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Almost sure central limit theory for products of sums of partial sums 被引量:6
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作者 WU Qun-ying 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 2012年第2期169-180,共12页
Consider a sequence of i.i.d.positive random variables.An universal result in almost sure limit theorem for products of sums of partial sums is established.We will show that the almost sure limit theorem holds under a... Consider a sequence of i.i.d.positive random variables.An universal result in almost sure limit theorem for products of sums of partial sums is established.We will show that the almost sure limit theorem holds under a fairly general condition on the weight dk= k-1 exp(lnβk),0≤β〈1.And in a sense,our results have reached the optimal form. 展开更多
关键词 almost sure central limit theorem WEIGHT product of sums of partial sums.
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ON THE LIMITING BEHAVIOR OF THE MAXIMUM PARTIAL SUMS FOR ARRAYS OF ROWWISE NA RANDOM VARIABLES 被引量:3
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作者 甘师信 陈平炎 《Acta Mathematica Scientia》 SCIE CSCD 2007年第2期283-290,共8页
Let {Xni, 1 ≤ n,i 〈 ∞} be an an array of rowwise NA random variables and {an, n ≥ 1} a sequence of constants with 0 〈 an ↑∞ . The limiting behavior of maximum partial sums 1/an max 1≤k≤n|^k∑i=1 Xni| is inv... Let {Xni, 1 ≤ n,i 〈 ∞} be an an array of rowwise NA random variables and {an, n ≥ 1} a sequence of constants with 0 〈 an ↑∞ . The limiting behavior of maximum partial sums 1/an max 1≤k≤n|^k∑i=1 Xni| is investigated and some new results are obtained. The results extend and improve the corresponding theorems of rowwise independent random variable arrays by Hu and Taylor [1] and Hu and Chang [2]. 展开更多
关键词 NA random variable maximum partial sum complete convergence convergence in probability
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SELF-NORMALIZED CENTRAL LIMIT THEOREM AND ESTIMATION OF VARIANCE OF PARTIAL SUMS FOR NEGATIVE DEPENDENT RANDOM VARIABLES 被引量:1
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作者 Zhang Lixin\ Shi StrongwayDept.of Math.,Zhejiang Univ.,Xixi Campus,Hangzhou 310028,China. 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 2002年第3期326-334,共9页
Let {X n,n≥1} be a stationary LNQD or NA sequence satisfying EX 1=μ,EX 2 1<∞ and (Var S n)/n→σ 2 as n→∞.In this paper a class of self-normalized central limit theorems and estimators of Var S n are ... Let {X n,n≥1} be a stationary LNQD or NA sequence satisfying EX 1=μ,EX 2 1<∞ and (Var S n)/n→σ 2 as n→∞.In this paper a class of self-normalized central limit theorems and estimators of Var S n are studied.The weak and strong consistency of the estimators of Var S n are presented. 展开更多
关键词 estimation negative dependence CONSISTENCY variance of partial sums.
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On Moments of the Maximum of Normed Partial Sums of ρ^--mixing Random Variables 被引量:1
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作者 谭成 吴群英 何燕梅 《Chinese Quarterly Journal of Mathematics》 CSCD 2011年第4期499-504,共6页
In this paper, we obtain the moment conditions for the supermun of normed sums of ρ^--mixing random variables by using the Rosenthal-type inequality for Maximum partial sums of ρ^--mixing random variables. The resul... In this paper, we obtain the moment conditions for the supermun of normed sums of ρ^--mixing random variables by using the Rosenthal-type inequality for Maximum partial sums of ρ^--mixing random variables. The result obtained generalize the results of Chen(2008) and extend those to negatively associated sequences and ρ^--mixing random variables. 展开更多
关键词 moments of supermun of normed partial sums ρ^--mixing random variables ρ^--mixing random variables negatively associated random variables
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On the Limiting Behavior of Weighted Partial Sums for B Valued Martingale Difference Sequences
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作者 Gan Shi-xin 1, Qiu De-hua 2 1.School of Mathematics and Statistics, Wuhan University, Wuhan 430072, Hubei, China 2. Department of Mathematics, Hengyang Teacher’s College, Hengyang 421008, Hunan, China 《Wuhan University Journal of Natural Sciences》 CAS 2002年第2期133-136,共4页
Let {Xn, n≥1} be a martingale difference sequence and {a nk , 1?k?n,n?1} an array of constant real numbers. The limiting behavior of weighted partial sums ∑ k=1 n a nk X k is investigated and some new results are ob... Let {Xn, n≥1} be a martingale difference sequence and {a nk , 1?k?n,n?1} an array of constant real numbers. The limiting behavior of weighted partial sums ∑ k=1 n a nk X k is investigated and some new results are obtained. 展开更多
关键词 p-smoothable Banach space weighted partial sum martingale difference sequence strong law of large numbers
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Complete Convergence for Partial Sums of the Squares of ARCH Sequence
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作者 ZHANG Zhi-qiang ZHANG Ri-quan FENG Jing-yan 《Chinese Quarterly Journal of Mathematics》 CSCD 2010年第4期601-606,共6页
