• Title, Summary, Keyword: 유사 동적 실험

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Modified Sequential Algorithm schema for Efficient Digital Image retrieval (Modified Sequential Algorithmic Schema를 이용한 디지털 사진의 효율적인 분류)

  • Lee, Sang-Lyn
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.237-240
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    • 2007
  • 이 논문에서는 수정된 Sequential Algorithmic Schema를 이용해서 여러 장소를 이동하면서 찍은 디지털 이미지를 효율적으로 분류할 수 있는 방법을 제안한다. 제안하는 방법은 이웃 패턴들과 특징 정보의 연속성, 유사성을 가지며 들어오는 입력 패턴에 대해 기존의 모든 군집과 유사도를 비교하는 방법이 아니라 이전 군집의 정보와 유사도를 비교하여 군집에 포함시키거나 동적으로 군집을 생성하는 효율적인 군집화 방법이다. 제안한 방법은 실험을 통해서 기존의 군집화 기법에 성능 및 속도의 효율성을 증명하였다.

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Effect of Recreational Exercise on Cognition, Depression, Dynamic Balance and Leg Strength in Elderly Women (레크리에이션 운동프로그램이 여성노인의 인지기능과 우울, 동적 평형성 및 하지근력에 미치는 영향)

  • Kim, Nan-Soo
    • The Journal of the Korea Contents Association
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    • v.10 no.3
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    • pp.373-380
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    • 2010
  • The purpose of this study was to evaluate the effects of recreational exercise on cognition, depression, dynamic balance and leg strength in elderly women. This study was nonequivalent control group pre-post test design. Subjects were divided into two group(exercise group=14, control group=13). Experimental group conducted recreational exercise program for eight-week. Cognition was assessed by K-WAIS(object assembly & digit symbol) and depression were assessed by questionnaire. Dynamic balance(DB) and leg strength(LS) were assessed by 244cm up & go and sit to stand respectively. The collected data analyzed by Wilcoxon singed rank test and Mann-Whitney U test. The exercise group significantly improved cognition(object assembly) and DB, but control group significantly reduced DB. DB in exercise group were significantly greater than in control group after eight-week. The program was effective on cognition and dynamic balance in elderly women.

Comparative Study on the Quantity Economic Analysis of Apartment Frames Using SDS Result of Dynamic Centrifuge Test at Pile Foundation (말뚝기초의 동적실험결과를 사용한 아파트 골조의 경제성 비교분석)

  • Kim, Sang-Yeon;Park, Jong-Bae;Park, Yong-Boo
    • LHI Journal of Land, Housing, and Urban Affairs
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    • v.6 no.3
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    • pp.147-152
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    • 2015
  • Site coefficient and amplification factor of current domestic Seismic Design Code based on American Seismic Code, have no consideration for the domestic ground condition in which the base rock is normally placed within 30m form the surface. By previous studies, the measured spectral acceleration of the result of dynamic centrifugal test and analysis was smaller than the design spectral acceleration for the period over 1.5 sec. Accordingly, in this study structural analysis and design using dynamic centrifugal test result for pile foundation were achieved, and the quantity of concrete and reinforcement of wall frame was compared with each other. Comparison results of cost using KBC the design spectral acceleration of SC, SD site and SDS, the quantity of reinforcement using SDS for SD site was 17~23% smaller than using the design code SD site.

Dynamic Recommendation System for a Web Library by Using Cluster Analysis and Bayesian Learning (군집분석과 베이지안 학습을 이용한 웹 도서 동적 추천 시스템)

  • Choi, Jun-Hyeog;Kim, Dae-Su;Rim, Kee-Wook
    • Journal of Korean Institute of Intelligent Systems
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    • v.12 no.5
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    • pp.385-392
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    • 2002
  • Collaborative filtering method for personalization can suggest new items and information which a user hasn t expected. But there are some problems. Not only the steps for calculating similarity value between each user is complex but also it doesn t reflect user s interest dynamically when a user input a query. In this paper, classifying users by their interest makes calculating similarity simple. We propose the a1gorithm for readjusting user s interest dynamically using the profile and Bayesian learning. When a user input a keyword searching for a item, his new interest is readjusted. And the user s profile that consists of used key words and the presence frequency of key words is designed and used to reflect the recent interest of users. Our methods of adjusting user s interest using the profile and Bayesian learning can improve the real satisfaction of users through the experiment with data set, collected in University s library. It recommends a user items which he would be interested in.

Evaluation of Seismic Performance on Shear Walls in Steel House (스틸하우스 전단벽체의 내진성능평가)

  • 이재석;이승은;홍건호;김원기
    • Journal of the Earthquake Engineering Society of Korea
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    • v.6 no.6
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    • pp.65-72
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    • 2002
  • This study estimates steel house shear wall's seismic performance depending on trend of seismic design. As a result at cyclic-test, the capability of energy dissipation about X1SPCH during this test is good enough. The capability of energy dissipation of X3SPCH and X4SPCH was better than that of X1SPCH. The X2SPCH which is similar to real X-braced shear wall has better seismic performance than shear wall braced with structural sheathing materials on pseudo-dynamic test.

