欧元区统一货币政策绩效及其对中国的启示

欧元产生以来,欧洲中央银行在统一货币政策的框架下较好的实现了物价稳定的首要任务,却未能有效促进欧元区的经济增长、充分就业和国际收支平衡,主要原因在于:成员国经济基本面的差异使统一货币政策产生了巴拉萨-萨缪尔森效应。由此给当前正致力于货币合作的东亚地区带来了一个重要启示:应不断加强各国间的政策协调,确保主要经济指标高度趋同,为将来单一货币的实行奠定重要基础。     

构建铁路客站治安防控体系刍议

本文在对当前铁路客站治安防控现状进行分析的基础上，提出了加强“五大能力、六大机制”建设这一构建科学、高效的客站治安防控体系的架构支撑，实现由事后处置为主向超前防范为主、由重治标向重治本的转变，是从更深层次和领域研究解决火车站地区治安问题的一次探索。     

The effect of CEOs on firm performance

The extent to which CEOs influence firm performance is fundamental to scholarly understanding of how organizations work; yet, this linkage is poorly understood. Previous empirical efforts to examine the link between CEOs and firm performance using variance decomposition, while provocative, nevertheless suffer from methodological problems that systematically understate the relative impact of CEOs on firm performance compared to industry and firm effects. This study addresses these methodological problems and reexamines the percentage of the variance in firm performance explained by heterogeneity in CEOs. The results of this study suggest that in certain settings the ‘CEO effect’ on corporate‐parent performance is substantially more important than that of industry and firm effects, but only moderately more important than industry and firm effects on business‐segment performance. Copyright © 2008 John Wiley & Sons, Ltd.     

安徽省45家上市公司经营业绩评析

上市公司是我国经济运行中最具发展优势的群体,上市公司的健康发展是夯实资本市场基础、促进资本市场健康稳定发展的根本.文章采用因子分析法,通过建立多元化因子模型,利用案例样本(安徽省45家上市公司)的相关财务数据对样本公司的经营业绩进行实证分析,并依据分析结果对样本公司经营业绩进行综合评价.     

关于建立环境污染健康保障基金的构想

现代社会在发展经济的同时也在以前所未有的速度破坏着人类赖以生存的环境,环境破坏又反过来影响人类的生存和发展,于是环境与健康成为了人们关注的焦点。环境污染危害了人类健康,建立与此相适应的健康保障基金,可以缓解社会矛盾,解决受害人群在日常生活与看病就医时资金不足与短缺问题,有利于和谐社会的共建。     

Mobile technology usage and B2B market performance under mandatory adoption

This paper investigates the relationship between mandatory adoption of mobile information technology and market performance in the business-to-business (B2B) setting. This study presents and tests the B2B technology satisfaction model (TSM), including perceived loss of control as the mandatory technology acceptance-specific variable. The results of this study reveal that integrating perceived loss of control with user satisfaction and the TAM (technology acceptance model) in a single model can better explain the B2B market performance model. The empirical results suggest that perceived loss of control has a negative effect on user satisfaction and perceived market performance is influenced by user satisfaction and perceived usefulness. Managerial implications of the study are discussed.     

The Qualitative and Quantitative Models for Performance Measurement Systems: The Agile Service Development

A decision model for selection using analytic hierarchy process (AHP), however, they did not consider interdependence property but consider independence property among alternatives or criteria. It could become inadequate in measurement of actual performance of the decision process. In order to reduce the decision gap, this paper considers when independence among different elements of a system assumption is violated and takes into account the degree of the interdependence among them. The fuzzy analytic network process (FANP) approach with agile theory is developed to apply in analyzing the new service development in the wholesale center. The FANP could not only offer a hierarchy framework more efficiency and accuracy but also improve human judgment on the importance of requirements involving imprecise and vague. The technique has proved useful for comparing the importance among the determinants of agile for new service development in decision maker’s mind, including agile cost, time, robustness and scope. The empirical result points out that “Diverse designs” of new service development is the best choice for the wholesale center, following as “Service extended” and “Technological core”.     

基于身份保护的高效3GPPAKA协议

针对3GPP AKA协议中存在的安全缺陷,在消息中加入访问网络的身份信息,利用秘密令牌机制,提出了一种可以防止重定向攻击、SQN同步缺陷和用户身份信息泄露的改进方案,并对其安全性和效率进行了分析。分析表明,本方案可以有效解决上述问题,以较少的资源开销就能获取协议效率和安全性能的提高。     

PAGES AS STAGES: A Performance Approach to Visitor Books

This article offers a contribution to the fields of tourist performance and language. By exploring a visitor book located at a heritage site in Jerusalem, Israel, it argues that texts produced by tourists can assume the semiotic status of performances. Consequently, tourists’ texts should not be viewed merely as instances of “discourse” or “language”, but also as organic parts of the aesthetic and semiotic aspects of tourism. The article describes four dimensions that establish the visitor book as a particular “stage”, and the texts therein as the tourists’ situated performances. Taken together, these dimensions constitute a model for the analysis of linguistic performance and for the semiotic interrelationship between stage and performance in tourism.     

低信噪比环境下短扩频码捕获性能的改善

介绍了低信噪比环境下基于FFT的扩频码捕获技术,提出了在相同累加段数情况下提高性能的方案。作为提高相干增益的两种方式,相干累加和非相干累加各有优缺点,在一定的数据长度内合理地设计累加方式对提高捕获性能大有帮助。基于两种累加方式的性能介绍了一种两路非相干积分的累加方式。对于GPS信号,在低信噪比的环境下的仿真证明,在一定长度下优化后的累加方式相比非相干累加和普通混合累加方式能够得到更好的捕获效果(更高的检测概率)。