美国社区银行发展及对我国的启示

"社区银行"这一概念在国内银行业方兴未艾。理论界普遍认为应当引人社区银行发展模式,作为改革中小金融机构,解决中小企业融资难问题的途径。美国社区银行经过100多年的发展,其治理和运作模式己较为成熟。介绍美国社区银行的发展轨迹,分析美国社区银行长盛不衰的原因,为国内引入这一经营模式提供借鉴。     

On the multivariate spatial median for clustered data

The authors consider the multivariate one-sample location problem with clustered data from a nonparametric viewpoint. They propose the spatial median and its affine equivariant version as companion estimators to the affine invariant sign test of Larocque (2003). They extend the asymptotics of the proposed estimators to cluster dependent data and explore the limiting as well as finite-sample efficiencies for multivariate Student distributions. They demonstrate that the efficiency of the spatial median suffers less from intracluster correlation than the mean vector. They use data on the well-being of pupils in Finnish schools to illustrate their work.     

Securing Passenger Aircraft from the Threat of Man‐Portable Air Defense Systems (MANPADS)

In this article, we develop a model for the expected maximum hit probability of an attack on a commercial aircraft using MANPADS, as a function of the (random) location of the attacker. We also explore the sensitivity of the expected maximum hit probability to the parameters of the model, including both attacker parameters (such as weapon characteristics) and defender parameters (such as the size of the secure region around the airport). We conclude that having a large secure region around an airport offers some protection against MANPADS, and that installing onboard countermeasures reduces the success probability of a MANPADS attack.     

数字地图辅助的三星时差定位方法及误差分析

针对应用三星组成卫星簇对地面辐射源定位的问题,提出了利用数字地图辅助以及使用WGS-84坐标系作为精确定位的模型,在此基础上提出了对地面辐射源目标进行定位的迭代格式的定位算法,并且利用模拟三维地形图进行了定位结果仿真;推导了定位方法的理论误差表达式,研究表明定位仿真结果与误差理论分析一致,并可降低由目标高程假设带来的定位误差。     

缺失偏态数据下联合位置与尺度模型的统计推断

为了研究缺失偏态数据下的联合位置与尺度模型,基于分布自身的特点,提出了一种适合缺失偏态数据下联合建模的插补方法———修正随机回归插补方法,该方法对缺失数据下模型偏度参数的调整十分显著。通过随机模拟和实例研究,并与回归插补和随机回归插补方法进行比较,结果表明,所提出的修正随机回归插补方法是有用和有效的。     

The inverse 1-maxian problem with edge length modification

We consider the problem of modifying the lengths of the edges of a graph at minimum cost such that a prespecified vertex becomes a 1-maxian with respect to the new edge lengths. The inverse 1-maxian problem with edge length modification is shown to be strongly -hard and remains weakly -hard even on series-parallel graphs. Moreover, a transformation of the inverse 1-maxian problem with edge length modification on a tree to a minimum cost circulation problem is given which solves the original problem in . This research has been supported by the Austrian Science Fund (FWF) Project P18918-N18.     

1945-1947年中国城市学生运动区位研究

1945-1947年,国民党统治区爆发了三次大规模的学生运动,分别形成以昆明、北平、南京为中心城市的三个学生斗争的集中区域。三大区域的形成,既体现了近代中国社会发展不平衡的一般规律,也表现出不同区域的各自特点,显示了不同的政治力量在不同时期、不同地区产生的不同影响。考察影响战后中国城市学生运动的区位因素及内在联系,将三次学生运动高潮和三大斗争区域做历史的比较,对于认识中国共产党在不同时期和环境下,如何制定科学的方针和实施有效的斗争策略,具有积极的意义。     

National Governance Quotient: The Foundation of Big Data-based National Governance

A nation’s rise or fall hinges, to some extent, upon its national governance quotient. National governance quotient, or NGQ, is a quantitative indicator measuring the governance level of a country in quotient form. Its value is the ratio of the national governance system and capacity to national governance costs, and its nature is that of an amalgam of national governance ideas and techniques quantified on the basis of the figures. It is advanced because its inner core lies in logic and computation, and it is scientific because it is guaranteed by technology platforms such as big data and cloud computing. The formulation of NGQ provides technical support and a basis for the transformation from experiential or experimental governance to quantitative, scientific governance, and it thus has great theoretical and practical significance for the modernization of national governance system and capacity. As well as being used to provide quantitative management of national governance modernization, NGQ can also be used as a measurement standard and key symbol for evaluating the modernization of China’s national governance by 2020. Furthermore, it can be used to compile a World NGQ Report with the aim of taking hold of international governance discourse, as well as to compile China local NGQ reports to improve local governance in China.     

论人文主义教育理念下的教师角色定位

在人文主义教育理念的框架内,教师角色应从两方面进行定位:教师的职业角色和教师的非职业角色。教师角色的正确定位,是教师专业化和教师教育改革的前提。     

Partitioning Pearson's Chi-Squared Statistic for a Completely Ordered Three-Way Contingency Table

The paper presents a partition of the Pearson chi-squared statistic for triply ordered three-way contingency tables. The partition invokes orthogonal polynomials and identifies three-way association terms as well as each combination of two-way associations. This partition provides information about the structure of each variable by identifying important bivariate and trivariate associations in terms of location (linear), dispersion (quadratic) and higher order components. The significance of each term in the partition, and each association within each term can also be determined.
The paper compares the chi-squared partition with the log-linear models of Agresti (1994) for multi-way contingency tables with ordinal categories, by generalizing the model proposed by Haberman (1974).