• Title/Summary/Keyword: Comparative Methods

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A comparative study of classification methods for Face Recognition (얼굴 인식을 위한 분류기법에 관한 비교연구)

  • 이동훈;박영태
    • Proceedings of the Korean Information Science Society Conference
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    • 2003.10b
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    • pp.538-540
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    • 2003
  • 본 논문에서는 얼굴 영상의 변화를 보상할 수 있는 전처리 과정으로서 기하학적 특징에 기반한 순수 얼굴 영역 검출 기법을 도입하고 분류기로서 간단한 정합 기법을 사용한 얼굴 인식 기법을 제안한다. 실험결과를 보면 제안한 기법은 NNC, BPN, SVM 분류 기법에 비해 월등한 성능을 가진다.

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The Corrective Heuristic Algorithm Analysis of the N$\times$3 Flow-shop Problem and Comparative Study with Multi-model (N$\times$3 Flow-shop 문제에 대한 수정된 발견적기법 분석과 기존기법과의 비교연구)

  • 강석호;궁광호
    • Journal of the Korean Operations Research and Management Science Society
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    • v.6 no.2
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    • pp.13-19
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    • 1981
  • This paper developed 3 flow-shop sequencing heuristic methods: modified RA method, modified RACS method and modified RAES method. These methods modified RA method, RACS method and RAES method developed by D. G. Dannenbring. These methods can easily determine desirable sequence of orders and can improve nx3 flow-shop's productivity and efficiency. The maximum flow-time criterion is selected as the evaluation criterion of flow-shop's efficiency, We evaluated these 6 heuristic methods’ performance. By the evaluation of the result, we can see that the modified methods produce a shorter maximum flow-time than the original methods.

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A Study on the Improvement of Export Risk Management in the Changing of Export Payment Methods (무역결제방식의 변화에 따른 수출보험제도의 개선방안에 관한 연구)

  • Kim, Byung-Hak;Gil-Jong, Hong
    • International Commerce and Information Review
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    • v.8 no.3
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    • pp.99-119
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    • 2006
  • The recent trend in the payment terms of international trade shows the gradual shift toward more diversified payment methods (from L/C to not L/C) in order to cope with the increasingly dynamic international transactions in a more flexible manner. The reasons behind this recent shift are as follows : first, the global trade market is breaking away from the traditional L/C methods based on letters of credit toward a not L/C methods. nother reason for the changing trade payment methods is the increasing volume of intra transactions between headquarters and their foreign subsidiaries based on collection payment methods. Having mentioned the above problems that impede the Korean export insurance system, some suggestions can be put forward through a comparative analysis with foreign export insurance system. First, inducing private investments is one way of strengthening financial health of the KEIC. The KEIC also needs to diversify its insurance coverage adapting to the changing international trade environments.

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A Comparative Analysis of Test Methods of Measuring d- and q-Axes Inductances for Interior Permanent Magnet Synchronous Motor (매입형 영구자석 동기전동기의 인덕턴스 측정법 비교 분석)

  • Kim, Seung-Joo;Kim, Cherl-Jin;Lee, Ju
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.58 no.5
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    • pp.923-928
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    • 2009
  • The performance analysis and robust control of the interior permanent magnet synchronous motor(IPMSM) greatly depend on accurate value of its parameters. To achieve the high performance of torque control, it is necessary to consider exact inductance values because the inductances are nonlinear parameters of operating the IPMSM. Therefore many different methods have been performed for analysis of the methodology for the exact measurement of synchronous inductances. None of them is considered standard, and accuracy levels of all these methods are also not consistent. Among these experimental methods, the DC current decay test and the vector current control test are ideal for a laboratory environment. In this paper, these two test methods are compared by applying inductances to the IPMSM. The paper analyzes the measured inductances of the two methods and their differences with inductances obtained from the finite element method(FEM).