Results 1 to 10 of about 4,137,589 (389)

Intercept Guidance of Maneuvering Targets with Deep Reinforcement Learning

International Journal of Aerospace Engineering, 2023
In this paper, a novel guidance law based on a reinforcement learning (RL) algorithm is presented to deal with the maneuvering target interception problem using a deep deterministic policy gradient descent neural network.
Zhe Hu, Liang Xiao, Jun Guan, Wenjun Yi, Hongqiao Yin   +4 more
doaj   +1 more source

Nonlinear isolation performance of 6 × 19 wire rope of different lengths under compression

Advances in Mechanical Engineering, 2021
Stainless steel wire rope isolator is widely used in engineering. To optimize design of the isolator, loading, and unloading characteristics of the 6 × 19 6 mm wire rope under compression are investigated. Ropes of different lengths are tested to get the
Genlin Mo, Jing Liu, Yongxi Jin, Wenmin Yan   +3 more
doaj   +1 more source

Numerical investigation on the interactions between rotating detonation wave complex and planar turbine cascade

Energy Science & Engineering, 2023
Due to pressure gain characteristics, the rotating detonation combustor (RDC) can be integrated into gas turbines by further improving the system's performance. The matching of unsteady flows in the RDC and turbine is a key challenge.
Qun Li, Yuwen Wu, Yiqing Xia, Xiang Li, Chunsheng Weng   +4 more
doaj   +1 more source

Ultra-Broadband Bending Beam and Bottle Beam Based on Acoustic Metamaterials

Applied Sciences, 2022
We report the realization of an ultra-broadband bending beam based on acoustic metamaterials by the theoretical prediction and the numerical validation. The proposed structure is composed of a series of straight tubes with spatially modulated depths.
Xudong Fan, Xiaolong Huang, Yang Kang, Can Li, Ning Li, Chunsheng Weng   +5 more
doaj   +1 more source

Effects of total pressures and equivalence ratios on kerosene/air rotating detonation engines using a paralleling CE/SE method

Defence Technology, 2021
In this paper, the kerosene/air rotating detonation engines(RDE) are numerically investigated, and the emphasis is laid on the effects of total pressures and equivalence ratios on the operation characteristics of RDE including the initiation ...
Fang Wang, Chun-sheng Weng, Yu-wen Wu, Qiao-dong Bai, Quan Zheng, Han Xu   +5 more
doaj   +1 more source

Faster and Lightweight: An Improved YOLOv5 Object Detector for Remote Sensing Images

Remote Sensing, 2023
In recent years, the realm of deep learning has witnessed significant advancements, particularly in object detection algorithms. However, the unique challenges posed by remote sensing images, such as complex backgrounds, diverse target sizes, dense ...
Jiarui Zhang, Zhihua Chen, Guoxu Yan, Yi Wang, Bo Hu   +4 more
doaj   +1 more source

The Zwicky Transient Facility: System Overview, Performance, and First Results [PDF]

Publications of the Astronomical Society of the Pacific, 2018
The Zwicky Transient Facility (ZTF) is a new optical time-domain survey that uses the Palomar 48 inch Schmidt telescope. A custom-built wide-field camera provides a 47 deg2 field of view and 8 s readout time, yielding more than an order of magnitude ...
E. Bellm, S. Kulkarni, M. Graham, R. Dekany, Roger M. Smith, R. Riddle, F. Masci, G. Helou, T. Prince, S. Adams, C. Barbarino, T. Barlow, J. Bauer, R. Beck, J. Belicki, R. Biswas, N. Blagorodnova, D. Bodewits, B. Bolin, V. Brinnel, T. Brooke, B. Bue, M. Bulla, R. Burruss, S. Cenko, Chan-Kao Chang, A. Connolly, M. Coughlin, J. Cromer, V. Cunningham, K. De, A. Delacroix, V. Desai, D. Duev, G. Eadie, T. Farnham, M. Feeney, U. Feindt, D. Flynn, A. Franckowiak, S. Frederick, C. Fremling, A. Gal-yam, S. Gezari, M. Giomi, D. Goldstein, V. Golkhou, A. Goobar, S. Groom, Eugean Hacopians, D. Hale, J. Henning, A. Ho, D. Hover, J. Howell, T. Hung, D. Huppenkothen, D. Imel, W. Ip, vZeljko Ivezi'c, E. Jackson, L. Jones, M. Jurić, M. Kasliwal, S. Kaspi, S. Kaye, M. Kelley, M. Kowalski, E. Kramer, T. Kupfer, W. Landry, R. Laher, Chien-De Lee, Hsing-Wen Lin, Zhong-Yi Lin, R. Lunnan, A. Mahabal, P. Mao, Adam A. Miller, S. Monkewitz, Patrick Murphy, C. Ngeow, J. Nordin, P. Nugent, E. Ofek, M. Patterson, B. Penprase, Michael E. Porter, L. Rauch, U. Rebbapragada, D. Reiley, M. Rigault, H. Rodriguez, J. Roestel, B. Rusholme, J. Santen, S. Schulze, D. Shupe, L. Singer, M. Soumagnac, R. Stein, J. Surace, J. Sollerman, P. Szkody, F. Taddia, S. Terek, A. V. Sistine, S. Velzen, W. Vestrand, R. Walters, C. Ward, Q. Ye, P. Yu, Lin Yan, J. Zolkower   +114 more
semanticscholar   +1 more source

