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A Bombieri-type mean-value theorem concerning exponential sums over primes
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作者 展涛 刘建亚 《Chinese Science Bulletin》 SCIE EI CAS 1996年第5期363-366,共4页
In several classical problems in number theory,like the Goldbach problem or the twinprime problem,one has to treat the exponential
关键词 EXPONENTIAL sum over PRIMES mean-value theorem L-function.
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The Mean-value of Meromorphic Functions with Respect to a Generalized Boolean Transformation
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作者 Nattiwut MAUGMAI Teerapat SRICHAN 《Acta Mathematica Sinica,English Series》 SCIE CSCD 2019年第5期662-670,共9页
A formula for the mean-value distribution of certain meromorphic functions on a vertical line s = σ +iR under a generalized Boolean transformation, called rational Boolean transformation from R into itself, is derive... A formula for the mean-value distribution of certain meromorphic functions on a vertical line s = σ +iR under a generalized Boolean transformation, called rational Boolean transformation from R into itself, is derived using Birkhoff 's ergodic theorem. This formula is represented as a computable integral. Using the Cauchy's integral theorem, values of this integral corresponding to various possible cases are explicitly computed. 展开更多
关键词 Birkhoff's ergodic theorem BOOLEAN TRANSFORMATION mean-value MEROMORPHIC functions
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Damage alarming of long-span suspension bridge based on GPS-RTK monitoring 被引量:7
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作者 缪长青 王蔓 +2 位作者 田洪金 冯兆祥 陈策 《Journal of Central South University》 SCIE EI CAS CSCD 2015年第7期2800-2808,共9页
Structure damage identification and alarming of long-span bridge were conducted with three-dimensional dynamic displacement data collected by GPS subsystem of health monitoring system on Runyang Suspension Bridge.Firs... Structure damage identification and alarming of long-span bridge were conducted with three-dimensional dynamic displacement data collected by GPS subsystem of health monitoring system on Runyang Suspension Bridge.First,the effects of temperature on the main girder spatial position coordinates were analyzed from the transverse,longitudinal and vertical directions of bridge,and the correlation regression models were built between temperature and the position coordinates of main girder in the longitudinal and vertical directions;then the alarming indices of coordinate residuals were conducted,and the mean-value control chart was applied to making statistical pattern identification for abnormal changes of girder dynamic coordinates;and finally,the structural damage alarming method of main girder was established.Analysis results show that temperature has remarkable correlation with position coordinates in the longitudinal and vertical directions of bridge,and has weak correlation with the transverse coordinates.The 3%abnormal change of the longitudinal coordinates and 5%abnormal change of the vertical ones caused by structural damage are respectively identified by the mean-value control chart method based on GPS dynamic monitoring data and hence the structural abnormalities state identification and damage alarming for main girder of long-span suspension bridge can be realized in multiple directions. 展开更多
关键词 long-span suspension bridge damage alarming mean-value control chart GPS displacement temperature correlation
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Common Properties of Riemann Zeta Function, Bessel Functions and Gauss Function Concerning Their Zeros 被引量:1
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作者 Alfred Wünsche 《Advances in Pure Mathematics》 2019年第3期281-316,共36页
The behavior of the zeros in finite Taylor series approximations of the Riemann Xi function (to the zeta function), of modified Bessel functions and of the Gaussian (bell) function is investigated and illustrated in t... The behavior of the zeros in finite Taylor series approximations of the Riemann Xi function (to the zeta function), of modified Bessel functions and of the Gaussian (bell) function is investigated and illustrated in the complex domain by pictures. It can be seen how the zeros in finite approximations approach to the genuine zeros in the transition to higher-order approximation and in case of the Gaussian (bell) function that they go with great uniformity to infinity in the complex plane. A limiting transition from the modified Bessel functions to a Gaussian function is discussed and represented in pictures. In an Appendix a new building stone to a full proof of the Riemann hypothesis using the Second mean-value theorem is presented. 展开更多
关键词 RIEMANN Zeta and Xi Function Modified BESSEL Functions Second mean-value THEOREM or Gauss-Bonnet THEOREM RIEMANN Hypothesis
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Star-shaped Differentiable Functions and Star-shaped Differentials
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作者 PAN SHAO-RONG ZHANG HONG-WEI ZHANG LI-WEI 《Communications in Mathematical Research》 CSCD 2010年第1期41-52,共12页
Based on the isomorphism between the space of star-shaped sets and the space of continuous positively homogeneous real-valued functions, the star-shaped differential of a directionally differentiable function is defin... Based on the isomorphism between the space of star-shaped sets and the space of continuous positively homogeneous real-valued functions, the star-shaped differential of a directionally differentiable function is defined. Formulas for star-shaped differential of a pointwise maximum and a pointwise minimum of a finite number of directionally differentiable functions, and a composite of two directionaUy differentiable functions are derived. Furthermore, the mean-value theorem for a directionaUy differentiable function is demonstrated. 展开更多
