Zobrazeno 1 - 10
of 171
pro vyhledávání: '"Xiaochuan ZHANG"'
Publikováno v:
Frontiers in Communications and Networks, Vol 5 (2024)
In this paper, a fast temporal multiple sparse Bayesian learning (FTMSBL)-based channel estimation method for underwater acoustic (UWA) orthogonal frequency division multiplexing (OFDM) systems is proposed, which is optimized using the fast marginali
Externí odkaz:
https://doaj.org/article/3707a50cb023487cb7edc7cee10fc535
Publikováno v:
水下无人系统学报, Vol 32, Iss 1, Pp 18-24 (2024)
While performing underwater observation and detection, the underwater acoustic glider needs to finish the current profile glide to float to the surface for information exchange and thus fails to realize real-time data information return. In this pape
Externí odkaz:
https://doaj.org/article/7b1e2554682c4477a45f24e82d7923f6
Publikováno v:
International Journal of Computational Intelligence Systems, Vol 16, Iss 1, Pp 1-11 (2023)
Abstract Loop closure detection (LCD) plays an important role in visual simultaneous location and mapping (SLAM), as it can effectively reduce the cumulative errors of the SLAM system after a long period of movement. Convolutional neural networks (CN
Externí odkaz:
https://doaj.org/article/a0cea12e6d2a4cf980c9a56c53b3edc8
Publikováno v:
IEEE Access, Vol 11, Pp 7829-7836 (2023)
The channel estimation algorithm based on sparse Bayesian learning proposed in recent years shows better performance than the traditional channel estimation algorithm by effectively reducing the convergence error in the channel estimation process. Ho
Externí odkaz:
https://doaj.org/article/a87c607faa6f4cb68fd06ba16842494a
Publikováno v:
Applied Sciences, Vol 14, Iss 7, p 2944 (2024)
Vortex drainage gas recovery has been used to carry liquid from gas wells. However, the traditional vortex tools in gas wells cannot produce long effective distance spiral flow at a low gas flow rate, and their operating mechanism has not been thorou
Externí odkaz:
https://doaj.org/article/2baabe3c177e4fd59aa082a0bc5ccb9a
Publikováno v:
AIP Advances, Vol 13, Iss 4, Pp 045308-045308-10 (2023)
To address the problem that the traditional generalized cross correlation (GCC) method in ultra-short baseline (USBL) positioning systems has a poor delay estimation accuracy in a low signal-to-noise ratio environment or complex noise background, a g
Externí odkaz:
https://doaj.org/article/852b0510e087400490edff470d8cd918
Publikováno v:
PLoS ONE, Vol 18, Iss 12, p e0295356 (2023)
The high pressure in some gas wells, such as those in the Xushen gas field in Daqing, China, makes them susceptible to freezing and hydrate blockages. Downhole throttling technology is widely used to reduce costs during well construction, however, du
Externí odkaz:
https://doaj.org/article/bad4587f33f04324918ad5ade4051805
Publikováno v:
Case Studies in Construction Materials, Vol 17, Iss , Pp e01511- (2022)
Cemented sand and gravel is widely used in water conservancy project construction due to its advantages of low material consumption, strong adaptability and environmental protection. Due to the single design of the dam section, its application scope
Externí odkaz:
https://doaj.org/article/92074842105e480690c92926185a1a1a
Publikováno v:
Applied Sciences, Vol 13, Iss 18, p 10385 (2023)
The accuracy and speed of facial keypoint detection are crucial factors for effectively extracting fatigue features, such as eye blinking and yawning. This paper focuses on the improvement and optimization of facial keypoint detection algorithms, pre
Externí odkaz:
https://doaj.org/article/41283886010f49819ad7e2f9367f35e2
Publikováno v:
Applied Sciences, Vol 13, Iss 15, p 8943 (2023)
Dialogue state tracking is an essential component in multi-domain dialogue systems that aims to accurately determine the current dialogue state based on the dialogue history. Existing research has addressed the issue of multiple mappings in dialogues
Externí odkaz:
https://doaj.org/article/30f6923dba6d4de9acf978f97601a7e5