In order to determine the location of average concentration and distribution status of dissolved oxygen in the rectangular aeration tank of the sewage treatment plant was analyzed and the difference of dissolved oxygen concentration was remarkable at each location. Compared with the computational fluid dynamics analysis, it was found that the results were consistent with the measurement results by showing the difference of dissolved oxygen concentration between the locations. Based on the measured data, the representative location of dissolved oxygen in aeration tank was selected by using statistical analysis method and the representative location was expressed in three-dimensional coordinates(LWH : 25%, 50%, 33%) from flow direction and left wall. Also the difference between the dissolved oxygen concentration at the actual measurement location and the average concentration value of the entire aeration tank was founded, and the equations for calibrating the automatic measurement data considering the actual measurement location were calculated.

본 연구에서는 전립샘암 환자에게 방사선 치료법인 3차원 입체조형법과 세기조절치료법을 각각 적용 할 경우 선량분포의 차이를 관찰하여 치료기법의 우수성을 평가하고자 하였다. 실험대상자 10명의 컴퓨터 단층 모의치료영상을 얻어 종양학과 전문의가 종양용적 및 정상장기를 구분하고 종양용적에 흡수선량을 80 Gy로 설정한 후 각각 다른 치료계획을 수립하였다. 그 결과 선량분포윤곽은 세기조절치료법이 우수 하였고 종양조직의 흡수선량은 세기조절치료법이처방선량에 근접(100.2%)하였으며 정상조직 흡수율(방광, 직장, 소장, 좌·우 대퇴골두) 또한 우수하였다. 즉, 전립샘암의 방사선 치료시 세기조절방사선치료가 입체조형치료법보다 선량적인 면에서 양호한 것으로 분석되었다.

Fuzzy algorithm of automatic control for dissolved oxygen(DO) concentration in the aeration tank of an activated sludge process is proposed. Among variables repirometry and air flowrate are selected as significant input factors and the relationship with DO is estimated using a multiple regression model. The DO concentration and the amount of repirometry are fuzzified and the fuzzy rule base are determined. Using the fuzzy algorithm, the change of amount of air flowrate are determined and the change of amount of DO is derived.