期刊文献+
共找到21,898篇文章
< 1 2 250 >
每页显示 20 50 100
THE JACKSON THEOREM IN B_a SPACES 被引量:3
1
作者 Wu Garidi (Inner Mongolia Normal University,China) 《Analysis in Theory and Applications》 1996年第2期60-69,共10页
As everyone knows,the classical Jackson theorem in approximation theory was generalized in Lp spaces by R.A.Devore.In this paper,we proved the Jackson theorem in B,spaces which introduced by Ding Xia Xi,
关键词 THE jackson theorem IN B_a SPACES APPI
在线阅读 下载PDF
DIRECT AND INVERSE THEOREMS FOR JACKSON MEANS OF ENTIRE EXPONENTIAL TYPE IN B_α SPACES
2
作者 盛宝怀 刘三阳 《Acta Mathematica Scientia》 SCIE CSCD 1999年第S1期497-504,共8页
This paper presents a new type of interpolation of Bα spaces,with which a new characterization of Bα spaces by the Jackson means of entire exponential type is given.
关键词 B_α spaces Besov spaces interpolation spaces jackson means
在线阅读 下载PDF
The Paley-Wiener Theorem for General Weighted Hardy Spaces on Tube Domains
3
作者 HUANG Yun ZHANG Dawei 《应用数学》 北大核心 2025年第3期841-849,共9页
In this paper,the Paley-Wiener theorem is extended to the analytic function spaces with general weights.We first generalize the theorem to weighted Hardy spaces Hp(0<p<∞)on tube domains by constructing a sequen... In this paper,the Paley-Wiener theorem is extended to the analytic function spaces with general weights.We first generalize the theorem to weighted Hardy spaces Hp(0<p<∞)on tube domains by constructing a sequence of L^(1)functions converging to the given function and verifying their representation in the form of Fourier transform to establish the desired result of the given function.Applying this main result,we further generalize the Paley-Wiener theorem for band-limited functions to the analytic function spaces L^(p)(0<p<∞)with general weights. 展开更多
关键词 Paley-Wiener theorem Fourier transform Weighted Hardy space Tube domain
在线阅读 下载PDF
A Metamodeling Approach to Enforcing the No-Cloning Theorem in Quantum Software Engineering
4
作者 Dae-Kyoo Kim 《Computers, Materials & Continua》 2025年第8期2549-2572,共24页
Quantum software development utilizes quantum phenomena such as superposition and entanglement to address problems that are challenging for classical systems.However,it must also adhere to critical quantum constraints... Quantum software development utilizes quantum phenomena such as superposition and entanglement to address problems that are challenging for classical systems.However,it must also adhere to critical quantum constraints,notably the no-cloning theorem,which prohibits the exact duplication of unknown quantum states and has profound implications for cryptography,secure communication,and error correction.While existing quantum circuit representations implicitly honor such constraints,they lack formal mechanisms for early-stage verification in software design.Addressing this constraint at the design phase is essential to ensure the correctness and reliability of quantum software.This paper presents a formal metamodeling framework using UML-style notation and and Object Constraint Language(OCL)to systematically capture and enforce the no-cloning theorem within quantum software models.The proposed metamodel formalizes key quantum concepts—such as entanglement and teleportation—and encodes enforceable invariants that reflect core quantum mechanical laws.The framework’s effectiveness is validated by analyzing two critical edge cases—conditional copying with CNOT gates and quantum teleportation—through instance model evaluations.These cases demonstrate that the metamodel can capture nuanced scenarios that are often mistaken as violations of the no-cloning theorem but are proven compliant under formal analysis.Thus,these serve as constructive validations that demonstrate the metamodel’s expressiveness and correctness in representing operations that may appear to challenge the no-cloning theorem but,upon rigorous analysis,are shown to comply with it.The approach supports early detection of conceptual design errors,promoting correctness prior to implementation.The framework’s extensibility is also demonstrated by modeling projective measurement,further reinforcing its applicability to broader quantum software engineering tasks.By integrating the rigor of metamodeling with fundamental quantum mechanical principles,this work provides a structured,model-driven approach that enables traditional software engineers to address quantum computing challenges.It offers practical insights into embedding quantum correctness at the modeling level and advances the development of reliable,error-resilient quantum software systems. 展开更多
关键词 METAMODELING no-cloning theorem quantum software software engineering
在线阅读 下载PDF
Scaling Rule,Energy Distribution and Energy Level Analysis for Morse Oscillator by Virtue of Hermann-Feynman Theorem
5
作者 Zhi-Long Wan Jun-Hua Chen Hong-Yi Fan 《Chinese Journal of Chemical Physics》 2025年第3期368-372,I0109,共6页
