β级α型Bazilevi?函数的对数系数

利用从属关系给出|(g(z)/f(z))~α|的估计.运用构造一个非负函数和对复变函数模的积分进行估计的方法,对β级α型Bazilevi函数类Bα(β)的对数系数bn进行研究.所得结果推广了一些作者的相关结果.     

Bazilevic函数的对数系数

本文研究了Bazilevic函数类B_α(C,D)的对数系数.利用构造一个非负函数和对复变函数模的积分进行估计的方法,获得了B_α(C,D)的对数系数,推广了一些已有的相关结果.     

分数年龄生存函数的估计

本文主要讨论了生存函数的插值问题,使用了非节点端点的三次样条插值和α-power插值两种方法对生存函数进行了插值,并与传统的三种插值假设：死亡均匀分布假设、常数死亡力假设、Balducci假设做了比较.另外,我们对α-power插值中的α进行了拟合,并通过误差分析表明先对α拟合后再进行α-power插值,其插值的误差将会变得非常小,几乎与样条插值相仿.     

关于Bloch函数的性质

研究了Bloch函数族B中的两个子族Bα与B0,给出了它们的函数之间的关系;作为应用建立了Bα与B0中函数的偏差定理,从而刻画了Bα与B0中函数的有关性质.     

整函数与其差分算子的唯一性定理

本文证明了:如果有限级非常数整函数f和它的差分算子△_η~nfCM分担小函数α,且0为f的亏值,那么(△__η~nf-α)/(f-α)≡c,其中c为非零常数.同时,还研究了整函数f和它的差分算子△_ηf,△_η~fCM分担小函数α的唯一性问题.     

与超几何函数相关的几类解析函数族的性质

设A表示在单位圆盘D={z:|z|1}内解析的函数构成的集合,s~*(α)表示所有α阶星型函数之集,R_α表示所有α(0≤α≤1)阶预星象函数之集,R(α,β)表示A中所有满足条件f(0)=f′(0)-1=0并且f*z/((1-z)~2(1-α))∈S~*(β)的函数f所构成的集合.该文讨论了函数族R(α,β)之间的包含关系以及函数族R_α的卷积性质.     

有关P叶α级预星象函数的一类解析函数的性质

引进一类P叶解析函数Qp(λ,α),证明类中函数的准确实部不等式,对Qp(λ,α)上的凸组合函数作了数量估计.由此推出文[3]中函数类的两个新结果.     

两族解析函数的极值问题

定义了一族解析函数A(σ,α,β,μ)和拓广的Robertson函数族G(α,β,μ),讨论两族解析函数的极值问题,首先利用算子理论和借助一种变分法得到A(σ,α,β,μ)上F^rechet可导泛函所对应的极值函数.利用一阶微分从属证明,关于子类中函数的准确实部不等式,同时推出G(α,β,μ)的相应结果.     

某一类解析函数的性质和特征

本文研究了在单位圆内的解析函数类M_n(α,β).利用解析函数的性质和不等式技巧进行讨论,得到了这类函数的包含关系、系数估计等性质以及这类函数的一个充分条件.     

一些单叶函数族导数的积分平均值

K(α),st_k(α),C(β,α),(α<1,β<1)分别表示α阶凸函数族,k 次对称的α阶星形函数族,α型β阶的近于凸函数族.在这篇文章中,我们分別对(?)(K(α)的闭凸包),(?),(?),(α<1,β≤1/2)决定了凸泛函L(f)=(1/(2π)(?)))~(1/p),0≤r<1,p≥1,n=1,2,…,的极值和极值函数.我们的结果表明:极值函数仅依赖于函数族而与参数 n,r,p 无关;而且对任何固定的函数族,除掉旋转外极值函数是唯一的.     

Relativization of dynamical properties

In the past twenty years,great achievements have been made by many researchers in the studies of chaotic behavior and local entropy theory of dynamical systems.Most of the results have been generalized to the relative case in the sense of a given factor map.In this survey we offer an overview of these developments.     

A properly discontinuous free group of affine transformations

In this paper we prove that a fully irreducible outer automorphism relative to a non-exceptional free factor system acts loxodromically on the relative free factor complex as defined in Handel and Mosher (Relative free splitting and relative free factor complexes I: hyperbolicity, 2014. arXiv:1407.3508v1). We also prove a north-south dynamic result for the action of such outer automorphisms on the closure of relative outer space.     