In this paper,we discuss the suffcient condition for complete convergence of partial sums of squares of the ARCH sequence,at the same time a moment inequality of maximum partial sums for squares of the ARCH sequence i... In this paper,we discuss the suffcient condition for complete convergence of partial sums of squares of the ARCH sequence,at the same time a moment inequality of maximum partial sums for squares of the ARCH sequence is proved. 展开更多
关键词 ARCH partial sums complete convergence
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Moments of the maximum of normed partial sums of ρ^--mixing random variables
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作者 LIU Xiang-dong LIU Jin-xia 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 2009年第3期355-360,共6页
Let {Xn,n ≥ 1} be a sequence of identically distributed ρ^--mixing random variables and set Sn =∑i^n=1 Xi,n ≥ 1,the suffcient and necessary conditions for the existence of moments of supn≥1 |Sn/n^1/r|^p(0 〈 r... Let {Xn,n ≥ 1} be a sequence of identically distributed ρ^--mixing random variables and set Sn =∑i^n=1 Xi,n ≥ 1,the suffcient and necessary conditions for the existence of moments of supn≥1 |Sn/n^1/r|^p(0 〈 r 〈 2,p 〉 0) are given,which are the same as that in the independent case. 展开更多
关键词 moment of supremum of normed partial sum ρ^--mixing random variable
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ON UNIFORM APPROXIMATION BY PARTIAL SUMS OF JACOBI SERIES ON ELLIPTIC REGION
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作者 Zhang Peixuan Shandong University, China. 《Analysis in Theory and Applications》 1994年第1期47-57,共11页
In this paper, we discuss the relation between the partial sums of Jacobi serier on an elliptic region and the corresponding partial sums of Fourier series. From this we derive a precise approximation formula by the p... In this paper, we discuss the relation between the partial sums of Jacobi serier on an elliptic region and the corresponding partial sums of Fourier series. From this we derive a precise approximation formula by the partial sums of Jacobi series on an elliptic region. 展开更多
关键词 MATH ON UNIFORM APPROXIMATION BY partial sums of JACOBI SERIES ON ELLIPTIC REGION Zn APPI
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A Note on the Almost Sure Central Limit Theorem for Partial Sums of ρ^(−)-Mixing Sequences
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作者 Feng Xu Qunying Wu 《Applied Mathematics》 2015年第9期1574-1580,共7页
Let be a strictly stationary sequence of ρ?-mixing random variables. We proved the almost sure central limit theorem, containing the general weight sequences, for the partial sums , where , . The result generalizes a... Let be a strictly stationary sequence of ρ?-mixing random variables. We proved the almost sure central limit theorem, containing the general weight sequences, for the partial sums , where , . The result generalizes and improves the previous results. 展开更多
关键词 ρ^(−)-Mixing Sequences partial sums Almost Sure Central Limit Theorem
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Performance and Complexity Trade-Off between Short-Length Regular and Irregular LDPC
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作者 Ziyuan Peng Ruizhe Yang 《Journal of Computer and Communications》 2024年第9期208-215,共8页
In this paper, both the high-complexity near-ML list decoding and the low-complexity belief propagation decoding are tested for some well-known regular and irregular LDPC codes. The complexity and performance trade-of... In this paper, both the high-complexity near-ML list decoding and the low-complexity belief propagation decoding are tested for some well-known regular and irregular LDPC codes. The complexity and performance trade-off is shown clearly and demonstrated with the paradigm of hybrid decoding. For regular LDPC code, the SNR-threshold performance and error-floor performance could be improved to the optimal level of ML decoding if the decoding complexity is progressively increased, usually corresponding to the near-ML decoding with progressively increased size of list. For irregular LDPC code, the SNR-threshold performance and error-floor performance could only be improved to a bottle-neck even with unlimited decoding complexity. However, with the technique of CRC-aided hybrid decoding, the ML performance could be greatly improved and approached with reasonable complexity thanks to the improved code-weight distribution from the concatenation of CRC and irregular LDPC code. Finally, CRC-aided 5GNR-LDPC code is evaluated and the capacity-approaching capability is shown. 展开更多
关键词 Regular LDPC Irregular LDPC Near-ML Decoding List Decoding Belief Propagation Algorithm Sum-product Algorithm CRC-Aided Hybrid Decoding
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POSITIVITY AND BOUNDEDNESS OF TRIGONOMETRIC SUMS
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作者 Gavin Brown 《Analysis in Theory and Applications》 2007年第4期380-388,共9页
We give a systematic account of results which assure positivity and boundedness of partial sums of cosine or sine series. New proofs of recent results are sketched.
