• Title/Summary/Keyword: Experimental designs

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DESIGN STUDY OF ELECTROMAGNET FOR MAGLEV (실용화 자기부상열차의 부상용 전자석 설계 검토)

  • Kang Byung-Gwan;Kim Kuk-Jin;Kim Bong-Sub;Choi Gu-Chul
    • Proceedings of the KSR Conference
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    • 2004.06a
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    • pp.1303-1307
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    • 2004
  • MAGLEV is the vehicle which can run in levitated condition by the electro-magnets, and the vehicle can run without any contact condition. In MAGLEV system achieving a high magnetic field for minimum weight is a noteworthy goal. Unfortunately the two aspects of this goal high field and low weight are contradictory. Suitable designs must be sought using optimization techniques. In this paper, magnet attraction force is calculated and conformed by experimental data for designing a electro-magnet.

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Fast Voronoi Divider for VQ Code book Designs

  • Jang, Gang-Yi;Choi, Tae-Young
    • The Journal of the Acoustical Society of Korea
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    • v.15 no.1E
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    • pp.34-38
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    • 1996
  • In this paper, a new fast voronoi divider for vector quantization (VQ) is introduced, which results from Theorem that the nearest vectors in the sense of minimum mean square error(MMSE) have almost the same mean values of their elements. An improved splitting method for a VQ codebook design using the fast voronoi divider is also presented. Experimental results show that the new method reduces the complexity of training a VQ codebook several times with a high signal to noise ratio(SNR) using an appropriate extensive parameter of codebook.

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A Study on the Design of Rotating Band (회전안정탄의 탄대 설계개선을 위한 연구)

  • 이영규;박용복;양동열;조용찬;한만준
    • Proceedings of the Korean Society for Technology of Plasticity Conference
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    • 1997.03a
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    • pp.192-195
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    • 1997
  • The deformation of the rotating band is simulated to improve the original design of the rotating band. The improved designs are proposed by referring the result of the finite element analysis. A new experimental technique is proposed and its application has been carried out to show the validity of the result of the analysis and the performance of the improved design of the band.

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Experimental Study on the Development of Vibration Controlled Concrete (진동제어 콘크리트 개발에 관한 실험적 연구)

  • 최우성;이대형;정영수
    • Proceedings of the Korea Concrete Institute Conference
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    • 1996.04a
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    • pp.180-185
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    • 1996
  • Construction activities and operation of transportation facilities have caused unfavorable effects such as civil petitions associated with vibration-induced damages or nuisances. The objedtive of this research is to develop vibration-controlled concrete containing foams, latex, rubber powders, plastic resins and etc as a concrete mixture. As the first step to achieve this research, preliminary mix designs have been carried out to find out an appropriate mix proportion above 200kg/㎠ in uniaxial compressive strength, and investigate their dynamic mechanical characteristics such as dynamic elastic moduli, material damping ratio, Poisson's ratio, resonant frequency and etc.

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A Study On Detecting Outliers In Two-Way Tables (이원배치법(二元配置法)에서의 이상치(異常置) 발견방법(發見方法)에 대한 연구(硏究))

  • Gang, Eun-Mi
    • Journal of Korean Society for Quality Management
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    • v.15 no.1
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    • pp.63-67
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    • 1987
  • Basic problems in the study of detecting outliers from data of experimental designs are that they are difficult to detect and their presence influences the analysis of variance of the data set. This article is concerned with mainly detecting outliers in two-way tables with no replications. Various methods are reviewed and their relations to the Andrews-Pregibon's Statistic and Cook's Statistic are derived.

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Asymptotically Distribution-Free Procedure in a Two-Way Layout

  • Park, Young-Hun
    • Journal of the Korean Statistical Society
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    • v.24 no.2
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    • pp.375-387
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    • 1995
  • Main purpose of this article is to consider the asymptotic distribution of the rank transformed F statistic for interaction in a two-way layout. Some theorems and sufficient conditions are derived to have the rank transformed F statistic converged in distribution to a chi-squared random variable with (I-1)(J-1) degrees of freedom divided by (I-1)(J-1). These results will be useful for the other theoretical studies of the rank transform procedure in experimental designs.

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Texture profile analysis of acorn flour gel-Comparison of 3$\times$3 latin square with 3sup 3 factorial experiment - (도토리묵의 Texture 특성 -라틴방격법과 요인배치법의 비교-)

  • 김영아
    • Journal of the Korean Home Economics Association
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    • v.23 no.3
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    • pp.49-53
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    • 1985
  • The typical texture profile analysis of acorn flour gel was investigated with Instron univ. testing machine by two experimental designs, 3$\times$3 latin square and $3^{3}$factorial experiment. As the result, it was revealed that Latin square is a useful method to reduce the number of experiments, in the case of a negligible interaction.

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VLSI Implementation of Hopfield Neural Network (Hopfield 신령회로망의 VLSI 구현에 관한 연구)

  • 박성범;오재혁;이창호
    • Journal of the Korean Institute of Telematics and Electronics B
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    • v.30B no.11
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    • pp.66-73
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    • 1993
  • This paper presents an analog circuit implementation and experimental resuls of the Hopfield type neural network. The proposed architecture enables the reconfiguration betwewn feedback and feedforward networks and employs new circuit designs for the weight supply and storage, analog multilier, nd current-voltage converter, in order to achieve area efficiency as well as function al versatility. The layout design of the eight-neuron neural network is tested as an associative memory to verify its applicability to real world.

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3n-p Fractional Factorial Design Excluded Some Debarred Combinations

  • Park, Byoung -Chul
    • Communications for Statistical Applications and Methods
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    • v.6 no.3
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    • pp.695-706
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    • 1999
  • When fractional factorial experiments contain some infeasible treatment combinations called debarred combinations we should construct experimental designs so that those debarred combinations are to be excluded by selecting defining contrasts appropriately. By applying Franklin(1995)'s procedure for selecting defining contrasts to Cheng and Li(1993)'s method this paper presents a method of selecting defining contrasts to construct orthogonal 3-level fractional factorial experiments which exclude some debarred combinations.

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A Study on the Gestalt IIIusion Effect of Clothing Design. (의복디자인에 따른 게스탈트 착시효과에 관한 연구)

  • 이인자
    • Journal of the Korean Society of Costume
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    • v.22
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    • pp.333-344
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    • 1994
  • In this study an experiment was made using the function of computer simulation os to whether the phenomenon of optical illusion takes place also in clothing on the human body three-dimensional space through the case study of the Gestalt illusion of planar con-traction and expension by amodal completion in perceptual organization. One woman of latter 30s was selected as the experimental subject. She was made to wear the experimental clothing and then the frontal picture was projected of in the experimental clothing which was scanned into the com-puter. For the sake of the contractive experiment 5 stages were divided by 5-15cm the thick-nes of the black vertical line in the center of the upper garmet as the variable and for the sake of the expansive experiment the skirt length was set as the variable. It length measured 50-90cm which was divided by 10cm into 5 stages and simulated using the CAD. The basic design and the experimental de-sign were made one pair and the pictures totalled 20 pictures such as ten pictures save the human body for the estimation of the up-per garmet alone and ten pictures for the ob-servation of the effect on the human body. The extimating panel consisting of 20 panellers estimated contraction/expansion in the estimation of the upper garmet and the tall effect/the slim effect in the estimation of optical illusion as the estimating factors on the 9-point scale. All the date from experiment were analyzed by ANOVA(analysis of variance) and DUNCAN'S multiple range. As a result the experimental designs all showed a significant optical illusion in comparision with the basic design.

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