Zobrazeno 1 - 10
of 687
pro vyhledávání: '"Deng Qin"'
Publikováno v:
Gongye shui chuli, Vol 44, Iss 8, Pp 140-148 (2024)
Zeolite,fly ash and coal gasification slag were used as raw materials to prepare a new type of phosphorus removal filler with low cost and high efficiency through artificial improvement, and its adsorption performance and regeneration ability were ex
Externí odkaz:
https://doaj.org/article/d16ee621a741480a91baebedf1ebb049
Publikováno v:
Engineering Applications of Computational Fluid Mechanics, Vol 18, Iss 1 (2024)
Predicting noise from the actual train model by numerical simulation and wind tunnel testing requires appropriate corrections based on reduced model scale and airflow velocity. This paper utilises the Improved Delayed Detached Eddy Simulation method
Externí odkaz:
https://doaj.org/article/b17c17567b6a4260a56e921a8e0c0e17
Publikováno v:
Engineering Applications of Computational Fluid Mechanics, Vol 17, Iss 1 (2023)
It is noteworthy to explore potential measures for further reducing the aerodynamic drag and noise of high-speed pantographs. This paper proposes a method of introducing spanwise waviness into the upper and lower arms. The improved delayed detached e
Externí odkaz:
https://doaj.org/article/8e772a62512c45dcadab449a326b596b
Publikováno v:
Chinese Journal of Mechanical Engineering, Vol 35, Iss 1, Pp 1-14 (2022)
Abstract In this paper, the unsteady flow around a high-speed train is numerically simulated by detached eddy simulation method (DES), and the far-field noise is predicted using the Ffowcs Williams-Hawkings (FW-H) acoustic model. The reliability of t
Externí odkaz:
https://doaj.org/article/1f5eac71c1234187b813c63f127c146d
Publikováno v:
Chinese Journal of Mechanical Engineering, Vol 32, Iss 1, Pp 1-12 (2019)
Abstract The numerical simulation based on Reynolds time-averaged equation is one of the approved methods to evaluate the aerodynamic performance of trains in crosswind. However, there are several turbulence models, trains may present different aerod
Externí odkaz:
https://doaj.org/article/baac841602f546fe99ee0b1e1c3c4463
We extend the Margulis Lemma for manifolds with lower Ricci curvature bounds to the $\text{RCD}(K,N)$ setting. As one of our main tools, we obtain improved regularity estimates for Regular Langrangian flows on these spaces.
Comment: 51 pages
Comment: 51 pages
Externí odkaz:
http://arxiv.org/abs/2308.15215
Autor:
Deng, Qin, Kapovitch, Vitali
We obtain sharp volume bounds on the boundaries of Alexandrov spaces with given lower curvature bound, dimension, and radius. We also completely classify the rigidity case and analyze almost rigidity. Our results are new even for smooth manifolds wit
Externí odkaz:
http://arxiv.org/abs/2308.14668
Autor:
Deng, Qin, Zhao, Xinrui
In this note we establish the weak unique continuation theorem for caloric functions on compact $RCD(K,2)$ spaces and show that there exists an $RCD(K,4)$ space on which there exist non-trivial eigenfunctions of the Laplacian and non-stationary solut
Externí odkaz:
http://arxiv.org/abs/2212.14237
Autor:
Deng, Qin, Zhao, Xinrui
Unique continuation of harmonic functions on $RCD$ space is a long-standing open problem, with little known even in the setting of Alexandrov spaces. In this paper, we establish the weak unique continuation theorem for harmonic functions on $RCD(K,2)
Externí odkaz:
http://arxiv.org/abs/2204.13889
Autor:
Yu, Shuang, Zhang, Wei, Zhang, Liping, Wu, Dan, Fu, Genying, Yang, Mengxian, Wu, Kun, Wu, Zhuo, Deng, Qin, Zhu, Jie, Fu, Huizhen, Lu, Xu, Wang, Zhiwei, Cheng, Shanhan
Publikováno v:
In International Journal of Biological Macromolecules November 2024 280 Part 1