Effective Handwriting Verification through DTW and PCA (DTW와 PCA에 기반한 효과적인 필적 검증)

  • Jang, Seok-Woo;Huh, Moon-Haeng;Kim, Gye-Young
    • Journal of the Korea Society of Computer and Information
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    • v.14 no.7
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    • pp.25-32
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    • 2009
  • In this paper, we propose a new handwriting verification method using pattern analysis in off-line environments. The proposed method first segments character regions in a document and extracts effective features from the segmented regions. It then estimates the similarity between the extracted non-linear features and reference ones by using dynamic time warping and principal component analysis. Our handwriting verification method extracts handwriting features effectively and enables the verification of handwriting with various lengths of features as well as ones of short patterns. The experimental results show that our method outperforms others in terms as accuracy. We expect that the proposed method will automate the manual handwriting verification tasks and provide much objectivity on handwriting identification.

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Adaptive Region Segmentation using Static/Dynamic Pattern Matching (정적/동적 패턴을 이용한 적응적 영역 분할 방법)

  • Park, Kyoung-Hwan;Lee, Chi-Won;Lee, Chang-Woo
    • Proceedings of the Korean Society of Computer Information Conference
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    • pp.145-148
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    • 2010
  • 본 논문에서 우리는 도로 영역과 하늘 영역, 그리고 도로와 하늘이 아닌 나머지 영역으로 분할하기 위해 동적인(dynamic) 패턴을 이용한 적응적인(adaptive) 병합 방법을 제안한다. 원본영상에서 Mean Shift 알고리즘과 라벨링(Labeling)을 수행하고 영역을 과분할 한다. 컬러에 의해서 도로와 하늘영역이 검출되지 못하는 영역을 위해서 도로 영역과 하늘 영역에서 동적인 패턴 추출한 후 매칭을 통해 유사 영역을 병합한다. 이것은 도로와 하늘의 정보를 현재 환경에서 적응적으로 추출하는 방법이다. 실험에서 정적인(static) 패턴을 사용해서 병합하는 방법과 동적인 패턴을 사용해서 병합하는 방법을 비교하였다. 그 결과, 동적인 패턴을 사용하였을 때 8.12%의 향상된 성능을 보였다.

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A Dynamic Variable Window-based Topographical Classification Method Using Aerial LiDAR Data (항공 라이다 데이터를 이용한 동적 가변 윈도우 기반 지형 분류 기법)

  • Sung, Chul-Woong;Lee, Sung-Gyu;Park, Chang-Hoo;Lee, Ho-Jun;Kim, Yoo-Sung
    • Spatial Information Research
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    • v.18 no.5
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    • pp.13-26
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    • 2010
  • In this paper, a dynamic variable window-based topographical classification method is proposed which has the changeable classification units depending on topographical properties. In the proposed scheme, to im prove the classification efficiency, the unit of topographical classification can be changeable dynamically according to the topographical properties and repeated patterns. Also, in this paper, the classification efficiency and accuracy of the proposed method are analyzed in order to find an optimal maximum decision window-size through the experiment. According to the experiment results, the proposed dynamic variable window-based topographical classification method maintains similar accuracy but remarkably reduce computing time than that of a fixed window-size based one, respectively.

Similitude Law on Small Scaled RC Model for Seismic Performance Evaluation Tests (내진성능평가실험을 위한 철근콘크리트 축소모형 상사법칙)

  • Lee, Do-Keun;Cho, Jae-Yeol
    • Proceedings of the Korea Concrete Institute Conference
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    • pp.455-456
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    • 2009
  • Although pseudo-dynamic test and shaking table test have been performed using small scale models to evaluate the seismic performance of RC structures, researches on similitude law are not sufficient. This study presents a reasonable similitude law for improvement of economical efficiency and reliability.

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A Study on the Earthquake Response Characteristics of Steel Frames with Metallic Damper (강재 댐퍼를 부착한 철골조의 지진응답특성에 관한 연구)

  • Lee, Seung-Jae;Park, Jae-Seong;Oh, Sang-Hoon
    • Journal of the Korean Association for Spatial Structures
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    • v.11 no.2
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    • pp.119-127
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    • 2011
  • The purpose of this study is to propose damper system which is easy to design, which can ensure against risks, and to verify earthquake response characteristics. For this study, the pseudo dynamic earthquake response tests carried out for steel frames with metallic damper. As a result, in case of using the metallic damper as a vibration control device proposed by this study, the damper having higher stiffness than main-structure turned to the state of plasticity by little displacement has been proved to be able to absorb earthquake energy.