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Geometrical Modeling of Crystal Structures with Use of Space of Elliptic Riemannian Geometry
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作者 Stanislav Rudnev Boris Semukhin Andrey Klishin 《Materials Sciences and Applications》 2011年第6期526-536,共11页
The space of internal geometry of a model of a real crystal is supposed to be finite, closed, and with a constant Gaussian curvature equal to unity, permitting the realization of lattice systems in accordance with Fed... The space of internal geometry of a model of a real crystal is supposed to be finite, closed, and with a constant Gaussian curvature equal to unity, permitting the realization of lattice systems in accordance with Fedorov groups of transformations. For visualizing computations, the interpretation of geometrical objects on a Clifford surface (SK) in Riemannian geometry with the help of a 2D torus in a Euclidean space is used. The F-algorithm ensures a computation of 2D sections of models of point systems arranged perpendicularly to the symmetry axes l3, l4, and l6. The results of modeling can be used for calculations of geometrical sizes of crystal structures, nanostructures, parameters of the cluster organization of oxides, as well as for the development of practical applications connected with improving the structural characteristics of crystalline materials. 展开更多
关键词 f-Algorithm Crystal LATTICE Systems Microstructure RIEMANNIAN Geometry space of Interpretation
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白云鄂博主矿岩、矿石中F与S元素分布特征研究
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作者 王云 苑星宇 +3 位作者 田琦 张丽 严钊 孟文祥 《包钢科技》 2025年第3期9-13,共5页
文章基于近年白云鄂博主矿生产的穿孔数据,按铁品位将岩、矿石划分为3个大类、5个亚类,总结了各个类型岩、矿石中F与S含量分布规律及其空间耦合特征。研究结果表明,白云鄂博主矿F元素的主要赋存矿物为萤石和氟碳铈矿,S元素的主要赋存矿... 文章基于近年白云鄂博主矿生产的穿孔数据,按铁品位将岩、矿石划分为3个大类、5个亚类,总结了各个类型岩、矿石中F与S含量分布规律及其空间耦合特征。研究结果表明,白云鄂博主矿F元素的主要赋存矿物为萤石和氟碳铈矿,S元素的主要赋存矿物为黄铁矿、磁黄铁矿和方铅矿。在F与S元素含量分布方面,随着矿石铁品位升高,F与S含量总体呈先上升后下降的变化规律;在空间分布方面,F与S元素与铁矿石在空间上关系最密切,随着F与S含量升高,F与S元素在空间分布范围逐渐变小,叠合区也逐渐减小且分离,呈异体相间分带的分布特征。 展开更多
关键词 白云鄂博主矿 岩、矿石 f S 空间分布
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A MAXIMAL FUNCTION CHARACTERIZATION 0F HARDY SPACES ON SPACES OF HOMOGENEOUS TYPE 被引量:6
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作者 Li Wenming Zhongshan University, China 《Analysis in Theory and Applications》 1998年第2期12-27,共16页
A new maximal function is introduced in the dual spaces of test function spaces on spaces of homogeneous type. Using this maximal function, we get new characterization of atomic H^p spaces.
关键词 A MAXIMAL fUNCTION CHARACTERIZATION 0f HARDY spaceS ON spaceS Of HOMOGENEOUS TYPE APPI 尸气
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THE EQUIVALENT CHARACTERIZATION OF F(p,q,s)SPACE ON BOUNDED SYMMETRIC DOMAINS OF Cn 被引量:4
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作者 黎深莲 张学军 徐思 《Acta Mathematica Scientia》 SCIE CSCD 2017年第6期1791-1802,共12页
LetΩ be a bounded symmetric domain in Cn. The purpose of this article is to define and characterize the general function space F(p, q, s) on Ω. Characterizing functions in the F(p, q, s) space is a work of consi... LetΩ be a bounded symmetric domain in Cn. The purpose of this article is to define and characterize the general function space F(p, q, s) on Ω. Characterizing functions in the F(p, q, s) space is a work of considerable interest nowadays. In this article, the authors give several equivalent descriptions of the functions in the F(p, q, s) space on Ω in terms of fractional differential operators. At the same time, the authors give the relationship between F(p, q, s) space and Bloch type space on Ω too. 展开更多
关键词 f(p q s) space equivalent description bounded symmetric domain
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ON THE BOUNDEDNESS OF SPHERES IN F-SPACES 被引量:1
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作者 定光桂 《Acta Mathematica Scientia》 SCIE CSCD 2002年第4期500-506,共7页
In this paper, some results concerning the relationship between the bounded-ness of some spheres and the local boundedness of the .F*-space are presented. Moreover, some results about the compactness are also given.
