http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
이재엽,이상중,한인섭,Lee, Jai-Yeop,Lee, Sangjung,Han, Ihnsup Korean Society of Soil and Groundwater Environment 2013 지하수토양환경 Vol.18 No.3
Adsorption of melamine was examined using columns packed with granular activated carbon (GAC). Raw GAC was sieved with 20, 40, 60 and 80 mesh to determine the influence of adsorbent particle size on reaction and diffusion. The mass ratio of the adsorption capacity of GAC for melamine ranged from 9.19 to 11.06%, and adsorption rates increased with decreasing particle size within this range. Rate constants between 3.295 ~ 4.799 $min^{-1}$ were obtained using a pseudofirst-order equation that was used to determine adsorption kinetics. A surface diffusion model was adapted to take into account the unsteady-state equation of a spherical adsorbent by converting the surface concentration from a constant to a variable governed by a dispersion equation. The calculated values were fit with the experimental results by using the diffusion coefficients as regression parameters. The modified equation exhibited a more precise agreement with respect to the sum of the absolute error (SAE).
윤장원(Yoon Jangwon),이기원(Lee Kiwon),김주락(Kim Joorak),이상중(Lee Sangjung),창상훈(Chang Sanghoon) 한국철도학회 2001 한국철도학회 학술발표대회논문집 Vol.- No.-
The maximum span length is decided by the relation among the independent factors of rail, train and catenary. However, During the calculation of the maximum span length with the way of Kyung-Bu High railway design using by the commercial program 「MATLAB」 the mathematical error was founded. Therefore, this paper presents the analysis of the reason why caused the mathematical error occur.