Central limit theorem and sample complexity of stationary stochastic programs

In this paper we discuss sample complexity of solving stationary stochastic programs by the Sample Average Approximation (SAA) method. We investigate this in the framework of Optimal Control (in discrete time) setting. In particular we derive a Central Limit Theorem type asymptotics for the optimal values of the SAA problems. The main conclusion is that the sample size, required to attain a given relative error of the SAA solution, is not sensitive to the discount factor, even if the discount factor is very close to one. We consider the risk neutral and risk averse settings. The presented numerical experiments confirm the theoretical analysis.     

Relative Entropy, Asymptotic Pairs and Chaos

In this paper, we prove that positive conditional entropy impliesthe existence of asymptotic pairs and scrambled sets on fibers.Moreover, we introduce the notion of conditional topologicalentropy for a subset using Bowen's definition of separated andspanning sets, and prove that the conditional topological entropyof a system relative to a factor is the supremum of conditionaltopological entropy of its scrambled sets on fibers.     

保险公司离散型崩溃模型研究

本文提出并讨论了含投资因素、红利分配因素的崩溃模型，得出了关于崩溃概率、保险公司的期望寿命的结论，这些结论推广了没有考虑投资因素的崩溃模型的相关结论．     

Blockwise acceleration of alternating least squares for canonical tensor decomposition

The canonical polyadic (CP) decomposition of tensors is one of the most important tensor decompositions. While the well-known alternating least squares (ALS) algorithm is often considered the workhorse algorithm for computing the CP decomposition, it is known to suffer from slow convergence in many cases and various algorithms have been proposed to accelerate it. In this article, we propose a new accelerated ALS algorithm that accelerates ALS in a blockwise manner using a simple momentum-based extrapolation technique and a random perturbation technique. Specifically, our algorithm updates one factor matrix (i.e., block) at a time, as in ALS, with each update consisting of a minimization step that directly reduces the reconstruction error, an extrapolation step that moves the factor matrix along the previous update direction, and a random perturbation step for breaking convergence bottlenecks. Our extrapolation strategy takes a simpler form than the state-of-the-art extrapolation strategies and is easier to implement. Our algorithm has negligible computational overheads relative to ALS and is simple to apply. Empirically, our proposed algorithm shows strong performance as compared to the state-of-the-art acceleration techniques on both simulated and real tensors.     

Quasi-factors and relative entropy for infinite-measure-preserving transformations

We extend the definition of quasi-factors for infinite-measure-preserving transformations. The existence of a system with zero Krengel entropy and a quasi-factor with positive entropy is obtained. On the other hand, relative zero-entropy for conservative systems implies relative zero-entropy of any quasi-factor with respect to its natural projection onto the factor. This extends (and is based upon) results of Glasner, Thouvenot and Weiss [6, 7]. Following and extending Glasner and Weiss [8], we also prove that any conservative measure-preserving system with positive entropy in the sense of Danilenko and Rudolph [3] admits any probability-preserving system with positive entropy as a factor. Some applications and connections with Poisson-suspensions are presented.     

基于灵敏性分析的Q-MSGSID的优化及应用

本文针对绝对关联度、综合关联度以及相对关联度的取值范围存在的不足,首先,设置了控制因子λ以及空间中的距离d,以此来调节关联度值的范围,建立了新模型。其次,研究了它的一些性质,并在理论上证明了新模型满足灰色关联公理。另外,提出了新模型的准优值所满足的几个原则,并结合灵敏性分析原理给出了准优值的算法步骤。最后,通过实例研究,验证了新模型所得结果不但能够使关联度的值扩充到(0,1]这一更大的范围,而且提高了区分度和分辨效果。     

保险公司在固定利率下的离散型破产概率

本提出并讨论了在固有利率下含投资因素、红利分配因素的两种离散型破产模型，分别得出了相应模型下关于保险公司的破产概率、期望寿命的结论，推广散没有考虑利率因素的离散型破产模型的有关结论。     

Asymptotics of relative heat traces and determinants on open surfaces of finite area

The goal of this article is to prove that on surfaces with asymptotically cusp ends the relative determinant of pairs of Laplace operators is well defined. We consider a surface with cusps $(M,g)$ and a metric $h$ on the surface that is a conformal transformation of the initial metric $g$ . We prove the existence of the relative determinant of the pair $(\Delta _{h},\Delta _{g})$ under suitable conditions on the conformal factor. The core of the paper is the proof of the existence of an asymptotic expansion of the relative heat trace for small times. We find the decay of the conformal factor at infinity for which this asymptotic expansion exists and the relative determinant is defined. Following the paper by B. Osgood, R. Phillips, and P. Sarnak about extremal of determinants on compact surfaces, we prove Polyakov’s formula for the relative determinant and discuss the extremal problem inside a conformal class. We discuss necessary conditions for the existence of a maximizer.