Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Xueshan F"'
Publikováno v:
AIMS Mathematics, Vol 6, Iss 9, Pp 9476-9490 (2021)
In this work, we study the canal surfaces foliated by pseudo hyperbolic spheres $ \mathbb{H}_{0}^{2} $ along a Frenet curve in terms of their Gauss maps in Minkowski 3-space. Such kind of surfaces with pointwise 1-type Gauss maps are classified compl
Externí odkaz:
https://doaj.org/article/0b6b6eea7a3b4296a5da4d1d29c9668d
Publikováno v:
Mathematics, Vol 9, Iss 12, p 1451 (2021)
In this work, the rectifying isotropic curves are investigated in three-dimensional complex space C3. The conclusion that an isotropic curve is a rectifying curve if and only if its pseudo curvature is a linear function of its pseudo arc-length is ac
Externí odkaz:
https://doaj.org/article/9fe43c844d684a9baa3e3a0ca1f1c6ef
Publikováno v:
Mathematics, Vol 8, Iss 11, p 1921 (2020)
In this paper, the representation formula of maximal surfaces in a 3-dimensional lightlike cone Q3 is obtained by making use of the differential equation theory and complex function theory. Some particular maximal surfaces under a special induced met
Externí odkaz:
https://doaj.org/article/720cae1feb63497984bd39cd6ab5cce1
Publikováno v:
Mathematics, Vol 8, Iss 10, p 1728 (2020)
In the present work, the notion of generalized Cheng–Yau 1-type Gauss map is proposed, which is similar to the idea of generalized 1-type Gauss maps. Based on this concept, the surfaces of revolution and the canal surfaces in the Euclidean three-sp
Externí odkaz:
https://doaj.org/article/12ef6bd67f994593bbad45365acb8085
Publikováno v:
Mathematics, Vol 8, Iss 9, p 1453 (2020)
In this work, we study the canal surfaces foliated by pseudo spheres S12 along a Frenet curve in terms of their Gauss maps in Minkowski 3-space. Such kind of surfaces with pointwise 1-type Gauss maps are classified completely. For example, the canal
Externí odkaz:
https://doaj.org/article/f9a34af9756b4c02a0fcb8bb4e8d7506
Publikováno v:
Mathematics, Vol 8, Iss 7, p 1111 (2020)
In this work, a pair of dual associate null scrolls are defined from the Cartan Frenet frame of a null curve in Minkowski 3-space. The fundamental geometric properties of the dual associate null scrolls are investigated and they are related in terms
Externí odkaz:
https://doaj.org/article/557be26e163c4709b3bfb6894a3fd84f
Publikováno v:
Mathematics, Vol 8, Iss 3, p 395 (2020)
In this work, the Darboux associated curves of a null curve on pseudo-Riemannian space forms, i.e., de-Sitter space, hyperbolic space and a light-like cone in Minkowski 3-space are defined. The relationships of such partner curves are revealed includ
Externí odkaz:
https://doaj.org/article/111eade0e96247e189851f91cd84c3ea
Publikováno v:
Mathematics, Vol 7, Iss 10, p 931 (2019)
In this work, a family of ruled surfaces named generalized null scrolls in Minkowski 3-space are investigated via the defined structure functions. The relations between the base curve and the ruling flow of the generalized null scroll are revealed. T
Externí odkaz:
https://doaj.org/article/4fd6d7ee7ed043fc8b69a478187a6bbf
Publikováno v:
Mathematics, Vol 7, Iss 8, p 703 (2019)
Canal surfaces are defined and divided into nine types in Minkowski 3-space E 1 3 , which are obtained as the envelope of a family of pseudospheres S 1 2 , pseudohyperbolic spheres H 0 2 , or lightlike cones Q 2 , whose centers lie on a space curve (
Externí odkaz:
https://doaj.org/article/98257e483a5145499820526e8b0fcdf1
Publikováno v:
Sensors, Vol 17, Iss 3, p 538 (2017)
Non-destructive and timely determination of leaf nitrogen (N) concentration is urgently needed for N management in pear orchards. A two-year field experiment was conducted in a commercial pear orchard with five N application rates: 0 (N0), 165 (N1),
Externí odkaz:
https://doaj.org/article/148daa2e843b493380675ae819c7282b