http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
車輛用 電壓調整器(DC28V100A用)의 制御시스템에 관한 硏究
金孝相 東亞大學校 大學院 1996 大學院論文集 Vol.21 No.-
At present car Voltage Regulators(DC28V100A) used in Korean armored car and bulldozer are assembled from the drawing used in America. Recently for years, Korean armored car Voltage Regulators returned from field were disassembled and analyzed, with the result that there were a lot of poor quality goods in the assembling part of Relay Assembly. Inthis research by analyzing the circuit drawing of Voltage Regulator, I want to remove the cause of poor quality goods and develop goods reducing cost. Experiment is taken by Military standard(MIL-STD-1273A).
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.
김효상,신원용,김동건,조재희,Kim, Hyo-Sang,Shin, Won-Yong,Kim, Donggeon,Cho, Jaehee 한국정보통신학회 2015 한국정보통신학회논문지 Vol.19 No.12
온라인 소셜 네트워크 서비스 중 하나인 트위터는 가장 보편적으로 사용되는 마이크로 블로그인데, 트위터의 개방적 구조로 인해 자동화 프로그램인 트윗 봇이 많이 생성되고 있다. 이 트윗 봇은 적법한 봇과 악성 봇으로 분류되는데, 이 중 악성 봇은 일반 사용자들에게 많은 양의 스팸 정보나 유해한 컨텐츠를 배포하기 때문에 트윗 봇을 검출하는 작업은 반드시 필요하다. 기존 연구에서는 시간적 정보를 활용하여 사람과 트윗 봇을 분류하였다. 본 논문에서는 사용자들의 고 정밀 위치 정보를 알려주는 공간 태그된 트윗 정보를 활용하여 트위터 사용자들의 정확한 위치와 트윗 전송시각을 알아낸 후, 각 사용자의 시공간 엔트로피를 계산하여 트윗 봇을 검출하는 개선된 두 단계 알고리즘을 제안한다. 주요 결과로써, 시간 정보만을 이용한 기존 연구결과보다 각 신뢰도별 봇 검출 확률 및 거짓 경보 확률이 모두 우수하게 나타난다. Twitter, one of online social network services, is one of the most popular micro-blogs, which generates a large number of automated programs, known as tweet bots because of the open structure of Twitter. While these tweet bots are categorized to legitimate bots and malicious bots, it is important to detect tweet bots since malicious bots spread spam and malicious contents to human users. In the conventional work, temporal information was utilized for the classficiation of human and bot. In this paper, by utilizing geo-tagged tweets that provide high-precision location information of users, we first identify both Twitter users' exact location and the corresponding timestamp, and then propose an improved two-stage tweet bot detection algorithm by computing an entropy based on spatio-temporal information. As a main result, the proposed algorithm shows superior bot detection and false alarm probabilities over the conventional result which only uses temporal information.
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.