基于权值优化的认知WiMax信号协同识别

传统的正交频分复用（OFDM）系统识别算法只能识别出接收信号是否为基于全球微波互联接入技术（WiMax）的OFDM信号,但无法判断该信号是认知信号,并且在复杂电磁环境下识别正确率低。为此,提出了一种协同识别认知WiMax无线网络OFDM信号的算法。该算法首先利用OFDM信号的循环自相关特性估计信号的有用符号时间,并通过估计各协同感知节点的信噪比对时间参数的估计值进行加权,得到有用符号时间的协同估计值,进而判断接收信号是否为基于WiMax系统的OFDM信号;再通过自私攻击策略,实现对OFDM信号是否是认知WiMax信号的判别,为进一步研究认知WiMax网络节点定位技术奠定了基础。仿真结果表明,与非协同识别算法相比,提出的协同识别算法在多径和低信噪比条件下具有更高的识别率。     

认知无线Ad Hoc网络单跳传输容量的研究

研究了认知无线电Ad Hoc网络的单跳传输能力,该网络与主用户网络工作在同一地理区 域和共享同一频谱。主用户网络具有更高的优先级访问认知用户网络频谱,认知网络需要控 制其发射机密度以限制对主用户干扰。认知、主用户节点位置假设服从泊松点分布,推导了 认知、主用户网络单跳传输容量,最后进行了仿真验证其正确性。仿真结果表明：主用户网 络传输容量随主用户中断概率增加而增加,随增量中断概率的增加而降低。认知用户网络传 输容量仅由次用户中断概率参数决定。     

Emotions and dissonance in ‘ethical’ consumption choices

Abstract

This paper investigates the role of emotions and the prevalence of dissonant/incongruent choice behaviour within the context of ethical consumption. Based on 31 in-depth interviews with British consumers, the findings demonstrate that consumers consciously indulge in ‘ethical’ and ‘unethical’ behaviour (as defined by respondents themselves), often within short time frames, and that they often compensate for unethical choices by making ethical choices later on (and vice versa). The study provides evidence that positive and negative emotions are a key driver of this dissonant behaviour. Guilt is the most salient emotion, and a taxonomy of guilt in this context is derived from the data. Consumers are found to employ guilt-management strategies in order to sustain contradictory behaviour and manage cognitive dissonance. A conceptual framework is derived in order to summarise the observed role of emotions in ethical consumer choice. The paper also provides additional explanations of the manifestation of the attitude–behaviour gap.     

An Investigation into the Meaning of the Term Commitment in Sino Foreign Higher Educational Alliances—An Adventure into the Heart and Soul of Successful Alliances

Abstract

There is now a substantial body of research evaluating various aspects of educational alliances between Chinese and foreign universities, and one of the key aspects of success seems to be the degree of commitment made by the two sides. Yet the term commitment continues to remain elusive and very broad in scope. This paper attempts to identify what commitment meant to managers from a number of Chinese and foreign university alliances and concludes that it was a complex and deeply felt sentiment encompassing affective and cognitive aspects related to the personal and operational dimensions of an alliance over time. Commitment-in its various forms and guiseslay at the very core of a successful alliance. It enabled people-and their respective institutions-to devote considerable levels of emotional and cognitive energy to the alliance: it was about passion, and results; about enthusiasm and value; and about empathy and measurable quality.     

Do customer participation and cognitive ability influence satisfaction?

Under some circumstances, increased customer participation can enhance customer satisfaction. However, the precise mechanism by which participation might increase satisfaction has not been explored in the literature. This paper considers whether a customer’s cognitive ability might affect the relationship between participation and satisfaction. A causal model has been developed to examine the potential interactive effects of participation and cognitive ability on satisfaction, and a simple quantitative model has been proposed to simulate these effects. The results of both a numerical simulation analysis and a quantitative analysis of case study data indicate a significant main effect of cognitive ability on satisfaction. Additionally, an interactive effect has been observed, whereby higher cognitive ability results in higher satisfaction, given a minimum degree of customer participation in the service. Among this study’s implications is that customers with different cognitive abilities should have different degrees of participation that act to maximize their satisfaction.     

The impact of affective and cognitive antecedents on negative word-of-mouth intentions

Negative word-of-mouth (WOM), defined as derogatory information disseminated from person to person and aimed at defaming a product, highlighting a product complaint, and/or highlighting unsatisfactory service experiences, influences consumer behavior and can harm a company’s image. The present study was conducted to ascertain the impact of affective antecedents (negative emotions) and cognitive antecedents (distrust) in the intent of negative WOM. A proposed theoretical model was employed to analyze the effect that perceived injustice had on negative WOM and how this effect was mediated by emotional and cognitive aspects. The research was a pre-experimental design – one treatment leading to one observation – with 252 students. Through an OLS regression and mediation analyses, we found an indirect link between perceived injustice and negative WOM intent, which was mediated by negative emotions and distrust. Contributing to the field of marketing studies, this paper fills an investigative gap regarding affective and cognitive antecedents as mediators of negative WOM. The results suggest that marketing managers should create mechanisms to allow consumers to express their negative emotions and rebuild their trust in order to avoid the spread of negative WOM.     

资产减值与会计盈余可比性

本文探讨了资产减值与会计盈余可比性的关系,发现会计盈余受资产减值的影响越大,其与同行业其他企业的可比性就越差。进一步的分析显示,资产减值所涉及的稳健性原则和盈余管理行为是导致企业间会计信息不可比的主要原因所在。这表明,企业会根据各自的报告动机以不同的标准执行同一资产减值准则,仅仅依靠会计准则的趋同难以完全达到会计信息的可比性目标。 IASB若以全球会计信息可比为目标,则应谨慎拓展资产减值会计。     

大学生对互联网金融的认知和使用调查分析——以温州市高校为例

本文以温州市高校大学生为调查对象,通过设计问卷,统计分析了他们对互联网金融的认知和使用情况,得出了大学生对互联网金融的认知有待深入、互联网金融产品的使用范围较窄等结论。     

认知网中感知时间和功率控制的联合优化机制

针对认知无线网中为了最大化认知用户的吞吐量问题,提出了一种感知时间和功率控制的联合优化机制。该机制保证认知系统在低于一定干扰限制下,将认知用户吞吐量描述成为一个多约束优化问题,从理论上分析了最优功率分配方案与最优感知时间分配方案。根据理论分析结果,设计了联合迭代机制通过确定合适的感知参数从而达到最大化认知用户吞吐量的目的。仿真结果表明：提出的联合优化机制复杂度较低,并且该方案的认知吞吐量性能最接近理论最优方案的性能。     

频控阵特征及应用前景综述

频控阵是近年来提出的一种新体制阵列技术。与传统相控阵不同的是,频控阵通过在不同通道附加很小的频偏,使其波束图在远场成为随位置、角度和时间变化的函数。频控阵这种新波束的特征产生许多新的功能,具有很多独特的应用优势和广阔的发展应用前景。首先介绍了频控阵发展历程和基本原理,然后分析了频控阵技术实现难点,最后指出了频控阵可能的应用和发展方向。