• 한국지진공학회논문집
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• 제2권4호
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• pp.191-197
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• 1998

This paper described the dynamic characteristics of 20-story apartment buildings from the results of full-scale measurements and analysis. The natural frequencies and mode shapes are quantified by measuring and analyzing ambient vibrations of the structure and compared with the results from dynamic analysis. Comparison with computed mode shapes and frequencies shows good agreement with the experimental results. It proved that it is important to estimate coupling beam and soil parameters through a comparison of the measured results with calculated results.

• 한국콘텐츠학회논문지
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• 제17권5호
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• pp.624-632
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• 2017

영상을 이용한 나비 종 자동 인식 기법은 생물종 다양성 연구 및 종의 진화, 발달 과정의 연구를 위한 기초 작업을 돕는 것으로 연구자들의 관심이 높다. 기계학습 기반의 나비 종 인식 시스템은 사용하는 특징 추출 방법에 성능이 크게 좌우되는 성질을 가지고 있다. 본 논문은 나비 영상이 가진 색채 강도의 분포를 이용하는 색채 강도 (Color Intensity) 엔트로피를 제안하고 기존에 제시된 가지 길이 유사성 (Branch Length Similarity) 엔트로피와 함께 사용할 경우 10% 이상의 인식률 향상을 얻을 수 있음을 보인다. 제안한 방법의 신뢰성 있는 성능 평가를 위해 영상 인식에 자주 사용되는 대표적인 특징 추출 방법인 아이겐 이미지, 2D 푸리에 변환, 2D 웨이블릿 변환 방법들을 비교 대상으로 다양한 기계학습을 이용해 성능을 평가한다.

• 대한약침학회지
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• 제11권2호
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• pp.87-95
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• 2008

Objectives The aim of this experiment is to provide an differentiation of ginseng, red ginseng, cultivated wild ginseng(CWG), and red wild ginseng(RWG) through component analysis using HPLC(High Performance Liquid Chromatography, hereafter HPLC). Methods Comparative analyses of ginsenoside $Rg_3$, ginsenoside $Rh_2$, and ginsenosides $Rb_1$ and $Rg_1$ of various ginsengs were conducted using HPLC. Results 1. CWG was relatively heat-resistant and showed slow change in color during the process of steaming and drying, compared to cultivated ginseng. 2. Ginsenoside $Rg_3$ was not detected in cultivated ginseng and CWG, whereas it was high in red ginseng and RWG. Ginsenoside $Rg_3$ was more generated in red ginseng than in RWG. 3. Ginsenoside $Rh_2$ appreared during steaming and drying of cultivated ginseng, whereas it was more increased during steaming and drying of CWG. 4. Ginsenoside $Rg_1$ content was more increased during steaming and drying of cultivated ginseng, whereas it was more decreased during steaming and drying of CWG. 5. Ginsenoside $Rb_1$ content was increased about 500% during steaming and drying of cultivated ginseng, whereas it was increased about 30% during steaming and drying of CWG, indicating that ginsenoside $Rb_1$ was more generated in red ginseng than in RWG. 6. Ginsenoside $Rg_3$ content was higher, whereas ginsenoside $Rg_1$ content was lower in 11th RWG than in 9th RWG, indicating that ginsenoside $Rg_3$ content was increased and $Rg_1$ content was decreased as steaming and drying continued to proceed. Ginsenoside $Rh_2$ and $Rb_1$ contents began to be increased, followed by decreased after 9th steaming and drying process. Conclusions Above experiment data can be an important indicator for the dentification of ginseng, red ginseng, CWG, and RWG. And the following studies will be need for making good product using CWG.