http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Kim, Young-Ju,Takikawa, Tetsutaro,An, Hui-Soo,Yoon, Jong-Hwan The Korean Society of Oceanography 2004 Journal of the Korean Society of Oceanography Vol.39 No.3
The variation of volume transport during the period from 1965 to 2000 through the western channel of the Korea Strait was estimated by obtaining an relation function between the ADCP volume transport and the geostrophic volume transport estimated by the sea level difference between Pusan and Izuhara. The estimated climatological mean volume transport during past 36 years has seasonal variation with a minimum of 1.15 Sv in February and a maximum of 1.88 Sv in October. The mean volume transport for 36 years is 1.51 Sv. The annual mean volume transport has an interannual variation with a minimum of 1.26 Sv in 1968 and maximum of 1.90 Sv in 1973, with three dominant periods of variations of 14.96 years, 4.96 years and 2.99 years.
境界要素法에 의한 波動場에 있어서 非線形波의 假想境界處理
金南亨,瀧川淸,崔漢圭 江原大學校 附設 環境硏究所 1991 環境硏究 Vol.8 No.-
본 연구는 境界要素法을 이용하여 非線形 自由表面波을 解析한 것으로 假想境界處理는 流體의 連續性을 고려하여 mass-flus와 energy-flux를 사용하여 有限振幅波動의 解析을 提示했다. 의 非線形性 때문에 增分法을 적용했으며 境界要素法에 의해 얻어진 結果는 有限要素法의 結果와 實驗値와 比較하여 보았으며 좋은 一致가 얻어졌다. 따라서, 이 方法은 廣範圍한 波動問題 解析에 유효하게 이용될 수 있으리라 사료된다. In this paper, boundary element method is applied to the analysis of nonlinear free surface wave. A particular concern is given to the treatment of the open boundaries at in-flow boundary and out-flow boundary, which uses the mass-flux and energy-flux considering the continuity of fluid. By assuming the fluid to be inviscid and incompressible and the flow to be irrotational, the problem is formulated mathematically as a two-dimentional nonlinear problem in terms of a velocity potential. The equaton(Laplace equation) and the boundary conditions are transformed into two boundary integral equations. Due to the nonlinearity of the problem, the incremental method is used for the numerical analysis. Numerical results obtained by the present boundary element method are compared with those obtained by the finite element method and also with experimental values.
Synthesis, Characterization, and Reactivity of Novel 6H-1,3,5-Oxathiazine S,S-Dioxides
Islam, M. R.,Takikawa, Y.,Lim, K. T. Wiley-Blackwell 2014 Journal of heterocyclic chemistry Vol.51 No.3
A series of novel 6H-1,3,5-oxathiazine S,S-dioxides were synthesized by the m-CPBA oxidation (2.2 equiv) of 6H-1,3,5-oxathizines. The synthetic utilities of the newly synthesized cyclic sulfones were investigated. In a thermal condition, compounds 6H-1,3,5-oxathiazine S,S-dioxides were found relatively stable, but Lewis acid-induced thermal reaction afforded the corresponding amides. The plausible pathway to amides from 6H-1,3,5-oxathiazine S,S-dioxides was also discussed in this account.
金南亨,瀧川淸,崔漢圭 江原大學校 産業技術硏究所 1990 産業技術硏究 Vol.10 No.-
In this paper the numerical method for the study of wave reflection from and transmission through submerged permcable breakwaters using the boundary element method is developed. The numerical analysis technique is based on the wave pressure function instead of velocity potential because it is difficult to define the velocity potential in the each region arising the energy dissipation. Also, the non-linear energy dissipation within the submerged porous structure is simulated by introducing the linear dissipation coefficient and the tag mass coefficient equivalent to the non-linear energy dissipation. For the validity of this analysis technique, the numerical results obtained by the present boundary element method are compared with those obtained by the other computation method. Good agreements are obtained and so the validity of the present numerical analysis technique is proved.
On the Sediment Transport Characteristics of the Bottom Turbulent Boundary Layer
김남형,키요시 타키카와,Kim, Nam Hyeong,Kiyoshi, Takikawa Korean Society of Civil Engeneers 1993 대한토목학회논문집 Vol.13 No.2
본 논문에서는 유한요소법을 2차원 난류경계층에 적용하였으며, 점성유체의 시간의존 비압축성 운동을 시간과 압력장(場)에서 Navier-Stokes방정식과 vorticity방정식을 이용하여 정식 화하였다. 수치계산방법은 Galerkin방법에 기초하였으며, 난류 경계층의 eddy kinematic viscosity에 대해서는 Prandtl의 혼합거리이론을 도입하였다. 난류 경계층에서 파동에 의한 임의 저면에서 저질의 이동을 수치계산하였다. 유한 요소법에 의해 얻어진 결과는 진동흐름에 의한 경계층과 파동에 의한 경계층에서의 특성의 차이를 분명히 하였다. A finite element method(FEM) is presented and applied to the two-dimensional bottom turbulent boundary layer. The time-dependent incompressible motion of a viscous fluid is formulated by using the well-known Navier-Stokes equations and vorticity equation in terms of the velocity and pressure fields. The general numerical formulation is based on Galerkin method and solved by introducing the mixing length theory of Prandtl for eddy kinematic viscosity of a turbulent flow field. Numerical computations of the transport of sediment on an arbitrary sea-bed due to wave motion in the turbulent boundary layer are carried out. The results obtained by the FEM made clear the difference in characteristic features between the boundary layer due to oscillatory flow and the boundary layer due to wave motion.
Young-Ju Kim,안희수,Tetsutaro Takikawa,Jong-Hwan Yoon 한국해양과학기술원 2004 Ocean science journal Vol.39 No.3
The variation of volume transport during the period from 1965 to 2000 through the western channel of the Korea Strait was estimated by obtaining an relation function between the ADCP volume transport and the geostrophic volume transport estimated by the sea level difference between Pusan and Izuhara. The estimated climatological mean volume transport during past 36 years has seasonal variation with a minimum of 1.15 Sv in February and a maximum of 1.88 Sv in October. The mean volume transport for 36 years is 1.51 Sv. The annual mean volume transport has an interannual variation with a minimum of 1.26 Sv in 1968 and maximum of 1.90 Sv in 1973, with three dominant periods of variations of 14.96 years, 4.96 years and 2.99 years.