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27 results on '"Tseng, Tzu-Wei"'

2. An Interpretable Compression and Classification System: Theory and Applications

Author

Tseng, Tzu-Wei, Yang, Kai-Jiun, Kuo, C. -C. Jay, Shang-Ho, and Tsai

Subjects
Computer Science - Computer Vision and Pattern Recognition, Electrical Engineering and Systems Science - Signal Processing
Abstract

This study proposes a low-complexity interpretable classification system. The proposed system contains three main modules including feature extraction, feature reduction, and classification. All of them are linear. Thanks to the linear property, the extracted and reduced features can be inversed to original data, like a linear transform such as Fourier transform, so that one can quantify and visualize the contribution of individual features towards the original data. Also, the reduced features and reversibility naturally endure the proposed system ability of data compression. This system can significantly compress data with a small percent deviation between the compressed and the original data. At the same time, when the compressed data is used for classification, it still achieves high testing accuracy. Furthermore, we observe that the extracted features of the proposed system can be approximated to uncorrelated Gaussian random variables. Hence, classical theory in estimation and detection can be applied for classification. This motivates us to propose using a MAP (maximum a posteriori) based classification method. As a result, the extracted features and the corresponding performance have statistical meaning and mathematically interpretable. Simulation results show that the proposed classification system not only enjoys significant reduced training and testing time but also high testing accuracy compared to the conventional schemes., Comment: 12 pages, 12 figures and 5 tables

Published
2019

7. Dynamic molecular conformational change leading to energy transfer in F8-5% BSP copolymer revealed by single-molecule spectroscopy.

Author

Yan, Hao, Tseng, Tzu-Wei, Omagari, Shun, Hamilton, Iain, Nakamura, Tomonori, Vacha, Martin, and Kim, Ji-Seon

Subjects
*ENERGY transfer, *PHENYLENEDIAMINES, *SPECTROMETRY, *MOLECULAR conformation, *DENSITY functional theory, *EXCITED states, *MOLECULAR spectroscopy
Abstract

Polyfluorene-based copolymers such as poly(9,9-dioctylfluorene)-alt-5% [bis-N,N′-(4-butylphenyl)-bis-N,N′-phenyl-1,4-phenylenediamine] (F8-5% BSP) are efficient blue-emitting polymers with various electronic phases: F8 blue-emitting glassy phase, F8 ordered more red-emitting β-phase, and F8/BSP charge transfer (CT) state. Polymer light-emitting device performance and color purity can be significantly improved by forming β-phase segments. However, the role of the β-phase on energy transfer (ET) among glassy F8, β-phase, and F8/BSP CT state is unclear. Herein, we identify dynamic molecular conformation-controlled ET from locally excited states to either the CT state or β-phase in light-emitting copolymers. By conducting single-molecule spectroscopy for single F8-5% BSP chains, we find inefficient intra-chain ET from glassy segments to the CT state, while efficient ET from the glassy to the β-phase. Spontaneous and reversible CT on–off emission is observed both in the presence and absence of the β-phase. The density functional theory calculations reveal the origin of the on-chain CT state and indicate this CT emission on–off switching behavior could be related to molecule torsional motion between BSP and F8 units. The population of the CT state by ET can be increased via through-space interaction between the F8 block and the BSP unit on a self-folded chain. Temperature-dependent single-molecule spectroscopy confirms such interaction showing a gradual increase in intensity of the CT emission with the temperature. Based on these observations, we propose the dynamic molecular motion-induced conformation change as the origin of the glassy-to-CT ET, and thermal energy may provide the activation for such a change to enhance the ET from glassy or β-phases to the CT state. [ABSTRACT FROM AUTHOR]

Published
2022
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14. A Precision Health Service for Chronic Diseases: Development and Cohort Study Using Wearable Device, Machine Learning, and Deep Learning

Author

Wu, Chia-Tung, primary, Wang, Ssu-Ming, additional, Su, Yi-En, additional, Hsieh, Tsung-Ting, additional, Chen, Pei-Chen, additional, Cheng, Yu-Chieh, additional, Tseng, Tzu-Wei, additional, Chang, Wei-Sheng, additional, Su, Chang-Shinn, additional, Kuo, Lu-Cheng, additional, Chien, Jung-Yien, additional, and Lai, Feipei, additional

Published
2022
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15. Influence of land tenure interventions on human well-being and environmental outcomes

Author

Tseng, Tzu-Wei Joy; Robinson, Brian E.; Bellemare, Marc F.; BenYishay, Ariel; Blackman, Allen; Zhang, Wei, http://orcid.org/0000-0002-2933-6275 Zhang, Wei, Tseng, Tzu-Wei Joy; Robinson, Brian E.; Bellemare, Marc F.; BenYishay, Ariel; Blackman, Allen; Zhang, Wei, and http://orcid.org/0000-0002-2933-6275 Zhang, Wei

Abstract

PR, IFPRI3; ISI; CRP2; 5 Strengthening Institutions and Governance, EPTD; PIM, CGIAR Research Program on Policies, Institutions, and Markets (PIM)

Published
2021

16. Influence of land tenure interventions on human well-being and environmental outcomes

Author

Tseng, Tzu-Wei Joy, primary, Robinson, Brian E., additional, Bellemare, Marc F., additional, BenYishay, Ariel, additional, Blackman, Allen, additional, Boucher, Timothy, additional, Childress, Malcolm, additional, Holland, Margaret B., additional, Kroeger, Timm, additional, Linkow, Benjamin, additional, Diop, Moustapha, additional, Naughton, Lisa, additional, Rudel, Thomas, additional, Sanjak, Jolyne, additional, Shyamsundar, Priya, additional, Veit, Peter, additional, Sunderlin, William, additional, Zhang, Wei, additional, and Masuda, Yuta J., additional

Published
2020
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27. Paradoxical Aging Changes of the Atrioventricular Nodal Properties in Patients With Atrioventricular Nodal Re-Entrant Tachycardia

Author

Tseng, Tzu-Wei, primary, Hu, Yu-Feng, additional, Tsai, Chin-Feng, additional, Tsao, Hsuan-Ming, additional, Tai, Ching-Tai, additional, Lin, Yenn-Jiang, additional, Chang, Shih-Lin, additional, Lo, Li-Wei, additional, Lee, Pi-Chang, additional, Li, Cheng-Hung, additional, Chao, Tze-Fan, additional, Suenari, Kazuyoshi, additional, Lin, Yung-Kuo, additional, Chiang, Chern-En, additional, and Chen, Shih-Ann, additional

Published
2011
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