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      • 플라즈마화상 계측 시스템에 있어서의 시준기특성의 보정

        백승권 인제대학교 1995 仁濟論叢 Vol.11 No.1

        플라즈마화상 계측 시스템에 있어서, 단층화상의 화질이 떨어지는 문제점 중의 하나로서 검출기의 시준기특성이 있다. 이것은 시준기가 길이를 가진 형태이기 때문에 생기는 것으로써, 화상에서는 천이변형의 왜곡으로 나타난다. 본 논문에서 보정법으로 측정데이타를 공간주파수 상에서, 천이불변형태로, 디콘볼루션 하는 방법을 제시하고, 시준기의 각도를 파라메타로 해서, 플라즈마 계측에 의한 실제의 데이타에 그 보정법의 유효성을 검증하였다. In plasma image measurement and control system, one of the distortions of a reconstructed image is related to a collimator system. The distortion, which has a shift-variant property, is caused by a geometrical structure of the collimator. We developed a correction method considering this property. The correction is performed in the frequency domain. The conception of the correction method is that the blurring function is defined at the circular position of the polar coordinate in the frequency domain. The cyclic deconvolution of projection data with the shift-variant blurring function is effective to remove the distortion. In the paper, we considered the effect of aperture angle. The applicability to practical studies was discussed.

      • 主屹山 植生 調査硏究

        白承彦,金洪殷,朴勝龍 충북대학교 농업과학기술연구소 1988 農業科學硏究 Vol.6 No.1

        The vertical distribution of woody plants in Mt. Choohul based on assosiation analysis was summarized as follows : 1.Plant communities in Mt. Choohul could be divides into three basic vegetation girdles, i.e., the first girdle between 0-300 m, the second girdle between 300-700 m and the third girdle above 700 m. 2.The typical woody plants of the first girdle were cephalolaxus koreana, Benzoin glaucuin, Quercus dentata, Hocquatia manchuriensis, Prunus choreiana, Salix glandulosa, Solarium lyratum var. pubescens. 3.The typical woody plant of the second girdle were Cephalolaxus nana, Akebia quinata Corylus heterophylla var. japonica, Ulmus davidina var. japonica for. Subelosa, Acer Ginnala, Salix gracilistyla, Palura Tanakana, Callicarpa japonica var. typica, Artemisia Misser Schmidtiana var. viridis for. typica. 4.Quercus crispula was typical woody plant of the third girdle. 5.Total of 179 woody plants belonging to 55 families,88 genera, 120 species, 1 aubspecies and 3 varieties were observed in Mt. Choohul.

