http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
이용두 ( Lee Yong Du ),신우석 ( Sin U Seog ),김상현 ( Kim Sang Hyeon ),김창영 ( Kim Chang Yeong ) 한국수처리학회 2004 한국수처리학회지 Vol.12 No.1
N/A This study aims to investigate the characteristic of swine wastewater treatment by liquefied fertilizer tank and outlne of optirnuin manuring of liquefied fertilizer. The results of this study were summarized as follows: The concentrations of BOD5 in raw manure are 15,320 ㎎/L at slurry/scraper type 19,950 ㎎/L at slurry type and 9,010 ㎎/L at scraper type of piggery. The removal rates of the organic substance were 45.3% at slurry/scraper type 54.8% at slurry type and 61.3% at scraper type of piggery. The concentration of NH₃-N was relatively higher at slurry/scrapei type and at slurry type of piggery which contained more feces than at scraper type of piggery. Frorn the beginning of storage to 100 days the concentration of N and P was changed unsteadily, but after 130 days N and P was shown relatively stable concentration. As standard of N concentration after 6 months storage. the required atea of grassy place per a head of animal is 295 ㎡/head at slurry/scraper type 318㎡/ihead at slurry type and 294 ㎡/head at scraper type of piggery.
질소동위원소를 이용한 제주도 옹포천 유역의 질산성질소 오염원 조사 연구
이용두 ( Lee Yong Du ),현승규 ( Hyeon Seung Gyu ),송희경 ( Song Hui Gyeong ) 한국물환경학회 2003 한국물환경학회지 Vol.19 No.4
The purpose of this study was to identify nitrate pollution level and Sources in groundwater at the watershed of Ongpo stream. For this study, two springs(S1 and S2) and 8 wells(W1 - W8) were Selected and investigation was accomplished from April to October, 2001 In using nitrate-nitrogen concentration and stable N isotopes. five sampling sites(S1, S2. W1, W2 and W5) were affected by livestock manure or sewage, but temporarily affected by chemical fertiiizer. Effects of livestock manure or sewage and chemical fertilizer for W3 and W4 were similar but they were affected by chemical Fertilizer in temporal.
산생성세균을 이용한 수소생산에 있어서 NH4+ 농도의 영향
이용두 ( Lee Yong Du ),고인범 ( Go In Beom ) 한국수처리학회 2003 한국수처리학회지 Vol.11 No.4
N/A The stop of hydrogen production is known on the hydrogen production by anaerobic acidogenesis, and research is needed to this cause. This study considered influence of the NH₄^(+) concentration on hydrogen production. The batch and continuous experiments were conducted paying attention to NH₄^(+) concentration as cause of hydrogen production stop by anaerobic acidogenesis. The influence of ammonia on hydrogen production appeared notably in low NH₄^(+) concentration, and seldom appeared in high NH₄^(+) concentration. The bacterial metabolic pathway changed with the NH₄^(+) concentration in substrate, and it moved to the pathway which does not perform hydrogen production in low NH₄^(+) concentration.
MIMD 컴퓨터에서 선형시스템을 풀기 위한 반복병렬알고리즘
채수환(Soo Hoan Chae),이용두(Yong-Du Lee) 한국정보과학회 1993 정보과학회논문지 Vol.20 No.6
In applying parallel algorithms to MIMD computers, exploitation of parallelism, collision prevention in accessing memory units, and reduction of communication loads among processing elements should be considered. In these points, iterative methods are more efficient than direct methods on solving linear systems. But, the speed of convergence is the most important factor in interative methods. Hence, a parallel algorithm using the Jacobi iterative method and the Gauss-Seidel method is proposed to sustain maximal parallelism, and to reduce the communication loads. For evaluation of performance the Jacobi parallel algorithm, the Gauss-Seidel parallel algorithm, and the proposed parallel algorithms are simulated for solving the Laplace equation under the given boundary condition. MIMD컴퓨터에 병렬알고리즘을 적용시킬 때, 주요 고려사항은 병렬성의 추출과 메모리 접속 시에 충돌방지 및 장치 간의 통신부하 감소이다. 이런 면을 고려해 볼 때, MIMD컴퓨터에서 선형시스템의 해를 구하기 위해서는 반복법을 사용하는 것이 직접법을 사용하는 경우보다 효율적이다. 그런데 반복법에서는 수렴속도가 중요한 문제이다. 따라서 본 논문에서는 병렬성을 최대로 유지하면서 반복횟수를 감소시키고 통신부하를 줄이기 위해 Jacobi반복법과 Gauss-Seidel반복법을 같이 이용하는 병렬알고리즘을 제안했다. 알고리즘의 성능평가를 위해 Jacobi 병렬알고리즘, Gauss-Seidel 병렬알고리즘 및 제안한 병렬알고리즘을 이용하여 주어진 경제조건하에서 Laplace 방정식의 해를 구하는 시뮬레이션을 하였다.
李容斗 成均館大學校 1977 論文集 Vol.24 No.-
In this paper is presented a general method to get the solutions of the ordinary differential equations of first order and higher degree with aids of the contact transfromations when the solutions of the equations of first order and first degree are known.