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金孝相 東亞大學校 大學院 1998 大學院論文集 Vol.23 No.-
This Study discribes a effecive method for desining the electronic controled active suspension system by using DSP theory and its processor. The applied algorithm to which control the active suspension system consist of ride comfort, heightt control and attiude control part. It has many input parameter and mainly depand on neumerical technique. It is effective to use DSP processor for implementing such complicated control alogrythm to electronic controller. So, in this theses, electronic controller is constructed by TMS320C52DSP processor having 40MIPS for control algorithm and 16bit micro-processor which has operating frequency of 20Mhz for driving pressure vlave and miscellaneous digital actuator. The application of DSP processor for implemetion of vehicle controller has advantages in control resolution, reduction of control loop time, compression of program code length, and utility in neumeric technique comparing with micro-processor only.
김효상,최부귀 東亞大學校 大學院 2002 大學院論文集 Vol.27 No.-
Because the frequency interference is happened on all frequency band, wee have much interested in the frequency interference in case of dealing with wireless communication. Particularly, Car phone as well as FRI which is used in Microwave and a communication satellite is very complex and difficult. On this study, I will introduce the analytical program about the frequency interference by dealing with RFI that is happened on both a communication satellite network ad microwave communication network on the ground.
金孝相 서울大學校 保建大學院 1973 公衆保健雜誌 Vol.10 No.1
In an attempt to evaluate the air pollution in Seoul area, the levels of sulfur oxides (mg SO₃/100 cm²/day) by lead peroxide candle method and the dust falls (ton/km²/mon.) by deposit gauge method were measured monthly at 25 points(4km²) in industrial, commercial, residential and green areas for three years from 1969 to 1971. The effect of weather factors on the pollution was studied with the meteorological data from the National Centural Meteorological Office. The results are followings; 1. Average concentrations of sulfur oxide were 1.092mg SO₃/100cm²/day in 1969, 1.171 in 1970 and 1.333 in 1971 and the total average of three years was 1.206(S.D. 0.522). 2. Average amount of dust falls was 22.2tons/km²/mon. in 1969, 23.6 in 1970 and 25.4. in 1971 and the total average of the three years was 23.7 (S.D 11.6). 3. The above data of air pollution was matched according to season and area and their correlationship to air pollution was analyzed by computser. (1) The ana1ysis has showed the highest concentration of sulfur oxide with 1.592mgSO₃/100cm²/day in winter and with 1.566. in industrial area. (2) Dust falls, however, has showed the heaviest with 29.9tons/km²/mon. in spring with 33.7. in road commercial area. (3) According to the correlationship between the air pollution concentration and the climatic elements which were checked simultaneously with pollutants, sulfur oxides were high with 1.464mg SO₃/100cm²/day when the atmospheric pressure was over 1.020 mb. and 1.592. when the air temperature was below 0.0℃. It was found that the concentration of air pollution due to sulfur oxide was high when the weather showed high atmospheric pressure at the time there were few cloudes in the sky and many hours of sunshine. It was natural from the view point of topography that Seoul showed the wind direction of west, west-west-north in winter and the wind direction in the winter season showed a significant effect on air pollution in the city area. Dust falls was heavy when the atmospheric pressure and air temperature was high and when the humidity was low and amount of clouds were few. The amount of dust falls was the highest with 26.4 tons/km²/mon. when the wind velocity was over 2.7m/sec. and was low when the amount of precipitation was almost daily and heavy. 4. Contribution rate (ESS/TSS : Explained Sum of Squares/Total Sum of Squaresx100) of climatic element effecting the air pollution during the study period was analyzed by Multiple Classification Analysis method (M.C.A) using the computer. The results are follows; 48.8% of sulfur oxide and 45.0% of dust falls due to the weather condition.
멀티미디어에 있어서 물체의 추적과 인식에 관한 프로그램 설계
김효상,최부귀 동아대학교 2001 大學院論文集 Vol.26 No.-
To remember the figures that we have seen is to store the figures of every moment. And when we remember of previous figures become more and more faint and then, the most recent figures will be able to remain strong in our memory. Finally, in order to pursue the figure that we see now, we must move our eyes to the direction that the previous figures can be most overlapped. By using this principles, we showed the pursuing and recognizing processes of moving figures on following display.