关键词 The space of star-shaped sets gauge function isometrical isomorphism directionally differentiable function star-shaped differential mean-value theorem
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Approach to Riemann Hypothesis by Combined Commensurable Step Function Approximation with Bonnet Method
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作者 Alfred Wünsche 《Advances in Pure Mathematics》 2020年第5期201-228,共28页
To the Riemann hypothesis, we investigate first the approximation by step-wise Omega functions Ω(u) with commensurable step lengths u0 concerning their zeros in corresponding Xi functions Ξ(z). They are periodically... To the Riemann hypothesis, we investigate first the approximation by step-wise Omega functions Ω(u) with commensurable step lengths u0 concerning their zeros in corresponding Xi functions Ξ(z). They are periodically on the y-axis with period proportional to inverse step length u0. It is found that they possess additional zeros off the imaginary y-axis and additionally on this axis and vanish in the limiting case u0 → 0 in complex infinity. There remain then only the “genuine” zeros for Xi functions to continuous Omega functions which we call “analytic zeros” and which lie on the imaginary axis. After a short repetition of the Second mean-value (or Bonnet) approach to the problem and the derivation of operational identities for Trigonometric functions we give in Section 8 a proof for the position of these genuine “analytic” zeros on the imaginary axis by construction of a contradiction for the case off the imaginary axis. In Section 10, we show by a few examples that monotonically decreasing of the Omega functions is only a sufficient condition for the mentioned property of the positions of zeros on the imaginary axis but not a necessary one. 展开更多
关键词 RIEMANN Zeta FUNCTION RIEMANN Xi FUNCTION Second mean-value APPROACH (Bonnet Method) Chebyshev Polynomials BESSEL Functions
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On the mean-square of the error term related ton ∑_(n≤x)λ~2(nj) 被引量:2
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作者 LAO HuiXue SANKARANARAYANAN Ayyadurai 《Science China Mathematics》 SCIE 2011年第5期855-864,共10页
We prove a non-trivial upper bound for the quantity ∫X2|X ∑_(n≤x)λ~2(nj)-c(j-1)x| 2dx for j=2, 3, 4.
关键词 Rankin-Selberg zeta-function symmetric square L-functions mean-value theorems
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On Odd Goldbach Problem Under General Riemann Hypothesis 被引量:1
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作者 王天泽 陈景润 《Science China Mathematics》 SCIE 1993年第6期682-691,共10页
This paper proves that every odd integer N≥exp(114) can be written as a sum of three primes under GRH.
关键词 DISTRIBUTION of PRIMES mean-value estimation trigonometrical SUMS
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Harmonic coordinates for real-time image cloning 被引量:1
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作者 Rui WANG Wei-feng CHEN Ming-hao PAN Hu-jun BAO 《Journal of Zhejiang University-Science C(Computers and Electronics)》 SCIE EI 2010年第9期690-698,共9页
Traditional gradient domain seamless image cloning is a time consuming task,requiring the solving of Poisson's equations whenever the shape or position of the cloned region changes.Recently,a more efficient altern... Traditional gradient domain seamless image cloning is a time consuming task,requiring the solving of Poisson's equations whenever the shape or position of the cloned region changes.Recently,a more efficient alternative,the mean-value coordinates(MVCs) based approach,was proposed to interpolate interior pixels by a weighted combination of values along the boundary.However,this approach cannot faithfully preserve the gradient in the cloning region.In this paper,we introduce harmonic cloning,which uses harmonic coordinates(HCs) instead of MVCs in image cloning.Benefiting from the non-negativity and interior locality of HCs,our interpolation generates a more accurate harmonic field across the cloned region,to preserve the results with as high a quality as with Poisson cloning.Furthermore,with optimizations and implementation on a graphic processing unit(GPU),we demonstrate that,compared with the method using MVCs,our harmonic cloning gains better quality while retaining real-time performance. 展开更多
关键词 Seamless cloning Poisson’s equation Harmonic coordinates(HCs) mean-value coordinates(MVCs) GPU acceleration
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SOME ALMOST ALL RESULTS CONCERNINGTHE PJATECKII-SAPIRO PRIME NUMBERS 被引量:1
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作者 FISCHER,D. ZHANTAO 《Chinese Annals of Mathematics,Series B》 SCIE CSCD 1996年第3期279-288,共10页
The distribution of the Pjateckii-Sapiro prime numbers in arithmetic progressions is investigated, and a Bombier i- Vinogr adov typ e mean- value t heorem and anot her almost all resultconcerning this problem are esta... The distribution of the Pjateckii-Sapiro prime numbers in arithmetic progressions is investigated, and a Bombier i- Vinogr adov typ e mean- value t heorem and anot her almost all resultconcerning this problem are established. 展开更多
关键词 Pjateckii-Sapiro prime number Arithmetic progression Bombieri-Vinogradov type mean-value theorem
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General divisor functions in arithmetic progressions to large moduli 被引量:1
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作者 WEI Fei XUE BoQing ZHANG YiTang 《Science China Mathematics》 SCIE CSCD 2016年第9期1663-1668,共6页
We prove a result on the distribution of the general divisor functions in arithmetic progressions to smooth moduli which exceed the square root of the length.