We propose the scaling rule of Morse oscillator,based on this rule and by virtue of the Her-mann-Feymann theorem,we respectively obtain the distribution of potential and kinetic ener-gy of the Morse Hamiltonian.Also,w... We propose the scaling rule of Morse oscillator,based on this rule and by virtue of the Her-mann-Feymann theorem,we respectively obtain the distribution of potential and kinetic ener-gy of the Morse Hamiltonian.Also,we derive the exact upper limit of physical energy level.Further,we derive some recursive relations for energy matrix elements of the potential and other similar operators in the context of Morse oscillator theory. 展开更多
关键词 Morse oscillator Scaling rule Hermann-Feynman theorem
在线阅读 下载PDF
Herglotz type Noether theorems of nonholonomic systems with generalized fractional derivatives
6
作者 Yuan-Yuan Deng Yi Zhang 《Theoretical & Applied Mechanics Letters》 2025年第2期179-187,共9页
Fractional calculus is widely used to deal with nonconservative dynamics because of its memorability and non-local properties.In this paper,the Herglotz principle with generalized operators is discussed,and the Herglo... Fractional calculus is widely used to deal with nonconservative dynamics because of its memorability and non-local properties.In this paper,the Herglotz principle with generalized operators is discussed,and the Herglotz type equations for nonholonomic systems are established.Then,the Noether symmetries are studied,and the conserved quantities are obtained.The results are extended to nonholonomic canonical systems,and the Herglotz type canonical equations and the Noether theorems are obtained.Two examples are provided to demonstrate the validity of the methods and results. 展开更多
关键词 Nonholonomic system Herglotz principle Noether theorem Generalized operators
在线阅读 下载PDF
ECHOS OF THE STEINER-LEHMUS EQUAL BISECTORS THEOREM
7
作者 Christoph BÖRGERS Eric L.GRINBERG +1 位作者 Mehmet ORHON Junhao SHEN 《Acta Mathematica Scientia》 2025年第1期257-263,共7页
The Steiner-Lehmus equal bisectors theorem originated in the mid 19th century.Despite its age,it would have been accessible to Euclid and his contemporaries.The theorem remains evergreen,with new proofs continuing to ... The Steiner-Lehmus equal bisectors theorem originated in the mid 19th century.Despite its age,it would have been accessible to Euclid and his contemporaries.The theorem remains evergreen,with new proofs continuing to appear steadily.The theorem has fostered discussion about the nature of proof itself,direct and indirect.Here we continue the momentum by providing a trigonometric proof,relatively short,based on an analytic estimate that leverages algebraic trigonometric identities.Many proofs of the theorem exist in the literature.Some of these contain key ideas that already appeared in C.L.Lehmus’1850 proofs,not always with citation.In the aim of increasing awareness of and making more accessible Lehmus’proofs,we provide an annotated translation.We conclude with remarks on different proofs and relations among them. 展开更多
关键词 Steiner-Lehmus theorem equal bisectors
在线阅读 下载PDF
LIOUVILLE THEOREM FOR 3D STATIONARY Q-TENSOR SYSTEM OF LIQUID CRYSTAL
8
作者 HU Li-li ZHOU Yan-ping BIE Qun-yi 《数学杂志》 2025年第4期283-292,共10页
In this paper,we study Liouville theorem for the 3D stationary Q-tensor system of liquid crystal in Lorentz and Morrey spaces.Under some additional hypotheses,stated in terms of Lorentz and Morrey spaces,using energy ... In this paper,we study Liouville theorem for the 3D stationary Q-tensor system of liquid crystal in Lorentz and Morrey spaces.Under some additional hypotheses,stated in terms of Lorentz and Morrey spaces,using energy estimation,we obtain that the trivial solution u=Q=0 is the unique solution.Our theorems correspond to improvements of some recent results and contain some known results as particular cases. 展开更多
关键词 Lorentz spaces Morrey spaces Q-tensor liquid crystal Liouville theorem
在线阅读 下载PDF
VANISHING THEOREMS OF THE BASIC P-HARMONIC FORMS ON COMPLETE FOLIATED RIEMANNIAN MANIFOLDS
9
作者 NIE Yan-ci SHEN Zheng-han 《数学杂志》 2025年第3期195-204,共10页
In this paper,we study the basic p-harmonic forms on the complete foliated Riemannian manifolds.By using the method in[1],we show that if the basic mean curvature form is bounded and co-closed,and the transversal curv... In this paper,we study the basic p-harmonic forms on the complete foliated Riemannian manifolds.By using the method in[1],we show that if the basic mean curvature form is bounded and co-closed,and the transversal curvature operator is nonnegative and positive at least one point,then we obtain a vanishing theorem for L^(p)-integrably p-harmonic r-forms. 展开更多
关键词 basic p-harmonic form vanishing theorem foliated Riemannian manifold
在线阅读 下载PDF
A VECTOR BUNDLE VALUED MIXED HARD LEFSCHETZ THEOREM
10
作者 Zeng CHEN Guanxiang WANG 《Acta Mathematica Scientia》 2025年第2期514-524,共11页
In this paper,we obtain a vector bundle valued mixed hard Lefschetz theorem.The argument is mainly based on the works of Tien-Cuong Dinh and Viet-Anh Nguyen.
