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Your search keyword '"Hong, W. Y."' showing total 17 results
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17 results on '"Hong, W. Y."'

1. CholecSeg8k: A Semantic Segmentation Dataset for Laparoscopic Cholecystectomy Based on Cholec80

Author

Hong, W. -Y., Kao, C. -L., Kuo, Y. -H., Wang, J. -R., Chang, W. -L., and Shih, C. -S.

Subjects
Computer Science - Computer Vision and Pattern Recognition
Abstract

Computer-assisted surgery has been developed to enhance surgery correctness and safety. However, researchers and engineers suffer from limited annotated data to develop and train better algorithms. Consequently, the development of fundamental algorithms such as Simultaneous Localization and Mapping (SLAM) is limited. This article elaborates on the efforts of preparing the dataset for semantic segmentation, which is the foundation of many computer-assisted surgery mechanisms. Based on the Cholec80 dataset [3], we extracted 8,080 laparoscopic cholecystectomy image frames from 17 video clips in Cholec80 and annotated the images. The dataset is named CholecSeg8K and its total size is 3GB. Each of these images is annotated at pixel-level for thirteen classes, which are commonly founded in laparoscopic cholecystectomy surgery. CholecSeg8k is released under the license CC BY- NC-SA 4.0., Comment: 6 pages

Published
2020

2. Synchronization of Geodesic Acoustic Modes and Magnetic Fluctuations in Toroidal Plasmas

Author

Zhao, K. J., primary, Nagashima, Y., additional, Diamond, P. H., additional, Dong, J. Q., additional, Itoh, K., additional, Itoh, S.- I., additional, Yan, L. W., additional, Cheng, J., additional, Fujisawa, A., additional, Inagaki, S., additional, Kosuga, Y., additional, Sasaki, M., additional, Wang, Z. X., additional, Wei, L., additional, Huang, Z. H., additional, Yu, D. L., additional, Hong, W. Y., additional, Li, Q., additional, Ji, X. Q., additional, Song, X. M., additional, Huang, Y., additional, Liu, Yi., additional, Yang, Q. W., additional, Ding, X. T., additional, and Duan, X. R., additional

Published
2016
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3. Dynamics of Low-Intermediate–High-Confinement Transitions in Toroidal Plasmas

Author

Cheng, J., primary, Dong, J. Q., additional, Itoh, K., additional, Yan, L. W., additional, Xu, M., additional, Zhao, K. J., additional, Hong, W. Y., additional, Huang, Z. H., additional, Ji, X. Q., additional, Zhong, W. L., additional, Yu, D. L., additional, Itoh, S.-I., additional, Nie, L., additional, Kong, D. F., additional, Lan, T., additional, Liu, A. D., additional, Zou, X. L., additional, Yang, Q. W., additional, Ding, X. T., additional, Duan, X. R., additional, and Liu, Yong, additional

Published
2013
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4. Frequency-Resolved Nonlinear Turbulent Energy Transfer into Zonal Flows in Strongly HeatedL-Mode Plasmas in the HL-2A Tokamak

Author

Xu, M., primary, Tynan, G. R., additional, Diamond, P. H., additional, Manz, P., additional, Holland, C., additional, Fedorczak, N., additional, Thakur, S. Chakraborty, additional, Yu, J. H., additional, Zhao, K. J., additional, Dong, J. Q., additional, Cheng, J., additional, Hong, W. Y., additional, Yan, L. W., additional, Yang, Q. W., additional, Song, X. M., additional, Huang, Y., additional, Cai, L. Z., additional, Zhong, W. L., additional, Shi, Z. B., additional, Ding, X. T., additional, Duan, X. R., additional, and Liu, Y., additional

Published
2012
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5. Turbulence and zonal flows in edge plasmas of the HL-2A tokamak

Author

Zhao, K J, primary, Dong, J Q, additional, Yan, L W, additional, Hong, W Y, additional, Fujisawa, A, additional, Yu, C X, additional, Li, Q, additional, Qian, J, additional, Cheng, J, additional, Lan, T, additional, Liu, A D, additional, Zhao, H L, additional, Kong, D F, additional, Huang, Y, additional, Liu, Yi, additional, Song, X M, additional, Yang, Q W, additional, Ding, X T, additional, Duan, X R, additional, and Liu, Yong, additional

