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- Minoru SASAKI, Kenji KITA
- 1998

Document categorization, which is dened as the classication of text documents into one of several xed classes or categories, has become important with the explosive growth of the World Wide Web. The goal of the work described here is to automatically categorize Web documents in order to enable eective retrieval of Web information. In this paper, based on… (More)

Cantilevers fabricated by means of micromachining techniques are usually used for atomic force microscopy. In this paper, the spring constant of an atomic force microscope (AFM) cantilever is determined by using a large-scale cantilever. Since the spring constant of the large-scale cantilever is calibrated accurately, the spring constant of the AFM… (More)

- Hiroyuki Shinnou, Minoru Sasaki
- LREC
- 2008

Spectral clustering is a powerful clustering method for document data set. However, spectral clustering needs to solve an eigenvalue problem of the matrix converted from the similarity matrix corresponding to the data set. Therefore, it is not practical to use spectral clustering for a large data set. To overcome this problem, we propose the method to… (More)

- Minoru Sasaki, Hiroyuki Shinnou
- CW
- 2005

- Hiroyuki Shinnou, Minoru Sasaki
- ACL
- 2007

In this paper, we propose a new ensemble document clustering method. The novelty of our method is the use of Non-negative Matrix Factorization (NMF) in the generation phase and a weighted hypergraph in the integration phase. In our experiment, we compared our method with some clustering methods. Our method achieved the best results .

- Satoshi Ito, Tomohiro Kashima, Minoru Sasaki
- Eng. Appl. of AI
- 2010

This paper addresses a biped balancing task in which an unknown external force is exerted, using so-called 'ankle strategy' model. When an external force is periodic , a human adaptively maintains the balance, next learns how much force should be produced at the ankle joint from its repeatability, and finally memorized it as a motion pattern. To acquire… (More)

- Hiroyuki Shinnou, Minoru Sasaki
- CoNLL
- 2003

In this paper, we improve an unsuper-vised learning method using the Expectation-Maximization (EM) algorithm proposed by Nigam et al. for text classification problems in order to apply it to word sense disambigua-tion (WSD) problems. The improved method stops the EM algorithm at the optimum iteration number. To estimate that number, we propose two methods.… (More)

- Satoshi Ito, Yuuki Mizukoshi, Minoru Sasaki
- 2007 IEEE/RSJ International Conference on…
- 2007

When grasping an object, friction forces are sometimes utilized effectively. This friction forces allows us to manipulate the object to various directions. Regarding such a grasped object posture, we reported an analysis on the 2D-space grasping with two contact points. Selecting the square sum of the contact forces as an evaluation function of the object… (More)

- Satoshi Ito, Yuuki Mizukoshi, Koji Ishihara, Minoru Sasaki
- 2006 IEEE/RSJ International Conference on…
- 2006

When grasping an object, friction forces are sometimes utilized. Because of this friction forces, the object is manipulable to various direction. In this paper, we discuss which direction is best when contact points, the number of which is two in the 2D-space grasping or three in the 3D one, are assigned. To evaluate the object direction, we focus on the… (More)

- Satoshi Ito, Shinya Amano, Minoru Sasaki, Pasan Kulvanit
- JCP
- 2008

— Many biped robot control schemes adopt a zero moment point (ZMP) criterion, where the motion is initially planned as the positional trajectories such that ZMP stays within the support polygon, while the feedback control of each joint is later applied to follow the planned reference motion. Although this method is powerful, the ZMP is not always controlled… (More)