关键词 f*-space SPHERE local boundedness COMPACTNESS
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CARLESON MEASURES,RIEMANN-STIELTJES OPERATORS AND MULTIPLIERS ON F(p,q,s)SPACES IN THE UNIT BALL OF C^n 被引量:3
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作者 彭茹 吴悠 邓方文 《Acta Mathematica Scientia》 SCIE CSCD 2016年第3期635-654,共20页
This paper is devoted to characterizing the Riemann-Stieltjes operators and pointwise multipliers on F(p, q, s) spaces in the unit ball of C^n which contain many classical function spaces, such as the Bloch space, B... This paper is devoted to characterizing the Riemann-Stieltjes operators and pointwise multipliers on F(p, q, s) spaces in the unit ball of C^n which contain many classical function spaces, such as the Bloch space, BMOA and Q8 spaces. The boundedness and compactness of these operators on F(p, q, s) spaces are characterized by means of an embedding theorem, i.e., F(p,q, s) spaces boundedly embedded into the tent-type spaces Tp,s^∞(μ) 展开更多
关键词 Carleson measures f(p q s) spaces tent-type spaces Riemann-Stieltjes operators MULTIPLIERS
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Composition-integral Type Operators from F(p, q, s) Spaces to Bloch-type Spaces 被引量:2
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作者 LV Xiao-fen YING Shao-hong 《Chinese Quarterly Journal of Mathematics》 CSCD 2012年第3期352-356,共5页
This paper deals with the boundedness and compactness of the compositionintegral type operators T g, from F (p, q, s) spaces to(little) Bloch-type spaces in the unit ball of C n , where Tg,φf(z) =∫01fφ(tz)Rg(tz)(dt... This paper deals with the boundedness and compactness of the compositionintegral type operators T g, from F (p, q, s) spaces to(little) Bloch-type spaces in the unit ball of C n , where Tg,φf(z) =∫01fφ(tz)Rg(tz)(dt)/t , z ∈ B, g ∈ H(B) and φ∈H(B, B). 展开更多
关键词 f (p q s) space Bloch-type space BOUNDEDNESS COMPACTNESS
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NEW SYSTEMS OF GENERALIZED QUASI-VARIATIONAL INCLUSIONS IN FC-SPACES AND APPLICATIONS 被引量:4
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作者 丁协平 《Acta Mathematica Scientia》 SCIE CSCD 2011年第3期1142-1154,共13页
In this paper, we study some new systems of generalized quasi-variational inclusion problems in FC-spaces without convexity structure.By applying an existence theorem of maximal elements of set-valued mappings due to ... In this paper, we study some new systems of generalized quasi-variational inclusion problems in FC-spaces without convexity structure.By applying an existence theorem of maximal elements of set-valued mappings due to the author, some new existence theorems of solutions for the systems of generalized quasi-variational inclusion problems are proved in noncompact FC-spaces. As applications, some existence results of solutions for the system of quasi-optimization problems and mathematical programs with the systems of generalized quasi-variational inclusion constraints are obtained in FC-spaces. 展开更多
关键词 maximal element system of generalized quasi-variational inclusion problems system of quasi-optimization problems mathematical programs with systems of generalized quasi-variational inclusion constraints f C-space
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AN INTEGRAL ESTIMATE AND THE EQUIVALENT NORMS ON F(p, q, s, k) SPACES IN THE UNIT BALL 被引量:8
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作者 张学军 黎深莲 +1 位作者 尚清丽 郭雨婷 《Acta Mathematica Scientia》 SCIE CSCD 2018年第6期1861-1880,共20页
In this article, the authors give a typical integral's bidirectional estimates for allcases. At the same time, several equivalent characterizations on the F(p, q, s, k) space in theunit ball of Cn are given.
