网络语言中的语言变异研究

语言变异是一种普遍存在的社会语言现象。网络语言在使用者的喜好习惯等因素的影响下出现了简洁、新奇、不稳定等特点。主要反映在语音方面的变异包括谐音和缩略等几种形式。要正确对待网络语音。     

英语写作中的变换与交际目的再认识

大学生的习作在句子结构、句子类型及篇章组织上都存在一定的问题。解决这一问题的关键在于培养学生在英语写作中运用富于变化的结构形式的能力和扎实的词汇基础,安排好文章的篇章组织,即通过谴词、造句和篇章的变换,以充分实现文章的交际目的与变化性的统一。     

中国入境旅游业对危机事件响应的区域差异研究

危机事件给入境旅游业带来负面影响,准确分析各种危机事件对我国不同区域的影响差异具有现实意义。通过时间序列法和变异系数进行分析,结果表明,在区域灾害高发期或者灾害发生年,特定时段入境旅游流占区域全年比例往往低于同期全国相应水平,对生命安全造成威胁、引起交通中断的灾害对区域入境旅游流影响较严重。我国东部地区入境旅游业对危机事件反应较为缓和,抗御危机事件能力较强且恢复速度快;西北部干旱地区以及西藏、海南入境旅游业对危机事件反应较为敏感,抗御危机事件能力较弱且恢复速度慢。北京、上海入境旅游业一直走在全国前列,但是易受危机事件干扰。政治与疾病事件对入境旅游业与国内旅游业均造成严重打击,同时多种危机事件叠加也会对入境旅游业造成较大影响,与国内旅游业相比入境旅游业对危机事件反应更为敏感。     

Active-set sequential quadratic programming method with compact neighbourhood algorithm for the multi-polygon mass production cutting-stock problem with rotatable polygons

The cutting-stock problem, which considers how to arrange the component profiles on the material without overlaps, can increase the utility rate of the sheet stock, and is thus a standard constrained optimisation problem. In some applications the components should be placed with specific orientations, but in others the components may be placed with any orientation. This study presents an overlap index and it is much more suitable for the active-set SQP method which can reduce the time spend for constraint consideration. Using this method, various object orientations can be considered easily and the number of object on the sheet stock can be improved by up to eight percent.     

A NOTE ON SAMPLING WITH AND WITHOUT REPLACEMENT

Upper bounds are given for the total variation distance between the distribution statistics of random samples with and without replacement from a finite set.     

Estimation of variances in orthogonal finite discrete spectrum linear regression models

The Invariant Quadratic Estimators, the Maximum Likelihood Estimator (MLE) and Restricted Maximum Likelihood Estimator (REML) of variances in an orthogonal Finite Discrete Spectrum Linear Regression Model (FDSLRM) are derived and the problems of unbiasedness and consistency of these estimators are investigated.Acknowledgement. The research was supported by the grants 1/0272/03, 1/0264/03 and 2/4026/04 of the Slovak Scientific Grant Agency VEGA.     

Romania’s accession to the EU: Short-term welfare effects on food consumers

This paper focuses on estimation of the welfare effects on different Romanian households of assumed food price changes as a result of EU accession. Using the Slutsky compensating variation approach, results suggest that these changes affect welfare differently for various categories of households. Although on average the welfare loss is 2.6%, a higher impact is estimated for low-income groups. However, the relatively high share of home-produced consumption of food diminishes these impacts, in particular for rural households, and somewhat smaller monetary amounts would be required if compensation is paid.     

关于金融控股公司微观层面的文献综述

国际上,许多学者对金融机构集团化进行了理论或实证研究。在研究过程中,由于角度各异,研究的方向各有侧重。即便是方向一致,也经常因为研究方法的不同而结论迥异。本文将这些文献分为"经营绩效"分析、成本(规模经济/范围经济/X效率)评估、"生产效率"的测度、经营风险和管理以及金融控股公司(FHC)整合前后的价值变化等五个主要领域,力图在每一领域中展示比较有代表性文献的研究结论并进行简短评论。     

语言变异的社会心理成因分析

语言变异是社会语言学研究的语言现象之一.对此,国内外许多专家学者分别从语音、词汇、语法层面、社会文化因素等多方面进行过研究.从社会心理语言学的角度来看,追新求异心理、从众心理、避俗求雅心理、男女性别差异心理导致了语言变异.     

中国城市经济增长与环境质量变化关系的实证研究

随着经济的迅速发展,城市环境问题已成为诸多学者的研究热点。为此,建立经济增长与环境质量变化的二次函数模型;选择关键环境要素指标,对中国39个城市的经济增长与环境质量变化关系进行了实证检验。实证结果发现:除氮氧化物浓度外,其余污染物与收入确实存在倒"U"型曲线现象,说明在未来可预测的年份里,随着中国城市经济增长,氮氧化物将成为城市污染最严重的问题;除氮氧化物浓度外,中国城市其余污染物的倒"U"曲线转折点具有自己的特点。因此,因地制宜地制定城市环境保护政策是慰平中国城市环境兹涅茨曲线的有效办法。