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ROUGH MARCINKIEWICZ INTEGRALS ASSOCIATED TO SURFACES OF REVOLUTION ON PRODUCT DOMAINS 被引量:6
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作者 伍火熊 许建开 《Acta Mathematica Scientia》 SCIE CSCD 2009年第2期294-304,共11页
In this article, certain Marcinkiewicz integral operators associated to surfaces of revolution on product domains were studied. The Lp boundedness for these operators are established under some rather weak conditions ... In this article, certain Marcinkiewicz integral operators associated to surfaces of revolution on product domains were studied. The Lp boundedness for these operators are established under some rather weak conditions on kernels. The main results essentially improve and extend some known results. 展开更多
关键词 Marcinkiewicz integral product domain surfaces of revolution rough kernel
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L^p Bounds for the Commutators of Rough Singular Integrals Associated with Surfaces of Revolution
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作者 Zhendong Niu Kai Zhu Yanping Chen 《Analysis in Theory and Applications》 CSCD 2015年第2期176-183,共8页
In this paper, we establish the L^p (R-n+1) boundedness for the commutators of singular integrals associated to surfaces of revolution, { (t,Ф ( | t| ) ): t ∈R^n }, with rough kernels Ω∈ L(IogL)^2(sn... In this paper, we establish the L^p (R-n+1) boundedness for the commutators of singular integrals associated to surfaces of revolution, { (t,Ф ( | t| ) ): t ∈R^n }, with rough kernels Ω∈ L(IogL)^2(sn^-1), if Ф(|t|) = |t|. 展开更多
关键词 COMMUTATOR singular integral surface of revolution rough kernel.
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L^p BOUNDS FOR SINGULAR INTEGRALS ASSOCIATED TO SURFACES OF REVOLUTION ON PRODUCT DOMAINS
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作者 Huoxiong Wu Shanzhi Yang 《Analysis in Theory and Applications》 2007年第4期389-400,共12页
In this paper, the authors establish Lp boundedness for several classes of multiple singular integrals along surfaces of revolution with kernels satisfying rather weak size condition. The results of the corresponding ... In this paper, the authors establish Lp boundedness for several classes of multiple singular integrals along surfaces of revolution with kernels satisfying rather weak size condition. The results of the corresponding maximal truncated singular integrals are also obtained. The main results essentially improve and extend some known results. 展开更多
关键词 singular integral product domain surfaces of revolution rough kernel
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Oscillatory Strongly Singular Integral Associated to the Convex Surfaces of Revolution
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作者 Jiecheng Chen Shaoyong He Xiangrong Zhu 《Analysis in Theory and Applications》 CSCD 2016年第4期396-404,共9页
Here we consider the following strongly singular integral TΩ,γ,α,βf(x,t)=∫R^ne^i|y|^-βΩ(y/|y|)/|y|^n+af(x-y,t-γ(|y|))dy, where Ω∈L^p(S^n-1),p〉1,n〉1,α〉0 and γis convex on (0,∞).We p... Here we consider the following strongly singular integral TΩ,γ,α,βf(x,t)=∫R^ne^i|y|^-βΩ(y/|y|)/|y|^n+af(x-y,t-γ(|y|))dy, where Ω∈L^p(S^n-1),p〉1,n〉1,α〉0 and γis convex on (0,∞).We prove that there exists A(p,n) 〉 0 such that if β 〉 A(p,n) (1 +α), then TΩ,γ,α,β is bounded from L^2 (R^n+1) to itself and the constant is independent of γ Furthermore,when Ω∈ C^∞ (S^n-1 ), we will show that TΩ,γ,α,β is bounded from L^2 (R^n+l) to itself only if β〉 2α and the constant is independent of γ. 展开更多
关键词 Oscillatory strongly rough singular integral rough kernel surfaces of revolution.
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Surfaces of Revolution in Minkowski 3-Space Satisfying F (G) = k(G + C)
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作者 Ahmet Kazan Bayram Karadag 《Journal of Mathematics and System Science》 2013年第11期567-572,共6页
In this paper, we investigate the surfaces of revolution under the condition FIl(G) = k(G + C), where r11 is one of the Christoffel-like operators, G is the Gauss map of the surface, k is a non-constant function ... In this paper, we investigate the surfaces of revolution under the condition FIl(G) = k(G + C), where r11 is one of the Christoffel-like operators, G is the Gauss map of the surface, k is a non-constant function and C is a constant vector in Minkowski 3-space. 展开更多
关键词 Surface of revolution Gauss map Gaussian curvature Christoffel symbols.