关键词 f(p Q s k) space integral estimate equivalent norm unit ball
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Weighted composition operators from F(p,q,s) spaces to Bers-type spaces in the unit ball 被引量:2
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作者 LU Xiao-fen 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 2009年第4期462-472,共11页
This paper deals with the boundedness and compactness of the weighted composition operators from the F(p, q, s) spaces, including Hardy space, Bergman space, Qp space, BMOA space, Besov space and α-Bloch space, to ... This paper deals with the boundedness and compactness of the weighted composition operators from the F(p, q, s) spaces, including Hardy space, Bergman space, Qp space, BMOA space, Besov space and α-Bloch space, to Bers-type spaces Hv^∞( or little Bers-type spaces Hv,o∞ ), where v is normal. 展开更多
关键词 f(p Q s) space Bers-type space weighted composition operator unit ball
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Coupled Coincidence Points for F-Contractive Type Mappings in Partially Ordered Metric Spaces 被引量:1
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作者 SONG Jiping 《Wuhan University Journal of Natural Sciences》 CAS CSCD 2019年第6期493-504,共12页
In this article,some coupled coincidence point results for two mappings g:X→X and G:X×X→X satisfying F-contractive type conditions are obtained,and some coupled fixed point results are derived in partially orde... In this article,some coupled coincidence point results for two mappings g:X→X and G:X×X→X satisfying F-contractive type conditions are obtained,and some coupled fixed point results are derived in partially ordered metric spaces.A sufficient condition for uniqueness of coupled point of coincidence are established for F type contraction,and a coupled common fixed point theorem is obtained.Some examples are given to support our results. 展开更多
关键词 PARTIALLY ordered metric space COUPLED COINCIDENCE point f-contraction type mapping
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Closed Range Composition Operators on a General Family of Function Spaces
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作者 M.A.Bakhit 《Analysis in Theory and Applications》 CSCD 2016年第3期215-231,共17页
In this paper, necessary and sufficient conditions for a closed range composition operator CФ on the general family of holomorphic function spaces F(p,q,s) and more generally on α-Besov type spaces F(p,αp-2,s) ... In this paper, necessary and sufficient conditions for a closed range composition operator CФ on the general family of holomorphic function spaces F(p,q,s) and more generally on α-Besov type spaces F(p,αp-2,s) are given. We give a Carleson measure characterization on F (p, αp - 2, s) spaces, then we indicate how Carleson measures can be used to characterize boundedness and compactness of CФ on F(p,q,s) and F(p,αp- 2,s) spaces. 展开更多
关键词 Composition operators f(p q s) spaces closed range Carleson measure Bloch space Bergman type space
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ON F(p,q,s)SPACES 被引量:2
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作者 Ruhan ZHAO 《Acta Mathematica Scientia》 SCIE CSCD 2021年第6期1985-2020,共36页
The family of spaces F(p,q,s)was introduced by the author in 1996.Since then,there has been great development in the theory of these spaces,due to the fact that these spaces include many classical function spaces,and ... The family of spaces F(p,q,s)was introduced by the author in 1996.Since then,there has been great development in the theory of these spaces,due to the fact that these spaces include many classical function spaces,and have connections with many other areas of mathematics.In this survey we present some basic properties and recent results on F(p,q,s)spaces. 展开更多
关键词 f(p q s)spaces Qs spaces α-Bloch spaces BMOA weighted Dirichlet spaces weighted Bergman spaces Hardy space Riemann-Stieltjes operators point-wise multiplication operators
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The Gleason's problem on normal weight general function spaces in the unit ball of C^(n)
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作者 GUO Yu-ting ZHANG Xue-jun 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 2023年第4期604-613,共10页
In this paper,we first discuss the boundedness of certain integral operator T_(t) on the normal weight general function space F(p,μ,s)in the unit ball Bnof C^(n).As an application of this operator,we prove that the G... In this paper,we first discuss the boundedness of certain integral operator T_(t) on the normal weight general function space F(p,μ,s)in the unit ball Bnof C^(n).As an application of this operator,we prove that the Gleason’s problem is solvable on F(p,μ,s). 展开更多
关键词 Gleason's problem SOLVABILITY f(p μ s)space integral operator
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赋F-范数的Orlicz-Lorentz序列空间的单调性
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作者 薛阳阳 崔云安 《哈尔滨理工大学学报》 北大核心 2025年第4期143-148,共6页
在Orlicz-Lorentz空间引进了赋Mazur-Orlicz F-范数,并研究了相关性质,证明了赋F-范数的Orlicz-Lorentz空间是完备的F-空间,得到赋Mazur-Orlicz F-范数的Orlicz-Lorentz空间严格单调的充要条件,为研究赋F-范数的Orlicz-Lorentz空间的几... 在Orlicz-Lorentz空间引进了赋Mazur-Orlicz F-范数,并研究了相关性质,证明了赋F-范数的Orlicz-Lorentz空间是完备的F-空间,得到赋Mazur-Orlicz F-范数的Orlicz-Lorentz空间严格单调的充要条件,为研究赋F-范数的Orlicz-Lorentz空间的几何性质提供了一个新的思路。 展开更多
关键词 Mazur-Orlicz f-范数 Orlicz-Lorentz空间 严格单调 f-空间 单调递增
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GENERALIZED VECTOR VARIATIONAL-TYPE INEQUALITIES IN FC-SPACES
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作者 方敏 丁协平 《Applied Mathematics and Mechanics(English Edition)》 SCIE EI 2006年第11期1451-1459,共9页
A class of generalized vector variational-type inequality problems (GVVTIP) are studied in FC-spaces, which includes the most of vector equilibrium problems, vector variational inequality problems, generalized vecto... A class of generalized vector variational-type inequality problems (GVVTIP) are studied in FC-spaces, which includes the most of vector equilibrium problems, vector variational inequality problems, generalized vector equilibrium problems and general- ized vector variational inequality problem as special cases. By using F-KKM theorem, some new existence results for GVVTIP axe established in noncompact FC-space. As consequences, some recent known results in literature are obtained under much weaker assumption. 展开更多
关键词 generalized vector variational-type inequality f-KKM mapping f-Px-diagonally quasiconvex fC-space
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D^(*)-度量空间中F-压缩条件下的不动点
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作者 张丽娟 《山西师范大学学报(自然科学版)》 2025年第3期5-8,共4页
在完备的D^(*)-度量空间中,通过改进压缩条件,利用迭代法构造D^(*)-度量空间中的收敛序列,证明了D^(*)-度量空间中F-压缩条件下不动点的存在性和唯一性,所得结果推广了文献中的一些结论.
