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GENERALIZED CESàRO OPERATORS ON DIRICHLET-TYPE SPACES
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作者 Jianjun JIN Shuan TANG 《Acta Mathematica Scientia》 SCIE CSCD 2022年第1期212-220,共9页
In this note,we introduce and study a new kind of generalized Cesaro operator,C_(μ),induced by a positive Borel measure μ on(0,1)between Dirichlet-type spaces.We characterize the measures μ for which Cμis bounded(... In this note,we introduce and study a new kind of generalized Cesaro operator,C_(μ),induced by a positive Borel measure μ on(0,1)between Dirichlet-type spaces.We characterize the measures μ for which Cμis bounded(compact)from one Dirichlet-type space,Da,into another one,D_(β). 展开更多
关键词 generalized cesàro operator Dirichlet-type spaces Carleson measure boundedness and compactness of operator
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Extended Cesáro Operators from BMOA Spaces to Bloch-Type
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作者 叶善力 《Journal of Mathematical Research and Exposition》 CSCD 北大核心 2007年第3期484-488,共5页
In this paper the extended Cesāro operator Tg is characterized between the α-Bloch spaces Bα and the BMOA space on the unit disk. Some necessary and sufficient conditions are given for which Tg is a bounded operato... In this paper the extended Cesāro operator Tg is characterized between the α-Bloch spaces Bα and the BMOA space on the unit disk. Some necessary and sufficient conditions are given for which Tg is a bounded operator or a compact operator from BMOA to Bα. 展开更多
关键词 extended cesāro operators Bloch spaces BMOA spaces
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基于Kinect和ROS的骨骼轨迹人体姿态识别研究 被引量:11
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作者 胡敦利 柯浩然 张维 《高技术通讯》 EI CAS 北大核心 2020年第2期177-184,共8页
为了解决不完整人体动作识别的问题,在机器人操作系统(robot operating system,ROS)下提出利用骨骼节点向量的角度累计变化作为特征向量,并采用自适应能量的方法划分视频人体动作。在人体解剖学的基础上建立投影坐标平面,进行空间位置... 为了解决不完整人体动作识别的问题,在机器人操作系统(robot operating system,ROS)下提出利用骨骼节点向量的角度累计变化作为特征向量,并采用自适应能量的方法划分视频人体动作。在人体解剖学的基础上建立投影坐标平面,进行空间位置和骨骼角度的计算。通过时间金字塔方法对不同时间间隔的骨骼角度数据编码,形成多级特征向量更好地表示人体动作。在人体受遮挡情况下,使用扩展卡尔曼滤波预测骨骼节点坐标,提高骨骼坐标的准确性。该方法具有旋转、平移不变性,识别4种不完整人体动作的正确率达到了92.25%。 展开更多
关键词 自适应能量 时间金字塔 扩展卡尔曼滤波 机器人操作系统(roS) 预测
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Generalized Cesàro Operator on Dirichlet Spaces
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作者 唐笑敏 《Journal of Mathematical Research and Exposition》 CSCD 北大核心 2006年第2期207-212,共6页
In this paper, we study the boundedness of the generalized Cesàro operator on the weighted Dirichlet spaces Dα={f∈H(D);‖f‖Dα^2=|f(0)|^2+∫D|f'(z)|^2(1-|z|^αdm(z)〈+∞},where -1 〈 α 〈+... In this paper, we study the boundedness of the generalized Cesàro operator on the weighted Dirichlet spaces Dα={f∈H(D);‖f‖Dα^2=|f(0)|^2+∫D|f'(z)|^2(1-|z|^αdm(z)〈+∞},where -1 〈 α 〈+∞ and H(D) is the class of all holomorphic functions on the unit disc D. 展开更多
关键词 weighted Dirichlet space generalized cesàro operator weighted compositiono perator boundedness.
