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We study on the modeling and solution of practical airline crew scheduling problems. The problem determines a feasible assignment of flight duties to the set of crews. Two types of integer programming formulations with cell model and graph models are developed. An efficient solution algorithm based on labeling algorithm is proposed. The validity of the proposed models is compared by using a general-purpose...
This paper proposes an efficient speech sample selection technique that can identify those samples that will be well recognized. Conventional confidence measures can identify well-recognized speech samples, but they require speech recognition to estimate confidence scores. Speech samples with low confidence should not undergo recognition since they yield speech documents that will eventually be rejected...
This paper describes TCP/IP visualization tools for students who plan to become communication and computer engineers. TCP/IP protocols are fundamental for computer networks and the Internet. For this reason, communication and computer engineers have to learn the protocols. However, learning the protocols is difficult, because students cannot fully understand or gain experience with the protocols by...
The recent increasing demand for 3D digital contents has motivated us to develop techniques for watermarking 3D models so that we can hide copyright information behind them. However, existing methods rather focused on the robustness against possible attacks to destroy the embedded watermarks, and have not fully taken care of the associated influence on the visual quality of the target 3D models. In...
Users require rapid and highly accurate speech recognition systems. Accuracy could be improved by unsupervised adaptation as provided by CMLLR (Constrained Maximum Likelihood Linear Regression). CMLLR-based batch-type unsupervised adaptation estimates a single global transformation matrix by utilizing unsupervised labeling; unfortunately, it needs prior labeling and so is not rapid. Our proposed technique...
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