Simultaneous multi-parameter analysis of detonation field based on line fitting of wavelength modulated second harmonic signals

AIP Advances, 2023
In the wavelength modulation method of laser absorption spectroscopy, the second harmonic signal contains numerous information about the flow field parameters.
Yinglian Yang, Ning Li, Xiaolong Huang, Yang Kang, Can Li, Xudong Fan, Chunsheng Weng   +6 more
doaj   +1 more source

LssDet: A Lightweight Deep Learning Detector for SAR Ship Detection in High-Resolution SAR Images

Remote Sensing, 2022
Synthetic aperture radar (SAR) ship detection has been the focus of many previous studies. Traditional SAR ship detectors face challenges in complex environments due to the limitations of manual feature extraction.
Guoxu Yan, Zhihua Chen, Yi Wang, Yangwei Cai, Shikang Shuai   +4 more
doaj   +1 more source

The Zwicky Transient Facility: Science Objectives [PDF]

Publications of the Astronomical Society of the Pacific, 2019
The Zwicky Transient Facility (ZTF), a public–private enterprise, is a new time-domain survey employing a dedicated camera on the Palomar 48-inch Schmidt telescope with a 47 deg2 field of view and an 8 second readout time.
M. Graham, S. Kulkarni, E. Bellm, S. Adams, C. Barbarino, N. Blagorodnova, D. Bodewits, B. Bolin, P. Brady, S. Cenko, Chan-Kao Chang, M. Coughlin, K. De, G. Eadie, T. Farnham, U. Feindt, A. Franckowiak, C. Fremling, A. Gal-yam, S. Gezari, Shaon Ghosh, D. Goldstein, V. Golkhou, A. Goobar, A. Ho, D. Huppenkothen, Ž. Ivezić, R. L. Jones, M. Jurić, D. Kaplan, M. Kasliwal, M. Kelley, T. Kupfer, Chien-De Lee, Hsing-Wen Lin, R. Lunnan, A. Mahabal, Adam A. Miller, C. Ngeow, P. Nugent, E. Ofek, T. Prince, L. Rauch, J. Roestel, S. Schulze, L. Singer, J. Sollerman, F. Taddia, Lin Yan, Q. Ye, P. Yu, I. Andreoni, T. Barlow, J. Bauer, R. Beck, J. Belicki, R. Biswas, V. Brinnel, T. Brooke, B. Bue, M. Bulla, K. Burdge, R. Burruss, A. Connolly, J. Cromer, V. Cunningham, R. Dekany, Alexander Delacroix, V. Desai, D. Duev, Eugean Hacopians, D. Hale, G. Helou, J. Henning, D. Hover, L. Hillenbrand, J. Howell, T. Hung, D. Imel, W. Ip, E. Jackson, S. Kaspi, S. Kaye, M. Kowalski, E. Kramer, Michael Kuhn, W. Landry, R. Laher, P. Mao, F. Masci, S. Monkewitz, Patrick Murphy, J. Nordin, M. Patterson, B. Penprase, Michael E. Porter, U. Rebbapragada, D. Reiley, R. Riddle, M. Rigault, H. Rodriguez, B. Rusholme, J. Santen, D. Shupe, Roger M. Smith, M. Soumagnac, R. Stein, J. Surace, P. Szkody, S. Terek, A. V. Sistine, S. Velzen, W. Vestrand, R. Walters, C. Ward, Chaoran Zhang, J. Zolkower   +116 more
semanticscholar   +1 more source