关键词 hard Lefschetz theorem holomorphic vector bundle Hermitian fat vector bundle
在线阅读 下载PDF
Sub-Riemannian Limits,Connections with Torsion and the Gauss-Bonnet Theorem for Four Dimensional Twisted BCV Spaces
11
作者 LI Hong-feng LIU Ke-feng WANG Yong 《Chinese Quarterly Journal of Mathematics》 2025年第2期111-134,共24页
In this paper,we compute sub-Riemannian limits of some important curvature variants associated with the connection with torsion for four dimensional twisted BCV spaces and derive a Gauss-Bonnet theorem for four dimens... In this paper,we compute sub-Riemannian limits of some important curvature variants associated with the connection with torsion for four dimensional twisted BCV spaces and derive a Gauss-Bonnet theorem for four dimensional twisted BCV spaces. 展开更多
关键词 Gauss-Bonnet theorem Sub-Riemannian limit Twisted BCV spaces Orthogonal connections with torsion
在线阅读 下载PDF
Liouville Theorem for 3D Steady Q-Tensor System of Liquid Crystal in Mixed Lorentz Spaces
12
作者 WAN Mengru DENG Xuemei BIE Qunyi 《Wuhan University Journal of Natural Sciences》 2025年第3期235-240,共6页
this paper,we study Liouville theorem for 3D steady Q-tensor system of liquid crystal in mixed Lorentz spaces.We obtain u=0,Q=0 on the conditions that μ∈L^(p,∞x_(1)L^(q,∞x_(2)L^(r,∞x_(3)(R^(4)∩H^(1)(R^(3),Q∈H^(... this paper,we study Liouville theorem for 3D steady Q-tensor system of liquid crystal in mixed Lorentz spaces.We obtain u=0,Q=0 on the conditions that μ∈L^(p,∞x_(1)L^(q,∞x_(2)L^(r,∞x_(3)(R^(4)∩H^(1)(R^(3),Q∈H^(2)(R^(3),p,q,r∈(3,∞],and 1/p+1/q+1/r≥2/3, which extends some known results. 展开更多
关键词 mixed Lorentz spaces Q-tensor system of liquid crystal Liouville theorem
原文传递
Hardy型A_μ空间中的Jackson定理 被引量:4
13
作者 陈英伟 王志军 刘玉军 《河北师范大学学报(自然科学版)》 CAS 北大核心 2013年第2期113-118,共6页
在Cn中的星形圆型上对Hardy型Aμ函数空间中的全纯函数构造逼近多项式,得出逼近的正定理即Jackson定理.作为Aμ空间的具体例子,给出了Fock空间Apm上的Jackson定理.
关键词 Aμ空间 多项式逼近 jackson定理 HARDY空间 FOCK空间
在线阅读 下载PDF
Jackson手术床和普通床仰卧位、俯卧位对中心静脉压与腹内压的影响 被引量:6
14
作者 倪丽亚 马宇 +1 位作者 文平山 邓小明 《第二军医大学学报》 CAS CSCD 北大核心 2017年第3期282-288,共7页
目的观察腰椎手术中使用不同手术床仰卧位、俯卧位对患者中心静脉压(CVP)与腹内压(IAP)的影响,为临床俯卧位手术液体管理提供参考。方法选择第二军医大学长海医院2014年9月至12月全麻下行腰椎手术的患者36例,手术中使用Jackson手术床(Ja... 目的观察腰椎手术中使用不同手术床仰卧位、俯卧位对患者中心静脉压(CVP)与腹内压(IAP)的影响,为临床俯卧位手术液体管理提供参考。方法选择第二军医大学长海医院2014年9月至12月全麻下行腰椎手术的患者36例,手术中使用Jackson手术床(Jackson组)与普通手术床(Normal组)患者各18例。观察并记录两组患者在麻醉诱导后仰卧位、俯卧位10min时、手术结束前俯卧位及手术结束后仰卧位的CVP、IAP、平均动脉压(MAP)、心率(HR),以及麻醉诱导后患者仰卧位和俯卧位10、30、60min时的氧合指数(OI)。采用线性回归方程分析IAP与CVP及不同体位IAP、CVP的相关性。结果与仰卧位相比,两组患者俯卧位10 min时IAP均下降(P<0.01),Jackson组CVP下降(P<0.01),Normal组CVP升高(P<0.01);Jackson组MAP、HR差异无统计学意义,Normal组MAP、HR均下降(P<0.05);Jackson组OI升高(P<0.01),Normal组OI差异无统计学意义。Jackson组患者俯卧位下IAP与CVP呈正相关(r=0.709 3,P<0.01),Normal组IAP与CVP之间无相关性(P>0.05);Jackson组和Normal组仰卧位下CVP与俯卧位下CVP均呈正相关(r=0.760 7,0.829 7;P<0.01);Jackson组和Normal组仰卧位下IAP与俯卧位下IAP均呈正相关(r=0.752 8,0.920 0;P<0.01)。结论使用Jackson手术床的患者翻身前后对循环影响小,俯卧位手术更有利于改善氧合。IAP可作为补液速度和补液量的补充监测指标。 展开更多
关键词 中心静脉压 腹内压 俯卧位 麻醉 jackson手术床
原文传递
有界对称域上Ω代数中的Jackson定理 被引量:2
15
作者 王志军 陈英伟 《河北大学学报(自然科学版)》 CAS 北大核心 2014年第4期342-346,共5页
对多复变Cn中有界对称域Ω上球代数的中心逼近性质进行了研究.通过建立多项式偏差估计,最终获得了Jackson型定理.