Published
2010
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10. Characteristics of geodesic acoustic mode zonal flow and ambient turbulence at the edge of the HL-2A tokamak plasmas

Author

Zhao, K. J., primary, Dong, J. Q., additional, Yan, L. W., additional, Hong, W. Y., additional, Lan, T., additional, Liu, A. D., additional, Qian, J., additional, Cheng, J., additional, Yu, D. L., additional, Huang, Y., additional, He, H. D., additional, Liu, Yi., additional, Yang, Q. W., additional, Duan, X. R., additional, Song, X. M., additional, Ding, X. T., additional, and Liu, Y., additional

Published
2007
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11. New diagnostic systems on HL-2A

Author

Ding, X. T., primary, Zhou, Y., additional, Deng, Z. C., additional, Xiao, W. W., additional, Liu, Z. T., additional, Shi, Z. B., additional, Yan, L. W., additional, Hong, W. Y., additional, and Yang, Q. W., additional

Published
2006
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13. Recent Experimental Results in the HL-2A Tokamak.

Author

Li, W., Yang, Q. W., Ding, X. T., Yan, L. W., Shi, Z. B., Dong, Y. B., Yao, L. H., Hong, W. Y., Xuan, W. M., Liu, D. Q., Chen, L. Y., Song, X. M., Zhang, J. H., Cao, Z., Cui, Z. Y., Pan, Y. D., Duan, X. R., Yi Liu, Feng, B. B., and Zhou, Y.

Subjects
TOKAMAKS, FUSION reactors, NUCLEAR reactors, ELECTRON temperature, ELECTRON distribution, FEEDBACK control systems
Abstract

As the first divertor tokamak in China, HL-2A device has been successfully operated and stably sustained in the single-null divertor configuration under good feedback control of plasma current and position. Up to now, the following operation parameters have been achieved: Ip = 400 kA, Bt = 2.6 T and discharge duration Td = 2980ms. An excellent repeatability of discharge has been achieved and about 90% Greenwald density limit has been reached. The HL-2A SN divertor configuration can be simulated by the SWEQU code and identified by CCD imaging system and CF code. The experimental results proved that the divertor configuration and siliconization could strongly decrease the plasma radiation and impurity emission and reduce the recycling effectively. Density limit disruption has been analyzed and some interesting phenomena, such as asymmetric cold pulse perturbation and snake-like perturbation, have been observed during Molecular Beam Injection. © 2006 American Institute of Physics [ABSTRACT FROM AUTHOR]

Published
2006
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17. Frequency-Resolved Nonlinear T\irbulent Energy Transfer into Zonal Flows in Strongly Heated L-Mode Plasmas in the HL-2ATokamak.

Author

Xu, M., Tynan, G. R., Diamond, P. H., Manz, R., Holland, C., Fedorczak, N., Thakur, S. Chakraborty, Yu, J. H., Zhao, K. J., Dong, J. Q., Cheng, J., Hong, W. Y., Yan, L. W., Yang, Q. W., Song, X. M., Huang, Y., Cai, L. Z., Zhong, W. L., Shi, Z. B., and Ding, X. T.

Subjects
*ENERGY transfer, *PLASMA gases, *NONLINEAR theories, *TURBULENCE, *GEODESICS, *FLUCTUATIONS (Physics), *REYNOLDS stress
Abstract

The absolute rate of nonlinear energy transfer among broadband turbulence, low-frequency zonal flows (ZFs) and geodesic acoustic modes (GAMs) was measured for the first time in fusion-grade plasmas using two independent methods across a range of heating powers. The results show that turbulent kinetic energy from intermediate frequencies (20-80 kHz) was transferred into ZFs and GAMs, as well as into fluctuations at higher frequencies (> 80 kHz). As the heating power was increased, the energy transfer from turbulence into GAMs and the GAM amplitudes increased, peaked and then decreased, while the energy transfer into the ZFs and the ZFs themselves increased monotonically with heating power. Thus there exists a competition between ZFs and GAMs for the transfer of turbulent energy, and the transfer into ZFs becomes dominant as the heating power is increased. The poloidal-radial Reynolds stress and the mean radial electric field profiles were also measured at different heating powers and found to be consistent with the energy transfer measurement. The results suggest that ZFs play an important role in the low-to-high (JL-H) plasma confinement transition [ABSTRACT FROM AUTHOR]

Published
2012
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