험결과와 비교하였다.

A time-domain simulation of an oscillating water column with irregular waves

  • Koo, Weoncheol;Kim, Moo-Hyun
    • Ocean Systems Engineering
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    • 제2권2호
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    • pp.147-158
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    • 2012
  • A time-domain simulation of a land-based Oscillating Water Column (OWC) with various irregular waves as a form of PM spectrum is performed by using a two-dimensional fully nonlinear numerical wave tank (NWT) based on the potential theory, mixed Eulerian-Lagrangian (MEL) approach, and boundary element method. The nonlinear free-surface condition inside the OWC chamber was specially devised to describe both the pneumatic effect of the time-varying pressure and the viscous energy loss due to water column motions. The quadratic models for pneumatic pressure and viscous loss are applied to the air and free surface inside the chamber, and their numerical results are compared with those with equivalent linear ones. Various wave spectra are applied to the OWC system to predict the efficiency of wave-energy take-off for various wave conditions. The cases of regular and irregular waves are also compared.

Seismic collapse propagation in 6-story RC regular and irregular buildings

  • Karimiyan, Somayyeh;Moghadam, Abdolreza S.;Karimiyan, Morteza;Kashan, Ali Husseinzadeh
    • Earthquakes and Structures
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    • 제5권6호
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    • pp.753-779
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    • 2013
  • One of the most important issues in progressive collapse mechanism of the buildings is evaluation of the collapse distribution in presence of the earthquake loads. Here, collapse propagation is investigated by tracking down the location and type of the collapsed beam and column elements, from the first element to the entire buildings. 6-story reinforced concrete ordinary moment resisting frame buildings with one directional mass eccentricity of 0%, 5%, 15% and 25% are studied to investigate differences among the progressive collapse mechanism of the regular and irregular buildings. According to the results of the nonlinear time history analyses, there are some patterns to predict progressive collapse scenarios in beam and column elements of the similar regular and irregular buildings. Results also show that collapse distribution patterns are approximately independent of the earthquake records.

기존 실험데이터를 통한 철근콘크리트 이형벽체의 휨내력식 평가 (Evaluation of Flexural Capacity of Reinforced Concrete Irregular Walls Based on Existing Experimental Data)

  • 문경신;하상수;최창식;이원호;이리형
    • 한국콘크리트학회:학술대회논문집
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    • 한국콘크리트학회 2001년도 봄 학술발표회 논문집
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    • pp.845-850
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    • 2001
  • The primary objective of this study is to develop the new equation that can predict the flexural strength of irregular walls by applying the concept of the effective width which is used in current codes. Results obtained from this data analysis are as follows : 1. It is conservative to use PCI provision and ACI code as the effective width for evaluating the flexural capacity of irregular walls 2. The result of this study shows that the Paulay & Priestley's proposition is available for more exactly and safely predicting flexural capacity of irregular walls throughout a reduction factor.

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