关于单参数正态分布族的双边假设检验问题的讨论

讨论单参数正态分布族的双边假设检验问题,是基于考虑在第一类错误的概率为α的检验类中如何求取一个第二类错误概率最小的检验。     

基于P-范分布下的三维激光点位误差分布检验

目前,在对三维激光点位误差模型进行推导的过程中,都是假设三维激光点位误差是服从正态分布的,而由于三维激光点位误差源与传统测量仪器中的误差源不同,同时外界环境对激光点位误差的影响也不相同,因此,不能直接断定点位误差服从正态分布,需要对其理论分析及数据统计分析验证。针对三维激光点位误差分布状况,本文对激光点位误差模型进行了推导,并通过大量数据统计分析验证了激光点位误差服从的分布状况。     

Light emitting diodes and the lighting revolution: The emergence of a solid-state lighting industry

Emergence of new industries from evolving technologies is critical to the global economy, yet has been relatively understudied due to the paucity of available data. This study draws lessons on industry emergence, by analyzing how a solid-state lighting (SSL) industry grew out of light emitting diode (LED) technologies that evolved for half a century, with participation by tens of thousands of researchers in universities, national laboratories, and firms. Using data on publications, patents, and firms combined with business history we trace the evolution of SSL through a succession of market niches. At times a few researchers with unorthodox research approaches made breakthroughs that greatly advanced particular technology trajectories and pushed LED research in unexpected directions. A succession of LED market niches advanced the technology and provided profits to incentivize continuing research while reducing cost and improving efficacy of LEDs. Innovating firms developed a thicket of patents and captured substantial profit, but were embroiled in extensive litigation that was ultimately resolved through cross-licensing. A major new generation of lighting products is now disrupting the traditional lighting industry. Although the leading incumbent lighting firms all invested early and heavily in SSL, the industry's future leadership is uncertain.     

When do firms rely on their knowledge spillover recipients for guidance in exploring unfamiliar knowledge?

Knowledge spillover occurs when recipient firms combine the knowledge of an originating firm with other knowledge. When recipient firms combine the originating firm's knowledge with knowledge that is unfamiliar to the originating firm, the recipient firms potentially provide insight to the originating firm on the viability of exploring such knowledge. By mimicking its recipient firms, the originating firm reduces the challenge and uncertainty of exploring unfamiliar knowledge domains. We examine the exploration activities of 87 telecommunications equipment manufacturers over a ten-year time period. We argue that those firms that operate in competitive and dynamic market environments promoting conservative risk-taking behavior will value such uncertainty reduction more highly and thus rely to a greater extent on their recipient firms for guidance on where to explore for new expertise. In contrast, firms in high-growth market environments are more likely to look beyond the activities of recipient firms when exploring new technological domains and rely less on mimicking their recipient firms.     

从萨丕尔-沃尔夫假说看二语习得中的母语迁移

萨丕尔-沃尔夫假说是结构主义语言学的重要学说之一,它从人类语言的多样性出发,探究语言和思维、文化之间的关系,对外语教学与研究具有重要的理论价值和现实意义。本文将萨丕尔-沃尔夫假说运用于二语习得,分析母语正迁移和负迁移对二语习得的影响,并总结出两种迁移对二语习得的启示。     

论法治经济与转型发展

从自然经济、计划经济到市场经济,社会经济关系由等级关系、人身依附关系、命令和服从关系向着平等、自由、独立、开放的社会关系转变;权和法,由权本位、官本位、法律虚无向着民本位、法律本位、法律至上转化。这个经济现代化进程,是用法律和制度控制权力的民主化法治化过程。然而,权力的退出是渐进式的变革,伴随着控制和反控制的较量。必须依靠法治,把权力关进制度的笼子,建立法治经济,根除特权思想和特权现象,建立起完善的市场经济秩序。     

Examining the participation patterns of an ageing population with disabilities in Australia

Social policies facilitate equity of access for participation in physical activity by all groups of people in society. While the sport participation of able-bodied people has been widely examined, much less attention has been given to the participation of people with disabilities. The purpose of this study is to investigate the patterns of participation in physical activity of people with disabilities. Based on the leisure constraint theory, a theoretical framework is developed that describes participation as a function of intrapersonal, interpersonal, and structural constraints. The framework is tested using a comprehensive sample of people in Australia from 2009 and 2010. From the dataset a sub-sample of people with disabilities was identified (n = 4342). As 78.1% of participants were aged 45 years and older, the sample represents an ageing population and a selected segment of the population of people with disabilities. Therefore, generalisations to disability sport need to be made with caution. The results show that 57% of the respondents participate in physical activity for an average of 4 h per week. The regression results indicate that the type of disability, the extent to which the person is restricted by the disability, age, gender, and education have a significant effect on participation. People with high workloads who are in a relationship participate less frequently. The cluster analysis resulted in two non-participant clusters and three participant clusters. The results inform policy makers and sport managers on ways to better support the participation of people with disabilities and specifically target their needs.     

发展我国体育市场的经济背景和社会背景之分析

本文对我国体育市场目前所处的经济背景和社会背景进行了分析。作者认为：尽管我国目前要繁荣体育市场在经济条件和社会条件上尚有诸多欠缺，但是其发展前景是非常美好的。随着我国经济的发展和人民生活水平的提高，以及体育市场法制的健全和我国各项运动水平的提高，体育市场在我国必然会越来越兴旺的．     

Introductory statistics in the garden

This article describes four semesters of introductory statistics courses that incorporate service learning and gardening into the curriculum with applications of the binomial distribution, least squares regression and hypothesis testing. The activities span multiple semesters and are iterative in nature.     

Leveraging global markets: Lessons from Alcoa Alumina

Globalization has contributed to the dismantling of national boundaries, which have enabled firms to compete and conduct business on a wider scale [Held, D., McGrew, A., Goldblatt, D., & Perraton, J. (1999). Global transformations. Politics, economics and culture. Cambridge: Polity Press]. Firms can move freely between different markets using Internet-based technology. While access to such markets can provide firms with greater choice of suppliers and cost efficiencies, they need to be aware of challenges that can influence their business performance. With this in mind, we examine how these factors influenced Alcoa Alumina's drive to a global procurement platform through a global marketplace. The staged adoption process experienced at Alcoa Alumina offers a learning opportunity for other firms considering the transition to global marketplace.