Search

Your search keyword '"Kawase, Tetsuya"' showing total 13 results
Start Over Author "Kawase, Tetsuya"
13 results on '"Kawase, Tetsuya"'

1. Epidemic Myalgia Associated with Human Parechovirus Type 3 Infection

Author

Miyazaki, Moemi, primary, Hara, Kenta, additional, Takayoshi, Tomofumi, additional, Kawase, Tetsuya, additional, Nakagawa, Yasushi, additional, Arai, Takashi, additional, Sugimoto, Takeshi, additional, Nishiyama, Katsuhito, additional, Gonzalez, Gabriel, additional, Hanaoka, Nozomu, additional, Fujimoto, Tsuguto, additional, Yasutomo, Yoshiro, additional, and Yokono, Koichi, additional

Published
2020
Full Text
View/download PDF

2. Confidence estimation and keyword extraction from speech recognition result based on Web information

Author

Hayamizu Satoru, Kawase Tetsuya, Hara Kensuke, Sekiya Hideki, and Tamura Satoshi

Subjects
Web search query, business.industry, Computer science, Speech recognition, Keyword extraction, Pointwise mutual information, computer.software_genre, Document processing, Web information, Noun, Speech analytics, The Internet, Artificial intelligence, business, computer, Natural language processing
Abstract

This paper proposes to use Web information for confidence measure and to extract keywords for speech recognition results. Spoken document processing has been attracting attention particularly for information retrieval and video (audiovisual) content systems. For example, measuring a confidence score which indicates how likely a document or a segmented document includes recognition errors has been studied. It is well known keyword extraction from recognition results is also an important issue. For these purposes, in this paper, pointwise mutual information (PMI) between two words is employed. PMI has been used to calculate a confidence measure of speech recognition, as a coherence measure by co-occurrence of words. We propose to further improve the method by using a Web query expansion technique with term triplets which consist of nouns in the same document. We also apply PMI to keyword estimation by summing a co-occurrence score (sumPMI) between a targeting keyword candidate and each term. The proposed methods were tested with 10 lectures in Corpus of Spontaneous Japanese (CSJ) and 2 simulated movie dialogues. In the experiments it is shown that the estimated confidence score has high relationship with recognition accuracy, indicating the effectiveness of our method. And sumPMI scores for keywords have higher values in the subjective tests.

Published
2013

13. A Kalman tracker with a turning acceleration estimator.

Author

Kawase, Tetsuya, Tsurunosono, Hideshi, Ehara, Naoki, and Sasase, Iwao

Subjects
*KALMAN filtering, *DISTRIBUTION (Probability theory), *CONTROL theory (Engineering), *ESTIMATION theory, *SIMULATION methods & models, *ANTENNAS (Electronics), *GAUSSIAN processes
Abstract

In tracking systems using phased array antennas, the simple Kalman filter has been employed due to the development of high-speed computers in recent years. The Kalman filter performs almost perfect tracking when a target takes a straight course. However, the quality of the Kalman filter degrades significantly for maneuvering targets since the statistics of acceleration are assumed to be a white Gaussian process in the filter. The Kalman tracker with a simple input estimator and the two-stage Kalman estimator have been proposed for maneuvering target tracking that uses the residuals to estimate the target acceleration and that requires no a priori information of the magnitude of the maneuver. However, the estimate of the acceleration might not be accurate in the case that the residues increase dramatically such as the circular turn. In this paper, a Kalman tracker with a turning acceleration estimator is proposed that estimates the turning acceleration directly from the feature of the maneuvering target trajectory. A computer simulation is performed for various target profiles to show the effectiveness of the proposed tracker as compared with conventional trackers. © 2000 Scripta Technica, Electron Comm Jpn Pt 1, 84(1): 1–11, 2001 [ABSTRACT FROM AUTHOR]

Published
2001
Full Text
View/download PDF

Catalog

Books, media, physical & digital resources
See catalog results