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Algorithm for Discrimination of Brown Rice Kernels Using Machine Vision

  • C.S. Hwang;Noh, S.H.;Lee, J.W.
    • Proceedings of the Korean Society for Agricultural Machinery Conference
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    • pp.823-833
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    • 1996
  • An ultimate purpose of this study is to develop an automatic brown rice quality inspection system using image processing technique. In this study emphasis was put on developing an algorithm for discriminating the brown rice kernels depending on their external quality with a color image processing system equipped with an adaptor for magnifying the input image and optical fiber for oblique illumination. Primarily , geometrical and optical features of sample images were analyzed with unhulled paddy and various brown rice kernel samples such as sound, cracked, green-transparent , green-opaque, colored, white-opaque and brokens. Secondary, an algorithm for discrimination of the rice kernels in static state was developed on the basis of the geometrical and optical parameters screened by a statistical analysis(STEPWISE and DISCRIM Procedure, SAS ver.6). Brown rice samples could be discriminated by the algorithm developed in this study with an accuracy of 90% to 96% for the sound , cracked, colored, broken and unhulled , about 81% for the green-transparent and the white-opaque and about 75% for the green-opaque, respectively. A total computing time required for classification was about 100 seconds/1000 kernels with the PC 80486-DX2, 66MHz.

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Effect of Edge Confinement on Deformation Capacity in the Isolated RC Structural Walls (벽체 단부의 횡보강근 양에 따른 변형능력의 평가)

  • 한상환;오영훈;이리형
    • Journal of the Korea Concrete Institute
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    • v.11 no.6
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    • pp.101-112
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    • 1999
  • Structural walls have been mostly used for the design of reinforced concrete buildings in seismic areas because they play a role as an efficient bracing system and offer great potential for lateral load resistance and drift control. The lateral resistance system for the earthquake load should be designed to have enough ductility and stable hysteretic response in the critical regions where plastic deformation occurred beyond yielding. The behavior of the reinforced concrete element to experience large deformation in the critical areas by a major earthquake is affected by the performance of the confined core concrete. Thus, the confinement of concrete by suitable arrangements of transverse reinforcement results in a significant increase in both the strength and ductility of compressed concrete. This paper reports the experimental results of reinforced concrete structural walls for wall-type apartment structure under axial loads and cyclic reversal of lateral loads with different confinement of the boundary elements. The results show that confinement of the boundary element by open 'U'-bar and cross tie is effective. The shear strength capacity is not increased by the confinement but deformation capacity is improve.

Construction of Optimal Designs for Blocked Complete Diallel Crosses

  • Kim, Jin;Bae, Jong Sung;Han, Wean Sik;Kim, Seo Young
    • Communications for Statistical Applications and Methods
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    • v.9 no.2
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    • pp.337-346
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    • 2002
  • Complete diallel crosses using group divisible design with m=2 or n=2 and ${\lambda}_1$<${\lambda}_2$ as parameter designs become A-optimal, D-optimal designs. In case of ${\lambda}_2$=${\lambda}_1$+1, this blocked complete diallel crosses become generalized optimal designs.

An Approximated Reasoning with Compensation

  • Kim, Chang-Suk;Kim, Dae-Su
    • Journal of the Korean Institute of Intelligent Systems
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    • v.11 no.6
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    • pp.558-562
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    • 2001
  • In this paper, a fuzzy hyperresolution principle called CFHR. Compensatory Fuzzy Hyperresolution, with positive compensation facility is proposed. Usually hyperresolution has several terms of conditon parts. Theser terms have to be connected by the an connective. If the main/max operator to be used the and operation, there is some dependency problem of the min/max operator. So , we propose a compensatory operator EGM and applied it to the CFHR, We show the CFHR does more meaningful reasoning than existing method. We also prove the completeness of CFHR.

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Development of RCM Framework for Implementation on Safety Systems of Nuclear Power Plant

  • Kim, Tae-Woon;Brijendra Singh;Park, Chang K.;Chang, Tae-Whee;Song, Jin-Bae
    • Proceedings of the Korean Nuclear Society Conference
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    • pp.631-636
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    • 1996
  • This paper presents a Reliability Centered Maintenance (RCM) framework for implementation on safety system of nuclear power plant (NPP). RCM is a systematic methodology to optimize the surveillance and maintenance tasks for critical components which provides efficiently and effectively reliability of system and safety of plant. Maintenance of the safety systems is essential for its safe and reliable operation. Reliability Centered Maintenance at NPP is the program which assure that plant system remains within original design criteria and that is not adversely affected during the plant life time. Aim of this paper is to provide the RCM framework to implement it on safety systems. RCM framework is described in four major steps.

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Sonication Effect on NAPL Extraction from Soils (초음파를 이용한 흙에서의 NAPL의 추출에 관한 연구)

  • Kim, Young-Uk;Khim, Jeehyeong;Lee, In-Mo
    • Journal of the Korean Geotechnical Society
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    • v.16 no.3
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    • pp.23-28
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    • 2000
  • 초음파를 이용한 지반 세척의 효율을 높이기 위한 방법이 최근에 개발되었지만 그에 대한 연구는 아직 초기 단계인 실정이다. 본 연구는 초음파가 지반 정화에 미치는 영향에 대하여 실내 실험을 통해 고찰하였으며 특히 초음파 에너지의 강도, 시료의 종류 및 밀도, 그리고 수두의 변화가 지반 세척에 미치는 영향에 대하여 연구를 수행하였다. 상기의 연구 결과 지반 세척시 초음파가 세척 능력을 상당히 향상시키는 것으로 나타났으며 초음파에너지가 강할수록, 흐름 속도가 느릴수록 초음파의 효과가 크게 나타났다.

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