关键词 Ω代数 jackson定理 光滑模 有界对称域
在线阅读 下载PDF
四元数Hardy空间中的slice正则Jackson定理 被引量:1
16
作者 陈英伟 王志军 《河北大学学报(自然科学版)》 CAS 北大核心 2019年第3期230-234,共5页
对于非交换领域四元数上2种类型的Hardy空间,构造了新的de la Vallée Poussin卷积算子,进而得到了高阶光滑模的slice正则Jackson逼近定理.
关键词 四元数Hardy空间 jackson定理 de la Vallée Poussin算子 正则多项式
在线阅读 下载PDF
球面带形平移网络逼近的Jackson定理 被引量:4
17
作者 盛宝怀 《数学进展》 CSCD 北大核心 2006年第3期325-335,共11页
研究了球面带型平移网络逼近阶用球面调和多项式的最佳逼近及光滑模的刻画问题.借助于球调和多项式的最佳逼近多项式和Riesz平均构造出了单位球面Sq上的带形平移网络,并建立了球面带形平移网络对Lp(Sq)中函数一致逼近的Jackson型定理... 研究了球面带型平移网络逼近阶用球面调和多项式的最佳逼近及光滑模的刻画问题.借助于球调和多项式的最佳逼近多项式和Riesz平均构造出了单位球面Sq上的带形平移网络,并建立了球面带形平移网络对Lp(Sq)中函数一致逼近的Jackson型定理.所得结果表明球面带形平移网络可以达到球调和多项式的逼近阶. 展开更多
关键词 球调和多项式 平移网络 RIESZ平均 逼近 jackson定理
在线阅读 下载PDF
Müntz有理逼近的点态Jackson型估计 被引量:6
18
作者 王建力 《数学杂志》 CSCD 北大核心 2004年第4期403-405,共3页
Müntz系统的非线性使得其逼近速度刻画成为一个困难的问题 .本文考虑条件λn+ 1 -λn ≥Mn2 下 ,Müntz系统 {xλn}有理逼近的一个点态Jackson型估计 ,这是对J.
关键词 Muentz有理函数 点态逼近 jackson型估计
在线阅读 下载PDF
L^p空间Shepard算子(λ=1)逼近的Jackson阶 被引量:1
19
作者 王建力 虞旦盛 周颂平 《浙江大学学报(理学版)》 CAS CSCD 2002年第6期610-614,625,共6页
考虑了Lp[0,1]空间Shepard算子S*n1(f,x)的逼近阶估计,对f∈Lp[0,1](p>1),得到了估计式:‖S*n1(f)-f‖p≤Cpω(f,log-1n)p;对f∈L1[0,1],得到了估计式‖S*n1(f)-f‖1≤Cω(f,log-1n)1.
关键词 L^P空间 SHEPARD算子 L^p-逼近 jackson 算子逼近 逼近度
在线阅读 下载PDF
无穷维Jackson网络过程的存在性和遍历性 被引量:2
20
作者 程慧慧 毛永华 《北京师范大学学报(自然科学版)》 CAS CSCD 北大核心 2011年第2期111-114,共4页
研究了无穷维Jackson网络过程的存在性.并且利用耦合方法研究了无穷维Jackson网络的随机可比性,进而得到它的遍历性.
关键词 jackson网络 过程存在性 随机可比 遍历性
在线阅读 下载PDF
上一页 1 2 250 下一页 到第
使用帮助 返回顶部