关键词 D^(*)-度量空间 f-压缩映射 不动点
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Near-Vector Spaces Constructed over Zp, for p a Prime
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作者 Kelone Tefoetsile Jeromy Kalunga +3 位作者 Mathews Zimba James Muchinga Saviour Chibeti Henry M. Phiri 《Advances in Pure Mathematics》 2023年第1期11-33,共23页
The purpose of this paper is to construct near-vector spaces using a result by Van der Walt, with Z<sub>p</sub> for p a prime, as the underlying near-field. There are two notions of near-vector spaces, we ... The purpose of this paper is to construct near-vector spaces using a result by Van der Walt, with Z<sub>p</sub> for p a prime, as the underlying near-field. There are two notions of near-vector spaces, we focus on those studied by André [1]. These near-vector spaces have recently proven to be very useful in finite linear games. We will discuss the construction and properties, give examples of these near-vector spaces and give its application in finite linear games. 展开更多
关键词 Vector spaces Near Vector spaces REGULARITY Compatibility fields Near-fields f-Group and Quasi-Kernel
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Mini-SiC_(f)/SiC复合材料长时间高温下的力学性能演变
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作者 陈斌 任科 王一光 《无机材料学报》 北大核心 2025年第9期971-980,共10页
连续碳化硅纤维增强碳化硅(SiC_(f)/SiC)复合材料因其优异的力学性能和耐高温特性,已广泛应用于航空发动机热端部件。为了确保SiC_(f)/SiC复合材料部件在服役过程中的安全性,研究其在长时间高温下的力学性能演变具有重要意义。本研究采... 连续碳化硅纤维增强碳化硅(SiC_(f)/SiC)复合材料因其优异的力学性能和耐高温特性,已广泛应用于航空发动机热端部件。为了确保SiC_(f)/SiC复合材料部件在服役过程中的安全性,研究其在长时间高温下的力学性能演变具有重要意义。本研究采用Cansas-Ⅱ SiC纤维制备了具有BN界面的mini-SiC_(f)/SiC复合材料,在1100、1200、1350℃下分别进行5、10、50、100、200 h的热处理,以探究长时间高温热处理对mini-SiC_(f)/SiC复合材料力学性能的影响。研究结果表明:在1100℃下,热处理对mini-SiC_(f)/SiC复合材料的力学性能未产生显著影响,各阶段对力学性能的贡献占比几乎保持不变。在1200℃下,短时间热处理对于mini-SiC_(f)/SiC复合材料的作用不明显,其拉伸强度未显著变化;然而,长时间热处理会导致SiC纤维损伤,从而降低复合材料的拉伸强度。在1350℃下,热处理显著改善了BN界面性能,导致SiC纤维损伤严重,mini-SiC_(f)/SiC复合材料的力学性能显著降低,且随着热处理时间延长,纤维损伤程度加深,复合材料力学性能持续恶化。 展开更多
关键词 Cansas-ⅡSiC纤维 mini-SiC_(f)/SiC复合材料 热处理 声发射 饱和基体裂纹间距
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F-K域抗假频道内插 被引量:10
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作者 宜明理 严又生 +2 位作者 魏新 吕德林 汪德雯 《石油物探》 EI CSCD 2001年第2期36-41,共6页
地震数据空间假频会对地震数据的处理和成象造成不利的影响。为了消除其影响 ,需要进行道内插 ,特别是VSP和井间地震反射波具有陡斜率的特点 ,因此 ,道内插去假频显得尤为重要。我们采用了F -K域抗假频道内插。F -K域道内插具有速度快... 地震数据空间假频会对地震数据的处理和成象造成不利的影响。为了消除其影响 ,需要进行道内插 ,特别是VSP和井间地震反射波具有陡斜率的特点 ,因此 ,道内插去假频显得尤为重要。我们采用了F -K域抗假频道内插。F -K域道内插具有速度快、效率高的特点。本文给出了假频线性同相轴F -K域道内插方法的理论推导 ,并用理论数据和实际数据进行了验证 。 展开更多
关键词 地震勘探 道内插 f-K变换 空间假频 地震数据处理
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