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Motion Control in Mechatronics Devices
Nobuhiro Kyura 대한전자공학회 1992 대한전자공학회 학술대회 Vol.1992 No.10
This paper describes motion control system applied to mechatronics devices. It is pointed out that a new approach is necessary to realize a good performance motion control. At first, a motion controller of mechatronics devices is introduced. The controller is constructed from four layer of hierarchical structure. After that two practical examples are presented to introduce the new approach to advanced motion control exactly.
A free $\Zp$-action and the Seiberg-Witten invariants
Nobuhiro Nakamura 대한수학회 2002 대한수학회지 Vol.39 No.1
We consider the situation that Zp = Z/pZ acts freelyon a closed oriented 4-manifold X with b_2^+ geq 2.In this situation, we study the relation between theSeiberg-Witten invariants of X and those of the quotientmanifold X / Zp. We prove that the invariants of X areequal to those of X / Zp modulo p.
Identification of Nonlinear Dynamics of Aircraft via Nonlinear Programming
Nobuhiro Yokoyama,Yoshimasa Ochi,Masahito Watanabe 한국항공우주학회 2008 한국항공우주학회 학술발표회 논문집 Vol.- No.-
This paper describes a new method for the identification of aircraft dynamics which is expressed by nonlinear state and observation equations with unknown parameters. The developed method adopts a nonlinear programming technique incorporated with the direct collocation, and accounts for both process and measurement noise through maximizing a likelihood. One of the advantages of the developed method is its stable convergence due to circumventing the recursive integration of state equations. The other advantage is its flexibility to handle wide-range of problems without software modifications. The developed method even covers the problem including equality or inequality conditions on unknown parameters and those with multiple flight test data. The effectiveness of the developed method is demonstrated by applying it to a simple benchmark problem to identify an unknown parameter of a reentry body and to a problem to identify the nonlinear dynamics of a paraglider based on multiple flight test data.
Predictors of Poor Outcome in Patients with Acute Cerebral Infarction
Nobuhiro Dougu,Shutaro Takashima,Etsuko Sasahara,Yoshiharu Taguchi,Shigeo Toyoda,Tadakazu Hirai,Takashi Nozawa,Kortaro Tanaka,Hiroshi Inoue 대한신경과학회 2011 Journal of Clinical Neurology Vol.7 No.4
Background and Purpose Plasma D-dimer levels are elevated during the acute phase of cerebral infarction (CI). We investigated whether the D-dimer level on admission and other clinical characteristics could be used to predict the poor outcome of patients with acute CI. Methods The clinical characteristics and plasma D-dimer levels measured within 3 days of onset were compared according to outcome among patients with acute CI. Results In total, 359 consecutive patients (mean age, 71.8 years) were examined, of which 174 had a poor outcome [score on the modified Rankin scale (mRS) ≥3] at 30 days after hospitalization. The mean mRS score was higher and a poor outcome was observed more frequently among women than among men (p<0.001 for each). The proportions of women, cardioembolism, atrial fibrillation, advanced age (≥75 years), prior history of CI or transient ischemic attack, and elevated D-dimer level (≥1.0 μg/mL) were significantly higher among patients with a poor outcome than among those with a good outcome. A multivariate analysis showed that elevated D-dimer level [≥1.0 μg/mL; odds ratio (OR), 2.45; 95% confidence interval (95% CI),1.52-3.89; p<0.01], advanced age (OR, 1.93; 95% CI, 1.21-3.07; p<0.01), and female gender (OR, 1.75; 95% CI, 1.08-2.83; p=0.02) were independent predictors of a poor outcome. Conclusions Certain clinical characteristics (gender and advanced age) and an elevated Ddimer level upon admission can be used to predict the outcome of patients with acute CI at 30 days after hospitalization.