http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Masashi Yamamoto,Kazuhiro Yubai,Junji Hirai 제어로봇시스템학회 2011 제어로봇시스템학회 국제학술대회 논문집 Vol.2011 No.10
The H∞ loop-shaping method is known to be an effective control method, however, it has two drawbacks. The first is that it is difficult to select appropriate loop-shaping weights, and the second is that the resulting controller is very complex. For the first drawback, Lanzon has proposed a suboptimal loop-shaping weight design method. It is formulated as a generalized eigenvalue minimization problem. This suboptimal loop-shaping weight design method provides high order weights, emphasizing the second drawback. To resolve these two drawbacks, a reduced-order loop-shaping weight and a stabilizing controller design methods are proposed in this paper. In the proposed method, the weight structure is first fixed, and the weight is decomposed into the frequency-dependent vector and the parameter matrices characterizing the loop-shaping weight. Since the open-loop constraints are represented as linear matrix inequalities with respect to the parameter matrices, the reduced-order loop-shaping weight design problem is formulated as a generalized eigenvalue minimization problem as well as the Lanzon’s suboptimal loop-shaping weight design method. Moreover, the stabilizing controller is first fixed to the initial stabilizing controller. The initial stabilizing controller is designed for the shaped plant obtained by the reduced-order weight design, by solving linear matrix inequalities. The proposed method can reduce the designer’s burden. The effectiveness of the proposed method is verified experimentally by the gain-scheduling control of a vertical-type inverted pendulum system.
Yamamoto, Masashi,Nakamura, Kazuyuki KNU The Institute of ManagementEconomy Research 2016 Asia-Pacific Journal of Business Vol.7 No.2
Japan's new local revitalization plan is unique in that the national government has asked local governments to form their own initiatives; and we can expect that there will be various ideas from the perspectives of local residents. However, it is important to note that not all local governments considered the actions of their competitors and neighboring governments. Currently, Japanese industries are so interconnected that we cannot ignore the actions of others. In this paper, we propose a simple indicator that policy makers can use to determine the focus for the local economy.
Masashi Yamamoto,Kazuyuki Nakamura 강원대학교 경영경제연구소 2016 Asia-Pacific Journal of Business Vol.7 No.2
Japan’s new local revitalization plan is unique in that the national government has asked local governments to form their own initiatives; and we can expect that there will be various ideas from the perspectives of local residents. However, it is important to note that not all local governments considered the actions of their competitors and neighboring governments. Currently, Japanese industries are so interconnected that we cannot ignore the actions of others. In this paper, we propose a simple indicator that policy makers can use to determine the focus for the local economy.
On the Cost Structures of the End-of-life Product Logistics
Masashi Yamamoto 인하대학교 정석물류통상연구원 2011 JOURNAL OF INTERNATIONAL LOGISTICS AND TRADE Vol.9 No.2
This paper analyzes the cost structure of the municipal waste collection in Japan. Since the municipality in Japan is responsible for dealing with the garbage generated by households, there is plenty of data regarding municipal waste in comparrison to private firms. Nevertheless, there is little research available which analyzes the end-of-life product logistics of municipal waste. This research aims to reveal some structural features of the end-of-life product logistics cycle. Based on more than 1,800 samples, this paper statistically shows that both waste collection and waste processing have a strong scale economy. In addition, this paper will also prove that the consignment to the private entity has made the cost of waste management cheaper in Japan.
Two Externalities in Auto Transport
Masashi Yamamoto,Yuichiro Yoshida 인하대학교 정석물류통상연구원 2009 인하대학교 정석물류통상연구원 학술대회 Vol.2009 No.11
Facing the rise of environmental concern drivers on the road are now opting to own a more environmentally-friendly cars This paper introduces a new type of user heterogeneity to a classic two-mode problem;drivers are different in terms of the fuel efficiency of the cars they drive. This paper introduces a new perspective to the classic two-mode problem by adding using user heterogeneity in terms of fuel efficiency of the cars they drive. In the case of the first best, it is confirmed that the anonymity principle still applies in a way that the toll should be the same between these two groups of drivers, equaling to the marginal external costs. Following the first best analysis, the paper investigats the second-best with unpriced city streets. It is shown that the price of a highway trip is now different from its social marginal cost, and that the direction of this deviation from the social marginal cost is opposite depending on the type of the car.
Yamamoto, Masahito,Iwadate, Kenji,Ooe, Ryosuke,Suzuki, Ikuo,Furukawa, Masashi Society for Computational Design and Engineering 2009 International Journal of CAD/CAM Vol.9 No.1
In this paper, we demonstrate an autonomous design of motion control of virtual creatures (called animated robots in this paper) and develop modeling software for animated robots. An animated robot can behave autonomously by using its own sensors and controllers on three-dimensional physically modeled environment. The developed software can enable us to execute the simulation of animated robots on physical environment at any time during the modeling process. In order to simulate more realistic world, an approximate fluid environment model with low computational costs is presented. It is shown that a combinatorial use of neural network implementation for controllers and the genetic algorithm (GA) or the particle swarm optimization (PSO) is effective for emerging more realistic autonomous behaviours of animated robots.
Iwamoto, Masashi,Watanabe, Miki,Yamamoto, Masae,Narita, Masato,Kamio, Takashi,Takaki, Takashi,Shibahara, Takahiko,Katakura, Akira Korean Association of Maxillofacial Plastic and Re 2019 Maxillofacial Plastic Reconstructive Surgery Vol.41 No.-
Background: Le Fort I osteotomy is one of the surgical procedures now routinely and safely performed. It is possible to move the maxilla in three dimensions, but it is necessary to separate the bones around the maxillary sinus. Therefore, with surgery, maxillary sinus mucosal thickening occurs. By knowing the changes in the sinus mucosa after surgery and the factors affecting it, it is possible to better predict the outcomes of surgery and contribute to safer surgery. In this study, thickening of maxillary sinus mucosa before and after surgery in Le Fort I osteotomy was evaluated using multidetector-row computed tomography (MDCT) images, and the changes in mucosal thickening and the related factors were examined. Methods: Using MDCT images, the maxillary sinus mucosa of 125 patients who had undergone Le Fort I osteotomy was retrospectively evaluated before surgery, 1 month after surgery, and 1 year after surgery. On the MDCT images, the maxillary sinus was judged as mucosal thickening and classified into three grades according to the proportion occupying the maxillary sinus. In the evaluation of factors related to mucosal thickening, the following eight factors were examined: sex, age, diagnosis, operating time, amount of postoperative bleeding, with/without bone graft, with/without multisegmental osteotomy, and with/without macrolide therapy after surgery. Results: The mean age at the time of surgery was 25.6 ± 8 years. Of all 125 patients, 66 had bilateral thickening, 19 had unilateral thickening, and 40 had no thickening. Factors that were significantly related to mucosal thickening were the operative time for the maxilla, bone grafts, and macrolide therapy after surgery. Conclusions: Operative time for the maxilla, bone grafts, and macrolide therapy after surgery were found to be related to mucosal thickening. In addition, MDCT scanning 1 month after surgery was considered to be appropriate for evaluation of maxillary sinus mucosal thickening.