ARIMA모형에 의한 공주지점의 DO 농도 예측

한양수,류병로 大田産業大學校 1997 한밭대학교 논문집 Vol.14 No.1

The purpose of this study is to develop the stochastic stream water qualify model for the intaking station of Kongju City waterworks in the Keum River system. The monthly water dissolved oxygen with periodicity and trend were forcasted by multiplicative ARIMA models and then the applicability of the models was tested based oil 13years of the historical monthly water qualify data at Kongju City intaking site. The parameter estimation was made with the monthly observed data. The last one year data was used to compare the forcasted water qualify by ARIMA model with the observed. The models are ARIMA(2.1.2)x(2.1.1)_l2 for dissolved oxygen. The forecasting results showed a good agreement with the observed. It is implying the applicability of multiplicative ARIMA model for forecasting monthly water qualify at the Kongju site.

중국 관련 관광연구논문의 연구 성향 및 동향 분석 : 국내 학위논문을 중심으로

손수민,주양,한상현 동의대학교 경제경영전략연구소 2011 經濟經營硏究 Vol.6 No.2

This paper is to examine the research trends of the theses of master and Ph.D. which was published in Korea between 1988 and 2010. According to the study, it is observed recent research trends in which 53% of research are sorts of theory of Business administration followed by 28% of Economics and 7% of Sociology. It is clear that Business administration account is the largest proportion of tourism research. Secondly, in terms of nationality of author, Korean and Chinese student studying in Korea began to publish their theses on chinese tourism from 1990 and these kind of theses continued to grow until 2008 regardless of nationality. The theses written by Chinese student studying overseas in 2009 increased over 200% compared to previous year and in 2010 was a total of 30, which accounted for 34.6% of all theses.

하악 유구치 치근단 병소에 의해 변위된 계승 영구치의 맹출유도

양수민,김재곤,백병주,양연미,한지혜 대한소아치과학회 2007 大韓小兒齒科學會誌 Vol.34 No.2

적절히 치료받지 못한 유치의 치수 감염은 치근단 주위로 확산되고 그 치근단 병소는 계승 영구치의 조기 맹출, 법랑질의 저형성이나 저석회화, 발육정지 등의 합병증을 야기할 수 있다. 특히 유치의 치근단 감염은 계승치의 변위를 야기할 수 있으며, 계승 영구치배의 위치변화는 선행 유치의 치수변성으로 인한 것이 가장 많다. 본 증례보고는 하악 유구치의 치근단 병소에 의해 계승치가 변위된 경우로서, 증례 1은 하악 우측 유구치 하방의 치근단 낭에 의한 계승치의 변위가 관찰되어 유치 발치 및 조대술을 시행한 후 obturator를 장착하였고, 증례 2는 하악 우측 제2유구치 하방의 치근단 농양에 의한 계승치의 변위가 관찰되어 유치를 발거하고 공간유지장치를 장착하였다. 본 증례를 통하여 하악 유구치 치근단 병소에 의해 계승 영구치가 심한 변위을 나타낸 경우, 적절한 치료를 통해 계승 영구치의 적절한 맹출을 유도할 수 있었기에 보고하는 바이다. Primary teeth and the permanent successor must be understood as interdependent units, where each one of them interacts with and depends upon the other. The spread of pulpal inflammation in primary teeth to the periradicular tissues can lead to early eruption, enamel hypoplasia or hypocalcification, developmental arrest of permanent successor. Also the periapical inflammation cause permanent tooth displacement in various direction. We describe here two clinical cases of displaced permanent successor caused by periapical lesion of mandibular primary molar in children.

가변구조 제어시스템의 Luenberger Observer에 관한 연구

탁한호,이형기,박양수,권세현 釜山工業大學校 1991 論文集 Vol.33 No.-

This paper presents an analysis of the stste observer-based robust speed control of a self-controlled synchonous motor (SCSM). A Variable structure control (VSC) technique is utilized to achieve robust (paramater-insensitive) characteristics. The speed and acceleration signals required for the implementation of the variable structure speed control (VSSC) are dynamically estimated with stste observer. One kind observer-the Luenberger full order observer-air explored in this paper. The results obtained that Luenverger observers do estimate the system ststes accurately when the system parameters vary. The design methods and the simulation results presented demonstrable the potential of the proposed scheme.

초등학교 과학 수업에서 팀 게임 토너먼트(TGT) 협동학습의 효과

고한중,양수경,한재영,노태희 한국초등과학교육학회 2003 초등과학교육 Vol.22 No.3

The purpose of this study was to develop a way of using Teams Games Tournaments that fits in elementary school science instruction, and to find out its effects on student's learning. Three classes (103 sixth graders) were divided into three groups; a traditional learning group, a cooperative learning group, and a teams games tournaments cooperative learning group. Students were taught about 'several kinds of gas' for nine class periods. The instructional effects upon student's achievement, science learning motivation and self-esteem toward science instruction were examined. The result of this study indicated that there was a significant interaction effect between the treatment and achievement level in the achievement test scores. The achievement test scores of the low level students were significantly higher in the teams games tournaments cooperative learning group than those in the traditional learning groups.

