利用随机共振解调微弱MFSK信号

采用随机共振解调微弱MFSK信号解决了传统解调方法误码率高的问题。 根据大噪声环境下信号能借助噪声能量发生随机共振这一理论,先将微弱MFSK信号通过双稳 态随机共振系统以提高其信噪比,对随机共振系统的输出信号用FFT来区分每段信号的载波 频率,最后依据判决准则解调MFSK信号。当信噪比较高时,可向信号中人为添加白噪 声来使之适用于该解调方法。MATLAB仿真结果表明,该方法能成功解调信噪比最低为 -23 dB的2FSK信号和-25 dB的8FSK信号,而这是传统相干解调方法所无法达到的。     

从华为收购美国公司失败看企业如何控制经营风险

在全球经济一体化逐步形成的背景下,中国企业海外并购步伐加快,但从实践看,成功案例少,失败案例多。究其原因,虽然并购失败因素复杂,但企业并购前对交易风险分析与评估不足是关键环节。从风险控制、风险识别、风险评估等各环节分析,企业可将风险评估结果与企业事先确定的风险管理策略进行对比,建立风险预警机制,对达到风险预警线的风险发出预警信号,并分别采取风险规避、风险转移、风险减轻、风险承受等应对措施控制经营风险。     

Resource acquisition strategies in business relationships

Integrating the IMP Group approach with aspects of the resource-based view of the firm, we seek to develop and test a typology of relationship strategies based on different resource acquisition foci. For this purpose, we conducted interviews with thirty CEOs and other senior marketing managers in the UK and the USA. In-depth content analysis identified five main resource acquisition strategies (RAS) behind building business relationships: money bonds, new market bonds, utilization bonds, intellectual bonds, and credibility bonds. We further carried out a quantitative study with 658 senior managers in the USA to test for the generalizability of our findings. Results of a one-way repeated ANOVA and multinomial logistic regression analysis show significant differences between the five RAS for business relationships. However, a pair-wise comparison provides evidence for the existence of hybrid strategies. In addition, an investigation of the association between the RAS of business relationships on the one hand, and business strategy on the other, revealed equifinality of alternative business strategies vis-à-vis the applied relationship strategy. Finally, our analysis revealed no significant differences between the distributions of RAS types for knowledge intensive versus non-knowledge intensive business services. However, we found that RAS distribution is significantly associated with company size.     

Stock Returns,Productivity, and Corruption in Eight European Fast-Emerging Markets

This article addresses the impact of productivity, corruption, and trade openness on the stock returns of 265 industrial companies listed in eight Eastern European fast-emerging markets, over the 2004-2013 period. Through a three-factor model that includes both measures at firm level and macro-level control variables, our findings suggest that country corruption index is negatively correlated with the total annual return of the stocks of the listed industrial companies of our sample. Moreover, the most productive firms are featured by higher stock returns, while leverage seems not to be a key predictor of stock returns. In addition, the article uncovers innovative evidence about trade openness that is negatively correlated with stock returns due to its connection with the recent financial crisis. That is, firms operating in markets that are more open to trade show a higher degree of interconnection with other economies and are more likely to undergo the effects of negative fluctuations from foreign markets during the economic crisis. © 2015 Wiley Periodicals, Inc.     

Guanxi,political connections and resource acquisition in Chinese publicly listed private sector firms

In this study, we examined the role of guanxi as entrepreneurs’ resource-obtaining mechanism in private sector firms, using a data-set of 184 publicly listed firms in China. We found that guanxi indeed played a positive role that helped private sector firms gain easier access to resources. We also found that guanxi exerted even a greater positive effect on private sector firms’ resource obtaining compared to entrepreneurs’ political participation, due to being the lifeblood of business conduct and social interaction in Chinese culture.     

学习型组织之魂——团队学习

研究通过对相关文献的梳理,对建立学习型组织中最关键的团队学习的概念和特征进行了梳理。强调了团队学习必须从团队层面进行分析,不能将其与团队环境中的个人学习混为一谈。指出了团队学习的关键在于知识的获取、分享、存储和检索,并对四个环节及其相互关系进行了探讨。     

母语迁移对二语习得的作用与影响

在第二语言的学习过程中,母语知识与目标语的习得有着诸多关联。本文通过分析母语正迁移作用对二语习得的积极影响与负迁移作用对二语习得的消极影响,指出正确对待母语迁移作用的重要性。     

A good deal online: The Impacts of acquisition and transaction value on E-satisfaction and E-loyalty

Relying on Thaler's exchange theory, this research examines the unique effects of perceived transaction and acquisition values on consumer e-satisfaction and e-loyalty in an e-commerce setting, along with the moderating role of product/ service category. Overall, consumers' perceptions of transaction value lead to their e-dissatisfaction. Hence, obtaining a good deal does not have the same meaning and influence depending on the type of buying trip (exploratory or goal-directed). These results confirm Thaler's exchange theory's usefulness to analyzing the impact of perceived value on e-satisfaction and e-loyalty. Additionally, in a managerial perspective, this research underlines the importance of adapting promotional strategies to online contexts, since online purchase experience improves when there is an alignment between the customer's goals and the e-tailer’s online offering.     

网络嵌入影响企业创新绩效的概念模型与实证分析

本文有效整合社会网络、知识获取和创新绩效三个方面的理论研究,以知识获取为中间变量,构建网络嵌入影响企业创新绩效的概念模型,探究关系型嵌入和结构型嵌入影响企业外部知识获取并进而影响创新绩效的微观机理,并通过长三角地区270家本土企业的问卷调查与结构方程模型分析,结果发现:企业通过对组织网络的关系型嵌入和结构型嵌入能够有效提高外部知识的获取效应,从而对企业的创新绩效存在显著的推动作用。在此基础上,本研究试图为本土企业如何通过网络嵌入提高知识获取能力以及创新绩效提供理论指导和对策建议。     

我国房地产上市公司并购绩效问题及对策探究

本文针对房地产上市公司并购中出现的问题,结合当前的经济政策分别从政府角度、行业角度、房地产上市公司自身角度提出相应的对策。