      • 七寶山, 萬塔山, 白頭山, 車踰山, 松眞山 및 甑山森林帶에 對한 檢討

        白承彦 충북대학교 농업과학기술연구소 1990 農業科學硏究 Vol.8 No.2

        The purpose of this study was to investigate the forest communities in the Mts. Cheel-Bo, Mahn-Tahp, Baek-Doo, Chah-Yoo, Song-Jeen and Juhng-Sahn by means of the association-analysis based on the observation of Chung & Lee. The results were summarized as follows : 1. The forest in Mt. Cheel-Bo could be divided into five basic vegetation girdles : the first girdle below 100 meters above sea level, the second girdle from 100 meters to 400 meters, the third girdle from 400 meters to 600 meters, the fourth girdle from 600 meters to 800 meters and the fifth girdle from 800 meters to the top. And these five basic vegetation girdles were divided into two forest zones such as a montane zone below 800 meters above sea level and a transition zone from 800 meters to the top. 2. The forest in Mt. Mahn-Tahp could be divided into eight basic vegetation girdles : the first girdle from 200 meters to 400 meters above sea level, the second girdle from 400 meters to 700 meters, the third girdle from 700 meters to 900 meters, the fourth girdle from 900 meters to 1200 meters, the fifth girdle from 1200 meters to 1500 meters, the sixth girdle from 1500 meters to 1700 meters, the seventh girdle from 1700 meters to 2000 meters and the eighth girdle from 2000 meters to the top. And these eight basic vegetation girdles were divided into four forest zones such as a montane zone below 700 meters above sea level, a transition zone from 700 meters to 1200 meters, a subalpine zone from 1200 meters to 2000 meters and an alpine zone from 2000 meters to the top. 3. The forest in Mt. Baek-Boo could be divided nine basic vegetation girdles : the first girdle from 200 meters to 300 meters above sea level, the second girdle from 300 meters to 700 meters, the third girdle from 700 meters to 1000 meters, the fourth girdle from 1000 meters to 1200 meters, the fifth girdle from 1200 meters to 1400 meters, the sixth girdle from 1400 meters to 1800 meters, the seventh girdle from 1800 meters to 2000 meters, the eighth girdle from 2000 meters to 2300 meters and the ninth girdle from 2300 meters to the top. And these nine basic vegetation girdles were divided into four forest zones such as a montane zone below 700 meters above sea level, a transition zone from 700 meters to 1000(1200) meters, a subalpine zone from 1000(1200) meters to 2000 meters and an alpine zone from 2000 meters to the top. 4. the forest in Mt. Chah-Yoo could be divided into five basic vegetation girdles : the first girdle from 100 meters to 200 meters above sea level, the second girdle from 200 meters to 500 meters, the third girdle from 500 meters to 800 meters, the fourth girdle from 800 meters to 1200 meters, and fifth girdle from 1200 meters to the top. And these five basic vegetation girdles were divided into three forest zones such as a montane zone below 800 meters above sea level, a transition zone from 800 meters to 1200 meters and a subalpine zone from 1200 meters to the top. 5. The forest in Mt. Song-Jeen could be divided into four basic vegetation girdles : the first girdle from 100 meters to 200 meters above sea level, the second girdle from 200 meters to 500 meters, the third girdle from 500 meters to 800 meters and the fourth girdle from 800 meters to the top. And these four basic vegetation girdles were divided into two forest zones such as a montane zone below 800 meters above sea level and a transition zone from 800 meters to the top. 6. The forest in Mt. Juhng-Sahn could be divided into four basic vegetation girdles : the first girdle from 100 meters to 200 meters above Sea level, the Second girdle from 200 meters to 400 meters, third girdle from 400 meters to 700 meters and the fourth girdle from 700 meters to the top. And these four basic vegetation girdles were divided into two forest zones such as a montane zone below 700 meters above sea level and a transition zone from 700 meters to the top. 7. The critical species of these communities were listed in the conclusion and the discussions.

      • 알코올리즘 치료를 위한 가상환경 시스템과 HRV 분석

        백승은,백승화,유종현,김동완 明知大學校 産業技術硏究所 2005 産業技術硏究所論文集 Vol.24 No.-

        Medications or conitive-behavior methods have been mainly used as a treatment of alcoholism, lately the virtualy technology has been applied to the kink of alcoholic disorders. A virtual environment makes him having avility to over come the drink. In this study, we were implemented by making panorama images and 3D object modules using 3D MAX. VRML, JAVA. And the BAR stimulator that composed with a position sensor, head mount display, and audio system, is suggested. To illustrate the physiological difference between a person who has a alcoholism and and without a liquor bottle, heart rate was measured during experiment, and also measured a person's HR after the virtual reality training. We demonstrated the subjective effectiveness of virtual reality psychotherapy through the clinical experiment.

      • 톱니함수를 이용한 카오스 상태머신의 구현

        박광현,김승연 大田産業大學校 1996 한밭대학교 논문집 Vol.13 No.1

        We propose the state machine of digital sequential system using the deterministic chaotic function for a practical application of the chaotic dynamics. Chaotic state machine is designed by the shift register as a view of hardware, and is designed to have chaotic characteristic by performing the saw-tooth function.

      • 판재위에 배치된 2차원 형상들의 최적 잘던 경로에 관한 연구

        백승수,김종민,김민환 부산대학교 1995 生産技術硏究所論文集 Vol.48 No.-

        There are many methods for cutting out 2D shapes arranged on the plane. For increasing productivity, it is very important to select proper cutting path. In this paper, we propose an algorithm for optimizing cutting path among the 2D shapes. The algorithm uses minimum distance information between some pairs of neighboring 2D shapes and represents the arranged shapes as a weighted graph. Then, we can get the optimal cutting path by constructing minimum spanning tree from the weighted graph. 2차원 평면의 판재 위에 배치되어 있는 형상들을 절단하기 위한 방법은 여러 가지가 있고, 적절한 절단 경로의 선택은 생산성을 높이는데 아주 중요한 요소이다. 본 논문에서는, 형상들의 절단 경로를 최적화 하는 알고리즘을 제시한다. 본 논문에서 제시하는 알고리즘은 이웃하는 형상들 간의 최소 거리 정보를 이용하여, 배치된 형상들을 가중치 그래프(weighted graph)로 나타낸다. 형상들 사이의 최적 잘단 경로는 주어진 가중치 그래프에서 최소 스패닝 트리(minimum spanning tree)를 추출하여 구하게 된다.

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