中国西部城镇化发展的"三分"构想

在经济全球一体化和经济区域化已成为当今世界经济发展大势的背景下,西部区域经济之所以发展不利,根本原因是区域经济理论陈旧落后,缺乏创新的区域发展思维。这些深层次的问题得不到解决,西部的城镇化水平和区域经济难以得到快速发展。因此,“三分构想”的提出是十分必要和迫切的。     

古代汉语教材词类划分分歧现象探讨

高校古代汉语语法教学由于词类划分体系不一 ,在代词副词的归属 ,助词的取舍 ,量词是否设置等问题的处理上存在较大的分歧 ,这就给高校尤其是师范类院校的教学带来不便。文章具体分析并探讨了近二十年来古汉语教材在词类划分上的分歧现象及产生的原因 ,进而提出代词、副词虚实的确立 ,助词、量词的设置不仅符合先秦文献的实际语言情况 ,而且可与中学文言文教学衔接 ,因而必须在高校教材中加以体现     

利用单词超团的二分图文本聚类算法

鉴于目前传统文本聚类方法中利用文档间的相似度进行聚类存在的问题,在传统的文本挖掘基础上提出了一种新的文本聚类算法——利用单词超团的二分图文本聚类算法。该算法用文档中单词的关联模式来评估文档间的相似度及主题类别预测,并利用图划分策略来大大降低文档相似度比较算法的复杂度,同时将超团作为特征结构的扩展,可以在一定范围内减少语言信息的丢失,提高聚类效果。经实验证明该算法具有较高的有效性。     

P(n,3)的三种类型的分拆公式及其应用

本文得出P(n,3)的三种类型的分析公式,附上一份公式表,使关于P(n,3)的计算更系统化,便于检索.指出这些公式在θ图、烷系和双环烷系等计算上的应用.新公式比原有公式全面、简洁和便于计算。     

通用考试系统的设计与实现

通用考试系统为考试的无纸化提供了一套完整的解决方案。并且提供了包括数据库生成、试题图文编辑、试卷组织及模拟分析、试题随机生成、学生考试终端程序、网上在线监考程序、成绩管理及统计等功能；介绍了用Visual C++开发的该系统的性能特点，讨论了其中的一些关键实现技术。     

Localizing Combinatorial Properties for Partitions on Block Graphs

We extend the study on partition properties from the set partition to the graph partition, especially for the class of connected block graphs which includes trees. We introduce seventeen partition properties and determine their inter-relations. The notions of k-consistency and k-sortability were studied in the set partition to localize the properties, i.e., a global property can be verified through checking local conditions. We carry on these studies for partitions on connected block graphs. In particular, we completely determine the consistency for all the seventeen properties.     

Partition of a query set into minimal number of subsets having consecutive retrieval property

This paper is concerned with information retrieval. The basic problem is how to store large masses of data in such a way that whenever information regarding some particular aspect of the data is needed, such information is easily and efficiently retrieved. Work in this field is thus very important for organizations dealing with large classes of data.The consecutive retrieval (C-R) property defined by S.P. Ghosh is an important relation between a set of queries and a set of records. Its existence enables the design of information retrieval system with a minimal search time and no redundant storage in that the records can be organized in such a way that those pertinent to any query are stored in consecutive storage locations. The C-R property, however, can not exist between every arbitrary query set and every record set.A subset of the query set Q having the C-R property is called a C-R subset and a C-R subset having the maximum cardinality is called the maximal C-R subset. A partition of Q is called the C-R partition if every subset has the C-R property. A C-R partition with minimum number of subsets is called the minimal C-R partition. With respect to the set of all binary queries and the set of all binary records, it is shown that the maximal cardinality of a C-R subset is 2l-1 where l is the number of attributes concerned. A combinatorial characterization of a maximal C-R subset is also given. A lower bound on the number of subsets in a C-R partition and several examples which attain the lower bound are given. A general procedure for obtaining a minimal C-R partition which attains the lower bound is given provided the number of attributes is even.     

On random grouping in goodness of fit tests of discrete distributions

We consider the problem of random grouping of data from discrete distributions to form χ² goodness of fit tests. In general the random partitions need not converge to the partition one gets using the true distribution function and the same partitioning scheme. We present a method of guaranteeing the convergence of the random partition and yielding the usual χ² asymptotics.     

A Note on a Partition of the Likelihood Ratio Test for Autoregressive Covariance Structure

A sequence of nested hypotheses is presented for the examination of the assumption of autoregressive covariance structure in, for example, a repeated measures experiment. These hypotheses arise naturally by specifying the joint density of the underlying vector random variable as a product of conditional densities and the density of a subset of the vector random variable. The tests for all but one of the nested hypotheses are well known procedures, namely analysis of variance F-tests and Bartlett's test of equality of variances. While the procedure is based on tests of hypotheses, it may be viewed as an exploratory tool which can lead to model identification. An example is presented to illustrate the method.     

Developing countries and systemic pension reforms: Reflections on some emerging problems

Since 1981 close to forty countries have introduced systemic pension reforms that have replaced all or part of prior pay‐as‐you‐go (PAYG) schemes with privately managed funded defined contribution (FDC) pillars or systems. However, over the past decade about half of these countries have subsequently cutback on, or entirely eliminated, these FDC schemes. In this article we explore some of the reasons why this reversal is often taking place in developing countries. As part of our analysis we propose a new pension reform typology that goes beyond the commonly used dichotomy between PAYG and pension privatization. We identify and discuss four factors that are of particular relevance to those seeking to understand the pension policy reversals that have been taking place in many developing countries: low pension coverage and incentive incompatibility, triple burden costs, tradeoffs between pension reforms and social pensions, and difficulties with annuitization.