Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Xiawei CHEN"'
Publikováno v:
Guangxi Zhiwu, Vol 43, Iss 6, Pp 1163-1172 (2023)
In order to comprehensively analyze the essential oil components, antioxidant and antibacterial activities of the whole plant of Citrus aurantium var. amara, the essential oils from leaves, flowers and young fruits were extracted respectively by stea
Externí odkaz:
https://doaj.org/article/639e3d3654364a66a0baae579573721e
Publikováno v:
AIMS Mathematics, Vol 8, Iss 1, Pp 501-528 (2023)
In this paper, we define the Lorentzian approximations of a 3-dimensional Lorentzian α-Sasakian manifold. Moreover, we define the notions of the intrinsic curvature for regular curves, the intrinsic geodesic curvature of regular curves on Lorentzian
Externí odkaz:
https://doaj.org/article/826b96d746d949ecacd7993e467429e3
Publikováno v:
ISPRS International Journal of Geo-Information, Vol 12, Iss 12, p 499 (2023)
With the rapid pace of urbanization, enhancing the quality of life has become an urgent demand for the general public in both developed and developing countries. This study addresses the pressing need to understand the spatial distribution and underl
Externí odkaz:
https://doaj.org/article/ddc889805285460da78fd00dade5f0d7
Publikováno v:
Land, Vol 12, Iss 11, p 1998 (2023)
Quantitative evaluation of the environmental amenities (EAs) in urban recreation and leisure regions (URLRs) can provide stronger support for the government to enhance the quality of urban leisure space and improve the well-being of urban residents.
Externí odkaz:
https://doaj.org/article/c342fbc01213468c982c48e0e5a240c6
Autor:
Xiawei Chen, Haiming Liu
Publikováno v:
Symmetry, Vol 15, Iss 5, p 1077 (2023)
In this paper, we focus on the research and analysis of the geometric properties and symmetry of slant curves and contact magnetic curves in Lorentzian α-Sasakian 3-manifolds. To do this, we define the notion of Lorentzian cross product. From the pe
Externí odkaz:
https://doaj.org/article/68920021325149e89c07a05ef71174ea
Epidemiological and molecular survey of a foodborne disease outbreak caused by Enterococcus faecalis
Autor:
Xiawei CHEN, Chunsheng CAI, Binhong HE, Shunshan CAO, Yan GUO, Yuekang ZHENG, Jinjie OU, Boyuan WANG
Publikováno v:
Zhongguo shipin weisheng zazhi, Vol 32, Iss 01, Pp 99-102 (2020)
Objective To investigate a foodborne disease outbreak in a small restaurant, analyze its causes and risk factors, and propose the measures for prevention and control. Methods Using field epidemiology survey to describe the features and analyze the ri
Externí odkaz:
https://doaj.org/article/93e809982c32464d8e24f1d8cc522c95
Autor:
Haiming Liu, Xiawei Chen
Publikováno v:
Journal of Mathematics, Vol 2022 (2022)
In this paper, we consider the Lorentzian approximations of rigid motions of the Minkowski plane EL21,1. By using the method of Lorentzian approximations, we define the notions of the intrinsic curvature for regular curves, the intrinsic geodesic cur
Externí odkaz:
https://doaj.org/article/39723a808099422799c2333d276a4f99
Publikováno v:
AIMS Mathematics. 8:501-528
In this paper, we define the Lorentzian approximations of a $ 3 $-dimensional Lorentzian $ \alpha $-Sasakian manifold. Moreover, we define the notions of the intrinsic curvature for regular curves, the intrinsic geodesic curvature of regular curves o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cf049fad801c05c98411f13931a8e465
https://doi.org/10.3934/math.2023024
https://doi.org/10.3934/math.2023024
Autor:
Haiming Liu, Xiawei Chen
Publikováno v:
Journal of Mathematics. 2022:1-12
In this paper, we consider the Lorentzian approximations of rigid motions of the Minkowski plane E L 2 1,1 . By using the method of Lorentzian approximations, we define the notions of the intrinsic curvature for regular curves, the intrinsic geodesic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5eda8a5636dfa6358145dd4b34189b57
https://doi.org/10.1155/2022/5402011
https://doi.org/10.1155/2022/5402011
Publikováno v:
International Journal of Geometric Methods in Modern Physics.
In this paper, we define the notion of Bott connection in the Heisenberg group [Formula: see text] and derive the expression of the Bott connection by using the Levi-Civita connection. Moreover, we derive the expressions of killing vector fields by u
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::950cd2350b7b696fa7ba32234694e8d7
https://doi.org/10.1142/s0219887823501852
https://doi.org/10.1142/s0219887823501852