关键词 partial sum cosine series sine series orthogonal polynomials
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A Precise Asymptotic Behaviour of the Large Deviation Probabilities for Weighted Sums
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作者 Gooty Divanji Kokkada Vidyalaxmi 《Applied Mathematics》 2011年第9期1175-1181,共7页
Let {Xn, n ≥ 1} be a sequence of independent and identically distributed positive valued random variables with a common distribution function F. When F belongs to the domain of partial attraction of a semi stable law... Let {Xn, n ≥ 1} be a sequence of independent and identically distributed positive valued random variables with a common distribution function F. When F belongs to the domain of partial attraction of a semi stable law with index α, 0 < α < 1, an asymptotic behavior of the large deviation probabilities with respect to properly normalized weighted sums have been studied and in support of this we obtained Chover’s form of law of iterated logarithm. 展开更多
关键词 Large DEVIATIONS LAW of ITERATED LOGARITHM Semi-Stable LAW Domain of partial ATTRACTION Weighted sums
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Parallel Computation of Disjoint Products Approach
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作者 刘景森 李捷 《Chinese Quarterly Journal of Mathematics》 CSCD 2002年第3期41-48,共8页
In this paper, extracting parallelizatio n from the sum of disjoint products approach is discussed. A general framework of parallelizing disjoint products approach is presented. And a parallel version of the newest... In this paper, extracting parallelizatio n from the sum of disjoint products approach is discussed. A general framework of parallelizing disjoint products approach is presented. And a parallel version of the newest disjoint products algorithm is implemented. The results of testing s how the effect is so good to get linear speedups. 展开更多
关键词 sum of disjoint products PARALLELIZATION relia bility evaluation
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Joint asymptotic distribution of exceedances point process and partial sum of stationary Gaussian sequence 被引量:3
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作者 TAN Zhong-quan PENG Zuo-xiang 《Applied Mathematics(A Journal of Chinese Universities)》 SCIE CSCD 2011年第3期319-326,共8页
Let {Xi}i=1^∞ be a standardized stationary Gaussian sequence with covariance function τ(n) =EX1Xn+1, Sn =∑i=1^nXi,and X^-n=Sn/n.And let Nn be the point process formed by the exceedances of random level (x/√2 l... Let {Xi}i=1^∞ be a standardized stationary Gaussian sequence with covariance function τ(n) =EX1Xn+1, Sn =∑i=1^nXi,and X^-n=Sn/n.And let Nn be the point process formed by the exceedances of random level (x/√2 log n+√2 log n-log(4π log n)/2√log n) √1-τ(n) + X^-n by X1,X2,…, Xn. Under some mild conditions, Nn and Sn are asymptotically independent, and Nn converges weakly to a Poisson process on (0,1]. 展开更多
关键词 stationary Gaussian sequence exceedances point process partial sum.
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Generalized Series of Bernoulli Type
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作者 Thomas Beatty Nicholas Bianco Nicole Legge 《Advances in Pure Mathematics》 2023年第9期537-542,共6页
The problem of evaluating an infinite series whose successive terms are reciprocal squares of the natural numbers was posed without a solution being offered in the middle of the seventeenth century. In the modern era,... The problem of evaluating an infinite series whose successive terms are reciprocal squares of the natural numbers was posed without a solution being offered in the middle of the seventeenth century. In the modern era, it is part of the theory of the Riemann zeta-function, specifically ζ (2). Jakob Bernoulli attempted to solve it by considering other more tractable series which were superficially similar and which he hoped could be algebraically manipulated to yield a solution to the difficult series. This approach was eventually unsuccessful, however, Bernoulli did produce an early monograph on summation of series. It remained for Bernoulli’s student and countryman Leonhard Euler to ultimately determine the sum to be . We characterize a class of series based on generalizing Bernoulli’s original work by adding two additional parameters to the summations. We also develop a recursion formula that allows summation of any member of the class. 展开更多
关键词 BERNOULLI SERIES CONVERGENCE SUM Recursion Formula ZETA-FUNCTION SINE Maclaurin Series Infinite product
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Rearrangement Inequality and Chebyshev's Sum Inequality on Positive Tensor Products of Orlicz Sequence Space with Banach Lattice 被引量:1
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作者 Wei-Kai Lai 《Journal of Mathematics and System Science》 2014年第8期574-578,共5页
Let φ be an Orlicz function that has a complementary function φ* and let lφ be an Orlicz sequence space. We prove a similar version of Rearrangement Inequality and Chebyshev's Sum Inequality in lφ FX, the Freml... Let φ be an Orlicz function that has a complementary function φ* and let lφ be an Orlicz sequence space. We prove a similar version of Rearrangement Inequality and Chebyshev's Sum Inequality in lφ FX, the Fremlin projective tensor product of lφ with a Banach lattice X, and in lφ iX, the Wittstock injective tensor product of lφ with a Banach lattice X. 展开更多
关键词 Rearrangement inequality Chebyshev's sum inequality injective tensor product projective tensor product Orlicz sequence space
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On the Product of Integro Differential Equations and Their Solutions in Direct Sum Spaces
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作者 Sobhy El-sayed Ibrahim 《Journal of Mathematics and System Science》 2013年第5期231-245,共15页
In this paper, we consider a general quasi-differential expressions t1,t2 Tn, each of order n with complex coefficients and their formal adjoints are t1+,t2+- x+ on [0, b) respectively. We show in the direct sum s... In this paper, we consider a general quasi-differential expressions t1,t2 Tn, each of order n with complex coefficients and their formal adjoints are t1+,t2+- x+ on [0, b) respectively. We show in the direct sum spaces LZ(Ip), p = 1,2 N of functions defined on each of the separate intervals with the case of one singular end-points and under suitable conditions on the function F that all solutions of the product quasi-integro differential equations are bounded and LZw -bounded on [0,b). 展开更多
关键词 Quasi-integro differential equation product differential expressions direct sum spaces bounded and square integrablesolutions.
