An optimization method of LNT aftertreatment system based on discrete approximation by Mitsuru TOYODA, Tielong SHEN

“…This paper presents an optimal control design approach for LNT aftertreatment system in diesel engines. First, based on the observation of physics of the system, a dynamical model is constructed to represent the NOx reduction behavior under the air-fuel ratio changes. …”
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Study on the motion analysis of three-dimensional ball mills by Masanari OKUNO, Masayoshi WADA

“…In this study, we focused on the mechanism of suppressing the critical condition. First, based on the past study for ordinary ball mills, we created a theoretical formula for three-dimensional ball mills in critical condition. …”
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Control method for shifting the natural frequency of vibration system coupled by springs by Masashi KOMADA, Yuichi MATSUMURA, Ichiro KIDO, Eiji NAKATSUGAWA, Hironori OZAKI

“…For this background, this paper proposes a new method for shifting the natural frequency of coupled two vibration systems which are connected at multi-points by coupling springs assuming semi-active control. Firstly, based on the sub-structuring method, the relation between column vectors in the compliance matrix at connection points of two systems is analyzed to make clear the condition of resonance occurrence. …”
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Theoretical analysis of shear buckling stress in torsion of thin-walled square cross-section beams by Katsuya FURUSU, Tatsuyuki AMAGO

“…So, the purpose of this paper is to theoretically determine the shear buckling stress in torsion of a thin-walled square beam of finite length. First, based on the previous process, two adjacent plates are considered to be a single plate, and the buckling mode is represented by an infinite Fourier series as in the shear buckling of a single plate. …”
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