关键词 divisor function arithmetic progression to large moduli mean-value estimate
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GOLDBACH CONJECTURE AND PARITY PROBLEM
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作者 张明尧 《Chinese Science Bulletin》 SCIE EI CAS 1988年第15期1238-1240,共3页
Let N be a large positive even number and p, q, P1,... primes.
关键词 GOLDBACH CONJECTURE PARITY PROBLEM SIEVE method mean-value theorem
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DISTRIBUTION OF k-FULL INTEGERS
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作者 展涛 《Science China Mathematics》 SCIE 1989年第1期20-37,共18页
In this paper we discuss the error function △_k(x) in the problem of distribution of k-fullintegers. Under the Riemann hypothesis, an asymptotic formula for the mean-value of △_k(x)is given.
关键词 k-full INTEGERS RIEMANN HYPOTHESIS mean-value THEOREM Tauber theorem.
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Model Transduction for Triangle Meshes
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作者 吴怀宇 潘春洪 +1 位作者 查红彬 马颂德 《Journal of Computer Science & Technology》 SCIE EI CSCD 2010年第3期583-594,共12页
This paper proposes a novel method, called model transduction, to directly transfer pose between different meshes, without the need of building the skeleton configurations for meshes. Different from previous retargett... This paper proposes a novel method, called model transduction, to directly transfer pose between different meshes, without the need of building the skeleton configurations for meshes. Different from previous retargetting methods, such as deformation transfer, model transduction does not require a reference source mesh to obtain the source deformation, thus effectively avoids unsatisfying results when the source and target have different reference poses. Moreover, we show other two applications of the model transduction method: pose correction after various mesh editing operations, and skeleton-free deformation animation based on 3D Mocap (Motion capture) data. Model transduction is based on two ingredients: model deformation and model correspondence. Specifically, based on the mean-value manifold operator, our mesh deformation method produces visually pleasing deformation results under large angle rotations or big-scale translations of handles. Then we propose a novel scheme for shape-preserving correspondence between manifold meshes. Our method fits nicely in a unified framework, where the similar type of operator is applied in all phases. The resulting quadratic formulation can be efficiently minimized by fast solving the sparse linear system. Experimental results show that model transduction can successfully transfer both complex skeletal structures and subtle skin deformations. 展开更多
关键词 retargetting mesh deformation mean-value manifold operator cross-parameterization model transduction
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THE GOLDBACH-VINOGRDOV THEOREM WITH THREE PRIMES IN A THIN SUBSET 被引量:1
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作者 LIU JIANYA (Department of Mathematics, Shandong University, Jinan 250100, China.) 《Chinese Annals of Mathematics,Series B》 SCIE CSCD 1998年第4期479-488,共10页
It is proved constructively that there exists a thin subset S of primes, satisfying for some absolute constant c>0, such that every sufficiently large odd integer N can beLet r be prime, and hi positive integers with... It is proved constructively that there exists a thin subset S of primes, satisfying for some absolute constant c>0, such that every sufficiently large odd integer N can beLet r be prime, and hi positive integers with (bj, r) = 1,j = 1, 2, 3. It is also proved that, for almost all prime moduli r< log- N, every sufficiently large odd integer N = b1 + b2 +ba(modr) can be represented as where c > 0 is an absolute constant. 展开更多
关键词 Goldbach-Vinogradov theorem Exponential sum PRIMES Arithmetic progression mean-value theorem
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