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On the Convergence of Observed Partial Likelihood under Incomplete Data with Two Class Possibilities
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作者 Tomoyuki Sugimoto 《Open Journal of Statistics》 2014年第2期118-136,共19页
In this paper, we discuss the theoretical validity of the observed partial likelihood (OPL) constructed in a Coxtype model under incomplete data with two class possibilities, such as missing binary covariates, a cure-... In this paper, we discuss the theoretical validity of the observed partial likelihood (OPL) constructed in a Coxtype model under incomplete data with two class possibilities, such as missing binary covariates, a cure-mixture model or doubly censored data. A main result is establishing the asymptotic convergence of the OPL. To reach this result, as it is difficult to apply some standard tools in the survival analysis, we develop tools for weak convergence based on partial-sum processes. The result of the asymptotic convergence shown here indicates that a suitable order of the number of Monte Carlo trials is less than the square of the sample size. In addition, using numerical examples, we investigate how the asymptotic properties discussed here behave in a finite sample. 展开更多
关键词 Cox’s Regression MODEL Logistic Regression MODEL INCOMPLETE Binary Data partial LIKELIHOOD partial-Sum Processes Profile LIKELIHOOD
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基于低密度校验码的OFDM编码调制译码算法 被引量:6
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作者 徐志江 李式巨 官军 《电路与系统学报》 CSCD 2004年第1期13-16,40,共5页
低密度校验码(LDPC)具有编码增益高、译码速度快、性能接近Shannon限的优点。LDPC码应用于OFDM,能有效地提高多径环境下OFDM的BER性能。本文首先简单介绍LDPC码及其概率域上的译码算法,在此基础上对译码算法作融合,阐述概率似然比的译... 低密度校验码(LDPC)具有编码增益高、译码速度快、性能接近Shannon限的优点。LDPC码应用于OFDM,能有效地提高多径环境下OFDM的BER性能。本文首先简单介绍LDPC码及其概率域上的译码算法,在此基础上对译码算法作融合,阐述概率似然比的译码算法。为了把LDPC应用于OFDM系统上,提出了多电平调制下的LDPC译码的算法。仿真结果表明,在AWGN和Rayleigh信道下,此算法正确有效。 展开更多
关键词 低密度校验码 正交频分复用 编码调制 和积算法
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OFDM系统中基于因子图的信道估计算法 被引量:2
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作者 郭艳华 郭心悦 徐伯庆 《计算机工程》 CAS CSCD 2013年第3期72-76,共5页
为提高正交频分复用(OFDM)系统的信道估计精度,根据频谱资源的无线信道特性,提出基于因子图的OFDM系统信道估计算法,包括二维联合信道估计算法和2个级联的一维信道估计算法。将时变频率选择性衰落信道建模为一阶自回归模型,使信道参数... 为提高正交频分复用(OFDM)系统的信道估计精度,根据频谱资源的无线信道特性,提出基于因子图的OFDM系统信道估计算法,包括二维联合信道估计算法和2个级联的一维信道估计算法。将时变频率选择性衰落信道建模为一阶自回归模型,使信道参数之间的交互信息近似为高斯分布,利用和积算法实现OFDM系统的联合信道估计和符号检测。仿真结果表明,该信道估计算法能够以较低的计算复杂度逼近最优的估计性能。 展开更多
关键词 正交频分复用 信道估计 符号检测 因子图 和积算法
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