박현우 교수

Abstract This paper presents a geometric mean scheme (GMS) to determine an optimal regularization factor for Tikhonov regularization technique in the system identification problems of linear elastic continua. The characteristics of non‐linear inverse problems and the role of the regularization are investigated by the singular value decomposition of a sensitivity matrix of responses. It is shown that the regularization results in a solution of a generalized average between the a priori estimates

Soya bean (Glycine max (L.) Merr.) is sought after for both its oil and protein components. Genetic approaches to add value to either component are ongoing efforts in soya bean breeding and molecular biology programmes. The former is the primary vegetable oil consumed in the world. Hence, its primary usage is in direct human consumption. As a means to increase its utility in feed applications, thereby expanding the market of soya bean coproducts, we investigated the simultaneous displacement of

Abstract This paper presents a new class of regularization functions and the associated regularization scheme for structural system identification. In particular, 1‐norm regularization functions are investigated to overcome the smearing effect of 2‐norm regularization functions for the identification of discontinuous system parameters of structures. The truncated singular value decomposition is employed to filter out noise‐polluted solution components and to impose the 1‐norm regularization func

An economically efficient one-step lactide synthesis process has been developed by using a low-price commercialized catalyst of SiO2/Al2O3 in a packed-bed reactor. Under the optimized conditions of preheater temperature 160 °C, reactor temperature 240 °C, and WHSV 3 h–1, 90% lactic acid conversion and 99% lactide selectivity were obtained. Filling of glass beads underneath the catalyst bed proved to be quite effective in improving reaction performance. The catalyst stably maintained its activity

Removal kinetics for NO and SO₂ by NaClO₂ solution mist were investigated in a wet electrostatic precipitator. By varying the molar concentrations of NO, SO₂, and NaClO₂, the removal rates of NO and SO₂ confirmed to range from 34.8 to 72.9 mmol/m³ s and 36.6 to 84.7 mmol/m³ s, respectively, at a fixed gas residence time of 0.25 s. The rate coefficients of NO and SO₂ were calculated to be 0.679 (mmol/m<sup>3</

Soybean (Glycine max (L.) Merr) is valued for both its protein and oil, whose seed is composed of 40% and 20% of each component, respectively. Given its high percentage of polyunsaturated fatty acids, linoleic acid and linolenic acid, soybean oil oxidative stability is relatively poor. Historically food processors have employed a partial hydrogenation process to soybean oil as a means to improve both the oxidative stability and functionality in end-use applications. However, the hydrogenation pr