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Computer System에 의한 산업용 DNC System에 관한 연구
박영식,오창주,Park Young sik,Oh Chang-ju 한국융합신호처리학회 2000 융합신호처리학회 논문지 (JISPS) Vol.1 No.2
Some evolutional system has been used to promote the efficiency of the DNC(Direct Numerical Control) Controller. However, these are many inconvenience to this operator because it lacks harmony in interaction between the computer and the NC(Numerical Control) Controller. Also, there are some controversial points when data error occurs at the Data Input/Output. Accordingly, this paper explores a new Data Remote Control System. In this study, the NC Controller of the DNC network has to get full data by removing data error in this system. In this system, the main merits are easy manufacturing and the convenience of Data Input/Output. That is, remote control of the NC machine tool is possible without mutual interaction between the computer and itself.
박성천 ( Park Sung Chun ),문병석 ( Moon Byoung Seok ),오창주 ( Oh Chang Ju ),이병조 ( Lee Byoung Jo ) 한국농공학회 1998 韓國農工學會誌 : 전원과 자원 Vol.40 No.1
The purpose of this paper is to establish a method estimating the daily urban water demand using statistical analysis that is used for developing the efficient management and operation of the water supply facilities, and accurary of the model is verified by error rate and F-value. The data used in this study were the daily urban water use, the weather conditions such as temperature, precipitation, relative humidity, etc, and the day of the week. The case study was taken placed for the city of Namwon in Korea. The raw data used in this study were rearranged either by month or by season for analysis purpose, and the statistical analysis was applied to the data to obtain the regression model As a result of this study, the linear regression model was developed to estimate the daily urban water use with weather condition. The regression constant and coefficients of the model were determined for each month of a year. The accuracy of the model was within 3% of average error and within 11% of maximum error. The resulting model was found to be useful to the practical operation and management of the water supply facilities.