• Title/Summary/Keyword: Measure point

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A Study of Information System Availability Guarantee Methods and Application

  • Kim, Hee Wan
    • International Journal of Advanced Culture Technology
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    • v.8 no.3
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    • pp.292-299
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    • 2020
  • This paper presents an evaluation criteria of an information system availability for guaranteeing availability (service target level) from the perspective of the SLA contract and its technical point of view. In order to verify the effectiveness for information system failure and availability guarantee measures, three cases were examined. In summary, the failure time was reduced by 32% ~ 62% after applying the availability guarantee measure, verifying the excellence in the evaluation of an information system availability.

Object matching algorithms using robust hausdorff distance measure (Robust hausdorff 거리 척도를 이용한 물체 정합 알고리듬)

  • 권오규;심동규;박래홍
    • Journal of the Korean Institute of Telematics and Electronics S
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    • v.34S no.11
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    • pp.93-101
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    • 1997
  • A Hausdorff distance (HD) is one of commonly used measures for object matching. It calculates the distance between two point sets of edges in two-dimensional binary images without establishing correspondences. This paper proposes three object matching algorithm using robust HD measures based on M-estimation, least trimmed square (LTS), and .alpha.-trimmed mean methods, which are more efficient than the conventional HD measures. By computer simulation with synthetic and real images, the matching performance of the conventional HD smeasures and proposed' robust ones is compared.

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A Study on the Optimal Scheduling in n/m Flow Shop Scheduling : the Measure of Performance (n/m Flow Shop Scheduling에 있어서 최적 Scheduling에 관한 연구 - 평가척도를 중심으로 -)

  • 이근희;김준홍
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.4 no.4
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    • pp.1-13
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    • 1981
  • This paper analyses the efficiency of performance measures from the point of total cost on the accuracy of due date around various measures of performance be in mainly use in the flow shop scheduling theory. For this purpose, complete enumeration method for small problems seems to be the only possible means of evaluation and analysis. Using of the above technique, calculates the 800 Scheduling Problems, and represents it by the cumulative distributions.

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Assessment of Subsurface Damage in Ultraprecision Machined Semiconductors

  • Lucca, D.A.;Maggiore, C.J.;Rhorer, R.L.;Wang, Y.M.;Seo, Y.W.
    • Tribology and Lubricants
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    • v.11 no.5
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    • pp.156-161
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    • 1995
  • The subsurface damaged layer in ultraprecisison machined single crystal Ge was examined by ion channeling. Single crystal Ge surfaces were prepared by chemo-mechanical polishing, mechanical polishing with 1/4 gm diamond abrasive, single point diamond turning and ultraprecision orthogonal flycutting. The extent of subsurface lattice disorder was compared to the crystal's orginal surface quality. Ion channeling is seen to be useful for quantitative measure of lattice disorder in finely finished surfaces.

High accuracy measurement of the position and orientation of SMD VR by Computer Vision (비젼을 이용한 SMD 부품의 위치 및 자세 계측)

  • 김병엽;송재용;한창수;박종현;이영민
    • Proceedings of the Korean Society of Precision Engineering Conference
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    • 1995.04b
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    • pp.371-376
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    • 1995
  • Computer vision is applicated to measure the position and orientation of the SMD on 8mm Camcoder PCB and advanced image processing algorithms for high accuracy and real time processing are proposed. Illumination conditions are optimized for the best image formation and a set of LEDs is used as economic illuminator, which is regarded as a summation of many point sources. Conctete optical system is constructed and the performance of the proposed algorithm is verified by several experiments.

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DISTRIBUTION OF RATIONAL POINTS IN THE REAL LOCUS OF ELLIPTIC CURVES

  • HAHN, S.;LEE, D.H.
    • Journal of the Korean Society for Industrial and Applied Mathematics
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    • v.6 no.2
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    • pp.25-30
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    • 2002
  • Let $E/{\mathbb{Q}$ be an elliptic curve defined over rationals, P is a non-torsion rational point of E and $$S=\{[n]P{\mid}n{\in}{\mathbb{Z}}\}$$. then S is dense in the component of $E({\mathbb{R}})$ which contains the infinity in the usual Euclidean topology or in the topology defined by the invariant Haar measure and it is uniformly distributed.

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Study on the measurement of bolt axial force by ultrasonic wave (초음파에 의한 볼트의 축력측정)

  • 한응교;김재열
    • Journal of the korean Society of Automotive Engineers
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    • v.10 no.3
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    • pp.38-44
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    • 1988
  • It is important to control the axial forces of high tension bolts such as the automobile, construction machine, aircraft, marine engine bolts. However, the direct method to measure the axial forces of bolts practically have not been found out. The ultrasonic techniques is based on the principles that the bolt tensile elongation and ultrasonic velocity changes are proportional to the axial force below the yield point of the materials. From the result of the experiment, the coefficient of acoustoelasticity k could be measured as - 11.18*10$_{-5}$m $m^{2}$k $g_{f}$./.

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Selective Ridge Matching for Poor Quality Fingerprint verification (열악한 지문 영상의 검증을 위한 선택적 융선 정합 기법)

  • 최호석;박영태
    • Proceedings of the IEEK Conference
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    • 2001.06d
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    • pp.9-12
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    • 2001
  • Point pattern matching schemes for finger print recognition do not guarantee robust matching performance for finger print images of poor quality. We present a finger print recognition scheme, where transformation parameter of matched ridge pairs are estimated by Hough transform and the matching hypothesis is verified by a new measure of the matching degree using selective directional information. Proposed method may exhibit extremely low FAR(False Accept Ratio) while maintaining low reject ratio even for the images of poor quality because of the robustness to the variation of minutia points.

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Research about optimal installation of ATP system in High speed Rolling-stock (고속차량 ATP시스템 개량의 최적화에 관한 연구)

  • Ryu, Byung-Gwan
    • Proceedings of the KSR Conference
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    • 2009.05a
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    • pp.476-482
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    • 2009
  • A signal equipment improvement project for the existing facility ATS to ATP is under construction in Kyung-Bu and Ho-Nam commercial line including 400 rolling stocks. But there was a concern for the interface between KTX OBCS and ATP from the beginning of the project. At present, this is the front burner event. This paper introduces interface checking and predicted failure point between KTX OBCS and ATP improvement system. Through this measure the optimal installation of the ATP will be possible. The study was made under maintenance efficiency including reliability because the KTX signal equipment must qualify the above condition.

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TOPOLOGICAL MAGNITUDE OF A SPECIAL SUBSET IN A SELF-SIMILAR CANTOR SET

  • Baek, In-Soo
    • The Pure and Applied Mathematics
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    • v.14 no.1 s.35
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    • pp.1-5
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    • 2007
  • We study the topological magnitude of a special subset from the distribution subsets in a self-similar Cantor set. The special subset whose every element has no accumulation point of a frequency sequence as some number related to the similarity dimension of the self-similar Cantor set is of the first category in the self-similar Cantor set.

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