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Triebel-Lizorkin space boundedness of rough singular integrals associated to surfaces of revolution 被引量:5
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作者 DING Yong YABUTA Kozo 《Science China Mathematics》 SCIE CSCD 2016年第9期1721-1736,共16页
We consider the boundedness of the rough singular integral operator T_(?,ψ,h) along a surface of revolution on the Triebel-Lizorkin space F^α_( p,q)(R^n) for Ω ∈ H^1((S^n-1)) and Ω ∈ Llog^+L(S^n-1)... We consider the boundedness of the rough singular integral operator T_(?,ψ,h) along a surface of revolution on the Triebel-Lizorkin space F^α_( p,q)(R^n) for Ω ∈ H^1((S^n-1)) and Ω ∈ Llog^+L(S^n-1) ∪_1 展开更多
关键词 singular integrals Triebel-Lizorkin spaces rough kernel surface of revolution
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On Quadratric Rotational Curved Surface
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作者 马国强 朱振兴 《Chinese Quarterly Journal of Mathematics》 CSCD 1993年第4期77-82,共6页
In this paper,a deterministic theorem is proposed for quadratic rotational curved surface.The relationship between invariants for quadratic rotational curved surface is established.In addition we give each type of equ... In this paper,a deterministic theorem is proposed for quadratic rotational curved surface.The relationship between invariants for quadratic rotational curved surface is established.In addition we give each type of equitions for rotational curved surface using the invariant. 展开更多
关键词 rotational ellipsoidal surface of revolution HYPERBOLOID parabolic surface
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Small symmetrical deformation and stress analysis of catenary shells of revolution
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作者 Bo-Hua Sun 《Acta Mechanica Sinica》 SCIE EI CAS CSCD 2022年第2期119-129,I0004,共12页
The catenary shells of revolution are widely used in church constructions due to their unique mechanics'features.To have a better understanding of the deformation and stress of the catenary shells of revolution,we... The catenary shells of revolution are widely used in church constructions due to their unique mechanics'features.To have a better understanding of the deformation and stress of the catenary shells of revolution,we formulate the principal radii for two kinds of catenary shells of revolution and their displacement type governing equations.Numerical simulations are carried out based on both Reissner-Meissner(R-M)mixed formulations and displacement formulations.Our investigations show that both deformation and stress response of elastic catenary shells of revolution are sensitive to its geometric parameter c,and reveal that the mechanics of the catenary shells of revolution has some advantages over the spherical shell for some loadings.Two complete codes in Maple are provided. 展开更多
关键词 CATENARY Surface of revolution Gauss curvature Minimal surface SHELLS DEFORMATION Stress MAPLE
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Factors Affecting Small Axial Cooling Fan Performance 被引量:4
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作者 Lihong Wang,Yingzi Jin,Baoling Cui,Yuzhen Jin,Jin Lin,Yanping Wang and Chuanyu Wu College of Mechanical Engineering & Automation,Zhejiang Sci-Tech University,Xiasha Education Zone,Hangzhou 310018,China 《Journal of Thermal Science》 SCIE EI CAS CSCD 2010年第2期126-131,共6页
Many factors such as outer diameter, hub ratio, blade numbers, shape and stagger angle affect the performance of small cooling fans. A small cooling fan was simulated using CFD software for three blade stagger angles ... Many factors such as outer diameter, hub ratio, blade numbers, shape and stagger angle affect the performance of small cooling fans. A small cooling fan was simulated using CFD software for three blade stagger angles (30.5°, 37.5°, 44.5°)and obtained the internal flow field and the static characteristics. Research indicated that the stagger angle has an obvious effect on the static characteristics of a fan. For flow rates below 0.0104 mVs, total pressure is the greatest when the stagger angle is 37.5°; flow rates higher than 0.0104 m^3/s, the total pressure is greatest when the stagger angle is 44.5° For the same flow rates, the velocity at inlet of pressure surface increases with in- creasing stagger angle, but the change of velocity on the suction surface is very small. For one model, vortices and the speed of revolution surfaces decrease with tip clearance increasing. But for other three models, increasing the stagger angle, the vortex intensity and speed of revolution surfaces at same height tip clearance increases, simultaneously, the position of vortex offset from the top of the rotor blade to the suction surface. 展开更多
关键词 Axial flow fan Stagger angle revolution surface Vortex intensity
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Existence and uniqueness for variational problem from progressive lens design
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作者 Huaiyu JIAN Hongbo ZENG 《Frontiers of Mathematics in China》 SCIE CSCD 2020年第3期491-505,共15页
We study a functional modelling the progressive lens design,which is a combination of Willmore functional and total Gauss curvature.First,we prove the existence for the minimizers of this class of functionals among th... We study a functional modelling the progressive lens design,which is a combination of Willmore functional and total Gauss curvature.First,we prove the existence for the minimizers of this class of functionals among the class of revolution surfaces rotated by the curves y=f(x)about the x-axis.Then,choosing such a minimiser as background surfaces to approximate the functional by a quadratic functional,we prove the existence and uniqueness of the solution to the Euler-Lagrange equation for the quadratic functionals.Our results not only provide a strictly mathematical proof for numerical methods,but also give a more reasonable and more extensive choice for the background surfaces. 展开更多
关键词 Variational problem Willmore surfaces of revolution fourth-order elliptic partial differential equation Dirichlet boundary value problem existence and uniquenes
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