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鄭斗永 전북대학교 공업기술연구소 1981 工學硏究 Vol.11 No.-
In soil engineering, stuructual characterics of soils are the relationship between physical-chemical and constructional properties. This study of the microstructure of loess soil in the easten area of korea, for evaluatation of thier stuructual characteristics and the microstructure of loess soil, was studied by usc of X-Ray diffraction and scaning electron microcsopy. with the structual characteristics of this loess soil showing the following results. 1.This loess is a sandy loam type of fine sand which is irregular and kaolinite clay could be confirmed as present 2.in this loess soil, a water solution and chloirde not less than that in the loess materials and main mineraloge are quartz or muscovite or kaolinite clay. 3.Under condolidation of this loess, a glnuar fabric unit be confirmed by an orientation of X-Ray diffraction.
CROSS-HOLE TEST에 의한 해안매립지반의 동적지반특성 평가
鄭斗永,이희명 全北大學校 1992 論文集 Vol.34 No.-
In this study, dynamic soil properties were evaluated by the result of crosshole test in marine fill ground. As a result, First, shear wave velocity were measured to 200-1000m/ sec in soil layer and 1,100-2,000m/ sec in rock layer from these crosshole test then, soil characteristics were studied by the elastic wave velocity.Second, the correlations between N-value and shear modulus were established through the regression analysis. Third, the representative design value of the soil were determined by the first approximation method of probatility analysis of the test results. These results are considered to have a good reliability.
Monte Carlo Method를 利用한 독립후팅 沈下의 信賴度 解析
鄭斗永,吳秉炫 全北大學校 1993 論文集 Vol.36 No.-
In the settlement analysis of shallow foundation, soil properties and loads involve many uncertainties so it is necessary to do analysis of settlement that considers the probabilistic properties of each variable. This study is performed to reliability analysis for settlement of individual footing by using Monte Carlo Simulation Method. To consider the uncertainty of variables, both the soil properties and loads are assumed to be normal distribution random variables. Then it is performed to do sensitivity analysis which is involved to excess probability of allowable criteria of maximum settlement according to variety of each variable. It is thougth to be proper that the settlement analysis of shallow foundation should be analyzed considering uncertainty of variables.
정두영 거제전문대학 1997 論文集 Vol.5 No.-
This paper presents a fast estimation algorithm of the optical flow by using the multilevel pyramid structure. The proposed algorithm is based on the block matching methods. This algorithm can reduce greatly the computational complexity of the conventional BMAs (Three Step Search, Direction of Minimum Distortion). Computer simulation shows that the proposed algorithm is fast & good performance efficiency in terms of PSNR.
鄭斗永,羅景俊 전북대학교 공업기술연구소 1986 工學硏究 Vol.17 No.-
This paper describes the characteristics of Normally-consolidated marine clay taken from the alluvion around kusan innerport. Under different load-increment ratios of 0.5, 1.0, 3.0, respectively, the variations of consolidation constants with load-pressure increment are compared. Correlation equations from the relationships between consolidation constants and physical properties of Normally-consolidated marine clay can be obtained. And also the different properties between sandy-clays and silty-clays through consolidation test can be identified. The main results obtained from this study are as follows. 1) In normally-consolidated marine clay, larger load increment ratio results in larger coefficient of consolidation and sandy-clays showed larger variation width than silty-clays. 2) Correlation for the compression index(Cc) with the liquid limit(W_L) was similar to skempton's correlation. 3) In normally-consolidated marine clay, compression index(Cc) increased with the increase of natural moisture contents.
정두영 거제전문대학 1999 論文集 Vol.8 No.-
This paper presents a stereo matching using Energy-Based Method. The Energy-based Method consists of expressing the correspondence problems as a minimization and regularization one. The computation of stereo disparity is a mathematically ill-posed problem. To overcome the ill-posed problems, Regularization theory provides an approach to make the problem well-posed by imposing additional constraints on the solution. An iterative solution of the discrete version of the associated Euler-Lagrange equation is then used in order to estimate disparity. Once the disparity map is obtained, it is used as the initial condition for the discontinuity information needed for the next discontinuity-preserving regularization.