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Compact Ceshro Operators from Spaces H(p,q,u) to H(p, q, v) 被引量:2
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作者 Xue-jun Zhang Yu-ming Chu 《Acta Mathematicae Applicatae Sinica》 SCIE CSCD 2006年第3期437-442,共6页
Let μ and v be normal functions and let Tg be the extended Ceshso operator in terms of the symbol g. In this paper, we will characterize those g so that Tg is bounded (or compact) from mixed norm spaces H(p, q, μ... Let μ and v be normal functions and let Tg be the extended Ceshso operator in terms of the symbol g. In this paper, we will characterize those g so that Tg is bounded (or compact) from mixed norm spaces H(p, q, μ) to H(p, q, v) in the unit ball of C^n, Furthermore, as applications, some analogous results are also given on weighted Bergman spaces and Dirichlet type spaces. 展开更多
关键词 cesàro operator BOUNDEDNESS COMPACTNESS mixed norm space
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Composition Cesàro Operator on the Normal Weight Zygmund Space in High Dimensions 被引量:1
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作者 Si XU Xuejun ZHANG Shenlian LI 《Chinese Annals of Mathematics,Series B》 SCIE CSCD 2021年第1期69-84,共16页
Let n>1 and B be the unit ball in n dimensions complex space C^(n).Suppose thatφis a holomorphic self-map of B andψ∈H(B)withψ(0)=0.A kind of integral operator,composition Cesàro operator,is defined by T_(... Let n>1 and B be the unit ball in n dimensions complex space C^(n).Suppose thatφis a holomorphic self-map of B andψ∈H(B)withψ(0)=0.A kind of integral operator,composition Cesàro operator,is defined by T_(φ)ψ(f)(z)=∫^(1)0f[φ(tz)]Rψ(tz)dt/t,f∈(B)z∈B.In this paper,the authors characterize the conditions that the composition Cesàro operator T_φ,ψis bounded or compact on the normal weight Zygmund space Z_μ(B).At the same time,the sufficient and necessary conditions for all cases are given. 展开更多
关键词 Normal weight Zygmund space Composition cesàro operator Boundedness and compactness
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基于自适应多提议分布粒子滤波的蒙特卡洛定位算法 被引量:14
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作者 罗元 庞冬雪 +1 位作者 张毅 苏琴 《计算机应用》 CSCD 北大核心 2016年第8期2352-2356,共5页
针对基于Cubature粒子滤波的蒙特卡罗定位(CMCL)算法存在的计算量大、实时处理能力较差的问题,提出一种基于自适应多提议分布粒子滤波的蒙特卡罗定位(AMPD-MCL)算法。该算法利用Cubature卡尔曼滤波和扩展卡尔曼滤波改进提议分布,融入当... 针对基于Cubature粒子滤波的蒙特卡罗定位(CMCL)算法存在的计算量大、实时处理能力较差的问题,提出一种基于自适应多提议分布粒子滤波的蒙特卡罗定位(AMPD-MCL)算法。该算法利用Cubature卡尔曼滤波和扩展卡尔曼滤波改进提议分布,融入当前观测信息,减弱粒子退化现象;重采样部分采用Kullback-Leibler距离(KLD)采样,根据粒子在状态空间的分布状况,在线调整下一次滤波迭代所需粒子数,从而减小计算量。仿真实验验证了自适应多提议分布粒子滤波(AMPD-PF)的有效性;同时在机器人操作系统(ROS)上进行实验,结果表明改进算法的平均定位精度达到19.891 cm,定位所需粒子数稳定在60,定位时间为45.543 s,较CMCL算法在定位精度上提高了71.03%,时间缩短了63.10%。实验结果表明,AMPD-MCL算法减小了定位误差,能实时在线调整粒子数,有效减少了算法计算量,提高了实时处理能力。 展开更多
关键词 蒙特卡洛定位 多提议分布 Cubature卡尔曼滤波 扩展卡尔曼滤波 Kullback-Leibler距离采样 机器人操作系统
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WEIGHTED INTEGRALS OF HOLOMORPHIC FUNCTIONS 被引量:1
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作者 HuZhangjian LiuTaishun 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 2004年第4期474-480,共7页
Given an admissible weight w and 0<p<∞, the estimate∫ D|f(z)| pw(z)dm(z)~|f(0)| p+∫ D|f′(z)| p ψ p(z)w(z)dm(z)is valid for all holomorphic functions f in the unit disc D. Here,ψ(r)=∫ 1 rw(t)dtw(r... Given an admissible weight w and 0<p<∞, the estimate∫ D|f(z)| pw(z)dm(z)~|f(0)| p+∫ D|f′(z)| p ψ p(z)w(z)dm(z)is valid for all holomorphic functions f in the unit disc D. Here,ψ(r)=∫ 1 rw(t)dtw(r) is the distortion of w. As an application of the above estimate, it is proved that the Cesàro operator C[·] is bounded on the weighted Bergman spaces L p a,w (D). 展开更多
关键词 admissible weight holomorphic functions cesàro operator.
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