90年代乡土背景中篇小说叙事技艺——以《匪风》、《民谣》、《老旦是一棵树》为例

90年代某些乡土小说并非文学史意义上的乡土小说,又不同于先锋小说,乡土背景仅成为文本叙述的虚拟背景,表达作者对社会人生的认知感悟和审美体验,通常采用解构的主题、反讽的意味、戏谑性的颠覆等叙事技艺,以清新新奇的叙事方式,显示出作家异乎寻常的艺术想象力和别具一格的艺术内视阈。     

基于蚁群算法的成本敏感线性集成多分类器的客户流失研究

针对电信客户流失预测问题的复杂性,融合自组织神经网络良好的连续属性值离散化优势、粗糙集理论出色的属性约简功能和蚁群优化算法全局的随机搜索特点,在模型集成技术和成本敏感学习理论的基础上,提出了一种新的基于蚁群算法的成本敏感线性集成多分类器的电信客户流失预测模型。构建该集成模型可分为4个阶段:(1)连续属性值的离散处理:利用自组织神经网络对连续属性值进行非监督离散化处理;(2)原始属性集的约简处理:使用粗糙集理论按属性重要性原则对离散属性进行约简;(3)子分类器的建立:分别使用NaiveBayes、Logistic回归、多层感知器和决策树等4种差异性很大的分类技术在约简属性集上建立4个对应的客户流失预测子分类器;(4)子分类器的集成:基于成本敏感学习理论,构建了4种不同的线性集成模型,采用蚁群优化算法求解集成模型的最优线性组合权重系数。将该模型应用于某电信客户流失预测,其实验结果表明该集成方法是可行且有效的。     

Ranking sets additively in decisional contexts: an axiomatic characterization

Ranking finite subsets of a given set X of elements is the formal object of analysis in this article. This problem has found a wide range of economic interpretations in the literature. The focus of the article is on the family of rankings that are additively representable. Existing characterizations are too complex and hard to grasp in decisional contexts. Furthermore, Fishburn (1996), Journal of Mathematical Psychology 40, 64–77 showed that the number of sufficient and necessary conditions that are needed to characterize such a family has no upper bound as the cardinality of X increases. In turn, this article proposes a way to overcome these difficulties and allows for the characterization of a meaningful (sub)family of additively representable rankings of sets by means of a few simple axioms. Pattanaik and Xu’s (1990), Recherches Economiques de Louvain 56, 383–390) characterization of the cardinality-based rule will be derived from our main result, and other new rules that stem from our general proposal are discussed and characterized in even simpler terms. In particular, we analyze restricted-cardinality based rules, where the set of “focal” elements is not given ex-ante; but brought out by the axioms.      

论劳工标准与世界贸易

社会条款问题一直是发达与发展中国家在世贸组织内争议的焦点之一。美国等发达国家屡次提出要在世贸组织协议中写进"社会条款",以实现其通过贸易制裁来强制推行"核心劳工标准"的目的。中国应尽早采取各种对策并根据相关的国际公约要求,尽快完善现行劳动立法,以维护国家和民族利益。     

影响少儿武术套路集体基本功项目比赛的问题探讨

通过对2002年四川省"金武童"武术套路比赛集体基本功项目比赛的扣分和相关问题的分析,对我国儿童武术套路集体项目比赛中的主要问题进行理论探讨与研究。     

国家投资体制改革与项目可行性研究问题探析

国家投资体制改革后,项目投资的风险由国家转移到投资者自身,做好建设项目的可行性研究工作,具有十分重要的意义.但项目审批制取消后在投资领域暴露出一些新问题,某些企业忽视项目可行性研究,甚至不经可行性研究就盲目决策重大建设项目.应从以下几方面做好项目可行性研究:重视对可行性研究报告编制单位的选择,保证可行性研究报告的编制质量;在对投资项目进行可行性研究的同时要加强对项目不可行性研究的分析论证;在项目可行性研究报告中加大风险预测力度;重视建设项目对生态环境影响的研究,做好安全评价预测工作,实现人与自然和谐发展.     

An algorithm for optimal difference systems of sets

Difference Systems of Sets (DSS) are combinatorial structures that generalize cyclic difference sets and are used in code synchronization. A DSS is optimal if the associated code has minimum redundancy for the given block length n, alphabet size q, and error-correcting capacity ρ. An algorithm for finding optimal DSS is presented together with tables of optimal solutions found by this algorithm. Dedicated to Professor Frank K. Hwang on the occasion of his 65th birthday. Research supported by NSF Grant CCR-0310632.     

Exploring the consequences of a recalibration of causal conditions when assessing sufficiency with fuzzy set QCA

The use of Charles Ragin’s Qualitative Comparative Analysis (QCA) is increasing in the social sciences. However, some of its characteristics, especially those of its fuzzy set variant, are still not well understood by users. QCA, a set theoretic method, aims to describe, in a Boolean form, the configurations of conditions that are necessary and/or sufficient for some outcome. The calibration of set memberships is a central feature. We discuss how two alternative calibrations of a condition affect the assessment of consistency with sufficiency. Using first an abstract example and then an empirical one from the sociology of education, we explain why “stricter” calibration of conditions results in higher consistency with sufficiency. We demonstrate that conventional truth table analysis is not an ideal way to compare the analytic consequences of alternative calibrations and therefore employ an alternative which allows a more direct comparison of consistency indices while keeping comparative configurational contexts intact.     

灰色信息系统中的优势粗糙集模型

文章将一种新的优势关系引入到区间集灰色信息系统中,定义了对象灰度与对象确定度、整体灰度与整体确定度等概念,建立了基于优势关系的粗糙集模型,由此得出一系列相关性质与定理,最后用一实例进行了说明。     

美国赠送西藏当局无线电台事件与美英两国对于西藏地位的分歧

抗日战争后期,围绕赠送西藏当局无线电台事件,美国国务院和军方情报部门发生争执;同时,美国政府与英国政府在西藏地位问题上出现意见分歧,美国政府对于西藏是中国的一部分的认识更加明确。本文主要依据美英两国的档案、文件,参考中文资料,以第二次世界大战为背景,对于上述事件进行介绍与分析。