광폭하구에서의 오염물질 확신이송 모형 (BAYQUAL) 개발

류병로,한양수,두민호,유병연 大田産業大學校 1998 한밭대학교 논문집 Vol.15 No.1

The objective of this research is to develop the water quality simulation model (BAYQUAL) that deal with the physical and chemical aspects of rate/behavior of pollutants in the bay BAYQUAL is a two dimensional, time-variable finite element water quality model. This modeling system was designed to provide the generality and flexibility necessary for analyzing a verity of water quality problems in a diverse set of water bodies. The algorithm is composed of a hydrodynamic module(BAYQUAL) which solves the equations of motion and continuity, a pollutant dispersion module which solves the dispersion-advection equation. The applicability and feasibility of the model are discussed by applications of the model to the Kwangyang bay of South Coastal Waters of Korea. Based on the field data, the BAYQUAL model was calibrated and verified. The results were in good agreement with measured value within relative error of 3% for COD. Numerical simulations of velocity components and tide amplitude were agreed closely with the actual data.

용존산소농도 예측을 위한 추계학적 다중 입력모형

류병로,한양수,두민호,조성근 大田産業大學校 1998 한밭대학교 논문집 Vol.15 No.1

In the most cases we analyze a single time series without explicitly using information contained in the related time series In many forecasting situations, other events will systematically influence the series to be forecasted(the dependent variables), and therefore, there is need to go beyond a univariate forecasting model. Thus, we must build a forecasting model that incorporates more than one time series and introduces explicitly the dynamic characteristics of the system. Such a model in called a multiple time series model or transfer function model. The purpose of this study is to develop the stochastic stream water quality model of Puyea station in Keum river system. The performance of the multiplicative ARIMA model and the multiple input-single output transfer function model were examined through comparisons between the historical and generated monthly dissolved oxygen series. The result reveal that the multiple input-single output model lead to teh improved accuracy.

용존산소 농도 모의시 VARMA모형과 승법ARIMA모형의 비교특성

류병로,한양수 大田産業大學校 1999 한밭대학교 논문집 Vol.16 No.1

The purpose of this study is to develope optimizing method about long and short-term water quality to establish state space model for an accurate hydrologic forecasting using discharge data in river basin. Particularly, the paper focuses on application and feed flack interaction with state space model theory and forecasting optimization by assumption of one river basin system. First, for the P value of VAR(P) model to establish state space theory, it used AIC value by time step and VARMA model was established that it was findings to the constituent unit of state space model using canonical correction coefficients. Therefore this paper confirms that state space model is very significant related with optimization factors of VARMA model. Second, using the T-test results of the translation matrix [F] and input matrix [G] estimations of state space model, the value is zero about no significance and obvious state space model were obtained that the decreased parameter numbers were found to [F] and [G] of maximum likelihood function. Third, the results of comparison with computed and observed values in conformity with the rule of state space model showed a good results and the model were exhibited to high forecasting ability of water quality. Fourth, from the simulated results by the state space model, the model are suitable to forecasting the water qualities for similar to simulated and observed results.

소도시 하수의 최적처리공정에 관한 실험연구

류병로,한양수 大田産業大學校 1995 한밭대학교 논문집 Vol.12 No.1

The growth of population and industrialization has been increasing the discharge of wastewater and requiring more intensive eater treatment processes. This study was carried out to determine the optimal design conditions of a sewage treatmentplant in the small city of Keumsan. Also, we set out to find the operation guide data pertaining to the activated sludge process required by a city of this size. The biological reactors were operated with hydraulic retention times (HRT) of 8hrs, 6hrs and 4hrs respectively, at the temperature of 20±1℃, using a mixture of raw wastewater. From the results of the experiments, we found that the removal efficiency increased as the F/M ratio decreased. From this confusion we found that we could get the TBOD removal efficiency above 90% if the F/M ratio was less than 0.2Kg BOD/Kg MLSS-day. For the reaction conditions with a hydraulic retention time of 8hrs, the removal efficiencies of TBOD, SBOD, TKN and T-P were 92.4%, 92%, 87%, 67% and 49.3% respectively.

轉移函數 雜音模型을 利用한 月流出量 豫測

趙廷錫,韓良洙,金喜洛 대구대학교 과학기술연구소 1999 科學技術硏究 Vol.5 No.5

This model was based on the theory of Box-Jenkins multiplicative ARIMA (SARIMA) and the Transfer function to simulate changes of monthly runoff. The forecasting of Runoff from the pair of observed value of effective rainfall and runoff (X_(t), Y_(t)) in the uniform interval will gives less standard error then the analysis only by Y_(t), so the object of this study is more rational forecasting by the use of (X_(t) , Y_(t)). I analyzed the records of monthly runoff and effective rainfall, and applied the multiplicative ARIMA model and Transfer function-noise model. so I made it possible to do the long-term forecasting and got following results.