• Title/Summary/Keyword: ${131}^I$

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PERTURBATION ANAYSIS FOR THE MATRIX EQUATION X = I - A*X-1A + B*X-1B

  • Lee, Hosoo
    • Korean Journal of Mathematics
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    • v.22 no.1
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    • pp.123-131
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    • 2014
  • The purpose of this paper is to study the perturbation analysis of the matrix equation $X=I-A^*X^{-1}A+B^*X^{-1}B$. Based on the matrix differentiation, we give a precise perturbation bound for the positive definite solution. A numerical example is presented to illustrate the shrpness of the perturbation bound.

A Study on the balancing of stereo image pairs (스테레오 영상간의 휘도 불균형 보정에 관한 연구)

  • 최명환;오세범;임정은;김용태;손광훈
    • Proceedings of the Korean Society of Broadcast Engineers Conference
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    • 2000.11b
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    • pp.131-134
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    • 2000
  • 본 논문에서는 스테레오 좌.우 영상간의 휘도 불균형 보정에 관한 연구를 수행하였다. 좌영상과 우영상의 관계를 선형관계 $(I_L = aI_R +b)$로서 가정하고 휘도 불균형을 보정한 기존 알고리듬(global balancing)의 문제점을 분석하였다. 또한 이러한 문제점을 해결하기 위한 방법으로 두 가지 방법을 제안하는데 히스토그램 균일화를 통한 방법과 영상의 국부적 특징을 이용하여 선형변환을 적용하는 방법(local balancing)이 보다 정확한 변이벡터를 찾는 전처리 과정임을 모의실험을 통해 검증하였다.

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Design and characteristic analysis of thin film inductor (박막 인덕터의 설계 및 특성해석)

  • Kim, B.T.;Kwon, B.I.;Woo, K.I.;Lee, C.G.
    • Proceedings of the KIEE Conference
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    • 2001.04a
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    • pp.129-131
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    • 2001
  • This paper represents the method is to design thin film spiral type inductor using the analytic method and to evaluate the characteristics of the high frequency inductors using HFSS simulation program. The magnetic circuit of the thin film inductor can be successfully simulated by the HFSS.

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Triterpenoids of Ilex pubescens

  • Han, Yong-Nam;Baik, Seung-Kyung;Kim, Tae-Hee;Han, Byung-Hoon
    • Archives of Pharmacal Research
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    • v.10 no.2
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    • pp.121-131
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    • 1987
  • Four triterpenoids were isolated from the roots of Ilex pubescens : two new triterpenoids named pubescenolic acid (I) and pubescenic acid (II), and two known triterpenoids ilexolic acid (III) and oleanolic acid (IV). Chemical and spectroscopic studies have established I and II as 20-epipomolic acid and 24-carboxypomolic acid, repectively.

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