准正交空时分组码系统的一种盲信道估计方法

空时分组码(STBC)系统的经典信道盲估计方法,如子空间法(SS)等,都是基于接收端样本自相关矩阵的特征值分解(EVD)或奇异值分解(SVD)来实现信道估计的,而基于QR分解的信道盲估计方法是一种性能优良的新算法.文中将该算法应用到准正交空时分组码系统的信道估计中,结合准正交空时分组码的特性提出了一种新的信道盲估计算法.与以上经典的信道盲估计算法相比,文中提出的算法的计算量大为降低.同时Monte-Carlo仿真表明,当信噪比较低时,该算法比子空间法有更好的性能.     

The joint effect of consumer and service providers’ culture on online service evaluations: A response surface analysis

National culture exerts substantial influence on consumers' expectations, satisfaction, and evaluations. Despite that, within a service-based context, two cultures are met, that of the customer and that of the service provider, the existing literature systematically explores the effect of customer culture in isolation neglecting the impact of the provider's culture or their joint effect. We fill this gap by considering the concomitant effect of customer and provider cultural factors on passenger evaluations of airline carriers using a large dataset of reviews that covers the majority of countries. Employing a response surface methodology, our study provides significant advantages over methods based on cultural distance scores in revealing more complex non-linear relationships. This multi-dimensional approach provides new insights for assessing the impact of national culture on customers' service perceptions and evaluations, thus bringing significant implications for researchers and service providers.     

Organizational remembering as a trigger for cultural change: Exploring the episodic memories of a financial scandal

Organizational memory research has developed from the 'storage bin' model of memory towards emphasizing collective remembering. We advance this view by proposing organizational remembering not just as the process of evoking past events to reproduce traditions but also as a projection into the future using imagination. Empirically this is illustrated through the qualitative analysis of 27 episodic interviews with employees of a global financial institution, documents and the media coverage of the organization’s involvement in two well-publicized financial scandals. We explore the impact of the episodic memories of those events on employees' readiness for the cultural change programme launched by management after the scandals. The analysis shows how the negative media coverage of the organization generated a powerful dis-confirmation of its working practices among employees and how this was amplified by the strong emotional reactions remembering those events provoked. Management used both to re-frame the past in a narrative used to increase receptiveness to change. Yet the past was brought differently into the present by different organizational groups depending on the future each group imagined, counteracting the impact of the generic management narrative. The findings illustrate the collective, emotional and imaginative qualities of organizational remembering and provide new insights into the process of cultural change through the lens of memory showing how while memories may be shaped by management to respond to crisis, they can also become part of prospective and transformative change processes.     

基于"双螺旋"的企业创新文化基因模型构建

在全球技术差距不断收敛的情境下，仅依靠创新要素的物理堆集难以取得成功。在创新文化催化下，让创新要素迸发出最大活力并重新组合，有助于突破障碍、提升创新绩效。借助生物学的基因双螺旋结构，构建企业创新文化基因模型，分析其演化机理。其中，企业战略和知识管理构成双链，创新价值观是决定基因，制度创新是助力基因，自主创新是动力基因，创新成果是能力基因；最后，在此基础上提出模型应用思路。     

Unleash the Pandora's Box: Political Turmoil and Malaria Outbreak During China's Cultural Revolution

This paper examines whether the health system disruption during the Cultural Revolution was the major factor that triggered the malaria outbreak in the early 1970s. The trend of public health expenditure shows that the health system was disrupted from 1968 to 1970. The regression results demonstrate that provinces which experienced a more severe shock to the health system had larger increases in malaria incidence in the early 1970s. The malaria outbreak is found to have negative effects on public health, implying that the health consequence of disease control disruption was not eliminated by the improvement of medical care in rural China.     

Configuring innovative societies: The crossvergent role of cultural and institutional varieties

The study aims to explore why some societies are more innovative than others in high-technology sectors. Following a crossvergence perspective, we generate nine causal conditions by accommodating both cultural and institutional varieties: uncertainty avoidance, masculinity, individualism and power distance as culture indicators, and union density, skill development, market capitalization to credit, prevalence of cluster and state dominance as institutional indicators. Applying the configurational approach, we conducted fuzzy-set qualitative comparative analysis (fsQCA) on Organization for Economic Co-operation and Development (OECD) member countries. We confirm the equal importance of both cultural and institutional mechanisms as contributors to national innovativeness, and identify equifinal configurations of cultural and institutional varieties as leading to a high-tech society. The implication is that a society can adjust or develop various cultural and/or institutional conditions to maintain or create leadership in innovation.     

Farmers’ perception of their decision-making in relation to policy schemes: A comparison of case studies from Switzerland and the United States

Farmers are decision-makers in a complex system of cause and effect. They decide with respect to their own attitude and beliefs, according to their farm structure and they take into account programs and regulations of the overarching policy scheme. In this paper we used mail surveys with identical questions to establish a cross-national comparison of two case study areas. The questionnaire investigates farmer's perspectives on what influences their own decision-making as well as their perception of the socio-ecological environment to relate these findings to the respective policy schemes in the case study areas. The two case studies are located in Southern Illinois, United States and in central Switzerland. The analysis shows that full-time farmers of the Southern Illinois case study area rate constraining factors such as financial aspects higher than Southern Illinois part-time farmers and farmers from the central Switzerland case study area. Furthermore, it is apparent that Swiss case study-farmers rate aspects of their land use responsibility and the Illinois case study-farmers rate ecological aspects higher. The empirical findings can be qualitatively explained through analysis of agricultural policy schemes.     

‘What’s on your Bucket List?’: Tourism,identity and imperative experiential discourse

The concept of the Bucket List has achieved rapid and widespread recognition. This article makes an original Critical Discourse Analysis of the Bucket List as a cultural phenomenon that provides important insights into the interrelation between identity and tourism. The Bucket List is used to communicate specific suggestions of desirable tourism experiences and uses what can be termed the experiential imperative discourse, where the language, tone and framing of the text positions the experience described as essential and obligatory. Ultimately, the Bucket List discourse serves to prescribe culturally specific ideas of what constitute ‘good’ tourism experiences and is imposed on individuals who are prompted to desire a constantly renewing range of tourism experiences.     

Drivers of importer trust and commitment: Evidence from a developing country

This study investigates the interrelationships between antecedents of importers' trust and commitment to their foreign suppliers in an Asian country. This area has been under-researched in comparison to exporters' behavioral perspectives as well as in comparison to developed countries. A theoretical model is developed based on theories of transaction cost (TC) and the internationalization process (IP), and studies examined regarding the context of relationship trust and commitment. The model is tested using SEM on a sample of 238 importers in Bangladesh. The findings suggest that importer trust leads to commitment but that foreign supplier's opportunistic inclination affects both their trust and commitment. Overall, the findings indicate that cultural similarity, effective communication, knowledge and experience, opportunism and environmental uncertainty are vital antecedents of trust and commitment. The findings have important implications for academics and practitioners.     

Challenges facing China's unbalanced urbanization strategy

China has taken a “great leap forward” in urbanization, but the resulting unbalanced development strategy seems likely to lead to unsustainable socioeconomic development, including increasing income disparities, waste of resources, environmental degradation, damage to China's natural and cultural heritages, growing social turbulence, and consequences for the rest of the world. To solve these problems, China's government must adjust its economic strategy to balance rural and urban development and to seek more sustainable socioeconomic development.