第四代移动通信（4G）的技术分析与发展前景

文章介绍了第四代移动通信的概念,主要应用的技术以及4G的发展前景.     

Goodness-of-fit tests for a heavy tailed distribution

We study the Kolmogorov–Smirnov test, Berk–Jones test, score test and their integrated versions in the context of testing the goodness-of-fit of a heavy tailed distribution function. A comparison of these tests is conducted via Bahadur efficiency and simulations.     

G函数引导的新探索

作为对经济理论和理论核心的综合和深化,G函数引导出了一些新的探索。其中主要有初始模型的选取,试验焦点的确定,以及实验领域的搜索等。出于对经济理论核心的精确化需要,超越对数函数成为初始结构模型的可选择形式,由此导致数据试验的焦点内容集中。若其他条件不变,作为边界条件,固定数量向量会成为实验的基本出发点,在其中所进行的搜索会日益成为实际验证所关注的内容。     

Estimating conditional tail expectation with actuarial applications in view

We develop statistical inferential tools for estimating and comparing conditional tail expectation (CTE) functions, which are of considerable interest in actuarial science. In particular, we construct estimators for the CTE functions, develop the necessary asymptotic theory for the estimators, and then use the theory for constructing confidence intervals and bands for the functions. Both parametric and non-parametric approaches are explored. Simulation studies illustrate the performance of estimators in various situations. Results are obtained under minimal assumptions, and the general Vervaat process plays a crucial role in achieving these goals.     

A lower-bound oracle inequality for a blockwise-shrinkage estimate

Efromovich-Pinsker and Stein blockwise-shrinkage estimates are traditionally studied via upper-bound oracle inequalities, which bound the estimate's risk from above by the oracle's risk plus a remainder term. These bounds allow one to establish sufficient conditions for attaining the oracle's risk. To explore necessary conditions, this article develops a lower-bound oracle inequality, which bounds the estimate's risk from below by the oracle's risk minus a remainder term. In particular, the lower bound implies that thresholds must vanish for attaining the oracle's risk.     

Bayesian mixture modeling for spatial Poisson process intensities,with applications to extreme value analysis

We propose a method for the analysis of a spatial point pattern, which is assumed to arise as a set of observations from a spatial nonhomogeneous Poisson process. The spatial point pattern is observed in a bounded region, which, for most applications, is taken to be a rectangle in the space where the process is defined. The method is based on modeling a density function, defined on this bounded region, that is directly related with the intensity function of the Poisson process. We develop a flexible nonparametric mixture model for this density using a bivariate Beta distribution for the mixture kernel and a Dirichlet process prior for the mixing distribution. Using posterior simulation methods, we obtain full inference for the intensity function and any other functional of the process that might be of interest. We discuss applications to problems where inference for clustering in the spatial point pattern is of interest. Moreover, we consider applications of the methodology to extreme value analysis problems. We illustrate the modeling approach with three previously published data sets. Two of the data sets are from forestry and consist of locations of trees. The third data set consists of extremes from the Dow Jones index over a period of 1303 days.     

和谐社会主义与查韦斯的“21世纪新社会主义”

苏东剧变后，以中国为代表的社会主义国家坚持探索符合本国国情的社会主义发展道路，南美洲国家寻求以社会主义替代资本主义，从而形成世界社会主义的两大亮点。建设社会主义和谐社会的理论与查韦斯的“21世纪新社会主义”理论是其中最活跃且影响最广泛的理论创造与社会实践活动。本文通过对两者之间关系的论述，进一步探讨在经济与文化落后国家建设社会主义模式的多样化及其共同特征，进而提出和谐社会主义是各种模式社会主义的共同目标与更高阶段。     

On characterizations of the logistic distribution

We modify and extend George and Mudholkar's [1981. A characterization of the logistic distribution by a sample median. Ann. Inst. Statist. Math. 33, 125–129] characterization result about the logistic distribution, which is in terms of the sample median and Laplace distribution. Moreover, we give some new characterization results in terms of the smallest order statistics and the exponential distribution.     

REPATRIATION OF DEBT IN THE EURO CRISIS

With the beginning of the Euro Crisis, the long‐standing trend of European financial integration reversed. Investors unwound cross‐border positions of debt obligations and increased holdings of locally issued debt. In other words, debt obligations were repatriated. We use data on bank portfolios to document three new empirical regularities of the financial disintegration: (i) repatriation affected mainly debt of crisis countries; (ii) repatriation affected mainly public debt; (iii) the public debt of crisis countries that was not repatriated was reallocated to large and politically influential countries within the Euro area. We read these results in light of standard theories of cross‐border portfolio allocation and argue that the sum of these patterns constitutes evidence for the secondary market theory of public debt.     

政府部门间G2G信息资源共享的演化博弈分析

简要介绍了电子政务的发展和演化博弈理论,将政府部门置于一个不断渐进地演化系统中,根据演化博弈系统构建出演化博弈模型和演化相位图,探究及分析政府部门所拥有的信息资源、信息资源共享的收益系数、政府部门的风险系数和信息资源共享中的技术成本等相关参数对政府部门之间的信息资源共享所产生的影响,并据此提出一些有针对性的建议,为提升跨政府部门之间信息资源共享能力和电子政府信息服务能力提供科学的理论支持。